Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1 | """Event loop using a selector and related classes. |
| 2 | |
| 3 | A selector is a "notify-when-ready" multiplexer. For a subclass which |
| 4 | also includes support for signal handling, see the unix_events sub-module. |
| 5 | """ |
| 6 | |
Victor Stinner | 8dffc45 | 2014-01-25 15:32:06 +0100 | [diff] [blame] | 7 | __all__ = ['BaseSelectorEventLoop'] |
| 8 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 9 | import collections |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 10 | import errno |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 11 | import functools |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 12 | import socket |
| 13 | try: |
| 14 | import ssl |
| 15 | except ImportError: # pragma: no cover |
| 16 | ssl = None |
| 17 | |
| 18 | from . import base_events |
| 19 | from . import constants |
| 20 | from . import events |
| 21 | from . import futures |
| 22 | from . import selectors |
| 23 | from . import transports |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 24 | from .log import logger |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 25 | |
| 26 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 27 | def _test_selector_event(selector, fd, event): |
| 28 | # Test if the selector is monitoring 'event' events |
| 29 | # for the file descriptor 'fd'. |
| 30 | try: |
| 31 | key = selector.get_key(fd) |
| 32 | except KeyError: |
| 33 | return False |
| 34 | else: |
| 35 | return bool(key.events & event) |
| 36 | |
| 37 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 38 | class BaseSelectorEventLoop(base_events.BaseEventLoop): |
| 39 | """Selector event loop. |
| 40 | |
| 41 | See events.EventLoop for API specification. |
| 42 | """ |
| 43 | |
| 44 | def __init__(self, selector=None): |
| 45 | super().__init__() |
| 46 | |
| 47 | if selector is None: |
| 48 | selector = selectors.DefaultSelector() |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 49 | logger.debug('Using selector: %s', selector.__class__.__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 50 | self._selector = selector |
| 51 | self._make_self_pipe() |
| 52 | |
| 53 | def _make_socket_transport(self, sock, protocol, waiter=None, *, |
| 54 | extra=None, server=None): |
| 55 | return _SelectorSocketTransport(self, sock, protocol, waiter, |
| 56 | extra, server) |
| 57 | |
| 58 | def _make_ssl_transport(self, rawsock, protocol, sslcontext, waiter, *, |
| 59 | server_side=False, server_hostname=None, |
| 60 | extra=None, server=None): |
| 61 | return _SelectorSslTransport( |
| 62 | self, rawsock, protocol, sslcontext, waiter, |
| 63 | server_side, server_hostname, extra, server) |
| 64 | |
| 65 | def _make_datagram_transport(self, sock, protocol, |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 66 | address=None, waiter=None, extra=None): |
| 67 | return _SelectorDatagramTransport(self, sock, protocol, |
| 68 | address, waiter, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 69 | |
| 70 | def close(self): |
Victor Stinner | 956de69 | 2014-12-26 21:07:52 +0100 | [diff] [blame^] | 71 | if self.is_running(): |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 72 | raise RuntimeError("Cannot close a running event loop") |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 73 | if self.is_closed(): |
| 74 | return |
| 75 | self._close_self_pipe() |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 76 | super().close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 77 | if self._selector is not None: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 78 | self._selector.close() |
| 79 | self._selector = None |
| 80 | |
| 81 | def _socketpair(self): |
| 82 | raise NotImplementedError |
| 83 | |
| 84 | def _close_self_pipe(self): |
| 85 | self.remove_reader(self._ssock.fileno()) |
| 86 | self._ssock.close() |
| 87 | self._ssock = None |
| 88 | self._csock.close() |
| 89 | self._csock = None |
| 90 | self._internal_fds -= 1 |
| 91 | |
| 92 | def _make_self_pipe(self): |
| 93 | # A self-socket, really. :-) |
| 94 | self._ssock, self._csock = self._socketpair() |
| 95 | self._ssock.setblocking(False) |
| 96 | self._csock.setblocking(False) |
| 97 | self._internal_fds += 1 |
| 98 | self.add_reader(self._ssock.fileno(), self._read_from_self) |
| 99 | |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 100 | def _process_self_data(self, data): |
| 101 | pass |
| 102 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 103 | def _read_from_self(self): |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 104 | while True: |
| 105 | try: |
| 106 | data = self._ssock.recv(4096) |
| 107 | if not data: |
| 108 | break |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 109 | self._process_self_data(data) |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 110 | except InterruptedError: |
| 111 | continue |
| 112 | except BlockingIOError: |
| 113 | break |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 114 | |
| 115 | def _write_to_self(self): |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 116 | # This may be called from a different thread, possibly after |
| 117 | # _close_self_pipe() has been called or even while it is |
| 118 | # running. Guard for self._csock being None or closed. When |
| 119 | # a socket is closed, send() raises OSError (with errno set to |
| 120 | # EBADF, but let's not rely on the exact error code). |
| 121 | csock = self._csock |
| 122 | if csock is not None: |
| 123 | try: |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 124 | csock.send(b'\0') |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 125 | except OSError: |
Victor Stinner | 65dd69a | 2014-07-25 22:36:05 +0200 | [diff] [blame] | 126 | if self._debug: |
| 127 | logger.debug("Fail to write a null byte into the " |
| 128 | "self-pipe socket", |
| 129 | exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 130 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 131 | def _start_serving(self, protocol_factory, sock, |
