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 */ 16package android.core; 17 18import android.test.AndroidTestCase; 19import org.apache.http.util.CharArrayBuffer; 20 21import android.net.http.Headers; 22import android.util.Log; 23import android.webkit.CacheManager; 24import android.webkit.CacheManager.CacheResult; 25 26import java.lang.reflect.Method; 27 28public class HttpHeaderTest extends AndroidTestCase { 29 30 static final String LAST_MODIFIED = "Last-Modified: Fri, 18 Jun 2010 09:56:47 GMT"; 31 static final String CACHE_CONTROL_MAX_AGE = "Cache-Control:max-age=15"; 32 static final String CACHE_CONTROL_PRIVATE = "Cache-Control: private"; 33 static final String CACHE_CONTROL_COMPOUND = "Cache-Control: no-cache, max-age=200000"; 34 static final String CACHE_CONTROL_COMPOUND2 = "Cache-Control: max-age=200000, no-cache"; 35 36 /** 37 * Tests that cache control header supports multiple instances of the header, 38 * according to HTTP specification. 39 * 40 * The HTTP specification states the following about the fields: 41 * Multiple message-header fields with the same field-name MAY be present 42 * in a message if and only if the entire field-value for that header field 43 * is defined as a comma-separated list [i.e., #(values)]. It MUST be 44 * possible to combine the multiple header fields into one "field-name: 45 * field-value" pair, without changing the semantics of the message, by 46 * appending each subsequent field-value to the first, each separated by a 47 * comma. The order in which header fields with the same field-name are 48 * received is therefore significant to the interpretation of the combined 49 * field value, and thus a proxy MUST NOT change the order of these field 50 * values when a message is forwarded. 51 */ 52 public void testCacheControl() throws Exception { 53 Headers h = new Headers(); 54 CharArrayBuffer buffer = new CharArrayBuffer(64); 55 56 buffer.append(CACHE_CONTROL_MAX_AGE); 57 h.parseHeader(buffer); 58 59 buffer.clear(); 60 buffer.append(LAST_MODIFIED); 61 h.parseHeader(buffer); 62 assertEquals("max-age=15", h.getCacheControl()); 63 64 buffer.clear(); 65 buffer.append(CACHE_CONTROL_PRIVATE); 66 h.parseHeader(buffer); 67 assertEquals("max-age=15,private", h.getCacheControl()); 68 } 69 70 // Test that cache behaves correctly when receiving a compund 71 // cache-control statement containing no-cache and max-age argument. 72 // 73 // If a cache control header contains both a max-age arument and 74 // a no-cache argument the max-age argument should be ignored. 75 // The resource can be cached, but a validity check must be done on 76 // every request. Test case checks that the expiry time is 0 for 77 // this item, so item will be validated on subsequent requests. 78 public void testCacheControlMultipleArguments() throws Exception { 79 // get private method CacheManager.parseHeaders() 80 Method m = CacheManager.class.getDeclaredMethod("parseHeaders", 81 new Class[] {int.class, Headers.class, String.class}); 82 m.setAccessible(true); 83 84 // create indata 85 Headers h = new Headers(); 86 CharArrayBuffer buffer = new CharArrayBuffer(64); 87 buffer.append(CACHE_CONTROL_COMPOUND); 88 h.parseHeader(buffer); 89 90 CacheResult c = (CacheResult)m.invoke(null, 200, h, "text/html"); 91 92 // Check that expires is set to 0, to ensure that no-cache has overridden 93 // the max-age argument 94 assertEquals(0, c.getExpires()); 95 96 // check reverse order 97 buffer.clear(); 98 buffer.append(CACHE_CONTROL_COMPOUND2); 99 h.parseHeader(buffer); 100 101 c = (CacheResult)m.invoke(null, 200, h, "text/html"); 102 assertEquals(0, c.getExpires()); 103 } 104} 105