Mercurial > hg
annotate mercurial/wireprotoframing.py @ 46924:ca0049946e9a
split: avoid strip if split is a no-op (identical to original)
Differential Revision: https://phab.mercurial-scm.org/D10389
author | Kyle Lippincott <spectral@google.com> |
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date | Mon, 12 Apr 2021 19:25:34 -0700 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
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1 # wireprotoframing.py - unified framing protocol for wire protocol |
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2 # |
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3 # Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 # This file contains functionality to support the unified frame-based wire |
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9 # protocol. For details about the protocol, see |
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10 # `hg help internals.wireprotocol`. |
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11 |
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12 from __future__ import absolute_import |
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13 |
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14 import collections |
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15 import struct |
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16 |
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17 from .i18n import _ |
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18 from .pycompat import getattr |
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19 from .thirdparty import attr |
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20 from . import ( |
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21 encoding, |
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22 error, |
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23 pycompat, |
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24 util, |
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25 wireprototypes, |
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26 ) |
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27 from .utils import ( |
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28 cborutil, |
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29 stringutil, |
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30 ) |
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31 |
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32 FRAME_HEADER_SIZE = 8 |
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33 DEFAULT_MAX_FRAME_SIZE = 32768 |
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34 |
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35 STREAM_FLAG_BEGIN_STREAM = 0x01 |
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36 STREAM_FLAG_END_STREAM = 0x02 |
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37 STREAM_FLAG_ENCODING_APPLIED = 0x04 |
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38 |
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39 STREAM_FLAGS = { |
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40 b'stream-begin': STREAM_FLAG_BEGIN_STREAM, |
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41 b'stream-end': STREAM_FLAG_END_STREAM, |
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42 b'encoded': STREAM_FLAG_ENCODING_APPLIED, |
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43 } |
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44 |
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45 FRAME_TYPE_COMMAND_REQUEST = 0x01 |
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46 FRAME_TYPE_COMMAND_DATA = 0x02 |
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47 FRAME_TYPE_COMMAND_RESPONSE = 0x03 |
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48 FRAME_TYPE_ERROR_RESPONSE = 0x05 |
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49 FRAME_TYPE_TEXT_OUTPUT = 0x06 |
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50 FRAME_TYPE_PROGRESS = 0x07 |
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51 FRAME_TYPE_SENDER_PROTOCOL_SETTINGS = 0x08 |
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52 FRAME_TYPE_STREAM_SETTINGS = 0x09 |
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53 |
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54 FRAME_TYPES = { |
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55 b'command-request': FRAME_TYPE_COMMAND_REQUEST, |
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56 b'command-data': FRAME_TYPE_COMMAND_DATA, |
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57 b'command-response': FRAME_TYPE_COMMAND_RESPONSE, |
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58 b'error-response': FRAME_TYPE_ERROR_RESPONSE, |
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59 b'text-output': FRAME_TYPE_TEXT_OUTPUT, |
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60 b'progress': FRAME_TYPE_PROGRESS, |
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61 b'sender-protocol-settings': FRAME_TYPE_SENDER_PROTOCOL_SETTINGS, |
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62 b'stream-settings': FRAME_TYPE_STREAM_SETTINGS, |
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63 } |
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64 |
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65 FLAG_COMMAND_REQUEST_NEW = 0x01 |
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66 FLAG_COMMAND_REQUEST_CONTINUATION = 0x02 |
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67 FLAG_COMMAND_REQUEST_MORE_FRAMES = 0x04 |
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68 FLAG_COMMAND_REQUEST_EXPECT_DATA = 0x08 |
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69 |
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70 FLAGS_COMMAND_REQUEST = { |
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71 b'new': FLAG_COMMAND_REQUEST_NEW, |
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72 b'continuation': FLAG_COMMAND_REQUEST_CONTINUATION, |
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73 b'more': FLAG_COMMAND_REQUEST_MORE_FRAMES, |
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74 b'have-data': FLAG_COMMAND_REQUEST_EXPECT_DATA, |
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75 } |
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76 |
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77 FLAG_COMMAND_DATA_CONTINUATION = 0x01 |
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78 FLAG_COMMAND_DATA_EOS = 0x02 |
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79 |
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80 FLAGS_COMMAND_DATA = { |
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81 b'continuation': FLAG_COMMAND_DATA_CONTINUATION, |
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82 b'eos': FLAG_COMMAND_DATA_EOS, |
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83 } |
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84 |
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85 FLAG_COMMAND_RESPONSE_CONTINUATION = 0x01 |
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86 FLAG_COMMAND_RESPONSE_EOS = 0x02 |
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87 |
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88 FLAGS_COMMAND_RESPONSE = { |
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89 b'continuation': FLAG_COMMAND_RESPONSE_CONTINUATION, |
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90 b'eos': FLAG_COMMAND_RESPONSE_EOS, |
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91 } |
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92 |
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93 FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION = 0x01 |
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94 FLAG_SENDER_PROTOCOL_SETTINGS_EOS = 0x02 |
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95 |
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96 FLAGS_SENDER_PROTOCOL_SETTINGS = { |
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97 b'continuation': FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION, |
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98 b'eos': FLAG_SENDER_PROTOCOL_SETTINGS_EOS, |
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99 } |
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100 |
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101 FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION = 0x01 |
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102 FLAG_STREAM_ENCODING_SETTINGS_EOS = 0x02 |
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103 |
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104 FLAGS_STREAM_ENCODING_SETTINGS = { |
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105 b'continuation': FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION, |
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106 b'eos': FLAG_STREAM_ENCODING_SETTINGS_EOS, |
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107 } |
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108 |
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109 # Maps frame types to their available flags. |
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110 FRAME_TYPE_FLAGS = { |
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111 FRAME_TYPE_COMMAND_REQUEST: FLAGS_COMMAND_REQUEST, |
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112 FRAME_TYPE_COMMAND_DATA: FLAGS_COMMAND_DATA, |
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113 FRAME_TYPE_COMMAND_RESPONSE: FLAGS_COMMAND_RESPONSE, |
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114 FRAME_TYPE_ERROR_RESPONSE: {}, |
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115 FRAME_TYPE_TEXT_OUTPUT: {}, |
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116 FRAME_TYPE_PROGRESS: {}, |
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117 FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: FLAGS_SENDER_PROTOCOL_SETTINGS, |
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118 FRAME_TYPE_STREAM_SETTINGS: FLAGS_STREAM_ENCODING_SETTINGS, |
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119 } |
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120 |
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121 ARGUMENT_RECORD_HEADER = struct.Struct('<HH') |
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122 |
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123 |
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124 def humanflags(mapping, value): |
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125 """Convert a numeric flags value to a human value, using a mapping table.""" |
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126 namemap = {v: k for k, v in pycompat.iteritems(mapping)} |
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127 flags = [] |
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128 val = 1 |
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129 while value >= val: |
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130 if value & val: |
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131 flags.append(namemap.get(val, b'<unknown 0x%02x>' % val)) |
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132 val <<= 1 |
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133 |
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134 return b'|'.join(flags) |
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135 |
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136 |
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137 @attr.s(slots=True) |
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138 class frameheader(object): |
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139 """Represents the data in a frame header.""" |
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140 |
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141 length = attr.ib() |
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142 requestid = attr.ib() |
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143 streamid = attr.ib() |
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144 streamflags = attr.ib() |
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145 typeid = attr.ib() |
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146 flags = attr.ib() |
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147 |
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148 |
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149 @attr.s(slots=True, repr=False) |
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150 class frame(object): |
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151 """Represents a parsed frame.""" |
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152 |
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153 requestid = attr.ib() |
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154 streamid = attr.ib() |
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155 streamflags = attr.ib() |
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156 typeid = attr.ib() |
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157 flags = attr.ib() |
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158 payload = attr.ib() |
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159 |
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160 @encoding.strmethod |
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161 def __repr__(self): |
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162 typename = b'<unknown 0x%02x>' % self.typeid |
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163 for name, value in pycompat.iteritems(FRAME_TYPES): |
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164 if value == self.typeid: |
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165 typename = name |
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166 break |
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167 |
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168 return ( |
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169 b'frame(size=%d; request=%d; stream=%d; streamflags=%s; ' |
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170 b'type=%s; flags=%s)' |
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171 % ( |
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172 len(self.payload), |
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173 self.requestid, |
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174 self.streamid, |
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175 humanflags(STREAM_FLAGS, self.streamflags), |
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176 typename, |
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177 humanflags(FRAME_TYPE_FLAGS.get(self.typeid, {}), self.flags), |
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178 ) |
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179 ) |
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180 |
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181 |
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182 def makeframe(requestid, streamid, streamflags, typeid, flags, payload): |
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183 """Assemble a frame into a byte array.""" |
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184 # TODO assert size of payload. |
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185 frame = bytearray(FRAME_HEADER_SIZE + len(payload)) |
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186 |
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187 # 24 bits length |
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188 # 16 bits request id |
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189 # 8 bits stream id |
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190 # 8 bits stream flags |
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191 # 4 bits type |
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192 # 4 bits flags |
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193 |
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194 l = struct.pack('<I', len(payload)) |
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195 frame[0:3] = l[0:3] |
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196 struct.pack_into('<HBB', frame, 3, requestid, streamid, streamflags) |
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197 frame[7] = (typeid << 4) | flags |
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198 frame[8:] = payload |
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199 |
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200 return frame |
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201 |
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202 |
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203 def makeframefromhumanstring(s): |
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204 """Create a frame from a human readable string |
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205 |
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206 Strings have the form: |
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207 |
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208 <request-id> <stream-id> <stream-flags> <type> <flags> <payload> |
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209 |
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210 This can be used by user-facing applications and tests for creating |
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211 frames easily without having to type out a bunch of constants. |
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212 |
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213 Request ID and stream IDs are integers. |
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214 |
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215 Stream flags, frame type, and flags can be specified by integer or |
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216 named constant. |
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217 |
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218 Flags can be delimited by `|` to bitwise OR them together. |
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219 |
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220 If the payload begins with ``cbor:``, the following string will be |
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221 evaluated as Python literal and the resulting object will be fed into |
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222 a CBOR encoder. Otherwise, the payload is interpreted as a Python |
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223 byte string literal. |
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224 """ |
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225 fields = s.split(b' ', 5) |
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226 requestid, streamid, streamflags, frametype, frameflags, payload = fields |
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227 |
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228 requestid = int(requestid) |
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229 streamid = int(streamid) |
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230 |
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231 finalstreamflags = 0 |
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232 for flag in streamflags.split(b'|'): |
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233 if flag in STREAM_FLAGS: |
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234 finalstreamflags |= STREAM_FLAGS[flag] |
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235 else: |
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236 finalstreamflags |= int(flag) |
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237 |
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238 if frametype in FRAME_TYPES: |
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239 frametype = FRAME_TYPES[frametype] |
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240 else: |
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241 frametype = int(frametype) |
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242 |
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243 finalflags = 0 |
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244 validflags = FRAME_TYPE_FLAGS[frametype] |
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245 for flag in frameflags.split(b'|'): |
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246 if flag in validflags: |
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247 finalflags |= validflags[flag] |
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248 else: |
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249 finalflags |= int(flag) |
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250 |
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251 if payload.startswith(b'cbor:'): |
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252 payload = b''.join( |
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253 cborutil.streamencode(stringutil.evalpythonliteral(payload[5:])) |
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254 ) |
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255 |
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256 else: |
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257 payload = stringutil.unescapestr(payload) |
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258 |
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259 return makeframe( |
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260 requestid=requestid, |
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261 streamid=streamid, |
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262 streamflags=finalstreamflags, |
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263 typeid=frametype, |
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264 flags=finalflags, |
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265 payload=payload, |
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266 ) |
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267 |
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268 |
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269 def parseheader(data): |
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270 """Parse a unified framing protocol frame header from a buffer. |
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271 |
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272 The header is expected to be in the buffer at offset 0 and the |
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273 buffer is expected to be large enough to hold a full header. |
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274 """ |
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275 # 24 bits payload length (little endian) |
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276 # 16 bits request ID |
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277 # 8 bits stream ID |
