Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 1 | """Event loop using a proactor and related classes. |
| 2 | |
| 3 | A proactor is a "notify-on-completion" multiplexer. Currently a |
| 4 | proactor is only implemented on Windows with IOCP. |
| 5 | """ |
| 6 | |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 7 | __all__ = 'BaseProactorEventLoop', |
Victor Stinner | 8dffc45 | 2014-01-25 15:32:06 +0100 | [diff] [blame] | 8 | |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 9 | import io |
| 10 | import os |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 11 | import socket |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 12 | import warnings |
Vladimir Matveev | b5c8cfa | 2018-12-18 13:56:17 -0800 | [diff] [blame] | 13 | import signal |
Andrew Svetlov | bafd4b5 | 2019-05-28 12:52:15 +0300 | [diff] [blame] | 14 | import collections |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 15 | |
| 16 | from . import base_events |
| 17 | from . import constants |
| 18 | from . import futures |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 19 | from . import exceptions |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 20 | from . import protocols |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 21 | from . import sslproto |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 22 | from . import transports |
Yury Selivanov | 8cd5165 | 2019-05-27 15:57:20 +0200 | [diff] [blame] | 23 | from . import trsock |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 24 | from .log import logger |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 25 | |
| 26 | |
Andrew Svetlov | bafd4b5 | 2019-05-28 12:52:15 +0300 | [diff] [blame] | 27 | def _set_socket_extra(transport, sock): |
| 28 | transport._extra['socket'] = trsock.TransportSocket(sock) |
| 29 | |
| 30 | try: |
| 31 | transport._extra['sockname'] = sock.getsockname() |
| 32 | except socket.error: |
| 33 | if transport._loop.get_debug(): |
| 34 | logger.warning( |
| 35 | "getsockname() failed on %r", sock, exc_info=True) |
| 36 | |
| 37 | if 'peername' not in transport._extra: |
| 38 | try: |
| 39 | transport._extra['peername'] = sock.getpeername() |
| 40 | except socket.error: |
| 41 | # UDP sockets may not have a peer name |
| 42 | transport._extra['peername'] = None |
| 43 | |
| 44 | |
Yury Selivanov | 3cb9914 | 2014-02-18 18:41:13 -0500 | [diff] [blame] | 45 | class _ProactorBasePipeTransport(transports._FlowControlMixin, |
| 46 | transports.BaseTransport): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 47 | """Base class for pipe and socket transports.""" |
| 48 | |
| 49 | def __init__(self, loop, sock, protocol, waiter=None, |
| 50 | extra=None, server=None): |
Victor Stinner | 004adb9 | 2014-11-05 15:27:41 +0100 | [diff] [blame] | 51 | super().__init__(extra, loop) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 52 | self._set_extra(sock) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 53 | self._sock = sock |
Yury Selivanov | dbf1022 | 2018-05-28 14:31:28 -0400 | [diff] [blame] | 54 | self.set_protocol(protocol) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 55 | self._server = server |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 56 | self._buffer = None # None or bytearray. |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 57 | self._read_fut = None |
| 58 | self._write_fut = None |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 59 | self._pending_write = 0 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 60 | self._conn_lost = 0 |
| 61 | self._closing = False # Set when close() called. |
| 62 | self._eof_written = False |
| 63 | if self._server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 64 | self._server._attach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 65 | self._loop.call_soon(self._protocol.connection_made, self) |
| 66 | if waiter is not None: |
Victor Stinner | f07801b | 2015-01-29 00:36:35 +0100 | [diff] [blame] | 67 | # only wake up the waiter when connection_made() has been called |
Yury Selivanov | 5d7e3b6 | 2015-11-17 12:19:41 -0500 | [diff] [blame] | 68 | self._loop.call_soon(futures._set_result_unless_cancelled, |
| 69 | waiter, None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 70 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 71 | def __repr__(self): |
Victor Stinner | 0e34dc3 | 2014-10-12 09:52:11 +0200 | [diff] [blame] | 72 | info = [self.__class__.__name__] |
Victor Stinner | 79c93ba | 2015-01-15 13:32:28 +0100 | [diff] [blame] | 73 | if self._sock is None: |
Victor Stinner | 0e34dc3 | 2014-10-12 09:52:11 +0200 | [diff] [blame] | 74 | info.append('closed') |
| 75 | elif self._closing: |
| 76 | info.append('closing') |
Victor Stinner | 79c93ba | 2015-01-15 13:32:28 +0100 | [diff] [blame] | 77 | if self._sock is not None: |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 78 | info.append(f'fd={self._sock.fileno()}') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 79 | if self._read_fut is not None: |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 80 | info.append(f'read={self._read_fut!r}') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 81 | if self._write_fut is not None: |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 82 | info.append(f'write={self._write_fut!r}') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 83 | if self._buffer: |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 84 | info.append(f'write_bufsize={len(self._buffer)}') |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 85 | if self._eof_written: |
| 86 | info.append('EOF written') |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 87 | return '<{}>'.format(' '.join(info)) |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 88 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 89 | def _set_extra(self, sock): |
