Mercurial > hg
annotate mercurial/httppeer.py @ 39857:8dab7c8a93eb
upgrade: report size of backing files, not internal storage size
upgrade.py is the only consumer of filelog.index, which I'd like
to eliminate from the file storage interface.
This commit changes the upgrade code to report the storage size
of files by looking at the size of the files backing its storage
instead of looking at the index.
I'm not convinced the approach in this patch will live very long
because it is relying on low-level attributes like "opener" and
"files," which may behave very differently on non-revlog storage.
But the data is only used for reporting purposes and it does get
us one step closer to eliminating "index."
A side-effect of this change is we now report the size of the revlog
index data - not just the revision data. I think this is more
accurate.
Differential Revision: https://phab.mercurial-scm.org/D4717
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 24 Sep 2018 09:37:19 -0700 |
parents | 9c2c77c73f23 |
children | f80db6adabbe |
rev | line source |
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1 # httppeer.py - HTTP repository proxy classes for mercurial |
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2 # |
2859 | 3 # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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 . import ( |
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20 bundle2, |
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21 error, |
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22 httpconnection, |
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23 pycompat, |
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24 repository, |
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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 .utils import ( |
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35 cborutil, |
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36 interfaceutil, |
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37 stringutil, |
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38 ) |
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39 |
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40 httplib = util.httplib |
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41 urlerr = util.urlerr |
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42 urlreq = util.urlreq |
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43 |
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44 def encodevalueinheaders(value, header, limit): |
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45 """Encode a string value into multiple HTTP headers. |
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46 |
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47 ``value`` will be encoded into 1 or more HTTP headers with the names |
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48 ``header-<N>`` where ``<N>`` is an integer starting at 1. Each header |
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49 name + value will be at most ``limit`` bytes long. |
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50 |
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51 Returns an iterable of 2-tuples consisting of header names and |
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52 values as native strings. |
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53 """ |
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54 # HTTP Headers are ASCII. Python 3 requires them to be unicodes, |
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55 # not bytes. This function always takes bytes in as arguments. |
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56 fmt = pycompat.strurl(header) + r'-%s' |
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57 # Note: it is *NOT* a bug that the last bit here is a bytestring |
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58 # and not a unicode: we're just getting the encoded length anyway, |
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59 # and using an r-string to make it portable between Python 2 and 3 |
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60 # doesn't work because then the \r is a literal backslash-r |
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61 # instead of a carriage return. |
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62 valuelen = limit - len(fmt % r'000') - len(': \r\n') |
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63 result = [] |
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64 |
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65 n = 0 |
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66 for i in pycompat.xrange(0, len(value), valuelen): |
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67 n += 1 |
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68 result.append((fmt % str(n), pycompat.strurl(value[i:i + valuelen]))) |
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69 |
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70 return result |
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71 |
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72 def _wraphttpresponse(resp): |
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73 """Wrap an HTTPResponse with common error handlers. |
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74 |
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75 This ensures that any I/O from any consumer raises the appropriate |
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76 error and messaging. |
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77 """ |
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78 origread = resp.read |
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79 |
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80 class readerproxy(resp.__class__): |
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81 def read(self, size=None): |
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82 try: |
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83 return origread(size) |
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84 except httplib.IncompleteRead as e: |
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85 # e.expected is an integer if length known or None otherwise. |
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86 if e.expected: |
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87 got = len(e.partial) |
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88 total = e.expected + got |
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89 msg = _('HTTP request error (incomplete response; ' |
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90 'expected %d bytes got %d)') % (total, got) |
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91 else: |
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92 msg = _('HTTP request error (incomplete response)') |
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93 |
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94 raise error.PeerTransportError( |
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95 msg, |
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96 hint=_('this may be an intermittent network failure; ' |
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97 'if the error persists, consider contacting the ' |
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98 'network or server operator')) |
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99 except httplib.HTTPException as e: |
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100 raise error.PeerTransportError( |
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101 _('HTTP request error (%s)') % e, |
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102 hint=_('this may be an intermittent network failure; ' |
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103 'if the error persists, consider contacting the ' |
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104 'network or server operator')) |
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105 |
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106 resp.__class__ = readerproxy |
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107 |
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108 class _multifile(object): |
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109 def __init__(self, *fileobjs): |
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110 for f in fileobjs: |
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111 if not util.safehasattr(f, 'length'): |
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112 raise ValueError( |
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113 '_multifile only supports file objects that ' |
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114 'have a length but this one does not:', type(f), f) |
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115 self._fileobjs = fileobjs |
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116 self._index = 0 |
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117 |
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118 @property |
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119 def length(self): |
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120 return sum(f.length for f in self._fileobjs) |
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121 |
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122 def read(self, amt=None): |
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123 if amt <= 0: |
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124 return ''.join(f.read() for f in self._fileobjs) |
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125 parts = [] |
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126 while amt and self._index < len(self._fileobjs): |
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127 parts.append(self._fileobjs[self._index].read(amt)) |
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128 got = len(parts[-1]) |
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129 if got < amt: |
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130 self._index += 1 |
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131 amt -= got |
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132 return ''.join(parts) |
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133 |
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134 def seek(self, offset, whence=os.SEEK_SET): |
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135 if whence != os.SEEK_SET: |
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136 raise NotImplementedError( |
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137 '_multifile does not support anything other' |
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138 ' than os.SEEK_SET for whence on seek()') |
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139 if offset != 0: |
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140 raise NotImplementedError( |
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141 '_multifile only supports seeking to start, but that ' |
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142 'could be fixed if you need it') |
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143 for f in self._fileobjs: |
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144 f.seek(0) |
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145 self._index = 0 |
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146 |
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147 def makev1commandrequest(ui, requestbuilder, caps, capablefn, |
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148 repobaseurl, cmd, args): |
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149 """Make an HTTP request to run a command for a version 1 client. |
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150 |