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278 # 8 bits stream flags |
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279 # 4 bits frame type |
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280 # 4 bits frame flags |
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281 # ... payload |
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282 framelength = data[0] + 256 * data[1] + 16384 * data[2] |
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283 requestid, streamid, streamflags = struct.unpack_from('<HBB', data, 3) |
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284 typeflags = data[7] |
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285 |
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286 frametype = (typeflags & 0xF0) >> 4 |
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287 frameflags = typeflags & 0x0F |
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288 |
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289 return frameheader( |
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290 framelength, requestid, streamid, streamflags, frametype, frameflags |
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291 ) |
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292 |
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293 |
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294 def readframe(fh): |
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295 """Read a unified framing protocol frame from a file object. |
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296 |
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297 Returns a 3-tuple of (type, flags, payload) for the decoded frame or |
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298 None if no frame is available. May raise if a malformed frame is |
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299 seen. |
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300 """ |
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301 header = bytearray(FRAME_HEADER_SIZE) |
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302 |
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303 readcount = fh.readinto(header) |
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304 |
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305 if readcount == 0: |
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306 return None |
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307 |
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308 if readcount != FRAME_HEADER_SIZE: |
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309 raise error.Abort( |
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310 _(b'received incomplete frame: got %d bytes: %s') |
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311 % (readcount, header) |
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312 ) |
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313 |
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314 h = parseheader(header) |
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315 |
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316 payload = fh.read(h.length) |
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317 if len(payload) != h.length: |
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318 raise error.Abort( |
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319 _(b'frame length error: expected %d; got %d') |
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320 % (h.length, len(payload)) |
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321 ) |
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322 |
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323 return frame( |
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324 h.requestid, h.streamid, h.streamflags, h.typeid, h.flags, payload |
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325 ) |
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326 |
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327 |
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328 def createcommandframes( |
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329 stream, |
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330 requestid, |
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331 cmd, |
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332 args, |
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333 datafh=None, |
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334 maxframesize=DEFAULT_MAX_FRAME_SIZE, |
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335 redirect=None, |
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336 ): |
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337 """Create frames necessary to transmit a request to run a command. |
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338 |
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339 This is a generator of bytearrays. Each item represents a frame |
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340 ready to be sent over the wire to a peer. |
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341 """ |
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342 data = {b'name': cmd} |
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343 if args: |
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344 data[b'args'] = args |
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345 |
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346 if redirect: |
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347 data[b'redirect'] = redirect |
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348 |
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349 data = b''.join(cborutil.streamencode(data)) |
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350 |
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351 offset = 0 |
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352 |
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353 while True: |
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354 flags = 0 |
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355 |
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356 # Must set new or continuation flag. |
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357 if not offset: |
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358 flags |= FLAG_COMMAND_REQUEST_NEW |
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359 else: |
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360 flags |= FLAG_COMMAND_REQUEST_CONTINUATION |
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361 |
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362 # Data frames is set on all frames. |
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363 if datafh: |
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364 flags |= FLAG_COMMAND_REQUEST_EXPECT_DATA |
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365 |
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366 payload = data[offset : offset + maxframesize] |
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367 offset += len(payload) |
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368 |
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369 if len(payload) == maxframesize and offset < len(data): |
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370 flags |= FLAG_COMMAND_REQUEST_MORE_FRAMES |
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371 |
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372 yield stream.makeframe( |
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373 requestid=requestid, |
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374 typeid=FRAME_TYPE_COMMAND_REQUEST, |
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375 flags=flags, |
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376 payload=payload, |
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377 ) |
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378 |
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379 if not (flags & FLAG_COMMAND_REQUEST_MORE_FRAMES): |
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380 break |
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381 |
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382 if datafh: |
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383 while True: |
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384 data = datafh.read(DEFAULT_MAX_FRAME_SIZE) |
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385 |
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386 done = False |
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387 if len(data) == DEFAULT_MAX_FRAME_SIZE: |
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388 flags = FLAG_COMMAND_DATA_CONTINUATION |
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389 else: |
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390 flags = FLAG_COMMAND_DATA_EOS |
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391 assert datafh.read(1) == b'' |
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392 done = True |
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393 |
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394 yield stream.makeframe( |
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395 requestid=requestid, |
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396 typeid=FRAME_TYPE_COMMAND_DATA, |
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397 flags=flags, |
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398 payload=data, |
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399 ) |
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400 |
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401 if done: |
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402 break |
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403 |
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404 |
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405 def createcommandresponseokframe(stream, requestid): |
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406 overall = b''.join(cborutil.streamencode({b'status': b'ok'})) |
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407 |
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408 if stream.streamsettingssent: |
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409 overall = stream.encode(overall) |
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410 encoded = True |
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411 |
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412 if not overall: |
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413 return None |
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414 else: |
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415 encoded = False |
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416 |
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417 return stream.makeframe( |
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418 requestid=requestid, |
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419 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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420 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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421 payload=overall, |
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422 encoded=encoded, |
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423 ) |
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424 |
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425 |
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426 def createcommandresponseeosframes( |
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427 stream, requestid, maxframesize=DEFAULT_MAX_FRAME_SIZE |
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428 ): |
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429 """Create an empty payload frame representing command end-of-stream.""" |
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430 payload = stream.flush() |
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431 |
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432 offset = 0 |
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433 while True: |
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434 chunk = payload[offset : offset + maxframesize] |
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435 offset += len(chunk) |
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|
436 |
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437 done = offset == len(payload) |
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|
438 |
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|
439 if done: |
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440 flags = FLAG_COMMAND_RESPONSE_EOS |
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441 else: |
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442 flags = FLAG_COMMAND_RESPONSE_CONTINUATION |
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443 |
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444 yield stream.makeframe( |
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445 requestid=requestid, |
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446 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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447 flags=flags, |
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448 payload=chunk, |
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449 encoded=payload != b'', |
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450 ) |
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|
451 |
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|
452 if done: |
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|
453 break |
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454 |
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455 |
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|
456 def createalternatelocationresponseframe(stream, requestid, location): |
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457 data = { |
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|
458 b'status': b'redirect', |
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|
459 b'location': { |
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|
460 b'url': location.url, |
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461 b'mediatype': location.mediatype, |
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462 }, |
40025
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|
463 } |
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464 |
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465 for a in ( |
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|
466 'size', |
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|
467 'fullhashes', |
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|
468 'fullhashseed', |
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|
469 'serverdercerts', |
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470 'servercadercerts', |
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471 ): |
40025
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|
472 value = getattr(location, a) |
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|
473 if value is not None: |
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|
474 data[b'location'][pycompat.bytestr(a)] = value |
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|
475 |
40138
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|
476 payload = b''.join(cborutil.streamencode(data)) |
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|
477 |
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|
478 if stream.streamsettingssent: |
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|
479 payload = stream.encode(payload) |
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|
480 encoded = True |
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|
481 else: |
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|
482 encoded = False |
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|
483 |
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484 return stream.makeframe( |
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485 requestid=requestid, |
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486 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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487 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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488 payload=payload, |
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489 encoded=encoded, |
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490 ) |
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491 |
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492 |
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493 def createcommanderrorresponse(stream, requestid, message, args=None): |
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494 # TODO should this be using a list of {'msg': ..., 'args': {}} so atom |
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495 # formatting works consistently? |
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496 m = { |
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497 b'status': b'error', |
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498 b'error': { |
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499 b'message': message, |
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500 }, |
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501 } |
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502 |
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503 if args: |
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504 m[b'error'][b'args'] = args |
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505 |
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506 overall = b''.join(cborutil.streamencode(m)) |
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507 |
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508 yield stream.makeframe( |
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509 requestid=requestid, |
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510 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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511 flags=FLAG_COMMAND_RESPONSE_EOS, |
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512 payload=overall, |
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513 ) |
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514 |
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515 |
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516 def createerrorframe(stream, requestid, msg, errtype): |
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517 # TODO properly handle frame size limits. |
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518 assert len(msg) <= DEFAULT_MAX_FRAME_SIZE |
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519 |
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520 payload = b''.join( |
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521 cborutil.streamencode( |
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522 { |
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523 b'type': errtype, |
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524 b'message': [{b'msg': msg}], |
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525 } |
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526 ) |
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527 ) |
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528 |
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529 yield stream.makeframe( |
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530 requestid=requestid, |
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531 typeid=FRAME_TYPE_ERROR_RESPONSE, |
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532 flags=0, |
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533 payload=payload, |
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534 ) |
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535 |
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536 |
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537 def createtextoutputframe( |
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538 stream, requestid, atoms, maxframesize=DEFAULT_MAX_FRAME_SIZE |
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539 ): |
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540 """Create a text output frame to render text to people. |
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541 |
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542 ``atoms`` is a 3-tuple of (formatting string, args, labels). |
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543 |
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544 The formatting string contains ``%s`` tokens to be replaced by the |
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545 corresponding indexed entry in ``args``. ``labels`` is an iterable of |
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546 formatters to be applied at rendering time. In terms of the ``ui`` |
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547 class, each atom corresponds to a ``ui.write()``. |
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548 """ |
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549 atomdicts = [] |
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550 |
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551 for (formatting, args, labels) in atoms: |
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552 # TODO look for localstr, other types here? |
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553 |
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554 if not isinstance(formatting, bytes): |
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555 raise ValueError(b'must use bytes formatting strings') |
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556 for arg in args: |
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557 if not isinstance(arg, bytes): |
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558 raise ValueError(b'must use bytes for arguments') |
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559 for label in labels: |
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560 if not isinstance(label, bytes): |
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561 raise ValueError(b'must use bytes for labels') |
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562 |
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563 # Formatting string must be ASCII. |
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564 formatting = formatting.decode('ascii', 'replace').encode('ascii') |
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565 |
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566 # Arguments must be UTF-8. |