| 90 | self._extra['pipe'] = sock |
| 91 | |
Yury Selivanov | a05a6ef | 2016-09-11 21:11:02 -0400 | [diff] [blame] | 92 | def set_protocol(self, protocol): |
| 93 | self._protocol = protocol |
| 94 | |
| 95 | def get_protocol(self): |
| 96 | return self._protocol |
| 97 | |
Yury Selivanov | 5bb1afb | 2015-11-16 12:43:21 -0500 | [diff] [blame] | 98 | def is_closing(self): |
| 99 | return self._closing |
| 100 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 101 | def close(self): |
| 102 | if self._closing: |
| 103 | return |
| 104 | self._closing = True |
| 105 | self._conn_lost += 1 |
| 106 | if not self._buffer and self._write_fut is None: |
| 107 | self._loop.call_soon(self._call_connection_lost, None) |
| 108 | if self._read_fut is not None: |
| 109 | self._read_fut.cancel() |
Victor Stinner | fcd58de | 2015-01-15 13:40:27 +0100 | [diff] [blame] | 110 | self._read_fut = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 111 | |
Victor Stinner | fb2c346 | 2019-01-10 11:24:40 +0100 | [diff] [blame] | 112 | def __del__(self, _warn=warnings.warn): |
INADA Naoki | 3e2ad8e | 2017-04-25 10:57:18 +0900 | [diff] [blame] | 113 | if self._sock is not None: |
Victor Stinner | fb2c346 | 2019-01-10 11:24:40 +0100 | [diff] [blame] | 114 | _warn(f"unclosed transport {self!r}", ResourceWarning, source=self) |
INADA Naoki | 3e2ad8e | 2017-04-25 10:57:18 +0900 | [diff] [blame] | 115 | self.close() |
Victor Stinner | 978a9af | 2015-01-29 17:50:58 +0100 | [diff] [blame] | 116 | |
Victor Stinner | 0ee29c2 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 117 | def _fatal_error(self, exc, message='Fatal error on pipe transport'): |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 118 | try: |
Andrew Svetlov | 1f39c28 | 2019-05-27 16:28:34 +0300 | [diff] [blame] | 119 | if isinstance(exc, OSError): |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 120 | if self._loop.get_debug(): |
| 121 | logger.debug("%r: %s", self, message, exc_info=True) |
| 122 | else: |
| 123 | self._loop.call_exception_handler({ |
| 124 | 'message': message, |
| 125 | 'exception': exc, |
| 126 | 'transport': self, |
| 127 | 'protocol': self._protocol, |
| 128 | }) |
| 129 | finally: |
| 130 | self._force_close(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 131 | |
| 132 | def _force_close(self, exc): |
Victor Stinner | 80fda71 | 2019-01-08 02:46:59 +0100 | [diff] [blame] | 133 | if self._empty_waiter is not None and not self._empty_waiter.done(): |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 134 | if exc is None: |
| 135 | self._empty_waiter.set_result(None) |
| 136 | else: |
| 137 | self._empty_waiter.set_exception(exc) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 138 | if self._closing: |
| 139 | return |
| 140 | self._closing = True |
| 141 | self._conn_lost += 1 |
| 142 | if self._write_fut: |
| 143 | self._write_fut.cancel() |
Victor Stinner | fcd58de | 2015-01-15 13:40:27 +0100 | [diff] [blame] | 144 | self._write_fut = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 145 | if self._read_fut: |
| 146 | self._read_fut.cancel() |
Victor Stinner | fcd58de | 2015-01-15 13:40:27 +0100 | [diff] [blame] | 147 | self._read_fut = None |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 148 | self._pending_write = 0 |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 149 | self._buffer = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 150 | self._loop.call_soon(self._call_connection_lost, exc) |
| 151 | |
| 152 | def _call_connection_lost(self, exc): |
| 153 | try: |
| 154 | self._protocol.connection_lost(exc) |
| 155 | finally: |
| 156 | # XXX If there is a pending overlapped read on the other |
| 157 | # end then it may fail with ERROR_NETNAME_DELETED if we |
| 158 | # just close our end. First calling shutdown() seems to |
| 159 | # cure it, but maybe using DisconnectEx() would be better. |
| 160 | if hasattr(self._sock, 'shutdown'): |
| 161 | self._sock.shutdown(socket.SHUT_RDWR) |
| 162 | self._sock.close() |
Victor Stinner | 29ad011 | 2015-01-15 00:04:21 +0100 | [diff] [blame] | 163 | self._sock = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 164 | server = self._server |
| 165 | if server is not None: |
Victor Stinner | b28dbac | 2014-07-11 22:52:21 +0200 | [diff] [blame] | 166 | server._detach() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 167 | self._server = None |
| 168 | |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 169 | def get_write_buffer_size(self): |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 170 | size = self._pending_write |
| 171 | if self._buffer is not None: |
| 172 | size += len(self._buffer) |
| 173 | return size |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 174 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 175 | |
| 176 | class _ProactorReadPipeTransport(_ProactorBasePipeTransport, |
| 177 | transports.ReadTransport): |
| 178 | """Transport for read pipes.""" |
| 179 | |
| 180 | def __init__(self, loop, sock, protocol, waiter=None, |
| 181 | extra=None, server=None): |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 182 | self._pending_data = None |
Yury Selivanov | dbf1022 | 2018-05-28 14:31:28 -0400 | [diff] [blame] | 183 | self._paused = True |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 184 | super().__init__(loop, sock, protocol, waiter, extra, server) |
Yury Selivanov | dbf1022 | 2018-05-28 14:31:28 -0400 | [diff] [blame] | 185 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 186 | self._loop.call_soon(self._loop_reading) |
Yury Selivanov | dbf1022 | 2018-05-28 14:31:28 -0400 | [diff] [blame] | 187 | self._paused = False |
| 188 | |
