Mercurial > hg
annotate mercurial/wireprotoframing.py @ 50375:29d7a5a8b8c6
crecord: switch a curses argument to bool to appease type checkers
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Wed, 01 Mar 2023 11:53:31 -0500 |
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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 |
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13 import collections |
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14 import struct |
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15 |
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16 from .i18n import _ |
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17 from .pycompat import getattr |
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18 from .thirdparty import attr |
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19 from . import ( |
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20 encoding, |
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21 error, |
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22 pycompat, |
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23 util, |
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24 wireprototypes, |
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25 ) |
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26 from .utils import ( |
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27 cborutil, |
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28 stringutil, |
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29 ) |
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30 |
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31 FRAME_HEADER_SIZE = 8 |
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32 DEFAULT_MAX_FRAME_SIZE = 32768 |
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33 |
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34 STREAM_FLAG_BEGIN_STREAM = 0x01 |
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35 STREAM_FLAG_END_STREAM = 0x02 |
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36 STREAM_FLAG_ENCODING_APPLIED = 0x04 |
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37 |
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38 STREAM_FLAGS = { |
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39 b'stream-begin': STREAM_FLAG_BEGIN_STREAM, |
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40 b'stream-end': STREAM_FLAG_END_STREAM, |
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41 b'encoded': STREAM_FLAG_ENCODING_APPLIED, |
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42 } |
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43 |
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44 FRAME_TYPE_COMMAND_REQUEST = 0x01 |
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45 FRAME_TYPE_COMMAND_DATA = 0x02 |
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46 FRAME_TYPE_COMMAND_RESPONSE = 0x03 |
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47 FRAME_TYPE_ERROR_RESPONSE = 0x05 |
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48 FRAME_TYPE_TEXT_OUTPUT = 0x06 |
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49 FRAME_TYPE_PROGRESS = 0x07 |
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50 FRAME_TYPE_SENDER_PROTOCOL_SETTINGS = 0x08 |
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51 FRAME_TYPE_STREAM_SETTINGS = 0x09 |
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52 |
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53 FRAME_TYPES = { |
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54 b'command-request': FRAME_TYPE_COMMAND_REQUEST, |
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55 b'command-data': FRAME_TYPE_COMMAND_DATA, |
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56 b'command-response': FRAME_TYPE_COMMAND_RESPONSE, |
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57 b'error-response': FRAME_TYPE_ERROR_RESPONSE, |
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58 b'text-output': FRAME_TYPE_TEXT_OUTPUT, |
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59 b'progress': FRAME_TYPE_PROGRESS, |
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60 b'sender-protocol-settings': FRAME_TYPE_SENDER_PROTOCOL_SETTINGS, |
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61 b'stream-settings': FRAME_TYPE_STREAM_SETTINGS, |
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62 } |
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63 |
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64 FLAG_COMMAND_REQUEST_NEW = 0x01 |
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65 FLAG_COMMAND_REQUEST_CONTINUATION = 0x02 |
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66 FLAG_COMMAND_REQUEST_MORE_FRAMES = 0x04 |
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67 FLAG_COMMAND_REQUEST_EXPECT_DATA = 0x08 |
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68 |
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69 FLAGS_COMMAND_REQUEST = { |
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70 b'new': FLAG_COMMAND_REQUEST_NEW, |
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71 b'continuation': FLAG_COMMAND_REQUEST_CONTINUATION, |
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72 b'more': FLAG_COMMAND_REQUEST_MORE_FRAMES, |
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73 b'have-data': FLAG_COMMAND_REQUEST_EXPECT_DATA, |
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74 } |
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75 |
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76 FLAG_COMMAND_DATA_CONTINUATION = 0x01 |
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77 FLAG_COMMAND_DATA_EOS = 0x02 |
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78 |
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79 FLAGS_COMMAND_DATA = { |
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80 b'continuation': FLAG_COMMAND_DATA_CONTINUATION, |
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81 b'eos': FLAG_COMMAND_DATA_EOS, |
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82 } |
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83 |
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84 FLAG_COMMAND_RESPONSE_CONTINUATION = 0x01 |
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85 FLAG_COMMAND_RESPONSE_EOS = 0x02 |
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86 |
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87 FLAGS_COMMAND_RESPONSE = { |
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88 b'continuation': FLAG_COMMAND_RESPONSE_CONTINUATION, |
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89 b'eos': FLAG_COMMAND_RESPONSE_EOS, |
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90 } |
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91 |
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92 FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION = 0x01 |
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93 FLAG_SENDER_PROTOCOL_SETTINGS_EOS = 0x02 |
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94 |
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95 FLAGS_SENDER_PROTOCOL_SETTINGS = { |
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96 b'continuation': FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION, |
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97 b'eos': FLAG_SENDER_PROTOCOL_SETTINGS_EOS, |
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98 } |
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99 |
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100 FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION = 0x01 |
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101 FLAG_STREAM_ENCODING_SETTINGS_EOS = 0x02 |
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102 |
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103 FLAGS_STREAM_ENCODING_SETTINGS = { |
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104 b'continuation': FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION, |
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105 b'eos': FLAG_STREAM_ENCODING_SETTINGS_EOS, |
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106 } |
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107 |
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108 # Maps frame types to their available flags. |
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109 FRAME_TYPE_FLAGS = { |
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110 FRAME_TYPE_COMMAND_REQUEST: FLAGS_COMMAND_REQUEST, |
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111 FRAME_TYPE_COMMAND_DATA: FLAGS_COMMAND_DATA, |
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112 FRAME_TYPE_COMMAND_RESPONSE: FLAGS_COMMAND_RESPONSE, |
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113 FRAME_TYPE_ERROR_RESPONSE: {}, |
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114 FRAME_TYPE_TEXT_OUTPUT: {}, |
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115 FRAME_TYPE_PROGRESS: {}, |
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116 FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: FLAGS_SENDER_PROTOCOL_SETTINGS, |
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117 FRAME_TYPE_STREAM_SETTINGS: FLAGS_STREAM_ENCODING_SETTINGS, |
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118 } |
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119 |
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120 ARGUMENT_RECORD_HEADER = struct.Struct('<HH') |
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121 |
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122 |
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123 def humanflags(mapping, value): |
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124 """Convert a numeric flags value to a human value, using a mapping table.""" |
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125 namemap = {v: k for k, v in mapping.items()} |
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126 flags = [] |
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127 val = 1 |
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128 while value >= val: |
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129 if value & val: |
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130 flags.append(namemap.get(val, b'<unknown 0x%02x>' % val)) |
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131 val <<= 1 |
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132 |
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133 return b'|'.join(flags) |
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134 |
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135 |
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136 @attr.s(slots=True) |
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137 class frameheader: |
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138 """Represents the data in a frame header.""" |
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139 |
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140 length = attr.ib() |
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141 requestid = attr.ib() |
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142 streamid = attr.ib() |
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143 streamflags = attr.ib() |
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144 typeid = attr.ib() |
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145 flags = attr.ib() |
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146 |
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147 |
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148 @attr.s(slots=True, repr=False) |
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149 class frame: |
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150 """Represents a parsed frame.""" |
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151 |
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152 requestid = attr.ib() |
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153 streamid = attr.ib() |
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154 streamflags = attr.ib() |
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155 typeid = attr.ib() |
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156 flags = attr.ib() |
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157 payload = attr.ib() |
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158 |
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159 @encoding.strmethod |
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160 def __repr__(self): |
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161 typename = b'<unknown 0x%02x>' % self.typeid |
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162 for name, value in FRAME_TYPES.items(): |
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163 if value == self.typeid: |
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164 typename = name |
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165 break |
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166 |
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167 return ( |
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168 b'frame(size=%d; request=%d; stream=%d; streamflags=%s; ' |
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169 b'type=%s; flags=%s)' |
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170 % ( |
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171 len(self.payload), |
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172 self.requestid, |
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173 self.streamid, |
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174 humanflags(STREAM_FLAGS, self.streamflags), |
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175 typename, |
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176 humanflags(FRAME_TYPE_FLAGS.get(self.typeid, {}), self.flags), |
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177 ) |
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178 ) |
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179 |
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180 |
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181 def makeframe(requestid, streamid, streamflags, typeid, flags, payload): |
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182 """Assemble a frame into a byte array.""" |
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183 # TODO assert size of payload. |
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184 frame = bytearray(FRAME_HEADER_SIZE + len(payload)) |
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185 |
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186 # 24 bits length |
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187 # 16 bits request id |
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188 # 8 bits stream id |
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189 # 8 bits stream flags |
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190 # 4 bits type |
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191 # 4 bits flags |
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192 |
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193 l = struct.pack('<I', len(payload)) |
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194 frame[0:3] = l[0:3] |
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195 struct.pack_into('<HBB', frame, 3, requestid, streamid, streamflags) |
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196 frame[7] = (typeid << 4) | flags |
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197 frame[8:] = payload |
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198 |
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199 return frame |
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200 |
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201 |
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202 def makeframefromhumanstring(s): |
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203 """Create a frame from a human readable string |
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204 |
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205 Strings have the form: |
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206 |
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207 <request-id> <stream-id> <stream-flags> <type> <flags> <payload> |
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208 |
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209 This can be used by user-facing applications and tests for creating |
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210 frames easily without having to type out a bunch of constants. |
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211 |
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212 Request ID and stream IDs are integers. |
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213 |
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214 Stream flags, frame type, and flags can be specified by integer or |
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215 named constant. |
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216 |
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217 Flags can be delimited by `|` to bitwise OR them together. |
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218 |
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219 If the payload begins with ``cbor:``, the following string will be |
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220 evaluated as Python literal and the resulting object will be fed into |
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221 a CBOR encoder. Otherwise, the payload is interpreted as a Python |
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222 byte string literal. |
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223 """ |
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224 fields = s.split(b' ', 5) |
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225 requestid, streamid, streamflags, frametype, frameflags, payload = fields |
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226 |
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227 requestid = int(requestid) |
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228 streamid = int(streamid) |
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229 |
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230 finalstreamflags = 0 |
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231 for flag in streamflags.split(b'|'): |
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232 if flag in STREAM_FLAGS: |
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233 finalstreamflags |= STREAM_FLAGS[flag] |
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234 else: |
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235 finalstreamflags |= int(flag) |
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236 |
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237 if frametype in FRAME_TYPES: |
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238 frametype = FRAME_TYPES[frametype] |
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239 else: |
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240 frametype = int(frametype) |
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241 |
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242 finalflags = 0 |
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243 validflags = FRAME_TYPE_FLAGS[frametype] |
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244 for flag in frameflags.split(b'|'): |
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245 if flag in validflags: |
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246 finalflags |= validflags[flag] |
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247 else: |
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248 finalflags |= int(flag) |
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249 |
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250 if payload.startswith(b'cbor:'): |
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251 payload = b''.join( |
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252 cborutil.streamencode(stringutil.evalpythonliteral(payload[5:])) |
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253 ) |
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254 |
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255 else: |
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256 payload = stringutil.unescapestr(payload) |
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257 |
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258 return makeframe( |
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259 requestid=requestid, |
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260 streamid=streamid, |
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261 streamflags=finalstreamflags, |
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262 typeid=frametype, |
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263 flags=finalflags, |
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264 payload=payload, |
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265 ) |
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266 |
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267 |
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268 def parseheader(data): |
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269 """Parse a unified framing protocol frame header from a buffer. |
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270 |
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271 The header is expected to be in the buffer at offset 0 and the |
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272 buffer is expected to be large enough to hold a full header. |
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273 """ |
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274 # 24 bits payload length (little endian) |
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275 # 16 bits request ID |
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276 # 8 bits stream ID |
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277 # 8 bits stream flags |
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278 # 4 bits frame type |
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279 # 4 bits frame flags |
