Mercurial > hg
annotate mercurial/httppeer.py @ 46967:314386a19cff
help: prepend environment variables used in hooks with "$"
Most of them have "$" prefix but some don't, so adding it for consistency.
Differential Revision: https://phab.mercurial-scm.org/D10398
author | Aay Jay Chan <aayjaychan@itopia.com.hk> |
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date | Thu, 01 Apr 2021 22:43:55 +0800 |
parents | ffd3e823a7e5 |
children | 04688c51f81f |
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peer: introduce real peer classes
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1 # httppeer.py - HTTP repository proxy classes for mercurial |
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2 # |
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3 # Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com> |
2859 | 4 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> |
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5 # |
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6 # This software may be used and distributed according to the terms of the |
10263 | 7 # GNU General Public License version 2 or any later version. |
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8 |
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9 from __future__ import absolute_import |
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10 |
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11 import errno |
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12 import io |
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13 import os |
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14 import socket |
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15 import struct |
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16 import weakref |
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17 |
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18 from .i18n import _ |
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19 from .pycompat import getattr |
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20 from . import ( |
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21 bundle2, |
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22 error, |
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23 httpconnection, |
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24 pycompat, |
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25 statichttprepo, |
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26 url as urlmod, |
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27 util, |
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28 wireprotoframing, |
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29 wireprototypes, |
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30 wireprotov1peer, |
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31 wireprotov2peer, |
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32 wireprotov2server, |
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33 ) |
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34 from .interfaces import ( |
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35 repository, |
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36 util as interfaceutil, |
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37 ) |
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38 from .utils import ( |
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39 cborutil, |
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40 stringutil, |
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41 urlutil, |
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42 ) |
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43 |
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44 httplib = util.httplib |
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45 urlerr = util.urlerr |
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46 urlreq = util.urlreq |
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47 |
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48 |
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49 def encodevalueinheaders(value, header, limit): |
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50 """Encode a string value into multiple HTTP headers. |
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51 |
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52 ``value`` will be encoded into 1 or more HTTP headers with the names |
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53 ``header-<N>`` where ``<N>`` is an integer starting at 1. Each header |
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54 name + value will be at most ``limit`` bytes long. |
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55 |
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56 Returns an iterable of 2-tuples consisting of header names and |
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57 values as native strings. |
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58 """ |
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59 # HTTP Headers are ASCII. Python 3 requires them to be unicodes, |
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60 # not bytes. This function always takes bytes in as arguments. |
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61 fmt = pycompat.strurl(header) + r'-%s' |
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62 # Note: it is *NOT* a bug that the last bit here is a bytestring |
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63 # and not a unicode: we're just getting the encoded length anyway, |
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64 # and using an r-string to make it portable between Python 2 and 3 |
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65 # doesn't work because then the \r is a literal backslash-r |
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66 # instead of a carriage return. |
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67 valuelen = limit - len(fmt % '000') - len(b': \r\n') |
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68 result = [] |
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69 |
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70 n = 0 |
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71 for i in pycompat.xrange(0, len(value), valuelen): |
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72 n += 1 |
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73 result.append((fmt % str(n), pycompat.strurl(value[i : i + valuelen]))) |
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74 |
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75 return result |
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76 |
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77 |
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78 class _multifile(object): |
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79 def __init__(self, *fileobjs): |
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80 for f in fileobjs: |
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81 if not util.safehasattr(f, b'length'): |
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82 raise ValueError( |
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83 b'_multifile only supports file objects that ' |
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84 b'have a length but this one does not:', |
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85 type(f), |
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86 f, |
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87 ) |
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88 self._fileobjs = fileobjs |
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89 self._index = 0 |
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90 |
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91 @property |
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92 def length(self): |
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93 return sum(f.length for f in self._fileobjs) |
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94 |
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95 def read(self, amt=None): |
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96 if amt <= 0: |
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97 return b''.join(f.read() for f in self._fileobjs) |
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98 parts = [] |
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99 while amt and self._index < len(self._fileobjs): |
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100 parts.append(self._fileobjs[self._index].read(amt)) |
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101 got = len(parts[-1]) |
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102 if got < amt: |
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103 self._index += 1 |
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104 amt -= got |
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105 return b''.join(parts) |
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106 |
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107 def seek(self, offset, whence=os.SEEK_SET): |
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108 if whence != os.SEEK_SET: |
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109 raise NotImplementedError( |
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110 b'_multifile does not support anything other' |
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111 b' than os.SEEK_SET for whence on seek()' |
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112 ) |
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113 if offset != 0: |
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114 raise NotImplementedError( |
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115 b'_multifile only supports seeking to start, but that ' |
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116 b'could be fixed if you need it' |
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117 ) |
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118 for f in self._fileobjs: |
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119 f.seek(0) |
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120 self._index = 0 |
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121 |
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122 |
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123 def makev1commandrequest( |
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124 ui, requestbuilder, caps, capablefn, repobaseurl, cmd, args |
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125 ): |
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126 """Make an HTTP request to run a command for a version 1 client. |
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127 |
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128 ``caps`` is a set of known server capabilities. The value may be |
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129 None if capabilities are not yet known. |
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130 |
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131 ``capablefn`` is a function to evaluate a capability. |
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132 |
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133 ``cmd``, ``args``, and ``data`` define the command, its arguments, and |
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134 raw data to pass to it. |
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135 """ |
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136 if cmd == b'pushkey': |
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137 args[b'data'] = b'' |
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138 data = args.pop(b'data', None) |
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139 headers = args.pop(b'headers', {}) |
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140 |
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141 ui.debug(b"sending %s command\n" % cmd) |
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142 q = [(b'cmd', cmd)] |
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143 headersize = 0 |
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144 # Important: don't use self.capable() here or else you end up |
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145 # with infinite recursion when trying to look up capabilities |
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146 # for the first time. |
