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 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 14 | try: |
| 15 | import ssl |
| 16 | except ImportError: # pragma: no cover |
| 17 | ssl = None |
| 18 | |
| 19 | from . import base_events |
Yury Selivanov | 2a8911c | 2015-08-04 15:56:33 -0400 | [diff] [blame] | 20 | from . import compat |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 21 | from . import constants |
| 22 | from . import events |
| 23 | from . import futures |
| 24 | from . import selectors |
| 25 | from . import transports |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 26 | from . import sslproto |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 27 | from .coroutines import coroutine |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 28 | from .log import logger |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 29 | |
| 30 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 31 | def _test_selector_event(selector, fd, event): |
| 32 | # Test if the selector is monitoring 'event' events |
| 33 | # for the file descriptor 'fd'. |
| 34 | try: |
| 35 | key = selector.get_key(fd) |
| 36 | except KeyError: |
| 37 | return False |
| 38 | else: |
| 39 | return bool(key.events & event) |
| 40 | |
| 41 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 42 | class BaseSelectorEventLoop(base_events.BaseEventLoop): |
| 43 | """Selector event loop. |
| 44 | |
| 45 | See events.EventLoop for API specification. |
| 46 | """ |
| 47 | |
| 48 | def __init__(self, selector=None): |
| 49 | super().__init__() |
| 50 | |
| 51 | if selector is None: |
| 52 | selector = selectors.DefaultSelector() |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 53 | logger.debug('Using selector: %s', selector.__class__.__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 54 | self._selector = selector |
| 55 | self._make_self_pipe() |
| 56 | |
| 57 | def _make_socket_transport(self, sock, protocol, waiter=None, *, |
| 58 | extra=None, server=None): |
| 59 | return _SelectorSocketTransport(self, sock, protocol, waiter, |
| 60 | extra, server) |
| 61 | |
Victor Stinner | 15cc678 | 2015-01-09 00:09:10 +0100 | [diff] [blame] | 62 | def _make_ssl_transport(self, rawsock, protocol, sslcontext, waiter=None, |
| 63 | *, server_side=False, server_hostname=None, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 64 | extra=None, server=None): |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 65 | if not sslproto._is_sslproto_available(): |
| 66 | return self._make_legacy_ssl_transport( |
| 67 | rawsock, protocol, sslcontext, waiter, |
| 68 | server_side=server_side, server_hostname=server_hostname, |
| 69 | extra=extra, server=server) |
| 70 | |
| 71 | ssl_protocol = sslproto.SSLProtocol(self, protocol, sslcontext, waiter, |
| 72 | server_side, server_hostname) |
| 73 | _SelectorSocketTransport(self, rawsock, ssl_protocol, |
| 74 | extra=extra, server=server) |
| 75 | return ssl_protocol._app_transport |
| 76 | |
| 77 | def _make_legacy_ssl_transport(self, rawsock, protocol, sslcontext, |
| 78 | waiter, *, |
| 79 | server_side=False, server_hostname=None, |
| 80 | extra=None, server=None): |
| 81 | # Use the legacy API: SSL_write, SSL_read, etc. The legacy API is used |
| 82 | # 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] | 83 | return _SelectorSslTransport( |
| 84 | self, rawsock, protocol, sslcontext, waiter, |
| 85 | server_side, server_hostname, extra, server) |
| 86 | |
| 87 | def _make_datagram_transport(self, sock, protocol, |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 88 | address=None, waiter=None, extra=None): |
| 89 | return _SelectorDatagramTransport(self, sock, protocol, |
| 90 | address, waiter, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 91 | |
| 92 | def close(self): |
Victor Stinner | 956de69 | 2014-12-26 21:07:52 +0100 | [diff] [blame] | 93 | if self.is_running(): |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 94 | raise RuntimeError("Cannot close a running event loop") |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 95 | if self.is_closed(): |
| 96 | return |
| 97 | self._close_self_pipe() |
Victor Stinner | 5e63120 | 2014-11-21 00:23:27 +0100 | [diff] [blame] | 98 | super().close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 99 | if self._selector is not None: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 100 | self._selector.close() |
| 101 | self._selector = None |
| 102 | |
| 103 | def _socketpair(self): |
| 104 | raise NotImplementedError |
| 105 | |
| 106 | def _close_self_pipe(self): |
| 107 | self.remove_reader(self._ssock.fileno()) |
| 108 | self._ssock.close() |
| 109 | self._ssock = None |
| 110 | self._csock.close() |
| 111 | self._csock = None |
| 112 | self._internal_fds -= 1 |
| 113 | |
| 114 | def _make_self_pipe(self): |
| 115 | # A self-socket, really. :-) |
| 116 | self._ssock, self._csock = self._socketpair() |
| 117 | self._ssock.setblocking(False) |
| 118 | self._csock.setblocking(False) |
| 119 | self._internal_fds += 1 |
| 120 | self.add_reader(self._ssock.fileno(), self._read_from_self) |
| 121 | |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 122 | def _process_self_data(self, data): |
| 123 | pass |
| 124 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 125 | def _read_from_self(self): |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 126 | while True: |
| 127 | try: |
| 128 | data = self._ssock.recv(4096) |
| 129 | if not data: |
| 130 | break |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 131 | self._process_self_data(data) |
Victor Stinner | 54c4b8e | 2014-06-19 12:59:15 +0200 | [diff] [blame] | 132 | except InterruptedError: |
| 133 | continue |
| 134 | except BlockingIOError: |
| 135 | break |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 136 | |
| 137 | def _write_to_self(self): |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 138 | # This may be called from a different thread, possibly after |
| 139 | # _close_self_pipe() has been called or even while it is |
| 140 | # running. Guard for self._csock being None or closed. When |
| 141 | # a socket is closed, send() raises OSError (with errno set to |
| 142 | # EBADF, but let's not rely on the exact error code). |
| 143 | csock = self._csock |
| 144 | if csock is not None: |
| 145 | try: |
Victor Stinner | fe5649c | 2014-07-17 22:43:40 +0200 | [diff] [blame] | 146 | csock.send(b'\0') |
Guido van Rossum | 3d139d8 | 2014-05-06 14:42:40 -0700 | [diff] [blame] | 147 | except OSError: |
Victor Stinner | 65dd69a | 2014-07-25 22:36:05 +0200 | [diff] [blame] | 148 | if self._debug: |
| 149 | logger.debug("Fail to write a null byte into the " |
| 150 | "self-pipe socket", |
| 151 | exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 152 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 153 | def _start_serving(self, protocol_factory, sock, |
