/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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.struts2.jasper.tagplugins.jstl.core; | |
import org.apache.struts2.jasper.compiler.tagplugin.TagPlugin; | |
import org.apache.struts2.jasper.compiler.tagplugin.TagPluginContext; | |
public class Redirect implements TagPlugin { | |
public void doTag(TagPluginContext ctxt) { | |
//flag for the existence of the "context" | |
boolean hasContext = ctxt.isAttributeSpecified("context"); | |
//names of the temp variables | |
String urlName = ctxt.getTemporaryVariableName(); | |
String contextName = ctxt.getTemporaryVariableName(); | |
String baseUrlName = ctxt.getTemporaryVariableName(); | |
String resultName = ctxt.getTemporaryVariableName(); | |
String responseName = ctxt.getTemporaryVariableName(); | |
//get context | |
ctxt.generateJavaSource("String " + contextName + " = null;"); | |
if(hasContext){ | |
ctxt.generateJavaSource(contextName + " = "); | |
ctxt.generateAttribute("context"); | |
ctxt.generateJavaSource(";"); | |
} | |
//get the url | |
ctxt.generateJavaSource("String " + urlName + " = "); | |
ctxt.generateAttribute("url"); | |
ctxt.generateJavaSource(";"); | |
//get the raw url according to "url" and "context" | |
ctxt.generateJavaSource("String " + baseUrlName + " = " + | |
"org.apache.struts2.jasper.tagplugins.jstl.Util.resolveUrl(" + urlName + ", " + contextName + ", pageContext);"); | |
ctxt.generateJavaSource("pageContext.setAttribute" + | |
"(\"url_without_param\", " + baseUrlName + ");"); | |
//add params | |
ctxt.generateBody(); | |
ctxt.generateJavaSource("String " + resultName + " = " + | |
"(String)pageContext.getAttribute(\"url_without_param\");"); | |
ctxt.generateJavaSource("pageContext.removeAttribute" + | |
"(\"url_without_param\");"); | |
//get the response object | |
ctxt.generateJavaSource("HttpServletResponse " + responseName + " = " + | |
"((HttpServletResponse) pageContext.getResponse());"); | |
//if the url is relative, encode it | |
ctxt.generateJavaSource("if(!org.apache.struts2.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){"); | |
ctxt.generateJavaSource(" " + resultName + " = " | |
+ responseName + ".encodeRedirectURL(" + resultName + ");"); | |
ctxt.generateJavaSource("}"); | |
//do redirect | |
ctxt.generateJavaSource("try{"); | |
ctxt.generateJavaSource(" " + responseName + ".sendRedirect(" + resultName + ");"); | |
ctxt.generateJavaSource("}catch(java.io.IOException ex){"); | |
ctxt.generateJavaSource(" throw new JspTagException(ex.toString(), ex);"); | |
ctxt.generateJavaSource("}"); | |
} | |
} |