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546 lines
21 KiB
Python
546 lines
21 KiB
Python
10 years ago
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from __future__ import absolute_import, division, print_function, with_statement
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from tornado import netutil
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from tornado.ioloop import IOLoop
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from tornado.iostream import IOStream, SSLIOStream, PipeIOStream
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from tornado.log import gen_log, app_log
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from tornado.netutil import ssl_wrap_socket
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from tornado.stack_context import NullContext
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from tornado.testing import AsyncHTTPTestCase, AsyncHTTPSTestCase, AsyncTestCase, bind_unused_port, ExpectLog
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from tornado.test.util import unittest, skipIfNonUnix
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from tornado.web import RequestHandler, Application
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import errno
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import logging
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import os
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import platform
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import socket
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import ssl
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import sys
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class HelloHandler(RequestHandler):
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def get(self):
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self.write("Hello")
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class TestIOStreamWebMixin(object):
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def _make_client_iostream(self):
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raise NotImplementedError()
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def get_app(self):
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return Application([('/', HelloHandler)])
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def test_connection_closed(self):
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# When a server sends a response and then closes the connection,
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# the client must be allowed to read the data before the IOStream
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# closes itself. Epoll reports closed connections with a separate
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# EPOLLRDHUP event delivered at the same time as the read event,
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# while kqueue reports them as a second read/write event with an EOF
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# flag.
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response = self.fetch("/", headers={"Connection": "close"})
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response.rethrow()
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def test_read_until_close(self):
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stream = self._make_client_iostream()
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stream.connect(('localhost', self.get_http_port()), callback=self.stop)
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self.wait()
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stream.write(b"GET / HTTP/1.0\r\n\r\n")
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stream.read_until_close(self.stop)
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data = self.wait()
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self.assertTrue(data.startswith(b"HTTP/1.0 200"))
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self.assertTrue(data.endswith(b"Hello"))
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def test_read_zero_bytes(self):
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self.stream = self._make_client_iostream()
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self.stream.connect(("localhost", self.get_http_port()),
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callback=self.stop)
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self.wait()
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self.stream.write(b"GET / HTTP/1.0\r\n\r\n")
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# normal read
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self.stream.read_bytes(9, self.stop)
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data = self.wait()
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self.assertEqual(data, b"HTTP/1.0 ")
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# zero bytes
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self.stream.read_bytes(0, self.stop)
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data = self.wait()
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self.assertEqual(data, b"")
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# another normal read
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self.stream.read_bytes(3, self.stop)
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data = self.wait()
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self.assertEqual(data, b"200")
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self.stream.close()
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def test_write_while_connecting(self):
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stream = self._make_client_iostream()
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connected = [False]
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def connected_callback():
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connected[0] = True
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self.stop()
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stream.connect(("localhost", self.get_http_port()),
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callback=connected_callback)
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# unlike the previous tests, try to write before the connection
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# is complete.
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written = [False]
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def write_callback():
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written[0] = True
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self.stop()
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stream.write(b"GET / HTTP/1.0\r\nConnection: close\r\n\r\n",
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callback=write_callback)
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self.assertTrue(not connected[0])
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# by the time the write has flushed, the connection callback has
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# also run
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try:
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self.wait(lambda: connected[0] and written[0])
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finally:
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logging.debug((connected, written))
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stream.read_until_close(self.stop)
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data = self.wait()
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self.assertTrue(data.endswith(b"Hello"))
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stream.close()
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class TestIOStreamMixin(object):
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def _make_server_iostream(self, connection, **kwargs):
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raise NotImplementedError()
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def _make_client_iostream(self, connection, **kwargs):
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raise NotImplementedError()
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def make_iostream_pair(self, **kwargs):
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listener, port = bind_unused_port()
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streams = [None, None]
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def accept_callback(connection, address):
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streams[0] = self._make_server_iostream(connection, **kwargs)
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if isinstance(streams[0], SSLIOStream):
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# HACK: The SSL handshake won't complete (and
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# therefore the client connect callback won't be
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# run)until the server side has tried to do something
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# with the connection. For these tests we want both
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# sides to connect before we do anything else with the
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# connection, so we must cause some dummy activity on the
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# server. If this turns out to be useful for real apps
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# it should have a cleaner interface.
