'Inplace decompress in-buffer. Read/write position is moved to 0.'

def _unzip(self):

    self.in_buffer.seek(0)
    d = zlib.decompressobj((16 + zlib.MAX_WBITS))
    self.in_buffer = io.BytesIO(d.decompress(self.in_buffer.read()))
    self.in_buffer.seek(0)