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280 # ... payload |
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281 framelength = data[0] + 256 * data[1] + 16384 * data[2] |
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282 requestid, streamid, streamflags = struct.unpack_from('<HBB', data, 3) |
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283 typeflags = data[7] |
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284 |
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285 frametype = (typeflags & 0xF0) >> 4 |
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286 frameflags = typeflags & 0x0F |
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287 |
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288 return frameheader( |
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289 framelength, requestid, streamid, streamflags, frametype, frameflags |
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290 ) |
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291 |
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292 |
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293 def readframe(fh): |
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294 """Read a unified framing protocol frame from a file object. |
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295 |
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296 Returns a 3-tuple of (type, flags, payload) for the decoded frame or |
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297 None if no frame is available. May raise if a malformed frame is |
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298 seen. |
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299 """ |
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300 header = bytearray(FRAME_HEADER_SIZE) |
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301 |
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302 readcount = fh.readinto(header) |
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303 |
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304 if readcount == 0: |
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305 return None |
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306 |
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307 if readcount != FRAME_HEADER_SIZE: |
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308 raise error.Abort( |
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309 _(b'received incomplete frame: got %d bytes: %s') |
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310 % (readcount, header) |
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311 ) |
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312 |
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313 h = parseheader(header) |
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314 |
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315 payload = fh.read(h.length) |
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316 if len(payload) != h.length: |
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317 raise error.Abort( |
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318 _(b'frame length error: expected %d; got %d') |
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319 % (h.length, len(payload)) |
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320 ) |
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321 |
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322 return frame( |
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323 h.requestid, h.streamid, h.streamflags, h.typeid, h.flags, payload |
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324 ) |
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325 |
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326 |
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327 def createcommandframes( |
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328 stream, |
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329 requestid, |
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330 cmd, |
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331 args, |
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332 datafh=None, |
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333 maxframesize=DEFAULT_MAX_FRAME_SIZE, |
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334 redirect=None, |
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335 ): |
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336 """Create frames necessary to transmit a request to run a command. |
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337 |
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338 This is a generator of bytearrays. Each item represents a frame |
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339 ready to be sent over the wire to a peer. |
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340 """ |
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341 data = {b'name': cmd} |
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342 if args: |
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343 data[b'args'] = args |
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344 |
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345 if redirect: |
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346 data[b'redirect'] = redirect |
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347 |
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348 data = b''.join(cborutil.streamencode(data)) |
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349 |
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350 offset = 0 |
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351 |
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352 while True: |
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353 flags = 0 |
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354 |
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355 # Must set new or continuation flag. |
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356 if not offset: |
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357 flags |= FLAG_COMMAND_REQUEST_NEW |
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358 else: |
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359 flags |= FLAG_COMMAND_REQUEST_CONTINUATION |
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360 |
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361 # Data frames is set on all frames. |
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362 if datafh: |
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363 flags |= FLAG_COMMAND_REQUEST_EXPECT_DATA |
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364 |
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365 payload = data[offset : offset + maxframesize] |
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366 offset += len(payload) |
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367 |
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368 if len(payload) == maxframesize and offset < len(data): |
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369 flags |= FLAG_COMMAND_REQUEST_MORE_FRAMES |
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370 |
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371 yield stream.makeframe( |
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372 requestid=requestid, |
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373 typeid=FRAME_TYPE_COMMAND_REQUEST, |
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374 flags=flags, |
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375 payload=payload, |
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376 ) |
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377 |
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|
378 if not (flags & FLAG_COMMAND_REQUEST_MORE_FRAMES): |
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379 break |
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380 |
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381 if datafh: |
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382 while True: |
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383 data = datafh.read(DEFAULT_MAX_FRAME_SIZE) |
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384 |
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385 done = False |
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386 if len(data) == DEFAULT_MAX_FRAME_SIZE: |
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387 flags = FLAG_COMMAND_DATA_CONTINUATION |
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388 else: |
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389 flags = FLAG_COMMAND_DATA_EOS |
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390 assert datafh.read(1) == b'' |
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391 done = True |
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392 |
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393 yield stream.makeframe( |
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394 requestid=requestid, |
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395 typeid=FRAME_TYPE_COMMAND_DATA, |
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396 flags=flags, |
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397 payload=data, |
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398 ) |
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399 |
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400 if done: |
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|
401 break |
37052
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402 |
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403 |
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404 def createcommandresponseokframe(stream, requestid): |
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405 overall = b''.join(cborutil.streamencode({b'status': b'ok'})) |
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406 |
40138
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407 if stream.streamsettingssent: |
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408 overall = stream.encode(overall) |
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409 encoded = True |
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410 |
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411 if not overall: |
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412 return None |
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413 else: |
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414 encoded = False |
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415 |
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416 return stream.makeframe( |
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417 requestid=requestid, |
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418 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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419 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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420 payload=overall, |
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421 encoded=encoded, |
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422 ) |
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423 |
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424 |
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425 def createcommandresponseeosframes( |
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426 stream, requestid, maxframesize=DEFAULT_MAX_FRAME_SIZE |
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427 ): |
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428 """Create an empty payload frame representing command end-of-stream.""" |
40138
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|
429 payload = stream.flush() |
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|
430 |
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|
431 offset = 0 |
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432 while True: |
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433 chunk = payload[offset : offset + maxframesize] |
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|
434 offset += len(chunk) |
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|
435 |
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|
436 done = offset == len(payload) |
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|
437 |
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|
438 if done: |
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|
439 flags = FLAG_COMMAND_RESPONSE_EOS |
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|
440 else: |
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441 flags = FLAG_COMMAND_RESPONSE_CONTINUATION |
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442 |
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443 yield stream.makeframe( |
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444 requestid=requestid, |
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445 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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|
446 flags=flags, |
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447 payload=chunk, |
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448 encoded=payload != b'', |
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|
449 ) |
40138
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|
450 |
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|
451 if done: |
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|
452 break |
37728
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|
453 |
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|
454 |
40025
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diff
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|
455 def createalternatelocationresponseframe(stream, requestid, location): |
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|
456 data = { |
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|
457 b'status': b'redirect', |
45942
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|
458 b'location': { |
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|
459 b'url': location.url, |
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|
460 b'mediatype': location.mediatype, |
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|
461 }, |
40025
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|
462 } |
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|
463 |
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|
464 for a in ( |
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43117
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changeset
|
465 'size', |
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|
466 'fullhashes', |
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|
467 'fullhashseed', |
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|
468 'serverdercerts', |
9f70512ae2cf
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|
469 'servercadercerts', |
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|
470 ): |
40025
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diff
changeset
|
471 value = getattr(location, a) |
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diff
changeset
|
472 if value is not None: |
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|
473 data[b'location'][pycompat.bytestr(a)] = value |
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|
474 |
40138
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|
475 payload = b''.join(cborutil.streamencode(data)) |
b5bf3dd6ec5b
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diff
changeset
|
476 |
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diff
changeset
|
477 if stream.streamsettingssent: |
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|
478 payload = stream.encode(payload) |
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|
479 encoded = True |
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|
480 else: |
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changeset
|
481 encoded = False |
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|
482 |
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|
483 return stream.makeframe( |
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|
484 requestid=requestid, |
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485 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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486 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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487 payload=payload, |
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488 encoded=encoded, |
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489 ) |
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490 |
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491 |
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492 def createcommanderrorresponse(stream, requestid, message, args=None): |
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493 # TODO should this be using a list of {'msg': ..., 'args': {}} so atom |
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494 # formatting works consistently? |
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495 m = { |
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496 b'status': b'error', |
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497 b'error': { |
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498 b'message': message, |
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499 }, |
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500 } |
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501 |
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502 if args: |
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503 m[b'error'][b'args'] = args |
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504 |
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505 overall = b''.join(cborutil.streamencode(m)) |
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506 |
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507 yield stream.makeframe( |
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508 requestid=requestid, |
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509 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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510 flags=FLAG_COMMAND_RESPONSE_EOS, |
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511 payload=overall, |
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512 ) |
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513 |
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514 |
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515 def createerrorframe(stream, requestid, msg, errtype): |
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516 # TODO properly handle frame size limits. |
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517 assert len(msg) <= DEFAULT_MAX_FRAME_SIZE |
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518 |
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519 payload = b''.join( |
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520 cborutil.streamencode( |
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521 { |
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522 b'type': errtype, |
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523 b'message': [{b'msg': msg}], |
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524 } |
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525 ) |
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526 ) |
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527 |
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528 yield stream.makeframe( |
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529 requestid=requestid, |
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530 typeid=FRAME_TYPE_ERROR_RESPONSE, |
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531 flags=0, |
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532 payload=payload, |
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533 ) |
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534 |
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535 |
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536 def createtextoutputframe( |
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537 stream, requestid, atoms, maxframesize=DEFAULT_MAX_FRAME_SIZE |
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538 ): |
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539 """Create a text output frame to render text to people. |
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540 |
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541 ``atoms`` is a 3-tuple of (formatting string, args, labels). |
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542 |
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543 The formatting string contains ``%s`` tokens to be replaced by the |
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544 corresponding indexed entry in ``args``. ``labels`` is an iterable of |
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545 formatters to be applied at rendering time. In terms of the ``ui`` |
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546 class, each atom corresponds to a ``ui.write()``. |
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547 """ |
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548 atomdicts = [] |
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549 |
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550 for (formatting, args, labels) in atoms: |
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551 # TODO look for localstr, other types here? |
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552 |
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553 if not isinstance(formatting, bytes): |
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554 raise ValueError(b'must use bytes formatting strings') |
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555 for arg in args: |
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556 if not isinstance(arg, bytes): |
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557 raise ValueError(b'must use bytes for arguments') |
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558 for label in labels: |
