com.caucho.jsp.QServlet Maven / Gradle / Ivy
Show all versions of resin Show documentation
/*
* Copyright (c) 1998-2018 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 Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp;
import com.caucho.server.http.CauchoRequest;
import com.caucho.server.http.CauchoResponse;
import com.caucho.server.http.RequestAdapter;
import com.caucho.server.http.ResponseAdapter;
import com.caucho.server.webapp.WebApp;
import com.caucho.util.L10N;
import com.caucho.vfs.ClientDisconnectException;
import com.caucho.vfs.JarPath;
import com.caucho.vfs.Path;
import com.caucho.vfs.Vfs;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Base servlet for both JSP and XTP. It's primarily responsible for
* returning the proper error messages when things go wrong.
*
* The manager create the compiled JSP and XTP pages. The manager
* returns a Page object which is actually executed.
*
* @see JspManager
* @see XtpManager
* @see Page
*/
abstract public class QServlet implements Servlet {
static final String COPYRIGHT =
"Copyright(c) 1998-2018 Caucho Technology. All rights reserved.";
private static final Logger log
= Logger.getLogger(QServlet.class.getName());
private static final L10N L = new L10N(QServlet.class);
protected WebApp _webApp;
private PageManager _manager;
private ServletConfig _config;
/**
* Initialize the servlet. If necessary, convert the ServletContext
* to a CauchoWebApp. Also, read the configuration Registry
* it it hasn't been read yet.
*/
public void init(ServletConfig config) throws ServletException
{
ServletContext cxt = config.getServletContext();
_webApp = (WebApp) cxt;
_config = config;
log.finer(config.getServletName() + " init");
}
/**
* JspServlet and XtpServlet will set the PageManager with this method.
*/
protected void setManager(PageManager manager)
{
_manager = manager;
}
protected PageManager getManager()
{
return _manager;
}
/**
* Override the Servlet method to return the generated application.
*/
public ServletContext getServletContext()
{
return _webApp;
}
/**
* Returns the config.
*/
public ServletConfig getServletConfig()
{
return _config;
}
/**
* Returns the init parameter
*/
public String getInitParameter(String name)
{
return _config.getInitParameter(name);
}
/**
* The service method gets the JSP/XTP page and executes it. The
* request and response objects are converted to Caucho objects so
* other servlet runners will produce the same results as the Caucho
* servlet runner.
*/
public void service(ServletRequest req, ServletResponse res)
throws ServletException, IOException
{
CauchoRequest request;
CauchoResponse response;
ResponseAdapter resAdapt = null;
if (req instanceof CauchoRequest)
request = (CauchoRequest) req;
else
request = RequestAdapter.create((HttpServletRequest) req, _webApp);
if (res instanceof CauchoResponse)
response = (CauchoResponse) res;
else {
resAdapt = ResponseAdapter.create((HttpServletResponse) res);
response = resAdapt;
}
Page page = null;
try {
page = getPage(request, response);
if (page == null) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
}
page.service(request, response);
}
catch (JspParseException e) {
if (e.getErrorPage() != null)
forwardErrorPage(request, response, e, e.getErrorPage());
else
throw new ServletException(e);
}
catch (ClientDisconnectException e) {
throw e;
}
catch (Throwable e) {
if (page != null && page.getErrorPage() != null &&
forwardErrorPage(request, response, e, page.getErrorPage())) {
}
else if (e instanceof IOException) {
log.log(Level.FINE, e.toString(), e);
throw (IOException) e;
}
else if (e instanceof ServletException) {
log.log(Level.FINE, e.toString(), e);
throw (ServletException) e;
}
else {
log.log(Level.FINE, e.toString(), e);
throw new ServletException(e);
}
}
if (resAdapt != null) {
resAdapt.close();
ResponseAdapter.free(resAdapt);
}
}
/**
* Creates and returns a new page.
*
* @param request the servlet request
* @param response the servlet response
*
* @return the compiled page
*/
public Page getPage(HttpServletRequest request,
HttpServletResponse response)
throws Exception
{
try {
Page page = getSubPage(request, response);
return page;
}
catch (JspParseException e) {
if (e.getErrorPage() != null) {
if (e.getCause() != null && ! (e instanceof JspLineParseException))
forwardErrorPage(request, response, e.getCause(), e.getErrorPage());
else
forwardErrorPage(request, response, e, e.getErrorPage());
return null;
}
else
throw e;
}
}
/**
* Given a request and response, returns the compiled Page. For example,
* JspManager will return the JspPage and XtpManager will
* return the XtpPage.
*
* @param req servlet request for generating the page.
* @param res servlet response to any needed error messages.
