def makefile(
        self, mode="r", buffering=None, encoding=None, errors=None, newline=None
    ):
        """
        Python's httpclient uses makefile and buffered io when reading HTTP
        messages and we need to support it.

        This is unfortunately a copy and paste of socket.py makefile with small
        changes to point to the socket directly.
        """
        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 = socket.SocketIO(self, rawmode)
        self.socket._io_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

        Python's httpclient uses makefile and buffered io when reading HTTP
        messages and we need to support it.

        This is unfortunately a copy and paste of socket.py makefile with small
        changes to point to the socket directly.
        
lib/urllib3/util/ssltransport.py