| 154 | sslcontext=None, server=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 155 | self.add_reader(sock.fileno(), self._accept_connection, |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 156 | protocol_factory, sock, sslcontext, server) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 157 | |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 158 | def _accept_connection(self, protocol_factory, sock, |
| 159 | sslcontext=None, server=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 160 | try: |
| 161 | conn, addr = sock.accept() |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 162 | if self._debug: |
| 163 | logger.debug("%r got a new connection from %r: %r", |
| 164 | server, addr, conn) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 165 | conn.setblocking(False) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 166 | except (BlockingIOError, InterruptedError, ConnectionAbortedError): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 167 | pass # False alarm. |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 168 | except OSError as exc: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 169 | # There's nowhere to send the error, so just log it. |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 170 | if exc.errno in (errno.EMFILE, errno.ENFILE, |
| 171 | errno.ENOBUFS, errno.ENOMEM): |
| 172 | # Some platforms (e.g. Linux keep reporting the FD as |
| 173 | # ready, so we remove the read handler temporarily. |
| 174 | # We'll try again in a while. |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 175 | self.call_exception_handler({ |
| 176 | 'message': 'socket.accept() out of system resource', |
| 177 | 'exception': exc, |
| 178 | 'socket': sock, |
| 179 | }) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 180 | self.remove_reader(sock.fileno()) |
| 181 | self.call_later(constants.ACCEPT_RETRY_DELAY, |
| 182 | self._start_serving, |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 183 | protocol_factory, sock, sslcontext, server) |
Guido van Rossum | 3317a13 | 2013-11-01 14:12:50 -0700 | [diff] [blame] | 184 | else: |
| 185 | raise # The event loop will catch, log and ignore it. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 186 | else: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 187 | extra = {'peername': addr} |
| 188 | accept = self._accept_connection2(protocol_factory, conn, extra, |
| 189 | sslcontext, server) |
| 190 | self.create_task(accept) |
| 191 | |
| 192 | @coroutine |
| 193 | def _accept_connection2(self, protocol_factory, conn, extra, |
| 194 | sslcontext=None, server=None): |
| 195 | protocol = None |
| 196 | transport = None |
| 197 | try: |
Victor Stinner | 29ad011 | 2015-01-15 00:04:21 +0100 | [diff] [blame] | 198 | protocol = protocol_factory() |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 199 | waiter = self.create_future() |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 200 | if sslcontext: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 201 | transport = self._make_ssl_transport( |
| 202 | conn, protocol, sslcontext, waiter=waiter, |
| 203 | server_side=True, extra=extra, server=server) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 204 | else: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 205 | transport = self._make_socket_transport( |
| 206 | conn, protocol, waiter=waiter, extra=extra, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 207 | server=server) |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 208 | |
| 209 | try: |
| 210 | yield from waiter |
| 211 | except: |
| 212 | transport.close() |
| 213 | raise |
| 214 | |
| 215 | # It's now up to the protocol to handle the connection. |
| 216 | except Exception as exc: |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 217 | if self._debug: |
Victor Stinner | 2934262 | 2015-01-29 14:15:19 +0100 | [diff] [blame] | 218 | context = { |
| 219 | 'message': ('Error on transport creation ' |
| 220 | 'for incoming connection'), |
| 221 | 'exception': exc, |
| 222 | } |
| 223 | if protocol is not None: |
| 224 | context['protocol'] = protocol |
| 225 | if transport is not None: |
| 226 | context['transport'] = transport |
| 227 | self.call_exception_handler(context) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 228 | |
| 229 | def add_reader(self, fd, callback, *args): |
| 230 | """Add a reader callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 231 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 232 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 233 | try: |
| 234 | key = self._selector.get_key(fd) |
| 235 | except KeyError: |
| 236 | self._selector.register(fd, selectors.EVENT_READ, |
| 237 | (handle, None)) |
| 238 | else: |
| 239 | mask, (reader, writer) = key.events, key.data |
| 240 | self._selector.modify(fd, mask | selectors.EVENT_READ, |
| 241 | (handle, writer)) |
| 242 | if reader is not None: |
| 243 | reader.cancel() |
| 244 | |
| 245 | def remove_reader(self, fd): |
| 246 | """Remove a reader callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 247 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 248 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 249 | try: |
| 250 | key = self._selector.get_key(fd) |
| 251 | except KeyError: |
| 252 | return False |
| 253 | else: |
| 254 | mask, (reader, writer) = key.events, key.data |
| 255 | mask &= ~selectors.EVENT_READ |
| 256 | if not mask: |
| 257 | self._selector.unregister(fd) |
| 258 | else: |
| 259 | self._selector.modify(fd, mask, (None, writer)) |
| 260 | |
| 261 | if reader is not None: |
| 262 | reader.cancel() |
| 263 | return True |
| 264 | else: |
| 265 | return False |
| 266 | |
| 267 | def add_writer(self, fd, callback, *args): |
| 268 | """Add a writer callback..""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 269 | self._check_closed() |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 270 | handle = events.Handle(callback, args, self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 271 | try: |
| 272 | key = self._selector.get_key(fd) |
| 273 | except KeyError: |
| 274 | self._selector.register(fd, selectors.EVENT_WRITE, |
| 275 | (None, handle)) |
| 276 | else: |
| 277 | mask, (reader, writer) = key.events, key.data |
| 278 | self._selector.modify(fd, mask | selectors.EVENT_WRITE, |
| 279 | (reader, handle)) |
| 280 | if writer is not None: |
| 281 | writer.cancel() |
| 282 | |
| 283 | def remove_writer(self, fd): |
| 284 | """Remove a writer callback.""" |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 285 | if self.is_closed(): |
Victor Stinner | eeeebcd | 2014-03-06 00:52:53 +0100 | [diff] [blame] | 286 | return False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 287 | try: |
| 288 | key = self._selector.get_key(fd) |
| 289 | except KeyError: |
| 290 | return False |
| 291 | else: |
| 292 | mask, (reader, writer) = key.events, key.data |
| 293 | # Remove both writer and connector. |
| 294 | mask &= ~selectors.EVENT_WRITE |
| 295 | if not mask: |
| 296 | self._selector.unregister(fd) |
| 297 | else: |
| 298 | self._selector.modify(fd, mask, (reader, None)) |
| 299 | |
| 300 | if writer is not None: |