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567 args = [a.decode('utf-8', 'replace').encode('utf-8') for a in args] |
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568 |
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569 # Labels must be ASCII. |
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570 labels = [l.decode('ascii', 'strict').encode('ascii') for l in labels] |
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571 |
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572 atom = {b'msg': formatting} |
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573 if args: |
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574 atom[b'args'] = args |
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575 if labels: |
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576 atom[b'labels'] = labels |
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577 |
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578 atomdicts.append(atom) |
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579 |
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580 payload = b''.join(cborutil.streamencode(atomdicts)) |
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581 |
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582 if len(payload) > maxframesize: |
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583 raise ValueError(b'cannot encode data in a single frame') |
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584 |
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585 yield stream.makeframe( |
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586 requestid=requestid, |
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587 typeid=FRAME_TYPE_TEXT_OUTPUT, |
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588 flags=0, |
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589 payload=payload, |
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590 ) |
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591 |
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592 |
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593 class bufferingcommandresponseemitter(object): |
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594 """Helper object to emit command response frames intelligently. |
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595 |
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596 Raw command response data is likely emitted in chunks much smaller |
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597 than what can fit in a single frame. This class exists to buffer |
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598 chunks until enough data is available to fit in a single frame. |
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599 |
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600 TODO we'll need something like this when compression is supported. |
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601 So it might make sense to implement this functionality at the stream |
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602 level. |
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603 """ |
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604 |
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605 def __init__(self, stream, requestid, maxframesize=DEFAULT_MAX_FRAME_SIZE): |
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606 self._stream = stream |
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607 self._requestid = requestid |
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608 self._maxsize = maxframesize |
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609 self._chunks = [] |
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610 self._chunkssize = 0 |
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611 |
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612 def send(self, data): |
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613 """Send new data for emission. |
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|
614 |
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615 Is a generator of new frames that were derived from the new input. |
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616 |
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617 If the special input ``None`` is received, flushes all buffered |
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618 data to frames. |
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|
619 """ |
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|
620 |
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|
621 if data is None: |
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622 for frame in self._flush(): |
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623 yield frame |
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|
624 return |
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625 |
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626 data = self._stream.encode(data) |
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627 |
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628 # There is a ton of potential to do more complicated things here. |
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629 # Our immediate goal is to coalesce small chunks into big frames, |
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630 # not achieve the fewest number of frames possible. So we go with |
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631 # a simple implementation: |
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632 # |
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633 # * If a chunk is too large for a frame, we flush and emit frames |
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634 # for the new chunk. |
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635 # * If a chunk can be buffered without total buffered size limits |
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636 # being exceeded, we do that. |
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637 # * If a chunk causes us to go over our buffering limit, we flush |
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638 # and then buffer the new chunk. |
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639 |
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640 if not data: |
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641 return |
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|
642 |
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643 if len(data) > self._maxsize: |
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644 for frame in self._flush(): |
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645 yield frame |
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changeset
|
646 |
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647 # Now emit frames for the big chunk. |
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648 offset = 0 |
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649 while True: |
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650 chunk = data[offset : offset + self._maxsize] |
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651 offset += len(chunk) |
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652 |
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653 yield self._stream.makeframe( |
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654 self._requestid, |
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655 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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656 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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657 payload=chunk, |
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658 encoded=True, |
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659 ) |
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|
660 |
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661 if offset == len(data): |
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662 return |
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|
663 |
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664 # If we don't have enough to constitute a full frame, buffer and |
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665 # return. |
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666 if len(data) + self._chunkssize < self._maxsize: |
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667 self._chunks.append(data) |
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668 self._chunkssize += len(data) |
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669 return |
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|
670 |
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671 # Else flush what we have and buffer the new chunk. We could do |
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672 # something more intelligent here, like break the chunk. Let's |
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673 # keep things simple for now. |
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674 for frame in self._flush(): |
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|
675 yield frame |
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|
676 |
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677 self._chunks.append(data) |
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678 self._chunkssize = len(data) |
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|
679 |
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|
680 def _flush(self): |
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681 payload = b''.join(self._chunks) |
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682 assert len(payload) <= self._maxsize |
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|
683 |
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684 self._chunks[:] = [] |
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685 self._chunkssize = 0 |
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|
686 |
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687 if not payload: |
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|
688 return |
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|
689 |
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|
690 yield self._stream.makeframe( |
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|
691 self._requestid, |
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692 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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693 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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694 payload=payload, |
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695 encoded=True, |
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696 ) |
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|
697 |
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|
698 |
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699 # TODO consider defining encoders/decoders using the util.compressionengine |
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|
700 # mechanism. |
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|
701 |
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702 |
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|
703 class identityencoder(object): |
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|
704 """Encoder for the "identity" stream encoding profile.""" |
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|
705 |
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|
706 def __init__(self, ui): |
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|
707 pass |
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|
708 |
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709 def encode(self, data): |
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710 return data |
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|
711 |
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|
712 def flush(self): |
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|
713 return b'' |
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|
714 |
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|
715 def finish(self): |
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|
716 return b'' |
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|
717 |
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|
718 |
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|
719 class identitydecoder(object): |
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720 """Decoder for the "identity" stream encoding profile.""" |
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721 |
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722 def __init__(self, ui, extraobjs): |
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|
723 if extraobjs: |
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|
724 raise error.Abort( |
43117
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|
725 _(b'identity decoder received unexpected additional values') |
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726 ) |
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727 |
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728 def decode(self, data): |
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729 return data |
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730 |
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731 |
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732 class zlibencoder(object): |
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733 def __init__(self, ui): |
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734 import zlib |
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735 |
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736 self._zlib = zlib |
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737 self._compressor = zlib.compressobj() |
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738 |
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739 def encode(self, data): |
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740 return self._compressor.compress(data) |
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741 |
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742 def flush(self): |
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743 # Z_SYNC_FLUSH doesn't reset compression context, which is |
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744 # what we want. |
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745 return self._compressor.flush(self._zlib.Z_SYNC_FLUSH) |
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746 |
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747 def finish(self): |
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748 res = self._compressor.flush(self._zlib.Z_FINISH) |
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749 self._compressor = None |
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750 return res |
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751 |
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752 |
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753 class zlibdecoder(object): |
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754 def __init__(self, ui, extraobjs): |
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755 import zlib |
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756 |
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757 if extraobjs: |
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758 raise error.Abort( |
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759 _(b'zlib decoder received unexpected additional values') |
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760 ) |
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761 |
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762 self._decompressor = zlib.decompressobj() |
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763 |
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764 def decode(self, data): |
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765 # Python 2's zlib module doesn't use the buffer protocol and can't |
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766 # handle all bytes-like types. |
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767 if not pycompat.ispy3 and isinstance(data, bytearray): |
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768 data = bytes(data) |
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769 |
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770 return self._decompressor.decompress(data) |
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771 |
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772 |
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773 class zstdbaseencoder(object): |
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774 def __init__(self, level): |
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775 from . import zstd |
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776 |
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777 self._zstd = zstd |
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778 cctx = zstd.ZstdCompressor(level=level) |
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779 self._compressor = cctx.compressobj() |
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780 |
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781 def encode(self, data): |
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782 return self._compressor.compress(data) |
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783 |
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784 def flush(self): |
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785 # COMPRESSOBJ_FLUSH_BLOCK flushes all data previously fed into the |
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786 # compressor and allows a decompressor to access all encoded data |
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787 # up to this point. |
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788 return self._compressor.flush(self._zstd.COMPRESSOBJ_FLUSH_BLOCK) |
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789 |
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790 def finish(self): |
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791 res = self._compressor.flush(self._zstd.COMPRESSOBJ_FLUSH_FINISH) |
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792 self._compressor = None |
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793 return res |
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794 |
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795 |
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796 class zstd8mbencoder(zstdbaseencoder): |
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797 def __init__(self, ui): |
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798 super(zstd8mbencoder, self).__init__(3) |
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799 |
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800 |
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801 class zstdbasedecoder(object): |
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802 def __init__(self, maxwindowsize): |
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803 from . import zstd |
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804 |
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805 dctx = zstd.ZstdDecompressor(max_window_size=maxwindowsize) |
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806 self._decompressor = dctx.decompressobj() |
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807 |
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808 def decode(self, data): |
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809 return self._decompressor.decompress(data) |
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810 |
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811 |
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812 class zstd8mbdecoder(zstdbasedecoder): |
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813 def __init__(self, ui, extraobjs): |
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814 if extraobjs: |
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815 raise error.Abort( |
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816 _(b'zstd8mb decoder received unexpected additional values') |
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817 ) |
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818 |
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819 super(zstd8mbdecoder, self).__init__(maxwindowsize=8 * 1048576) |
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820 |
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821 |
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822 # We lazily populate this to avoid excessive module imports when importing |
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823 # this module. |
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824 STREAM_ENCODERS = {} |
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825 STREAM_ENCODERS_ORDER = [] |
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826 |
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827 |
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828 def populatestreamencoders(): |
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829 if STREAM_ENCODERS: |
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830 return |
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831 |
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832 try: |
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833 from . import zstd |
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834 |
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835 zstd.__version__ |
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836 except ImportError: |
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837 zstd = None |
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838 |
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839 # zstandard is fastest and is preferred. |
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840 if zstd: |
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841 STREAM_ENCODERS[b'zstd-8mb'] = (zstd8mbencoder, zstd8mbdecoder) |
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842 STREAM_ENCODERS_ORDER.append(b'zstd-8mb') |
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843 |
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844 STREAM_ENCODERS[b'zlib'] = (zlibencoder, zlibdecoder) |
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845 STREAM_ENCODERS_ORDER.append(b'zlib') |
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846 |
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847 STREAM_ENCODERS[b'identity'] = (identityencoder, identitydecoder) |
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848 STREAM_ENCODERS_ORDER.append(b'identity') |
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849 |
