| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * 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 org.apache.cocoon.selection; |
| |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.avalon.framework.parameters.Parameters; |
| import org.apache.cocoon.environment.ObjectModelHelper; |
| |
| import java.util.Map; |
| |
| /** |
| * Tests a specific browser pattern against the requesting user-agent. |
| * |
| * @version $Id$ |
| */ |
| |
| public class BrowserSelector extends NamedPatternsSelector { |
| |
| public void configure(Configuration conf) throws ConfigurationException { |
| configure(conf, "browser", "name", "useragent"); |
| } |
| |
| public boolean select(String expression, Map objectModel, Parameters parameters) { |
| // Inform proxies that response varies with the user-agent header |
| ObjectModelHelper.getResponse(objectModel).addHeader("Vary", "User-Agent"); |
| |
| // Get the user-agent request header |
| String userAgent = ObjectModelHelper.getRequest(objectModel).getHeader("User-Agent"); |
| if (userAgent == null) { |
| getLogger().debug("No User-Agent header -- failing."); |
| return false; |
| } |
| |
| return checkPatterns(expression, userAgent); |
| } |
| } |