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151 ``caps`` is a set of known server capabilities. The value may be |
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152 None if capabilities are not yet known. |
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153 |
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154 ``capablefn`` is a function to evaluate a capability. |
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155 |
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156 ``cmd``, ``args``, and ``data`` define the command, its arguments, and |
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157 raw data to pass to it. |
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158 """ |
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159 if cmd == 'pushkey': |
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160 args['data'] = '' |
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161 data = args.pop('data', None) |
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162 headers = args.pop('headers', {}) |
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163 |
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164 ui.debug("sending %s command\n" % cmd) |
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165 q = [('cmd', cmd)] |
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166 headersize = 0 |
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167 # Important: don't use self.capable() here or else you end up |
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168 # with infinite recursion when trying to look up capabilities |
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169 # for the first time. |
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170 postargsok = caps is not None and 'httppostargs' in caps |
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171 |
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172 # Send arguments via POST. |
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173 if postargsok and args: |
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174 strargs = urlreq.urlencode(sorted(args.items())) |
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175 if not data: |
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176 data = strargs |
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177 else: |
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178 if isinstance(data, bytes): |
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179 i = io.BytesIO(data) |
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180 i.length = len(data) |
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181 data = i |
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182 argsio = io.BytesIO(strargs) |
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183 argsio.length = len(strargs) |
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184 data = _multifile(argsio, data) |
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185 headers[r'X-HgArgs-Post'] = len(strargs) |
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186 elif args: |
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187 # Calling self.capable() can infinite loop if we are calling |
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188 # "capabilities". But that command should never accept wire |
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189 # protocol arguments. So this should never happen. |
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190 assert cmd != 'capabilities' |
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191 httpheader = capablefn('httpheader') |
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192 if httpheader: |
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193 headersize = int(httpheader.split(',', 1)[0]) |
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194 |
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195 # Send arguments via HTTP headers. |
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196 if headersize > 0: |
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197 # The headers can typically carry more data than the URL. |
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198 encargs = urlreq.urlencode(sorted(args.items())) |
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199 for header, value in encodevalueinheaders(encargs, 'X-HgArg', |
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200 headersize): |
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201 headers[header] = value |
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202 # Send arguments via query string (Mercurial <1.9). |
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203 else: |
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204 q += sorted(args.items()) |
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205 |
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206 qs = '?%s' % urlreq.urlencode(q) |
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207 cu = "%s%s" % (repobaseurl, qs) |
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208 size = 0 |
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209 if util.safehasattr(data, 'length'): |
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210 size = data.length |
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211 elif data is not None: |
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212 size = len(data) |
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213 if data is not None and r'Content-Type' not in headers: |
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214 headers[r'Content-Type'] = r'application/mercurial-0.1' |
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215 |
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216 # Tell the server we accept application/mercurial-0.2 and multiple |
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217 # compression formats if the server is capable of emitting those |
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218 # payloads. |
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219 # Note: Keep this set empty by default, as client advertisement of |
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220 # protocol parameters should only occur after the handshake. |
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221 protoparams = set() |
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222 |
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223 mediatypes = set() |
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224 if caps is not None: |
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225 mt = capablefn('httpmediatype') |
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226 if mt: |
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227 protoparams.add('0.1') |
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228 mediatypes = set(mt.split(',')) |
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229 |
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230 protoparams.add('partial-pull') |
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231 |
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232 if '0.2tx' in mediatypes: |
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233 protoparams.add('0.2') |
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234 |
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235 if '0.2tx' in mediatypes and capablefn('compression'): |
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236 # We /could/ compare supported compression formats and prune |
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237 # non-mutually supported or error if nothing is mutually supported. |
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238 # For now, send the full list to the server and have it error. |
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239 comps = [e.wireprotosupport().name for e in |
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240 util.compengines.supportedwireengines(util.CLIENTROLE)] |
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241 protoparams.add('comp=%s' % ','.join(comps)) |
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242 |
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243 if protoparams: |
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244 protoheaders = encodevalueinheaders(' '.join(sorted(protoparams)), |
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245 'X-HgProto', |
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246 headersize or 1024) |
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247 for header, value in protoheaders: |
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248 headers[header] = value |
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249 |
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250 varyheaders = [] |
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251 for header in headers: |
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252 if header.lower().startswith(r'x-hg'): |
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253 varyheaders.append(header) |
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254 |
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255 if varyheaders: |
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256 headers[r'Vary'] = r','.join(sorted(varyheaders)) |
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257 |
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258 req = requestbuilder(pycompat.strurl(cu), data, headers) |
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259 |
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260 if data is not None: |
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261 ui.debug("sending %d bytes\n" % size) |
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262 req.add_unredirected_header(r'Content-Length', r'%d' % size) |
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263 |
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264 return req, cu, qs |
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265 |
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266 def _reqdata(req): |
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267 """Get request data, if any. If no data, returns None.""" |
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268 if pycompat.ispy3: |
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269 return req.data |
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270 if not req.has_data(): |
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271 return None |
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272 return req.get_data() |
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273 |
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274 def sendrequest(ui, opener, req): |
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275 """Send a prepared HTTP request. |
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276 |
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277 Returns the response object. |
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278 """ |
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279 dbg = ui.debug |
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280 if (ui.debugflag |
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281 and ui.configbool('devel', 'debug.peer-request')): |
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282 line = 'devel-peer-request: %s\n' |
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283 dbg(line % '%s %s' % (pycompat.bytesurl(req.get_method()), |
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284 pycompat.bytesurl(req.get_full_url()))) |
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285 hgargssize = None |
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286 |
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287 for header, value in sorted(req.header_items()): |
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288 header = pycompat.bytesurl(header) |
