Mercurial > hg
annotate mercurial/httpclient/socketutil.py @ 22328:fba8c1a4ce21
obsolete: extract the part of _readmarkers specific to format version 0
If we are to introduce new formats we need to be able call different
functions for different formats. Creating a function for format
version 0 is the first step.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Mon, 25 Aug 2014 14:58:11 +0200 |
parents | 59df9e52b5bb |
children | 328739ea70c3 |
rev | line source |
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1 # Copyright 2010, Google Inc. |
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2 # All rights reserved. |
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3 # |
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4 # Redistribution and use in source and binary forms, with or without |
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5 # modification, are permitted provided that the following conditions are |
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6 # met: |
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7 # |
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8 # * Redistributions of source code must retain the above copyright |
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9 # notice, this list of conditions and the following disclaimer. |
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10 # * Redistributions in binary form must reproduce the above |
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11 # copyright notice, this list of conditions and the following disclaimer |
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12 # in the documentation and/or other materials provided with the |
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13 # distribution. |
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14 # * Neither the name of Google Inc. nor the names of its |
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15 # contributors may be used to endorse or promote products derived from |
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16 # this software without specific prior written permission. |
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17 |
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18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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19 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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20 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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21 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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22 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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23 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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25 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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26 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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27 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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28 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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29 """Abstraction to simplify socket use for Python < 2.6 |
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30 |
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31 This will attempt to use the ssl module and the new |
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32 socket.create_connection method, but fall back to the old |
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33 methods if those are unavailable. |
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34 """ |
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35 import logging |
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36 import socket |
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37 |
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38 logger = logging.getLogger(__name__) |
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39 |
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40 try: |
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41 import ssl |
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42 # make demandimporters load the module |
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43 ssl.wrap_socket # pylint: disable=W0104 |
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44 have_ssl = True |
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45 except ImportError: |
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46 import httplib |
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47 import urllib2 |
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48 have_ssl = getattr(urllib2, 'HTTPSHandler', False) |
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49 ssl = False |
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50 |
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51 |
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52 try: |
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53 create_connection = socket.create_connection |
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54 except AttributeError: |
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55 def create_connection(address): |
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56 """Backport of socket.create_connection from Python 2.6.""" |
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57 host, port = address |
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58 msg = "getaddrinfo returns an empty list" |
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59 sock = None |
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60 for res in socket.getaddrinfo(host, port, 0, |
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61 socket.SOCK_STREAM): |
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62 af, socktype, proto, unused_canonname, sa = res |
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63 try: |
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64 sock = socket.socket(af, socktype, proto) |
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65 logger.info("connect: (%s, %s)", host, port) |
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66 sock.connect(sa) |
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67 except socket.error, msg: |
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68 logger.info('connect fail: %s %s', host, port) |
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69 if sock: |
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70 sock.close() |
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71 sock = None |
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72 continue |
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73 break |
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74 if not sock: |
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75 raise socket.error(msg) |
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76 return sock |
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77 |
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78 if ssl: |
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79 wrap_socket = ssl.wrap_socket |
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80 CERT_NONE = ssl.CERT_NONE |
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81 CERT_OPTIONAL = ssl.CERT_OPTIONAL |
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82 CERT_REQUIRED = ssl.CERT_REQUIRED |
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83 else: |
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84 class FakeSocket(httplib.FakeSocket): |
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85 """Socket wrapper that supports SSL.""" |
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86 |
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87 # Silence lint about this goofy backport class |
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88 # pylint: disable=W0232,E1101,R0903,R0913,C0111 |
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89 |
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90 # backport the behavior from Python 2.6, which is to busy wait |
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91 # on the socket instead of anything nice. Sigh. |
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92 # See http://bugs.python.org/issue3890 for more info. |
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93 def recv(self, buflen=1024, flags=0): |
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94 """ssl-aware wrapper around socket.recv |
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95 """ |
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96 if flags != 0: |
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97 raise ValueError( |
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98 "non-zero flags not allowed in calls to recv() on %s" % |
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99 self.__class__) |
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100 while True: |
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101 try: |
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102 return self._ssl.read(buflen) |
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103 except socket.sslerror, x: |
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104 if x.args[0] == socket.SSL_ERROR_WANT_READ: |
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105 continue |
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106 else: |
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107 raise x |
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108 |
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109 _PROTOCOL_SSLv23 = 2 |
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110 |
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111 CERT_NONE = 0 |
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112 CERT_OPTIONAL = 1 |
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113 CERT_REQUIRED = 2 |
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114 |
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115 # Disable unused-argument because we're making a dumb wrapper |
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116 # that's like an upstream method. |
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117 # |
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118 # pylint: disable=W0613,R0913 |
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119 def wrap_socket(sock, keyfile=None, certfile=None, |
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120 server_side=False, cert_reqs=CERT_NONE, |
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121 ssl_version=_PROTOCOL_SSLv23, ca_certs=None, |
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122 do_handshake_on_connect=True, |
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123 suppress_ragged_eofs=True): |
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124 """Backport of ssl.wrap_socket from Python 2.6.""" |
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125 if cert_reqs != CERT_NONE and ca_certs: |
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126 raise CertificateValidationUnsupported( |
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127 'SSL certificate validation requires the ssl module' |
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128 '(included in Python 2.6 and later.)') |
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129 sslob = socket.ssl(sock) |
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130 # borrow httplib's workaround for no ssl.wrap_socket |
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131 sock = FakeSocket(sock, sslob) |
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132 return sock |
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133 # pylint: enable=W0613,R0913 |
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134 |
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135 |
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136 class CertificateValidationUnsupported(Exception): |
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137 """Exception raised when cert validation is requested but unavailable.""" |
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138 # no-check-code |