/*
* File : AbstractServlet.java
* Created : 23-jan-2003 12:03
* By : fbusquets
*
* JClic - Authoring and playing system for educational activities
*
* Copyright (C) 2000 - 2005 Francesc Busquets & Departament
* d'Educacio de la Generalitat de Catalunya
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details (see the LICENSE file).
*/
package edu.xtec.servlet;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import javax.servlet.*;
import javax.servlet.http.*;
/**
*
* @author Francesc Busquets (fbusquets@xtec.cat)
* @version 13.09.17
*/
public abstract class AbstractServlet extends HttpServlet {
public AbstractServlet(){
super();
RequestProcessor.setDirectResources(true);
}
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
Enumeration en=config.getInitParameterNames();
if(en.hasMoreElements()){
Map<String, Object> map=new HashMap<String, Object>();
while(en.hasMoreElements()){
String key=(String)en.nextElement();
String value=(String)config.getInitParameter(key);
}
RequestProcessor.config(map);
}
}
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
RequestProcessor rp=null;
try{
rp=createRP();
if(rp.wantsInputStream())
rp.setInputStream(request.getInputStream());
else {
Map<String, Object> v=new HashMap<String, Object>();
Map parameters=request.getParameterMap();
for(Object k : parameters.keySet()){
v.put((String)k, parameters.get(k));
}
rp.setParams(v);
}
Cookie[] ck=request.getCookies();
if(ck!=null)
for(int i=0; i<ck.length; i++)
rp.setCookie(ck[i].getName(), ck[i].getValue());
Enumeration en=request.getHeaderNames();
Map<String, Object> map=new HashMap<String, Object>();
while(en.hasMoreElements()){
String name=(String)en.nextElement();
Enumeration enh=request.getHeaders(name);
List<String> v=new ArrayList<String>();
while(enh.hasMoreElements())
v.add((String)enh.nextElement());
map.put(name.toLowerCase(), v);
}
rp.setHeaders(map);
rp.init();
if(rp.noCache()){
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
}
List<String[]> v=new ArrayList<String[]>();
rp.header(v);
if(!v.isEmpty()){
Iterator it=v.iterator();
while(it.hasNext() && !response.isCommitted()){
String[] h=(String[])it.next();
if(h[0].equals(RequestProcessor.ERROR)){
int code=Integer.parseInt(h[1]);
response.sendError(code, h[2]);
}
if(h[0].equals(RequestProcessor.REDIRECT)){
response.sendRedirect(h[1]);
break;
}
else if(h[0].equals(RequestProcessor.CONTENT_TYPE))
response.setContentType(h[1]);
else if(h[0].equals(RequestProcessor.CONTENT_LENGTH))
response.setContentLength(Integer.parseInt(h[1]));
else if(h[0].equals(RequestProcessor.EXTRA))
response.setHeader(h[1], h[2]);
else if(h[0].equals(RequestProcessor.COOKIE))
response.addCookie(new Cookie(h[1], h[2]));
}
}
if(!response.isCommitted()){
if(rp.usesWriter()){
java.io.PrintWriter pw=response.getWriter();
rp.process(pw);
try{
pw.flush();
pw.close();
} catch(Exception ex){
// ...
}
} else{
java.io.OutputStream os=response.getOutputStream();
rp.process(os);
try{
os.flush();
os.close();
} catch(Exception ex){
// ...
}
}
}
rp.end();
rp=null;
}
catch(Exception ex){
int errCode = rp!=null && rp.errCode>=0 ? rp.errCode : HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
String errMsg = rp!=null && rp.errMsg!=null ? rp.errMsg : ex.getMessage();
if(!response.isCommitted()){
response.sendError(errCode, errMsg);
}
System.err.println("ERROR "+errCode+": "+errMsg);
ex.printStackTrace(System.err);
}
finally {
if(rp!=null)
rp.end();
}
}
protected abstract RequestProcessor createRP() throws Exception;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
processRequest(request, response);
}
}