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289 value = pycompat.bytesurl(value) |
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290 if header.startswith('X-hgarg-'): |
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291 if hgargssize is None: |
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292 hgargssize = 0 |
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293 hgargssize += len(value) |
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294 else: |
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295 dbg(line % ' %s %s' % (header, value)) |
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296 |
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297 if hgargssize is not None: |
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298 dbg(line % ' %d bytes of commands arguments in headers' |
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299 % hgargssize) |
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300 data = _reqdata(req) |
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301 if data is not None: |
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302 length = getattr(data, 'length', None) |
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303 if length is None: |
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304 length = len(data) |
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305 dbg(line % ' %d bytes of data' % length) |
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306 |
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307 start = util.timer() |
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308 |
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309 res = None |
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310 try: |
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311 res = opener.open(req) |
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312 except urlerr.httperror as inst: |
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313 if inst.code == 401: |
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314 raise error.Abort(_('authorization failed')) |
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315 raise |
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316 except httplib.HTTPException as inst: |
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317 ui.debug('http error requesting %s\n' % |
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318 util.hidepassword(req.get_full_url())) |
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319 ui.traceback() |
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320 raise IOError(None, inst) |
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321 finally: |
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322 if ui.debugflag and ui.configbool('devel', 'debug.peer-request'): |
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323 code = res.code if res else -1 |
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324 dbg(line % ' finished in %.4f seconds (%d)' |
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325 % (util.timer() - start, code)) |
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326 |
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327 # Insert error handlers for common I/O failures. |
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328 _wraphttpresponse(res) |
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329 |
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330 return res |
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331 |
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332 class RedirectedRepoError(error.RepoError): |
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333 def __init__(self, msg, respurl): |
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334 super(RedirectedRepoError, self).__init__(msg) |
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335 self.respurl = respurl |
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336 |
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337 def parsev1commandresponse(ui, baseurl, requrl, qs, resp, compressible, |
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338 allowcbor=False): |
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339 # record the url we got redirected to |
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340 redirected = False |
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341 respurl = pycompat.bytesurl(resp.geturl()) |
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342 if respurl.endswith(qs): |
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343 respurl = respurl[:-len(qs)] |
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344 qsdropped = False |
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345 else: |
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346 qsdropped = True |
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347 |
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348 if baseurl.rstrip('/') != respurl.rstrip('/'): |
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349 redirected = True |
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350 if not ui.quiet: |
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351 ui.warn(_('real URL is %s\n') % respurl) |
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352 |
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353 try: |
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354 proto = pycompat.bytesurl(resp.getheader(r'content-type', r'')) |
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355 except AttributeError: |
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356 proto = pycompat.bytesurl(resp.headers.get(r'content-type', r'')) |
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357 |
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358 safeurl = util.hidepassword(baseurl) |
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359 if proto.startswith('application/hg-error'): |
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360 raise error.OutOfBandError(resp.read()) |
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361 |
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362 # Pre 1.0 versions of Mercurial used text/plain and |
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363 # application/hg-changegroup. We don't support such old servers. |
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364 if not proto.startswith('application/mercurial-'): |
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365 ui.debug("requested URL: '%s'\n" % util.hidepassword(requrl)) |
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366 msg = _("'%s' does not appear to be an hg repository:\n" |
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367 "---%%<--- (%s)\n%s\n---%%<---\n") % ( |
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368 safeurl, proto or 'no content-type', resp.read(1024)) |
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369 |
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370 # Some servers may strip the query string from the redirect. We |
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371 # raise a special error type so callers can react to this specially. |
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372 if redirected and qsdropped: |
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373 raise RedirectedRepoError(msg, respurl) |
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374 else: |
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375 raise error.RepoError(msg) |
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376 |
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377 try: |
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378 subtype = proto.split('-', 1)[1] |
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379 |
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380 # Unless we end up supporting CBOR in the legacy wire protocol, |
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381 # this should ONLY be encountered for the initial capabilities |
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382 # request during handshake. |
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383 if subtype == 'cbor': |
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384 if allowcbor: |
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385 return respurl, proto, resp |
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386 else: |
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387 raise error.RepoError(_('unexpected CBOR response from ' |
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388 'server')) |
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389 |
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390 version_info = tuple([int(n) for n in subtype.split('.')]) |
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391 except ValueError: |
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392 raise error.RepoError(_("'%s' sent a broken Content-Type " |
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393 "header (%s)") % (safeurl, proto)) |
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394 |
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395 # TODO consider switching to a decompression reader that uses |
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396 # generators. |
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397 if version_info == (0, 1): |
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398 if compressible: |
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399 resp = util.compengines['zlib'].decompressorreader(resp) |
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400 |
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401 elif version_info == (0, 2): |
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402 # application/mercurial-0.2 always identifies the compression |
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403 # engine in the payload header. |
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Anton Shestakov <av6@dwimlabs.net>
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404 elen = struct.unpack('B', util.readexactly(resp, 1))[0] |
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405 ename = util.readexactly(resp, elen) |
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406 engine = util.compengines.forwiretype(ename) |
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407 |
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408 resp = engine.decompressorreader(resp) |
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409 else: |
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410 raise error.RepoError(_("'%s' uses newer protocol %s") % |
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411 (safeurl, subtype)) |
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412 |
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413 return respurl, proto, resp |
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414 |
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415 class httppeer(wireprotov1peer.wirepeer): |
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416 def __init__(self, ui, path, url, opener, requestbuilder, caps): |
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417 self.ui = ui |
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418 self._path = path |
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419 self._url = url |
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420 self._caps = caps |
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421 self._urlopener = opener |
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422 self._requestbuilder = requestbuilder |
4516
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Removed trailing whitespace and tabs from python files
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|
423 |