Yury Selivanov | d757aaf | 2017-12-18 17:03:23 -0500 | [diff] [blame] | 189 | def is_reading(self): |
| 190 | return not self._paused and not self._closing |
| 191 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 192 | def pause_reading(self): |
Yury Selivanov | d757aaf | 2017-12-18 17:03:23 -0500 | [diff] [blame] | 193 | if self._closing or self._paused: |
| 194 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 195 | self._paused = True |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 196 | |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 197 | # bpo-33694: Don't cancel self._read_fut because cancelling an |
| 198 | # overlapped WSASend() loss silently data with the current proactor |
| 199 | # implementation. |
| 200 | # |
| 201 | # If CancelIoEx() fails with ERROR_NOT_FOUND, it means that WSASend() |
| 202 | # completed (even if HasOverlappedIoCompleted() returns 0), but |
| 203 | # Overlapped.cancel() currently silently ignores the ERROR_NOT_FOUND |
| 204 | # error. Once the overlapped is ignored, the IOCP loop will ignores the |
| 205 | # completion I/O event and so not read the result of the overlapped |
| 206 | # WSARecv(). |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 207 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 208 | if self._loop.get_debug(): |
| 209 | logger.debug("%r pauses reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 210 | |
Guido van Rossum | 57497ad | 2013-10-18 07:58:20 -0700 | [diff] [blame] | 211 | def resume_reading(self): |
Yury Selivanov | d757aaf | 2017-12-18 17:03:23 -0500 | [diff] [blame] | 212 | if self._closing or not self._paused: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 213 | return |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 214 | |
Yury Selivanov | d757aaf | 2017-12-18 17:03:23 -0500 | [diff] [blame] | 215 | self._paused = False |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 216 | if self._read_fut is None: |
| 217 | self._loop.call_soon(self._loop_reading, None) |
| 218 | |
| 219 | data = self._pending_data |
| 220 | self._pending_data = None |
| 221 | if data is not None: |
| 222 | # Call the protocol methode after calling _loop_reading(), |
| 223 | # since the protocol can decide to pause reading again. |
| 224 | self._loop.call_soon(self._data_received, data) |
| 225 | |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 226 | if self._loop.get_debug(): |
| 227 | logger.debug("%r resumes reading", self) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 228 | |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 229 | def _eof_received(self): |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 230 | if self._loop.get_debug(): |
| 231 | logger.debug("%r received EOF", self) |
| 232 | |
| 233 | try: |
| 234 | keep_open = self._protocol.eof_received() |
Yury Selivanov | 431b540 | 2019-05-27 14:45:12 +0200 | [diff] [blame] | 235 | except (SystemExit, KeyboardInterrupt): |
| 236 | raise |
| 237 | except BaseException as exc: |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 238 | self._fatal_error( |
| 239 | exc, 'Fatal error: protocol.eof_received() call failed.') |
| 240 | return |
| 241 | |
| 242 | if not keep_open: |
| 243 | self.close() |
| 244 | |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 245 | def _data_received(self, data): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 246 | if self._paused: |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 247 | # Don't call any protocol method while reading is paused. |
| 248 | # The protocol will be called on resume_reading(). |
| 249 | assert self._pending_data is None |
| 250 | self._pending_data = data |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 251 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 252 | |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 253 | if not data: |
| 254 | self._eof_received() |
| 255 | return |
| 256 | |
| 257 | if isinstance(self._protocol, protocols.BufferedProtocol): |
| 258 | try: |
Victor Stinner | ff6c077 | 2018-06-08 10:32:06 +0200 | [diff] [blame] | 259 | protocols._feed_data_to_buffered_proto(self._protocol, data) |
Yury Selivanov | 431b540 | 2019-05-27 14:45:12 +0200 | [diff] [blame] | 260 | except (SystemExit, KeyboardInterrupt): |
| 261 | raise |
| 262 | except BaseException as exc: |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 263 | self._fatal_error(exc, |
| 264 | 'Fatal error: protocol.buffer_updated() ' |
| 265 | 'call failed.') |
| 266 | return |
| 267 | else: |
| 268 | self._protocol.data_received(data) |
| 269 | |
| 270 | def _loop_reading(self, fut=None): |
Yury Selivanov | 631fd38 | 2018-01-28 16:30:26 -0500 | [diff] [blame] | 271 | data = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 272 | try: |
| 273 | if fut is not None: |
| 274 | assert self._read_fut is fut or (self._read_fut is None and |
| 275 | self._closing) |
| 276 | self._read_fut = None |
Andrew Svetlov | 7c68407 | 2018-01-27 21:22:47 +0200 | [diff] [blame] | 277 | if fut.done(): |
| 278 | # deliver data later in "finally" clause |
| 279 | data = fut.result() |
| 280 | else: |
| 281 | # the future will be replaced by next proactor.recv call |
| 282 | fut.cancel() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 283 | |
| 284 | if self._closing: |
| 285 | # since close() has been called we ignore any read data |
| 286 | data = None |
| 287 | return |
| 288 | |
| 289 | if data == b'': |
| 290 | # we got end-of-file so no need to reschedule a new read |
| 291 | return |
| 292 | |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 293 | # bpo-33694: buffer_updated() has currently no fast path because of |
| 294 | # a data loss issue caused by overlapped WSASend() cancellation. |
| 295 | |
| 296 | if not self._paused: |
