imcdriver.py 文件源码

def connect(self):
        """Overrides HTTPSConnection.connect to specify TLS version"""
        # Standard implementation from HTTPSConnection, which is not
        # designed for extension, unfortunately
        if sys.version_info >= (2, 7):
            sock = socket.create_connection((self.host, self.port),
                                            self.timeout, self.source_address)
        elif sys.version_info >= (2, 6):
            sock = socket.create_connection((self.host, self.port),
                                            self.timeout)
        else:
            sock = socket.create_connection((self.host, self.port))

        if getattr(self, '_tunnel_host', None):
            self.sock = sock
            self._tunnel()

        if hasattr(ssl, 'SSLContext'):
            # Since python 2.7.9, tls 1.1 and 1.2 are supported via
            # SSLContext
            ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
            ssl_context.options |= ssl.OP_NO_SSLv2
            ssl_context.options |= ssl.OP_NO_SSLv3
            if self.key_file and self.cert_file:
                ssl_context.load_cert_chain(keyfile=self.key_file,
                                            certfile=self.cert_file)
            self.sock = ssl_context.wrap_socket(sock)
        else:
            # This is the only difference; default wrap_socket uses SSLv23
            self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
                                        ssl_version=ssl.PROTOCOL_TLSv1)