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close sockets on httprepository deletion (issue1487)
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424 def __del__(self): |
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425 for h in self._urlopener.handlers: |
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426 h.close() |
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427 getattr(h, "close_all", lambda: None)() |
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428 |
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429 # Begin of ipeerconnection interface. |
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430 |
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431 def url(self): |
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432 return self._path |
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433 |
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434 def local(self): |
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435 return None |
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436 |
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437 def peer(self): |
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438 return self |
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439 |
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|
440 def canpush(self): |
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441 return True |
2442
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442 |
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443 def close(self): |
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|
444 pass |
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445 |
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446 # End of ipeerconnection interface. |
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447 |
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448 # Begin of ipeercommands interface. |
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449 |
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450 def capabilities(self): |
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451 return self._caps |
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452 |
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453 # End of ipeercommands interface. |
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|
454 |
30464
e16e234b9ca3
httppeer: do decompression inside _callstream
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diff
changeset
|
455 def _callstream(self, cmd, _compressible=False, **args): |
35359
98bc4c43f570
py3: handle keyword arguments correctly in httppeer.py
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diff
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|
456 args = pycompat.byteskwargs(args) |
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457 |
37549
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|
458 req, cu, qs = makev1commandrequest(self.ui, self._requestbuilder, |
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459 self._caps, self.capable, |
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|
460 self._url, cmd, args) |
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461 |
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|
462 resp = sendrequest(self.ui, self._urlopener, req) |
32002
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httppeer: wrap HTTPResponse.read() globally
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changeset
|
463 |
37558
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|
464 self._url, ct, resp = parsev1commandresponse(self.ui, self._url, cu, qs, |
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|
465 resp, _compressible) |
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parents:
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|
466 |
752 | 467 return resp |
60 | 468 |
11589
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protocol: clean up call-like functions in http and ssh clients
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
469 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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|
470 fp = self._callstream(cmd, **args) |
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parents:
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|
471 try: |
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|
472 return fp.read() |
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changeset
|
473 finally: |
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|
474 # if using keepalive, allow connection to be reused |
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|
475 fp.close() |
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parents:
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diff
changeset
|
476 |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
477 def _callpush(self, cmd, cg, **args): |
2465
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478 # have to stream bundle to a temp file because we do not have |
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479 # http 1.1 chunked transfer. |
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|
480 |
3662
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unduplicate bundle writing code from httprepo
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
|
481 types = self.capable('unbundle') |
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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changeset
|
482 try: |
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parents:
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|
483 types = types.split(',') |
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|
484 except AttributeError: |
14060
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parents:
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|
485 # servers older than d1b16a746db6 will send 'unbundle' as a |
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486 # boolean capability. They only support headerless/uncompressed |
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parents:
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|
487 # bundles. |
3703
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|
488 types = [""] |
14060
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parents:
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|
489 for x in types: |
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Martin von Zweigbergk <martinvonz@google.com>
parents:
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|
490 if x in bundle2.bundletypes: |
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491 type = x |
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|
492 break |
3613
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Client support for hgweb unbundle with versions.
Thomas Arendsen Hein <thomas@intevation.de>
parents:
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diff
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493 |
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parents:
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|
494 tempname = bundle2.writebundle(self.ui, cg, None, type) |
14244
e7525a555a64
url: use new http support if requested by the user
Augie Fackler <durin42@gmail.com>
parents:
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diff
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|
495 fp = httpconnection.httpsendfile(self.ui, tempname, "rb") |
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parents:
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496 headers = {r'Content-Type': r'application/mercurial-0.1'} |
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parents:
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changeset
|
497 |
2465
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diff
changeset
|
498 try: |
25085
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parents:
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diff
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|
499 r = self._call(cmd, data=fp, headers=headers, **args) |
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|
500 vals = r.split('\n', 1) |
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|
501 if len(vals) < 2: |
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parents:
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diff
changeset
|
502 raise error.ResponseError(_("unexpected response:"), r) |
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parents:
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diff
changeset
|
503 return vals |
36430
efebfa9b4cab
httppeer: explicitly catch urlerr.httperror and re-raise
Augie Fackler <augie@google.com>
parents:
36426
diff
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|
504 except urlerr.httperror: |
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parents:
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changeset
|
505 # Catch and re-raise these so we don't try and treat them |
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parents:
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changeset
|
506 # like generic socket errors. They lack any values in |
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Augie Fackler <augie@google.com>
parents:
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|
507 # .args on Python 3 which breaks our socket.error block. |
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parents:
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diff
changeset
|
508 raise |
25660
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parents:
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diff
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|
509 except socket.error as err: |
25085
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parents:
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|
510 if err.args[0] in (errno.ECONNRESET, errno.EPIPE): |
26587
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parents:
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|
511 raise error.Abort(_('push failed: %s') % err.args[1]) |
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|
512 raise error.Abort(err.args[1]) |
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diff
changeset
|
513 finally: |
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|
514 fp.close() |
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|
515 os.unlink(tempname) |
2439
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extend network protocol to stop clients from locking servers
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diff
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|
516 |
21074
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parents:
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diff
changeset
|
517 def _calltwowaystream(self, cmd, fp, **args): |
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diff
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|
518 fh = None |
23086
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parents:
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diff
changeset
|
519 fp_ = None |
21074
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diff
changeset
|
520 filename = None |
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diff
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|
521 try: |
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diff
changeset
|
522 # dump bundle to disk |
38164
aac4be30e250
py3: wrap tempfile.mkstemp() to use bytes path
Yuya Nishihara <yuya@tcha.org>
parents:
37832
diff
changeset
|
523 fd, filename = pycompat.mkstemp(prefix="hg-bundle-", suffix=".hg") |
36835
5bc7ff103081
py3: use r'' instead of sysstr('') to get around code transformer
Yuya Nishihara <yuya@tcha.org>
parents:
36430
diff
changeset
|
524 fh = os.fdopen(fd, r"wb") |
21074
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|
525 d = fp.read(4096) |
