Method connect_to_server

tornado/test/iostream_test.py:1107–1133

(self, server_cls)

class WaitForHandshakeTest(AsyncTestCase):
    @gen.coroutine
    def connect_to_server(self, server_cls):
        server = client = None
        try:
            sock, port = bind_unused_port()
            server = server_cls(ssl_options=_server_ssl_options())
            server.add_socket(sock)

            ssl_ctx = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
            ssl_ctx.check_hostname = False
            ssl_ctx.verify_mode = ssl.CERT_NONE
            # These tests fail with ConnectionAbortedErrors with TLS
            # 1.3 on windows python 3.7.4 (which includes an upgrade
            # to openssl 1.1.c. Other platforms might be affected with
            # newer openssl too). Disable it until we figure out
            # what's up.
            # Update 2021-12-28: Still happening with Python 3.10 on
            # Windows. OP_NO_TLSv1_3 now raises a DeprecationWarning.
            with ignore_deprecation():
                ssl_ctx.options |= getattr(ssl, "OP_NO_TLSv1_3", 0)
                client = SSLIOStream(socket.socket(), ssl_options=ssl_ctx)
            yield client.connect(("127.0.0.1", port))
            self.assertIsNotNone(client.socket.cipher())
        finally:
            if server is not None:
                server.stop()
            if client is not None:
                client.close()

    @gen_test
    def test_wait_for_handshake_future(self):