| 132 | sslcontext=None, server=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 133 | self.add_reader(sock.fileno(), self._accept_connection, |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 134 | protocol_factory, sock, sslcontext, server) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 135 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 136 | def _accept_connection(self, protocol_factory, sock, |
| 137 | sslcontext=None, server=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 138 | try: |
| 139 | conn, addr = sock.accept() |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 140 | if self._debug: |
| 141 | logger.debug("%r got a new connection from %r: %r", |
| 142 | server, addr, conn) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 143 | conn.setblocking(False) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 144 | except (BlockingIOError, InterruptedError, ConnectionAbortedError): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 145 | pass # False alarm. |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 146 | except OSError as exc: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 147 | # There's nowhere to send the error, so just log it. |
| 148 | # TODO: Someone will want an error handler for this. |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 149 | if exc.errno in (errno.EMFILE, errno.ENFILE, |
| 150 | errno.ENOBUFS, errno.ENOMEM): |
| 151 | # Some platforms (e.g. Linux keep reporting the FD as |
| 152 | # ready, so we remove the read handler temporarily. |
| 153 | # We'll try again in a while. |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 154 | self.call_exception_handler({ |
| 155 | 'message': 'socket.accept() out of system resource', |
| 156 | 'exception': exc, |
| 157 | 'socket': sock, |
| 158 | }) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 159 | self.remove_reader(sock.fileno()) |
| 160 | self.call_later(constants.ACCEPT_RETRY_DELAY, |
| 161 | self._start_serving, |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 162 | protocol_factory, sock, sslcontext, server) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 163 | else: |
| 164 | raise # The event loop will catch, log and ignore it. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 165 | else: |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 166 | if sslcontext: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 167 | self._make_ssl_transport( |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 168 | conn, protocol_factory(), sslcontext, None, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 169 | server_side=True, extra={'peername': addr}, server=server) |
| 170 | else: |
| 171 | self._make_socket_transport( |
| 172 | conn, protocol_factory(), extra={'peername': addr}, |
| 173 | server=server) |
| 174 | # It's now up to the protocol to handle the connection. |
| 175 | |
| 176 | def add_reader(self, fd, callback, *args): |
| 177 | """Add a reader callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 178 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 179 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 180 | try: |
| 181 | key = self._selector.get_key(fd) |
| 182 | except KeyError: |
| 183 | self._selector.register(fd, selectors.EVENT_READ, |
| 184 | (handle, None)) |
| 185 | else: |
| 186 | mask, (reader, writer) = key.events, key.data |
| 187 | self._selector.modify(fd, mask | selectors.EVENT_READ, |
| 188 | (handle, writer)) |
| 189 | if reader is not None: |
| 190 | reader.cancel() |
| 191 | |
| 192 | def remove_reader(self, fd): |
| 193 | """Remove a reader callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 194 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 195 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 196 | try: |
| 197 | key = self._selector.get_key(fd) |
| 198 | except KeyError: |
| 199 | return False |
| 200 | else: |
| 201 | mask, (reader, writer) = key.events, key.data |
| 202 | mask &= ~selectors.EVENT_READ |
| 203 | if not mask: |
| 204 | self._selector.unregister(fd) |
| 205 | else: |
| 206 | self._selector.modify(fd, mask, (None, writer)) |
| 207 | |
| 208 | if reader is not None: |
| 209 | reader.cancel() |
| 210 | return True |
| 211 | else: |
| 212 | return False |
| 213 | |
| 214 | def add_writer(self, fd, callback, *args): |
| 215 | """Add a writer callback..""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 216 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 217 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 218 | try: |
| 219 | key = self._selector.get_key(fd) |
| 220 | except KeyError: |
| 221 | self._selector.register(fd, selectors.EVENT_WRITE, |
| 222 | (None, handle)) |
| 223 | else: |
| 224 | mask, (reader, writer) = key.events, key.data |
| 225 | self._selector.modify(fd, mask | selectors.EVENT_WRITE, |
| 226 | (reader, handle)) |
| 227 | if writer is not None: |
| 228 | writer.cancel() |
| 229 | |
| 230 | def remove_writer(self, fd): |
| 231 | """Remove a writer callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 232 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 233 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 234 | try: |
| 235 | key = self._selector.get_key(fd) |
| 236 | except KeyError: |
| 237 | return False |
| 238 | else: |
| 239 | mask, (reader, writer) = key.events, key.data |
| 240 | # Remove both writer and connector. |
| 241 | mask &= ~selectors.EVENT_WRITE |
| 242 | if not mask: |
| 243 | self._selector.unregister(fd) |
| 244 | else: |
| 245 | self._selector.modify(fd, mask, (reader, None)) |
| 246 | |
| 247 | if writer is not None: |
| 248 | writer.cancel() |
| 249 | return True |
| 250 | else: |
| 251 | return False |
| 252 | |
| 253 | def sock_recv(self, sock, n): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 254 | """Receive data from the socket. |
| 255 | |
| 256 | The return value is a bytes object representing the data received. |
| 257 | The maximum amount of data to be received at once is specified by |
| 258 | nbytes. |
| 259 | |
| 260 | This method is a coroutine. |
| 261 | """ |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 262 | if self.get_debug() and sock.gettimeout() != 0: |
| 263 | raise ValueError("the socket must be non-blocking") |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 264 | fut = futures.Future(loop=self) |