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559 if not isinstance(label, bytes): |
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560 raise ValueError(b'must use bytes for labels') |
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561 |
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562 # Formatting string must be ASCII. |
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563 formatting = formatting.decode('ascii', 'replace').encode('ascii') |
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564 |
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565 # Arguments must be UTF-8. |
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566 args = [a.decode('utf-8', 'replace').encode('utf-8') for a in args] |
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567 |
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568 # Labels must be ASCII. |
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569 labels = [l.decode('ascii', 'strict').encode('ascii') for l in labels] |
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570 |
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571 atom = {b'msg': formatting} |
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572 if args: |
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573 atom[b'args'] = args |
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574 if labels: |
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575 atom[b'labels'] = labels |
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576 |
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577 atomdicts.append(atom) |
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578 |
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579 payload = b''.join(cborutil.streamencode(atomdicts)) |
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580 |
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581 if len(payload) > maxframesize: |
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582 raise ValueError(b'cannot encode data in a single frame') |
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583 |
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584 yield stream.makeframe( |
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585 requestid=requestid, |
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586 typeid=FRAME_TYPE_TEXT_OUTPUT, |
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587 flags=0, |
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588 payload=payload, |
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589 ) |
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590 |
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591 |
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592 class bufferingcommandresponseemitter: |
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593 """Helper object to emit command response frames intelligently. |
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594 |
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595 Raw command response data is likely emitted in chunks much smaller |
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596 than what can fit in a single frame. This class exists to buffer |
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597 chunks until enough data is available to fit in a single frame. |
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598 |
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599 TODO we'll need something like this when compression is supported. |
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600 So it might make sense to implement this functionality at the stream |
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601 level. |
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602 """ |
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603 |
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604 def __init__(self, stream, requestid, maxframesize=DEFAULT_MAX_FRAME_SIZE): |
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605 self._stream = stream |
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606 self._requestid = requestid |
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607 self._maxsize = maxframesize |
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608 self._chunks = [] |
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609 self._chunkssize = 0 |
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610 |
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611 def send(self, data): |
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612 """Send new data for emission. |
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613 |
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614 Is a generator of new frames that were derived from the new input. |
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615 |
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616 If the special input ``None`` is received, flushes all buffered |
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617 data to frames. |
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618 """ |
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619 |
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620 if data is None: |
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621 for frame in self._flush(): |
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622 yield frame |
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623 return |
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624 |
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625 data = self._stream.encode(data) |
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626 |
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627 # There is a ton of potential to do more complicated things here. |
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628 # Our immediate goal is to coalesce small chunks into big frames, |
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629 # not achieve the fewest number of frames possible. So we go with |
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630 # a simple implementation: |
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631 # |
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632 # * If a chunk is too large for a frame, we flush and emit frames |
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633 # for the new chunk. |
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634 # * If a chunk can be buffered without total buffered size limits |
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635 # being exceeded, we do that. |
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636 # * If a chunk causes us to go over our buffering limit, we flush |
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637 # and then buffer the new chunk. |
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638 |
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639 if not data: |
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640 return |
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641 |
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642 if len(data) > self._maxsize: |
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643 for frame in self._flush(): |
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644 yield frame |
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645 |
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646 # Now emit frames for the big chunk. |
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647 offset = 0 |
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648 while True: |
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649 chunk = data[offset : offset + self._maxsize] |
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650 offset += len(chunk) |
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651 |
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652 yield self._stream.makeframe( |
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653 self._requestid, |
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654 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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655 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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656 payload=chunk, |
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657 encoded=True, |
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658 ) |
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659 |
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660 if offset == len(data): |
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661 return |
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662 |
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663 # If we don't have enough to constitute a full frame, buffer and |
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664 # return. |
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665 if len(data) + self._chunkssize < self._maxsize: |
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666 self._chunks.append(data) |
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667 self._chunkssize += len(data) |
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668 return |
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669 |
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670 # Else flush what we have and buffer the new chunk. We could do |
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671 # something more intelligent here, like break the chunk. Let's |
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672 # keep things simple for now. |
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673 for frame in self._flush(): |
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674 yield frame |
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|
675 |
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676 self._chunks.append(data) |
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677 self._chunkssize = len(data) |
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|
678 |
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679 def _flush(self): |
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680 payload = b''.join(self._chunks) |
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681 assert len(payload) <= self._maxsize |
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682 |
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683 self._chunks[:] = [] |
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684 self._chunkssize = 0 |
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|
685 |
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686 if not payload: |
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687 return |
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688 |
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689 yield self._stream.makeframe( |
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690 self._requestid, |
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691 typeid=FRAME_TYPE_COMMAND_RESPONSE, |
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692 flags=FLAG_COMMAND_RESPONSE_CONTINUATION, |
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693 payload=payload, |
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694 encoded=True, |
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695 ) |
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696 |
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|
697 |
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698 # TODO consider defining encoders/decoders using the util.compressionengine |
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699 # mechanism. |
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700 |
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701 |
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702 class identityencoder: |
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703 """Encoder for the "identity" stream encoding profile.""" |
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704 |
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705 def __init__(self, ui): |
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706 pass |
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|
707 |
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708 def encode(self, data): |
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709 return data |
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|
710 |
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|
711 def flush(self): |
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712 return b'' |
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|
713 |
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|
714 def finish(self): |
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|
715 return b'' |
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|
716 |
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717 |
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718 class identitydecoder: |
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719 """Decoder for the "identity" stream encoding profile.""" |
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720 |
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|
721 def __init__(self, ui, extraobjs): |
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722 if extraobjs: |
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|
723 raise error.Abort( |
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|
724 _(b'identity decoder received unexpected additional values') |
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725 ) |
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|
726 |
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727 def decode(self, data): |
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728 return data |
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|
729 |
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730 |
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731 class zlibencoder: |
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732 def __init__(self, ui): |
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733 import zlib |
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734 |
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735 self._zlib = zlib |
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736 self._compressor = zlib.compressobj() |
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737 |
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738 def encode(self, data): |
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739 return self._compressor.compress(data) |
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740 |
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741 def flush(self): |
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742 # Z_SYNC_FLUSH doesn't reset compression context, which is |
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743 # what we want. |
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744 return self._compressor.flush(self._zlib.Z_SYNC_FLUSH) |
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745 |
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746 def finish(self): |
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747 res = self._compressor.flush(self._zlib.Z_FINISH) |
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748 self._compressor = None |
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749 return res |
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750 |
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751 |
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752 class zlibdecoder: |
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753 def __init__(self, ui, extraobjs): |
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754 import zlib |
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755 |
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756 if extraobjs: |
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757 raise error.Abort( |
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758 _(b'zlib decoder received unexpected additional values') |
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759 ) |
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760 |
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761 self._decompressor = zlib.decompressobj() |
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762 |
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763 def decode(self, data): |
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764 return self._decompressor.decompress(data) |
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765 |
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766 |
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767 class zstdbaseencoder: |
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768 def __init__(self, level): |
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769 from . import zstd |
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770 |
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771 self._zstd = zstd |
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772 cctx = zstd.ZstdCompressor(level=level) |
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773 self._compressor = cctx.compressobj() |
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774 |
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775 def encode(self, data): |
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776 return self._compressor.compress(data) |
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777 |
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778 def flush(self): |
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779 # COMPRESSOBJ_FLUSH_BLOCK flushes all data previously fed into the |
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780 # compressor and allows a decompressor to access all encoded data |
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781 # up to this point. |
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782 return self._compressor.flush(self._zstd.COMPRESSOBJ_FLUSH_BLOCK) |
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783 |
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784 def finish(self): |
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785 res = self._compressor.flush(self._zstd.COMPRESSOBJ_FLUSH_FINISH) |
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786 self._compressor = None |
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787 return res |
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788 |
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789 |
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790 class zstd8mbencoder(zstdbaseencoder): |
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791 def __init__(self, ui): |
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792 super(zstd8mbencoder, self).__init__(3) |
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793 |
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794 |
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795 class zstdbasedecoder: |
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796 def __init__(self, maxwindowsize): |
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797 from . import zstd |
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798 |
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799 dctx = zstd.ZstdDecompressor(max_window_size=maxwindowsize) |
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800 self._decompressor = dctx.decompressobj() |
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|
801 |
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802 def decode(self, data): |
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803 return self._decompressor.decompress(data) |
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804 |
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805 |
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806 class zstd8mbdecoder(zstdbasedecoder): |
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807 def __init__(self, ui, extraobjs): |
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808 if extraobjs: |
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809 raise error.Abort( |
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|
810 _(b'zstd8mb decoder received unexpected additional values') |
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811 ) |
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812 |
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|
813 super(zstd8mbdecoder, self).__init__(maxwindowsize=8 * 1048576) |
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814 |
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815 |
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816 # We lazily populate this to avoid excessive module imports when importing |
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817 # this module. |
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818 STREAM_ENCODERS = {} |
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819 STREAM_ENCODERS_ORDER = [] |
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820 |
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821 |
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822 def populatestreamencoders(): |
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823 if STREAM_ENCODERS: |
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824 return |
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|
825 |
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826 try: |
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827 from . import zstd |
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828 |
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829 zstd.__version__ |
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830 except ImportError: |
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831 zstd = None |
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832 |
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833 # zstandard is fastest and is preferred. |
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834 if zstd: |
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835 STREAM_ENCODERS[b'zstd-8mb'] = (zstd8mbencoder, zstd8mbdecoder) |
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836 STREAM_ENCODERS_ORDER.append(b'zstd-8mb') |