| 297 | # reschedule a new read |
| 298 | self._read_fut = self._loop._proactor.recv(self._sock, 32768) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 299 | except ConnectionAbortedError as exc: |
| 300 | if not self._closing: |
Victor Stinner | 0ee29c2 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 301 | self._fatal_error(exc, 'Fatal read error on pipe transport') |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 302 | elif self._loop.get_debug(): |
| 303 | logger.debug("Read error on pipe transport while closing", |
| 304 | exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 305 | except ConnectionResetError as exc: |
| 306 | self._force_close(exc) |
| 307 | except OSError as exc: |
Victor Stinner | 0ee29c2 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 308 | self._fatal_error(exc, 'Fatal read error on pipe transport') |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 309 | except exceptions.CancelledError: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 310 | if not self._closing: |
| 311 | raise |
| 312 | else: |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 313 | if not self._paused: |
| 314 | self._read_fut.add_done_callback(self._loop_reading) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 315 | finally: |
Victor Stinner | 79790bc | 2018-06-08 00:25:52 +0200 | [diff] [blame] | 316 | if data is not None: |
| 317 | self._data_received(data) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 318 | |
| 319 | |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 320 | class _ProactorBaseWritePipeTransport(_ProactorBasePipeTransport, |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 321 | transports.WriteTransport): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 322 | """Transport for write pipes.""" |
| 323 | |
Yury Selivanov | f111b3d | 2017-12-30 00:35:36 -0500 | [diff] [blame] | 324 | _start_tls_compatible = True |
| 325 | |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 326 | def __init__(self, *args, **kw): |
| 327 | super().__init__(*args, **kw) |
| 328 | self._empty_waiter = None |
| 329 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 330 | def write(self, data): |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 331 | if not isinstance(data, (bytes, bytearray, memoryview)): |
Yury Selivanov | 6370f34 | 2017-12-10 18:36:12 -0500 | [diff] [blame] | 332 | raise TypeError( |
| 333 | f"data argument must be a bytes-like object, " |
| 334 | f"not {type(data).__name__}") |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 335 | if self._eof_written: |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 336 | raise RuntimeError('write_eof() already called') |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 337 | if self._empty_waiter is not None: |
| 338 | raise RuntimeError('unable to write; sendfile is in progress') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 339 | |
| 340 | if not data: |
| 341 | return |
| 342 | |
| 343 | if self._conn_lost: |
| 344 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 345 | logger.warning('socket.send() raised exception.') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 346 | self._conn_lost += 1 |
| 347 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 348 | |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 349 | # Observable states: |
| 350 | # 1. IDLE: _write_fut and _buffer both None |
| 351 | # 2. WRITING: _write_fut set; _buffer None |
| 352 | # 3. BACKED UP: _write_fut set; _buffer a bytearray |
| 353 | # We always copy the data, so the caller can't modify it |
| 354 | # while we're still waiting for the I/O to happen. |
| 355 | if self._write_fut is None: # IDLE -> WRITING |
| 356 | assert self._buffer is None |
| 357 | # Pass a copy, except if it's already immutable. |
| 358 | self._loop_writing(data=bytes(data)) |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 359 | elif not self._buffer: # WRITING -> BACKED UP |
| 360 | # Make a mutable copy which we can extend. |
| 361 | self._buffer = bytearray(data) |
| 362 | self._maybe_pause_protocol() |
| 363 | else: # BACKED UP |
| 364 | # Append to buffer (also copies). |
| 365 | self._buffer.extend(data) |
| 366 | self._maybe_pause_protocol() |
| 367 | |
| 368 | def _loop_writing(self, f=None, data=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 369 | try: |
twisteroid ambassador | 9045199 | 2018-07-31 02:58:50 +0800 | [diff] [blame] | 370 | if f is not None and self._write_fut is None and self._closing: |
| 371 | # XXX most likely self._force_close() has been called, and |
| 372 | # it has set self._write_fut to None. |
| 373 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 374 | assert f is self._write_fut |
| 375 | self._write_fut = None |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 376 | self._pending_write = 0 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 377 | if f: |
| 378 | f.result() |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 379 | if data is None: |
| 380 | data = self._buffer |
| 381 | self._buffer = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 382 | if not data: |
| 383 | if self._closing: |
| 384 | self._loop.call_soon(self._call_connection_lost, None) |
| 385 | if self._eof_written: |
| 386 | self._sock.shutdown(socket.SHUT_WR) |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 387 | # Now that we've reduced the buffer size, tell the |
| 388 | # protocol to resume writing if it was paused. Note that |
| 389 | # we do this last since the callback is called immediately |
| 390 | # and it may add more data to the buffer (even causing the |
| 391 | # protocol to be paused again). |
| 392 | self._maybe_resume_protocol() |
Guido van Rossum | ebb8e58 | 2013-12-04 12:12:07 -0800 | [diff] [blame] | 393 | else: |