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850 |
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851 class stream(object): |
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852 """Represents a logical unidirectional series of frames.""" |
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|
853 |
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854 def __init__(self, streamid, active=False): |
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855 self.streamid = streamid |
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856 self._active = active |
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857 |
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858 def makeframe(self, requestid, typeid, flags, payload): |
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859 """Create a frame to be sent out over this stream. |
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860 |
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861 Only returns the frame instance. Does not actually send it. |
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862 """ |
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863 streamflags = 0 |
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864 if not self._active: |
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865 streamflags |= STREAM_FLAG_BEGIN_STREAM |
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866 self._active = True |
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867 |
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868 return makeframe( |
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869 requestid, self.streamid, streamflags, typeid, flags, payload |
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870 ) |
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871 |
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872 |
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873 class inputstream(stream): |
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874 """Represents a stream used for receiving data.""" |
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875 |
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876 def __init__(self, streamid, active=False): |
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877 super(inputstream, self).__init__(streamid, active=active) |
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878 self._decoder = None |
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879 |
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880 def setdecoder(self, ui, name, extraobjs): |
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881 """Set the decoder for this stream. |
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|
882 |
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883 Receives the stream profile name and any additional CBOR objects |
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|
884 decoded from the stream encoding settings frame payloads. |
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885 """ |
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886 if name not in STREAM_ENCODERS: |
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887 raise error.Abort(_(b'unknown stream decoder: %s') % name) |
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888 |
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|
889 self._decoder = STREAM_ENCODERS[name][1](ui, extraobjs) |
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890 |
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891 def decode(self, data): |
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892 # Default is identity decoder. We don't bother instantiating one |
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893 # because it is trivial. |
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894 if not self._decoder: |
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895 return data |
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|
896 |
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897 return self._decoder.decode(data) |
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898 |
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899 def flush(self): |
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900 if not self._decoder: |
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901 return b'' |
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|
902 |
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|
903 return self._decoder.flush() |
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|
904 |
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905 |
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|
906 class outputstream(stream): |
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|
907 """Represents a stream used for sending data.""" |
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|
908 |
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909 def __init__(self, streamid, active=False): |
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910 super(outputstream, self).__init__(streamid, active=active) |
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911 self.streamsettingssent = False |
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912 self._encoder = None |
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913 self._encodername = None |
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|
914 |
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|
915 def setencoder(self, ui, name): |
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|
916 """Set the encoder for this stream. |
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|
917 |
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918 Receives the stream profile name. |
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|
919 """ |
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|
920 if name not in STREAM_ENCODERS: |
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921 raise error.Abort(_(b'unknown stream encoder: %s') % name) |
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|
922 |
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|
923 self._encoder = STREAM_ENCODERS[name][0](ui) |
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924 self._encodername = name |
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|
925 |
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|
926 def encode(self, data): |
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|
927 if not self._encoder: |
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|
928 return data |
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|
929 |
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|
930 return self._encoder.encode(data) |
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|
931 |
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|
932 def flush(self): |
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|
933 if not self._encoder: |
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|
934 return b'' |
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|
935 |
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|
936 return self._encoder.flush() |
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|
937 |
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|
938 def finish(self): |
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|
939 if not self._encoder: |
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|
940 return b'' |
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|
941 |
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|
942 self._encoder.finish() |
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|
943 |
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944 def makeframe(self, requestid, typeid, flags, payload, encoded=False): |
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|
945 """Create a frame to be sent out over this stream. |
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|
946 |
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|
947 Only returns the frame instance. Does not actually send it. |
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|
948 """ |
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|
949 streamflags = 0 |
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|
950 if not self._active: |
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|
951 streamflags |= STREAM_FLAG_BEGIN_STREAM |
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952 self._active = True |
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|
953 |
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|
954 if encoded: |
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|
955 if not self.streamsettingssent: |
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|
956 raise error.ProgrammingError( |
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|
957 b'attempting to send encoded frame without sending stream ' |
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|
958 b'settings' |
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|
959 ) |
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|
960 |
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|
961 streamflags |= STREAM_FLAG_ENCODING_APPLIED |
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|
962 |
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|
963 if ( |
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964 typeid == FRAME_TYPE_STREAM_SETTINGS |
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965 and flags & FLAG_STREAM_ENCODING_SETTINGS_EOS |
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966 ): |
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967 self.streamsettingssent = True |
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968 |
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969 return makeframe( |
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970 requestid, self.streamid, streamflags, typeid, flags, payload |
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971 ) |
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972 |
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973 def makestreamsettingsframe(self, requestid): |
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974 """Create a stream settings frame for this stream. |
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975 |
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976 Returns frame data or None if no stream settings frame is needed or has |
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977 already been sent. |
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978 """ |
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979 if not self._encoder or self.streamsettingssent: |
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980 return None |
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981 |
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982 payload = b''.join(cborutil.streamencode(self._encodername)) |
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983 return self.makeframe( |
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984 requestid, |
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985 FRAME_TYPE_STREAM_SETTINGS, |
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986 FLAG_STREAM_ENCODING_SETTINGS_EOS, |
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987 payload, |
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988 ) |
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989 |
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990 |
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991 def ensureserverstream(stream): |
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992 if stream.streamid % 2: |
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993 raise error.ProgrammingError( |
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994 b'server should only write to even ' |
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995 b'numbered streams; %d is not even' % stream.streamid |
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996 ) |
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997 |
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998 |
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999 DEFAULT_PROTOCOL_SETTINGS = { |
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1000 b'contentencodings': [b'identity'], |
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1001 } |
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1002 |
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1003 |
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1004 class serverreactor(object): |
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1005 """Holds state of a server handling frame-based protocol requests. |
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1006 |
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1007 This class is the "brain" of the unified frame-based protocol server |
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1008 component. While the protocol is stateless from the perspective of |
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1009 requests/commands, something needs to track which frames have been |
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1010 received, what frames to expect, etc. This class is that thing. |
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1011 |
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1012 Instances are modeled as a state machine of sorts. Instances are also |
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1013 reactionary to external events. The point of this class is to encapsulate |
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1014 the state of the connection and the exchange of frames, not to perform |
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1015 work. Instead, callers tell this class when something occurs, like a |
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1016 frame arriving. If that activity is worthy of a follow-up action (say |
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1017 *run a command*), the return value of that handler will say so. |
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1018 |
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1019 I/O and CPU intensive operations are purposefully delegated outside of |
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1020 this class. |
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1021 |
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1022 Consumers are expected to tell instances when events occur. They do so by |
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1023 calling the various ``on*`` methods. These methods return a 2-tuple |
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1024 describing any follow-up action(s) to take. The first element is the |
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1025 name of an action to perform. The second is a data structure (usually |
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1026 a dict) specific to that action that contains more information. e.g. |
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1027 if the server wants to send frames back to the client, the data structure |
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1028 will contain a reference to those frames. |
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1029 |
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1030 Valid actions that consumers can be instructed to take are: |
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1031 |
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1032 sendframes |
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1033 Indicates that frames should be sent to the client. The ``framegen`` |
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1034 key contains a generator of frames that should be sent. The server |
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1035 assumes that all frames are sent to the client. |
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1036 |
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1037 error |
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1038 Indicates that an error occurred. Consumer should probably abort. |
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1039 |
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1040 runcommand |
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1041 Indicates that the consumer should run a wire protocol command. Details |
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1042 of the command to run are given in the data structure. |
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1043 |
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1044 wantframe |
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1045 Indicates that nothing of interest happened and the server is waiting on |
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1046 more frames from the client before anything interesting can be done. |
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1047 |
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1048 noop |
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1049 Indicates no additional action is required. |
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1050 |
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1051 Known Issues |
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1052 ------------ |
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1053 |
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1054 There are no limits to the number of partially received commands or their |
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1055 size. A malicious client could stream command request data and exhaust the |
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1056 server's memory. |
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1057 |
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1058 Partially received commands are not acted upon when end of input is |
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1059 reached. Should the server error if it receives a partial request? |
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1060 Should the client send a message to abort a partially transmitted request |
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1061 to facilitate graceful shutdown? |
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1062 |
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1063 Active requests that haven't been responded to aren't tracked. This means |
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1064 that if we receive a command and instruct its dispatch, another command |
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1065 with its request ID can come in over the wire and there will be a race |
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1066 between who responds to what. |
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1067 """ |
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1068 |
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1069 def __init__(self, ui, deferoutput=False): |
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1070 """Construct a new server reactor. |
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1071 |
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1072 ``deferoutput`` can be used to indicate that no output frames should be |
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1073 instructed to be sent until input has been exhausted. In this mode, |
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1074 events that would normally generate output frames (such as a command |
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1075 response being ready) will instead defer instructing the consumer to |
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1076 send those frames. This is useful for half-duplex transports where the |
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1077 sender cannot receive until all data has been transmitted. |
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1078 """ |
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1079 self._ui = ui |
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1080 self._deferoutput = deferoutput |
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1081 self._state = b'initial' |
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1082 self._nextoutgoingstreamid = 2 |
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1083 self._bufferedframegens = [] |
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1084 # stream id -> stream instance for all active streams from the client. |
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1085 self._incomingstreams = {} |
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1086 self._outgoingstreams = {} |
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1087 # request id -> dict of commands that are actively being received. |
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1088 self._receivingcommands = {} |
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1089 # Request IDs that have been received and are actively being processed. |
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1090 # Once all output for a request has been sent, it is removed from this |
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1091 # set. |
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1092 self._activecommands = set() |
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1093 |
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1094 self._protocolsettingsdecoder = None |
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1095 |
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1096 # Sender protocol settings are optional. Set implied default values. |
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1097 self._sendersettings = dict(DEFAULT_PROTOCOL_SETTINGS) |
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1098 |
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1099 populatestreamencoders() |
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1100 |
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1101 def onframerecv(self, frame): |
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1102 """Process a frame that has been received off the wire. |
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1103 |
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1104 Returns a dict with an ``action`` key that details what action, |
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1105 if any, the consumer should take next. |
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1106 """ |
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1107 if not frame.streamid % 2: |
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1108 self._state = b'errored' |
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1109 return self._makeerrorresult( |
