ssl_compat.py 文件源码

def _safe_ssl_call(self, suppress_ragged_eofs, call, *args, **kwargs):
        """Wrap the given call with SSL error-trapping."""
        start = time.time()
        while True:
            try:
                return call(*args, **kwargs)
            except (ossl.WantReadError, ossl.WantWriteError):
                # Sleep and try again. This is dangerous, because it means
                # the rest of the stack has no way of differentiating
                # between a "new handshake" error and "client dropped".
                # Note this isn't an endless loop: there's a timeout below.
                time.sleep(self.SSL_RETRY)
            except ossl.Error as e:
                if suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
                    return b''
                raise socket.error(e.args[0])

            if time.time() - start > self.SSL_TIMEOUT:
                raise socket.timeout('timed out')