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streams[0]._add_io_state(IOLoop.READ)
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self.stop()
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def connect_callback():
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streams[1] = client_stream
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self.stop()
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netutil.add_accept_handler(listener, accept_callback,
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io_loop=self.io_loop)
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client_stream = self._make_client_iostream(socket.socket(), **kwargs)
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client_stream.connect(('127.0.0.1', port),
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callback=connect_callback)
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self.wait(condition=lambda: all(streams))
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self.io_loop.remove_handler(listener.fileno())
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listener.close()
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return streams
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def test_streaming_callback_with_data_in_buffer(self):
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server, client = self.make_iostream_pair()
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client.write(b"abcd\r\nefgh")
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server.read_until(b"\r\n", self.stop)
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data = self.wait()
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self.assertEqual(data, b"abcd\r\n")
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def closed_callback(chunk):
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self.fail()
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server.read_until_close(callback=closed_callback,
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streaming_callback=self.stop)
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# self.io_loop.add_timeout(self.io_loop.time() + 0.01, self.stop)
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data = self.wait()
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self.assertEqual(data, b"efgh")
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server.close()
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client.close()
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def test_write_zero_bytes(self):
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# Attempting to write zero bytes should run the callback without
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# going into an infinite loop.
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server, client = self.make_iostream_pair()
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server.write(b'', callback=self.stop)
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self.wait()
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# As a side effect, the stream is now listening for connection
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# close (if it wasn't already), but is not listening for writes
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self.assertEqual(server._state, IOLoop.READ | IOLoop.ERROR)
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server.close()
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client.close()
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def test_connection_refused(self):
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# When a connection is refused, the connect callback should not
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# be run. (The kqueue IOLoop used to behave differently from the
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# epoll IOLoop in this respect)
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server_socket, port = bind_unused_port()
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server_socket.close()
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stream = IOStream(socket.socket(), self.io_loop)
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self.connect_called = False
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def connect_callback():
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self.connect_called = True
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stream.set_close_callback(self.stop)
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# log messages vary by platform and ioloop implementation
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with ExpectLog(gen_log, ".*", required=False):
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stream.connect(("localhost", port), connect_callback)
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self.wait()
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self.assertFalse(self.connect_called)
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self.assertTrue(isinstance(stream.error, socket.error), stream.error)
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if sys.platform != 'cygwin':
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# cygwin's errnos don't match those used on native windows python
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self.assertEqual(stream.error.args[0], errno.ECONNREFUSED)
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def test_gaierror(self):
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# Test that IOStream sets its exc_info on getaddrinfo error
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
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stream = IOStream(s, io_loop=self.io_loop)
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stream.set_close_callback(self.stop)
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# To reliably generate a gaierror we use a malformed domain name
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# instead of a name that's simply unlikely to exist (since
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# opendns and some ISPs return bogus addresses for nonexistent
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# domains instead of the proper error codes).
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with ExpectLog(gen_log, "Connect error"):
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stream.connect(('an invalid domain', 54321))
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self.assertTrue(isinstance(stream.error, socket.gaierror), stream.error)
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def test_read_callback_error(self):
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# Test that IOStream sets its exc_info when a read callback throws
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server, client = self.make_iostream_pair()
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try:
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server.set_close_callback(self.stop)
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with ExpectLog(
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app_log, "(Uncaught exception|Exception in callback)"
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):
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# Clear ExceptionStackContext so IOStream catches error
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with NullContext():
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server.read_bytes(1, callback=lambda data: 1 / 0)
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client.write(b"1")
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self.wait()
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self.assertTrue(isinstance(server.error, ZeroDivisionError))
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finally:
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server.close()
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client.close()
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def test_streaming_callback(self):
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server, client = self.make_iostream_pair()
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try:
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chunks = []
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final_called = []
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def streaming_callback(data):
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chunks.append(data)
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self.stop()
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def final_callback(data):
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self.assertFalse(data)
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final_called.append(True)
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self.stop()
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server.read_bytes(6, callback=final_callback,
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streaming_callback=streaming_callback)
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client.write(b"1234")
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self.wait(condition=lambda: chunks)
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client.write(b"5678")
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self.wait(condition=lambda: final_called)
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self.assertEqual(chunks, [b"1234", b"56"])
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# the rest of the last chunk is still in the buffer
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server.read_bytes(2, callback=self.stop)
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data = self.wait()
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self.assertEqual(data, b"78")
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finally:
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server.close()
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client.close()
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def test_streaming_until_close(self):
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server, client = self.make_iostream_pair()
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try:
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chunks = []
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closed = [False]
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def streaming_callback(data):
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chunks.append(data)
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self.stop()
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def close_callback(data):
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assert not data, data
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closed[0] = True
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self.stop()
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client.read_until_close(callback=close_callback,
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streaming_callback=streaming_callback)
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server.write(b"1234")
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self.wait(condition=lambda: len(chunks) == 1)
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server.write(b"5678", self.stop)
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self.wait()
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server.close()
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self.wait(condition=lambda: closed[0])
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self.assertEqual(chunks, [b"1234", b"5678"])
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finally:
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server.close()
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client.close()
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def test_delayed_close_callback(self):
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# The scenario: Server closes the connection while there is a pending
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# read that can be served out of buffered data. The client does not
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# run the close_callback as soon as it detects the close, but rather
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# defers it until after the buffered read has finished.