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147 postargsok = caps is not None and b'httppostargs' in caps |
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148 |
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149 # Send arguments via POST. |
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150 if postargsok and args: |
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151 strargs = urlreq.urlencode(sorted(args.items())) |
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152 if not data: |
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153 data = strargs |
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154 else: |
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155 if isinstance(data, bytes): |
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156 i = io.BytesIO(data) |
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157 i.length = len(data) |
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158 data = i |
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159 argsio = io.BytesIO(strargs) |
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160 argsio.length = len(strargs) |
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161 data = _multifile(argsio, data) |
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162 headers['X-HgArgs-Post'] = len(strargs) |
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163 elif args: |
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164 # Calling self.capable() can infinite loop if we are calling |
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165 # "capabilities". But that command should never accept wire |
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166 # protocol arguments. So this should never happen. |
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167 assert cmd != b'capabilities' |
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168 httpheader = capablefn(b'httpheader') |
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169 if httpheader: |
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170 headersize = int(httpheader.split(b',', 1)[0]) |
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171 |
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172 # Send arguments via HTTP headers. |
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173 if headersize > 0: |
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174 # The headers can typically carry more data than the URL. |
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175 encoded_args = urlreq.urlencode(sorted(args.items())) |
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176 for header, value in encodevalueinheaders( |
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177 encoded_args, b'X-HgArg', headersize |
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178 ): |
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179 headers[header] = value |
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180 # Send arguments via query string (Mercurial <1.9). |
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181 else: |
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182 q += sorted(args.items()) |
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183 |
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184 qs = b'?%s' % urlreq.urlencode(q) |
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185 cu = b"%s%s" % (repobaseurl, qs) |
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186 size = 0 |
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187 if util.safehasattr(data, b'length'): |
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188 size = data.length |
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189 elif data is not None: |
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190 size = len(data) |
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191 if data is not None and 'Content-Type' not in headers: |
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192 headers['Content-Type'] = 'application/mercurial-0.1' |
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193 |
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194 # Tell the server we accept application/mercurial-0.2 and multiple |
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195 # compression formats if the server is capable of emitting those |
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196 # payloads. |
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197 # Note: Keep this set empty by default, as client advertisement of |
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198 # protocol parameters should only occur after the handshake. |
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199 protoparams = set() |
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200 |
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201 mediatypes = set() |
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202 if caps is not None: |
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203 mt = capablefn(b'httpmediatype') |
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204 if mt: |
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205 protoparams.add(b'0.1') |
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206 mediatypes = set(mt.split(b',')) |
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207 |
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208 protoparams.add(b'partial-pull') |
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209 |
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210 if b'0.2tx' in mediatypes: |
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211 protoparams.add(b'0.2') |
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212 |
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213 if b'0.2tx' in mediatypes and capablefn(b'compression'): |
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214 # We /could/ compare supported compression formats and prune |
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215 # non-mutually supported or error if nothing is mutually supported. |
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216 # For now, send the full list to the server and have it error. |
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217 comps = [ |
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218 e.wireprotosupport().name |
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219 for e in util.compengines.supportedwireengines(util.CLIENTROLE) |
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220 ] |
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221 protoparams.add(b'comp=%s' % b','.join(comps)) |
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222 |
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223 if protoparams: |
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224 protoheaders = encodevalueinheaders( |
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225 b' '.join(sorted(protoparams)), b'X-HgProto', headersize or 1024 |
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226 ) |
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227 for header, value in protoheaders: |
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228 headers[header] = value |
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229 |
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230 varyheaders = [] |
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231 for header in headers: |
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232 if header.lower().startswith('x-hg'): |
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233 varyheaders.append(header) |
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234 |
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235 if varyheaders: |
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236 headers['Vary'] = ','.join(sorted(varyheaders)) |
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237 |
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238 req = requestbuilder(pycompat.strurl(cu), data, headers) |
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239 |
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240 if data is not None: |
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241 ui.debug(b"sending %d bytes\n" % size) |
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242 req.add_unredirected_header('Content-Length', '%d' % size) |
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243 |
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244 return req, cu, qs |
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245 |
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246 |
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247 def _reqdata(req): |
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248 """Get request data, if any. If no data, returns None.""" |
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249 if pycompat.ispy3: |
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250 return req.data |
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251 if not req.has_data(): |
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252 return None |
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253 return req.get_data() |
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254 |
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255 |
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256 def sendrequest(ui, opener, req): |
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257 """Send a prepared HTTP request. |
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258 |
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259 Returns the response object. |
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260 """ |
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261 dbg = ui.debug |
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262 if ui.debugflag and ui.configbool(b'devel', b'debug.peer-request'): |
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263 line = b'devel-peer-request: %s\n' |
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264 dbg( |
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265 line |
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266 % b'%s %s' |
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267 % ( |
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268 pycompat.bytesurl(req.get_method()), |
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269 pycompat.bytesurl(req.get_full_url()), |
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270 ) |
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271 ) |
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272 hgargssize = None |
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273 |
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274 for header, value in sorted(req.header_items()): |
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275 header = pycompat.bytesurl(header) |
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276 value = pycompat.bytesurl(value) |
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277 if header.startswith(b'X-hgarg-'): |
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278 if hgargssize is None: |
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279 hgargssize = 0 |
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280 hgargssize += len(value) |
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281 else: |
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282 dbg(line % b' %s %s' % (header, value)) |
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283 |
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284 if hgargssize is not None: |
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285 dbg( |
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286 line |
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287 % b' %d bytes of commands arguments in headers' |
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288 % hgargssize |
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289 ) |
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290 data = _reqdata(req) |
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291 if data is not None: |
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292 length = getattr(data, 'length', None) |
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293 if length is None: |
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294 length = len(data) |
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295 dbg(line % b' %d bytes of data' % length) |