| 394 | self._write_fut = self._loop._proactor.send(self._sock, data) |
Victor Stinner | 915bcb0 | 2014-02-01 22:49:59 +0100 | [diff] [blame] | 395 | if not self._write_fut.done(): |
| 396 | assert self._pending_write == 0 |
| 397 | self._pending_write = len(data) |
| 398 | self._write_fut.add_done_callback(self._loop_writing) |
| 399 | self._maybe_pause_protocol() |
| 400 | else: |
| 401 | self._write_fut.add_done_callback(self._loop_writing) |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 402 | if self._empty_waiter is not None and self._write_fut is None: |
| 403 | self._empty_waiter.set_result(None) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 404 | except ConnectionResetError as exc: |
| 405 | self._force_close(exc) |
| 406 | except OSError as exc: |
Victor Stinner | 0ee29c2 | 2014-02-19 01:40:41 +0100 | [diff] [blame] | 407 | self._fatal_error(exc, 'Fatal write error on pipe transport') |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 408 | |
| 409 | def can_write_eof(self): |
| 410 | return True |
| 411 | |
| 412 | def write_eof(self): |
| 413 | self.close() |
| 414 | |
| 415 | def abort(self): |
| 416 | self._force_close(None) |
| 417 | |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 418 | def _make_empty_waiter(self): |
| 419 | if self._empty_waiter is not None: |
| 420 | raise RuntimeError("Empty waiter is already set") |
| 421 | self._empty_waiter = self._loop.create_future() |
| 422 | if self._write_fut is None: |
| 423 | self._empty_waiter.set_result(None) |
| 424 | return self._empty_waiter |
| 425 | |
| 426 | def _reset_empty_waiter(self): |
| 427 | self._empty_waiter = None |
| 428 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 429 | |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 430 | class _ProactorWritePipeTransport(_ProactorBaseWritePipeTransport): |
| 431 | def __init__(self, *args, **kw): |
| 432 | super().__init__(*args, **kw) |
| 433 | self._read_fut = self._loop._proactor.recv(self._sock, 16) |
| 434 | self._read_fut.add_done_callback(self._pipe_closed) |
| 435 | |
| 436 | def _pipe_closed(self, fut): |
| 437 | if fut.cancelled(): |
| 438 | # the transport has been closed |
| 439 | return |
Victor Stinner | 83bdfa0 | 2014-02-04 08:57:48 +0100 | [diff] [blame] | 440 | assert fut.result() == b'' |
| 441 | if self._closing: |
| 442 | assert self._read_fut is None |
| 443 | return |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 444 | assert fut is self._read_fut, (fut, self._read_fut) |
| 445 | self._read_fut = None |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 446 | if self._write_fut is not None: |
Victor Stinner | 6f24d83 | 2014-02-20 10:33:01 +0100 | [diff] [blame] | 447 | self._force_close(BrokenPipeError()) |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 448 | else: |
| 449 | self.close() |
| 450 | |
| 451 | |
Andrew Svetlov | bafd4b5 | 2019-05-28 12:52:15 +0300 | [diff] [blame] | 452 | class _ProactorDatagramTransport(_ProactorBasePipeTransport): |
| 453 | max_size = 256 * 1024 |
| 454 | def __init__(self, loop, sock, protocol, address=None, |
| 455 | waiter=None, extra=None): |
| 456 | self._address = address |
| 457 | self._empty_waiter = None |
| 458 | # We don't need to call _protocol.connection_made() since our base |
| 459 | # constructor does it for us. |
| 460 | super().__init__(loop, sock, protocol, waiter=waiter, extra=extra) |
| 461 | |
| 462 | # The base constructor sets _buffer = None, so we set it here |
| 463 | self._buffer = collections.deque() |
| 464 | self._loop.call_soon(self._loop_reading) |
| 465 | |
| 466 | def _set_extra(self, sock): |
| 467 | _set_socket_extra(self, sock) |
| 468 | |
| 469 | def get_write_buffer_size(self): |
| 470 | return sum(len(data) for data, _ in self._buffer) |
| 471 | |
| 472 | def abort(self): |
| 473 | self._force_close(None) |
| 474 | |
| 475 | def sendto(self, data, addr=None): |
| 476 | if not isinstance(data, (bytes, bytearray, memoryview)): |
| 477 | raise TypeError('data argument must be bytes-like object (%r)', |
| 478 | type(data)) |
| 479 | |
| 480 | if not data: |
| 481 | return |
| 482 | |
| 483 | if self._address is not None and addr not in (None, self._address): |
| 484 | raise ValueError( |
| 485 | f'Invalid address: must be None or {self._address}') |
| 486 | |
| 487 | if self._conn_lost and self._address: |
| 488 | if self._conn_lost >= constants.LOG_THRESHOLD_FOR_CONNLOST_WRITES: |
| 489 | logger.warning('socket.sendto() raised exception.') |
| 490 | self._conn_lost += 1 |
| 491 | return |
| 492 | |
| 493 | # Ensure that what we buffer is immutable. |
| 494 | self._buffer.append((bytes(data), addr)) |
| 495 | |
| 496 | if self._write_fut is None: |
| 497 | # No current write operations are active, kick one off |
| 498 | self._loop_writing() |
| 499 | # else: A write operation is already kicked off |
| 500 | |
| 501 | self._maybe_pause_protocol() |
| 502 | |
| 503 | def _loop_writing(self, fut=None): |
| 504 | try: |
| 505 | if self._conn_lost: |
| 506 | return |
| 507 | |
| 508 | assert fut is self._write_fut |
| 509 | self._write_fut = None |
| 510 | if fut: |
| 511 | # We are in a _loop_writing() done callback, get the result |
| 512 | fut.result() |
| 513 | |
| 514 | if not self._buffer or (self._conn_lost and self._address): |
| 515 | # The connection has been closed |
| 516 | if self._closing: |
| 517 | self._loop.call_soon(self._call_connection_lost, None) |
| 518 | return |
| 519 | |
| 520 | data, addr = self._buffer.popleft() |
| 521 | if self._address is not None: |
| 522 | self._write_fut = self._loop._proactor.send(self._sock, |
| 523 | data) |
| 524 | else: |
| 525 | self._write_fut = self._loop._proactor.sendto(self._sock, |
| 526 | data, |
