1 /* 2 * Copyright (C) 2007 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.webkit; 18 19 import android.net.http.Headers; 20 import android.text.TextUtils; 21 22 /** 23 * This class is a concrete implementation of StreamLoader that uses a 24 * CacheResult as the source for the stream. The CacheResult stored mimetype 25 * and encoding is added to the HTTP response headers. 26 */ 27 class CacheLoader extends StreamLoader { 28 29 CacheManager.CacheResult mCacheResult; // Content source 30 31 /** 32 * Constructs a CacheLoader for use when loading content from the cache. 33 * 34 * @param loadListener LoadListener to pass the content to 35 * @param result CacheResult used as the source for the content. 36 */ CacheLoader(LoadListener loadListener, CacheManager.CacheResult result)37 CacheLoader(LoadListener loadListener, CacheManager.CacheResult result) { 38 super(loadListener); 39 mCacheResult = result; 40 } 41 42 @Override setupStreamAndSendStatus()43 protected boolean setupStreamAndSendStatus() { 44 mDataStream = mCacheResult.inStream; 45 mContentLength = mCacheResult.contentLength; 46 mLoadListener.status(1, 1, mCacheResult.httpStatusCode, "OK"); 47 return true; 48 } 49 50 @Override buildHeaders(Headers headers)51 protected void buildHeaders(Headers headers) { 52 StringBuilder sb = new StringBuilder(mCacheResult.mimeType); 53 if (!TextUtils.isEmpty(mCacheResult.encoding)) { 54 sb.append(';'); 55 sb.append(mCacheResult.encoding); 56 } 57 headers.setContentType(sb.toString()); 58 59 if (!TextUtils.isEmpty(mCacheResult.location)) { 60 headers.setLocation(mCacheResult.location); 61 } 62 63 if (!TextUtils.isEmpty(mCacheResult.expiresString)) { 64 headers.setExpires(mCacheResult.expiresString); 65 } 66 67 if (!TextUtils.isEmpty(mCacheResult.contentdisposition)) { 68 headers.setContentDisposition(mCacheResult.contentdisposition); 69 } 70 71 if (!TextUtils.isEmpty(mCacheResult.crossDomain)) { 72 headers.setXPermittedCrossDomainPolicies(mCacheResult.crossDomain); 73 } 74 } 75 } 76