def f():
# callbacks run at different times
responses = yield gen.multi_future([
gen.Task(self.delay_callback, 3, arg="v1"),
gen.Task(self.delay_callback, 1, arg="v2"),
])
self.assertEqual(responses, ["v1", "v2"])
self.stop()
def f():
# callbacks run at different times
responses = yield gen.Multi(dict(
foo=gen.Task(self.delay_callback, 3, arg="v1"),
bar=gen.Task(self.delay_callback, 1, arg="v2"),
))
self.assertEqual(responses, dict(foo="v1", bar="v2"))
self.stop()
def capitalize(self, request_data, callback):
logging.info('capitalize')
stream = IOStream(socket.socket(), io_loop=self.io_loop)
logging.info('connecting')
yield gen.Task(stream.connect, ('127.0.0.1', self.port))
stream.write(utf8(request_data + '\n'))
logging.info('reading')
data = yield gen.Task(stream.read_until, b'\n')
logging.info('returning')
stream.close()
callback(self.process_response(data))
def test_pass_callback(self):
@gen.coroutine
def f():
raise gen.Return(42)
result = yield gen.Task(f)
self.assertEqual(result, 42)
self.finished = True
def outer():
for i in range(10):
yield gen.Task(inner)
stack_increase = _stack_depth() - initial_stack_depth
self.assertTrue(stack_increase <= 2)
self.stop()
def f():
(yield gen.Callback("noargs"))()
self.assertEqual((yield gen.Wait("noargs")), None)
(yield gen.Callback("1arg"))(42)
self.assertEqual((yield gen.Wait("1arg")), 42)
(yield gen.Callback("kwargs"))(value=42)
result = yield gen.Wait("kwargs")
self.assertTrue(isinstance(result, gen.Arguments))
self.assertEqual(((), dict(value=42)), result)
self.assertEqual(dict(value=42), result.kwargs)
(yield gen.Callback("2args"))(42, 43)
result = yield gen.Wait("2args")
self.assertTrue(isinstance(result, gen.Arguments))
self.assertEqual(((42, 43), {}), result)
self.assertEqual((42, 43), result.args)
def task_func(callback):
callback(None, error="foo")
result = yield gen.Task(task_func)
self.assertTrue(isinstance(result, gen.Arguments))
self.assertEqual(((None,), dict(error="foo")), result)
self.stop()
def test_multi_mixed_types(self):
# A YieldPoint (Wait) and Future (Task) can be combined
# (and use the YieldPoint codepath)
(yield gen.Callback("k1"))("v1")
responses = yield [gen.Wait("k1"),
gen.Task(self.delay_callback, 3, arg="v2")]
self.assertEqual(responses, ["v1", "v2"])
def resolve(self, host, port, family=0):
# getHostByName doesn't accept IP addresses, so if the input
# looks like an IP address just return it immediately.
if twisted.internet.abstract.isIPAddress(host):
resolved = host
resolved_family = socket.AF_INET
elif twisted.internet.abstract.isIPv6Address(host):
resolved = host
resolved_family = socket.AF_INET6
else:
deferred = self.resolver.getHostByName(utf8(host))
resolved = yield gen.Task(deferred.addBoth)
if isinstance(resolved, failure.Failure):
try:
resolved.raiseException()
except twisted.names.error.DomainError as e:
raise IOError(e)
elif twisted.internet.abstract.isIPAddress(resolved):
resolved_family = socket.AF_INET
elif twisted.internet.abstract.isIPv6Address(resolved):
resolved_family = socket.AF_INET6
else:
resolved_family = socket.AF_UNSPEC
if family != socket.AF_UNSPEC and family != resolved_family:
raise Exception('Requested socket family %d but got %d' %
(family, resolved_family))
result = [
(resolved_family, (resolved, port)),
]
raise gen.Return(result)
def test_multi_performance(self):