| 265 | self._sock_recv(fut, False, sock, n) |
| 266 | return fut |
| 267 | |
| 268 | def _sock_recv(self, fut, registered, sock, n): |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 269 | # _sock_recv() can add itself as an I/O callback if the operation can't |
Yury Selivanov | b0b0e62 | 2014-02-18 22:27:48 -0500 | [diff] [blame] | 270 | # be done immediately. Don't use it directly, call sock_recv(). |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 271 | fd = sock.fileno() |
| 272 | if registered: |
| 273 | # Remove the callback early. It should be rare that the |
| 274 | # selector says the fd is ready but the call still returns |
| 275 | # EAGAIN, and I am willing to take a hit in that case in |
| 276 | # order to simplify the common case. |
| 277 | self.remove_reader(fd) |
| 278 | if fut.cancelled(): |
| 279 | return |
| 280 | try: |
| 281 | data = sock.recv(n) |
| 282 | except (BlockingIOError, InterruptedError): |
| 283 | self.add_reader(fd, self._sock_recv, fut, True, sock, n) |
| 284 | except Exception as exc: |
| 285 | fut.set_exception(exc) |
| 286 | else: |
| 287 | fut.set_result(data) |
| 288 | |
| 289 | def sock_sendall(self, sock, data): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 290 | """Send data to the socket. |
| 291 | |
| 292 | The socket must be connected to a remote socket. This method continues |
| 293 | to send data from data until either all data has been sent or an |
| 294 | error occurs. None is returned on success. On error, an exception is |
| 295 | raised, and there is no way to determine how much data, if any, was |
| 296 | successfully processed by the receiving end of the connection. |
| 297 | |
| 298 | This method is a coroutine. |
| 299 | """ |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 300 | if self.get_debug() and sock.gettimeout() != 0: |
| 301 | raise ValueError("the socket must be non-blocking") |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 302 | fut = futures.Future(loop=self) |
| 303 | if data: |
| 304 | self._sock_sendall(fut, False, sock, data) |
| 305 | else: |
| 306 | fut.set_result(None) |
| 307 | return fut |
| 308 | |
| 309 | def _sock_sendall(self, fut, registered, sock, data): |
| 310 | fd = sock.fileno() |
| 311 | |
| 312 | if registered: |
| 313 | self.remove_writer(fd) |
| 314 | if fut.cancelled(): |
| 315 | return |
| 316 | |
| 317 | try: |
| 318 | n = sock.send(data) |
| 319 | except (BlockingIOError, InterruptedError): |
| 320 | n = 0 |
| 321 | except Exception as exc: |
| 322 | fut.set_exception(exc) |
| 323 | return |
| 324 | |
| 325 | if n == len(data): |
| 326 | fut.set_result(None) |
| 327 | else: |
| 328 | if n: |
| 329 | data = data[n:] |
| 330 | self.add_writer(fd, self._sock_sendall, fut, True, sock, data) |
| 331 | |
| 332 | def sock_connect(self, sock, address): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 333 | """Connect to a remote socket at address. |
| 334 | |
| 335 | The address must be already resolved to avoid the trap of hanging the |
| 336 | entire event loop when the address requires doing a DNS lookup. For |
| 337 | example, it must be an IP address, not an hostname, for AF_INET and |
| 338 | AF_INET6 address families. Use getaddrinfo() to resolve the hostname |
| 339 | asynchronously. |
| 340 | |
| 341 | This method is a coroutine. |
| 342 | """ |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 343 | if self.get_debug() and sock.gettimeout() != 0: |
| 344 | raise ValueError("the socket must be non-blocking") |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 345 | fut = futures.Future(loop=self) |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 346 | try: |
| 347 | base_events._check_resolved_address(sock, address) |
| 348 | except ValueError as err: |
| 349 | fut.set_exception(err) |
| 350 | else: |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 351 | self._sock_connect(fut, sock, address) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 352 | return fut |
| 353 | |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 354 | def _sock_connect(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 355 | fd = sock.fileno() |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 356 | try: |
| 357 | while True: |
| 358 | try: |
| 359 | sock.connect(address) |
| 360 | except InterruptedError: |
| 361 | continue |
| 362 | else: |
| 363 | break |
| 364 | except BlockingIOError: |
| 365 | fut.add_done_callback(functools.partial(self._sock_connect_done, |
| 366 | sock)) |
| 367 | self.add_writer(fd, self._sock_connect_cb, fut, sock, address) |
| 368 | except Exception as exc: |
| 369 | fut.set_exception(exc) |
| 370 | else: |
| 371 | fut.set_result(None) |
| 372 | |
| 373 | def _sock_connect_done(self, sock, fut): |
| 374 | self.remove_writer(sock.fileno()) |
| 375 | |
| 376 | def _sock_connect_cb(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 377 | if fut.cancelled(): |
| 378 | return |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 379 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 380 | try: |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 381 | err = sock.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR) |
| 382 | if err != 0: |
| 383 | # Jump to any except clause below. |
| 384 | raise OSError(err, 'Connect call failed %s' % (address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 385 | except (BlockingIOError, InterruptedError): |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 386 | # socket is still registered, the callback will be retried later |
| 387 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 388 | except Exception as exc: |
| 389 | fut.set_exception(exc) |
| 390 | else: |
| 391 | fut.set_result(None) |
| 392 | |
| 393 | def sock_accept(self, sock): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 394 | """Accept a connection. |
| 395 | |
| 396 | The socket must be bound to an address and listening for connections. |
| 397 | The return value is a pair (conn, address) where conn is a new socket |
| 398 | object usable to send and receive data on the connection, and address |