| 301 | writer.cancel() |
| 302 | return True |
| 303 | else: |
| 304 | return False |
| 305 | |
| 306 | def sock_recv(self, sock, n): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 307 | """Receive data from the socket. |
| 308 | |
| 309 | The return value is a bytes object representing the data received. |
| 310 | The maximum amount of data to be received at once is specified by |
| 311 | nbytes. |
| 312 | |
| 313 | This method is a coroutine. |
| 314 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 315 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 316 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 317 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 318 | self._sock_recv(fut, False, sock, n) |
| 319 | return fut |
| 320 | |
| 321 | def _sock_recv(self, fut, registered, sock, n): |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 322 | # _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] | 323 | # be done immediately. Don't use it directly, call sock_recv(). |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 324 | fd = sock.fileno() |
| 325 | if registered: |
| 326 | # Remove the callback early. It should be rare that the |
| 327 | # selector says the fd is ready but the call still returns |
| 328 | # EAGAIN, and I am willing to take a hit in that case in |
| 329 | # order to simplify the common case. |
| 330 | self.remove_reader(fd) |
| 331 | if fut.cancelled(): |
| 332 | return |
| 333 | try: |
| 334 | data = sock.recv(n) |
| 335 | except (BlockingIOError, InterruptedError): |
| 336 | self.add_reader(fd, self._sock_recv, fut, True, sock, n) |
| 337 | except Exception as exc: |
| 338 | fut.set_exception(exc) |
| 339 | else: |
| 340 | fut.set_result(data) |
| 341 | |
| 342 | def sock_sendall(self, sock, data): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 343 | """Send data to the socket. |
| 344 | |
| 345 | The socket must be connected to a remote socket. This method continues |
| 346 | to send data from data until either all data has been sent or an |
| 347 | error occurs. None is returned on success. On error, an exception is |
| 348 | raised, and there is no way to determine how much data, if any, was |
| 349 | successfully processed by the receiving end of the connection. |
| 350 | |
| 351 | This method is a coroutine. |
| 352 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 353 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 354 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 355 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 356 | if data: |
| 357 | self._sock_sendall(fut, False, sock, data) |
| 358 | else: |
| 359 | fut.set_result(None) |
| 360 | return fut |
| 361 | |
| 362 | def _sock_sendall(self, fut, registered, sock, data): |
| 363 | fd = sock.fileno() |
| 364 | |
| 365 | if registered: |
| 366 | self.remove_writer(fd) |
| 367 | if fut.cancelled(): |
| 368 | return |
| 369 | |
| 370 | try: |
| 371 | n = sock.send(data) |
| 372 | except (BlockingIOError, InterruptedError): |
| 373 | n = 0 |
| 374 | except Exception as exc: |
| 375 | fut.set_exception(exc) |
| 376 | return |
| 377 | |
| 378 | if n == len(data): |
| 379 | fut.set_result(None) |
| 380 | else: |
| 381 | if n: |
| 382 | data = data[n:] |
| 383 | self.add_writer(fd, self._sock_sendall, fut, True, sock, data) |
| 384 | |
| 385 | def sock_connect(self, sock, address): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 386 | """Connect to a remote socket at address. |
| 387 | |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 388 | This method is a coroutine. |
| 389 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 390 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 391 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 392 | |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 393 | fut = self.create_future() |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 394 | if hasattr(socket, 'AF_UNIX') and sock.family == socket.AF_UNIX: |
| 395 | self._sock_connect(fut, sock, address) |
| 396 | else: |
Yury Selivanov | 63bf487 | 2016-06-28 11:00:22 -0400 | [diff] [blame] | 397 | resolved = base_events._ensure_resolved( |
| 398 | address, family=sock.family, proto=sock.proto, loop=self) |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 399 | resolved.add_done_callback( |
| 400 | lambda resolved: self._on_resolved(fut, sock, resolved)) |
| 401 | |
| 402 | return fut |
| 403 | |
| 404 | def _on_resolved(self, fut, sock, resolved): |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 405 | try: |
Yury Selivanov | f1c6fa9 | 2016-06-08 12:33:31 -0400 | [diff] [blame] | 406 | _, _, _, _, address = resolved.result()[0] |
| 407 | except Exception as exc: |
| 408 | fut.set_exception(exc) |
Victor Stinner | 2877346 | 2014-02-13 09:24:37 +0100 | [diff] [blame] | 409 | else: |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 410 | self._sock_connect(fut, sock, address) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 411 | |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 412 | def _sock_connect(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 413 | fd = sock.fileno() |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 414 | try: |
Victor Stinner | c9d11c3 | 2015-04-07 21:38:04 +0200 | [diff] [blame] | 415 | sock.connect(address) |
| 416 | except (BlockingIOError, InterruptedError): |
| 417 | # Issue #23618: When the C function connect() fails with EINTR, the |
| 418 | # connection runs in background. We have to wait until the socket |
| 419 | # becomes writable to be notified when the connection succeed or |
| 420 | # fails. |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 421 | fut.add_done_callback(functools.partial(self._sock_connect_done, |
Victor Stinner | 3531d90 | 2015-01-09 01:42:52 +0100 | [diff] [blame] | 422 | fd)) |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 423 | self.add_writer(fd, self._sock_connect_cb, fut, sock, address) |
| 424 | except Exception as exc: |
| 425 | fut.set_exception(exc) |
| 426 | else: |
| 427 | fut.set_result(None) |
| 428 | |
Victor Stinner | 3531d90 | 2015-01-09 01:42:52 +0100 | [diff] [blame] | 429 | def _sock_connect_done(self, fd, fut): |
| 430 | self.remove_writer(fd) |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 431 | |
| 432 | def _sock_connect_cb(self, fut, sock, address): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 433 | if fut.cancelled(): |
| 434 | return |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 435 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 436 | try: |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 437 | err = sock.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR) |
| 438 | if err != 0: |
| 439 | # Jump to any except clause below. |
| 440 | raise OSError(err, 'Connect call failed %s' % (address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 441 | except (BlockingIOError, InterruptedError): |
Victor Stinner | d5aeccf9 | 2014-08-31 15:07:57 +0200 | [diff] [blame] | 442 | # socket is still registered, the callback will be retried later |