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1110 _(b'received frame with even numbered stream ID: %d') |
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1111 % frame.streamid |
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1112 ) |
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1113 |
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1114 if frame.streamid not in self._incomingstreams: |
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1115 if not frame.streamflags & STREAM_FLAG_BEGIN_STREAM: |
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1116 self._state = b'errored' |
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1117 return self._makeerrorresult( |
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1118 _( |
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1119 b'received frame on unknown inactive stream without ' |
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1120 b'beginning of stream flag set' |
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1121 ) |
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1122 ) |
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1123 |
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1124 self._incomingstreams[frame.streamid] = inputstream(frame.streamid) |
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1125 |
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1126 if frame.streamflags & STREAM_FLAG_ENCODING_APPLIED: |
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1127 # TODO handle decoding frames |
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1128 self._state = b'errored' |
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1129 raise error.ProgrammingError( |
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1130 b'support for decoding stream payloads not yet implemented' |
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1131 ) |
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1132 |
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1133 if frame.streamflags & STREAM_FLAG_END_STREAM: |
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1134 del self._incomingstreams[frame.streamid] |
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1135 |
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1136 handlers = { |
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1137 b'initial': self._onframeinitial, |
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1138 b'protocol-settings-receiving': self._onframeprotocolsettings, |
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1139 b'idle': self._onframeidle, |
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1140 b'command-receiving': self._onframecommandreceiving, |
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1141 b'errored': self._onframeerrored, |
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1142 } |
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1143 |
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1144 meth = handlers.get(self._state) |
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1145 if not meth: |
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|
1146 raise error.ProgrammingError(b'unhandled state: %s' % self._state) |
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1147 |
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|
1148 return meth(frame) |
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1149 |
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1150 def oncommandresponsereadyobjects(self, stream, requestid, objs): |
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1151 """Signal that objects are ready to be sent to the client. |
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1152 |
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1153 ``objs`` is an iterable of objects (typically a generator) that will |
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1154 be encoded via CBOR and added to frames, which will be sent to the |
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1155 client. |
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|
1156 """ |
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|
1157 ensureserverstream(stream) |
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1158 |
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1159 # A more robust solution would be to check for objs.{next,__next__}. |
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1160 if isinstance(objs, list): |
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|
1161 objs = iter(objs) |
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1162 |
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1163 # We need to take care over exception handling. Uncaught exceptions |
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1164 # when generating frames could lead to premature end of the frame |
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1165 # stream and the possibility of the server or client process getting |
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1166 # in a bad state. |
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1167 # |
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1168 # Keep in mind that if ``objs`` is a generator, advancing it could |
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1169 # raise exceptions that originated in e.g. wire protocol command |
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1170 # functions. That is why we differentiate between exceptions raised |
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1171 # when iterating versus other exceptions that occur. |
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1172 # |
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1173 # In all cases, when the function finishes, the request is fully |
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1174 # handled and no new frames for it should be seen. |
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1175 |
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|
1176 def sendframes(): |
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1177 emitted = False |
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1178 alternatelocationsent = False |
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1179 emitter = bufferingcommandresponseemitter(stream, requestid) |
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1180 while True: |
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1181 try: |
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1182 o = next(objs) |
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1183 except StopIteration: |
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1184 for frame in emitter.send(None): |
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1185 yield frame |
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1186 |
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1187 if emitted: |
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|
1188 for frame in createcommandresponseeosframes( |
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1189 stream, requestid |
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1190 ): |
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1191 yield frame |
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1192 break |
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|
1193 |
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1194 except error.WireprotoCommandError as e: |
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1195 for frame in createcommanderrorresponse( |
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|
1196 stream, requestid, e.message, e.messageargs |
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1197 ): |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1198 yield frame |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1199 break |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1200 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1201 except Exception as e: |
39838
bce1c1af7518
py3: cast exception to bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39560
diff
changeset
|
1202 for frame in createerrorframe( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1203 stream, |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1204 requestid, |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1205 b'%s' % stringutil.forcebytestr(e), |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1206 errtype=b'server', |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1207 ): |
39838
bce1c1af7518
py3: cast exception to bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39560
diff
changeset
|
1208 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1209 yield frame |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1210 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1211 break |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1212 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1213 try: |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1214 # Alternate location responses can only be the first and |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1215 # only object in the output stream. |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1216 if isinstance(o, wireprototypes.alternatelocationresponse): |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1217 if emitted: |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1218 raise error.ProgrammingError( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1219 b'alternatelocationresponse seen after initial ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1220 b'output object' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1221 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1222 |
40138
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1223 frame = stream.makestreamsettingsframe(requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1224 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1225 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1226 |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1227 yield createalternatelocationresponseframe( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1228 stream, requestid, o |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1229 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1230 |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1231 alternatelocationsent = True |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1232 emitted = True |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1233 continue |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1234 |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1235 if alternatelocationsent: |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1236 raise error.ProgrammingError( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1237 b'object follows alternatelocationresponse' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1238 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1239 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1240 if not emitted: |
40138
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1241 # Frame is optional. |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1242 frame = stream.makestreamsettingsframe(requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1243 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1244 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1245 |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1246 # May be None if empty frame (due to encoding). |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1247 frame = createcommandresponseokframe(stream, requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1248 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1249 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1250 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1251 emitted = True |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1252 |
40020
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1253 # Objects emitted by command functions can be serializable |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1254 # data structures or special types. |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1255 # TODO consider extracting the content normalization to a |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1256 # standalone function, as it may be useful for e.g. cachers. |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1257 |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1258 # A pre-encoded object is sent directly to the emitter. |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1259 if isinstance(o, wireprototypes.encodedresponse): |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1260 for frame in emitter.send(o.data): |
39560
84bf6ded9317
wireprotoframing: buffer emitted data to reduce frame count
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39559
diff
changeset
|
1261 yield frame |
84bf6ded9317
wireprotoframing: buffer emitted data to reduce frame count
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39559
diff
changeset
|
1262 |
40328
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1263 elif isinstance( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1264 o, wireprototypes.indefinitebytestringresponse |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1265 ): |
40328
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1266 for chunk in cborutil.streamencodebytestringfromiter( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1267 o.chunks |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1268 ): |
40328
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1269 |
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1270 for frame in emitter.send(chunk): |
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1271 yield frame |
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1272 |
40020
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1273 # A regular object is CBOR encoded. |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1274 else: |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1275 for chunk in cborutil.streamencode(o): |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1276 for frame in emitter.send(chunk): |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1277 yield frame |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1278 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1279 except Exception as e: |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1280 for frame in createerrorframe( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1281 stream, requestid, b'%s' % e, errtype=b'server' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1282 ): |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1283 yield frame |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1284 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1285 break |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1286 |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1287 self._activecommands.remove(requestid) |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1288 |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1289 return self._handlesendframes(sendframes()) |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1290 |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1291 def oninputeof(self): |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1292 """Signals that end of input has been received. |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1293 |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1294 No more frames will be received. All pending activity should be |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1295 completed. |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1296 """ |
37058
c5e9c3b47366
wireproto: support for receiving multiple requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37057
diff
changeset
|
1297 # TODO should we do anything about in-flight commands? |
c5e9c3b47366
wireproto: support for receiving multiple requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37057
diff
changeset
|
1298 |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1299 if not self._deferoutput or not self._bufferedframegens: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1300 return b'noop', {} |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1301 |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1302 # If we buffered all our responses, emit those. |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1303 def makegen(): |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1304 for gen in self._bufferedframegens: |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1305 for frame in gen: |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1306 yield frame |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1307 |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1308 return b'sendframes', { |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1309 b'framegen': makegen(), |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1310 } |
37055
61393f888dfe
wireproto: define and implement responses in framing protocol
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37052
diff
changeset
|
1311 |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1312 def _handlesendframes(self, framegen): |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1313 if self._deferoutput: |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1314 self._bufferedframegens.append(framegen) |
43077
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1315 return b'noop', {} |
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|
1316 else: |
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|
1317 return b'sendframes', { |
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|
1318 b'framegen': framegen, |
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|
1319 } |
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|
1320 |
37726
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
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|
1321 def onservererror(self, stream, requestid, msg): |
37288
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|
1322 ensureserverstream(stream) |
9bfcbe4f4745
wireproto: add streams to frame-based protocol
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|
1323 |
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|
1324 def sendframes(): |
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|
1325 for frame in createerrorframe( |
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|
1326 stream, requestid, msg, errtype=b'server' |
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|
1327 ): |
37728
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|
1328 yield frame |
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|
1329 |
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|
1330 self._activecommands.remove(requestid) |
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|
1331 |
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|
1332 return self._handlesendframes(sendframes()) |
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|
1333 |
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|
1334 def oncommanderror(self, stream, requestid, message, args=None): |
564a3eec6e63
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parents:
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|
1335 """Called when a command encountered an error before sending output.""" |
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|
1336 ensureserverstream(stream) |
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|
1337 |
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1338 def sendframes(): |
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|
1339 for frame in createcommanderrorresponse( |
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|
1340 stream, requestid, message, args |
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|
1341 ): |
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1342 yield frame |
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|
1343 |
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|
1344 self._activecommands.remove(requestid) |
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|
1345 |
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|
1346 return self._handlesendframes(sendframes()) |
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wireproto: define and implement responses in framing protocol
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|
1347 |
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|
1348 def makeoutputstream(self): |
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1349 """Create a stream to be used for sending data to the client. |
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|
1350 |
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|
1351 If this is called before protocol settings frames are received, we |
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1352 don't know what stream encodings are supported by the client and |
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1353 we will default to identity. |
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|
1354 """ |
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1355 streamid = self._nextoutgoingstreamid |
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|
1356 self._nextoutgoingstreamid += 2 |
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|
1357 |
40130
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40129
diff
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|
1358 s = outputstream(streamid) |
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|
1359 self._outgoingstreams[streamid] = s |
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|
1360 |
40138
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|
1361 # Always use the *server's* preferred encoder over the client's, |
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|
1362 # as servers have more to lose from sub-optimal encoders being used. |
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|
1363 for name in STREAM_ENCODERS_ORDER: |
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|
1364 if name in self._sendersettings[b'contentencodings']: |
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|
1365 s.setencoder(self._ui, name) |
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|
1366 break |
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|
1367 |
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|
1368 return s |
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|
1369 |
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|
1370 def _makeerrorresult(self, msg): |
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1371 return b'error', { |
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1372 b'message': msg, |
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1373 } |
