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 |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 13 | import warnings |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 14 | import weakref |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 15 | try: |
| 16 | import ssl |
| 17 | except ImportError: # pragma: no cover |
| 18 | ssl = None |
| 19 | |
| 20 | from . import base_events |
Yury Selivanov | 2a8911c | 2015-08-04 15:56:33 -0400 | [diff] [blame] | 21 | from . import compat |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 22 | from . import constants |
| 23 | from . import events |
| 24 | from . import futures |
| 25 | from . import selectors |
| 26 | from . import transports |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 27 | from . import sslproto |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 28 | from .coroutines import coroutine |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 29 | from .log import logger |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 30 | |
| 31 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 32 | def _test_selector_event(selector, fd, event): |
| 33 | # Test if the selector is monitoring 'event' events |
| 34 | # for the file descriptor 'fd'. |
| 35 | try: |
| 36 | key = selector.get_key(fd) |
| 37 | except KeyError: |
| 38 | return False |
| 39 | else: |
| 40 | return bool(key.events & event) |
| 41 | |
| 42 | |
Yury Selivanov | 44c19ec | 2016-09-11 21:39:31 -0400 | [diff] [blame] | 43 | if hasattr(socket, 'TCP_NODELAY'): |
| 44 | def _set_nodelay(sock): |
| 45 | if (sock.family in {socket.AF_INET, socket.AF_INET6} and |
| 46 | sock.type == socket.SOCK_STREAM and |
| 47 | sock.proto == socket.IPPROTO_TCP): |
| 48 | sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1) |
| 49 | else: |
| 50 | def _set_nodelay(sock): |
| 51 | pass |
| 52 | |
| 53 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 54 | class BaseSelectorEventLoop(base_events.BaseEventLoop): |
| 55 | """Selector event loop. |
| 56 | |
| 57 | See events.EventLoop for API specification. |
| 58 | """ |
| 59 | |
| 60 | def __init__(self, selector=None): |
| 61 | super().__init__() |
| 62 | |
| 63 | if selector is None: |
| 64 | selector = selectors.DefaultSelector() |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 65 | logger.debug('Using selector: %s', selector.__class__.__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 66 | self._selector = selector |
| 67 | self._make_self_pipe() |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 68 | self._transports = weakref.WeakValueDictionary() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 69 | |
| 70 | def _make_socket_transport(self, sock, protocol, waiter=None, *, |
| 71 | extra=None, server=None): |
| 72 | return _SelectorSocketTransport(self, sock, protocol, waiter, |
| 73 | extra, server) |
| 74 | |
Victor Stinner | 15cc678 | 2015-01-09 00:09:10 +0100 | [diff] [blame] | 75 | def _make_ssl_transport(self, rawsock, protocol, sslcontext, waiter=None, |
| 76 | *, server_side=False, server_hostname=None, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 77 | extra=None, server=None): |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 78 | if not sslproto._is_sslproto_available(): |
| 79 | return self._make_legacy_ssl_transport( |
| 80 | rawsock, protocol, sslcontext, waiter, |
| 81 | server_side=server_side, server_hostname=server_hostname, |
| 82 | extra=extra, server=server) |
| 83 | |
| 84 | ssl_protocol = sslproto.SSLProtocol(self, protocol, sslcontext, waiter, |
| 85 | server_side, server_hostname) |
| 86 | _SelectorSocketTransport(self, rawsock, ssl_protocol, |
| 87 | extra=extra, server=server) |
| 88 | return ssl_protocol._app_transport |
| 89 | |
| 90 | def _make_legacy_ssl_transport(self, rawsock, protocol, sslcontext, |
| 91 | waiter, *, |
| 92 | server_side=False, server_hostname=None, |
| 93 | extra=None, server=None): |
| 94 | # Use the legacy API: SSL_write, SSL_read, etc. The legacy API is used |
| 95 | # on Python 3.4 and older, when ssl.MemoryBIO is not available. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 96 | return _SelectorSslTransport( |
| 97 | self, rawsock, protocol, sslcontext, waiter, |
| 98 | server_side, server_hostname, extra, server) |
| 99 | |
| 100 | def _make_datagram_transport(self, sock, protocol, |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 101 | address=None, waiter=None, extra=None): |
| 102 | return _SelectorDatagramTransport(self, sock, protocol, |
| 103 | address, waiter, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 104 | |
| 105 | def close(self): |
Victor Stinner | 956de69 | 2014-12-26 21:07:52 +0100 | [diff] [blame] | 106 | if self.is_running(): |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 107 | raise RuntimeError("Cannot close a running event loop") |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 108 | if self.is_closed(): |
| 109 | return |
| 110 | self._close_self_pipe() |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 111 | super().close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 112 | if self._selector is not None: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 113 | self._selector.close() |
| 114 | self._selector = None |
| 115 | |
| 116 | def _socketpair(self): |
| 117 | raise NotImplementedError |
| 118 | |
| 119 | def _close_self_pipe(self): |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 120 | self._remove_reader(self._ssock.fileno()) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 121 | self._ssock.close() |
| 122 | self._ssock = None |
| 123 | self._csock.close() |
| 124 | self._csock = None |
| 125 | self._internal_fds -= 1 |
| 126 | |
| 127 | def _make_self_pipe(self): |
| 128 | # A self-socket, really. :-) |
| 129 | self._ssock, self._csock = self._socketpair() |
| 130 | self._ssock.setblocking(False) |
| 131 | self._csock.setblocking(False) |
| 132 | self._internal_fds += 1 |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 133 | self._add_reader(self._ssock.fileno(), self._read_from_self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 134 | |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 135 | def _process_self_data(self, data): |
| 136 | pass |
| 137 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 138 | def _read_from_self(self): |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 139 | while True: |
| 140 | try: |
| 141 | data = self._ssock.recv(4096) |
| 142 | if not data: |
| 143 | break |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 144 | self._process_self_data(data) |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 145 | except InterruptedError: |
| 146 | continue |
| 147 | except BlockingIOError: |
| 148 | break |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 149 | |
| 150 | def _write_to_self(self): |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 151 | # This may be called from a different thread, possibly after |
| 152 | # _close_self_pipe() has been called or even while it is |
| 153 | # running. Guard for self._csock being None or closed. When |
| 154 | # a socket is closed, send() raises OSError (with errno set to |
| 155 | # EBADF, but let's not rely on the exact error code). |
| 156 | csock = self._csock |
| 157 | if csock is not None: |
| 158 | try: |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 159 | csock.send(b'\0') |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 160 | except OSError: |