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server, client = self.make_iostream_pair()
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try:
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client.set_close_callback(self.stop)
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server.write(b"12")
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chunks = []
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def callback1(data):
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chunks.append(data)
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client.read_bytes(1, callback2)
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server.close()
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def callback2(data):
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chunks.append(data)
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client.read_bytes(1, callback1)
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self.wait() # stopped by close_callback
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self.assertEqual(chunks, [b"1", b"2"])
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finally:
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server.close()
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client.close()
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def test_close_buffered_data(self):
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# Similar to the previous test, but with data stored in the OS's
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# socket buffers instead of the IOStream's read buffer. Out-of-band
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# close notifications must be delayed until all data has been
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# drained into the IOStream buffer. (epoll used to use out-of-band
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# close events with EPOLLRDHUP, but no longer)
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#
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# This depends on the read_chunk_size being smaller than the
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# OS socket buffer, so make it small.
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server, client = self.make_iostream_pair(read_chunk_size=256)
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try:
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server.write(b"A" * 512)
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client.read_bytes(256, self.stop)
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data = self.wait()
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self.assertEqual(b"A" * 256, data)
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server.close()
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# Allow the close to propagate to the client side of the
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# connection. Using add_callback instead of add_timeout
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# doesn't seem to work, even with multiple iterations
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self.io_loop.add_timeout(self.io_loop.time() + 0.01, self.stop)
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self.wait()
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client.read_bytes(256, self.stop)
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data = self.wait()
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self.assertEqual(b"A" * 256, data)
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finally:
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server.close()
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client.close()
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def test_read_until_close_after_close(self):
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# Similar to test_delayed_close_callback, but read_until_close takes
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# a separate code path so test it separately.
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server, client = self.make_iostream_pair()
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client.set_close_callback(self.stop)
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try:
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server.write(b"1234")
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server.close()
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self.wait()
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client.read_until_close(self.stop)
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data = self.wait()
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self.assertEqual(data, b"1234")
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finally:
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server.close()
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client.close()
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def test_streaming_read_until_close_after_close(self):
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# Same as the preceding test but with a streaming_callback.
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# All data should go through the streaming callback,
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# and the final read callback just gets an empty string.
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server, client = self.make_iostream_pair()
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client.set_close_callback(self.stop)
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try:
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server.write(b"1234")
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|
server.close()
|
||
|
|
self.wait()
|
||
|
|
streaming_data = []
|
||
|
|
client.read_until_close(self.stop,
|
||
|
|
streaming_callback=streaming_data.append)
|
||
|
|
data = self.wait()
|
||
|
|
self.assertEqual(b'', data)
|
||
|
|
self.assertEqual(b''.join(streaming_data), b"1234")
|
||
|
|
finally:
|
||
|
|
server.close()
|
||
|
|
client.close()
|
||
|
|
|
||
|
|
def test_large_read_until(self):
|
||
|
|
# Performance test: read_until used to have a quadratic component
|
||
|
|
# so a read_until of 4MB would take 8 seconds; now it takes 0.25
|
||
|
|
# seconds.
|
||
|
|
server, client = self.make_iostream_pair()
|
||
|
|
try:
|
||
|
|
# This test fails on pypy with ssl. I think it's because
|
||
|
|
# pypy's gc defeats moves objects, breaking the
|
||
|
|
# "frozen write buffer" assumption.
|
||
|
|
if (isinstance(server, SSLIOStream) and
|
||
|
|
platform.python_implementation() == 'PyPy'):
|
||
|
|
raise unittest.SkipTest(
|
||
|
|
"pypy gc causes problems with openssl")
|
||
|
|
NUM_KB = 4096
|
||
|
|
for i in range(NUM_KB):
|
||
|
|
client.write(b"A" * 1024)
|
||
|
|
client.write(b"\r\n")
|
||
|
|
server.read_until(b"\r\n", self.stop)
|
||
|
|
data = self.wait()
|
||
|
|
self.assertEqual(len(data), NUM_KB * 1024 + 2)
|
||
|
|
finally:
|
||
|
|
server.close()
|
||
|
|
client.close()
|
||
|
|
|
||
|
|
def test_close_callback_with_pending_read(self):
|
||
|
|
# Regression test for a bug that was introduced in 2.3
|
||
|
|
# where the IOStream._close_callback would never be called
|
||
|
|
# if there were pending reads.
|
||
|
|
OK = b"OK\r\n"
|
||
|
|
server, client = self.make_iostream_pair()
|
||
|
|
client.set_close_callback(self.stop)
|
||
|
|
try:
|
||
|
|
server.write(OK)
|
||
|
|
client.read_until(b"\r\n", self.stop)
|
||
|
|
res = self.wait()
|
||
|
|
self.assertEqual(res, OK)
|
||
|
|
|
||
|
|
server.close()
|
||
|
|
client.read_until(b"\r\n", lambda x: x)
|
||
|
|
# If _close_callback (self.stop) is not called,
|
||
|
|
# an AssertionError: Async operation timed out after 5 seconds
|
||
|
|
# will be raised.
|
||
|
|
res = self.wait()
|
||
|
|
self.assertTrue(res is None)
|
||
|
|
finally:
|
||
|
|
server.close()
|
||
|
|
client.close()
|
||
|
|
|
||
|
|
@skipIfNonUnix
|
||
|
|
def test_inline_read_error(self):
|
||
|
|
# An error on an inline read is raised without logging (on the
|
||
|
|
# assumption that it will eventually be noticed or logged further
|
||
|
|
# up the stack).
|
||
|
|
#
|
||
|
|
# This test is posix-only because windows os.close() doesn't work
|
||
|
|
# on socket FDs, but we can't close the socket object normally
|
||
|
|
# because we won't get the error we want if the socket knows
|
||
|
|
# it's closed.
|
||
|
|
server, client = self.make_iostream_pair()
|
||
|
|
try:
|
||
|
|
os.close(server.socket.fileno())
|
||
|
|
with self.assertRaises(socket.error):
|
||
|
|
server.read_bytes(1, lambda data: None)
|
||
|
|
finally:
|
||
|
|
server.close()
|
||
|
|
client.close()
|
||
|
|
|
||
|
|
def test_async_read_error_logging(self):
|
||
|
|
# Socket errors on asynchronous reads should be logged (but only
|
||
|
|
# once).
|
||
|
|
server, client = self.make_iostream_pair()
|
||
|
|
server.set_close_callback(self.stop)
|
||
|
|
try:
|
||
|
|
# Start a read that will be fullfilled asynchronously.
|
||
|
|
server.read_bytes(1, lambda data: None)
|
||
|
|
client.write(b'a')
|
||
|
|
# Stub out read_from_fd to make it fail.
|
||
|
|
|
||
|
|
def fake_read_from_fd():
|
||
|
|
os.close(server.socket.fileno())
|
||
|
|
server.__class__.read_from_fd(server)