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837 |
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838 STREAM_ENCODERS[b'zlib'] = (zlibencoder, zlibdecoder) |
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839 STREAM_ENCODERS_ORDER.append(b'zlib') |
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840 |
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841 STREAM_ENCODERS[b'identity'] = (identityencoder, identitydecoder) |
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842 STREAM_ENCODERS_ORDER.append(b'identity') |
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843 |
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844 |
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845 class stream: |
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846 """Represents a logical unidirectional series of frames.""" |
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847 |
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848 def __init__(self, streamid, active=False): |
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849 self.streamid = streamid |
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850 self._active = active |
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|
851 |
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|
852 def makeframe(self, requestid, typeid, flags, payload): |
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|
853 """Create a frame to be sent out over this stream. |
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|
854 |
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855 Only returns the frame instance. Does not actually send it. |
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856 """ |
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|
857 streamflags = 0 |
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858 if not self._active: |
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859 streamflags |= STREAM_FLAG_BEGIN_STREAM |
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860 self._active = True |
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861 |
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862 return makeframe( |
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863 requestid, self.streamid, streamflags, typeid, flags, payload |
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864 ) |
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865 |
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|
866 |
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|
867 class inputstream(stream): |
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|
868 """Represents a stream used for receiving data.""" |
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|
869 |
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870 def __init__(self, streamid, active=False): |
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|
871 super(inputstream, self).__init__(streamid, active=active) |
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872 self._decoder = None |
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873 |
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874 def setdecoder(self, ui, name, extraobjs): |
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875 """Set the decoder for this stream. |
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|
876 |
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|
877 Receives the stream profile name and any additional CBOR objects |
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|
878 decoded from the stream encoding settings frame payloads. |
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879 """ |
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880 if name not in STREAM_ENCODERS: |
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|
881 raise error.Abort(_(b'unknown stream decoder: %s') % name) |
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|
882 |
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|
883 self._decoder = STREAM_ENCODERS[name][1](ui, extraobjs) |
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|
884 |
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|
885 def decode(self, data): |
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|
886 # Default is identity decoder. We don't bother instantiating one |
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|
887 # because it is trivial. |
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|
888 if not self._decoder: |
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|
889 return data |
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|
890 |
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|
891 return self._decoder.decode(data) |
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|
892 |
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|
893 def flush(self): |
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|
894 if not self._decoder: |
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|
895 return b'' |
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|
896 |
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|
897 return self._decoder.flush() |
40128
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|
898 |
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|
899 |
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|
900 class outputstream(stream): |
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|
901 """Represents a stream used for sending data.""" |
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|
902 |
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|
903 def __init__(self, streamid, active=False): |
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diff
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|
904 super(outputstream, self).__init__(streamid, active=active) |
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|
905 self.streamsettingssent = False |
40132
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|
906 self._encoder = None |
40138
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|
907 self._encodername = None |
40132
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|
908 |
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|
909 def setencoder(self, ui, name): |
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|
910 """Set the encoder for this stream. |
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|
911 |
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|
912 Receives the stream profile name. |
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|
913 """ |
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|
914 if name not in STREAM_ENCODERS: |
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|
915 raise error.Abort(_(b'unknown stream encoder: %s') % name) |
40132
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|
916 |
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|
917 self._encoder = STREAM_ENCODERS[name][0](ui) |
40138
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|
918 self._encodername = name |
40132
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|
919 |
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|
920 def encode(self, data): |
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|
921 if not self._encoder: |
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|
922 return data |
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changeset
|
923 |
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|
924 return self._encoder.encode(data) |
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|
925 |
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|
926 def flush(self): |
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|
927 if not self._encoder: |
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|
928 return b'' |
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|
929 |
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|
930 return self._encoder.flush() |
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|
931 |
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|
932 def finish(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 self._encoder.finish() |
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|
937 |
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|
938 def makeframe(self, requestid, typeid, flags, payload, encoded=False): |
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|
939 """Create a frame to be sent out over this stream. |
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|
940 |
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changeset
|
941 Only returns the frame instance. Does not actually send it. |
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|
942 """ |
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|
943 streamflags = 0 |
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|
944 if not self._active: |
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|
945 streamflags |= STREAM_FLAG_BEGIN_STREAM |
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|
946 self._active = True |
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|
947 |
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|
948 if encoded: |
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|
949 if not self.streamsettingssent: |
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|
950 raise error.ProgrammingError( |
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|
951 b'attempting to send encoded frame without sending stream ' |
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|
952 b'settings' |
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|
953 ) |
40138
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|
954 |
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|
955 streamflags |= STREAM_FLAG_ENCODING_APPLIED |
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|
956 |
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|
957 if ( |
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|
958 typeid == FRAME_TYPE_STREAM_SETTINGS |
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|
959 and flags & FLAG_STREAM_ENCODING_SETTINGS_EOS |
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|
960 ): |
40138
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|
961 self.streamsettingssent = True |
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|
962 |
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|
963 return makeframe( |
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|
964 requestid, self.streamid, streamflags, typeid, flags, payload |
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|
965 ) |
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966 |
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967 def makestreamsettingsframe(self, requestid): |
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968 """Create a stream settings frame for this stream. |
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969 |
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970 Returns frame data or None if no stream settings frame is needed or has |
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971 already been sent. |
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972 """ |
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973 if not self._encoder or self.streamsettingssent: |
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974 return None |
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975 |
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976 payload = b''.join(cborutil.streamencode(self._encodername)) |
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977 return self.makeframe( |
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978 requestid, |
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979 FRAME_TYPE_STREAM_SETTINGS, |
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980 FLAG_STREAM_ENCODING_SETTINGS_EOS, |
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981 payload, |
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982 ) |
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983 |
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984 |
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985 def ensureserverstream(stream): |
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986 if stream.streamid % 2: |
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987 raise error.ProgrammingError( |
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988 b'server should only write to even ' |
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989 b'numbered streams; %d is not even' % stream.streamid |
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990 ) |
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991 |
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992 |
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993 DEFAULT_PROTOCOL_SETTINGS = { |
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994 b'contentencodings': [b'identity'], |
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995 } |
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996 |
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997 |
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998 class serverreactor: |
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999 """Holds state of a server handling frame-based protocol requests. |
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1000 |
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1001 This class is the "brain" of the unified frame-based protocol server |
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1002 component. While the protocol is stateless from the perspective of |
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1003 requests/commands, something needs to track which frames have been |
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1004 received, what frames to expect, etc. This class is that thing. |
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1005 |
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1006 Instances are modeled as a state machine of sorts. Instances are also |
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1007 reactionary to external events. The point of this class is to encapsulate |
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1008 the state of the connection and the exchange of frames, not to perform |
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1009 work. Instead, callers tell this class when something occurs, like a |
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1010 frame arriving. If that activity is worthy of a follow-up action (say |
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1011 *run a command*), the return value of that handler will say so. |
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1012 |
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1013 I/O and CPU intensive operations are purposefully delegated outside of |
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1014 this class. |
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1015 |
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1016 Consumers are expected to tell instances when events occur. They do so by |
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1017 calling the various ``on*`` methods. These methods return a 2-tuple |
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1018 describing any follow-up action(s) to take. The first element is the |
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1019 name of an action to perform. The second is a data structure (usually |
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1020 a dict) specific to that action that contains more information. e.g. |
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1021 if the server wants to send frames back to the client, the data structure |
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1022 will contain a reference to those frames. |
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1023 |
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1024 Valid actions that consumers can be instructed to take are: |
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1025 |
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1026 sendframes |
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1027 Indicates that frames should be sent to the client. The ``framegen`` |
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1028 key contains a generator of frames that should be sent. The server |
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1029 assumes that all frames are sent to the client. |
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1030 |
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1031 error |
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1032 Indicates that an error occurred. Consumer should probably abort. |
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1033 |
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1034 runcommand |
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1035 Indicates that the consumer should run a wire protocol command. Details |
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1036 of the command to run are given in the data structure. |
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1037 |
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1038 wantframe |
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1039 Indicates that nothing of interest happened and the server is waiting on |
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1040 more frames from the client before anything interesting can be done. |
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1041 |
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1042 noop |
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1043 Indicates no additional action is required. |
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1044 |
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1045 Known Issues |
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1046 ------------ |
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1047 |
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1048 There are no limits to the number of partially received commands or their |
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1049 size. A malicious client could stream command request data and exhaust the |
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1050 server's memory. |
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1051 |
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1052 Partially received commands are not acted upon when end of input is |
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1053 reached. Should the server error if it receives a partial request? |
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1054 Should the client send a message to abort a partially transmitted request |
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1055 to facilitate graceful shutdown? |
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1056 |
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1057 Active requests that haven't been responded to aren't tracked. This means |
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1058 that if we receive a command and instruct its dispatch, another command |
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1059 with its request ID can come in over the wire and there will be a race |
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1060 between who responds to what. |
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1061 """ |
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1062 |
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1063 def __init__(self, ui, deferoutput=False): |
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1064 """Construct a new server reactor. |
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1065 |
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1066 ``deferoutput`` can be used to indicate that no output frames should be |
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1067 instructed to be sent until input has been exhausted. In this mode, |
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1068 events that would normally generate output frames (such as a command |
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1069 response being ready) will instead defer instructing the consumer to |
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1070 send those frames. This is useful for half-duplex transports where the |
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1071 sender cannot receive until all data has been transmitted. |
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1072 """ |
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1073 self._ui = ui |
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1074 self._deferoutput = deferoutput |
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1075 self._state = b'initial' |
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1076 self._nextoutgoingstreamid = 2 |
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1077 self._bufferedframegens = [] |
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1078 # stream id -> stream instance for all active streams from the client. |
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1079 self._incomingstreams = {} |
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1080 self._outgoingstreams = {} |
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1081 # request id -> dict of commands that are actively being received. |
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1082 self._receivingcommands = {} |
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1083 # Request IDs that have been received and are actively being processed. |
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1084 # Once all output for a request has been sent, it is removed from this |
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1085 # set. |
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1086 self._activecommands = set() |
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1087 |
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1088 self._protocolsettingsdecoder = None |
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1089 |