Victor Stinner | 65dd69a | 2014-07-25 22:36:05 +0200 | [diff] [blame] | 161 | if self._debug: |
| 162 | logger.debug("Fail to write a null byte into the " |
| 163 | "self-pipe socket", |
| 164 | exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 165 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 166 | def _start_serving(self, protocol_factory, sock, |
Yury Selivanov | a1b0e7d | 2016-09-15 14:13:15 -0400 | [diff] [blame] | 167 | sslcontext=None, server=None, backlog=100): |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 168 | self._add_reader(sock.fileno(), self._accept_connection, |
| 169 | protocol_factory, sock, sslcontext, server, backlog) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 170 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 171 | def _accept_connection(self, protocol_factory, sock, |
Yury Selivanov | a1b0e7d | 2016-09-15 14:13:15 -0400 | [diff] [blame] | 172 | sslcontext=None, server=None, backlog=100): |
| 173 | # This method is only called once for each event loop tick where the |
| 174 | # listening socket has triggered an EVENT_READ. There may be multiple |
| 175 | # connections waiting for an .accept() so it is called in a loop. |
| 176 | # See https://bugs.python.org/issue27906 for more details. |
| 177 | for _ in range(backlog): |
| 178 | try: |
| 179 | conn, addr = sock.accept() |
| 180 | if self._debug: |
| 181 | logger.debug("%r got a new connection from %r: %r", |
| 182 | server, addr, conn) |
| 183 | conn.setblocking(False) |
| 184 | except (BlockingIOError, InterruptedError, ConnectionAbortedError): |
| 185 | # Early exit because the socket accept buffer is empty. |
| 186 | return None |
| 187 | except OSError as exc: |
| 188 | # There's nowhere to send the error, so just log it. |
| 189 | if exc.errno in (errno.EMFILE, errno.ENFILE, |
| 190 | errno.ENOBUFS, errno.ENOMEM): |
| 191 | # Some platforms (e.g. Linux keep reporting the FD as |
| 192 | # ready, so we remove the read handler temporarily. |
| 193 | # We'll try again in a while. |
| 194 | self.call_exception_handler({ |
| 195 | 'message': 'socket.accept() out of system resource', |
| 196 | 'exception': exc, |
| 197 | 'socket': sock, |
| 198 | }) |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 199 | self._remove_reader(sock.fileno()) |
Yury Selivanov | a1b0e7d | 2016-09-15 14:13:15 -0400 | [diff] [blame] | 200 | self.call_later(constants.ACCEPT_RETRY_DELAY, |
| 201 | self._start_serving, |
| 202 | protocol_factory, sock, sslcontext, server, |
| 203 | backlog) |
| 204 | else: |
| 205 | raise # The event loop will catch, log and ignore it. |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 206 | else: |
Yury Selivanov | a1b0e7d | 2016-09-15 14:13:15 -0400 | [diff] [blame] | 207 | extra = {'peername': addr} |
| 208 | accept = self._accept_connection2(protocol_factory, conn, extra, |
| 209 | sslcontext, server) |
| 210 | self.create_task(accept) |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 211 | |
| 212 | @coroutine |
| 213 | def _accept_connection2(self, protocol_factory, conn, extra, |
| 214 | sslcontext=None, server=None): |
| 215 | protocol = None |
| 216 | transport = None |
| 217 | try: |
Victor Stinner | 29ad011 | 2015-01-15 00:04:21 +0100 | [diff] [blame] | 218 | protocol = protocol_factory() |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 219 | waiter = self.create_future() |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 220 | if sslcontext: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 221 | transport = self._make_ssl_transport( |
| 222 | conn, protocol, sslcontext, waiter=waiter, |
| 223 | server_side=True, extra=extra, server=server) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 224 | else: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 225 | transport = self._make_socket_transport( |
| 226 | conn, protocol, waiter=waiter, extra=extra, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 227 | server=server) |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 228 | |
| 229 | try: |
| 230 | yield from waiter |
| 231 | except: |
| 232 | transport.close() |
| 233 | raise |
| 234 | |
| 235 | # It's now up to the protocol to handle the connection. |
| 236 | except Exception as exc: |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 237 | if self._debug: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 238 | context = { |
| 239 | 'message': ('Error on transport creation ' |
| 240 | 'for incoming connection'), |
| 241 | 'exception': exc, |
| 242 | } |
| 243 | if protocol is not None: |
| 244 | context['protocol'] = protocol |
| 245 | if transport is not None: |
| 246 | context['transport'] = transport |
| 247 | self.call_exception_handler(context) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 248 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 249 | def _ensure_fd_no_transport(self, fd): |
| 250 | try: |
| 251 | transport = self._transports[fd] |
| 252 | except KeyError: |
| 253 | pass |
| 254 | else: |
| 255 | if not transport.is_closing(): |
| 256 | raise RuntimeError( |
| 257 | 'File descriptor {!r} is used by transport {!r}'.format( |
| 258 | fd, transport)) |
| 259 | |
| 260 | def _add_reader(self, fd, callback, *args): |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 261 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 262 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 263 | try: |
| 264 | key = self._selector.get_key(fd) |
| 265 | except KeyError: |
| 266 | self._selector.register(fd, selectors.EVENT_READ, |
| 267 | (handle, None)) |
| 268 | else: |
| 269 | mask, (reader, writer) = key.events, key.data |
| 270 | self._selector.modify(fd, mask | selectors.EVENT_READ, |
| 271 | (handle, writer)) |
| 272 | if reader is not None: |
| 273 | reader.cancel() |
| 274 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 275 | def _remove_reader(self, fd): |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 276 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 277 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 278 | try: |
| 279 | key = self._selector.get_key(fd) |
| 280 | except KeyError: |
| 281 | return False |
| 282 | else: |
| 283 | mask, (reader, writer) = key.events, key.data |
| 284 | mask &= ~selectors.EVENT_READ |
| 285 | if not mask: |
| 286 | self._selector.unregister(fd) |
| 287 | else: |
| 288 | self._selector.modify(fd, mask, (None, writer)) |
| 289 | |
| 290 | if reader is not None: |
| 291 | reader.cancel() |
| 292 | return True |
| 293 | else: |
| 294 | return False |
| 295 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 296 | def _add_writer(self, fd, callback, *args): |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 297 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 298 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 299 | try: |
| 300 | key = self._selector.get_key(fd) |
| 301 | except KeyError: |
| 302 | self._selector.register(fd, selectors.EVENT_WRITE, |
| 303 | (None, handle)) |
| 304 | else: |
| 305 | mask, (reader, writer) = key.events, key.data |
| 306 | self._selector.modify(fd, mask | selectors.EVENT_WRITE, |
| 307 | (reader, handle)) |
| 308 | if writer is not None: |
| 309 | writer.cancel() |
| 310 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 311 | def _remove_writer(self, fd): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 312 | """Remove a writer callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 313 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 314 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 315 | try: |