| 443 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 444 | except Exception as exc: |
| 445 | fut.set_exception(exc) |
| 446 | else: |
| 447 | fut.set_result(None) |
| 448 | |
| 449 | def sock_accept(self, sock): |
Victor Stinner | d143209 | 2014-06-19 17:11:49 +0200 | [diff] [blame] | 450 | """Accept a connection. |
| 451 | |
| 452 | The socket must be bound to an address and listening for connections. |
| 453 | The return value is a pair (conn, address) where conn is a new socket |
| 454 | object usable to send and receive data on the connection, and address |
| 455 | is the address bound to the socket on the other end of the connection. |
| 456 | |
| 457 | This method is a coroutine. |
| 458 | """ |
Victor Stinner | aa41b9b | 2015-02-04 14:50:59 +0100 | [diff] [blame] | 459 | if self._debug and sock.gettimeout() != 0: |
Victor Stinner | 9c9f1f1 | 2014-07-29 23:08:17 +0200 | [diff] [blame] | 460 | raise ValueError("the socket must be non-blocking") |
Yury Selivanov | 7661db6 | 2016-05-16 15:38:39 -0400 | [diff] [blame] | 461 | fut = self.create_future() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 462 | self._sock_accept(fut, False, sock) |
| 463 | return fut |
| 464 | |
| 465 | def _sock_accept(self, fut, registered, sock): |
| 466 | fd = sock.fileno() |
| 467 | if registered: |
| 468 | self.remove_reader(fd) |
| 469 | if fut.cancelled(): |
| 470 | return |
| 471 | try: |
| 472 | conn, address = sock.accept() |
| 473 | conn.setblocking(False) |
| 474 | except (BlockingIOError, InterruptedError): |
| 475 | self.add_reader(fd, self._sock_accept, fut, True, sock) |
| 476 | except Exception as exc: |
| 477 | fut.set_exception(exc) |
| 478 | else: |
| 479 | fut.set_result((conn, address)) |
| 480 | |
| 481 | def _process_events(self, event_list): |
| 482 | for key, mask in event_list: |
| 483 | fileobj, (reader, writer) = key.fileobj, key.data |
| 484 | if mask & selectors.EVENT_READ and reader is not None: |
| 485 | if reader._cancelled: |
| 486 | self.remove_reader(fileobj) |
| 487 | else: |
| 488 | self._add_callback(reader) |
| 489 | if mask & selectors.EVENT_WRITE and writer is not None: |
| 490 | if writer._cancelled: |
| 491 | self.remove_writer(fileobj) |
| 492 | else: |
| 493 | self._add_callback(writer) |
| 494 | |
| 495 | def _stop_serving(self, sock): |
| 496 | self.remove_reader(sock.fileno()) |
| 497 | sock.close() |
| 498 | |
| 499 | |
Yury Selivanov | c098241 | 2014-02-18 18:41:13 -0500 | [diff] [blame] | 500 | class _SelectorTransport(transports._FlowControlMixin, |
| 501 | transports.Transport): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 502 | |
| 503 | max_size = 256 * 1024 # Buffer size passed to recv(). |
| 504 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 505 | _buffer_factory = bytearray # Constructs initial value for self._buffer. |
| 506 | |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 507 | # Attribute used in the destructor: it must be set even if the constructor |
| 508 | # is not called (see _SelectorSslTransport which may start by raising an |
| 509 | # exception) |
| 510 | _sock = None |
| 511 | |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 512 | def __init__(self, loop, sock, protocol, extra=None, server=None): |
Victor Stinner | 004adb9 | 2014-11-05 15:27:41 +0100 | [diff] [blame] | 513 | super().__init__(extra, loop) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 514 | self._extra['socket'] = sock |
| 515 | self._extra['sockname'] = sock.getsockname() |
| 516 | if 'peername' not in self._extra: |
| 517 | try: |
| 518 | self._extra['peername'] = sock.getpeername() |
| 519 | except socket.error: |
| 520 | self._extra['peername'] = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 521 | self._sock = sock |
| 522 | self._sock_fd = sock.fileno() |
| 523 | self._protocol = protocol |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 524 | self._protocol_connected = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 525 | self._server = server |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 526 | self._buffer = self._buffer_factory() |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 527 | self._conn_lost = 0 # Set when call to connection_lost scheduled. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 528 | self._closing = False # Set when close() called. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 529 | if self._server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 530 | self._server._attach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 531 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 532 | def __repr__(self): |
Victor Stinner | 0e34dc3 | 2014-10-12 09:52:11 +0200 | [diff] [blame] | 533 | info = [self.__class__.__name__] |
| 534 | if self._sock is None: |
| 535 | info.append('closed') |
| 536 | elif self._closing: |
| 537 | info.append('closing') |
| 538 | info.append('fd=%s' % self._sock_fd) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 539 | # test if the transport was closed |
Victor Stinner | 79fd962 | 2015-03-27 15:20:08 +0100 | [diff] [blame] | 540 | if self._loop is not None and not self._loop.is_closed(): |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 541 | polling = _test_selector_event(self._loop._selector, |
| 542 | self._sock_fd, selectors.EVENT_READ) |
| 543 | if polling: |
| 544 | info.append('read=polling') |
| 545 | else: |
| 546 | info.append('read=idle') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 547 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 548 | polling = _test_selector_event(self._loop._selector, |
Victor Stinner | 15cc678 | 2015-01-09 00:09:10 +0100 | [diff] [blame] | 549 | self._sock_fd, |
| 550 | selectors.EVENT_WRITE) |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 551 | if polling: |
| 552 | state = 'polling' |
| 553 | else: |
| 554 | state = 'idle' |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 555 | |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 556 | bufsize = self.get_write_buffer_size() |
| 557 | info.append('write=<%s, bufsize=%s>' % (state, bufsize)) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 558 | return '<%s>' % ' '.join(info) |
| 559 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 560 | def abort(self): |
| 561 | self._force_close(None) |
| 562 | |
Yury Selivanov | 5bb1afb | 2015-11-16 12:43:21 -0500 | [diff] [blame] | 563 | def is_closing(self): |
| 564 | return self._closing |
| 565 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 566 | def close(self): |
| 567 | if self._closing: |
| 568 | return |
| 569 | self._closing = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 570 | self._loop.remove_reader(self._sock_fd) |
| 571 | if not self._buffer: |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 572 | self._conn_lost += 1 |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 573 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 574 | self._loop.call_soon(self._call_connection_lost, None) |