| 399 | is the address bound to the socket on the other end of the connection. |
| 400 | |
| 401 | This method is a coroutine. |
| 402 | """ |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 403 | if self.get_debug() and sock.gettimeout() != 0: |
| 404 | raise ValueError("the socket must be non-blocking") |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 405 | fut = futures.Future(loop=self) |
| 406 | self._sock_accept(fut, False, sock) |
| 407 | return fut |
| 408 | |
| 409 | def _sock_accept(self, fut, registered, sock): |
| 410 | fd = sock.fileno() |
| 411 | if registered: |
| 412 | self.remove_reader(fd) |
| 413 | if fut.cancelled(): |
| 414 | return |
| 415 | try: |
| 416 | conn, address = sock.accept() |
| 417 | conn.setblocking(False) |
| 418 | except (BlockingIOError, InterruptedError): |
| 419 | self.add_reader(fd, self._sock_accept, fut, True, sock) |
| 420 | except Exception as exc: |
| 421 | fut.set_exception(exc) |
| 422 | else: |
| 423 | fut.set_result((conn, address)) |
| 424 | |
| 425 | def _process_events(self, event_list): |
| 426 | for key, mask in event_list: |
| 427 | fileobj, (reader, writer) = key.fileobj, key.data |
| 428 | if mask & selectors.EVENT_READ and reader is not None: |
| 429 | if reader._cancelled: |
| 430 | self.remove_reader(fileobj) |
| 431 | else: |
| 432 | self._add_callback(reader) |
| 433 | if mask & selectors.EVENT_WRITE and writer is not None: |
| 434 | if writer._cancelled: |
| 435 | self.remove_writer(fileobj) |
| 436 | else: |
| 437 | self._add_callback(writer) |
| 438 | |
| 439 | def _stop_serving(self, sock): |
| 440 | self.remove_reader(sock.fileno()) |
| 441 | sock.close() |
| 442 | |
| 443 | |
Yury Selivanov | c098241 | 2014-02-18 18:41:13 -0500 | [diff] [blame] | 444 | class _SelectorTransport(transports._FlowControlMixin, |
| 445 | transports.Transport): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 446 | |
| 447 | max_size = 256 * 1024 # Buffer size passed to recv(). |
| 448 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 449 | _buffer_factory = bytearray # Constructs initial value for self._buffer. |
| 450 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 451 | def __init__(self, loop, sock, protocol, extra, server=None): |
Victor Stinner | 004adb9 | 2014-11-05 15:27:41 +0100 | [diff] [blame] | 452 | super().__init__(extra, loop) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 453 | self._extra['socket'] = sock |
| 454 | self._extra['sockname'] = sock.getsockname() |
| 455 | if 'peername' not in self._extra: |
| 456 | try: |
| 457 | self._extra['peername'] = sock.getpeername() |
| 458 | except socket.error: |
| 459 | self._extra['peername'] = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 460 | self._sock = sock |
| 461 | self._sock_fd = sock.fileno() |
| 462 | self._protocol = protocol |
| 463 | self._server = server |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 464 | self._buffer = self._buffer_factory() |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 465 | self._conn_lost = 0 # Set when call to connection_lost scheduled. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 466 | self._closing = False # Set when close() called. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 467 | if self._server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 468 | self._server._attach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 469 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 470 | def __repr__(self): |
Victor Stinner | 0e34dc3 | 2014-10-12 09:52:11 +0200 | [diff] [blame] | 471 | info = [self.__class__.__name__] |
| 472 | if self._sock is None: |
| 473 | info.append('closed') |
| 474 | elif self._closing: |
| 475 | info.append('closing') |
| 476 | info.append('fd=%s' % self._sock_fd) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 477 | # test if the transport was closed |
| 478 | if self._loop is not None: |
| 479 | polling = _test_selector_event(self._loop._selector, |
| 480 | self._sock_fd, selectors.EVENT_READ) |
| 481 | if polling: |
| 482 | info.append('read=polling') |
| 483 | else: |
| 484 | info.append('read=idle') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 485 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 486 | polling = _test_selector_event(self._loop._selector, |
| 487 | self._sock_fd, selectors.EVENT_WRITE) |
| 488 | if polling: |
| 489 | state = 'polling' |
| 490 | else: |
| 491 | state = 'idle' |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 492 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 493 | bufsize = self.get_write_buffer_size() |
| 494 | info.append('write=<%s, bufsize=%s>' % (state, bufsize)) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 495 | return '<%s>' % ' '.join(info) |
| 496 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 497 | def abort(self): |
| 498 | self._force_close(None) |
| 499 | |
| 500 | def close(self): |
| 501 | if self._closing: |
| 502 | return |
| 503 | self._closing = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 504 | self._loop.remove_reader(self._sock_fd) |
| 505 | if not self._buffer: |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 506 | self._conn_lost += 1 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 507 | self._loop.call_soon(self._call_connection_lost, None) |
| 508 | |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 509 | def _fatal_error(self, exc, message='Fatal error on transport'): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 510 | # Should be called from exception handler only. |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 511 | if isinstance(exc, (BrokenPipeError, ConnectionResetError)): |
| 512 | if self._loop.get_debug(): |
| 513 | logger.debug("%r: %s", self, message, exc_info=True) |
| 514 | else: |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 515 | self._loop.call_exception_handler({ |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 516 | 'message': message, |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 517 | 'exception': exc, |
| 518 | 'transport': self, |
| 519 | 'protocol': self._protocol, |
| 520 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 521 | self._force_close(exc) |