| 527 | addr=addr) |
| 528 | except OSError as exc: |
| 529 | self._protocol.error_received(exc) |
| 530 | except Exception as exc: |
| 531 | self._fatal_error(exc, 'Fatal write error on datagram transport') |
| 532 | else: |
| 533 | self._write_fut.add_done_callback(self._loop_writing) |
| 534 | self._maybe_resume_protocol() |
| 535 | |
| 536 | def _loop_reading(self, fut=None): |
| 537 | data = None |
| 538 | try: |
| 539 | if self._conn_lost: |
| 540 | return |
| 541 | |
| 542 | assert self._read_fut is fut or (self._read_fut is None and |
| 543 | self._closing) |
| 544 | |
| 545 | self._read_fut = None |
| 546 | if fut is not None: |
| 547 | res = fut.result() |
| 548 | |
| 549 | if self._closing: |
| 550 | # since close() has been called we ignore any read data |
| 551 | data = None |
| 552 | return |
| 553 | |
| 554 | if self._address is not None: |
| 555 | data, addr = res, self._address |
| 556 | else: |
| 557 | data, addr = res |
| 558 | |
| 559 | if self._conn_lost: |
| 560 | return |
| 561 | if self._address is not None: |
| 562 | self._read_fut = self._loop._proactor.recv(self._sock, |
| 563 | self.max_size) |
| 564 | else: |
| 565 | self._read_fut = self._loop._proactor.recvfrom(self._sock, |
| 566 | self.max_size) |
| 567 | except OSError as exc: |
| 568 | self._protocol.error_received(exc) |
| 569 | except exceptions.CancelledError: |
| 570 | if not self._closing: |
| 571 | raise |
| 572 | else: |
| 573 | if self._read_fut is not None: |
| 574 | self._read_fut.add_done_callback(self._loop_reading) |
| 575 | finally: |
| 576 | if data: |
| 577 | self._protocol.datagram_received(data, addr) |
| 578 | |
| 579 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 580 | class _ProactorDuplexPipeTransport(_ProactorReadPipeTransport, |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 581 | _ProactorBaseWritePipeTransport, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 582 | transports.Transport): |
| 583 | """Transport for duplex pipes.""" |
| 584 | |
| 585 | def can_write_eof(self): |
| 586 | return False |
| 587 | |
| 588 | def write_eof(self): |
| 589 | raise NotImplementedError |
| 590 | |
| 591 | |
| 592 | class _ProactorSocketTransport(_ProactorReadPipeTransport, |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 593 | _ProactorBaseWritePipeTransport, |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 594 | transports.Transport): |
| 595 | """Transport for connected sockets.""" |
| 596 | |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 597 | _sendfile_compatible = constants._SendfileMode.TRY_NATIVE |
Andrew Svetlov | 7c68407 | 2018-01-27 21:22:47 +0200 | [diff] [blame] | 598 | |
Andrew Svetlov | 3bc0eba | 2018-12-03 21:08:13 +0200 | [diff] [blame] | 599 | def __init__(self, loop, sock, protocol, waiter=None, |
| 600 | extra=None, server=None): |
| 601 | super().__init__(loop, sock, protocol, waiter, extra, server) |
| 602 | base_events._set_nodelay(sock) |
| 603 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 604 | def _set_extra(self, sock): |
Andrew Svetlov | bafd4b5 | 2019-05-28 12:52:15 +0300 | [diff] [blame] | 605 | _set_socket_extra(self, sock) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 606 | |
| 607 | def can_write_eof(self): |
| 608 | return True |
| 609 | |
| 610 | def write_eof(self): |
| 611 | if self._closing or self._eof_written: |
| 612 | return |
| 613 | self._eof_written = True |
| 614 | if self._write_fut is None: |
| 615 | self._sock.shutdown(socket.SHUT_WR) |
| 616 | |
| 617 | |
| 618 | class BaseProactorEventLoop(base_events.BaseEventLoop): |
| 619 | |
| 620 | def __init__(self, proactor): |
| 621 | super().__init__() |
Guido van Rossum | fc29e0f | 2013-10-17 15:39:45 -0700 | [diff] [blame] | 622 | logger.debug('Using proactor: %s', proactor.__class__.__name__) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 623 | self._proactor = proactor |
| 624 | self._selector = proactor # convenient alias |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 625 | self._self_reading_future = None |
| 626 | self._accept_futures = {} # socket file descriptor => Future |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 627 | proactor.set_loop(self) |
| 628 | self._make_self_pipe() |
Vladimir Matveev | b5c8cfa | 2018-12-18 13:56:17 -0800 | [diff] [blame] | 629 | self_no = self._csock.fileno() |
| 630 | signal.set_wakeup_fd(self_no) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 631 | |
| 632 | def _make_socket_transport(self, sock, protocol, waiter=None, |
| 633 | extra=None, server=None): |
| 634 | return _ProactorSocketTransport(self, sock, protocol, waiter, |
| 635 | extra, server) |
| 636 | |
Neil Aspinall | f7686c1 | 2017-12-19 19:45:42 +0000 | [diff] [blame] | 637 | def _make_ssl_transport( |
| 638 | self, rawsock, protocol, sslcontext, waiter=None, |
| 639 | *, server_side=False, server_hostname=None, |
| 640 | extra=None, server=None, |
Andrew Svetlov | 51eb1c6 | 2017-12-20 20:24:43 +0200 | [diff] [blame] | 641 | ssl_handshake_timeout=None): |
Neil Aspinall | f7686c1 | 2017-12-19 19:45:42 +0000 | [diff] [blame] | 642 | ssl_protocol = sslproto.SSLProtocol( |
| 643 | self, protocol, sslcontext, waiter, |
| 644 | server_side, server_hostname, |
| 645 | ssl_handshake_timeout=ssl_handshake_timeout) |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 646 | _ProactorSocketTransport(self, rawsock, ssl_protocol, |
| 647 | extra=extra, server=server) |
| 648 | return ssl_protocol._app_transport |
| 649 | |
Andrew Svetlov | bafd4b5 | 2019-05-28 12:52:15 +0300 | [diff] [blame] | 650 | def _make_datagram_transport(self, sock, protocol, |
| 651 | address=None, waiter=None, extra=None): |
| 652 | return _ProactorDatagramTransport(self, sock, protocol, address, |
