1# Copyright 2018 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14"""gRPC's APIs for TLS Session Resumption support""" 15 16from grpc._cython import cygrpc as _cygrpc 17 18 19def ssl_session_cache_lru(capacity): 20 """Creates an SSLSessionCache with LRU replacement policy 21 22 Args: 23 capacity: Size of the cache 24 25 Returns: 26 An SSLSessionCache with LRU replacement policy that can be passed as a value for 27 the grpc.ssl_session_cache option to a grpc.Channel. SSL session caches are used 28 to store session tickets, which clients can present to resume previous TLS sessions 29 with a server. 30 """ 31 return SSLSessionCache(_cygrpc.SSLSessionCacheLRU(capacity)) 32 33 34class SSLSessionCache(object): 35 """An encapsulation of a session cache used for TLS session resumption. 36 37 Instances of this class can be passed to a Channel as values for the 38 grpc.ssl_session_cache option 39 """ 40 41 def __init__(self, cache): 42 self._cache = cache 43 44 def __int__(self): 45 return int(self._cache) 46