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 16 from grpc._cython import cygrpc as _cygrpc 17 18 19 def 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 34 class 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