|
||
|
|
server.read_from_fd = fake_read_from_fd
|
||
|
|
# This log message is from _handle_read (not read_from_fd).
|
||
|
|
with ExpectLog(gen_log, "error on read"):
|
||
|
|
self.wait()
|
||
|
|
finally:
|
||
|
|
server.close()
|
||
|
|
client.close()
|
||
|
|
|
||
|
|
|
||
|
|
class TestIOStreamWebHTTP(TestIOStreamWebMixin, AsyncHTTPTestCase):
|
||
|
|
def _make_client_iostream(self):
|
||
|
|
return IOStream(socket.socket(), io_loop=self.io_loop)
|
||
|
|
|
||
|
|
|
||
|
|
class TestIOStreamWebHTTPS(TestIOStreamWebMixin, AsyncHTTPSTestCase):
|
||
|
|
def _make_client_iostream(self):
|
||
|
|
return SSLIOStream(socket.socket(), io_loop=self.io_loop)
|
||
|
|
|
||
|
|
|
||
|
|
class TestIOStream(TestIOStreamMixin, AsyncTestCase):
|
||
|
|
def _make_server_iostream(self, connection, **kwargs):
|
||
|
|
return IOStream(connection, **kwargs)
|
||
|
|
|
||
|
|
def _make_client_iostream(self, connection, **kwargs):
|
||
|
|
return IOStream(connection, **kwargs)
|
||
|
|
|
||
|
|
|
||
|
|
class TestIOStreamSSL(TestIOStreamMixin, AsyncTestCase):
|
||
|
|
def _make_server_iostream(self, connection, **kwargs):
|
||
|
|
ssl_options = dict(
|
||
|
|
certfile=os.path.join(os.path.dirname(__file__), 'test.crt'),
|
||
|
|
keyfile=os.path.join(os.path.dirname(__file__), 'test.key'),
|
||
|
|
)
|
||
|
|
connection = ssl.wrap_socket(connection,
|
||
|
|
server_side=True,
|
||
|
|
do_handshake_on_connect=False,
|
||
|
|
**ssl_options)
|
||
|
|
return SSLIOStream(connection, io_loop=self.io_loop, **kwargs)
|
||
|
|
|
||
|
|
def _make_client_iostream(self, connection, **kwargs):
|
||
|
|
return SSLIOStream(connection, io_loop=self.io_loop, **kwargs)
|
||
|
|
|
||
|
|
|
||
|
|
# This will run some tests that are basically redundant but it's the
|
||
|
|
# simplest way to make sure that it works to pass an SSLContext
|
||
|
|
# instead of an ssl_options dict to the SSLIOStream constructor.
|
||
|
|
@unittest.skipIf(not hasattr(ssl, 'SSLContext'), 'ssl.SSLContext not present')
|
||
|
|
class TestIOStreamSSLContext(TestIOStreamMixin, AsyncTestCase):
|
||
|
|
def _make_server_iostream(self, connection, **kwargs):
|
||
|
|
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
|
||
|
|
context.load_cert_chain(
|
||
|
|
os.path.join(os.path.dirname(__file__), 'test.crt'),
|
||
|
|
os.path.join(os.path.dirname(__file__), 'test.key'))
|
||
|
|
connection = ssl_wrap_socket(connection, context,
|
||
|
|
server_side=True,
|
||
|
|
do_handshake_on_connect=False)
|
||
|
|
return SSLIOStream(connection, io_loop=self.io_loop, **kwargs)
|
||
|
|
|
||
|
|
def _make_client_iostream(self, connection, **kwargs):
|
||
|
|
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
|
||
|
|
return SSLIOStream(connection, io_loop=self.io_loop,
|
||
|
|
ssl_options=context, **kwargs)
|
||
|
|
|
||
|
|
|
||
|
|
@skipIfNonUnix
|
||
|
|
class TestPipeIOStream(AsyncTestCase):
|
||
|
|
def test_pipe_iostream(self):
|
||
|
|
r, w = os.pipe()
|
||
|
|
|
||
|
|
rs = PipeIOStream(r, io_loop=self.io_loop)
|
||
|
|
ws = PipeIOStream(w, io_loop=self.io_loop)
|
||
|
|
|
||
|
|
ws.write(b"hel")
|
||
|
|
ws.write(b"lo world")
|
||
|
|
|
||
|
|
rs.read_until(b' ', callback=self.stop)
|
||
|
|
data = self.wait()
|
||
|
|
self.assertEqual(data, b"hello ")
|
||
|
|
|
||
|
|
rs.read_bytes(3, self.stop)
|
||
|
|
data = self.wait()
|
||
|
|
self.assertEqual(data, b"wor")
|
||
|
|
|
||
|
|
ws.close()
|
||
|
|
|
||
|
|
rs.read_until_close(self.stop)
|
||
|
|
data = self.wait()
|
||
|
|
self.assertEqual(data, b"ld")
|
||
|
|
|
||
|
|
rs.close()
|