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1090 # Sender protocol settings are optional. Set implied default values. |
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1091 self._sendersettings = dict(DEFAULT_PROTOCOL_SETTINGS) |
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1092 |
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1093 populatestreamencoders() |
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1094 |
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1095 def onframerecv(self, frame): |
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1096 """Process a frame that has been received off the wire. |
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1097 |
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1098 Returns a dict with an ``action`` key that details what action, |
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1099 if any, the consumer should take next. |
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1100 """ |
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1101 if not frame.streamid % 2: |
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1102 self._state = b'errored' |
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1103 return self._makeerrorresult( |
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1104 _(b'received frame with even numbered stream ID: %d') |
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1105 % frame.streamid |
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1106 ) |
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1107 |
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1108 if frame.streamid not in self._incomingstreams: |
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1109 if not frame.streamflags & STREAM_FLAG_BEGIN_STREAM: |
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1110 self._state = b'errored' |
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1111 return self._makeerrorresult( |
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1112 _( |
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1113 b'received frame on unknown inactive stream without ' |
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1114 b'beginning of stream flag set' |
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1115 ) |
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1116 ) |
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1117 |
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1118 self._incomingstreams[frame.streamid] = inputstream(frame.streamid) |
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1119 |
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1120 if frame.streamflags & STREAM_FLAG_ENCODING_APPLIED: |
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1121 # TODO handle decoding frames |
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1122 self._state = b'errored' |
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1123 raise error.ProgrammingError( |
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1124 b'support for decoding stream payloads not yet implemented' |
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1125 ) |
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1126 |
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1127 if frame.streamflags & STREAM_FLAG_END_STREAM: |
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1128 del self._incomingstreams[frame.streamid] |
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1129 |
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1130 handlers = { |
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1131 b'initial': self._onframeinitial, |
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1132 b'protocol-settings-receiving': self._onframeprotocolsettings, |
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1133 b'idle': self._onframeidle, |
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1134 b'command-receiving': self._onframecommandreceiving, |
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1135 b'errored': self._onframeerrored, |
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1136 } |
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1137 |
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1138 meth = handlers.get(self._state) |
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1139 if not meth: |
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1140 raise error.ProgrammingError(b'unhandled state: %s' % self._state) |
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1141 |
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1142 return meth(frame) |
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1143 |
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1144 def oncommandresponsereadyobjects(self, stream, requestid, objs): |
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1145 """Signal that objects are ready to be sent to the client. |
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1146 |
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1147 ``objs`` is an iterable of objects (typically a generator) that will |
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1148 be encoded via CBOR and added to frames, which will be sent to the |
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1149 client. |
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1150 """ |
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1151 ensureserverstream(stream) |
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1152 |
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1153 # A more robust solution would be to check for objs.{next,__next__}. |
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1154 if isinstance(objs, list): |
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1155 objs = iter(objs) |
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1156 |
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1157 # We need to take care over exception handling. Uncaught exceptions |
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1158 # when generating frames could lead to premature end of the frame |
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1159 # stream and the possibility of the server or client process getting |
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1160 # in a bad state. |
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1161 # |
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1162 # Keep in mind that if ``objs`` is a generator, advancing it could |
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1163 # raise exceptions that originated in e.g. wire protocol command |
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1164 # functions. That is why we differentiate between exceptions raised |
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1165 # when iterating versus other exceptions that occur. |
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1166 # |
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1167 # In all cases, when the function finishes, the request is fully |
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1168 # handled and no new frames for it should be seen. |
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1169 |
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1170 def sendframes(): |
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1171 emitted = False |
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1172 alternatelocationsent = False |
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1173 emitter = bufferingcommandresponseemitter(stream, requestid) |
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1174 while True: |
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1175 try: |
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1176 o = next(objs) |
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1177 except StopIteration: |
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1178 for frame in emitter.send(None): |
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1179 yield frame |
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1180 |
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1181 if emitted: |
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1182 for frame in createcommandresponseeosframes( |
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1183 stream, requestid |
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1184 ): |
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1185 yield frame |
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1186 break |
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1187 |
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1188 except error.WireprotoCommandError as e: |
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1189 for frame in createcommanderrorresponse( |
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1190 stream, requestid, e.message, e.messageargs |
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1191 ): |
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1192 yield frame |
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1193 break |
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1194 |
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1195 except Exception as e: |
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1196 for frame in createerrorframe( |
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1197 stream, |
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40328
diff
changeset
|
1198 requestid, |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1199 b'%s' % stringutil.forcebytestr(e), |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1200 errtype=b'server', |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1201 ): |
39838
bce1c1af7518
py3: cast exception to bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39560
diff
changeset
|
1202 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1203 yield frame |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1204 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1205 break |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1206 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1207 try: |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1208 # 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
|
1209 # only object in the output stream. |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1210 if isinstance(o, wireprototypes.alternatelocationresponse): |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1211 if emitted: |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1212 raise error.ProgrammingError( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1213 b'alternatelocationresponse seen after initial ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1214 b'output object' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1215 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1216 |
40138
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1217 frame = stream.makestreamsettingsframe(requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1218 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1219 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1220 |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1221 yield createalternatelocationresponseframe( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1222 stream, requestid, o |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1223 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1224 |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1225 alternatelocationsent = True |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1226 emitted = True |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1227 continue |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1228 |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1229 if alternatelocationsent: |
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1230 raise error.ProgrammingError( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1231 b'object follows alternatelocationresponse' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1232 ) |
40025
b099e6032f38
wireprotov2: server support for sending content redirects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40024
diff
changeset
|
1233 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1234 if not emitted: |
40138
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1235 # Frame is optional. |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1236 frame = stream.makestreamsettingsframe(requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1237 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1238 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1239 |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1240 # 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
|
1241 frame = createcommandresponseokframe(stream, requestid) |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1242 if frame: |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1243 yield frame |
b5bf3dd6ec5b
wireprotov2: send content encoded frames from server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40136
diff
changeset
|
1244 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1245 emitted = True |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1246 |
40020
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1247 # 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
|
1248 # data structures or special types. |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1249 # 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
|
1250 # 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
|
1251 |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1252 # 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
|
1253 if isinstance(o, wireprototypes.encodedresponse): |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1254 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
|
1255 yield frame |
84bf6ded9317
wireprotoframing: buffer emitted data to reduce frame count
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39559
diff
changeset
|
1256 |
40328
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1257 elif isinstance( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1258 o, wireprototypes.indefinitebytestringresponse |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1259 ): |
40328
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1260 for chunk in cborutil.streamencodebytestringfromiter( |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1261 o.chunks |
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
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 |
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1264 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
|
1265 yield frame |
2c55716f8a1c
wireprotov2: add response type that serializes to indefinite length bytestring
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40138
diff
changeset
|
1266 |
40020
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1267 # 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
|
1268 else: |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1269 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
|
1270 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
|
1271 yield frame |
ed919b90acda
wireprotov2: define type to represent pre-encoded object
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39838
diff
changeset
|
1272 |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1273 except Exception as e: |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1274 for frame in createerrorframe( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1275 stream, requestid, b'%s' % e, errtype=b'server' |
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
40328
diff
changeset
|
1276 ): |
39559
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1277 yield frame |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1278 |
07b58266bce3
wireprotov2: implement commands as a generator of objects
Gregory Szorc <gregory.szorc@gmail.com>
parents:
39486
diff
changeset
|
1279 break |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1280 |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1281 self._activecommands.remove(requestid) |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1282 |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1283 return self._handlesendframes(sendframes()) |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1284 |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1285 def oninputeof(self): |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1286 """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
|
1287 |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1288 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
|
1289 completed. |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1290 """ |
37058
c5e9c3b47366
wireproto: support for receiving multiple requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37057
diff
changeset
|
1291 # 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
|
1292 |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1293 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
|
1294 return b'noop', {} |
37056
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1295 |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1296 # 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
|
1297 def makegen(): |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1298 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
|
1299 for frame in gen: |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1300 yield frame |
861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37055
diff
changeset
|
1301 |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1302 return b'sendframes', { |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1303 b'framegen': makegen(), |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1304 } |
37055
61393f888dfe
wireproto: define and implement responses in framing protocol
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37052
diff
changeset
|
1305 |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1306 def _handlesendframes(self, framegen): |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1307 if self._deferoutput: |
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1308 self._bufferedframegens.append(framegen) |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
1309 return b'noop', {} |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1310 else: |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1311 return b'sendframes', { |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1312 b'framegen': framegen, |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
43506
diff
changeset
|
1313 } |
37728
564a3eec6e63
wireprotov2: add support for more response types
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37726
diff
changeset
|
1314 |
37726
0c184ca594bb
wireprotov2: change behavior of error frame
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37725
diff
changeset
|
1315 def onservererror(self, stream, requestid, msg): |
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|
1316 ensureserverstream(stream) |
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|
1317 |
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|
1318 def sendframes(): |
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|
1319 for frame in createerrorframe( |
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|
1320 stream, requestid, msg, errtype=b'server' |
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|
1321 ): |
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|
1322 yield frame |
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|
1323 |
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|
1324 self._activecommands.remove(requestid) |
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|
1325 |
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|
1326 return self._handlesendframes(sendframes()) |
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|
1327 |
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|
1328 def oncommanderror(self, stream, requestid, message, args=None): |
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parents:
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|
1329 """Called when a command encountered an error before sending output.""" |
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|
1330 ensureserverstream(stream) |
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|
1331 |
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|
1332 def sendframes(): |
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|
1333 for frame in createcommanderrorresponse( |
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|
1334 stream, requestid, message, args |
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|
1335 ): |
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|
1336 yield frame |
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|
1337 |
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|
1338 self._activecommands.remove(requestid) |
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|
1339 |
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|
1340 return self._handlesendframes(sendframes()) |
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|
1341 |
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|
1342 def makeoutputstream(self): |
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|
1343 """Create a stream to be used for sending data to the client. |
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|
1344 |
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|
1345 If this is called before protocol settings frames are received, we |
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|
1346 don't know what stream encodings are supported by the client and |
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|
1347 we will default to identity. |
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|
1348 """ |
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|
1349 streamid = self._nextoutgoingstreamid |
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|
1350 self._nextoutgoingstreamid += 2 |
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|
1351 |
40130
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parents:
40129
diff
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|
1352 s = outputstream(streamid) |