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changeset
|
526 while d: |
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diff
changeset
|
527 fh.write(d) |
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changeset
|
528 d = fp.read(4096) |
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changeset
|
529 fh.close() |
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changeset
|
530 # start http push |
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parents:
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diff
changeset
|
531 fp_ = httpconnection.httpsendfile(self.ui, filename, "rb") |
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Augie Fackler <augie@google.com>
parents:
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changeset
|
532 headers = {r'Content-Type': r'application/mercurial-0.1'} |
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parents:
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changeset
|
533 return self._callstream(cmd, data=fp_, headers=headers, **args) |
21074
f8a0d82b0463
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changeset
|
534 finally: |
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changeset
|
535 if fp_ is not None: |
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changeset
|
536 fp_.close() |
21074
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diff
changeset
|
537 if fh is not None: |
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diff
changeset
|
538 fh.close() |
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changeset
|
539 os.unlink(filename) |
f8a0d82b0463
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parents:
20905
diff
changeset
|
540 |
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
|
541 def _callcompressable(self, cmd, **args): |
30464
e16e234b9ca3
httppeer: do decompression inside _callstream
Gregory Szorc <gregory.szorc@gmail.com>
parents:
30241
diff
changeset
|
542 return self._callstream(cmd, _compressible=True, **args) |
11370 | 543 |
21188
d36440d84328
httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa
Mads Kiilerich <madski@unity3d.com>
parents:
21074
diff
changeset
|
544 def _abort(self, exception): |
d36440d84328
httppeer: reintroduce _abort that accidentally was removed in 167047ba3cfa
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parents:
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diff
changeset
|
545 raise exception |
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parents:
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diff
changeset
|
546 |
37651
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parents:
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diff
changeset
|
547 def sendv2request(ui, opener, requestbuilder, apiurl, permission, requests): |
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diff
changeset
|
548 reactor = wireprotoframing.clientreactor(hasmultiplesend=False, |
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diff
changeset
|
549 buffersends=True) |
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diff
changeset
|
550 |
37719
a656cba08a04
wireprotov2: move response handling out of httppeer
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
551 handler = wireprotov2peer.clienthandler(ui, reactor) |
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wireprotov2: move response handling out of httppeer
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changeset
|
552 |
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changeset
|
553 url = '%s/%s' % (apiurl, permission) |
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diff
changeset
|
554 |
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diff
changeset
|
555 if len(requests) > 1: |
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diff
changeset
|
556 url += '/multirequest' |
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diff
changeset
|
557 else: |
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changeset
|
558 url += '/%s' % requests[0][0] |
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diff
changeset
|
559 |
39436
3fe028b657bf
httppeer: log commands for version 2 peer
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parents:
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diff
changeset
|
560 ui.debug('sending %d commands\n' % len(requests)) |
37651
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diff
changeset
|
561 for command, args, f in requests: |
39436
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httppeer: log commands for version 2 peer
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parents:
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diff
changeset
|
562 ui.debug('sending command %s: %s\n' % ( |
3fe028b657bf
httppeer: log commands for version 2 peer
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
563 command, stringutil.pprint(args, indent=2))) |
37719
a656cba08a04
wireprotov2: move response handling out of httppeer
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parents:
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diff
changeset
|
564 assert not list(handler.callcommand(command, args, f)) |
37651
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parents:
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diff
changeset
|
565 |
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diff
changeset
|
566 # TODO stream this. |
37719
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parents:
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diff
changeset
|
567 body = b''.join(map(bytes, handler.flushcommands())) |
37651
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diff
changeset
|
568 |
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parents:
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diff
changeset
|
569 # TODO modify user-agent to reflect v2 |
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diff
changeset
|
570 headers = { |
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parents:
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diff
changeset
|
571 r'Accept': wireprotov2server.FRAMINGTYPE, |
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parents:
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diff
changeset
|
572 r'Content-Type': wireprotov2server.FRAMINGTYPE, |
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parents:
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diff
changeset
|
573 } |
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parents:
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diff
changeset
|
574 |
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parents:
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diff
changeset
|
575 req = requestbuilder(pycompat.strurl(url), body, headers) |
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parents:
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diff
changeset
|
576 req.add_unredirected_header(r'Content-Length', r'%d' % len(body)) |
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parents:
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diff
changeset
|
577 |
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578 try: |
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579 res = opener.open(req) |
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580 except urlerr.httperror as e: |
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581 if e.code == 401: |
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582 raise error.Abort(_('authorization failed')) |
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583 |
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584 raise |
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585 except httplib.HTTPException as e: |
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586 ui.traceback() |
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587 raise IOError(None, e) |
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588 |
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589 return handler, res |
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590 |
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591 class queuedcommandfuture(pycompat.futures.Future): |
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592 """Wraps result() on command futures to trigger submission on call.""" |
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593 |
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594 def result(self, timeout=None): |
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595 if self.done(): |
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596 return pycompat.futures.Future.result(self, timeout) |
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597 |
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598 self._peerexecutor.sendcommands() |
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599 |
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600 # sendcommands() will restore the original __class__ and self.result |
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601 # will resolve to Future.result. |
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602 return self.result(timeout) |
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603 |
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604 @interfaceutil.implementer(repository.ipeercommandexecutor) |
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605 class httpv2executor(object): |
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606 def __init__(self, ui, opener, requestbuilder, apiurl, descriptor): |
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607 self._ui = ui |
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608 self._opener = opener |
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609 self._requestbuilder = requestbuilder |
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610 self._apiurl = apiurl |
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611 self._descriptor = descriptor |
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612 self._sent = False |
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613 self._closed = False |
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614 self._neededpermissions = set() |
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615 self._calls = [] |
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616 self._futures = weakref.WeakSet() |
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617 self._responseexecutor = None |
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618 self._responsef = None |
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619 |
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620 def __enter__(self): |
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621 return self |
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622 |
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623 def __exit__(self, exctype, excvalue, exctb): |
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624 self.close() |
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625 |
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626 def callcommand(self, command, args): |
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627 if self._sent: |
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628 raise error.ProgrammingError('callcommand() cannot be used after ' |
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629 'commands are sent') |
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630 |
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631 if self._closed: |
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632 raise error.ProgrammingError('callcommand() cannot be used after ' |
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633 'close()') |
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634 |
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635 # The service advertises which commands are available. So if we attempt |