| 575 | |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 576 | # On Python 3.3 and older, objects with a destructor part of a reference |
| 577 | # cycle are never destroyed. It's not more the case on Python 3.4 thanks |
| 578 | # to the PEP 442. |
Yury Selivanov | 2a8911c | 2015-08-04 15:56:33 -0400 | [diff] [blame] | 579 | if compat.PY34: |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 580 | def __del__(self): |
| 581 | if self._sock is not None: |
| 582 | warnings.warn("unclosed transport %r" % self, ResourceWarning) |
| 583 | self._sock.close() |
| 584 | |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 585 | def _fatal_error(self, exc, message='Fatal error on transport'): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 586 | # Should be called from exception handler only. |
Victor Stinner | c94a93a | 2016-04-01 21:43:39 +0200 | [diff] [blame] | 587 | if isinstance(exc, base_events._FATAL_ERROR_IGNORE): |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 588 | if self._loop.get_debug(): |
| 589 | logger.debug("%r: %s", self, message, exc_info=True) |
| 590 | else: |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 591 | self._loop.call_exception_handler({ |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 592 | 'message': message, |
Yury Selivanov | ff827f0 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 593 | 'exception': exc, |
| 594 | 'transport': self, |
| 595 | 'protocol': self._protocol, |
| 596 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 597 | self._force_close(exc) |
| 598 | |
| 599 | def _force_close(self, exc): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 600 | if self._conn_lost: |
| 601 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 602 | if self._buffer: |
| 603 | self._buffer.clear() |
| 604 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 605 | if not self._closing: |
| 606 | self._closing = True |
| 607 | self._loop.remove_reader(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 608 | self._conn_lost += 1 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 609 | self._loop.call_soon(self._call_connection_lost, exc) |
| 610 | |
| 611 | def _call_connection_lost(self, exc): |
| 612 | try: |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 613 | if self._protocol_connected: |
| 614 | self._protocol.connection_lost(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 615 | finally: |
| 616 | self._sock.close() |
| 617 | self._sock = None |
| 618 | self._protocol = None |
| 619 | self._loop = None |
| 620 | server = self._server |
| 621 | if server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 622 | server._detach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 623 | self._server = None |
| 624 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 625 | def get_write_buffer_size(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 626 | return len(self._buffer) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 627 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 628 | |
| 629 | class _SelectorSocketTransport(_SelectorTransport): |
| 630 | |
| 631 | def __init__(self, loop, sock, protocol, waiter=None, |
| 632 | extra=None, server=None): |
| 633 | super().__init__(loop, sock, protocol, extra, server) |
| 634 | self._eof = False |
| 635 | self._paused = False |
| 636 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 637 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | fa73779 | 2015-01-29 00:36:51 +0100 | [diff] [blame] | 638 | # only start reading when connection_made() has been called |
| 639 | self._loop.call_soon(self._loop.add_reader, |
| 640 | self._sock_fd, self._read_ready) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 641 | if waiter is not None: |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 642 | # only wake up the waiter when connection_made() has been called |
Yury Selivanov | 5d7e3b6 | 2015-11-17 12:19:41 -0500 | [diff] [blame] | 643 | self._loop.call_soon(futures._set_result_unless_cancelled, |
| 644 | waiter, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 645 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 646 | def pause_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 647 | if self._closing: |
| 648 | raise RuntimeError('Cannot pause_reading() when closing') |
| 649 | if self._paused: |
| 650 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 651 | self._paused = True |
| 652 | self._loop.remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 653 | if self._loop.get_debug(): |
| 654 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 655 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 656 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 657 | if not self._paused: |
| 658 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 659 | self._paused = False |
| 660 | if self._closing: |
| 661 | return |
| 662 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 663 | if self._loop.get_debug(): |
| 664 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 665 | |
| 666 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 667 | if self._conn_lost: |
| 668 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 669 | try: |
| 670 | data = self._sock.recv(self.max_size) |
| 671 | except (BlockingIOError, InterruptedError): |
| 672 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 673 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 674 | self._fatal_error(exc, 'Fatal read error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 675 | else: |
| 676 | if data: |
| 677 | self._protocol.data_received(data) |
| 678 | else: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 679 | if self._loop.get_debug(): |
| 680 | logger.debug("%r received EOF", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 681 | keep_open = self._protocol.eof_received() |
Guido van Rossum | 1f683bb | 2013-10-30 14:36:58 -0700 | [diff] [blame] | 682 | if keep_open: |
| 683 | # We're keeping the connection open so the |
| 684 | # protocol can write more, but we still can't |
| 685 | # receive more, so remove the reader callback. |
| 686 | self._loop.remove_reader(self._sock_fd) |
| 687 | else: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 688 | self.close() |
| 689 | |
| 690 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 691 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 692 | raise TypeError('data argument must be a bytes-like object, ' |
| 693 | 'not %r' % type(data).__name__) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 694 | if self._eof: |
| 695 | raise RuntimeError('Cannot call write() after write_eof()') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 696 | if not data: |
| 697 | return |
| 698 | |
| 699 | if self._conn_lost: |
| 700 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 701 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 702 | self._conn_lost += 1 |
| 703 | return |
| 704 | |
| 705 | if not self._buffer: |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 706 | # Optimization: try to send now. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 707 | try: |
