src/OpenSSL/SSL.py
def set_npn_select_callback(self, callback):
        """
        Specify a callback function that will be called when a server offers
        Next Protocol Negotiation options.

        :param callback: The callback function.  It will be invoked with two
            arguments: the Connection, and a list of offered protocols as
            bytestrings, e.g. ``[b'http/1.1', b'spdy/2']``.  It should return
            one of those bytestrings, the chosen protocol.

        .. versionadded:: 0.15
        """
        _warn_npn()
        self._npn_select_helper = _NpnSelectHelper(callback)
        self._npn_select_callback = self._npn_select_helper.callback
        _lib.SSL_CTX_set_next_proto_select_cb(
            self._context, self._npn_select_callback, _ffi.NULL)
def set_npn_select_callback(self, callback):
        _warn_npn()
        self._npn_select_helper = _NpnSelectHelper(callback)
        self._npn_select_callback = self._npn_select_helper.callback
        _lib.SSL_CTX_set_next_proto_select_cb(
            self._context, self._npn_select_callback, _ffi.NULL)
def set_npn_select_callback ( self , callback ) : _warn_npn ( ) self . _npn_select_helper = _NpnSelectHelper ( callback ) self . _npn_select_callback = self . _npn_select_helper . callback _lib . SSL_CTX_set_next_proto_select_cb ( self . _context , self . _npn_select_callback , _ffi . NULL )
Specify a callback function that will be called when a server offers
        Next Protocol Negotiation options.

        :param callback: The callback function.  It will be invoked with two
            arguments: the Connection, and a list of offered protocols as
            bytestrings, e.g. ``[b'http/1.1', b'spdy/2']``.  It should return
            one of those bytestrings, the chosen protocol.

        .. versionadded:: 0.15
Specify a callback function that will be called when a server offers Next Protocol Negotiation options .