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296 |
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297 start = util.timer() |
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298 |
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299 res = None |
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300 try: |
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301 res = opener.open(req) |
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302 except urlerr.httperror as inst: |
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303 if inst.code == 401: |
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304 raise error.Abort(_(b'authorization failed')) |
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305 raise |
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306 except httplib.HTTPException as inst: |
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307 ui.debug( |
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308 b'http error requesting %s\n' |
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309 % urlutil.hidepassword(req.get_full_url()) |
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310 ) |
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311 ui.traceback() |
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312 raise IOError(None, inst) |
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313 finally: |
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314 if ui.debugflag and ui.configbool(b'devel', b'debug.peer-request'): |
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315 code = res.code if res else -1 |
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316 dbg( |
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317 line |
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318 % b' finished in %.4f seconds (%d)' |
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319 % (util.timer() - start, code) |
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320 ) |
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321 |
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322 # Insert error handlers for common I/O failures. |
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323 urlmod.wrapresponse(res) |
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324 |
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325 return res |
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326 |
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327 |
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328 class RedirectedRepoError(error.RepoError): |
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329 def __init__(self, msg, respurl): |
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330 super(RedirectedRepoError, self).__init__(msg) |
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331 self.respurl = respurl |
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332 |
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333 |
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334 def parsev1commandresponse( |
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335 ui, baseurl, requrl, qs, resp, compressible, allowcbor=False |
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336 ): |
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337 # record the url we got redirected to |
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338 redirected = False |
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339 respurl = pycompat.bytesurl(resp.geturl()) |
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340 if respurl.endswith(qs): |
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341 respurl = respurl[: -len(qs)] |
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342 qsdropped = False |
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343 else: |
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344 qsdropped = True |
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345 |
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346 if baseurl.rstrip(b'/') != respurl.rstrip(b'/'): |
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347 redirected = True |
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348 if not ui.quiet: |
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349 ui.warn(_(b'real URL is %s\n') % respurl) |
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350 |
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351 try: |
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352 proto = pycompat.bytesurl(resp.getheader('content-type', '')) |
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353 except AttributeError: |
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354 proto = pycompat.bytesurl(resp.headers.get('content-type', '')) |
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355 |
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356 safeurl = urlutil.hidepassword(baseurl) |
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357 if proto.startswith(b'application/hg-error'): |
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358 raise error.OutOfBandError(resp.read()) |
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359 |
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360 # Pre 1.0 versions of Mercurial used text/plain and |
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361 # application/hg-changegroup. We don't support such old servers. |
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362 if not proto.startswith(b'application/mercurial-'): |
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363 ui.debug(b"requested URL: '%s'\n" % urlutil.hidepassword(requrl)) |
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364 msg = _( |
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365 b"'%s' does not appear to be an hg repository:\n" |
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366 b"---%%<--- (%s)\n%s\n---%%<---\n" |
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367 ) % (safeurl, proto or b'no content-type', resp.read(1024)) |
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368 |
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369 # Some servers may strip the query string from the redirect. We |
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370 # raise a special error type so callers can react to this specially. |
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371 if redirected and qsdropped: |
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372 raise RedirectedRepoError(msg, respurl) |
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373 else: |
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374 raise error.RepoError(msg) |
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375 |
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376 try: |
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377 subtype = proto.split(b'-', 1)[1] |
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378 |
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379 # Unless we end up supporting CBOR in the legacy wire protocol, |
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380 # this should ONLY be encountered for the initial capabilities |
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381 # request during handshake. |
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382 if subtype == b'cbor': |
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383 if allowcbor: |
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384 return respurl, proto, resp |
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385 else: |
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386 raise error.RepoError( |
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387 _(b'unexpected CBOR response from server') |
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388 ) |
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389 |
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390 version_info = tuple([int(n) for n in subtype.split(b'.')]) |
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391 except ValueError: |
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392 raise error.RepoError( |
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393 _(b"'%s' sent a broken Content-Type header (%s)") % (safeurl, proto) |
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394 ) |
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395 |
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396 # TODO consider switching to a decompression reader that uses |
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397 # generators. |
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398 if version_info == (0, 1): |
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399 if compressible: |
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400 resp = util.compengines[b'zlib'].decompressorreader(resp) |
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401 |
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402 elif version_info == (0, 2): |
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403 # application/mercurial-0.2 always identifies the compression |
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404 # engine in the payload header. |
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405 elen = struct.unpack(b'B', util.readexactly(resp, 1))[0] |
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406 ename = util.readexactly(resp, elen) |
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407 engine = util.compengines.forwiretype(ename) |
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408 |
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409 resp = engine.decompressorreader(resp) |
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410 else: |
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411 raise error.RepoError( |
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412 _(b"'%s' uses newer protocol %s") % (safeurl, subtype) |
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413 ) |
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414 |
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415 return respurl, proto, resp |
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416 |
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417 |
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418 class httppeer(wireprotov1peer.wirepeer): |
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419 def __init__(self, ui, path, url, opener, requestbuilder, caps): |
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420 self.ui = ui |
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421 self._path = path |
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422 self._url = url |
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423 self._caps = caps |
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424 self.limitedarguments = caps is not None and b'httppostargs' not in caps |
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425 self._urlopener = opener |
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426 self._requestbuilder = requestbuilder |
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427 |
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428 def __del__(self): |
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429 for h in self._urlopener.handlers: |
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430 h.close() |
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431 getattr(h, "close_all", lambda: None)() |
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432 |
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433 # Begin of ipeerconnection interface. |
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434 |
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435 def url(self): |
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436 return self._path |
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437 |
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438 def local(self): |
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439 return None |
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440 |
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441 def peer(self): |
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442 return self |
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443 |
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444 def canpush(self): |
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445 return True |