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|
1353 self._outgoingstreams[streamid] = s |
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|
1354 |
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|
1355 # Always use the *server's* preferred encoder over the client's, |
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|
1356 # as servers have more to lose from sub-optimal encoders being used. |
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|
1357 for name in STREAM_ENCODERS_ORDER: |
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|
1358 if name in self._sendersettings[b'contentencodings']: |
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|
1359 s.setencoder(self._ui, name) |
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|
1360 break |
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|
1361 |
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|
1362 return s |
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|
1363 |
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|
1364 def _makeerrorresult(self, msg): |
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|
1365 return b'error', { |
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|
1366 b'message': msg, |
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|
1367 } |
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|
1368 |
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|
1369 def _makeruncommandresult(self, requestid): |
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|
1370 entry = self._receivingcommands[requestid] |
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|
1371 |
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|
1372 if not entry[b'requestdone']: |
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|
1373 self._state = b'errored' |
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|
1374 raise error.ProgrammingError( |
43117
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cleanup: join string literals that are already on one line
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|
1375 b'should not be called without requestdone set' |
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|
1376 ) |
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|
1377 |
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|
1378 del self._receivingcommands[requestid] |
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|
1379 |
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|
1380 if self._receivingcommands: |
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|
1381 self._state = b'command-receiving' |
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|
1382 else: |
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|
1383 self._state = b'idle' |
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|
1384 |
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|
1385 # Decode the payloads as CBOR. |
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|
1386 entry[b'payload'].seek(0) |
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|
1387 request = cborutil.decodeall(entry[b'payload'].getvalue())[0] |
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|
1388 |
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|
1389 if b'name' not in request: |
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|
1390 self._state = b'errored' |
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|
1391 return self._makeerrorresult( |
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|
1392 _(b'command request missing "name" field') |
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|
1393 ) |
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|
1394 |
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|
1395 if b'args' not in request: |
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|
1396 request[b'args'] = {} |
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|
1397 |
37063
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|
1398 assert requestid not in self._activecommands |
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|
1399 self._activecommands.add(requestid) |
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|
1400 |
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1401 return ( |
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|
1402 b'runcommand', |
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1403 { |
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|
1404 b'requestid': requestid, |
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|
1405 b'command': request[b'name'], |
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1406 b'args': request[b'args'], |
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|
1407 b'redirect': request.get(b'redirect'), |
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|
1408 b'data': entry[b'data'].getvalue() if entry[b'data'] else None, |
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|
1409 }, |
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|
1410 ) |
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1411 |
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|
1412 def _makewantframeresult(self): |
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|
1413 return b'wantframe', { |
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|
1414 b'state': self._state, |
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|
1415 } |
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|
1416 |
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|
1417 def _validatecommandrequestframe(self, frame): |
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|
1418 new = frame.flags & FLAG_COMMAND_REQUEST_NEW |
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|
1419 continuation = frame.flags & FLAG_COMMAND_REQUEST_CONTINUATION |
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|
1420 |
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|
1421 if new and continuation: |
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1422 self._state = b'errored' |
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|
1423 return self._makeerrorresult( |
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|
1424 _( |
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|
1425 b'received command request frame with both new and ' |
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|
1426 b'continuation flags set' |
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|
1427 ) |
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|
1428 ) |
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|
1429 |
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|
1430 if not new and not continuation: |
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changeset
|
1431 self._state = b'errored' |
37292
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wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1432 return self._makeerrorresult( |
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2372284d9457
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parents:
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diff
changeset
|
1433 _( |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
43076
diff
changeset
|
1434 b'received command request frame with neither new nor ' |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
43076
diff
changeset
|
1435 b'continuation flags set' |
43076
2372284d9457
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parents:
40328
diff
changeset
|
1436 ) |
2372284d9457
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parents:
40328
diff
changeset
|
1437 ) |
37292
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37291
diff
changeset
|
1438 |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1439 def _onframeinitial(self, frame): |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1440 # 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
|
1441 if frame.typeid == FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: |
43077
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parents:
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diff
changeset
|
1442 self._state = b'protocol-settings-receiving' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1443 self._protocolsettingsdecoder = cborutil.bufferingdecoder() |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1444 return self._onframeprotocolsettings(frame) |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1445 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1446 elif frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
43077
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parents:
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diff
changeset
|
1447 self._state = b'idle' |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
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|
1448 return self._onframeidle(frame) |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1449 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
1450 else: |
43077
687b865b95ad
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parents:
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diff
changeset
|
1451 self._state = b'errored' |
40126
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
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|
1452 return self._makeerrorresult( |
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2372284d9457
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parents:
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diff
changeset
|
1453 _( |
43077
687b865b95ad
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parents:
43076
diff
changeset
|
1454 b'expected sender protocol settings or command request ' |
687b865b95ad
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parents:
43076
diff
changeset
|
1455 b'frame; got %d' |
43076
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40328
diff
changeset
|
1456 ) |
2372284d9457
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parents:
40328
diff
changeset
|
1457 % frame.typeid |
2372284d9457
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40328
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changeset
|
1458 ) |
40126
327d40b94bed
wireprotov2: handle sender protocol settings frames
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parents:
40125
diff
changeset
|
1459 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1460 def _onframeprotocolsettings(self, frame): |
43077
687b865b95ad
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parents:
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diff
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|
1461 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
|
1462 assert self._protocolsettingsdecoder is not None |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
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|
1463 |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1464 if frame.typeid != FRAME_TYPE_SENDER_PROTOCOL_SETTINGS: |
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diff
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|
1465 self._state = b'errored' |
40126
327d40b94bed
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|
1466 return self._makeerrorresult( |
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diff
changeset
|
1467 _(b'expected sender protocol settings frame; got %d') |
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changeset
|
1468 % frame.typeid |
2372284d9457
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diff
changeset
|
1469 ) |
40126
327d40b94bed
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changeset
|
1470 |
327d40b94bed
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diff
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|
1471 more = frame.flags & FLAG_SENDER_PROTOCOL_SETTINGS_CONTINUATION |
327d40b94bed
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diff
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|
1472 eos = frame.flags & FLAG_SENDER_PROTOCOL_SETTINGS_EOS |
327d40b94bed
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diff
changeset
|
1473 |
327d40b94bed
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changeset
|
1474 if more and eos: |
43077
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diff
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|
1475 self._state = b'errored' |
40126
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
1476 return self._makeerrorresult( |
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changeset
|
1477 _( |
43077
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diff
changeset
|
1478 b'sender protocol settings frame cannot have both ' |
687b865b95ad
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diff
changeset
|
1479 b'continuation and end of stream flags set' |
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40328
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changeset
|
1480 ) |
2372284d9457
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changeset
|
1481 ) |
40126
327d40b94bed
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|
1482 |
327d40b94bed
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40125
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changeset
|
1483 if not more and not eos: |
43077
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changeset
|
1484 self._state = b'errored' |
40126
327d40b94bed
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parents:
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|
1485 return self._makeerrorresult( |
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|
1486 _( |
43077
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|
1487 b'sender protocol settings frame must have continuation or ' |
687b865b95ad
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parents:
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diff
changeset
|
1488 b'end of stream flag set' |
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changeset
|
1489 ) |
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|
1490 ) |
40126
327d40b94bed
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changeset
|
1491 |
327d40b94bed
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40125
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changeset
|
1492 # TODO establish limits for maximum amount of data that can be |
327d40b94bed
wireprotov2: handle sender protocol settings frames
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40125
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changeset
|
1493 # buffered. |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
1494 try: |
327d40b94bed
wireprotov2: handle sender protocol settings frames
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
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changeset
|
1495 self._protocolsettingsdecoder.decode(frame.payload) |
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
40125
diff
changeset
|
1496 except Exception as e: |
43077
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changeset
|
1497 self._state = b'errored' |
40126
327d40b94bed
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changeset
|
1498 return self._makeerrorresult( |
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changeset
|
1499 _( |
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changeset
|
1500 b'error decoding CBOR from sender protocol settings frame: %s' |
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|
1501 ) |
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changeset
|
1502 % stringutil.forcebytestr(e) |
2372284d9457
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changeset
|
1503 ) |
40126
327d40b94bed
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40125
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changeset
|
1504 |
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
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40125
diff
changeset
|
1505 if more: |
327d40b94bed
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diff
changeset
|
1506 return self._makewantframeresult() |
327d40b94bed
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Gregory Szorc <gregory.szorc@gmail.com>
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40125
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changeset
|
1507 |
327d40b94bed
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40125
diff
changeset
|
1508 assert eos |
327d40b94bed
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parents:
40125
diff
changeset
|
1509 |
327d40b94bed
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changeset
|
1510 decoded = self._protocolsettingsdecoder.getavailable() |
327d40b94bed
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changeset
|
1511 self._protocolsettingsdecoder = None |
327d40b94bed
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changeset
|
1512 |
327d40b94bed
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changeset
|
1513 if not decoded: |
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changeset
|
1514 self._state = b'errored' |
40126
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|
1515 return self._makeerrorresult( |
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changeset
|
1516 _(b'sender protocol settings frame did not contain CBOR data') |
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|
1517 ) |
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327d40b94bed
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|
1518 elif len(decoded) > 1: |
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changeset
|
1519 self._state = b'errored' |
40126
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|
1520 return self._makeerrorresult( |
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|
1521 _( |
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|
1522 b'sender protocol settings frame contained multiple CBOR ' |
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changeset
|
1523 b'values' |
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changeset
|
1524 ) |
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|
1525 ) |
40126
327d40b94bed
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|
1526 |
327d40b94bed
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changeset
|
1527 d = decoded[0] |
327d40b94bed
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changeset
|
1528 |
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changeset
|
1529 if b'contentencodings' in d: |
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|
1530 self._sendersettings[b'contentencodings'] = d[b'contentencodings'] |
40126
327d40b94bed
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|
1531 |
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|
1532 self._state = b'idle' |
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327d40b94bed
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|
1533 |
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|
1534 return self._makewantframeresult() |
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|
1535 |
37061
884a0c1604ad
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Gregory Szorc <gregory.szorc@gmail.com>
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changeset
|
1536 def _onframeidle(self, frame): |
37052
8c3c47362934
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changeset
|
1537 # The only frame type that should be received in this state is a |
8c3c47362934
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diff
changeset
|
1538 # command request. |
37292
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changeset
|
1539 if frame.typeid != FRAME_TYPE_COMMAND_REQUEST: |
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|
1540 self._state = b'errored' |
37052
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diff
changeset
|
1541 return self._makeerrorresult( |
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changeset
|
1542 _(b'expected command request frame; got %d') % frame.typeid |
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|
1543 ) |
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3d0e2cd86e05
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37291
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changeset
|
1544 |
3d0e2cd86e05
wireproto: use CBOR for command requests
Gregory Szorc <gregory.szorc@gmail.com>
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37291
diff
changeset
|
1545 res = self._validatecommandrequestframe(frame) |
3d0e2cd86e05
wireproto: use CBOR for command requests
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37291
diff
changeset
|
1546 if res: |
3d0e2cd86e05
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diff
changeset
|
1547 return res |
37052
8c3c47362934
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diff
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|
1548 |
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|
1549 if frame.requestid in self._receivingcommands: |
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|
1550 self._state = b'errored' |
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|
1551 return self._makeerrorresult( |
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|
1552 _(b'request with ID %d already received') % frame.requestid |
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|
1553 ) |
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|
1554 |
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|
1555 if frame.requestid in self._activecommands: |
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|
1556 self._state = b'errored' |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
1557 return self._makeerrorresult( |
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|
1558 _(b'request with ID %d is already active') % frame.requestid |
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|
1559 ) |
37292
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|
1560 |
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|
1561 new = frame.flags & FLAG_COMMAND_REQUEST_NEW |
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|
1562 moreframes = frame.flags & FLAG_COMMAND_REQUEST_MORE_FRAMES |
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|
1563 expectingdata = frame.flags & FLAG_COMMAND_REQUEST_EXPECT_DATA |
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|
1564 |
37292
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Gregory Szorc <gregory.szorc@gmail.com>
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|