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|
1374 |
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|
1375 def _makeruncommandresult(self, requestid): |
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1376 entry = self._receivingcommands[requestid] |
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1377 |
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1378 if not entry[b'requestdone']: |
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1379 self._state = b'errored' |
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|
1380 raise error.ProgrammingError( |
43117
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cleanup: join string literals that are already on one line
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|
1381 b'should not be called without requestdone set' |
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1382 ) |
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|
1383 |
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|
1384 del self._receivingcommands[requestid] |
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|
1385 |
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|
1386 if self._receivingcommands: |
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|
1387 self._state = b'command-receiving' |
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1388 else: |
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|
1389 self._state = b'idle' |
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|
1390 |
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1391 # Decode the payloads as CBOR. |
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1392 entry[b'payload'].seek(0) |
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|
1393 request = cborutil.decodeall(entry[b'payload'].getvalue())[0] |
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|
1394 |
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|
1395 if b'name' not in request: |
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1396 self._state = b'errored' |
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|
1397 return self._makeerrorresult( |
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|
1398 _(b'command request missing "name" field') |
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1399 ) |
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|
1400 |
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|
1401 if b'args' not in request: |
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|
1402 request[b'args'] = {} |
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|
1403 |
37063
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|
1404 assert requestid not in self._activecommands |
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|
1405 self._activecommands.add(requestid) |
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1406 |
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1407 return ( |
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1408 b'runcommand', |
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1409 { |
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1410 b'requestid': requestid, |
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1411 b'command': request[b'name'], |
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1412 b'args': request[b'args'], |
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1413 b'redirect': request.get(b'redirect'), |
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1414 b'data': entry[b'data'].getvalue() if entry[b'data'] else None, |
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1415 }, |
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1416 ) |
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1417 |
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|
1418 def _makewantframeresult(self): |
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|
1419 return b'wantframe', { |
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|
1420 b'state': self._state, |
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|
1421 } |
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|
1422 |
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|
1423 def _validatecommandrequestframe(self, frame): |
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|
1424 new = frame.flags & FLAG_COMMAND_REQUEST_NEW |
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|
1425 continuation = frame.flags & FLAG_COMMAND_REQUEST_CONTINUATION |
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1426 |
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|
1427 if new and continuation: |
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|
1428 self._state = b'errored' |
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|
1429 return self._makeerrorresult( |
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diff
changeset
|
1430 _( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1431 b'received command request frame with both new and ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1432 b'continuation flags set' |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1433 ) |
2372284d9457
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parents:
40328
diff
changeset
|
1434 ) |
37292
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1435 |
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1436 if not new and not continuation: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1437 self._state = b'errored' |
37292
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1438 return self._makeerrorresult( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1439 _( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1440 b'received command request frame with neither new nor ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1441 b'continuation flags set' |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1442 ) |
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1443 ) |
37292
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1444 |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1445 def _onframeinitial(self, frame): |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1446 # Called when we receive a frame when in the "initial" state. |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1447 if frame.typeid == FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1448 self._state = b'protocol-settings-receiving' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1449 self._protocolsettingsdecoder = cborutil.bufferingdecoder() |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1450 return self._onframeprotocolsettings(frame) |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1451 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1452 elif frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1453 self._state = b'idle' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1454 return self._onframeidle(frame) |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1455 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1456 else: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1457 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1458 return self._makeerrorresult( |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1459 _( |
43077
687b865b95ad
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parents:
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diff
changeset
|
1460 b'expected sender protocol settings or command request ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
43076
diff
changeset
|
1461 b'frame; got %d' |
43076
2372284d9457
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parents:
40328
diff
changeset
|
1462 ) |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1463 % frame.typeid |
2372284d9457
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parents:
40328
diff
changeset
|
1464 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1465 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1466 def _onframeprotocolsettings(self, frame): |
43077
687b865b95ad
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parents:
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diff
changeset
|
1467 assert self._state == b'protocol-settings-receiving' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1468 assert self._protocolsettingsdecoder is not None |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1469 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1470 if frame.typeid != FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: |
43077
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1471 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1472 return self._makeerrorresult( |
43077
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parents:
43076
diff
changeset
|
1473 _(b'expected sender protocol settings frame; got %d') |
43076
2372284d9457
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parents:
40328
diff
changeset
|
1474 % frame.typeid |
2372284d9457
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parents:
40328
diff
changeset
|
1475 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1476 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1477 more = frame.flags & FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1478 eos = frame.flags & FLAG_SENDER_PROTOCOL_SETTINGS_EOS |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1479 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1480 if more and eos: |
43077
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parents:
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diff
changeset
|
1481 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1482 return self._makeerrorresult( |
43076
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parents:
40328
diff
changeset
|
1483 _( |
43077
687b865b95ad
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parents:
43076
diff
changeset
|
1484 b'sender protocol settings frame cannot have both ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1485 b'continuation and end of stream flags set' |
43076
2372284d9457
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parents:
40328
diff
changeset
|
1486 ) |
2372284d9457
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parents:
40328
diff
changeset
|
1487 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1488 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1489 if not more and not eos: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
43076
diff
changeset
|
1490 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1491 return self._makeerrorresult( |
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2372284d9457
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parents:
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diff
changeset
|
1492 _( |
43077
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1493 b'sender protocol settings frame must have continuation or ' |
687b865b95ad
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parents:
43076
diff
changeset
|
1494 b'end of stream flag set' |
43076
2372284d9457
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parents:
40328
diff
changeset
|
1495 ) |
2372284d9457
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parents:
40328
diff
changeset
|
1496 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1497 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1498 # TODO establish limits for maximum amount of data that can be |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1499 # buffered. |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1500 try: |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1501 self._protocolsettingsdecoder.decode(frame.payload) |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1502 except Exception as e: |
43077
687b865b95ad
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parents:
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diff
changeset
|
1503 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1504 return self._makeerrorresult( |
43077
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parents:
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diff
changeset
|
1505 _( |
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1506 b'error decoding CBOR from sender protocol settings frame: %s' |
687b865b95ad
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parents:
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|
1507 ) |
43076
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diff
changeset
|
1508 % stringutil.forcebytestr(e) |
2372284d9457
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40328
diff
changeset
|
1509 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
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parents:
40125
diff
changeset
|
1510 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1511 if more: |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1512 return self._makewantframeresult() |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1513 |
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1514 assert eos |
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1515 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
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parents:
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diff
changeset
|
1516 decoded = self._protocolsettingsdecoder.getavailable() |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1517 self._protocolsettingsdecoder = None |
327d40b94bed
wireprotov2: handle sender protocol settings frames
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parents:
40125
diff
changeset
|
1518 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
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diff
changeset
|
1519 if not decoded: |
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diff
changeset
|
1520 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1521 return self._makeerrorresult( |
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changeset
|
1522 _(b'sender protocol settings frame did not contain CBOR data') |
43076
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changeset
|
1523 ) |
40126
327d40b94bed
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40125
diff
changeset
|
1524 elif len(decoded) > 1: |
43077
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parents:
43076
diff
changeset
|
1525 self._state = b'errored' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
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parents:
40125
diff
changeset
|
1526 return self._makeerrorresult( |
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changeset
|
1527 _( |
43077
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parents:
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changeset
|
1528 b'sender protocol settings frame contained multiple CBOR ' |
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changeset
|
1529 b'values' |
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changeset
|
1530 ) |
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changeset
|
1531 ) |
40126
327d40b94bed
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40125
diff
changeset
|
1532 |
327d40b94bed
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40125
diff
changeset
|
1533 d = decoded[0] |
327d40b94bed
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changeset
|
1534 |
327d40b94bed
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changeset
|
1535 if b'contentencodings' in d: |
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changeset
|
1536 self._sendersettings[b'contentencodings'] = d[b'contentencodings'] |
40126
327d40b94bed
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changeset
|
1537 |
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diff
changeset
|
1538 self._state = b'idle' |
40126
327d40b94bed
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40125
diff
changeset
|
1539 |
327d40b94bed
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diff
changeset
|
1540 return self._makewantframeresult() |
327d40b94bed
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40125
diff
changeset
|
1541 |
37061
884a0c1604ad
wireproto: define attr-based classes for representing frames
Gregory Szorc <gregory.szorc@gmail.com>
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37060
diff
changeset
|
1542 def _onframeidle(self, frame): |
37052
8c3c47362934
wireproto: implement basic frame reading and processing
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parents:
37051
diff
changeset
|
1543 # The only frame type that should be received in this state is a |
8c3c47362934
wireproto: implement basic frame reading and processing
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parents:
37051
diff
changeset
|
1544 # command request. |
37292
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1545 if frame.typeid != FRAME_TYPE_COMMAND_REQUEST: |
43077
687b865b95ad
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diff
changeset
|
1546 self._state = b'errored' |
37052
8c3c47362934
wireproto: implement basic frame reading and processing
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37051
diff
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|
1547 return self._makeerrorresult( |
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|
1548 _(b'expected command request frame; got %d') % frame.typeid |
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|
1549 ) |
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|
1550 |
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|
1551 res = self._validatecommandrequestframe(frame) |
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
1552 if res: |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
1553 return res |
37052
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
1554 |
37061
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|
1555 if frame.requestid in self._receivingcommands: |
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|
1556 self._state = b'errored' |
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|
1557 return self._makeerrorresult( |
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|
1558 _(b'request with ID %d already received') % frame.requestid |
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|
1559 ) |
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|
1560 |
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|
1561 if frame.requestid in self._activecommands: |
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|
1562 self._state = b'errored' |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
1563 return self._makeerrorresult( |
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|
1564 _(b'request with ID %d is already active') % frame.requestid |
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|
1565 ) |
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|
1566 |
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|
1567 new = frame.flags & FLAG_COMMAND_REQUEST_NEW |
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|
1568 moreframes = frame.flags & FLAG_COMMAND_REQUEST_MORE_FRAMES |
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|
1569 expectingdata = frame.flags & FLAG_COMMAND_REQUEST_EXPECT_DATA |
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|
1570 |
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|
1571 if not new: |
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|
1572 self._state = b'errored' |
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|
1573 return self._makeerrorresult( |
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|
1574 _(b'received command request frame without new flag set') |
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|
1575 ) |
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|
1576 |
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|
1577 payload = util.bytesio() |
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|
1578 payload.write(frame.payload) |
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|
1579 |
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|
1580 self._receivingcommands[frame.requestid] = { |
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|
1581 b'payload': payload, |
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1582 b'data': None, |
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|
1583 b'requestdone': not moreframes, |
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|
1584 b'expectingdata': bool(expectingdata), |
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|
1585 } |
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|
1586 |
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|
1587 # This is the final frame for this request. Dispatch it. |
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|
1588 if not moreframes and not expectingdata: |
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|
1589 return self._makeruncommandresult(frame.requestid) |
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|
1590 |
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|
1591 assert moreframes or expectingdata |
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|
1592 self._state = b'command-receiving' |
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|
1593 return self._makewantframeresult() |
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|
1594 |
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|
1595 def _onframecommandreceiving(self, frame): |
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|
1596 if frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
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|
1597 # Process new command requests as such. |
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|
1598 if frame.flags & FLAG_COMMAND_REQUEST_NEW: |
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|
1599 return self._onframeidle(frame) |
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|
1600 |
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|
1601 res = self._validatecommandrequestframe(frame) |
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|
1602 if res: |
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|
1603 return res |
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|
1604 |
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|
1605 # All other frames should be related to a command that is currently |
37063
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|
1606 # receiving but is not active. |
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|
1607 if frame.requestid in self._activecommands: |
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|
1608 self._state = b'errored' |
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|
1609 return self._makeerrorresult( |
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|
1610 _(b'received frame for request that is still active: %d') |
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|
1611 % frame.requestid |
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|
1612 ) |
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|
1613 |
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|