# Yielding a list used to have quadratic performance; make
# sure a large list stays reasonable. On my laptop a list of
# 2000 used to take 1.8s, now it takes 0.12.
start = time.time()
yield [gen.Task(self.io_loop.add_callback) for i in range(2000)]
end = time.time()
self.assertLess(end - start, 1.0)
def f(callback):
yield gen.Task(self.io_loop.add_callback)
try:
1 / 0
except ZeroDivisionError:
self.expected_frame = traceback.extract_tb(
sys.exc_info()[2], limit=1)[0]
raise
def f2():
(yield gen.Callback(1))()
yield gen.Wait(1)
self.io_loop.add_callback(lambda: 1 / 0)
try:
yield gen.Task(self.io_loop.add_timeout,
self.io_loop.time() + 10)
except ZeroDivisionError:
raise gen.Return(42)
def f():
class Foo(object):
pass
arg = Foo()
self.arg_ref = weakref.ref(arg)
task = gen.Task(self.io_loop.add_callback, arg=arg)
self.task_ref = weakref.ref(task)
yield task
self.stop()
def outer():
for i in range(10):
try:
yield gen.Task(inner)
except ZeroDivisionError:
pass
stack_increase = len(stack_context._state.contexts) - initial_stack_depth
self.assertTrue(stack_increase <= 2)
self.stop()
def get(self):
# TODO: would be nice to go through the login flow instead of
# cheating with a hard-coded access token.
response = yield gen.Task(self.twitter_request,
'/users/show/%s' % self.get_argument('name'),
access_token=dict(key='hjkl', secret='vbnm'))
if response is None:
self.set_status(500)
self.finish('error from twitter request')
else:
self.finish(response)
def get(self):
io_loop = self.request.connection.stream.io_loop
# Test the interaction of the two stack_contexts.
def fail_task(callback):
io_loop.add_callback(lambda: 1 / 0)
try:
yield gen.Task(fail_task)
raise Exception("did not get expected exception")
except ZeroDivisionError:
self.finish('ok')
def test_body_size_override_reset(self):
# The max_body_size override is reset between requests.
stream = IOStream(socket.socket())
try:
yield stream.connect(('127.0.0.1', self.get_http_port()))
# Use a raw stream so we can make sure it's all on one connection.
stream.write(b'PUT /streaming?expected_size=10240 HTTP/1.1\r\n'
b'Content-Length: 10240\r\n\r\n')
stream.write(b'a' * 10240)
headers, response = yield gen.Task(read_stream_body, stream)
self.assertEqual(response, b'10240')
# Without the ?expected_size parameter, we get the old default value
stream.write(b'PUT /streaming HTTP/1.1\r\n'
b'Content-Length: 10240\r\n\r\n')
with ExpectLog(gen_log, '.*Content-Length too long'):
data = yield stream.read_until_close()
self.assertEqual(data, b'')
finally:
stream.close()
def test(self):
yield gen.Task(self.io_loop.add_timeout, self.io_loop.time() + 1)
def test_async(self):
yield gen.Task(self.io_loop.add_callback)
self.finished = True
def e1():
for i in range(10):
yield gen.Task(e2)
def f():
yield gen.Task(self.io_loop.add_callback)
1 / 0
def f():
yield gen.Task(self.io_loop.add_callback)
raise gen.Return(42)
def get(self):
self.write('hello ')
yield gen.Task(self.flush)
self.write('world')
yield gen.Task(self.flush)
self.finish()
def async_body_producer(self, write):
yield write(b'1234')
yield gen.Task(IOLoop.current().add_callback)
yield write(b'5678')
def test_long_timeout(self):
time = self.io_loop.time
yield gen.Task(self.io_loop.add_timeout, time() + 0.25)
def tornado_coroutine():
yield gen.Task(self.io_loop.add_callback)
raise gen.Return(42)
def test_with_args(self, *args):
self.assertEqual(args, ('test',))
yield gen.Task(self.io_loop.add_callback)
def test_short_timeout(self):
time = self.io_loop.time
yield gen.Task(self.io_loop.add_timeout, time() + 1)
def f():
with ExceptionStackContext(lambda t, v, tb: False):
yield gen.Task(self.io_loop.add_callback)
def test_with_kwargs(self, **kwargs):
self.assertDictEqual(kwargs, {'test': 'test'})
yield gen.Task(self.io_loop.add_callback)
def f2():
self.assertEqual(self.active_contexts, ['c1', 'c2'])
yield gen.Task(self.io_loop.add_callback)
self.assertEqual(self.active_contexts, ['c1', 'c2'])
