Python util.errno_from_exception方法代码示例

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def read_from_fd(self):
        try:
            chunk = os.read(self.fd, self.read_chunk_size)
        except (IOError, OSError) as e:
            if errno_from_exception(e) in _ERRNO_WOULDBLOCK:
                return None
            elif errno_from_exception(e) == errno.EBADF:
                # If the writing half of a pipe is closed, select will
                # report it as readable but reads will fail with EBADF.
                self.close(exc_info=True)
                return None
            else:
                raise
        if not chunk:
            self.close()
            return None
        return chunk 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_read(self):
        logging.debug('worker {} on read'.format(self.id))
        try:
            data = self.chan.recv(BUF_SIZE)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close()
        else:
            logging.debug('"{}" from {}:{}'.format(data, *self.dst_addr))
            if not data:
                self.close()
                return

            logging.debug('"{}" to {}:{}'.format(data, *self.handler.src_addr))
            try:
                self.handler.write_message(data)
            except tornado.websocket.WebSocketClosedError:
                self.close() 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_write(self):
        logging.debug('worker {} on write'.format(self.id))
        if not self.data_to_dst:
            return

        data = ''.join(self.data_to_dst)
        logging.debug('"{}" to {}:{}'.format(data, *self.dst_addr))

        try:
            sent = self.chan.send(data)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close()
            else:
                self.update_handler(IOLoop.WRITE)
        else:
            self.data_to_dst = []
            data = data[sent:]
            if data:
                self.data_to_dst.append(data)
                self.update_handler(IOLoop.WRITE)
            else:
                self.update_handler(IOLoop.READ) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_read(self):
        logging.debug('worker {} on read'.format(self.id))
        try:
            data = self.chan.recv(BUF_SIZE)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close(reason='chan error on reading')
        else:
            logging.debug('{!r} from {}:{}'.format(data, *self.dst_addr))
            if not data:
                self.close(reason='chan closed')
                return

            logging.debug('{!r} to {}:{}'.format(data, *self.handler.src_addr))
            try:
                self.handler.write_message(data, binary=True)
            except tornado.websocket.WebSocketClosedError:
                self.close(reason='websocket closed') 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_write(self):
        logging.debug('worker {} on write'.format(self.id))
        if not self.data_to_dst:
            return

        data = ''.join(self.data_to_dst)
        logging.debug('{!r} to {}:{}'.format(data, *self.dst_addr))

        try:
            sent = self.chan.send(data)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close(reason='chan error on writing')
            else:
                self.update_handler(IOLoop.WRITE)
        else:
            self.data_to_dst = []
            data = data[sent:]
            if data:
                self.data_to_dst.append(data)
                self.update_handler(IOLoop.WRITE)
            else:
                self.update_handler(IOLoop.READ) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_read(self):
        logging.debug('worker {} on read'.format(self.id))
        try:
            data = self.chan.recv(BUF_SIZE)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close()
        else:
            logging.debug('"{}" from {}'.format(data, self.dst_addr))
            if not data:
                self.close()
                return

            logging.debug('"{}" to {}'.format(data, self.handler.src_addr))
            try:
                self.handler.write_message(data)
            except tornado.websocket.WebSocketClosedError:
                self.close() 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def on_write(self):
        logging.debug('worker {} on write'.format(self.id))
        if not self.data_to_dst:
            return

        data = ''.join(self.data_to_dst)
        logging.debug('"{}" to {}'.format(data, self.dst_addr))

        try:
            sent = self.chan.send(data)
        except (OSError, IOError) as e:
            logging.error(e)
            if errno_from_exception(e) in _ERRNO_CONNRESET:
                self.close()
            else:
                self.update_handler(IOLoop.WRITE)
        else:
            self.data_to_dst = []
            data = data[sent:]
            if data:
                self.data_to_dst.append(data)
                self.update_handler(IOLoop.WRITE)
            else:
                self.update_handler(IOLoop.READ) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def bind_unix_socket(file, mode=0o600, backlog=_DEFAULT_BACKLOG):
        """Creates a listening unix socket.

        If a socket with the given name already exists, it will be deleted.
        If any other file with that name exists, an exception will be
        raised.

        Returns a socket object (not a list of socket objects like
        `bind_sockets`)
        """
        sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
        set_close_exec(sock.fileno())
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        sock.setblocking(0)
        try:
            st = os.stat(file)
        except OSError as err:
            if errno_from_exception(err) != errno.ENOENT:
                raise
        else:
            if stat.S_ISSOCK(st.st_mode):
                os.remove(file)
            else:
                raise ValueError("File %s exists and is not a socket", file)
        sock.bind(file)
        os.chmod(file, mode)
        sock.listen(backlog)
        return sock 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _read_to_buffer(self):
        """Reads from the socket and appends the result to the read buffer.