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636 # to call an unknown command or pass an unknown argument, we can screen |
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637 # for this. |
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638 if command not in self._descriptor['commands']: |
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639 raise error.ProgrammingError( |
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640 'wire protocol command %s is not available' % command) |
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641 |
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642 cmdinfo = self._descriptor['commands'][command] |
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643 unknownargs = set(args.keys()) - set(cmdinfo.get('args', {})) |
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644 |
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645 if unknownargs: |
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646 raise error.ProgrammingError( |
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647 'wire protocol command %s does not accept argument: %s' % ( |
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648 command, ', '.join(sorted(unknownargs)))) |
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649 |
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650 self._neededpermissions |= set(cmdinfo['permissions']) |
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651 |
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652 # TODO we /could/ also validate types here, since the API descriptor |
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653 # includes types... |
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654 |
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655 f = pycompat.futures.Future() |
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656 |
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657 # Monkeypatch it so result() triggers sendcommands(), otherwise result() |
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658 # could deadlock. |
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659 f.__class__ = queuedcommandfuture |
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660 f._peerexecutor = self |
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661 |
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662 self._futures.add(f) |
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663 self._calls.append((command, args, f)) |
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664 |
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665 return f |
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666 |
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667 def sendcommands(self): |
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668 if self._sent: |
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669 return |
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670 |
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671 if not self._calls: |
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672 return |
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673 |
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674 self._sent = True |
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675 |
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676 # Unhack any future types so caller sees a clean type and so we |
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677 # break reference cycle. |
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678 for f in self._futures: |
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679 if isinstance(f, queuedcommandfuture): |
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680 f.__class__ = pycompat.futures.Future |
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681 f._peerexecutor = None |
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682 |
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683 # Mark the future as running and filter out cancelled futures. |
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684 calls = [(command, args, f) |
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685 for command, args, f in self._calls |
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686 if f.set_running_or_notify_cancel()] |
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687 |
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688 # Clear out references, prevent improper object usage. |
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689 self._calls = None |
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690 |
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691 if not calls: |
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692 return |
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693 |
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694 permissions = set(self._neededpermissions) |
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695 |
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696 if 'push' in permissions and 'pull' in permissions: |
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697 permissions.remove('pull') |
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698 |
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699 if len(permissions) > 1: |
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700 raise error.RepoError(_('cannot make request requiring multiple ' |
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701 'permissions: %s') % |
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702 _(', ').join(sorted(permissions))) |
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703 |
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704 permission = { |
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|
705 'push': 'rw', |
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706 'pull': 'ro', |
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707 }[permissions.pop()] |
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|
708 |
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|
709 handler, resp = sendv2request( |
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710 self._ui, self._opener, self._requestbuilder, self._apiurl, |
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711 permission, calls) |
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|
712 |
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|
713 # TODO we probably want to validate the HTTP code, media type, etc. |
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|
714 |
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715 self._responseexecutor = pycompat.futures.ThreadPoolExecutor(1) |
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716 self._responsef = self._responseexecutor.submit(self._handleresponse, |
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|
717 handler, resp) |
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|
718 |
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|
719 def close(self): |
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720 if self._closed: |
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|
721 return |
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|
722 |
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|
723 self.sendcommands() |
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|
724 |
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725 self._closed = True |
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|
726 |
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|
727 if not self._responsef: |
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|
728 return |
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|
729 |
39437
3c6f7eebc010
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parents:
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|
730 # TODO ^C here may not result in immediate program termination. |
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|
731 |
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|
732 try: |
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|
733 self._responsef.result() |
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|
734 finally: |
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|
735 self._responseexecutor.shutdown(wait=True) |
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|
736 self._responsef = None |
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|
737 self._responseexecutor = None |
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|
738 |
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|
739 # If any of our futures are still in progress, mark them as |
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740 # errored, otherwise a result() could wait indefinitely. |
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|
741 for f in self._futures: |
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diff
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|
742 if not f.done(): |
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diff
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|
743 f.set_exception(error.ResponseError( |
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|
744 _('unfulfilled command response'))) |
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|
745 |
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|
746 self._futures = None |
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|
747 |
37719
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|
748 def _handleresponse(self, handler, resp): |
37651
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|
749 # Called in a thread to read the response. |
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|
750 |
37719
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|
751 while handler.readframe(resp): |
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diff
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|
752 pass |
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|
753 |
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diff
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|
754 # TODO implement interface for version 2 peers |
37810
856f381ad74b
interfaceutil: module to stub out zope.interface
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diff
changeset
|
755 @interfaceutil.implementer(repository.ipeerconnection, |
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diff
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|
756 repository.ipeercapabilities, |
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diff
changeset
|
757 repository.ipeerrequests) |
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|
758 class httpv2peer(object): |
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|
759 def __init__(self, ui, repourl, apipath, opener, requestbuilder, |
8a73132214a3
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diff
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|
760 apidescriptor): |
37483
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diff
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|
761 self.ui = ui |
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diff
changeset
|
762 |
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diff
changeset
|
763 if repourl.endswith('/'): |
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|
764 repourl = repourl[:-1] |
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diff
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|
765 |
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|
766 self._url = repourl |
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767 self._apipath = apipath |
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|
768 self._apiurl = '%s/%s' % (repourl, apipath) |
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|
769 self._opener = opener |
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|
