| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.webkit; |
| |
| import android.webkit.CacheManager.CacheResult; |
| import android.webkit.PluginData; |
| import android.webkit.UrlInterceptHandler; |
| |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.Map; |
| |
| public final class UrlInterceptRegistry { |
| |
| private final static String LOGTAG = "intercept"; |
| |
| private static boolean mDisabled = false; |
| |
| private static LinkedList mHandlerList; |
| |
| private static synchronized LinkedList getHandlers() { |
| if(mHandlerList == null) |
| mHandlerList = new LinkedList<UrlInterceptHandler>(); |
| return mHandlerList; |
| } |
| |
| /** |
| * set the flag to control whether url intercept is enabled or disabled |
| * |
| * @param disabled true to disable the cache |
| */ |
| public static synchronized void setUrlInterceptDisabled(boolean disabled) { |
| mDisabled = disabled; |
| } |
| |
| /** |
| * get the state of the url intercept, enabled or disabled |
| * |
| * @return return if it is disabled |
| */ |
| public static synchronized boolean urlInterceptDisabled() { |
| return mDisabled; |
| } |
| |
| /** |
| * Register a new UrlInterceptHandler. This handler will be called |
| * before any that were previously registered. |
| * |
| * @param handler The new UrlInterceptHandler object |
| * @return true if the handler was not previously registered. |
| */ |
| public static synchronized boolean registerHandler( |
| UrlInterceptHandler handler) { |
| if (!getHandlers().contains(handler)) { |
| getHandlers().addFirst(handler); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * Unregister a previously registered UrlInterceptHandler. |
| * |
| * @param handler A previously registered UrlInterceptHandler. |
| * @return true if the handler was found and removed from the list. |
| */ |
| public static synchronized boolean unregisterHandler( |
| UrlInterceptHandler handler) { |
| return getHandlers().remove(handler); |
| } |
| |
| /** |
| * Given an url, returns the CacheResult of the first |
| * UrlInterceptHandler interested, or null if none are. |
| * |
| * @return A CacheResult containing surrogate content. |
| * @Deprecated Use PluginData getPluginData( String url, |
| * Map<String, String> headers) instead. |
| */ |
| @Deprecated |
| public static synchronized CacheResult getSurrogate( |
| String url, Map<String, String> headers) { |
| if (urlInterceptDisabled()) { |
| return null; |
| } |
| Iterator iter = getHandlers().listIterator(); |
| while (iter.hasNext()) { |
| UrlInterceptHandler handler = (UrlInterceptHandler) iter.next(); |
| CacheResult result = handler.service(url, headers); |
| if (result != null) { |
| return result; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Given an url, returns the PluginData of the first |
| * UrlInterceptHandler interested, or null if none are or if |
| * intercepts are disabled. |
| * |
| * @return A PluginData instance containing surrogate content. |
| */ |
| public static synchronized PluginData getPluginData( |
| String url, Map<String, String> headers) { |
| if (urlInterceptDisabled()) { |
| return null; |
| } |
| Iterator iter = getHandlers().listIterator(); |
| while (iter.hasNext()) { |
| UrlInterceptHandler handler = (UrlInterceptHandler) iter.next(); |
| PluginData data = handler.getPluginData(url, headers); |
| if (data != null) { |
| return data; |
| } |
| } |
| return null; |
| } |
| } |