1565 if not new: |
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|
1566 self._state = b'errored' |
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|
1567 return self._makeerrorresult( |
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|
1568 _(b'received command request frame without new flag set') |
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|
1569 ) |
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|
1570 |
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|
1571 payload = util.bytesio() |
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|
1572 payload.write(frame.payload) |
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|
1573 |
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|
1574 self._receivingcommands[frame.requestid] = { |
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|
1575 b'payload': payload, |
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1576 b'data': None, |
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|
1577 b'requestdone': not moreframes, |
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|
1578 b'expectingdata': bool(expectingdata), |
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|
1579 } |
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|
1580 |
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|
1581 # This is the final frame for this request. Dispatch it. |
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|
1582 if not moreframes and not expectingdata: |
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|
1583 return self._makeruncommandresult(frame.requestid) |
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|
1584 |
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|
1585 assert moreframes or expectingdata |
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|
1586 self._state = b'command-receiving' |
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|
1587 return self._makewantframeresult() |
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|
1588 |
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|
1589 def _onframecommandreceiving(self, frame): |
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|
1590 if frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
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|
1591 # Process new command requests as such. |
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|
1592 if frame.flags & FLAG_COMMAND_REQUEST_NEW: |
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|
1593 return self._onframeidle(frame) |
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|
1594 |
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|
1595 res = self._validatecommandrequestframe(frame) |
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|
1596 if res: |
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|
1597 return res |
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|
1598 |
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|
1599 # All other frames should be related to a command that is currently |
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1600 # receiving but is not active. |
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|
1601 if frame.requestid in self._activecommands: |
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|
1602 self._state = b'errored' |
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|
1603 return self._makeerrorresult( |
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|
1604 _(b'received frame for request that is still active: %d') |
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|
1605 % frame.requestid |
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1606 ) |
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|
1607 |
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|
1608 if frame.requestid not in self._receivingcommands: |
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|
1609 self._state = b'errored' |
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|
1610 return self._makeerrorresult( |
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|
1611 _(b'received frame for request that is not receiving: %d') |
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|
1612 % frame.requestid |
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|
1613 ) |
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|
1614 |
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|
1615 entry = self._receivingcommands[frame.requestid] |
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|
1616 |
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|
1617 if frame.typeid == FRAME_TYPE_COMMAND_REQUEST: |
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|
1618 moreframes = frame.flags & FLAG_COMMAND_REQUEST_MORE_FRAMES |
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|
1619 expectingdata = bool(frame.flags & FLAG_COMMAND_REQUEST_EXPECT_DATA) |
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1620 |
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1621 if entry[b'requestdone']: |
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|
1622 self._state = b'errored' |
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1623 return self._makeerrorresult( |
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1624 _( |
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1625 b'received command request frame when request frames ' |
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|
1626 b'were supposedly done' |
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|
1627 ) |
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|
1628 ) |
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1629 |
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|
1630 if expectingdata != entry[b'expectingdata']: |
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1631 self._state = b'errored' |
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|
1632 return self._makeerrorresult( |
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1633 _(b'mismatch between expect data flag and previous frame') |
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1634 ) |
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1635 |
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1636 entry[b'payload'].write(frame.payload) |
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|
1637 |
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|
1638 if not moreframes: |
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|
1639 entry[b'requestdone'] = True |
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|
1640 |
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|
1641 if not moreframes and not expectingdata: |
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|
1642 return self._makeruncommandresult(frame.requestid) |
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|
1643 |
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|
1644 return self._makewantframeresult() |
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|
1645 |
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|
1646 elif frame.typeid == FRAME_TYPE_COMMAND_DATA: |
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|
1647 if not entry[b'expectingdata']: |
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|
1648 self._state = b'errored' |
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|
1649 return self._makeerrorresult( |
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|
1650 _( |
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|
1651 b'received command data frame for request that is not ' |
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|
1652 b'expecting data: %d' |
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|
1653 ) |
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|
1654 % frame.requestid |
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1655 ) |
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|
1656 |
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|
1657 if entry[b'data'] is None: |
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|
1658 entry[b'data'] = util.bytesio() |
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|
1659 |
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|
1660 return self._handlecommanddataframe(frame, entry) |
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|
1661 else: |
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1662 self._state = b'errored' |
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1663 return self._makeerrorresult( |
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1664 _(b'received unexpected frame type: %d') % frame.typeid |
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1665 ) |
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1666 |
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1667 def _handlecommanddataframe(self, frame, entry): |
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1668 assert frame.typeid == FRAME_TYPE_COMMAND_DATA |
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1669 |
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1670 # TODO support streaming data instead of buffering it. |
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1671 entry[b'data'].write(frame.payload) |
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1672 |
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1673 if frame.flags & FLAG_COMMAND_DATA_CONTINUATION: |
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1674 return self._makewantframeresult() |
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1675 elif frame.flags & FLAG_COMMAND_DATA_EOS: |
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1676 entry[b'data'].seek(0) |
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1677 return self._makeruncommandresult(frame.requestid) |
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1678 else: |
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1679 self._state = b'errored' |
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1680 return self._makeerrorresult(_(b'command data frame without flags')) |
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1681 |
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1682 def _onframeerrored(self, frame): |
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1683 return self._makeerrorresult(_(b'server already errored')) |
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1684 |
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1685 |
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1686 class commandrequest: |
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1687 """Represents a request to run a command.""" |
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1688 |
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1689 def __init__(self, requestid, name, args, datafh=None, redirect=None): |
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1690 self.requestid = requestid |
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1691 self.name = name |
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1692 self.args = args |
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1693 self.datafh = datafh |
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1694 self.redirect = redirect |
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1695 self.state = b'pending' |
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1696 |
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1697 |
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1698 class clientreactor: |
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1699 """Holds state of a client issuing frame-based protocol requests. |
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1700 |
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1701 This is like ``serverreactor`` but for client-side state. |
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1702 |
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1703 Each instance is bound to the lifetime of a connection. For persistent |
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1704 connection transports using e.g. TCP sockets and speaking the raw |
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1705 framing protocol, there will be a single instance for the lifetime of |
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1706 the TCP socket. For transports where there are multiple discrete |
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1707 interactions (say tunneled within in HTTP request), there will be a |
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1708 separate instance for each distinct interaction. |
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1709 |
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1710 Consumers are expected to tell instances when events occur by calling |
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1711 various methods. These methods return a 2-tuple describing any follow-up |
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1712 action(s) to take. The first element is the name of an action to |
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1713 perform. The second is a data structure (usually a dict) specific to |
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1714 that action that contains more information. e.g. if the reactor wants |
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1715 to send frames to the server, the data structure will contain a reference |
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1716 to those frames. |
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1717 |
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1718 Valid actions that consumers can be instructed to take are: |
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1719 |
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1720 noop |
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1721 Indicates no additional action is required. |
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1722 |
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1723 sendframes |
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1724 Indicates that frames should be sent to the server. The ``framegen`` |
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1725 key contains a generator of frames that should be sent. The reactor |
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1726 assumes that all frames in this generator are sent to the server. |
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1727 |
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1728 error |
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1729 Indicates that an error occurred. The ``message`` key contains an |
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1730 error message describing the failure. |
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1731 |
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1732 responsedata |
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1733 Indicates a response to a previously-issued command was received. |
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1734 |
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1735 The ``request`` key contains the ``commandrequest`` instance that |
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1736 represents the request this data is for. |
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1737 |
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1738 The ``data`` key contains the decoded data from the server. |
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1739 |
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1740 ``expectmore`` and ``eos`` evaluate to True when more response data |
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1741 is expected to follow or we're at the end of the response stream, |
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1742 respectively. |
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1743 """ |
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1744 |
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1745 def __init__( |
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1746 self, |
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1747 ui, |
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1748 hasmultiplesend=False, |
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1749 buffersends=True, |
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1750 clientcontentencoders=None, |
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1751 ): |
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1752 """Create a new instance. |
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1753 |
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1754 ``hasmultiplesend`` indicates whether multiple sends are supported |
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1755 by the transport. When True, it is possible to send commands immediately |
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1756 instead of buffering until the caller signals an intent to finish a |
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1757 send operation. |
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1758 |
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1759 ``buffercommands`` indicates whether sends should be buffered until the |
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1760 last request has been issued. |
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1761 |
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1762 ``clientcontentencoders`` is an iterable of content encoders the client |
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1763 will advertise to the server and that the server can use for encoding |
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1764 data. If not defined, the client will not advertise content encoders |
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1765 to the server. |
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1766 """ |
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1767 self._ui = ui |
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1768 self._hasmultiplesend = hasmultiplesend |
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1769 self._buffersends = buffersends |
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1770 self._clientcontentencoders = clientcontentencoders |
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1771 |
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1772 self._canissuecommands = True |
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1773 self._cansend = True |
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1774 self._protocolsettingssent = False |
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1775 |
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1776 self._nextrequestid = 1 |
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1777 # We only support a single outgoing stream for now. |
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1778 self._outgoingstream = outputstream(1) |
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1779 self._pendingrequests = collections.deque() |
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1780 self._activerequests = {} |
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1781 self._incomingstreams = {} |
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1782 self._streamsettingsdecoders = {} |
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1783 |
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1784 populatestreamencoders() |
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1785 |
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1786 def callcommand(self, name, args, datafh=None, redirect=None): |
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1787 """Request that a command be executed. |
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1788 |
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1789 Receives the command name, a dict of arguments to pass to the command, |
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1790 and an optional file object containing the raw data for the command. |
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1791 |
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1792 Returns a 3-tuple of (request, action, action data). |
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1793 """ |
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1794 if not self._canissuecommands: |
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1795 raise error.ProgrammingError(b'cannot issue new commands') |
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1796 |
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1797 requestid = self._nextrequestid |
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1798 self._nextrequestid += 2 |
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1799 |
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1800 request = commandrequest( |
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1801 requestid, name, args, datafh=datafh, redirect=redirect |
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1802 ) |
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1803 |
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1804 if self._buffersends: |
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1805 self._pendingrequests.append(request) |
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1806 return request, b'noop', {} |
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1807 else: |
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1808 if not self._cansend: |
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1809 raise error.ProgrammingError( |
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1810 b'sends cannot be performed on this instance' |
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1811 ) |
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1812 |
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1813 if not self._hasmultiplesend: |
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1814 self._cansend = False |
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1815 self._canissuecommands = False |
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1816 |
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1817 return ( |
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1818 request, |