770 self._requestbuilder = requestbuilder |
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|
771 self._descriptor = apidescriptor |
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changeset
|
772 |
37609
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|
773 # Start of ipeerconnection. |
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diff
changeset
|
774 |
01bfe5ad0c53
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diff
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|
775 def url(self): |
01bfe5ad0c53
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|
776 return self._url |
01bfe5ad0c53
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|
777 |
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diff
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|
778 def local(self): |
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diff
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|
779 return None |
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diff
changeset
|
780 |
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changeset
|
781 def peer(self): |
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diff
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|
782 return self |
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diff
changeset
|
783 |
01bfe5ad0c53
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|
784 def canpush(self): |
01bfe5ad0c53
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|
785 # TODO change once implemented. |
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diff
changeset
|
786 return False |
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changeset
|
787 |
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|
788 def close(self): |
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diff
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|
789 pass |
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diff
changeset
|
790 |
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|
791 # End of ipeerconnection. |
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|
792 |
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793 # Start of ipeercapabilities. |
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|
794 |
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|
795 def capable(self, name): |
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|
796 # The capabilities used internally historically map to capabilities |
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|
797 # advertised from the "capabilities" wire protocol command. However, |
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|
798 # version 2 of that command works differently. |
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diff
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|
799 |
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diff
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|
800 # Maps to commands that are available. |
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changeset
|
801 if name in ('branchmap', 'getbundle', 'known', 'lookup', 'pushkey'): |
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|
802 return True |
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diff
changeset
|
803 |
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diff
changeset
|
804 # Other concepts. |
39630
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diff
changeset
|
805 if name in ('bundle2'): |
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|
806 return True |
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diff
changeset
|
807 |
39628
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diff
changeset
|
808 # Alias command-* to presence of command of that name. |
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diff
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|
809 if name.startswith('command-'): |
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diff
changeset
|
810 return name[len('command-'):] in self._descriptor['commands'] |
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diff
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|
811 |
37611
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|
812 return False |
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diff
changeset
|
813 |
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diff
changeset
|
814 def requirecap(self, name, purpose): |
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|
815 if self.capable(name): |
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changeset
|
816 return |
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diff
changeset
|
817 |
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diff
changeset
|
818 raise error.CapabilityError( |
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diff
changeset
|
819 _('cannot %s; client or remote repository does not support the %r ' |
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diff
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|
820 'capability') % (purpose, name)) |
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diff
changeset
|
821 |
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|
822 # End of ipeercapabilities. |
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|
823 |
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changeset
|
824 def _call(self, name, **args): |
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diff
changeset
|
825 with self.commandexecutor() as e: |
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|
826 return e.callcommand(name, args).result() |
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827 |
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828 def commandexecutor(self): |
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829 return httpv2executor(self.ui, self._opener, self._requestbuilder, |
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830 self._apiurl, self._descriptor) |
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831 |
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832 # Registry of API service names to metadata about peers that handle it. |
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833 # |
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834 # The following keys are meaningful: |
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835 # |
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httppeer: support protocol upgrade
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836 # init |
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837 # Callable receiving (ui, repourl, servicepath, opener, requestbuilder, |
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838 # apidescriptor) to create a peer. |
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839 # |
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840 # priority |
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841 # Integer priority for the service. If we could choose from multiple |
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842 # services, we choose the one with the highest priority. |
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|
843 API_PEERS = { |
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844 wireprototypes.HTTP_WIREPROTO_V2: { |
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845 'init': httpv2peer, |
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846 'priority': 50, |
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847 }, |
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848 } |
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849 |
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850 def performhandshake(ui, url, opener, requestbuilder): |
8b8a845c85fc
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851 # The handshake is a request to the capabilities command. |
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852 |
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853 caps = None |
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854 def capable(x): |
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855 raise error.ProgrammingError('should not be called') |
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|
856 |
37558
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857 args = {} |
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|
858 |
8a73132214a3
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859 # The client advertises support for newer protocols by adding an |
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860 # X-HgUpgrade-* header with a list of supported APIs and an |
8a73132214a3
httppeer: support protocol upgrade
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861 # X-HgProto-* header advertising which serializing formats it supports. |
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862 # We only support the HTTP version 2 transport and CBOR responses for |
8a73132214a3
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863 # now. |
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864 advertisev2 = ui.configbool('experimental', 'httppeer.advertise-v2') |
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|
865 |
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|
866 if advertisev2: |
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|
867 args['headers'] = { |
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868 r'X-HgProto-1': r'cbor', |
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|
869 } |
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|
870 |
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|
871 args['headers'].update( |
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|
872 encodevalueinheaders(' '.join(sorted(API_PEERS)), |
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|
873 'X-HgUpgrade', |
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874 # We don't know the header limit this early. |
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|
875 # So make it small. |
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|
876 1024)) |
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|
877 |
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|
878 req, requrl, qs = makev1commandrequest(ui, requestbuilder, caps, |
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879 capable, url, 'capabilities', |
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880 args) |
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881 resp = sendrequest(ui, opener, req) |
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|
882 |
37832
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diff
changeset
|
883 # The server may redirect us to the repo root, stripping the |
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|
884 # ?cmd=capabilities query string from the URL. The server would likely |
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|
885 # return HTML in this case and ``parsev1commandresponse()`` would raise. |
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diff
changeset
|
886 # We catch this special case and re-issue the capabilities request against |
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|
887 # the new URL. |
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|
888 # |
6169d95dce3b
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|
889 # We should ideally not do this, as a redirect that drops the query |
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37810
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|
890 # string from the URL is arguably a server bug. (Garbage in, garbage out). |
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|
891 # However, Mercurial clients for several years appeared to handle this |
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diff
changeset
|
892 # issue without behavior degradation. And according to issue 5860, it may |
6169d95dce3b