1614 if frame.requestid not in self._receivingcommands: |
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|
1615 self._state = b'errored' |
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|
1616 return self._makeerrorresult( |
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|
1617 _(b'received frame for request that is not receiving: %d') |
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|
1618 % frame.requestid |
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|
1619 ) |
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|
1620 |
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|
1621 entry = self._receivingcommands[frame.requestid] |
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|
1622 |
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|
1623 if frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
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|
1624 moreframes = frame.flags & FLAG_COMMAND_REQUEST_MORE_FRAMES |
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|
1625 expectingdata = bool(frame.flags & FLAG_COMMAND_REQUEST_EXPECT_DATA) |
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|
1626 |
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|
1627 if entry[b'requestdone']: |
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|
1628 self._state = b'errored' |
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|
1629 return self._makeerrorresult( |
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|
1630 _( |
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|
1631 b'received command request frame when request frames ' |
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|
1632 b'were supposedly done' |
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|
1633 ) |
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|
1634 ) |
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|
1635 |
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|
1636 if expectingdata != entry[b'expectingdata']: |
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|
1637 self._state = b'errored' |
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|
1638 return self._makeerrorresult( |
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|
1639 _(b'mismatch between expect data flag and previous frame') |
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1640 ) |
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|
1641 |
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|
1642 entry[b'payload'].write(frame.payload) |
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|
1643 |
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|
1644 if not moreframes: |
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|
1645 entry[b'requestdone'] = True |
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|
1646 |
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|
1647 if not moreframes and not expectingdata: |
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|
1648 return self._makeruncommandresult(frame.requestid) |
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|
1649 |
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|
1650 return self._makewantframeresult() |
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|
1651 |
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|
1652 elif frame.typeid == FRAME_TYPE_COMMAND_DATA: |
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|
1653 if not entry[b'expectingdata']: |
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|
1654 self._state = b'errored' |
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|
1655 return self._makeerrorresult( |
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|
1656 _( |
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|
1657 b'received command data frame for request that is not ' |
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|
1658 b'expecting data: %d' |
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|
1659 ) |
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changeset
|
1660 % frame.requestid |
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1661 ) |
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1662 |
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1663 if entry[b'data'] is None: |
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1664 entry[b'data'] = util.bytesio() |
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1665 |
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1666 return self._handlecommanddataframe(frame, entry) |
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1667 else: |
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1668 self._state = b'errored' |
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1669 return self._makeerrorresult( |
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1670 _(b'received unexpected frame type: %d') % frame.typeid |
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1671 ) |
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1672 |
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1673 def _handlecommanddataframe(self, frame, entry): |
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1674 assert frame.typeid == FRAME_TYPE_COMMAND_DATA |
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1675 |
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1676 # TODO support streaming data instead of buffering it. |
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1677 entry[b'data'].write(frame.payload) |
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1678 |
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1679 if frame.flags & FLAG_COMMAND_DATA_CONTINUATION: |
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1680 return self._makewantframeresult() |
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1681 elif frame.flags & FLAG_COMMAND_DATA_EOS: |
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1682 entry[b'data'].seek(0) |
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1683 return self._makeruncommandresult(frame.requestid) |
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1684 else: |
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1685 self._state = b'errored' |
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1686 return self._makeerrorresult(_(b'command data frame without flags')) |
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1687 |
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1688 def _onframeerrored(self, frame): |
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1689 return self._makeerrorresult(_(b'server already errored')) |
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1690 |
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1691 |
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1692 class commandrequest(object): |
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1693 """Represents a request to run a command.""" |
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1694 |
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1695 def __init__(self, requestid, name, args, datafh=None, redirect=None): |
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1696 self.requestid = requestid |
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1697 self.name = name |
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1698 self.args = args |
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1699 self.datafh = datafh |
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1700 self.redirect = redirect |
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1701 self.state = b'pending' |
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1702 |
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1703 |
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1704 class clientreactor(object): |
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1705 """Holds state of a client issuing frame-based protocol requests. |
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1706 |
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1707 This is like ``serverreactor`` but for client-side state. |
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1708 |
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1709 Each instance is bound to the lifetime of a connection. For persistent |
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1710 connection transports using e.g. TCP sockets and speaking the raw |
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1711 framing protocol, there will be a single instance for the lifetime of |
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1712 the TCP socket. For transports where there are multiple discrete |
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1713 interactions (say tunneled within in HTTP request), there will be a |
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1714 separate instance for each distinct interaction. |
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1715 |
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1716 Consumers are expected to tell instances when events occur by calling |
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1717 various methods. These methods return a 2-tuple describing any follow-up |
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1718 action(s) to take. The first element is the name of an action to |
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1719 perform. The second is a data structure (usually a dict) specific to |
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1720 that action that contains more information. e.g. if the reactor wants |
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1721 to send frames to the server, the data structure will contain a reference |
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1722 to those frames. |
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1723 |
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1724 Valid actions that consumers can be instructed to take are: |
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1725 |
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1726 noop |
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1727 Indicates no additional action is required. |
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1728 |
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1729 sendframes |
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1730 Indicates that frames should be sent to the server. The ``framegen`` |
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1731 key contains a generator of frames that should be sent. The reactor |
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1732 assumes that all frames in this generator are sent to the server. |
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1733 |
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1734 error |
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1735 Indicates that an error occurred. The ``message`` key contains an |
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1736 error message describing the failure. |
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1737 |
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1738 responsedata |
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1739 Indicates a response to a previously-issued command was received. |
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1740 |
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1741 The ``request`` key contains the ``commandrequest`` instance that |
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1742 represents the request this data is for. |
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1743 |
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1744 The ``data`` key contains the decoded data from the server. |
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1745 |
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1746 ``expectmore`` and ``eos`` evaluate to True when more response data |
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1747 is expected to follow or we're at the end of the response stream, |
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1748 respectively. |
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1749 """ |
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1750 |
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1751 def __init__( |
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1752 self, |
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1753 ui, |
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1754 hasmultiplesend=False, |
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1755 buffersends=True, |
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1756 clientcontentencoders=None, |
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1757 ): |
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1758 """Create a new instance. |
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1759 |
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1760 ``hasmultiplesend`` indicates whether multiple sends are supported |
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1761 by the transport. When True, it is possible to send commands immediately |
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1762 instead of buffering until the caller signals an intent to finish a |
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1763 send operation. |
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1764 |
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1765 ``buffercommands`` indicates whether sends should be buffered until the |
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1766 last request has been issued. |
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1767 |
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1768 ``clientcontentencoders`` is an iterable of content encoders the client |
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1769 will advertise to the server and that the server can use for encoding |
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1770 data. If not defined, the client will not advertise content encoders |
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1771 to the server. |
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1772 """ |
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1773 self._ui = ui |
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1774 self._hasmultiplesend = hasmultiplesend |
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1775 self._buffersends = buffersends |
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1776 self._clientcontentencoders = clientcontentencoders |
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1777 |
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1778 self._canissuecommands = True |
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1779 self._cansend = True |
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1780 self._protocolsettingssent = False |
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1781 |
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1782 self._nextrequestid = 1 |
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1783 # We only support a single outgoing stream for now. |
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1784 self._outgoingstream = outputstream(1) |
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1785 self._pendingrequests = collections.deque() |
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1786 self._activerequests = {} |
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1787 self._incomingstreams = {} |
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1788 self._streamsettingsdecoders = {} |
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1789 |
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1790 populatestreamencoders() |
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1791 |
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1792 def callcommand(self, name, args, datafh=None, redirect=None): |
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1793 """Request that a command be executed. |
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1794 |
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1795 Receives the command name, a dict of arguments to pass to the command, |
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1796 and an optional file object containing the raw data for the command. |
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1797 |
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1798 Returns a 3-tuple of (request, action, action data). |
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1799 """ |
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1800 if not self._canissuecommands: |
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1801 raise error.ProgrammingError(b'cannot issue new commands') |
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1802 |
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1803 requestid = self._nextrequestid |
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1804 self._nextrequestid += 2 |
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1805 |
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1806 request = commandrequest( |
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1807 requestid, name, args, datafh=datafh, redirect=redirect |
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1808 ) |
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1809 |
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1810 if self._buffersends: |
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1811 self._pendingrequests.append(request) |
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1812 return request, b'noop', {} |
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1813 else: |
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1814 if not self._cansend: |
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1815 raise error.ProgrammingError( |
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1816 b'sends cannot be performed on this instance' |
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1817 ) |
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1818 |
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1819 if not self._hasmultiplesend: |
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1820 self._cansend = False |
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1821 self._canissuecommands = False |
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1822 |
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1823 return ( |
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1824 request, |
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1825 b'sendframes', |
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1826 { |
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1827 b'framegen': self._makecommandframes(request), |
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1828 }, |
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1829 ) |
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1830 |
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|
1831 def flushcommands(self): |
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1832 """Request that all queued commands be sent. |
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1833 |
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1834 If any commands are buffered, this will instruct the caller to send |
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1835 them over the wire. If no commands are buffered it instructs the client |
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1836 to no-op. |
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1837 |
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1838 If instances aren't configured for multiple sends, no new command |
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1839 requests are allowed after this is called. |
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1840 """ |
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1841 if not self._pendingrequests: |
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1842 return b'noop', {} |
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1843 |
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1844 if not self._cansend: |
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1845 raise error.ProgrammingError( |
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1846 b'sends cannot be performed on this instance' |
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1847 ) |
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|
1848 |
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|
1849 # If the instance only allows sending once, mark that we have fired |
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1850 # our one shot. |
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1851 if not self._hasmultiplesend: |
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1852 self._canissuecommands = False |
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1853 self._cansend = False |
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1854 |
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1855 def makeframes(): |
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1856 while self._pendingrequests: |
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1857 request = self._pendingrequests.popleft() |
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1858 for frame in self._makecommandframes(request): |
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1859 yield frame |
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|
1860 |
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1861 return b'sendframes', { |
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|
1862 b'framegen': makeframes(), |
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1863 } |
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1864 |
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1865 def _makecommandframes(self, request): |
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1866 """Emit frames to issue a command request. |
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1867 |
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1868 As a side-effect, update request accounting to reflect its changed |
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1869 state. |
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|
1870 """ |
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1871 self._activerequests[request.requestid] = request |
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1872 request.state = b'sending' |
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1873 |
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1874 if not self._protocolsettingssent and self._clientcontentencoders: |
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1875 self._protocolsettingssent = True |