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446 |
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447 def close(self): |
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448 try: |
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449 reqs, sent, recv = ( |
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450 self._urlopener.requestscount, |
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451 self._urlopener.sentbytescount, |
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452 self._urlopener.receivedbytescount, |
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453 ) |
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454 except AttributeError: |
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455 return |
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456 self.ui.note( |
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457 _( |
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458 b'(sent %d HTTP requests and %d bytes; ' |
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459 b'received %d bytes in responses)\n' |
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parents:
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|
460 ) |
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|
461 % (reqs, sent, recv) |
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|
462 ) |
13603
395a84f78736
httprepo: use caps instead of between for compat check
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
13555
diff
changeset
|
463 |
37320
39f7d4ee8bcd
repository: port peer interfaces to zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37006
diff
changeset
|
464 # End of ipeerconnection interface. |
33805
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parents:
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diff
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|
465 |
37320
39f7d4ee8bcd
repository: port peer interfaces to zope.interface
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parents:
37006
diff
changeset
|
466 # Begin of ipeercommands interface. |
33805
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parents:
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467 |
f913e90f15a0
httppeer: use peer interface
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parents:
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diff
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|
468 def capabilities(self): |
33705
73fd395ee29e
httppeer: make several instance attributes internal (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33704
diff
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|
469 return self._caps |
2442
c660691fb45d
http: query server for capabilities
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2439
diff
changeset
|
470 |
37320
39f7d4ee8bcd
repository: port peer interfaces to zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37006
diff
changeset
|
471 # End of ipeercommands interface. |
33805
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httppeer: use peer interface
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parents:
33705
diff
changeset
|
472 |
30464
e16e234b9ca3
httppeer: do decompression inside _callstream
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30241
diff
changeset
|
473 def _callstream(self, cmd, _compressible=False, **args): |
35359
98bc4c43f570
py3: handle keyword arguments correctly in httppeer.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
35197
diff
changeset
|
474 args = pycompat.byteskwargs(args) |
36218
e4ccd7a69f77
httppeer: change logic around argument handling
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35884
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changeset
|
475 |
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476 req, cu, qs = makev1commandrequest( |
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|
477 self.ui, |
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|
478 self._requestbuilder, |
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479 self._caps, |
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480 self.capable, |
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481 self._url, |
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482 cmd, |
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483 args, |
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|
484 ) |
30763
a520aefb96f1
httppeer: advertise and support application/mercurial-0.2
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30759
diff
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|
485 |
37550
b5862ee01abe
httppeer: move error handling and response wrapping into sendrequest
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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|
486 resp = sendrequest(self.ui, self._urlopener, req) |
32002
bf855efe5664
httppeer: wrap HTTPResponse.read() globally
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parents:
30924
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487 |
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488 self._url, ct, resp = parsev1commandresponse( |
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489 self.ui, self._url, cu, qs, resp, _compressible |
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|
490 ) |
30464
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parents:
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491 |
752 | 492 return resp |
60 | 493 |
11589
e8d22fe2ddab
protocol: clean up call-like functions in http and ssh clients
Matt Mackall <mpm@selenic.com>
parents:
11588
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494 def _call(self, cmd, **args): |
e8d22fe2ddab
protocol: clean up call-like functions in http and ssh clients
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parents:
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changeset
|
495 fp = self._callstream(cmd, **args) |
2435
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496 try: |
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parents:
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|
497 return fp.read() |
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|
498 finally: |
ff2bac730b99
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parents:
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|
499 # if using keepalive, allow connection to be reused |
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parents:
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|
500 fp.close() |
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parents:
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changeset
|
501 |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
502 def _callpush(self, cmd, cg, **args): |
2465
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push over http: client support.
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parents:
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|
503 # have to stream bundle to a temp file because we do not have |
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504 # http 1.1 chunked transfer. |
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|
505 |
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parents:
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diff
changeset
|
506 types = self.capable(b'unbundle') |
3703
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fix push over HTTP to older servers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
3662
diff
changeset
|
507 try: |
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parents:
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|
508 types = types.split(b',') |
3703
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fix push over HTTP to older servers
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
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diff
changeset
|
509 except AttributeError: |
14060
aaa9a5989405
bundle: more comments about the different header types, remove useless if
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
13819
diff
changeset
|
510 # servers older than d1b16a746db6 will send 'unbundle' as a |
aaa9a5989405
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parents:
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|
511 # boolean capability. They only support headerless/uncompressed |
aaa9a5989405
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|
512 # bundles. |
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|
513 types = [b""] |
14060
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parents:
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changeset
|
514 for x in types: |
28666
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bundle: move writebundle() from changegroup.py to bundle2.py (API)
Martin von Zweigbergk <martinvonz@google.com>
parents:
28530
diff
changeset
|
515 if x in bundle2.bundletypes: |
14060
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parents:
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|
516 type = x |
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|
517 break |
3613
cbf352b9a3cd
Client support for hgweb unbundle with versions.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
3609
diff
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|
518 |
28666
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bundle: move writebundle() from changegroup.py to bundle2.py (API)
Martin von Zweigbergk <martinvonz@google.com>
parents:
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changeset
|
519 tempname = bundle2.writebundle(self.ui, cg, None, type) |
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|
520 fp = httpconnection.httpsendfile(self.ui, tempname, b"rb") |
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parents:
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diff
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|
521 headers = {'Content-Type': 'application/mercurial-0.1'} |
11592
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Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
522 |
2465
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parents:
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changeset
|
523 try: |
25085
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parents:
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diff
changeset
|
524 r = self._call(cmd, data=fp, headers=headers, **args) |
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|
525 vals = r.split(b'\n', 1) |
25085
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parents:
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diff
changeset
|
526 if len(vals) < 2: |
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|
527 raise error.ResponseError(_(b"unexpected response:"), r) |
25085
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parents:
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diff
changeset
|
528 return vals |
36430
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
changeset
|
529 except urlerr.httperror: |
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
changeset
|
530 # Catch and re-raise these so we don't try and treat them |
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
changeset
|
531 # like generic socket errors. They lack any values in |
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
changeset
|
532 # .args on Python 3 which breaks our socket.error block. |
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
changeset
|
533 raise |
25660
328739ea70c3
global: mass rewrite to use modern exception syntax
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25500
diff
changeset
|
534 except socket.error as err: |
25085
e05734cd7902
httppeer: use try/except/finally
Matt Mackall <mpm@selenic.com>
parents:
23895
diff
changeset
|
535 if err.args[0] in (errno.ECONNRESET, errno.EPIPE): |
43077
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Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
536 raise error.Abort(_(b'push failed: %s') % err.args[1]) |
26587
56b2bcea2529
error: get Abort from 'error' instead of 'util'
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
25954
diff
changeset
|
537 raise error.Abort(err.args[1]) |
2465
c91118f425d0
push over http: client support.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2447
diff
changeset
|
538 finally: |
c91118f425d0
push over http: client support.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2447
diff
changeset
|
539 fp.close() |
c91118f425d0
push over http: client support.