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|
893 # be a longstanding bug in some server implementations. So we allow a |
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|
894 # redirect that drops the query string to "just work." |
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changeset
|
895 try: |
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diff
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|
896 respurl, ct, resp = parsev1commandresponse(ui, url, requrl, qs, resp, |
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|
897 compressible=False, |
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|
898 allowcbor=advertisev2) |
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|
899 except RedirectedRepoError as e: |
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|
900 req, requrl, qs = makev1commandrequest(ui, requestbuilder, caps, |
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|
901 capable, e.respurl, |
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|
902 'capabilities', args) |
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|
903 resp = sendrequest(ui, opener, req) |
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|
904 respurl, ct, resp = parsev1commandresponse(ui, url, requrl, qs, resp, |
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|
905 compressible=False, |
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|
906 allowcbor=advertisev2) |
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|
907 |
8b8a845c85fc
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changeset
|
908 try: |
37558
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|
909 rawdata = resp.read() |
37552
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diff
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|
910 finally: |
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
911 resp.close() |
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diff
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|
912 |
37558
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|
913 if not ct.startswith('application/mercurial-'): |
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|
914 raise error.ProgrammingError('unexpected content-type: %s' % ct) |
8a73132214a3
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diff
changeset
|
915 |
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diff
changeset
|
916 if advertisev2: |
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changeset
|
917 if ct == 'application/mercurial-cbor': |
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diff
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|
918 try: |
39445
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39437
diff
changeset
|
919 info = cborutil.decodeall(rawdata)[0] |
cdb56f295b03
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
920 except cborutil.CBORDecodeError: |
37558
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diff
changeset
|
921 raise error.Abort(_('error decoding CBOR from remote server'), |
8a73132214a3
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diff
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|
922 hint=_('try again and consider contacting ' |
8a73132214a3
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diff
changeset
|
923 'the server operator')) |
8a73132214a3
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diff
changeset
|
924 |
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diff
changeset
|
925 # We got a legacy response. That's fine. |
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diff
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|
926 elif ct in ('application/mercurial-0.1', 'application/mercurial-0.2'): |
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|
927 info = { |
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Gregory Szorc <gregory.szorc@gmail.com>
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|
928 'v1capabilities': set(rawdata.split()) |
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|
929 } |
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diff
changeset
|
930 |
8a73132214a3
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diff
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|
931 else: |
8a73132214a3
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Gregory Szorc <gregory.szorc@gmail.com>
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|
932 raise error.RepoError( |
8a73132214a3
httppeer: support protocol upgrade
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changeset
|
933 _('unexpected response type from server: %s') % ct) |
8a73132214a3
httppeer: support protocol upgrade
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diff
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|
934 else: |
8a73132214a3
httppeer: support protocol upgrade
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37556
diff
changeset
|
935 info = { |
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
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|
936 'v1capabilities': set(rawdata.split()) |
8a73132214a3
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parents:
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diff
changeset
|
937 } |
8a73132214a3
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diff
changeset
|
938 |
8a73132214a3
httppeer: support protocol upgrade
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
939 return respurl, info |
37552
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Gregory Szorc <gregory.szorc@gmail.com>
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37551
diff
changeset
|
940 |
37553
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httppeer: allow opener to be passed to makepeer()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37552
diff
changeset
|
941 def makepeer(ui, path, opener=None, requestbuilder=urlreq.request): |
37547
835ccc2a5ef1
httppeer: move requestbuilder defaults into makepeer() argument
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
942 """Construct an appropriate HTTP peer instance. |
835ccc2a5ef1
httppeer: move requestbuilder defaults into makepeer() argument
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diff
changeset
|
943 |
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944 ``opener`` is an ``url.opener`` that should be used to establish |
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945 connections, perform HTTP requests. |
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946 |
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947 ``requestbuilder`` is the type used for constructing HTTP requests. |
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948 It exists as an argument so extensions can override the default. |
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949 """ |
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950 u = util.url(path) |
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951 if u.query or u.fragment: |
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952 raise error.Abort(_('unsupported URL component: "%s"') % |
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953 (u.query or u.fragment)) |
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954 |
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955 # urllib cannot handle URLs with embedded user or passwd. |
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956 url, authinfo = u.authinfo() |
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957 ui.debug('using %s\n' % url) |
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958 |
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959 opener = opener or urlmod.opener(ui, authinfo) |
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960 |
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961 respurl, info = performhandshake(ui, url, opener, requestbuilder) |
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962 |
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963 # Given the intersection of APIs that both we and the server support, |
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964 # sort by their advertised priority and pick the first one. |
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965 # |
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966 # TODO consider making this request-based and interface driven. For |
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967 # example, the caller could say "I want a peer that does X." It's quite |
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968 # possible that not all peers would do that. Since we know the service |
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969 # capabilities, we could filter out services not meeting the |
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970 # requirements. Possibly by consulting the interfaces defined by the |
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971 # peer type. |
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972 apipeerchoices = set(info.get('apis', {}).keys()) & set(API_PEERS.keys()) |
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973 |
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974 preferredchoices = sorted(apipeerchoices, |
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975 key=lambda x: API_PEERS[x]['priority'], |
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976 reverse=True) |
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977 |
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978 for service in preferredchoices: |
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979 apipath = '%s/%s' % (info['apibase'].rstrip('/'), service) |
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980 |
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981 return API_PEERS[service]['init'](ui, respurl, apipath, opener, |
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982 requestbuilder, |
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983 info['apis'][service]) |
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984 |
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985 # Failed to construct an API peer. Fall back to legacy. |
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986 return httppeer(ui, path, respurl, opener, requestbuilder, |
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987 info['v1capabilities']) |
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988 |
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989 def instance(ui, path, create, intents=None, createopts=None): |
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990 if create: |
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991 raise error.Abort(_('cannot create new http repository')) |
7211 | 992 try: |
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993 if path.startswith('https:') and not urlmod.has_https: |
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994 raise error.Abort(_('Python support for SSL and HTTPS ' |
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995 'is not installed')) |
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996 |
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997 inst = makepeer(ui, path) |
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998 |
7211 | 999 return inst |
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1000 except error.RepoError as httpexception: |
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1001 try: |
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1002 r = statichttprepo.instance(ui, "static-" + path, create) |
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1003 ui.note(_('(falling back to static-http)\n')) |
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1004 return r |
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1005 except error.RepoError: |
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1006 raise httpexception # use the original http RepoError instead |