connection.py 文件源码

def _connect_socket(self):
        sockerr = None
        addresses = socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM)
        if not addresses:
            raise ConnectionException("getaddrinfo returned empty list for %s" % (self.host,))
        for (af, socktype, proto, canonname, sockaddr) in addresses:
            try:
                self._socket = self._socket_impl.socket(af, socktype, proto)
                if self.ssl_options:
                    if not self._ssl_impl:
                        raise RuntimeError("This version of Python was not compiled with SSL support")
                    self._socket = self._ssl_impl.wrap_socket(self._socket, **self.ssl_options)
                self._socket.settimeout(self.connect_timeout)
                self._socket.connect(sockaddr)
                self._socket.settimeout(None)
                if self._check_hostname:
                    ssl.match_hostname(self._socket.getpeercert(), self.host)
                sockerr = None
                break
            except socket.error as err:
                if self._socket:
                    self._socket.close()
                    self._socket = None
                sockerr = err

        if sockerr:
            raise socket.error(sockerr.errno, "Tried connecting to %s. Last error: %s" % ([a[4] for a in addresses], sockerr.strerror or sockerr))

        if self.sockopts:
            for args in self.sockopts:
                self._socket.setsockopt(*args)