| 522 | |
| 523 | def _force_close(self, exc): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 524 | if self._conn_lost: |
| 525 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 526 | if self._buffer: |
| 527 | self._buffer.clear() |
| 528 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 529 | if not self._closing: |
| 530 | self._closing = True |
| 531 | self._loop.remove_reader(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 532 | self._conn_lost += 1 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 533 | self._loop.call_soon(self._call_connection_lost, exc) |
| 534 | |
| 535 | def _call_connection_lost(self, exc): |
| 536 | try: |
| 537 | self._protocol.connection_lost(exc) |
| 538 | finally: |
| 539 | self._sock.close() |
| 540 | self._sock = None |
| 541 | self._protocol = None |
| 542 | self._loop = None |
| 543 | server = self._server |
| 544 | if server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 545 | server._detach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 546 | self._server = None |
| 547 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 548 | def get_write_buffer_size(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 549 | return len(self._buffer) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 550 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 551 | |
| 552 | class _SelectorSocketTransport(_SelectorTransport): |
| 553 | |
| 554 | def __init__(self, loop, sock, protocol, waiter=None, |
| 555 | extra=None, server=None): |
| 556 | super().__init__(loop, sock, protocol, extra, server) |
| 557 | self._eof = False |
| 558 | self._paused = False |
| 559 | |
| 560 | self._loop.add_reader(self._sock_fd, self._read_ready) |
| 561 | self._loop.call_soon(self._protocol.connection_made, self) |
| 562 | if waiter is not None: |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 563 | # wait until protocol.connection_made() has been called |
Victor Stinner | 799a60c | 2014-07-07 18:08:22 +0200 | [diff] [blame] | 564 | self._loop.call_soon(waiter._set_result_unless_cancelled, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 565 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 566 | def pause_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 567 | if self._closing: |
| 568 | raise RuntimeError('Cannot pause_reading() when closing') |
| 569 | if self._paused: |
| 570 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 571 | self._paused = True |
| 572 | self._loop.remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 573 | if self._loop.get_debug(): |
| 574 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 575 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 576 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 577 | if not self._paused: |
| 578 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 579 | self._paused = False |
| 580 | if self._closing: |
| 581 | return |
| 582 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 583 | if self._loop.get_debug(): |
| 584 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 585 | |
| 586 | def _read_ready(self): |
| 587 | try: |
| 588 | data = self._sock.recv(self.max_size) |
| 589 | except (BlockingIOError, InterruptedError): |
| 590 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 591 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 592 | self._fatal_error(exc, 'Fatal read error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 593 | else: |
| 594 | if data: |
| 595 | self._protocol.data_received(data) |
| 596 | else: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 597 | if self._loop.get_debug(): |
| 598 | logger.debug("%r received EOF", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 599 | keep_open = self._protocol.eof_received() |
Guido van Rossum | 1f683bb | 2013-10-30 14:36:58 -0700 | [diff] [blame] | 600 | if keep_open: |
| 601 | # We're keeping the connection open so the |
| 602 | # protocol can write more, but we still can't |
| 603 | # receive more, so remove the reader callback. |
| 604 | self._loop.remove_reader(self._sock_fd) |
| 605 | else: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 606 | self.close() |
| 607 | |
| 608 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 609 | if not isinstance(data, (bytes, bytearray, memoryview)): |
| 610 | raise TypeError('data argument must be byte-ish (%r)', |
| 611 | type(data)) |
| 612 | if self._eof: |
| 613 | raise RuntimeError('Cannot call write() after write_eof()') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 614 | if not data: |
| 615 | return |
| 616 | |
| 617 | if self._conn_lost: |
| 618 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 619 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 620 | self._conn_lost += 1 |
| 621 | return |
| 622 | |
| 623 | if not self._buffer: |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 624 | # Optimization: try to send now. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 625 | try: |
| 626 | n = self._sock.send(data) |
| 627 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 628 | pass |
| 629 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 630 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 631 | return |
| 632 | else: |
| 633 | data = data[n:] |
| 634 | if not data: |
| 635 | return |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 636 | # Not all was written; register write handler. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 637 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 638 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 639 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 640 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 641 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 642 | |
| 643 | def _write_ready(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 644 | assert self._buffer, 'Data should not be empty' |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 645 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 646 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 647 | n = self._sock.send(self._buffer) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 648 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 649 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 650 | except Exception as exc: |
