def __init__(
self,
client: Optional[SimpleAsyncHTTPClient],
request: HTTPRequest,
release_callback: Callable[[], None],
final_callback: Callable[[HTTPResponse], None],
max_buffer_size: int,
tcp_client: TCPClient,
max_header_size: int,
max_body_size: int,
) -> None:
self.io_loop = IOLoop.current()
self.start_time = self.io_loop.time()
self.start_wall_time = time.time()
self.client = client
self.request = request
self.release_callback = release_callback
self.final_callback = final_callback
self.max_buffer_size = max_buffer_size
self.tcp_client = tcp_client
self.max_header_size = max_header_size
self.max_body_size = max_body_size
self.code = None # type: Optional[int]
self.headers = None # type: Optional[httputil.HTTPHeaders]
self.chunks = [] # type: List[bytes]
self._decompressor = None
# Timeout handle returned by IOLoop.add_timeout
self._timeout = None # type: object
self._sockaddr = None
IOLoop.current().add_future(gen.convert_yielded(self.run()),
lambda f: f.result())
def _run_callback(self, callback: Callable[[], Any]) -> None:
"""Runs a callback with error handling.
.. versionchanged:: 6.0
CancelledErrors are no longer logged.
"""
try:
ret = callback()
if ret is not None:
from tornado_py3 import gen
# Functions that return Futures typically swallow all
# exceptions and store them in the Future. If a Future
# makes it out to the IOLoop, ensure its exception (if any)
# gets logged too.
try:
ret = gen.convert_yielded(ret)
except gen.BadYieldError:
# It's not unusual for add_callback to be used with
# methods returning a non-None and non-yieldable
# result, which should just be ignored.
pass
else:
self.add_future(ret, self._discard_future_result)
except asyncio.CancelledError:
pass
except Exception:
app_log.error("Exception in callback %r", callback, exc_info=True)
def start_serving(self,
delegate: httputil.HTTPServerConnectionDelegate) -> None:
"""Starts serving requests on this connection.
:arg delegate: a `.HTTPServerConnectionDelegate`
"""
assert isinstance(delegate, httputil.HTTPServerConnectionDelegate)
fut = gen.convert_yielded(self._server_request_loop(delegate))
self._serving_future = fut
# Register the future on the IOLoop so its errors get logged.
self.stream.io_loop.add_future(fut, lambda f: f.result())
def _handle_connection(self, connection: socket.socket,
address: Any) -> None:
if self.ssl_options is not None:
assert ssl, "Python 2.6+ and OpenSSL required for SSL"
try:
connection = ssl_wrap_socket(
connection,
self.ssl_options,
server_side=True,
do_handshake_on_connect=False,
)
except ssl.SSLError as err:
if err.args[0] == ssl.SSL_ERROR_EOF:
return connection.close()
else:
raise
except socket.error as err:
# If the connection is closed immediately after it is created
# (as in a port scan), we can get one of several errors.
# wrap_socket makes an internal call to getpeername,
# which may return either EINVAL (Mac OS X) or ENOTCONN
# (Linux). If it returns ENOTCONN, this error is
# silently swallowed by the ssl module, so we need to
# catch another error later on (AttributeError in
# SSLIOStream._do_ssl_handshake).
# To test this behavior, try nmap with the -sT flag.
# https://github.com/tornadoweb/tornado/pull/750
if errno_from_exception(err) in (errno.ECONNABORTED,
errno.EINVAL):
return connection.close()
else:
raise
try:
if self.ssl_options is not None:
stream = SSLIOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
) # type: IOStream
else:
stream = IOStream(
connection,
max_buffer_size=self.max_buffer_size,
read_chunk_size=self.read_chunk_size,
)
future = self.handle_stream(stream, address)
if future is not None:
IOLoop.current().add_future(gen.convert_yielded(future),
lambda f: f.result())
except Exception:
app_log.error("Error in connection callback", exc_info=True)
def to_asyncio_future(tornado_future: asyncio.Future) -> asyncio.Future:
"""Convert a Tornado yieldable object to an `asyncio.Future`.
.. versionadded:: 4.1
.. versionchanged:: 4.3
Now accepts any yieldable object, not just
`tornado.concurrent.Future`.
.. deprecated:: 5.0
Tornado ``Futures`` have been merged with `asyncio.Future`,
so this method is now equivalent to `tornado.gen.convert_yielded`.
"""
return convert_yielded(tornado_future)
def run() -> None:
try:
result = func()
if result is not None:
from tornado_py3.gen import convert_yielded
result = convert_yielded(result)
except Exception:
fut = Future() # type: Future[Any]
future_cell[0] = fut
future_set_exc_info(fut, sys.exc_info())
else:
if is_future(result):
future_cell[0] = result
else:
fut = Future()
future_cell[0] = fut
fut.set_result(result)
assert future_cell[0] is not None
self.add_future(future_cell[0], lambda future: self.stop())