| 316 | key = self._selector.get_key(fd) |
| 317 | except KeyError: |
| 318 | return False |
| 319 | else: |
| 320 | mask, (reader, writer) = key.events, key.data |
| 321 | # Remove both writer and connector. |
| 322 | mask &= ~selectors.EVENT_WRITE |
| 323 | if not mask: |
| 324 | self._selector.unregister(fd) |
| 325 | else: |
| 326 | self._selector.modify(fd, mask, (reader, None)) |
| 327 | |
| 328 | if writer is not None: |
| 329 | writer.cancel() |
| 330 | return True |
| 331 | else: |
| 332 | return False |
| 333 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 334 | def add_reader(self, fd, callback, *args): |
| 335 | """Add a reader callback.""" |
| 336 | self._ensure_fd_no_transport(fd) |
| 337 | return self._add_reader(fd, callback, *args) |
| 338 | |
| 339 | def remove_reader(self, fd): |
| 340 | """Remove a reader callback.""" |
| 341 | self._ensure_fd_no_transport(fd) |
| 342 | return self._remove_reader(fd) |
| 343 | |
| 344 | def add_writer(self, fd, callback, *args): |
| 345 | """Add a writer callback..""" |
| 346 | self._ensure_fd_no_transport(fd) |
| 347 | return self._add_writer(fd, callback, *args) |
| 348 | |
| 349 | def remove_writer(self, fd): |
| 350 | """Remove a writer callback.""" |
| 351 | self._ensure_fd_no_transport(fd) |
| 352 | return self._remove_writer(fd) |
| 353 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 354 | def sock_recv(self, sock, n): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 355 | """Receive data from the socket. |
| 356 | |
| 357 | The return value is a bytes object representing the data received. |
| 358 | The maximum amount of data to be received at once is specified by |
| 359 | nbytes. |
| 360 | |
| 361 | This method is a coroutine. |
| 362 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 363 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 364 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 365 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 366 | self._sock_recv(fut, False, sock, n) |
| 367 | return fut |
| 368 | |
| 369 | def _sock_recv(self, fut, registered, sock, n): |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 370 | # _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] | 371 | # be done immediately. Don't use it directly, call sock_recv(). |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 372 | fd = sock.fileno() |
| 373 | if registered: |
| 374 | # Remove the callback early. It should be rare that the |
| 375 | # selector says the fd is ready but the call still returns |
| 376 | # EAGAIN, and I am willing to take a hit in that case in |
| 377 | # order to simplify the common case. |
| 378 | self.remove_reader(fd) |
| 379 | if fut.cancelled(): |
| 380 | return |
| 381 | try: |
| 382 | data = sock.recv(n) |
| 383 | except (BlockingIOError, InterruptedError): |
| 384 | self.add_reader(fd, self._sock_recv, fut, True, sock, n) |
| 385 | except Exception as exc: |
| 386 | fut.set_exception(exc) |
| 387 | else: |
| 388 | fut.set_result(data) |
| 389 | |
| 390 | def sock_sendall(self, sock, data): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 391 | """Send data to the socket. |
| 392 | |
| 393 | The socket must be connected to a remote socket. This method continues |
| 394 | to send data from data until either all data has been sent or an |
| 395 | error occurs. None is returned on success. On error, an exception is |
| 396 | raised, and there is no way to determine how much data, if any, was |
| 397 | successfully processed by the receiving end of the connection. |
| 398 | |
| 399 | This method is a coroutine. |
| 400 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 401 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 402 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 403 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 404 | if data: |
| 405 | self._sock_sendall(fut, False, sock, data) |
| 406 | else: |
| 407 | fut.set_result(None) |
| 408 | return fut |
| 409 | |
| 410 | def _sock_sendall(self, fut, registered, sock, data): |
| 411 | fd = sock.fileno() |
| 412 | |
| 413 | if registered: |
| 414 | self.remove_writer(fd) |
| 415 | if fut.cancelled(): |
| 416 | return |
| 417 | |
| 418 | try: |
| 419 | n = sock.send(data) |
| 420 | except (BlockingIOError, InterruptedError): |
| 421 | n = 0 |
| 422 | except Exception as exc: |
| 423 | fut.set_exception(exc) |
| 424 | return |
| 425 | |
| 426 | if n == len(data): |
| 427 | fut.set_result(None) |
| 428 | else: |
| 429 | if n: |
| 430 | data = data[n:] |
| 431 | self.add_writer(fd, self._sock_sendall, fut, True, sock, data) |
| 432 | |
Yury Selivanov | d6c6771 | 2016-09-15 17:56:36 -0400 | [diff] [blame] | 433 | @coroutine |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 434 | def sock_connect(self, sock, address): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 435 | """Connect to a remote socket at address. |
| 436 | |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 437 | This method is a coroutine. |
| 438 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 439 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 440 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 441 | |
Yury Selivanov | d6c6771 | 2016-09-15 17:56:36 -0400 | [diff] [blame] | 442 | if not hasattr(socket, 'AF_UNIX') or sock.family != socket.AF_UNIX: |
Yury Selivanov | 63bf487 | 2016-06-28 11:00:22 -0400 | [diff] [blame] | 443 | resolved = base_events._ensure_resolved( |
| 444 | address, family=sock.family, proto=sock.proto, loop=self) |
Yury Selivanov | d6c6771 | 2016-09-15 17:56:36 -0400 | [diff] [blame] | 445 | if not resolved.done(): |
| 446 | yield from resolved |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 447 | _, _, _, _, address = resolved.result()[0] |
Yury Selivanov | d6c6771 | 2016-09-15 17:56:36 -0400 | [diff] [blame] | 448 | |
| 449 | fut = self.create_future() |
| 450 | self._sock_connect(fut, sock, address) |
| 451 | return (yield from fut) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 452 | |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 453 | def _sock_connect(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 454 | fd = sock.fileno() |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 455 | try: |
Victor Stinner | c9d11c3 | 2015-04-07 21:38:04 +0200 | [diff] [blame] | 456 | sock.connect(address) |
| 457 | except (BlockingIOError, InterruptedError): |
| 458 | # Issue #23618: When the C function connect() fails with EINTR, the |
| 459 | # connection runs in background. We have to wait until the socket |
| 460 | # becomes writable to be notified when the connection succeed or |
| 461 | # fails. |
Yury Selivanov | d6c6771 | 2016-09-15 17:56:36 -0400 | [diff] [blame] | 462 | fut.add_done_callback( |
| 463 | functools.partial(self._sock_connect_done, fd)) |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 464 | self.add_writer(fd, self._sock_connect_cb, fut, sock, address) |
| 465 | except Exception as exc: |
| 466 | fut.set_exception(exc) |
| 467 | else: |
| 468 | fut.set_result(None) |
| 469 | |
Victor Stinner | 3531d90 | 2015-01-09 01:42:52 +0100 | [diff] [blame] | 470 | def _sock_connect_done(self, fd, fut): |
| 471 | self.remove_writer(fd) |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 472 | |