| 651 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 652 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 653 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 654 | else: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 655 | if n: |
| 656 | del self._buffer[:n] |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 657 | self._maybe_resume_protocol() # May append to buffer. |
| 658 | if not self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 659 | self._loop.remove_writer(self._sock_fd) |
| 660 | if self._closing: |
| 661 | self._call_connection_lost(None) |
| 662 | elif self._eof: |
| 663 | self._sock.shutdown(socket.SHUT_WR) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 664 | |
| 665 | def write_eof(self): |
| 666 | if self._eof: |
| 667 | return |
| 668 | self._eof = True |
| 669 | if not self._buffer: |
| 670 | self._sock.shutdown(socket.SHUT_WR) |
| 671 | |
| 672 | def can_write_eof(self): |
| 673 | return True |
| 674 | |
| 675 | |
| 676 | class _SelectorSslTransport(_SelectorTransport): |
| 677 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 678 | _buffer_factory = bytearray |
| 679 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 680 | def __init__(self, loop, rawsock, protocol, sslcontext, waiter=None, |
| 681 | server_side=False, server_hostname=None, |
| 682 | extra=None, server=None): |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 683 | if ssl is None: |
| 684 | raise RuntimeError('stdlib ssl module not available') |
| 685 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 686 | if server_side: |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 687 | if not sslcontext: |
| 688 | raise ValueError('Server side ssl needs a valid SSLContext') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 689 | else: |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 690 | if not sslcontext: |
| 691 | # Client side may pass ssl=True to use a default |
| 692 | # context; in that case the sslcontext passed is None. |
Antoine Pitrou | fd39a89 | 2014-10-15 16:58:21 +0200 | [diff] [blame] | 693 | # The default is secure for client connections. |
| 694 | if hasattr(ssl, 'create_default_context'): |
| 695 | # Python 3.4+: use up-to-date strong settings. |
| 696 | sslcontext = ssl.create_default_context() |
| 697 | if not server_hostname: |
| 698 | sslcontext.check_hostname = False |
Guido van Rossum | 7fa6e1a | 2013-11-23 15:36:43 -0800 | [diff] [blame] | 699 | else: |
| 700 | # Fallback for Python 3.3. |
| 701 | sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23) |
| 702 | sslcontext.options |= ssl.OP_NO_SSLv2 |
Antoine Pitrou | fd39a89 | 2014-10-15 16:58:21 +0200 | [diff] [blame] | 703 | sslcontext.options |= ssl.OP_NO_SSLv3 |
Guido van Rossum | 7fa6e1a | 2013-11-23 15:36:43 -0800 | [diff] [blame] | 704 | sslcontext.set_default_verify_paths() |
| 705 | sslcontext.verify_mode = ssl.CERT_REQUIRED |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 706 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 707 | wrap_kwargs = { |
| 708 | 'server_side': server_side, |
| 709 | 'do_handshake_on_connect': False, |
| 710 | } |
Benjamin Peterson | 7243b57 | 2014-11-23 17:04:34 -0600 | [diff] [blame] | 711 | if server_hostname and not server_side: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 712 | wrap_kwargs['server_hostname'] = server_hostname |
| 713 | sslsock = sslcontext.wrap_socket(rawsock, **wrap_kwargs) |
| 714 | |
| 715 | super().__init__(loop, sslsock, protocol, extra, server) |
| 716 | |
| 717 | self._server_hostname = server_hostname |
| 718 | self._waiter = waiter |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 719 | self._sslcontext = sslcontext |
| 720 | self._paused = False |
| 721 | |
| 722 | # SSL-specific extra info. (peercert is set later) |
| 723 | self._extra.update(sslcontext=sslcontext) |
| 724 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 725 | if self._loop.get_debug(): |
| 726 | logger.debug("%r starts SSL handshake", self) |
| 727 | start_time = self._loop.time() |
| 728 | else: |
| 729 | start_time = None |
| 730 | self._on_handshake(start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 731 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 732 | def _on_handshake(self, start_time): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 733 | try: |
| 734 | self._sock.do_handshake() |
| 735 | except ssl.SSLWantReadError: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 736 | self._loop.add_reader(self._sock_fd, |
| 737 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 738 | return |
| 739 | except ssl.SSLWantWriteError: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 740 | self._loop.add_writer(self._sock_fd, |
| 741 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 742 | return |
| 743 | except BaseException as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 744 | if self._loop.get_debug(): |
| 745 | logger.warning("%r: SSL handshake failed", |
| 746 | self, exc_info=True) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 747 | self._loop.remove_reader(self._sock_fd) |
| 748 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 749 | self._sock.close() |
| 750 | if self._waiter is not None: |
| 751 | self._waiter.set_exception(exc) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 752 | if isinstance(exc, Exception): |
| 753 | return |
| 754 | else: |
| 755 | raise |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 756 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 757 | self._loop.remove_reader(self._sock_fd) |
| 758 | self._loop.remove_writer(self._sock_fd) |
| 759 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 760 | peercert = self._sock.getpeercert() |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 761 | if not hasattr(self._sslcontext, 'check_hostname'): |
| 762 | # Verify hostname if requested, Python 3.4+ uses check_hostname |
| 763 | # and checks the hostname in do_handshake() |
| 764 | if (self._server_hostname and |
| 765 | self._sslcontext.verify_mode != ssl.CERT_NONE): |
