# -*- coding: utf-8 -*- """ backports.makefile ~~~~~~~~~~~~~~~~~~ Backports the Python 3 ``socket.makefile`` method for use with anything that wants to create a "fake" socket object. """ import io from socket import SocketIO def backport_makefile( self, mode="r", buffering=None, encoding=None, errors=None, newline=None ): """ Backport of ``socket.makefile`` from Python 3.5. """ if not set(mode) <= {"r", "w", "b"}: raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,)) writing = "w" in mode reading = "r" in mode or not writing assert reading or writing binary = "b" in mode rawmode = "" if reading: rawmode += "r" if writing: rawmode += "w" raw = SocketIO(self, rawmode) self._makefile_refs += 1 if buffering is None: buffering = -1 if buffering < 0: buffering = io.DEFAULT_BUFFER_SIZE if buffering == 0: if not binary: raise ValueError("unbuffered streams must be binary") return raw if reading and writing: buffer = io.BufferedRWPair(raw, raw, buffering) elif reading: buffer = io.BufferedReader(raw, buffering) else: assert writing buffer = io.BufferedWriter(raw, buffering) if binary: return buffer text = io.TextIOWrapper(buffer, encoding, errors, newline) text.mode = mode return text