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parents:
2447
diff
changeset
|
540 os.unlink(tempname) |
2439
e8c4f3d3df8c
extend network protocol to stop clients from locking servers
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2435
diff
changeset
|
541 |
21074
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
542 def _calltwowaystream(self, cmd, fp, **args): |
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
543 filename = None |
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
544 try: |
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
545 # dump bundle to disk |
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parents:
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diff
changeset
|
546 fd, filename = pycompat.mkstemp(prefix=b"hg-bundle-", suffix=b".hg") |
43503
313e3a279828
cleanup: remove pointless r-prefixes on double-quoted strings
Augie Fackler <augie@google.com>
parents:
43117
diff
changeset
|
547 with os.fdopen(fd, "wb") as fh: |
21074
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
548 d = fp.read(4096) |
42852
58f73e9ccfff
httppeer: use context manager when writing temporary bundle to send
Martin von Zweigbergk <martinvonz@google.com>
parents:
42814
diff
changeset
|
549 while d: |
58f73e9ccfff
httppeer: use context manager when writing temporary bundle to send
Martin von Zweigbergk <martinvonz@google.com>
parents:
42814
diff
changeset
|
550 fh.write(d) |
58f73e9ccfff
httppeer: use context manager when writing temporary bundle to send
Martin von Zweigbergk <martinvonz@google.com>
parents:
42814
diff
changeset
|
551 d = fp.read(4096) |
21074
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parents:
20905
diff
changeset
|
552 # start http push |
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diff
changeset
|
553 with httpconnection.httpsendfile(self.ui, filename, b"rb") as fp_: |
43506
9f70512ae2cf
cleanup: remove pointless r-prefixes on single-quoted strings
Augie Fackler <augie@google.com>
parents:
43503
diff
changeset
|
554 headers = {'Content-Type': 'application/mercurial-0.1'} |
42853
37debb6771f5
httppeer: use context manager when reading temporary bundle to send
Martin von Zweigbergk <martinvonz@google.com>
parents:
42852
diff
changeset
|
555 return self._callstream(cmd, data=fp_, headers=headers, **args) |
21074
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
556 finally: |
42852
58f73e9ccfff
httppeer: use context manager when writing temporary bundle to send
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parents:
42814
diff
changeset
|
557 if filename is not None: |
21074
f8a0d82b0463
httppeer: support for _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
558 os.unlink(filename) |
f8a0d82b0463
httppeer: support for _calltwowaystream
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parents:
20905
diff
changeset
|
559 |
20905
167047ba3cfa
wireproto: drop the _decompress method in favor a new call type
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
18742
diff
changeset
|
560 def _callcompressable(self, cmd, **args): |
30464
e16e234b9ca3
httppeer: do decompression inside _callstream
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30241
diff
changeset
|
561 return self._callstream(cmd, _compressible=True, **args) |
11370 | 562 |
21188
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httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa
Mads Kiilerich <madski@unity3d.com>
parents:
21074
diff
changeset
|
563 def _abort(self, exception): |
d36440d84328
httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa
Mads Kiilerich <madski@unity3d.com>
parents:
21074
diff
changeset
|
564 raise exception |
d36440d84328
httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa
Mads Kiilerich <madski@unity3d.com>
parents:
21074
diff
changeset
|
565 |
43076
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parents:
42853
diff
changeset
|
566 |
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diff
changeset
|
567 def sendv2request( |
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parents:
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diff
changeset
|
568 ui, opener, requestbuilder, apiurl, permission, requests, redirect |
2372284d9457
formatting: blacken the codebase
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parents:
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diff
changeset
|
569 ): |
40133
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
570 wireprotoframing.populatestreamencoders() |
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
571 |
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
572 uiencoders = ui.configlist(b'experimental', b'httppeer.v2-encoder-order') |
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
573 |
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
574 if uiencoders: |
762ef19a07e3
wireprotov2: send protocol settings frame from client
Gregory Szorc <gregory.szorc@gmail.com>
parents:
40129
diff
changeset
|
575 encoders = [] |
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576 |
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577 for encoder in uiencoders: |
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578 if encoder not in wireprotoframing.STREAM_ENCODERS: |
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579 ui.warn( |
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580 _( |
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581 b'wire protocol version 2 encoder referenced in ' |
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582 b'config (%s) is not known; ignoring\n' |
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583 ) |
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584 % encoder |
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585 ) |
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586 else: |
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587 encoders.append(encoder) |
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588 |
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589 else: |
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590 encoders = wireprotoframing.STREAM_ENCODERS_ORDER |
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591 |
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592 reactor = wireprotoframing.clientreactor( |
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593 ui, |
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594 hasmultiplesend=False, |
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595 buffersends=True, |
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596 clientcontentencoders=encoders, |
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597 ) |
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598 |
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599 handler = wireprotov2peer.clienthandler( |
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600 ui, reactor, opener=opener, requestbuilder=requestbuilder |
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601 ) |
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602 |
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603 url = b'%s/%s' % (apiurl, permission) |
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604 |
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605 if len(requests) > 1: |
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606 url += b'/multirequest' |
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607 else: |
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608 url += b'/%s' % requests[0][0] |
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609 |
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610 ui.debug(b'sending %d commands\n' % len(requests)) |
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611 for command, args, f in requests: |
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612 ui.debug( |
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613 b'sending command %s: %s\n' |
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614 % (command, stringutil.pprint(args, indent=2)) |
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615 ) |
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616 assert not list( |
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617 handler.callcommand(command, args, f, redirect=redirect) |
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618 ) |
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619 |
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620 # TODO stream this. |
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621 body = b''.join(map(bytes, handler.flushcommands())) |
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622 |
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623 # TODO modify user-agent to reflect v2 |
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624 headers = { |
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625 'Accept': wireprotov2server.FRAMINGTYPE, |
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626 'Content-Type': wireprotov2server.FRAMINGTYPE, |
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627 } |
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628 |
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629 req = requestbuilder(pycompat.strurl(url), body, headers) |
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630 req.add_unredirected_header('Content-Length', '%d' % len(body)) |
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631 |
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632 try: |
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633 res = opener.open(req) |
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634 except urlerr.httperror as e: |
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635 if e.code == 401: |
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636 raise error.Abort(_(b'authorization failed')) |
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637 |
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638 raise |
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639 except httplib.HTTPException as e: |
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640 ui.traceback() |
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641 raise IOError(None, e) |
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642 |
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643 return handler, res |
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644 |
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645 |
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646 class queuedcommandfuture(pycompat.futures.Future): |
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647 """Wraps result() on command futures to trigger submission on call.""" |
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648 |
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649 def result(self, timeout=None): |
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650 if self.done(): |
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651 return pycompat.futures.Future.result(self, timeout) |
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652 |
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653 self._peerexecutor.sendcommands() |
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654 |
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655 # sendcommands() will restore the original __class__ and self.result |
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656 # will resolve to Future.result. |
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657 return self.result(timeout) |
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658 |
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659 |
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660 @interfaceutil.implementer(repository.ipeercommandexecutor) |
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661 class httpv2executor(object): |
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662 def __init__( |
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663 self, ui, opener, requestbuilder, apiurl, descriptor, redirect |
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664 ): |
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665 self._ui = ui |
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666 self._opener = opener |
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667 self._requestbuilder = requestbuilder |
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668 self._apiurl = apiurl |
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669 self._descriptor = descriptor |