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1819 b'sendframes', |
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1820 { |
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1821 b'framegen': self._makecommandframes(request), |
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1822 }, |
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1823 ) |
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1824 |
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1825 def flushcommands(self): |
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1826 """Request that all queued commands be sent. |
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1827 |
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1828 If any commands are buffered, this will instruct the caller to send |
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1829 them over the wire. If no commands are buffered it instructs the client |
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1830 to no-op. |
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1831 |
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1832 If instances aren't configured for multiple sends, no new command |
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1833 requests are allowed after this is called. |
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1834 """ |
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1835 if not self._pendingrequests: |
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1836 return b'noop', {} |
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1837 |
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1838 if not self._cansend: |
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1839 raise error.ProgrammingError( |
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1840 b'sends cannot be performed on this instance' |
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1841 ) |
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1842 |
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1843 # If the instance only allows sending once, mark that we have fired |
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1844 # our one shot. |
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1845 if not self._hasmultiplesend: |
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1846 self._canissuecommands = False |
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1847 self._cansend = False |
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1848 |
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1849 def makeframes(): |
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1850 while self._pendingrequests: |
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1851 request = self._pendingrequests.popleft() |
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1852 for frame in self._makecommandframes(request): |
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1853 yield frame |
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1854 |
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1855 return b'sendframes', { |
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1856 b'framegen': makeframes(), |
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1857 } |
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1858 |
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1859 def _makecommandframes(self, request): |
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1860 """Emit frames to issue a command request. |
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1861 |
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1862 As a side-effect, update request accounting to reflect its changed |
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1863 state. |
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1864 """ |
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1865 self._activerequests[request.requestid] = request |
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1866 request.state = b'sending' |
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1867 |
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1868 if not self._protocolsettingssent and self._clientcontentencoders: |
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1869 self._protocolsettingssent = True |
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1870 |
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1871 payload = b''.join( |
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1872 cborutil.streamencode( |
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1873 { |
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1874 b'contentencodings': self._clientcontentencoders, |
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1875 } |
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1876 ) |
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1877 ) |
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1878 |
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1879 yield self._outgoingstream.makeframe( |
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1880 requestid=request.requestid, |
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1881 typeid=FRAME_TYPE_SENDER_PROTOCOL_SETTINGS, |
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1882 flags=FLAG_SENDER_PROTOCOL_SETTINGS_EOS, |
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1883 payload=payload, |
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1884 ) |
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1885 |
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1886 res = createcommandframes( |
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1887 self._outgoingstream, |
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1888 request.requestid, |
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1889 request.name, |
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1890 request.args, |
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1891 datafh=request.datafh, |
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1892 redirect=request.redirect, |
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1893 ) |
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1894 |
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1895 for frame in res: |
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1896 yield frame |
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1897 |
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|
1898 request.state = b'sent' |
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1899 |
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1900 def onframerecv(self, frame): |
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1901 """Process a frame that has been received off the wire. |
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1902 |
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1903 Returns a 2-tuple of (action, meta) describing further action the |
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1904 caller needs to take as a result of receiving this frame. |
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1905 """ |
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1906 if frame.streamid % 2: |
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1907 return ( |
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1908 b'error', |
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1909 { |
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1910 b'message': ( |
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1911 _(b'received frame with odd numbered stream ID: %d') |
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1912 % frame.streamid |
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1913 ), |
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1914 }, |
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1915 ) |
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1916 |
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1917 if frame.streamid not in self._incomingstreams: |
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1918 if not frame.streamflags & STREAM_FLAG_BEGIN_STREAM: |
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1919 return ( |
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1920 b'error', |
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1921 { |
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1922 b'message': _( |
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1923 b'received frame on unknown stream ' |
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1924 b'without beginning of stream flag set' |
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1925 ), |
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1926 }, |
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1927 ) |
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1928 |
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1929 self._incomingstreams[frame.streamid] = inputstream(frame.streamid) |
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1930 |
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1931 stream = self._incomingstreams[frame.streamid] |
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1932 |
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1933 # If the payload is encoded, ask the stream to decode it. We |
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1934 # merely substitute the decoded result into the frame payload as |
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1935 # if it had been transferred all along. |
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1936 if frame.streamflags & STREAM_FLAG_ENCODING_APPLIED: |
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1937 frame.payload = stream.decode(frame.payload) |
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1938 |
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1939 if frame.streamflags & STREAM_FLAG_END_STREAM: |
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1940 del self._incomingstreams[frame.streamid] |
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1941 |
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1942 if frame.typeid == FRAME_TYPE_STREAM_SETTINGS: |
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1943 return self._onstreamsettingsframe(frame) |
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1944 |
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1945 if frame.requestid not in self._activerequests: |
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1946 return ( |
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1947 b'error', |
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1948 { |
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1949 b'message': ( |
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1950 _(b'received frame for inactive request ID: %d') |
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1951 % frame.requestid |
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1952 ), |
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1953 }, |
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1954 ) |
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1955 |
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1956 request = self._activerequests[frame.requestid] |
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1957 request.state = b'receiving' |
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1958 |
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|
1959 handlers = { |
37724
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|
1960 FRAME_TYPE_COMMAND_RESPONSE: self._oncommandresponseframe, |
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|
1961 FRAME_TYPE_ERROR_RESPONSE: self._onerrorresponseframe, |
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|
1962 } |
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|
1963 |
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|
1964 meth = handlers.get(frame.typeid) |
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|
1965 if not meth: |
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|
1966 raise error.ProgrammingError( |
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1967 b'unhandled frame type: %d' % frame.typeid |
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|
1968 ) |
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|
1969 |
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|
1970 return meth(request, frame) |
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|
1971 |
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|
1972 def _onstreamsettingsframe(self, frame): |
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|
1973 assert frame.typeid == FRAME_TYPE_STREAM_SETTINGS |
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|
1974 |
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|
1975 more = frame.flags & FLAG_STREAM_ENCODING_SETTINGS_CONTINUATION |
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|
1976 eos = frame.flags & FLAG_STREAM_ENCODING_SETTINGS_EOS |
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|
1977 |
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|
1978 if more and eos: |
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changeset
|
1979 return ( |
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changeset
|
1980 b'error', |
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changeset
|
1981 { |
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changeset
|
1982 b'message': ( |
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changeset
|
1983 _( |
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|
1984 b'stream encoding settings frame cannot have both ' |
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|
1985 b'continuation and end of stream flags set' |
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changeset
|
1986 ) |
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changeset
|
1987 ), |
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changeset
|
1988 }, |
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changeset
|
1989 ) |
40128
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changeset
|
1990 |
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changeset
|
1991 if not more and not eos: |
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changeset
|
1992 return ( |
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changeset
|
1993 b'error', |
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changeset
|
1994 { |
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changeset
|
1995 b'message': _( |
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changeset
|
1996 b'stream encoding settings frame must have ' |
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changeset
|
1997 b'continuation or end of stream flag set' |
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changeset
|
1998 ), |
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changeset
|
1999 }, |
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changeset
|
2000 ) |
40128
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|
2001 |
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changeset
|
2002 if frame.streamid not in self._streamsettingsdecoders: |
57782791b7e9
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changeset
|
2003 decoder = cborutil.bufferingdecoder() |
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changeset
|
2004 self._streamsettingsdecoders[frame.streamid] = decoder |
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parents:
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changeset
|
2005 |
57782791b7e9
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changeset
|
2006 decoder = self._streamsettingsdecoders[frame.streamid] |
57782791b7e9
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|
2007 |
57782791b7e9
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parents:
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changeset
|
2008 try: |
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changeset
|
2009 decoder.decode(frame.payload) |
57782791b7e9
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parents:
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changeset
|
2010 except Exception as e: |
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changeset
|
2011 return ( |
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changeset
|
2012 b'error', |
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changeset
|
2013 { |
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changeset
|
2014 b'message': ( |
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changeset
|
2015 _( |
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|
2016 b'error decoding CBOR from stream encoding ' |
687b865b95ad
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parents:
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changeset
|
2017 b'settings frame: %s' |
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2018 ) |
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2019 % stringutil.forcebytestr(e) |
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2020 ), |
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2021 }, |
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2022 ) |
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2023 |
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2024 if more: |
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2025 return b'noop', {} |
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2026 |
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2027 assert eos |
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2028 |
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2029 decoded = decoder.getavailable() |
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2030 del self._streamsettingsdecoders[frame.streamid] |
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2031 |
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2032 if not decoded: |
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2033 return ( |
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2034 b'error', |
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2035 { |
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2036 b'message': _( |
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2037 b'stream encoding settings frame did not contain ' |
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2038 b'CBOR data' |
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2039 ), |
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2040 }, |
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2041 ) |
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2042 |
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2043 try: |
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2044 self._incomingstreams[frame.streamid].setdecoder( |
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2045 self._ui, decoded[0], decoded[1:] |
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2046 ) |
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2047 except Exception as e: |
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2048 return ( |
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2049 b'error', |
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2050 { |
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2051 b'message': ( |
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2052 _(b'error setting stream decoder: %s') |
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2053 % stringutil.forcebytestr(e) |
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2054 ), |
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2055 }, |
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2056 ) |
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2057 |
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2058 return b'noop', {} |
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2059 |
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2060 def _oncommandresponseframe(self, request, frame): |
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2061 if frame.flags & FLAG_COMMAND_RESPONSE_EOS: |
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2062 request.state = b'received' |
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2063 del self._activerequests[request.requestid] |
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2064 |
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2065 return ( |
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2066 b'responsedata', |
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2067 { |
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2068 b'request': request, |
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2069 b'expectmore': frame.flags & FLAG_COMMAND_RESPONSE_CONTINUATION, |
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2070 b'eos': frame.flags & FLAG_COMMAND_RESPONSE_EOS, |
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2071 b'data': frame.payload, |
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2072 }, |
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2073 ) |
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2074 |
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2075 def _onerrorresponseframe(self, request, frame): |
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2076 request.state = b'errored' |
37726
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|
2077 del self._activerequests[request.requestid] |
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|
2078 |
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|
2079 # The payload should be a CBOR map. |
39446
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2080 m = cborutil.decodeall(frame.payload)[0] |
37726
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2081 |
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2082 return ( |
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|
2083 b'error', |
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2084 { |
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2085 b'request': request, |
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|
2086 b'type': m[b'type'], |
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|
2087 b'message': m[b'message'], |
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|
2088 }, |
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|
2089 ) |