| 653 | waiter, extra) |
| 654 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 655 | def _make_duplex_pipe_transport(self, sock, protocol, waiter=None, |
| 656 | extra=None): |
| 657 | return _ProactorDuplexPipeTransport(self, |
| 658 | sock, protocol, waiter, extra) |
| 659 | |
| 660 | def _make_read_pipe_transport(self, sock, protocol, waiter=None, |
| 661 | extra=None): |
| 662 | return _ProactorReadPipeTransport(self, sock, protocol, waiter, extra) |
| 663 | |
| 664 | def _make_write_pipe_transport(self, sock, protocol, waiter=None, |
Victor Stinner | b60e9ca | 2014-01-31 14:18:18 +0100 | [diff] [blame] | 665 | extra=None): |
| 666 | # We want connection_lost() to be called when other end closes |
| 667 | return _ProactorWritePipeTransport(self, |
| 668 | sock, protocol, waiter, extra) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 669 | |
| 670 | def close(self): |
Victor Stinner | 956de69 | 2014-12-26 21:07:52 +0100 | [diff] [blame] | 671 | if self.is_running(): |
Victor Stinner | 4c85ec9 | 2014-12-05 01:43:42 +0100 | [diff] [blame] | 672 | raise RuntimeError("Cannot close a running event loop") |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 673 | if self.is_closed(): |
| 674 | return |
Victor Stinner | b86a968 | 2015-01-13 16:11:19 +0100 | [diff] [blame] | 675 | |
Vladimir Matveev | b5c8cfa | 2018-12-18 13:56:17 -0800 | [diff] [blame] | 676 | signal.set_wakeup_fd(-1) |
Victor Stinner | b86a968 | 2015-01-13 16:11:19 +0100 | [diff] [blame] | 677 | # Call these methods before closing the event loop (before calling |
| 678 | # BaseEventLoop.close), because they can schedule callbacks with |
| 679 | # call_soon(), which is forbidden when the event loop is closed. |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 680 | self._stop_accept_futures() |
| 681 | self._close_self_pipe() |
| 682 | self._proactor.close() |
| 683 | self._proactor = None |
| 684 | self._selector = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 685 | |
Victor Stinner | b86a968 | 2015-01-13 16:11:19 +0100 | [diff] [blame] | 686 | # Close the event loop |
| 687 | super().close() |
| 688 | |
Yury Selivanov | 19a44f6 | 2017-12-14 20:53:26 -0500 | [diff] [blame] | 689 | async def sock_recv(self, sock, n): |
| 690 | return await self._proactor.recv(sock, n) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 691 | |
Yury Selivanov | 19a44f6 | 2017-12-14 20:53:26 -0500 | [diff] [blame] | 692 | async def sock_recv_into(self, sock, buf): |
| 693 | return await self._proactor.recv_into(sock, buf) |
Antoine Pitrou | 525f40d | 2017-10-19 21:46:40 +0200 | [diff] [blame] | 694 | |
Yury Selivanov | 19a44f6 | 2017-12-14 20:53:26 -0500 | [diff] [blame] | 695 | async def sock_sendall(self, sock, data): |
| 696 | return await self._proactor.send(sock, data) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 697 | |
Yury Selivanov | 19a44f6 | 2017-12-14 20:53:26 -0500 | [diff] [blame] | 698 | async def sock_connect(self, sock, address): |
| 699 | return await self._proactor.connect(sock, address) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 700 | |
Yury Selivanov | 19a44f6 | 2017-12-14 20:53:26 -0500 | [diff] [blame] | 701 | async def sock_accept(self, sock): |
| 702 | return await self._proactor.accept(sock) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 703 | |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 704 | async def _sock_sendfile_native(self, sock, file, offset, count): |
| 705 | try: |
| 706 | fileno = file.fileno() |
| 707 | except (AttributeError, io.UnsupportedOperation) as err: |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 708 | raise exceptions.SendfileNotAvailableError("not a regular file") |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 709 | try: |
| 710 | fsize = os.fstat(fileno).st_size |
| 711 | except OSError as err: |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 712 | raise exceptions.SendfileNotAvailableError("not a regular file") |
Andrew Svetlov | a19fb3c | 2018-02-25 19:32:14 +0300 | [diff] [blame] | 713 | blocksize = count if count else fsize |
| 714 | if not blocksize: |
| 715 | return 0 # empty file |
| 716 | |
| 717 | blocksize = min(blocksize, 0xffff_ffff) |
| 718 | end_pos = min(offset + count, fsize) if count else fsize |
| 719 | offset = min(offset, fsize) |
| 720 | total_sent = 0 |
| 721 | try: |
| 722 | while True: |
| 723 | blocksize = min(end_pos - offset, blocksize) |
| 724 | if blocksize <= 0: |
| 725 | return total_sent |
| 726 | await self._proactor.sendfile(sock, file, offset, blocksize) |
| 727 | offset += blocksize |
| 728 | total_sent += blocksize |
| 729 | finally: |
| 730 | if total_sent > 0: |
| 731 | file.seek(offset) |
| 732 | |
| 733 | async def _sendfile_native(self, transp, file, offset, count): |
| 734 | resume_reading = transp.is_reading() |
| 735 | transp.pause_reading() |
| 736 | await transp._make_empty_waiter() |
| 737 | try: |
| 738 | return await self.sock_sendfile(transp._sock, file, offset, count, |
| 739 | fallback=False) |
| 740 | finally: |
| 741 | transp._reset_empty_waiter() |
| 742 | if resume_reading: |
| 743 | transp.resume_reading() |
| 744 | |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 745 | def _close_self_pipe(self): |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 746 | if self._self_reading_future is not None: |
| 747 | self._self_reading_future.cancel() |
| 748 | self._self_reading_future = None |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 749 | self._ssock.close() |
| 750 | self._ssock = None |
| 751 | self._csock.close() |
| 752 | self._csock = None |
| 753 | self._internal_fds -= 1 |
| 754 | |
| 755 | def _make_self_pipe(self): |
| 756 | # A self-socket, really. :-) |