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670 self._redirect = redirect |
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671 self._sent = False |
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672 self._closed = False |
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673 self._neededpermissions = set() |
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674 self._calls = [] |
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675 self._futures = weakref.WeakSet() |
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676 self._responseexecutor = None |
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677 self._responsef = None |
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678 |
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679 def __enter__(self): |
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680 return self |
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681 |
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682 def __exit__(self, exctype, excvalue, exctb): |
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683 self.close() |
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684 |
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685 def callcommand(self, command, args): |
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686 if self._sent: |
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687 raise error.ProgrammingError( |
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688 b'callcommand() cannot be used after commands are sent' |
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689 ) |
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690 |
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691 if self._closed: |
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692 raise error.ProgrammingError( |
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693 b'callcommand() cannot be used after close()' |
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694 ) |
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695 |
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696 # The service advertises which commands are available. So if we attempt |
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697 # to call an unknown command or pass an unknown argument, we can screen |
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698 # for this. |
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699 if command not in self._descriptor[b'commands']: |
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700 raise error.ProgrammingError( |
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701 b'wire protocol command %s is not available' % command |
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702 ) |
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703 |
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704 cmdinfo = self._descriptor[b'commands'][command] |
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705 unknownargs = set(args.keys()) - set(cmdinfo.get(b'args', {})) |
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706 |
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707 if unknownargs: |
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708 raise error.ProgrammingError( |
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709 b'wire protocol command %s does not accept argument: %s' |
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710 % (command, b', '.join(sorted(unknownargs))) |
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711 ) |
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712 |
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713 self._neededpermissions |= set(cmdinfo[b'permissions']) |
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714 |
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715 # TODO we /could/ also validate types here, since the API descriptor |
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716 # includes types... |
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717 |
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718 f = pycompat.futures.Future() |
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719 |
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720 # Monkeypatch it so result() triggers sendcommands(), otherwise result() |
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721 # could deadlock. |
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722 f.__class__ = queuedcommandfuture |
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723 f._peerexecutor = self |
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724 |
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725 self._futures.add(f) |
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726 self._calls.append((command, args, f)) |
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727 |
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728 return f |
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729 |
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730 def sendcommands(self): |
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731 if self._sent: |
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732 return |
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733 |
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734 if not self._calls: |
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735 return |
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736 |
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737 self._sent = True |
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738 |
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739 # Unhack any future types so caller sees a clean type and so we |
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740 # break reference cycle. |
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741 for f in self._futures: |
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742 if isinstance(f, queuedcommandfuture): |
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743 f.__class__ = pycompat.futures.Future |
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744 f._peerexecutor = None |
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745 |
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746 # Mark the future as running and filter out cancelled futures. |
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747 calls = [ |
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748 (command, args, f) |
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749 for command, args, f in self._calls |
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750 if f.set_running_or_notify_cancel() |
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751 ] |
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752 |
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753 # Clear out references, prevent improper object usage. |
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754 self._calls = None |
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755 |
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756 if not calls: |
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757 return |
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758 |
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759 permissions = set(self._neededpermissions) |
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760 |
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761 if b'push' in permissions and b'pull' in permissions: |
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762 permissions.remove(b'pull') |
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763 |
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764 if len(permissions) > 1: |
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765 raise error.RepoError( |
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766 _(b'cannot make request requiring multiple permissions: %s') |
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767 % _(b', ').join(sorted(permissions)) |
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768 ) |
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769 |
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|
770 permission = { |
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771 b'push': b'rw', |
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772 b'pull': b'ro', |
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773 }[permissions.pop()] |
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774 |
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775 handler, resp = sendv2request( |
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776 self._ui, |
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777 self._opener, |
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778 self._requestbuilder, |
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779 self._apiurl, |
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780 permission, |
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781 calls, |
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782 self._redirect, |
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783 ) |
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784 |
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785 # TODO we probably want to validate the HTTP code, media type, etc. |
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786 |
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787 self._responseexecutor = pycompat.futures.ThreadPoolExecutor(1) |
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788 self._responsef = self._responseexecutor.submit( |
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789 self._handleresponse, handler, resp |
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790 ) |
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791 |
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792 def close(self): |
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793 if self._closed: |
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794 return |
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795 |
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796 self.sendcommands() |
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797 |
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798 self._closed = True |
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799 |
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800 if not self._responsef: |
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801 return |
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802 |
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803 # TODO ^C here may not result in immediate program termination. |
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804 |
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805 try: |
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806 self._responsef.result() |
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807 finally: |
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808 self._responseexecutor.shutdown(wait=True) |
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809 self._responsef = None |
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810 self._responseexecutor = None |
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811 |
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812 # If any of our futures are still in progress, mark them as |
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813 # errored, otherwise a result() could wait indefinitely. |
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814 for f in self._futures: |
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815 if not f.done(): |
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816 f.set_exception( |
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817 error.ResponseError(_(b'unfulfilled command response')) |
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818 ) |
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819 |
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820 self._futures = None |
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821 |
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822 def _handleresponse(self, handler, resp): |
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823 # Called in a thread to read the response. |
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824 |
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|
825 while handler.readdata(resp): |