| 708 | n = self._sock.send(data) |
| 709 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 710 | pass |
| 711 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 712 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 713 | return |
| 714 | else: |
| 715 | data = data[n:] |
| 716 | if not data: |
| 717 | return |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 718 | # Not all was written; register write handler. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 719 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 720 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 721 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 722 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 723 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 724 | |
| 725 | def _write_ready(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 726 | assert self._buffer, 'Data should not be empty' |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 727 | |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 728 | if self._conn_lost: |
| 729 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 730 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 731 | n = self._sock.send(self._buffer) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 732 | except (BlockingIOError, InterruptedError): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 733 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 734 | except Exception as exc: |
| 735 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 736 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 737 | self._fatal_error(exc, 'Fatal write error on socket transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 738 | else: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 739 | if n: |
| 740 | del self._buffer[:n] |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 741 | self._maybe_resume_protocol() # May append to buffer. |
| 742 | if not self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 743 | self._loop.remove_writer(self._sock_fd) |
| 744 | if self._closing: |
| 745 | self._call_connection_lost(None) |
| 746 | elif self._eof: |
| 747 | self._sock.shutdown(socket.SHUT_WR) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 748 | |
| 749 | def write_eof(self): |
| 750 | if self._eof: |
| 751 | return |
| 752 | self._eof = True |
| 753 | if not self._buffer: |
| 754 | self._sock.shutdown(socket.SHUT_WR) |
| 755 | |
| 756 | def can_write_eof(self): |
| 757 | return True |
| 758 | |
| 759 | |
| 760 | class _SelectorSslTransport(_SelectorTransport): |
| 761 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 762 | _buffer_factory = bytearray |
| 763 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 764 | def __init__(self, loop, rawsock, protocol, sslcontext, waiter=None, |
| 765 | server_side=False, server_hostname=None, |
| 766 | extra=None, server=None): |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 767 | if ssl is None: |
| 768 | raise RuntimeError('stdlib ssl module not available') |
| 769 | |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 770 | if not sslcontext: |
| 771 | sslcontext = sslproto._create_transport_context(server_side, server_hostname) |
Guido van Rossum | 28dff0d | 2013-11-01 14:22:30 -0700 | [diff] [blame] | 772 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 773 | wrap_kwargs = { |
| 774 | 'server_side': server_side, |
| 775 | 'do_handshake_on_connect': False, |
| 776 | } |
Benjamin Peterson | 7243b57 | 2014-11-23 17:04:34 -0600 | [diff] [blame] | 777 | if server_hostname and not server_side: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 778 | wrap_kwargs['server_hostname'] = server_hostname |
| 779 | sslsock = sslcontext.wrap_socket(rawsock, **wrap_kwargs) |
| 780 | |
| 781 | super().__init__(loop, sslsock, protocol, extra, server) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 782 | # the protocol connection is only made after the SSL handshake |
| 783 | self._protocol_connected = False |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 784 | |
| 785 | self._server_hostname = server_hostname |
| 786 | self._waiter = waiter |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 787 | self._sslcontext = sslcontext |
| 788 | self._paused = False |
| 789 | |
| 790 | # SSL-specific extra info. (peercert is set later) |
| 791 | self._extra.update(sslcontext=sslcontext) |
| 792 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 793 | if self._loop.get_debug(): |
| 794 | logger.debug("%r starts SSL handshake", self) |
| 795 | start_time = self._loop.time() |
| 796 | else: |
| 797 | start_time = None |
| 798 | self._on_handshake(start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 799 | |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 800 | def _wakeup_waiter(self, exc=None): |
| 801 | if self._waiter is None: |
| 802 | return |
| 803 | if not self._waiter.cancelled(): |
| 804 | if exc is not None: |
| 805 | self._waiter.set_exception(exc) |
| 806 | else: |
| 807 | self._waiter.set_result(None) |
| 808 | self._waiter = None |
| 809 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 810 | def _on_handshake(self, start_time): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 811 | try: |
| 812 | self._sock.do_handshake() |
| 813 | except ssl.SSLWantReadError: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 814 | self._loop.add_reader(self._sock_fd, |
| 815 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 816 | return |
| 817 | except ssl.SSLWantWriteError: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 818 | self._loop.add_writer(self._sock_fd, |
| 819 | self._on_handshake, start_time) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 820 | return |
| 821 | except BaseException as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 822 | if self._loop.get_debug(): |
| 823 | logger.warning("%r: SSL handshake failed", |
| 824 | self, exc_info=True) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 825 | self._loop.remove_reader(self._sock_fd) |
| 826 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 827 | self._sock.close() |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 828 | self._wakeup_waiter(exc) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 829 | if isinstance(exc, Exception): |
| 830 | return |
| 831 | else: |
| 832 | raise |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 833 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 834 | self._loop.remove_reader(self._sock_fd) |
| 835 | self._loop.remove_writer(self._sock_fd) |
| 836 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 837 | peercert = self._sock.getpeercert() |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 838 | if not hasattr(self._sslcontext, 'check_hostname'): |
| 839 | # Verify hostname if requested, Python 3.4+ uses check_hostname |
| 840 | # and checks the hostname in do_handshake() |
| 841 | if (self._server_hostname and |
| 842 | self._sslcontext.verify_mode != ssl.CERT_NONE): |
