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import socket import ssl import sys import typing from .._exceptions import ( ConnectError, ConnectTimeout, ExceptionMapping, ReadError, ReadTimeout, WriteError, WriteTimeout, map_exceptions, ) from .._utils import is_socket_readable from .base import NetworkBackend, NetworkStream class SyncStream(NetworkStream): def __init__(self, sock: socket.socket) -> None: self._sock = sock def read(self, max_bytes: int, timeout: typing.Optional[float] = None) -> bytes: exc_map: ExceptionMapping = {socket.timeout: ReadTimeout, OSError: ReadError} with map_exceptions(exc_map): self._sock.settimeout(timeout) return self._sock.recv(max_bytes) def write(self, buffer: bytes, timeout: typing.Optional[float] = None) -> None: if not buffer: return exc_map: ExceptionMapping = {socket.timeout: WriteTimeout, OSError: WriteError} with map_exceptions(exc_map): while buffer: self._sock.settimeout(timeout) n = self._sock.send(buffer) buffer = buffer[n:] def close(self) -> None: self._sock.close() def start_tls( self, ssl_context: ssl.SSLContext, server_hostname: typing.Optional[str] = None, timeout: typing.Optional[float] = None, ) -> NetworkStream: exc_map: ExceptionMapping = { socket.timeout: ConnectTimeout, OSError: ConnectError, } with map_exceptions(exc_map): try: self._sock.settimeout(timeout) sock = ssl_context.wrap_socket( self._sock, server_hostname=server_hostname ) except Exception as exc: # pragma: nocover self.close() raise exc return SyncStream(sock) def get_extra_info(self, info: str) -> typing.Any: if info == "ssl_object" and isinstance(self._sock, ssl.SSLSocket): return self._sock._sslobj # type: ignore if info == "client_addr": return self._sock.getsockname() if info == "server_addr": return self._sock.getpeername() if info == "socket": return self._sock if info == "is_readable": return is_socket_readable(self._sock) return None class SyncBackend(NetworkBackend): def connect_tcp( self, host: str, port: int, timeout: typing.Optional[float] = None, local_address: typing.Optional[str] = None, ) -> NetworkStream: address = (host, port) source_address = None if local_address is None else (local_address, 0) exc_map: ExceptionMapping = { socket.timeout: ConnectTimeout, OSError: ConnectError, } with map_exceptions(exc_map): sock = socket.create_connection( address, timeout, source_address=source_address ) return SyncStream(sock) def connect_unix_socket( self, path: str, timeout: typing.Optional[float] = None ) -> NetworkStream: # pragma: nocover if sys.platform == "win32": raise RuntimeError( "Attempted to connect to a UNIX socket on a Windows system." ) exc_map: ExceptionMapping = { socket.timeout: ConnectTimeout, OSError: ConnectError, } with map_exceptions(exc_map): sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) sock.settimeout(timeout) sock.connect(path) return SyncStream(sock)