*/
private Page getSubPage(HttpServletRequest req, HttpServletResponse res)
throws Exception
{
CauchoRequest cauchoRequest = null;
initGetPage();
/*
if (! _webApp.isActive())
throw new UnavailableException("JSP compilation unavailable during restart", 10);
*/
if (req instanceof CauchoRequest)
cauchoRequest = (CauchoRequest) req;
String servletPath;
if (cauchoRequest != null)
servletPath = cauchoRequest.getPageServletPath();
else
servletPath = RequestAdapter.getPageServletPath(req);
if (servletPath == null)
servletPath = "/";
String uri;
if (cauchoRequest != null)
uri = cauchoRequest.getPageURI();
else
uri = RequestAdapter.getPageURI(req);
Path appDir = _webApp.getRootDirectory();
String realPath;
Path subcontext;
ServletConfig config = null;
String jspPath = (String) req.getAttribute("caucho.jsp.jsp-file");
if (jspPath != null) {
req.removeAttribute("caucho.jsp.jsp-file");
subcontext = getPagePath(jspPath);
return _manager.getPage(uri, jspPath, subcontext, config);
}
String pathInfo;
if (cauchoRequest != null)
pathInfo = cauchoRequest.getPagePathInfo();
else
pathInfo = RequestAdapter.getPagePathInfo(req);
subcontext = getPagePath(servletPath);
if (subcontext != null)
return _manager.getPage(servletPath, subcontext);
if (pathInfo == null) {
realPath = _webApp.getRealPath(servletPath);
subcontext = appDir.lookupNative(realPath);
return _manager.getPage(servletPath, subcontext);
}
subcontext = getPagePath(servletPath + pathInfo);
if (subcontext != null)
return _manager.getPage(servletPath + pathInfo, subcontext);
// If servlet path exists, can't use pathInfo to lookup servlet,
// because /jsp/WEB-INF would be a security hole
if (servletPath != null && ! servletPath.equals("")) {
// server/0035
throw new FileNotFoundException(L.l("{0} was not found on this server.",
uri));
// return null;
}
subcontext = getPagePath(pathInfo);
if (subcontext != null)
return _manager.getPage(pathInfo, subcontext);
subcontext = getPagePath(uri);
if (subcontext == null)
throw new FileNotFoundException(L.l("{0} was not found on this server.",
uri));
return _manager.getPage(uri, subcontext);
}
private void initGetPage()
{
// marks the listener array as used
_webApp.getJspApplicationContext().getELListenerArray();
}
public Page getPage(String uri, String pageURI, ServletConfig config)
throws Exception
{
Path path = getPagePath(pageURI);
if (path == null)
return null;
return _manager.getPage(uri, pageURI, path, config);
}
/**
* Returns the path to be used as the servlet name.
*/
private Path getPagePath(String pathName)
{
Path rootDir = _webApp.getRootDirectory();
String realPath = _webApp.getRealPath(pathName);
Path path = rootDir.lookupNative(realPath);
if (path.isFile() && path.canRead())
return path;
java.net.URL url;
ClassLoader loader = _webApp.getClassLoader();
if (loader != null) {
url = _webApp.getClassLoader().getResource(pathName);
String name = url != null ? url.toString() : null;
path = null;
if (url != null && (name.endsWith(".jar") || name.endsWith(".zip")))
path = JarPath.create(Vfs.lookup(url.toString())).lookup(pathName);
else if (url != null)
path = Vfs.lookup(url.toString());
if (path != null && path.isFile() && path.canRead())
return path;
}
url = ClassLoader.getSystemResource(pathName);
String name = url != null ? url.toString() : null;
path = null;
if (url != null && (name.endsWith(".jar") || name.endsWith(".zip")))
path = JarPath.create(Vfs.lookup(url.toString())).lookup(pathName);
else if (url != null)
path = Vfs.lookup(url.toString());
if (path != null && path.isFile() && path.canRead())
return path;
else
return null;
}
/**
* Remove the page from any cache.
*/
public void killPage(HttpServletRequest request,
HttpServletResponse response,
Page page)
{
_manager.killPage(request, response, page);
}
/**
* Forwards an error to the proper error page.
*
* @param req the servlet request
* @param res the servlet response
* @param e the exception
* @param errorPage the error page
*/
private boolean forwardErrorPage(HttpServletRequest req,
HttpServletResponse res,
Throwable e, String errorPage)
throws ServletException, IOException
{
req.setAttribute("javax.servlet.jsp.jspException", e);
req.setAttribute(RequestDispatcher.ERROR_EXCEPTION_TYPE, e);
req.setAttribute(RequestDispatcher.ERROR_REQUEST_URI,
req.getRequestURI());
if (res instanceof CauchoResponse) {
CauchoResponse cauchoResponse = (CauchoResponse) res;
cauchoResponse.killCache();
cauchoResponse.setNoCache(true);
}
RequestDispatcher rd = req.getRequestDispatcher(errorPage);
if (rd == null)
return false;
rd.forward(req, res);
return true;
}
public void destroy()
{
_manager.destroy();
log.finer(_config.getServletName() + " destroy");
}
}