Victor Stinner | a10dc3e | 2017-11-28 11:15:26 +0100 | [diff] [blame] | 757 | self._ssock, self._csock = socket.socketpair() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 758 | self._ssock.setblocking(False) |
| 759 | self._csock.setblocking(False) |
| 760 | self._internal_fds += 1 |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 761 | |
| 762 | def _loop_self_reading(self, f=None): |
| 763 | try: |
| 764 | if f is not None: |
| 765 | f.result() # may raise |
| 766 | f = self._proactor.recv(self._ssock, 4096) |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 767 | except exceptions.CancelledError: |
Victor Stinner | cd0f7f9 | 2015-01-21 23:38:37 +0100 | [diff] [blame] | 768 | # _close_self_pipe() has been called, stop waiting for data |
| 769 | return |
Yury Selivanov | 431b540 | 2019-05-27 14:45:12 +0200 | [diff] [blame] | 770 | except (SystemExit, KeyboardInterrupt): |
| 771 | raise |
| 772 | except BaseException as exc: |
Victor Stinner | cd0f7f9 | 2015-01-21 23:38:37 +0100 | [diff] [blame] | 773 | self.call_exception_handler({ |
| 774 | 'message': 'Error on reading from the event loop self pipe', |
| 775 | 'exception': exc, |
| 776 | 'loop': self, |
| 777 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 778 | else: |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 779 | self._self_reading_future = f |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 780 | f.add_done_callback(self._loop_self_reading) |
| 781 | |
| 782 | def _write_to_self(self): |
Victor Stinner | c9f872b | 2019-01-15 13:58:38 +0100 | [diff] [blame] | 783 | try: |
| 784 | self._csock.send(b'\0') |
| 785 | except OSError: |
| 786 | if self._debug: |
| 787 | logger.debug("Fail to write a null byte into the " |
| 788 | "self-pipe socket", |
| 789 | exc_info=True) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 790 | |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 791 | def _start_serving(self, protocol_factory, sock, |
Neil Aspinall | f7686c1 | 2017-12-19 19:45:42 +0000 | [diff] [blame] | 792 | sslcontext=None, server=None, backlog=100, |
Andrew Svetlov | 51eb1c6 | 2017-12-20 20:24:43 +0200 | [diff] [blame] | 793 | ssl_handshake_timeout=None): |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 794 | |
| 795 | def loop(f=None): |
| 796 | try: |
| 797 | if f is not None: |
| 798 | conn, addr = f.result() |
Victor Stinner | e912e65 | 2014-07-12 03:11:53 +0200 | [diff] [blame] | 799 | if self._debug: |
| 800 | logger.debug("%r got a new connection from %r: %r", |
| 801 | server, addr, conn) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 802 | protocol = protocol_factory() |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 803 | if sslcontext is not None: |
| 804 | self._make_ssl_transport( |
| 805 | conn, protocol, sslcontext, server_side=True, |
Neil Aspinall | f7686c1 | 2017-12-19 19:45:42 +0000 | [diff] [blame] | 806 | extra={'peername': addr}, server=server, |
| 807 | ssl_handshake_timeout=ssl_handshake_timeout) |
Victor Stinner | 231b404 | 2015-01-14 00:19:09 +0100 | [diff] [blame] | 808 | else: |
| 809 | self._make_socket_transport( |
| 810 | conn, protocol, |
| 811 | extra={'peername': addr}, server=server) |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 812 | if self.is_closed(): |
| 813 | return |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 814 | f = self._proactor.accept(sock) |
Yury Selivanov | 569efa2 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 815 | except OSError as exc: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 816 | if sock.fileno() != -1: |
Yury Selivanov | 569efa2 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 817 | self.call_exception_handler({ |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 818 | 'message': 'Accept failed on a socket', |
Yury Selivanov | 569efa2 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 819 | 'exception': exc, |
Yury Selivanov | 8cd5165 | 2019-05-27 15:57:20 +0200 | [diff] [blame] | 820 | 'socket': trsock.TransportSocket(sock), |
Yury Selivanov | 569efa2 | 2014-02-18 18:02:19 -0500 | [diff] [blame] | 821 | }) |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 822 | sock.close() |
Victor Stinner | b261475 | 2014-08-25 23:20:52 +0200 | [diff] [blame] | 823 | elif self._debug: |
| 824 | logger.debug("Accept failed on socket %r", |
| 825 | sock, exc_info=True) |
Andrew Svetlov | 0baa72f | 2018-09-11 10:13:04 -0700 | [diff] [blame] | 826 | except exceptions.CancelledError: |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 827 | sock.close() |
| 828 | else: |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 829 | self._accept_futures[sock.fileno()] = f |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 830 | f.add_done_callback(loop) |
| 831 | |
| 832 | self.call_soon(loop) |
| 833 | |
| 834 | def _process_events(self, event_list): |
Victor Stinner | 70db9e4 | 2015-01-09 21:32:05 +0100 | [diff] [blame] | 835 | # Events are processed in the IocpProactor._poll() method |
| 836 | pass |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 837 | |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 838 | def _stop_accept_futures(self): |
Victor Stinner | 7de2646 | 2014-01-11 00:03:21 +0100 | [diff] [blame] | 839 | for future in self._accept_futures.values(): |
| 840 | future.cancel() |
Victor Stinner | bb2fc5b | 2014-06-10 10:23:10 +0200 | [diff] [blame] | 841 | self._accept_futures.clear() |
| 842 | |
| 843 | def _stop_serving(self, sock): |
Julien Duponchelle | 319c034 | 2017-12-19 13:23:17 +0100 | [diff] [blame] | 844 | future = self._accept_futures.pop(sock.fileno(), None) |
| 845 | if future: |
| 846 | future.cancel() |
Guido van Rossum | 27b7c7e | 2013-10-17 13:40:50 -0700 | [diff] [blame] | 847 | self._proactor._stop_serving(sock) |
| 848 | sock.close() |