| 766 | try: |
| 767 | ssl.match_hostname(peercert, self._server_hostname) |
| 768 | except Exception as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 769 | if self._loop.get_debug(): |
| 770 | logger.warning("%r: SSL handshake failed " |
| 771 | "on matching the hostname", |
| 772 | self, exc_info=True) |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 773 | self._sock.close() |
| 774 | if self._waiter is not None: |
| 775 | self._waiter.set_exception(exc) |
| 776 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 777 | |
| 778 | # Add extra info that becomes available after handshake. |
| 779 | self._extra.update(peercert=peercert, |
| 780 | cipher=self._sock.cipher(), |
| 781 | compression=self._sock.compression(), |
| 782 | ) |
| 783 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 784 | self._read_wants_write = False |
| 785 | self._write_wants_read = False |
| 786 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 787 | self._loop.call_soon(self._protocol.connection_made, self) |
| 788 | if self._waiter is not None: |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 789 | # wait until protocol.connection_made() has been called |
Victor Stinner | a9acbe8 | 2014-07-05 15:29:41 +0200 | [diff] [blame] | 790 | self._loop.call_soon(self._waiter._set_result_unless_cancelled, |
| 791 | None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 792 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 793 | if self._loop.get_debug(): |
| 794 | dt = self._loop.time() - start_time |
| 795 | logger.debug("%r: SSL handshake took %.1f ms", self, dt * 1e3) |
| 796 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 797 | def pause_reading(self): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 798 | # XXX This is a bit icky, given the comment at the top of |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 799 | # _read_ready(). Is it possible to evoke a deadlock? I don't |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 800 | # know, although it doesn't look like it; write() will still |
| 801 | # accept more data for the buffer and eventually the app will |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 802 | # call resume_reading() again, and things will flow again. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 803 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 804 | if self._closing: |
| 805 | raise RuntimeError('Cannot pause_reading() when closing') |
| 806 | if self._paused: |
| 807 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 808 | self._paused = True |
| 809 | self._loop.remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 810 | if self._loop.get_debug(): |
| 811 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 812 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 813 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 814 | if not self._paused: |
Andrew Svetlov | 3207a03 | 2014-05-27 21:24:43 +0300 | [diff] [blame] | 815 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 816 | self._paused = False |
| 817 | if self._closing: |
| 818 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 819 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 820 | if self._loop.get_debug(): |
| 821 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 822 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 823 | def _read_ready(self): |
| 824 | if self._write_wants_read: |
| 825 | self._write_wants_read = False |
| 826 | self._write_ready() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 827 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 828 | if self._buffer: |
| 829 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 830 | |
| 831 | try: |
| 832 | data = self._sock.recv(self.max_size) |
| 833 | except (BlockingIOError, InterruptedError, ssl.SSLWantReadError): |
| 834 | pass |
| 835 | except ssl.SSLWantWriteError: |
| 836 | self._read_wants_write = True |
| 837 | self._loop.remove_reader(self._sock_fd) |
| 838 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 839 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 840 | self._fatal_error(exc, 'Fatal read error on SSL transport') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 841 | else: |
| 842 | if data: |
| 843 | self._protocol.data_received(data) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 844 | else: |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 845 | try: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 846 | if self._loop.get_debug(): |
| 847 | logger.debug("%r received EOF", self) |
Guido van Rossum | 3a70392 | 2013-11-01 14:19:35 -0700 | [diff] [blame] | 848 | keep_open = self._protocol.eof_received() |
| 849 | if keep_open: |
| 850 | logger.warning('returning true from eof_received() ' |
| 851 | 'has no effect when using ssl') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 852 | finally: |
| 853 | self.close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 854 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 855 | def _write_ready(self): |
| 856 | if self._read_wants_write: |
| 857 | self._read_wants_write = False |
| 858 | self._read_ready() |
| 859 | |
| 860 | if not (self._paused or self._closing): |
| 861 | self._loop.add_reader(self._sock_fd, self._read_ready) |
| 862 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 863 | if self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 864 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 865 | n = self._sock.send(self._buffer) |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 866 | except (BlockingIOError, InterruptedError, ssl.SSLWantWriteError): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 867 | n = 0 |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 868 | except ssl.SSLWantReadError: |
| 869 | n = 0 |
| 870 | self._loop.remove_writer(self._sock_fd) |
| 871 | self._write_wants_read = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 872 | except Exception as exc: |
| 873 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 874 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 875 | self._fatal_error(exc, 'Fatal write error on SSL transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 876 | return |