| 843 | try: |
| 844 | ssl.match_hostname(peercert, self._server_hostname) |
| 845 | except Exception as exc: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 846 | if self._loop.get_debug(): |
| 847 | logger.warning("%r: SSL handshake failed " |
| 848 | "on matching the hostname", |
| 849 | self, exc_info=True) |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 850 | self._sock.close() |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 851 | self._wakeup_waiter(exc) |
Christian Heimes | 6d8c1ab | 2013-12-06 00:23:13 +0100 | [diff] [blame] | 852 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 853 | |
| 854 | # Add extra info that becomes available after handshake. |
| 855 | self._extra.update(peercert=peercert, |
| 856 | cipher=self._sock.cipher(), |
| 857 | compression=self._sock.compression(), |
Victor Stinner | f7dc7fb | 2015-09-21 18:06:17 +0200 | [diff] [blame] | 858 | ssl_object=self._sock, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 859 | ) |
| 860 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 861 | self._read_wants_write = False |
| 862 | self._write_wants_read = False |
| 863 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 864 | self._protocol_connected = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 865 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 866 | # only wake up the waiter when connection_made() has been called |
| 867 | self._loop.call_soon(self._wakeup_waiter) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 868 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 869 | if self._loop.get_debug(): |
| 870 | dt = self._loop.time() - start_time |
| 871 | logger.debug("%r: SSL handshake took %.1f ms", self, dt * 1e3) |
| 872 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 873 | def pause_reading(self): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 874 | # 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] | 875 | # _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] | 876 | # know, although it doesn't look like it; write() will still |
| 877 | # accept more data for the buffer and eventually the app will |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 878 | # call resume_reading() again, and things will flow again. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 879 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 880 | if self._closing: |
| 881 | raise RuntimeError('Cannot pause_reading() when closing') |
| 882 | if self._paused: |
| 883 | raise RuntimeError('Already paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 884 | self._paused = True |
| 885 | self._loop.remove_reader(self._sock_fd) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 886 | if self._loop.get_debug(): |
| 887 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 888 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 889 | def resume_reading(self): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 890 | if not self._paused: |
Andrew Svetlov | 3207a03 | 2014-05-27 21:24:43 +0300 | [diff] [blame] | 891 | raise RuntimeError('Not paused') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 892 | self._paused = False |
| 893 | if self._closing: |
| 894 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 895 | self._loop.add_reader(self._sock_fd, self._read_ready) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 896 | if self._loop.get_debug(): |
| 897 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 898 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 899 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 900 | if self._conn_lost: |
| 901 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 902 | if self._write_wants_read: |
| 903 | self._write_wants_read = False |
| 904 | self._write_ready() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 905 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 906 | if self._buffer: |
| 907 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 908 | |
| 909 | try: |
| 910 | data = self._sock.recv(self.max_size) |
| 911 | except (BlockingIOError, InterruptedError, ssl.SSLWantReadError): |
| 912 | pass |
| 913 | except ssl.SSLWantWriteError: |
| 914 | self._read_wants_write = True |
| 915 | self._loop.remove_reader(self._sock_fd) |
| 916 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 917 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 918 | self._fatal_error(exc, 'Fatal read error on SSL transport') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 919 | else: |
| 920 | if data: |
| 921 | self._protocol.data_received(data) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 922 | else: |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 923 | try: |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 924 | if self._loop.get_debug(): |
| 925 | logger.debug("%r received EOF", self) |
Guido van Rossum | 3a70392 | 2013-11-01 14:19:35 -0700 | [diff] [blame] | 926 | keep_open = self._protocol.eof_received() |
| 927 | if keep_open: |
| 928 | logger.warning('returning true from eof_received() ' |
| 929 | 'has no effect when using ssl') |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 930 | finally: |
| 931 | self.close() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 932 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 933 | def _write_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 934 | if self._conn_lost: |
| 935 | return |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 936 | if self._read_wants_write: |
| 937 | self._read_wants_write = False |
| 938 | self._read_ready() |
| 939 | |
| 940 | if not (self._paused or self._closing): |
| 941 | self._loop.add_reader(self._sock_fd, self._read_ready) |
| 942 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 943 | if self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 944 | try: |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 945 | n = self._sock.send(self._buffer) |
Victor Stinner | c89c8a7 | 2014-02-26 17:35:30 +0100 | [diff] [blame] | 946 | except (BlockingIOError, InterruptedError, ssl.SSLWantWriteError): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 947 | n = 0 |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 948 | except ssl.SSLWantReadError: |
| 949 | n = 0 |
| 950 | self._loop.remove_writer(self._sock_fd) |
| 951 | self._write_wants_read = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 952 | except Exception as exc: |
| 953 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 954 | self._buffer.clear() |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 955 | self._fatal_error(exc, 'Fatal write error on SSL transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 956 | return |
| 957 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 958 | if n: |
| 959 | del self._buffer[:n] |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 960 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 961 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 962 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 963 | if not self._buffer: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 964 | self._loop.remove_writer(self._sock_fd) |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 965 | if self._closing: |