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|
826 pass |
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827 |
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828 |
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|
829 @interfaceutil.implementer(repository.ipeerv2) |
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|
830 class httpv2peer(object): |
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831 |
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|
832 limitedarguments = False |
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833 |
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834 def __init__( |
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835 self, ui, repourl, apipath, opener, requestbuilder, apidescriptor |
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836 ): |
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837 self.ui = ui |
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838 self.apidescriptor = apidescriptor |
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839 |
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840 if repourl.endswith(b'/'): |
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841 repourl = repourl[:-1] |
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842 |
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843 self._url = repourl |
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844 self._apipath = apipath |
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845 self._apiurl = b'%s/%s' % (repourl, apipath) |
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846 self._opener = opener |
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847 self._requestbuilder = requestbuilder |
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|
848 |
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|
849 self._redirect = wireprotov2peer.supportedredirects(ui, apidescriptor) |
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850 |
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851 # Start of ipeerconnection. |
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852 |
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853 def url(self): |
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854 return self._url |
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855 |
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856 def local(self): |
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|
857 return None |
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858 |
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|
859 def peer(self): |
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|
860 return self |
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|
861 |
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862 def canpush(self): |
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|
863 # TODO change once implemented. |
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|
864 return False |
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|
865 |
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866 def close(self): |
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|
867 self.ui.note( |
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868 _( |
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869 b'(sent %d HTTP requests and %d bytes; ' |
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870 b'received %d bytes in responses)\n' |
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871 ) |
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872 % ( |
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873 self._opener.requestscount, |
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874 self._opener.sentbytescount, |
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875 self._opener.receivedbytescount, |
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|
876 ) |
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|
877 ) |
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|
878 |
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|
879 # End of ipeerconnection. |
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|
880 |
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881 # Start of ipeercapabilities. |
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882 |
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883 def capable(self, name): |
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884 # The capabilities used internally historically map to capabilities |
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885 # advertised from the "capabilities" wire protocol command. However, |
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886 # version 2 of that command works differently. |
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|
887 |
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888 # Maps to commands that are available. |
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|
889 if name in ( |
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|
890 b'branchmap', |
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891 b'getbundle', |
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892 b'known', |
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893 b'lookup', |
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|
894 b'pushkey', |
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|
895 ): |
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|
896 return True |
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|
897 |
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diff
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|
898 # Other concepts. |
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diff
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|
899 if name in (b'bundle2',): |
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|
900 return True |
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|
901 |
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|
902 # Alias command-* to presence of command of that name. |
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903 if name.startswith(b'command-'): |
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904 return name[len(b'command-') :] in self.apidescriptor[b'commands'] |
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|
905 |
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|
906 return False |
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|
907 |
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|
908 def requirecap(self, name, purpose): |
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|
909 if self.capable(name): |
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|
910 return |
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|
911 |
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|
912 raise error.CapabilityError( |
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913 _( |
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914 b'cannot %s; client or remote repository does not support the ' |
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|
915 b'\'%s\' capability' |
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|
916 ) |
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|
917 % (purpose, name) |
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918 ) |
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919 |
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920 # End of ipeercapabilities. |
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|
921 |
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|
922 def _call(self, name, **args): |
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|
923 with self.commandexecutor() as e: |
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924 return e.callcommand(name, args).result() |
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925 |
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|
926 def commandexecutor(self): |
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|
927 return httpv2executor( |
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|
928 self.ui, |
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|
929 self._opener, |
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|
930 self._requestbuilder, |
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|
931 self._apiurl, |
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|
932 self.apidescriptor, |
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|
933 self._redirect, |
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934 ) |
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935 |
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936 |
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937 # Registry of API service names to metadata about peers that handle it. |
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938 # |
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939 # The following keys are meaningful: |
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940 # |
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|
941 # init |
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|
942 # Callable receiving (ui, repourl, servicepath, opener, requestbuilder, |
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|
943 # apidescriptor) to create a peer. |
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|
944 # |
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945 # priority |
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946 # Integer priority for the service. If we could choose from multiple |
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947 # services, we choose the one with the highest priority. |
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948 API_PEERS = { |
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949 wireprototypes.HTTP_WIREPROTO_V2: { |
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950 b'init': httpv2peer, |
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951 b'priority': 50, |
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952 }, |
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953 } |
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954 |
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955 |
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956 def performhandshake(ui, url, opener, requestbuilder): |
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957 # The handshake is a request to the capabilities command. |
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958 |
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959 caps = None |
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960 |
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961 def capable(x): |
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962 raise error.ProgrammingError(b'should not be called') |
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963 |
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964 args = {} |
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965 |
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966 # The client advertises support for newer protocols by adding an |
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967 # X-HgUpgrade-* header with a list of supported APIs and an |
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968 # X-HgProto-* header advertising which serializing formats it supports. |
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969 # We only support the HTTP version 2 transport and CBOR responses for |
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970 # now. |
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971 advertisev2 = ui.configbool(b'experimental', b'httppeer.advertise-v2') |
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972 |
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973 if advertisev2: |
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974 args[b'headers'] = { |
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975 'X-HgProto-1': 'cbor', |
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976 } |
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977 |
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978 args[b'headers'].update( |
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979 encodevalueinheaders( |
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980 b' '.join(sorted(API_PEERS)), |
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981 b'X-HgUpgrade', |
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982 # We don't know the header limit this early. |
