/*
* Copyright (c) 1998-2010 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.dispatch;
import com.caucho.config.ConfigException;
import com.caucho.jsp.Page;
import com.caucho.jsp.QServlet;
import com.caucho.make.AlwaysModified;
import com.caucho.util.L10N;
import com.caucho.util.Log;
import javax.servlet.FilterChain;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Represents the final servlet in a filter chain.
*/
public class PrecompilePageFilterChain implements FilterChain {
private static final Logger log = Log.open(PageFilterChain.class);
private static final L10N L = new L10N(PageFilterChain.class);
private QServlet _servlet;
private ServletContext _servletContext;
/**
* Create the filter chain servlet.
*
* @param servlet the JSP servlet
*/
PrecompilePageFilterChain(QServlet servlet)
{
_servlet = servlet;
}
static FilterChain create(ServletInvocation invocation,
PageFilterChain pageChain)
{
String query = invocation.getQueryString();
if (query == null)
return pageChain;
int p = query.indexOf("jsp_precompile");
if (p < 0)
return pageChain;
String tail = query.substring(p + "jsp_precompile".length());
if (tail.startsWith("=\"true\"") ||
tail.startsWith("=true") ||
! tail.startsWith("=")) {
if (invocation instanceof Invocation) {
Invocation inv = (Invocation) invocation;
inv.setDependency(AlwaysModified.create());
}
return new PrecompilePageFilterChain(pageChain.getServlet());
}
else if (tail.startsWith("=\"false\"") ||
tail.startsWith("=false")) {
// jsp/1910
return pageChain;
}
else
return new ExceptionFilterChain(new ConfigException("jsp_precompile requires a true or false value at '" + tail + "'."));
}
/**
* Sets the servlet context.
*/
public void setServletContext(ServletContext servletContext)
{
_servletContext = servletContext;
}
/**
* Gets the servlet context.
*/
public ServletContext getServletContext()
{
return _servletContext;
}
/**
* Invokes the final servlet at the end of the chain.
*
* @param req the servlet request
* @param res the servlet response
*/
public void doFilter(ServletRequest request, ServletResponse response)
throws ServletException, IOException
{
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
try {
Page page = _servlet.getPage(req, res);
if (page == null) {
res.sendError(res.SC_NOT_FOUND);
return;
}
} catch (Exception e) {
log.log(Level.FINER, e.toString(), e);
throw new ServletException(e);
}
PrintWriter out = res.getWriter();
out.println("Precompiled page.");
}
}