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/*
* 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.tuscany.sca.http.osgi;
import java.io.IOException;
import java.util.StringTokenizer;
import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
/**
* A Servlet request dispatcher that can be used to delegate requests to a
* Servlet registered with the Webapp Servlet host.
*
* @version $Rev$ $Date$
*/
class ServletRequestDispatcher implements RequestDispatcher {
private String servletPath;
private Servlet servlet;
public ServletRequestDispatcher(String mapping, Servlet servlet) {
if (mapping.endsWith("*")) {
mapping = mapping.substring(0, mapping.length()-1);
}
if (mapping.endsWith("/")) {
mapping = mapping.substring(0, mapping.length()-1);
}
this.servletPath = mapping;
this.servlet = servlet;
}
/**
* Returns a request wrapper which will return the correct Servlet path
* and path info.
*
* @param request
* @return
*/
private HttpServletRequest createRequestWrapper(ServletRequest request) {
HttpServletRequest requestWrapper = new HttpServletRequestWrapper((HttpServletRequest)request) {
@Override
public String getServletPath() {
return servletPath;
}
@Override
public String getPathInfo() {
String path = super.getServletPath();
if (path.length() == 0) {
path = super.getPathInfo();
}
// TODO: another context path hack, revisit when context path is sorted out
path = fiddlePath(path, servletPath);
return path;
}
};
return requestWrapper;
}
/**
* Remove any path suffix thats part of the Servlet context path
*/
protected String fiddlePath(String path, String servletPath) {
StringTokenizer st = new StringTokenizer(path, "/");
if (st.countTokens() == 1) {
return path;
}
String root = "";
while (st.hasMoreTokens()){
String s = st.nextToken();
if (servletPath.endsWith((root + "/" + s))) {
root += "/" + s;
} else {
break;
}
}
String fiddlePath = path.substring(root.length());
return fiddlePath;
}
public void forward(ServletRequest request, ServletResponse response) throws ServletException, IOException {
servlet.service(createRequestWrapper(request), response);
}
public void include(ServletRequest request, ServletResponse response) throws ServletException, IOException {
servlet.service(createRequestWrapper(request), response);
}
}
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