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983 # So make it small. |
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984 1024, |
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985 ) |
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986 ) |
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987 |
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988 req, requrl, qs = makev1commandrequest( |
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989 ui, requestbuilder, caps, capable, url, b'capabilities', args |
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990 ) |
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991 resp = sendrequest(ui, opener, req) |
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992 |
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993 # The server may redirect us to the repo root, stripping the |
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994 # ?cmd=capabilities query string from the URL. The server would likely |
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995 # return HTML in this case and ``parsev1commandresponse()`` would raise. |
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996 # We catch this special case and re-issue the capabilities request against |
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997 # the new URL. |
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998 # |
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999 # We should ideally not do this, as a redirect that drops the query |
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1000 # string from the URL is arguably a server bug. (Garbage in, garbage out). |
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1001 # However, Mercurial clients for several years appeared to handle this |
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1002 # issue without behavior degradation. And according to issue 5860, it may |
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1003 # be a longstanding bug in some server implementations. So we allow a |
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1004 # redirect that drops the query string to "just work." |
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1005 try: |
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1006 respurl, ct, resp = parsev1commandresponse( |
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1007 ui, url, requrl, qs, resp, compressible=False, allowcbor=advertisev2 |
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1008 ) |
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1009 except RedirectedRepoError as e: |
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1010 req, requrl, qs = makev1commandrequest( |
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1011 ui, requestbuilder, caps, capable, e.respurl, b'capabilities', args |
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1012 ) |
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1013 resp = sendrequest(ui, opener, req) |
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1014 respurl, ct, resp = parsev1commandresponse( |
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1015 ui, url, requrl, qs, resp, compressible=False, allowcbor=advertisev2 |
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1016 ) |
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1017 |
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1018 try: |
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1019 rawdata = resp.read() |
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1020 finally: |
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1021 resp.close() |
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1022 |
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1023 if not ct.startswith(b'application/mercurial-'): |
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1024 raise error.ProgrammingError(b'unexpected content-type: %s' % ct) |
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1025 |
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1026 if advertisev2: |
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1027 if ct == b'application/mercurial-cbor': |
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1028 try: |
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1029 info = cborutil.decodeall(rawdata)[0] |
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1030 except cborutil.CBORDecodeError: |
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1031 raise error.Abort( |
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1032 _(b'error decoding CBOR from remote server'), |
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1033 hint=_( |
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1034 b'try again and consider contacting ' |
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1035 b'the server operator' |
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1036 ), |
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1037 ) |
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1038 |
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1039 # We got a legacy response. That's fine. |
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1040 elif ct in (b'application/mercurial-0.1', b'application/mercurial-0.2'): |
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1041 info = {b'v1capabilities': set(rawdata.split())} |
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1042 |
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1043 else: |
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1044 raise error.RepoError( |
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1045 _(b'unexpected response type from server: %s') % ct |
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1046 ) |
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1047 else: |
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1048 info = {b'v1capabilities': set(rawdata.split())} |
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1049 |
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1050 return respurl, info |
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1051 |
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1052 |
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1053 def makepeer(ui, path, opener=None, requestbuilder=urlreq.request): |
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1054 """Construct an appropriate HTTP peer instance. |
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1055 |
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1056 ``opener`` is an ``url.opener`` that should be used to establish |
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1057 connections, perform HTTP requests. |
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1058 |
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1059 ``requestbuilder`` is the type used for constructing HTTP requests. |
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1060 It exists as an argument so extensions can override the default. |
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1061 """ |
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1062 u = urlutil.url(path) |
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1063 if u.query or u.fragment: |
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1064 raise error.Abort( |
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1065 _(b'unsupported URL component: "%s"') % (u.query or u.fragment) |
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1066 ) |
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1067 |
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1068 # urllib cannot handle URLs with embedded user or passwd. |
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1069 url, authinfo = u.authinfo() |
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1070 ui.debug(b'using %s\n' % url) |
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1071 |
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1072 opener = opener or urlmod.opener(ui, authinfo) |
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1073 |
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1074 respurl, info = performhandshake(ui, url, opener, requestbuilder) |
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1075 |
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1076 # Given the intersection of APIs that both we and the server support, |
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1077 # sort by their advertised priority and pick the first one. |
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1078 # |
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1079 # TODO consider making this request-based and interface driven. For |
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1080 # example, the caller could say "I want a peer that does X." It's quite |
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1081 # possible that not all peers would do that. Since we know the service |
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1082 # capabilities, we could filter out services not meeting the |
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1083 # requirements. Possibly by consulting the interfaces defined by the |
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1084 # peer type. |
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1085 apipeerchoices = set(info.get(b'apis', {}).keys()) & set(API_PEERS.keys()) |
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1086 |
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1087 preferredchoices = sorted( |
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1088 apipeerchoices, key=lambda x: API_PEERS[x][b'priority'], reverse=True |
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1089 ) |
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1090 |
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1091 for service in preferredchoices: |
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1092 apipath = b'%s/%s' % (info[b'apibase'].rstrip(b'/'), service) |
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1093 |
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1094 return API_PEERS[service][b'init']( |
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1095 ui, respurl, apipath, opener, requestbuilder, info[b'apis'][service] |
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1096 ) |
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1097 |
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1098 # Failed to construct an API peer. Fall back to legacy. |
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1099 return httppeer( |
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1100 ui, path, respurl, opener, requestbuilder, info[b'v1capabilities'] |
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1101 ) |
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1102 |
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1103 |
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1104 def instance(ui, path, create, intents=None, createopts=None): |
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1105 if create: |
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1106 raise error.Abort(_(b'cannot create new http repository')) |
7211 | 1107 try: |
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1108 if path.startswith(b'https:') and not urlmod.has_https: |
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1109 raise error.Abort( |
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1110 _(b'Python support for SSL and HTTPS is not installed') |
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1111 ) |
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1112 |
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1113 inst = makepeer(ui, path) |
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1114 |
7211 | 1115 return inst |
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1116 except error.RepoError as httpexception: |
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1117 try: |
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1118 r = statichttprepo.instance(ui, b"static-" + path, create) |
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1119 ui.note(_(b'(falling back to static-http)\n')) |
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1120 return r |
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1121 except error.RepoError: |
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1122 raise httpexception # use the original http RepoError instead |