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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
GroovyServlet.java | 0% | 0% | 0% | 0% |
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/*
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* Copyright 2003 (C) Sam Pullara. All Rights Reserved.
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*
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* Redistribution and use of this software and associated documentation
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* ("Software"), with or without modification, are permitted provided that the
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* following conditions are met: 1. Redistributions of source code must retain
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* copyright statements and notices. Redistributions must also contain a copy
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* of this document. 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution. 3.
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* The name "groovy" must not be used to endorse or promote products derived
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* from this Software without prior written permission of The Codehaus. For
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* written permission, please contact info@codehaus.org. 4. Products derived
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* from this Software may not be called "groovy" nor may "groovy" appear in
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* their names without prior written permission of The Codehaus. "groovy" is a
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* registered trademark of The Codehaus. 5. Due credit should be given to The
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* Codehaus - http://groovy.codehaus.org/
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*
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* THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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package groovy.servlet;
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import groovy.lang.Binding;
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import groovy.lang.MetaClass;
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import groovy.lang.Closure;
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import groovy.util.GroovyScriptEngine;
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import groovy.util.ResourceConnector;
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import groovy.util.ResourceException;
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import groovy.util.ScriptException;
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import java.io.IOException;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Map;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.codehaus.groovy.runtime.GroovyCategorySupport;
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/**
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* This servlet should be registered to *.groovy in the web.xml.
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*
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* <servlet><servlet-name>Groovy</servlet-name><servlet-class>
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* groovy.servlet.GroovyServlet</servlet-class></servlet>
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*
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* <servlet-mapping><servlet-name>Groovy</servlet-name><url-pattern>
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* *.groovy</url-pattern></servlet-mapping>
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*
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* @author Sam Pullara
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*/
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public class GroovyServlet extends HttpServlet implements ResourceConnector { |
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private ServletContext sc;
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private static Map servletCache = Collections.synchronizedMap(new HashMap()); |
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private static ClassLoader parent; |
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private static GroovyScriptEngine gse; |
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public ServletContext getServletContext() {
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return sc;
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} |
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private static class ServletCacheEntry { |
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private Class servletScriptClass;
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private long lastModified; |
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private Map dependencies = new HashMap(); |
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} |
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public void init(ServletConfig config) { |
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// Use reflection, some containers don't load classes properly
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MetaClass.setUseReflection(true);
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// Get the servlet context
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sc = config.getServletContext(); |
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sc.log("Groovy servlet initialized");
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// Ensure that we use the correct classloader so that we can find
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// classes in an application server.
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parent = Thread.currentThread().getContextClassLoader(); |
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if (parent == null) |
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parent = GroovyServlet.class.getClassLoader();
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// Set up the scripting engine
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gse = new GroovyScriptEngine(this); |
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} |
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public URLConnection getResourceConnection(String name) throws ResourceException { |
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try {
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URL url = sc.getResource("/" + name);
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if (url == null) { |
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url = sc.getResource("/WEB-INF/groovy/" + name);
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if (url == null) { |
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throw new ResourceException("Resource " + name + " not found"); |
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} |
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} |
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return url.openConnection();
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} catch (IOException ioe) {
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throw new ResourceException("Problem reading resource " + name); |
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} |
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} |
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public void service(ServletRequest request, ServletResponse response) throws ServletException, IOException { |
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// Convert the generic servlet request and response to their Http
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// versions
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final HttpServletRequest httpRequest = (HttpServletRequest) request; |
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final HttpServletResponse httpResponse = (HttpServletResponse) response; |
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// Get the name of the Groovy script
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int contextLength = httpRequest.getContextPath().length();
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final String scriptFilename = httpRequest.getRequestURI().substring(contextLength).substring(1); |
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// Set up the script context
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final Binding binding = new Binding();
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binding.setVariable("request", httpRequest);
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binding.setVariable("response", httpResponse);
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binding.setVariable("application", sc);
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binding.setVariable("session", httpRequest.getSession(true)); |
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binding.setVariable("out", httpResponse.getWriter());
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// Form parameters. If there are multiple its passed as a list.
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for (Enumeration paramEnum = request.getParameterNames(); paramEnum.hasMoreElements();) {
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String key = (String) paramEnum.nextElement(); |
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if (binding.getVariable(key) == null) { |
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String[] values = request.getParameterValues(key); |
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if (values.length == 1) {
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binding.setVariable(key, values[0]); |
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} else {
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binding.setVariable(key, values); |
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} |
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} |
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} |
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// Set it to HTML by default
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response.setContentType("text/html");
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// Run the script
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try {
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Closure closure = new Closure(gse) {
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public Object call() {
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try {
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return ((GroovyScriptEngine)getDelegate()).run(scriptFilename, binding);
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} catch (ResourceException e) {
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throw new RuntimeException(e); |
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} catch (ScriptException e) {
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throw new RuntimeException(e); |
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} |
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} |
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}; |
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GroovyCategorySupport.use(ServletCategory.class, closure);
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} catch (RuntimeException re) {
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Throwable e = re.getCause(); |
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if (e instanceof ResourceException) { |
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httpResponse.sendError(404); |
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} else {
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if (e != null) { |
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sc.log("An error occurred processing the request", e);
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} else {
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sc.log("An error occurred processing the request", re);
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} |
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httpResponse.sendError(500); |
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} |
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} |
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} |
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} |
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