| 473 | def _sock_connect_cb(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 474 | if fut.cancelled(): |
| 475 | return |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 476 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 477 | try: |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 478 | err = sock.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR) |
| 479 | if err != 0: |
| 480 | # Jump to any except clause below. |
| 481 | raise OSError(err, 'Connect call failed %s' % (address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 482 | except (BlockingIOError, InterruptedError): |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 483 | # socket is still registered, the callback will be retried later |
| 484 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 485 | except Exception as exc: |
| 486 | fut.set_exception(exc) |
| 487 | else: |
| 488 | fut.set_result(None) |
| 489 | |
| 490 | def sock_accept(self, sock): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 491 | """Accept a connection. |
| 492 | |
| 493 | The socket must be bound to an address and listening for connections. |
| 494 | The return value is a pair (conn, address) where conn is a new socket |
| 495 | object usable to send and receive data on the connection, and address |
| 496 | is the address bound to the socket on the other end of the connection. |
| 497 | |
| 498 | This method is a coroutine. |
| 499 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 500 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 501 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 502 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 503 | self._sock_accept(fut, False, sock) |
| 504 | return fut |
| 505 | |
| 506 | def _sock_accept(self, fut, registered, sock): |
| 507 | fd = sock.fileno() |
| 508 | if registered: |
| 509 | self.remove_reader(fd) |
| 510 | if fut.cancelled(): |
| 511 | return |
| 512 | try: |
| 513 | conn, address = sock.accept() |
| 514 | conn.setblocking(False) |
| 515 | except (BlockingIOError, InterruptedError): |
| 516 | self.add_reader(fd, self._sock_accept, fut, True, sock) |
| 517 | except Exception as exc: |
| 518 | fut.set_exception(exc) |
| 519 | else: |
| 520 | fut.set_result((conn, address)) |
| 521 | |
| 522 | def _process_events(self, event_list): |
| 523 | for key, mask in event_list: |
| 524 | fileobj, (reader, writer) = key.fileobj, key.data |
| 525 | if mask & selectors.EVENT_READ and reader is not None: |
| 526 | if reader._cancelled: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 527 | self._remove_reader(fileobj) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 528 | else: |
| 529 | self._add_callback(reader) |
| 530 | if mask & selectors.EVENT_WRITE and writer is not None: |
| 531 | if writer._cancelled: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 532 | self._remove_writer(fileobj) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 533 | else: |
| 534 | self._add_callback(writer) |
| 535 | |
| 536 | def _stop_serving(self, sock): |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 537 | self._remove_reader(sock.fileno()) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 538 | sock.close() |
| 539 | |
| 540 | |
Yury Selivanov | c098241 | 2014-02-18 18:41:13 -0500 | [diff] [blame] | 541 | class _SelectorTransport(transports._FlowControlMixin, |
| 542 | transports.Transport): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 543 | |
| 544 | max_size = 256 * 1024 # Buffer size passed to recv(). |
| 545 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 546 | _buffer_factory = bytearray # Constructs initial value for self._buffer. |
| 547 | |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 548 | # Attribute used in the destructor: it must be set even if the constructor |
| 549 | # is not called (see _SelectorSslTransport which may start by raising an |
| 550 | # exception) |
| 551 | _sock = None |
| 552 | |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 553 | def __init__(self, loop, sock, protocol, extra=None, server=None): |
Victor Stinner | 004adb9 | 2014-11-05 15:27:41 +0100 | [diff] [blame] | 554 | super().__init__(extra, loop) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 555 | self._extra['socket'] = sock |
| 556 | self._extra['sockname'] = sock.getsockname() |
| 557 | if 'peername' not in self._extra: |
| 558 | try: |
| 559 | self._extra['peername'] = sock.getpeername() |
| 560 | except socket.error: |
| 561 | self._extra['peername'] = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 562 | self._sock = sock |
| 563 | self._sock_fd = sock.fileno() |
| 564 | self._protocol = protocol |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 565 | self._protocol_connected = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 566 | self._server = server |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 567 | self._buffer = self._buffer_factory() |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 568 | self._conn_lost = 0 # Set when call to connection_lost scheduled. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 569 | self._closing = False # Set when close() called. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 570 | if self._server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 571 | self._server._attach() |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 572 | loop._transports[self._sock_fd] = self |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 573 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 574 | def __repr__(self): |
Victor Stinner | 0e34dc3 | 2014-10-12 09:52:11 +0200 | [diff] [blame] | 575 | info = [self.__class__.__name__] |
| 576 | if self._sock is None: |
| 577 | info.append('closed') |
| 578 | elif self._closing: |
| 579 | info.append('closing') |
| 580 | info.append('fd=%s' % self._sock_fd) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 581 | # test if the transport was closed |
Victor Stinner | 79fd962 | 2015-03-27 15:20:08 +0100 | [diff] [blame] | 582 | if self._loop is not None and not self._loop.is_closed(): |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 583 | polling = _test_selector_event(self._loop._selector, |
| 584 | self._sock_fd, selectors.EVENT_READ) |
| 585 | if polling: |
| 586 | info.append('read=polling') |
| 587 | else: |
| 588 | info.append('read=idle') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 589 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 590 | polling = _test_selector_event(self._loop._selector, |
Victor Stinner | 15cc678 | 2015-01-09 00:09:10 +0100 | [diff] [blame] | 591 | self._sock_fd, |
| 592 | selectors.EVENT_WRITE) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 593 | if polling: |
| 594 | state = 'polling' |
| 595 | else: |
| 596 | state = 'idle' |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 597 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 598 | bufsize = self.get_write_buffer_size() |
| 599 | info.append('write=<%s, bufsize=%s>' % (state, bufsize)) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 600 | return '<%s>' % ' '.join(info) |
| 601 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 602 | def abort(self): |
| 603 | self._force_close(None) |
| 604 | |
Yury Selivanov | a05a6ef | 2016-09-11 21:11:02 -0400 | [diff] [blame] | 605 | def set_protocol(self, protocol): |
| 606 | self._protocol = protocol |
| 607 | |
| 608 | def get_protocol(self): |