        Returns the number of bytes read.  Returns 0 if there is nothing
        to read (i.e. the read returns EWOULDBLOCK or equivalent).  On
        error closes the socket and raises an exception.
        """
        while True:
            try:
                chunk = self.read_from_fd()
            except (socket.error, IOError, OSError) as e:
                if errno_from_exception(e) == errno.EINTR:
                    continue
                # ssl.SSLError is a subclass of socket.error
                if self._is_connreset(e):
                    # Treat ECONNRESET as a connection close rather than
                    # an error to minimize log spam  (the exception will
                    # be available on self.error for apps that care).
                    self.close(exc_info=True)
                    return
                self.close(exc_info=True)
                raise
            break
        if chunk is None:
            return 0
        self._read_buffer.append(chunk)
        self._read_buffer_size += len(chunk)
        if self._read_buffer_size > self.max_buffer_size:
            gen_log.error("Reached maximum read buffer size")
            self.close()
            raise StreamBufferFullError("Reached maximum read buffer size")
        return len(chunk) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _is_connreset(self, exc):
        """Return true if exc is ECONNRESET or equivalent.

        May be overridden in subclasses.
        """
        return (isinstance(exc, (socket.error, IOError)) and
                errno_from_exception(exc) in _ERRNO_CONNRESET) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _try_cleanup_process(cls, pid):
        try:
            ret_pid, status = os.waitpid(pid, os.WNOHANG)
        except OSError as e:
            if errno_from_exception(e) == errno.ECHILD:
                return
        if ret_pid == 0:
            return
        assert ret_pid == pid
        subproc = cls._waiting.pop(pid)
        subproc.io_loop.add_callback_from_signal(
            subproc._set_returncode, status) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def bind_unix_socket(
        file: str, mode: int = 0o600, backlog: int = _DEFAULT_BACKLOG
    ) -> socket.socket:
        """Creates a listening unix socket.

        If a socket with the given name already exists, it will be deleted.
        If any other file with that name exists, an exception will be
        raised.

        Returns a socket object (not a list of socket objects like
        `bind_sockets`)
        """
        sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
        set_close_exec(sock.fileno())
        try:
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        except socket.error as e:
            if errno_from_exception(e) != errno.ENOPROTOOPT:
                # Hurd doesn't support SO_REUSEADDR
                raise
        sock.setblocking(False)
        try:
            st = os.stat(file)
        except OSError as err:
            if errno_from_exception(err) != errno.ENOENT:
                raise
        else:
            if stat.S_ISSOCK(st.st_mode):
                os.remove(file)
            else:
                raise ValueError("File %s exists and is not a socket", file)
        sock.bind(file)
        os.chmod(file, mode)
        sock.listen(backlog)
        return sock 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _is_connreset(self, exc: BaseException) -> bool:
        """Return ``True`` if exc is ECONNRESET or equivalent.

        May be overridden in subclasses.
        """
        return (
            isinstance(exc, (socket.error, IOError))
            and errno_from_exception(exc) in _ERRNO_CONNRESET
        ) 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _handle_connect(self) -> None:
        try:
            err = self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
        except socket.error as e:
            # Hurd doesn't allow SO_ERROR for loopback sockets because all
            # errors for such sockets are reported synchronously.
            if errno_from_exception(e) == errno.ENOPROTOOPT:
                err = 0
        if err != 0:
            self.error = socket.error(err, os.strerror(err))
            # IOLoop implementations may vary: some of them return
            # an error state before the socket becomes writable, so
            # in that case a connection failure would be handled by the
            # error path in _handle_events instead of here.
            if self._connect_future is None:
                gen_log.warning(
                    "Connect error on fd %s: %s",
                    self.socket.fileno(),
                    errno.errorcode[err],
                )
            self.close()
            return
        if self._connect_future is not None:
            future = self._connect_future
            self._connect_future = None
            future_set_result_unless_cancelled(future, self)
        self._connecting = False 

# 需要导入模块: from tornado import util [as 别名]
# 或者: from tornado.util import errno_from_exception [as 别名]
def _try_cleanup_process(cls, pid: int) -> None:
        try:
            ret_pid, status = os.waitpid(pid, os.WNOHANG)
        except OSError as e:
            if errno_from_exception(e) == errno.ECHILD:
                return
        if ret_pid == 0:
            return
        assert ret_pid == pid
        subproc = cls._waiting.pop(pid)
        subproc.io_loop.add_callback_from_signal(subproc._set_returncode, status)