Mercurial > hg
view mercurial/httpclient/socketutil.py @ 15917:e66084ef8449
rebase: fix phases movement
Rebase now try to keep the phases of source changesets.
author | Alain Leufroy <alain.leufroyATgmailMYDOTcom> |
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date | Tue, 17 Jan 2012 09:12:14 +0100 |
parents | 494b26ad8736 |
children | f614543733b6 |
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# Copyright 2010, Google Inc. # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # # * Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # * Redistributions in binary form must reproduce the above # copyright notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # * Neither the name of Google Inc. nor the names of its # contributors may be used to endorse or promote products derived from # this software without specific prior written permission. # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. """Abstraction to simplify socket use for Python < 2.6 This will attempt to use the ssl module and the new socket.create_connection method, but fall back to the old methods if those are unavailable. """ import logging import socket logger = logging.getLogger(__name__) try: import ssl ssl.wrap_socket # make demandimporters load the module have_ssl = True except ImportError: import httplib import urllib2 have_ssl = getattr(urllib2, 'HTTPSHandler', False) ssl = False try: create_connection = socket.create_connection except AttributeError: def create_connection(address): host, port = address msg = "getaddrinfo returns an empty list" sock = None for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM): af, socktype, proto, _canonname, sa = res try: sock = socket.socket(af, socktype, proto) logger.info("connect: (%s, %s)", host, port) sock.connect(sa) except socket.error, msg: logger.info('connect fail: %s %s', host, port) if sock: sock.close() sock = None continue break if not sock: raise socket.error, msg return sock if ssl: wrap_socket = ssl.wrap_socket CERT_NONE = ssl.CERT_NONE CERT_OPTIONAL = ssl.CERT_OPTIONAL CERT_REQUIRED = ssl.CERT_REQUIRED else: class FakeSocket(httplib.FakeSocket): """Socket wrapper that supports SSL. """ # backport the behavior from Python 2.6, which is to busy wait # on the socket instead of anything nice. Sigh. # See http://bugs.python.org/issue3890 for more info. def recv(self, buflen=1024, flags=0): """ssl-aware wrapper around socket.recv """ if flags != 0: raise ValueError( "non-zero flags not allowed in calls to recv() on %s" % self.__class__) while True: try: return self._ssl.read(buflen) except socket.sslerror, x: if x.args[0] == socket.SSL_ERROR_WANT_READ: continue else: raise x _PROTOCOL_SSLv23 = 2 CERT_NONE = 0 CERT_OPTIONAL = 1 CERT_REQUIRED = 2 def wrap_socket(sock, keyfile=None, certfile=None, server_side=False, cert_reqs=CERT_NONE, ssl_version=_PROTOCOL_SSLv23, ca_certs=None, do_handshake_on_connect=True, suppress_ragged_eofs=True): if cert_reqs != CERT_NONE and ca_certs: raise CertificateValidationUnsupported( 'SSL certificate validation requires the ssl module' '(included in Python 2.6 and later.)') sslob = socket.ssl(sock) # borrow httplib's workaround for no ssl.wrap_socket sock = FakeSocket(sock, sslob) return sock class CertificateValidationUnsupported(Exception): """Exception raised when cert validation is requested but unavailable.""" # no-check-code