| 609 | return self._protocol |
| 610 | |
Yury Selivanov | 5bb1afb | 2015-11-16 12:43:21 -0500 | [diff] [blame] | 611 | def is_closing(self): |
| 612 | return self._closing |
| 613 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 614 | def close(self): |
| 615 | if self._closing: |
| 616 | return |
| 617 | self._closing = True |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 618 | self._loop._remove_reader(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 619 | if not self._buffer: |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 620 | self._conn_lost += 1 |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 621 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 622 | self._loop.call_soon(self._call_connection_lost, None) |
| 623 | |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 624 | # On Python 3.3 and older, objects with a destructor part of a reference |
| 625 | # cycle are never destroyed. It's not more the case on Python 3.4 thanks |
| 626 | # to the PEP 442. |
Yury Selivanov | 2a8911c | 2015-08-04 15:56:33 -0400 | [diff] [blame] | 627 | if compat.PY34: |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 628 | def __del__(self): |
| 629 | if self._sock is not None: |
Victor Stinner | e19558a | 2016-03-23 00:28:08 +0100 | [diff] [blame] | 630 | warnings.warn("unclosed transport %r" % self, ResourceWarning, |
| 631 | source=self) |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 632 | self._sock.close() |
| 633 | |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 634 | def _fatal_error(self, exc, message='Fatal error on transport'): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 635 | # Should be called from exception handler only. |
Victor Stinner | c94a93a | 2016-04-01 21:43:39 +0200 | [diff] [blame] | 636 | if isinstance(exc, base_events._FATAL_ERROR_IGNORE): |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 637 | if self._loop.get_debug(): |
| 638 | logger.debug("%r: %s", self, message, exc_info=True) |
| 639 | else: |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 640 | self._loop.call_exception_handler({ |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 641 | 'message': message, |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 642 | 'exception': exc, |
| 643 | 'transport': self, |
| 644 | 'protocol': self._protocol, |
| 645 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 646 | self._force_close(exc) |
| 647 | |
| 648 | def _force_close(self, exc): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 649 | if self._conn_lost: |
| 650 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 651 | if self._buffer: |
| 652 | self._buffer.clear() |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 653 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 654 | if not self._closing: |
| 655 | self._closing = True |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 656 | self._loop._remove_reader(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 657 | self._conn_lost += 1 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 658 | self._loop.call_soon(self._call_connection_lost, exc) |
| 659 | |
| 660 | def _call_connection_lost(self, exc): |
| 661 | try: |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 662 | if self._protocol_connected: |
| 663 | self._protocol.connection_lost(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 664 | finally: |
| 665 | self._sock.close() |
| 666 | self._sock = None |
| 667 | self._protocol = None |
| 668 | self._loop = None |
| 669 | server = self._server |
| 670 | if server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 671 | server._detach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 672 | self._server = None |
| 673 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 674 | def get_write_buffer_size(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 675 | return len(self._buffer) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 676 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 677 | |
| 678 | class _SelectorSocketTransport(_SelectorTransport): |
| 679 | |
| 680 | def __init__(self, loop, sock, protocol, waiter=None, |
| 681 | extra=None, server=None): |
| 682 | super().__init__(loop, sock, protocol, extra, server) |
| 683 | self._eof = False |
| 684 | self._paused = False |
| 685 | |
Yury Selivanov | 44c19ec | 2016-09-11 21:39:31 -0400 | [diff] [blame] | 686 | # Disable the Nagle algorithm -- small writes will be |
| 687 | # sent without waiting for the TCP ACK. This generally |
| 688 | # decreases the latency (in some cases significantly.) |
| 689 | _set_nodelay(self._sock) |
| 690 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 691 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | fa73779 | 2015-01-29 00:36:51 +0100 | [diff] [blame] | 692 | # only start reading when connection_made() has been called |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 693 | self._loop.call_soon(self._loop._add_reader, |
Victor Stinner | fa73779 | 2015-01-29 00:36:51 +0100 | [diff] [blame] | 694 | self._sock_fd, self._read_ready) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 695 | if waiter is not None: |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 696 | # only wake up the waiter when connection_made() has been called |
Yury Selivanov | 5d7e3b6 | 2015-11-17 12:19:41 -0500 | [diff] [blame] | 697 | self._loop.call_soon(futures._set_result_unless_cancelled, |
| 698 | waiter, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 699 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 700 | def pause_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 701 | if self._closing: |
| 702 | raise RuntimeError('Cannot pause_reading() when closing') |
| 703 | if self._paused: |
| 704 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 705 | self._paused = True |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 706 | self._loop._remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 707 | if self._loop.get_debug(): |
| 708 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 709 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 710 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 711 | if not self._paused: |
| 712 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 713 | self._paused = False |
| 714 | if self._closing: |
| 715 | return |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 716 | self._loop._add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 717 | if self._loop.get_debug(): |
| 718 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 719 | |
| 720 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 721 | if self._conn_lost: |
| 722 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 723 | try: |
| 724 | data = self._sock.recv(self.max_size) |
| 725 | except (BlockingIOError, InterruptedError): |
| 726 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 727 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 728 | self._fatal_error(exc, 'Fatal read error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 729 | else: |
| 730 | if data: |
| 731 | self._protocol.data_received(data) |
| 732 | else: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 733 | if self._loop.get_debug(): |
| 734 | logger.debug("%r received EOF", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 735 | keep_open = self._protocol.eof_received() |
Guido van Rossum | 1f683bb | 2013-10-30 14:36:58 -0700 | [diff] [blame] | 736 | if keep_open: |
