1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.net; 18 19 import org.apache.harmony.xnet.provider.jsse.FileClientSessionCache; 20 import org.apache.harmony.xnet.provider.jsse.SSLClientSessionCache; 21 22 import android.content.Context; 23 import android.util.Log; 24 25 import java.io.File; 26 import java.io.IOException; 27 28 /** 29 * File-based cache of established SSL sessions. When re-establishing a 30 * connection to the same server, using an SSL session cache can save some time, 31 * power, and bandwidth by skipping directly to an encrypted stream. 32 * This is a persistent cache which can span executions of the application. 33 * 34 * @see SSLCertificateSocketFactory 35 */ 36 public final class SSLSessionCache { 37 private static final String TAG = "SSLSessionCache"; 38 /* package */ final SSLClientSessionCache mSessionCache; 39 40 /** 41 * Create a session cache using the specified directory. 42 * Individual session entries will be files within the directory. 43 * Multiple instances for the same directory share data internally. 44 * 45 * @param dir to store session files in (created if necessary) 46 * @throws IOException if the cache can't be opened 47 */ 48 public SSLSessionCache(File dir) throws IOException { 49 mSessionCache = FileClientSessionCache.usingDirectory(dir); 50 } 51 52 /** 53 * Create a session cache at the default location for this app. 54 * Multiple instances share data internally. 55 * 56 * @param context for the application 57 */ 58 public SSLSessionCache(Context context) { 59 File dir = context.getDir("sslcache", Context.MODE_PRIVATE); 60 SSLClientSessionCache cache = null; 61 try { 62 cache = FileClientSessionCache.usingDirectory(dir); 63 } catch (IOException e) { 64 Log.w(TAG, "Unable to create SSL session cache in " + dir, e); 65 } 66 mSessionCache = cache; 67 } 68 } 69