| 877 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 878 | if n: |
| 879 | del self._buffer[:n] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 880 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 881 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 882 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 883 | if not self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 884 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 885 | if self._closing: |
| 886 | self._call_connection_lost(None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 887 | |
| 888 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 889 | if not isinstance(data, (bytes, bytearray, memoryview)): |
| 890 | raise TypeError('data argument must be byte-ish (%r)', |
| 891 | type(data)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 892 | if not data: |
| 893 | return |
| 894 | |
| 895 | if self._conn_lost: |
| 896 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 897 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 898 | self._conn_lost += 1 |
| 899 | return |
| 900 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 901 | if not self._buffer: |
| 902 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 903 | |
| 904 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 905 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 906 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 907 | |
| 908 | def can_write_eof(self): |
| 909 | return False |
| 910 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 911 | |
| 912 | class _SelectorDatagramTransport(_SelectorTransport): |
| 913 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 914 | _buffer_factory = collections.deque |
| 915 | |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 916 | def __init__(self, loop, sock, protocol, address=None, |
| 917 | waiter=None, extra=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 918 | super().__init__(loop, sock, protocol, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 919 | self._address = address |
| 920 | self._loop.add_reader(self._sock_fd, self._read_ready) |
| 921 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 922 | if waiter is not None: |
| 923 | # wait until protocol.connection_made() has been called |
| 924 | self._loop.call_soon(waiter._set_result_unless_cancelled, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 925 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 926 | def get_write_buffer_size(self): |
| 927 | return sum(len(data) for data, _ in self._buffer) |
| 928 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 929 | def _read_ready(self): |
| 930 | try: |
| 931 | data, addr = self._sock.recvfrom(self.max_size) |
| 932 | except (BlockingIOError, InterruptedError): |
| 933 | pass |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 934 | except OSError as exc: |
| 935 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 936 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 937 | self._fatal_error(exc, 'Fatal read error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 938 | else: |
| 939 | self._protocol.datagram_received(data, addr) |
| 940 | |
| 941 | def sendto(self, data, addr=None): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 942 | if not isinstance(data, (bytes, bytearray, memoryview)): |
| 943 | raise TypeError('data argument must be byte-ish (%r)', |
| 944 | type(data)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 945 | if not data: |
| 946 | return |
| 947 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 948 | if self._address and addr not in (None, self._address): |
| 949 | raise ValueError('Invalid address: must be None or %s' % |
| 950 | (self._address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 951 | |
| 952 | if self._conn_lost and self._address: |
| 953 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 954 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 955 | self._conn_lost += 1 |
| 956 | return |
| 957 | |
| 958 | if not self._buffer: |
| 959 | # Attempt to send it right away first. |
| 960 | try: |
| 961 | if self._address: |
| 962 | self._sock.send(data) |
| 963 | else: |
| 964 | self._sock.sendto(data, addr) |
| 965 | return |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 966 | except (BlockingIOError, InterruptedError): |
| 967 | self._loop.add_writer(self._sock_fd, self._sendto_ready) |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 968 | except OSError as exc: |
| 969 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 970 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 971 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 972 | self._fatal_error(exc, |
| 973 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 974 | return |
| 975 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 976 | # Ensure that what we buffer is immutable. |
| 977 | self._buffer.append((bytes(data), addr)) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 978 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 979 | |
| 980 | def _sendto_ready(self): |
| 981 | while self._buffer: |
| 982 | data, addr = self._buffer.popleft() |
| 983 | try: |
| 984 | if self._address: |
| 985 | self._sock.send(data) |
| 986 | else: |
| 987 | self._sock.sendto(data, addr) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 988 | except (BlockingIOError, InterruptedError): |
| 989 | self._buffer.appendleft((data, addr)) # Try again later. |
| 990 | break |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 991 | except OSError as exc: |
| 992 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 993 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 994 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 995 | self._fatal_error(exc, |
| 996 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 997 | return |
| 998 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 999 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1000 | if not self._buffer: |
| 1001 | self._loop.remove_writer(self._sock_fd) |
| 1002 | if self._closing: |
| 1003 | self._call_connection_lost(None) |