| 737 | # We're keeping the connection open so the |
| 738 | # protocol can write more, but we still can't |
| 739 | # receive more, so remove the reader callback. |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 740 | self._loop._remove_reader(self._sock_fd) |
Guido van Rossum | 1f683bb | 2013-10-30 14:36:58 -0700 | [diff] [blame] | 741 | else: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 742 | self.close() |
| 743 | |
| 744 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 745 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 746 | raise TypeError('data argument must be a bytes-like object, ' |
| 747 | 'not %r' % type(data).__name__) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 748 | if self._eof: |
| 749 | raise RuntimeError('Cannot call write() after write_eof()') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 750 | if not data: |
| 751 | return |
| 752 | |
| 753 | if self._conn_lost: |
| 754 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 755 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 756 | self._conn_lost += 1 |
| 757 | return |
| 758 | |
| 759 | if not self._buffer: |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 760 | # Optimization: try to send now. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 761 | try: |
| 762 | n = self._sock.send(data) |
| 763 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 764 | pass |
| 765 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 766 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 767 | return |
| 768 | else: |
| 769 | data = data[n:] |
| 770 | if not data: |
| 771 | return |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 772 | # Not all was written; register write handler. |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 773 | self._loop._add_writer(self._sock_fd, self._write_ready) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 774 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 775 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 776 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 777 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 778 | |
| 779 | def _write_ready(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 780 | assert self._buffer, 'Data should not be empty' |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 781 | |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 782 | if self._conn_lost: |
| 783 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 784 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 785 | n = self._sock.send(self._buffer) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 786 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 787 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 788 | except Exception as exc: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 789 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 790 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 791 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 792 | else: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 793 | if n: |
| 794 | del self._buffer[:n] |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 795 | self._maybe_resume_protocol() # May append to buffer. |
| 796 | if not self._buffer: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 797 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 798 | if self._closing: |
| 799 | self._call_connection_lost(None) |
| 800 | elif self._eof: |
| 801 | self._sock.shutdown(socket.SHUT_WR) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 802 | |
| 803 | def write_eof(self): |
| 804 | if self._eof: |
| 805 | return |
| 806 | self._eof = True |
| 807 | if not self._buffer: |
| 808 | self._sock.shutdown(socket.SHUT_WR) |
| 809 | |
| 810 | def can_write_eof(self): |
| 811 | return True |
| 812 | |
| 813 | |
| 814 | class _SelectorSslTransport(_SelectorTransport): |
| 815 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 816 | _buffer_factory = bytearray |
| 817 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 818 | def __init__(self, loop, rawsock, protocol, sslcontext, waiter=None, |
| 819 | server_side=False, server_hostname=None, |
| 820 | extra=None, server=None): |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 821 | if ssl is None: |
| 822 | raise RuntimeError('stdlib ssl module not available') |
| 823 | |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 824 | if not sslcontext: |
| 825 | sslcontext = sslproto._create_transport_context(server_side, server_hostname) |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 826 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 827 | wrap_kwargs = { |
| 828 | 'server_side': server_side, |
| 829 | 'do_handshake_on_connect': False, |
| 830 | } |
Benjamin Peterson | 7243b57 | 2014-11-23 17:04:34 -0600 | [diff] [blame] | 831 | if server_hostname and not server_side: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 832 | wrap_kwargs['server_hostname'] = server_hostname |
| 833 | sslsock = sslcontext.wrap_socket(rawsock, **wrap_kwargs) |
| 834 | |
| 835 | super().__init__(loop, sslsock, protocol, extra, server) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 836 | # the protocol connection is only made after the SSL handshake |
| 837 | self._protocol_connected = False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 838 | |
| 839 | self._server_hostname = server_hostname |
| 840 | self._waiter = waiter |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 841 | self._sslcontext = sslcontext |
| 842 | self._paused = False |
| 843 | |
| 844 | # SSL-specific extra info. (peercert is set later) |
| 845 | self._extra.update(sslcontext=sslcontext) |
| 846 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 847 | if self._loop.get_debug(): |
| 848 | logger.debug("%r starts SSL handshake", self) |
| 849 | start_time = self._loop.time() |
| 850 | else: |
| 851 | start_time = None |
| 852 | self._on_handshake(start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 853 | |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 854 | def _wakeup_waiter(self, exc=None): |
| 855 | if self._waiter is None: |
| 856 | return |
| 857 | if not self._waiter.cancelled(): |
| 858 | if exc is not None: |
| 859 | self._waiter.set_exception(exc) |
| 860 | else: |
| 861 | self._waiter.set_result(None) |
| 862 | self._waiter = None |
| 863 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 864 | def _on_handshake(self, start_time): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 865 | try: |
| 866 | self._sock.do_handshake() |
| 867 | except ssl.SSLWantReadError: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 868 | self._loop._add_reader(self._sock_fd, |
| 869 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 870 | return |
| 871 | except ssl.SSLWantWriteError: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 872 | self._loop._add_writer(self._sock_fd, |
| 873 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 874 | return |
| 875 | except BaseException as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 876 | if self._loop.get_debug(): |
| 877 | logger.warning("%r: SSL handshake failed", |
| 878 | self, exc_info=True) |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 879 | self._loop._remove_reader(self._sock_fd) |