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1876 |
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1877 payload = b''.join( |
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1878 cborutil.streamencode( |
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1879 { |
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1880 b'contentencodings': self._clientcontentencoders, |
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1881 } |
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1882 ) |
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1883 ) |
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1884 |
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|
1885 yield self._outgoingstream.makeframe( |
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1886 requestid=request.requestid, |
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1887 typeid=FRAME_TYPE_SENDER_PROTOCOL_SETTINGS, |
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|
1888 flags=FLAG_SENDER_PROTOCOL_SETTINGS_EOS, |
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1889 payload=payload, |
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1890 ) |
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1891 |
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1892 res = createcommandframes( |
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1893 self._outgoingstream, |
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1894 request.requestid, |
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1895 request.name, |
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1896 request.args, |
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1897 datafh=request.datafh, |
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formatting: blacken the codebase
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parents:
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diff
changeset
|
1898 redirect=request.redirect, |
2372284d9457
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parents:
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diff
changeset
|
1899 ) |
37543
01361be9e2dc
wireproto: introduce a reactor for client-side state
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37485
diff
changeset
|
1900 |
01361be9e2dc
wireproto: introduce a reactor for client-side state
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37485
diff
changeset
|
1901 for frame in res: |
01361be9e2dc
wireproto: introduce a reactor for client-side state
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37485
diff
changeset
|
1902 yield frame |
01361be9e2dc
wireproto: introduce a reactor for client-side state
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37485
diff
changeset
|
1903 |
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687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1904 request.state = b'sent' |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1905 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1906 def onframerecv(self, frame): |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1907 """Process a frame that has been received off the wire. |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
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diff
changeset
|
1908 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1909 Returns a 2-tuple of (action, meta) describing further action the |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1910 caller needs to take as a result of receiving this frame. |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1911 """ |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1912 if frame.streamid % 2: |
43076
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formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1913 return ( |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1914 b'error', |
43076
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1915 { |
43077
687b865b95ad
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parents:
43076
diff
changeset
|
1916 b'message': ( |
687b865b95ad
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parents:
43076
diff
changeset
|
1917 _(b'received frame with odd numbered stream ID: %d') |
43076
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parents:
40328
diff
changeset
|
1918 % frame.streamid |
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parents:
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diff
changeset
|
1919 ), |
2372284d9457
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parents:
40328
diff
changeset
|
1920 }, |
2372284d9457
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
1921 ) |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1922 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1923 if frame.streamid not in self._incomingstreams: |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1924 if not frame.streamflags & STREAM_FLAG_BEGIN_STREAM: |
43076
2372284d9457
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parents:
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diff
changeset
|
1925 return ( |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1926 b'error', |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1927 { |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1928 b'message': _( |
687b865b95ad
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parents:
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diff
changeset
|
1929 b'received frame on unknown stream ' |
687b865b95ad
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parents:
43076
diff
changeset
|
1930 b'without beginning of stream flag set' |
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diff
changeset
|
1931 ), |
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formatting: blacken the codebase
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parents:
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diff
changeset
|
1932 }, |
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parents:
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diff
changeset
|
1933 ) |
37544
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wireproto: client reactor support for receiving frames
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parents:
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changeset
|
1934 |
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changeset
|
1935 self._incomingstreams[frame.streamid] = inputstream(frame.streamid) |
37656
e6870bca1f47
wireprotoframing: record when new stream is encountered
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37655
diff
changeset
|
1936 |
40132
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1937 stream = self._incomingstreams[frame.streamid] |
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1938 |
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1939 # If the payload is encoded, ask the stream to decode it. We |
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1940 # merely substitute the decoded result into the frame payload as |
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1941 # if it had been transferred all along. |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1942 if frame.streamflags & STREAM_FLAG_ENCODING_APPLIED: |
40132
e67522413ca8
wireprotov2: define and use stream encoders
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40130
diff
changeset
|
1943 frame.payload = stream.decode(frame.payload) |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1944 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1945 if frame.streamflags & STREAM_FLAG_END_STREAM: |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1946 del self._incomingstreams[frame.streamid] |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1947 |
40128
57782791b7e9
wireprotov2: handle stream encoding settings frames
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parents:
40127
diff
changeset
|
1948 if frame.typeid == FRAME_TYPE_STREAM_SETTINGS: |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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parents:
40127
diff
changeset
|
1949 return self._onstreamsettingsframe(frame) |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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parents:
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diff
changeset
|
1950 |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1951 if frame.requestid not in self._activerequests: |
43076
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parents:
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diff
changeset
|
1952 return ( |
43077
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parents:
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diff
changeset
|
1953 b'error', |
43076
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parents:
40328
diff
changeset
|
1954 { |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1955 b'message': ( |
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1956 _(b'received frame for inactive request ID: %d') |
43076
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parents:
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diff
changeset
|
1957 % frame.requestid |
2372284d9457
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parents:
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diff
changeset
|
1958 ), |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1959 }, |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1960 ) |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1961 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
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parents:
37543
diff
changeset
|
1962 request = self._activerequests[frame.requestid] |
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parents:
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diff
changeset
|
1963 request.state = b'receiving' |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1964 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1965 handlers = { |
37724
deff7cf7eefd
wireprotov2: change frame type and name for command response
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37723
diff
changeset
|
1966 FRAME_TYPE_COMMAND_RESPONSE: self._oncommandresponseframe, |
37726
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
1967 FRAME_TYPE_ERROR_RESPONSE: self._onerrorresponseframe, |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1968 } |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1969 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1970 meth = handlers.get(frame.typeid) |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1971 if not meth: |
43076
2372284d9457
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1972 raise error.ProgrammingError( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1973 b'unhandled frame type: %d' % frame.typeid |
43076
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formatting: blacken the codebase
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parents:
40328
diff
changeset
|
1974 ) |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1975 |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1976 return meth(request, frame) |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
1977 |
40128
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1978 def _onstreamsettingsframe(self, frame): |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1979 assert frame.typeid == FRAME_TYPE_STREAM_SETTINGS |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1980 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1981 more = frame.flags & FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1982 eos = frame.flags & FLAG_STREAM_ENCODING_SETTINGS_EOS |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1983 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1984 if more and eos: |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1985 return ( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1986 b'error', |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1987 { |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1988 b'message': ( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1989 _( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1990 b'stream encoding settings frame cannot have both ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1991 b'continuation and end of stream flags set' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1992 ) |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1993 ), |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1994 }, |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1995 ) |
40128
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1996 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
1997 if not more and not eos: |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1998 return ( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1999 b'error', |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2000 { |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2001 b'message': _( |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2002 b'stream encoding settings frame must have ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2003 b'continuation or end of stream flag set' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2004 ), |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2005 }, |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2006 ) |
40128
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2007 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2008 if frame.streamid not in self._streamsettingsdecoders: |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2009 decoder = cborutil.bufferingdecoder() |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2010 self._streamsettingsdecoders[frame.streamid] = decoder |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2011 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2012 decoder = self._streamsettingsdecoders[frame.streamid] |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2013 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2014 try: |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2015 decoder.decode(frame.payload) |
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40127
diff
changeset
|
2016 except Exception as e: |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2017 return ( |
43077
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2018 b'error', |
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|
2019 { |
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parents:
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changeset
|
2020 b'message': ( |
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parents:
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changeset
|
2021 _( |
43077
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parents:
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|
2022 b'error decoding CBOR from stream encoding ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
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|
2023 b'settings frame: %s' |
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|
2024 ) |
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|
2025 % stringutil.forcebytestr(e) |
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|
2026 ), |
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|
2027 }, |
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|
2028 ) |
40128
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wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
2029 |
57782791b7e9
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|
2030 if more: |
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|
2031 return b'noop', {} |
40128
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parents:
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|
2032 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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2033 assert eos |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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|
2034 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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2035 decoded = decoder.getavailable() |
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2036 del self._streamsettingsdecoders[frame.streamid] |
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wireprotov2: handle stream encoding settings frames
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|
2037 |
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wireprotov2: handle stream encoding settings frames
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2038 if not decoded: |
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parents:
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2039 return ( |
43077
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parents:
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changeset
|
2040 b'error', |
43076
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|
2041 { |
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2042 b'message': _( |
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parents:
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|
2043 b'stream encoding settings frame did not contain ' |
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parents:
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|
2044 b'CBOR data' |
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|
2045 ), |
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|
2046 }, |
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|
2047 ) |
40128
57782791b7e9
wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
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changeset
|
2048 |
57782791b7e9
wireprotov2: handle stream encoding settings frames
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|
2049 try: |
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|
2050 self._incomingstreams[frame.streamid].setdecoder( |
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|
2051 self._ui, decoded[0], decoded[1:] |
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2052 ) |
40128
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parents:
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|
2053 except Exception as e: |
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2054 return ( |
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|
2055 b'error', |
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changeset
|
2056 { |
43077
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parents:
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|
2057 b'message': ( |
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parents:
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changeset
|
2058 _(b'error setting stream decoder: %s') |
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2059 % stringutil.forcebytestr(e) |
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|
2060 ), |
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|
2061 }, |
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|
2062 ) |
40128
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wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
2063 |
43077
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parents:
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diff
changeset
|
2064 return b'noop', {} |
40128
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wireprotov2: handle stream encoding settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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changeset
|
2065 |
37724
deff7cf7eefd
wireprotov2: change frame type and name for command response
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37723
diff
changeset
|
2066 def _oncommandresponseframe(self, request, frame): |
deff7cf7eefd
wireprotov2: change frame type and name for command response
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37723
diff
changeset
|
2067 if frame.flags & FLAG_COMMAND_RESPONSE_EOS: |
43077
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diff
changeset
|
2068 request.state = b'received' |
37544
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
2069 del self._activerequests[request.requestid] |
55b5ba8d4e68
wireproto: client reactor support for receiving frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37543
diff
changeset
|
2070 |
43076
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parents:
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|
2071 return ( |
43077
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parents:
43076
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changeset
|
2072 b'responsedata', |
43076
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parents:
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changeset
|
2073 { |
43077
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parents:
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changeset
|
2074 b'request': request, |
687b865b95ad
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parents:
43076
diff
changeset
|
2075 b'expectmore': frame.flags & FLAG_COMMAND_RESPONSE_CONTINUATION, |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2076 b'eos': frame.flags & FLAG_COMMAND_RESPONSE_EOS, |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2077 b'data': frame.payload, |
43076
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parents:
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changeset
|
2078 }, |
2372284d9457
formatting: blacken the codebase
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parents:
40328
diff
changeset
|
2079 ) |
37726
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2080 |
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2081 def _onerrorresponseframe(self, request, frame): |
43077
687b865b95ad
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
2082 request.state = b'errored' |
37726
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2083 del self._activerequests[request.requestid] |
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2084 |
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2085 # The payload should be a CBOR map. |
39446
36f487a332ad
wireprotoframing: use our CBOR module
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37728
diff
changeset
|
2086 m = cborutil.decodeall(frame.payload)[0] |
37726
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
2087 |
43076
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Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2088 return ( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2089 b'error', |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2090 { |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2091 b'request': request, |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2092 b'type': m[b'type'], |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2093 b'message': m[b'message'], |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
2094 }, |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
2095 ) |