| 966 | self._call_connection_lost(None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 967 | |
| 968 | def write(self, data): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 969 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 970 | raise TypeError('data argument must be a bytes-like object, ' |
| 971 | 'not %r' % type(data).__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 972 | if not data: |
| 973 | return |
| 974 | |
| 975 | if self._conn_lost: |
| 976 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 977 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 978 | self._conn_lost += 1 |
| 979 | return |
| 980 | |
Guido van Rossum | 2b57016 | 2013-11-01 14:18:02 -0700 | [diff] [blame] | 981 | if not self._buffer: |
| 982 | self._loop.add_writer(self._sock_fd, self._write_ready) |
| 983 | |
| 984 | # Add it to the buffer. |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 985 | self._buffer.extend(data) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 986 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 987 | |
| 988 | def can_write_eof(self): |
| 989 | return False |
| 990 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 991 | |
| 992 | class _SelectorDatagramTransport(_SelectorTransport): |
| 993 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 994 | _buffer_factory = collections.deque |
| 995 | |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 996 | def __init__(self, loop, sock, protocol, address=None, |
| 997 | waiter=None, extra=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 998 | super().__init__(loop, sock, protocol, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 999 | self._address = address |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1000 | self._loop.call_soon(self._protocol.connection_made, self) |
Victor Stinner | 47bbea7 | 2015-01-29 02:56:05 +0100 | [diff] [blame] | 1001 | # only start reading when connection_made() has been called |
| 1002 | self._loop.call_soon(self._loop.add_reader, |
| 1003 | self._sock_fd, self._read_ready) |
Victor Stinner | bfff45d | 2014-07-08 23:57:31 +0200 | [diff] [blame] | 1004 | if waiter is not None: |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 1005 | # only wake up the waiter when connection_made() has been called |
Yury Selivanov | 5d7e3b6 | 2015-11-17 12:19:41 -0500 | [diff] [blame] | 1006 | self._loop.call_soon(futures._set_result_unless_cancelled, |
| 1007 | waiter, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1008 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1009 | def get_write_buffer_size(self): |
| 1010 | return sum(len(data) for data, _ in self._buffer) |
| 1011 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1012 | def _read_ready(self): |
Yury Selivanov | ca2e0a4 | 2016-06-11 11:19:47 -0400 | [diff] [blame] | 1013 | if self._conn_lost: |
| 1014 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1015 | try: |
| 1016 | data, addr = self._sock.recvfrom(self.max_size) |
| 1017 | except (BlockingIOError, InterruptedError): |
| 1018 | pass |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1019 | except OSError as exc: |
| 1020 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1021 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1022 | self._fatal_error(exc, 'Fatal read error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1023 | else: |
| 1024 | self._protocol.datagram_received(data, addr) |
| 1025 | |
| 1026 | def sendto(self, data, addr=None): |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1027 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Victor Stinner | 3e72309 | 2016-02-01 12:46:38 +0100 | [diff] [blame] | 1028 | raise TypeError('data argument must be a bytes-like object, ' |
| 1029 | 'not %r' % type(data).__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1030 | if not data: |
| 1031 | return |
| 1032 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1033 | if self._address and addr not in (None, self._address): |
| 1034 | raise ValueError('Invalid address: must be None or %s' % |
| 1035 | (self._address,)) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1036 | |
| 1037 | if self._conn_lost and self._address: |
| 1038 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 1039 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1040 | self._conn_lost += 1 |
| 1041 | return |
| 1042 | |
| 1043 | if not self._buffer: |
| 1044 | # Attempt to send it right away first. |
| 1045 | try: |
| 1046 | if self._address: |
| 1047 | self._sock.send(data) |
| 1048 | else: |
| 1049 | self._sock.sendto(data, addr) |
| 1050 | return |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 1051 | except (BlockingIOError, InterruptedError): |
| 1052 | self._loop.add_writer(self._sock_fd, self._sendto_ready) |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1053 | except OSError as exc: |
| 1054 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1055 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1056 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1057 | self._fatal_error(exc, |
| 1058 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1059 | return |
| 1060 | |
Guido van Rossum | a5062c5 | 2013-11-27 14:12:48 -0800 | [diff] [blame] | 1061 | # Ensure that what we buffer is immutable. |
| 1062 | self._buffer.append((bytes(data), addr)) |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1063 | self._maybe_pause_protocol() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1064 | |
| 1065 | def _sendto_ready(self): |
| 1066 | while self._buffer: |
| 1067 | data, addr = self._buffer.popleft() |
| 1068 | try: |
| 1069 | if self._address: |
| 1070 | self._sock.send(data) |
| 1071 | else: |
| 1072 | self._sock.sendto(data, addr) |
Guido van Rossum | 2546a17 | 2013-10-18 10:10:36 -0700 | [diff] [blame] | 1073 | except (BlockingIOError, InterruptedError): |
| 1074 | self._buffer.appendleft((data, addr)) # Try again later. |
| 1075 | break |
Guido van Rossum | 2335de7 | 2013-11-15 16:51:48 -0800 | [diff] [blame] | 1076 | except OSError as exc: |
| 1077 | self._protocol.error_received(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1078 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1079 | except Exception as exc: |
Victor Stinner | 065ca25 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 1080 | self._fatal_error(exc, |
| 1081 | 'Fatal write error on datagram transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1082 | return |
| 1083 | |
Guido van Rossum | 355491d | 2013-10-18 15:17:11 -0700 | [diff] [blame] | 1084 | self._maybe_resume_protocol() # May append to buffer. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1085 | if not self._buffer: |
| 1086 | self._loop.remove_writer(self._sock_fd) |
| 1087 | if self._closing: |
| 1088 | self._call_connection_lost(None) |