| 880 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 881 | self._sock.close() |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 882 | self._wakeup_waiter(exc) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 883 | if isinstance(exc, Exception): |
| 884 | return |
| 885 | else: |
| 886 | raise |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 887 | |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 888 | self._loop._remove_reader(self._sock_fd) |
| 889 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 890 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 891 | peercert = self._sock.getpeercert() |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 892 | if not hasattr(self._sslcontext, 'check_hostname'): |
| 893 | # Verify hostname if requested, Python 3.4+ uses check_hostname |
| 894 | # and checks the hostname in do_handshake() |
| 895 | if (self._server_hostname and |
| 896 | self._sslcontext.verify_mode != ssl.CERT_NONE): |
| 897 | try: |
| 898 | ssl.match_hostname(peercert, self._server_hostname) |
| 899 | except Exception as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 900 | if self._loop.get_debug(): |
| 901 | logger.warning("%r: SSL handshake failed " |
| 902 | "on matching the hostname", |
| 903 | self, exc_info=True) |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 904 | self._sock.close() |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 905 | self._wakeup_waiter(exc) |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 906 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 907 | |
| 908 | # Add extra info that becomes available after handshake. |
| 909 | self._extra.update(peercert=peercert, |
| 910 | cipher=self._sock.cipher(), |
| 911 | compression=self._sock.compression(), |
Victor Stinner | f7dc7fb | 2015-09-21 18:06:17 +0200 | [diff] [blame] | 912 | ssl_object=self._sock, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 913 | ) |
| 914 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 915 | self._read_wants_write = False |
| 916 | self._write_wants_read = False |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 917 | self._loop._add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 918 | self._protocol_connected = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 919 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 920 | # only wake up the waiter when connection_made() has been called |
| 921 | self._loop.call_soon(self._wakeup_waiter) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 922 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 923 | if self._loop.get_debug(): |
| 924 | dt = self._loop.time() - start_time |
| 925 | logger.debug("%r: SSL handshake took %.1f ms", self, dt * 1e3) |
| 926 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 927 | def pause_reading(self): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 928 | # 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] | 929 | # _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] | 930 | # know, although it doesn't look like it; write() will still |
| 931 | # accept more data for the buffer and eventually the app will |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 932 | # call resume_reading() again, and things will flow again. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 933 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 934 | if self._closing: |
| 935 | raise RuntimeError('Cannot pause_reading() when closing') |
| 936 | if self._paused: |
| 937 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 938 | self._paused = True |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 939 | self._loop._remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 940 | if self._loop.get_debug(): |
| 941 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 942 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 943 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 944 | if not self._paused: |
Andrew Svetlov | 3207a03 | 2014-05-27 21:24:43 +0300 | [diff] [blame] | 945 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 946 | self._paused = False |
| 947 | if self._closing: |
| 948 | return |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 949 | self._loop._add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 950 | if self._loop.get_debug(): |
| 951 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 952 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 953 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 954 | if self._conn_lost: |
| 955 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 956 | if self._write_wants_read: |
| 957 | self._write_wants_read = False |
| 958 | self._write_ready() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 959 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 960 | if self._buffer: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 961 | self._loop._add_writer(self._sock_fd, self._write_ready) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 962 | |
| 963 | try: |
| 964 | data = self._sock.recv(self.max_size) |
| 965 | except (BlockingIOError, InterruptedError, ssl.SSLWantReadError): |
| 966 | pass |
| 967 | except ssl.SSLWantWriteError: |
| 968 | self._read_wants_write = True |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 969 | self._loop._remove_reader(self._sock_fd) |
| 970 | self._loop._add_writer(self._sock_fd, self._write_ready) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -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, 'Fatal read error on SSL transport') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 973 | else: |
| 974 | if data: |
| 975 | self._protocol.data_received(data) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 976 | else: |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 977 | try: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 978 | if self._loop.get_debug(): |
| 979 | logger.debug("%r received EOF", self) |
Guido van Rossum | 3a70392 | 2013-11-01 14:19:35 -0700 | [diff] [blame] | 980 | keep_open = self._protocol.eof_received() |
| 981 | if keep_open: |
| 982 | logger.warning('returning true from eof_received() ' |
| 983 | 'has no effect when using ssl') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 984 | finally: |
| 985 | self.close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 986 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 987 | def _write_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 988 | if self._conn_lost: |
| 989 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 990 | if self._read_wants_write: |
| 991 | self._read_wants_write = False |
| 992 | self._read_ready() |
| 993 | |
| 994 | if not (self._paused or self._closing): |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 995 | self._loop._add_reader(self._sock_fd, self._read_ready) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 996 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 997 | if self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 998 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 999 | n = self._sock.send(self._buffer) |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 1000 | except (BlockingIOError, InterruptedError, ssl.SSLWantWriteError): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1001 | n = 0 |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1002 | except ssl.SSLWantReadError: |
| 1003 | n = 0 |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1004 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1005 | self._write_wants_read = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1006 | except Exception as exc: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1007 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1008 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1009 | self._fatal_error(exc, 'Fatal write error on SSL transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1010 | return |
| 1011 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1012 | if n: |
| 1013 | del self._buffer[:n] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1014 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1015 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1016 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1017 | if not self._buffer: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1018 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1019 | if self._closing: |
| 1020 | self._call_connection_lost(None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1021 | |
| 1022 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1023 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 1024 | raise TypeError('data argument must be a bytes-like object, ' |
| 1025 | 'not %r' % type(data).__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1026 | if not data: |
| 1027 | return |
| 1028 | |
| 1029 | if self._conn_lost: |
| 1030 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 1031 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1032 | self._conn_lost += 1 |
| 1033 | return |
| 1034 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1035 | if not self._buffer: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1036 | self._loop._add_writer(self._sock_fd, self._write_ready) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 1037 | |
| 1038 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1039 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1040 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1041 | |
| 1042 | def can_write_eof(self): |
| 1043 | return False |
| 1044 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1045 | |
| 1046 | class _SelectorDatagramTransport(_SelectorTransport): |
| 1047 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1048 | _buffer_factory = collections.deque |
| 1049 | |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 1050 | def __init__(self, loop, sock, protocol, address=None, |
| 1051 | waiter=None, extra=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1052 | super().__init__(loop, sock, protocol, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1053 | self._address = address |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1054 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 1055 | # only start reading when connection_made() has been called |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1056 | self._loop.call_soon(self._loop._add_reader, |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 1057 | self._sock_fd, self._read_ready) |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 1058 | if waiter is not None: |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 1059 | # only wake up the waiter when connection_made() has been called |
Yury Selivanov | 5d7e3b6 | 2015-11-17 12:19:41 -0500 | [diff] [blame] | 1060 | self._loop.call_soon(futures._set_result_unless_cancelled, |
| 1061 | waiter, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1062 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1063 | def get_write_buffer_size(self): |
| 1064 | return sum(len(data) for data, _ in self._buffer) |
| 1065 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1066 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 1067 | if self._conn_lost: |
| 1068 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1069 | try: |
| 1070 | data, addr = self._sock.recvfrom(self.max_size) |
| 1071 | except (BlockingIOError, InterruptedError): |
| 1072 | pass |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1073 | except OSError as exc: |
| 1074 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1075 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1076 | self._fatal_error(exc, 'Fatal read error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1077 | else: |
| 1078 | self._protocol.datagram_received(data, addr) |
| 1079 | |
| 1080 | def sendto(self, data, addr=None): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1081 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 1082 | raise TypeError('data argument must be a bytes-like object, ' |
| 1083 | 'not %r' % type(data).__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1084 | if not data: |
| 1085 | return |
| 1086 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1087 | if self._address and addr not in (None, self._address): |
| 1088 | raise ValueError('Invalid address: must be None or %s' % |
| 1089 | (self._address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1090 | |
| 1091 | if self._conn_lost and self._address: |
| 1092 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 1093 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1094 | self._conn_lost += 1 |
| 1095 | return |
| 1096 | |
| 1097 | if not self._buffer: |
| 1098 | # Attempt to send it right away first. |
| 1099 | try: |
| 1100 | if self._address: |
| 1101 | self._sock.send(data) |
| 1102 | else: |
| 1103 | self._sock.sendto(data, addr) |
| 1104 | return |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 1105 | except (BlockingIOError, InterruptedError): |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1106 | self._loop._add_writer(self._sock_fd, self._sendto_ready) |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1107 | except OSError as exc: |
| 1108 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1109 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1110 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1111 | self._fatal_error(exc, |
| 1112 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1113 | return |
| 1114 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1115 | # Ensure that what we buffer is immutable. |
| 1116 | self._buffer.append((bytes(data), addr)) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1117 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1118 | |
| 1119 | def _sendto_ready(self): |
| 1120 | while self._buffer: |
| 1121 | data, addr = self._buffer.popleft() |
| 1122 | try: |
| 1123 | if self._address: |
| 1124 | self._sock.send(data) |
| 1125 | else: |
| 1126 | self._sock.sendto(data, addr) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 1127 | except (BlockingIOError, InterruptedError): |
| 1128 | self._buffer.appendleft((data, addr)) # Try again later. |
| 1129 | break |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1130 | except OSError as exc: |
| 1131 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1132 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1133 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1134 | self._fatal_error(exc, |
| 1135 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1136 | return |
| 1137 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1138 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1139 | if not self._buffer: |
Yury Selivanov | 5b8d4f9 | 2016-10-05 17:48:59 -0400 | [diff] [blame] | 1140 | self._loop._remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1141 | if self._closing: |
| 1142 | self._call_connection_lost(None) |