Errors that were generated by a throwable in the ErrorDispatcherValue had filters applied properly but those coming from a setStatus (called from within a servlet) are not having filters applied as specfied in the Servlet specification (See SRV.6.2.5 for details).
This patch fixes compliance with the specification.
The file that needs to be updated is:
/home/cvspublic/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/valves/ErrorDispatcherValve.java
The changes are minimal for this fix. Let me know if this is a problem
Greg Murray
--- ErrorDispatcherValve.old Fri Nov 1 13:18:46 2002 +++ ErrorDispatcherValve.java Fri Nov 1 13:14:17 2002 @@ -1,2 +1 @@ -/* * $Header: /home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/valves/ErrorDispatcherValve.java,v 1.3 2002/09/12 00:09:28 amyroh Exp $ * $Revision: 1.3 $ * $Date: 2002/09/12 00:09:28 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999-2001 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowlegement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowlegement may appear in the software itself, * if and wherever such third-party acknowlegements normally appear. * * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * * [Additional notices, if required by prior licensing conditions] * */
package org.apache.catalina.valves;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.HttpRequest;
import org.apache.catalina.HttpResponse;
import org.apache.catalina.Logger;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Valve;
import org.apache.catalina.ValveContext;
import org.apache.catalina.Wrapper;
import org.apache.catalina.deploy.ErrorPage;
import org.apache.catalina.util.RequestUtil;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.core.ApplicationFilterFactory;
/**
* <p>Implementation of a Valve that handles the error dispatch (that is, will
* forward to the appropriate error page if necessary).</p>
*
* <p>This Valve should be attached at the Host level, although it will work
* if attached to a Context.</p>
*
* <p><b>WARNING</b>: This valve is necessary for Servlet API compliance.</p>
*
* @author Remy Maucherat
* @author Craig R. McClanahan
* @version $Revision: 1.3 $ $Date: 2002/09/12 00:09:28 $
*/
public class ErrorDispatcherValve
extends ValveBase {
// ----------------------------------------------------- Instance Variables
/**
* The debugging detail level for this component.
*/
protected int debug = 0;
/**
* The descriptive information related to this implementation.
*/
protected static final String info =
"org.apache.catalina.valves.ErrorDispatcherValve/1.0";
/**
* The StringManager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
// --------------------------------------------------------- Public Methods
/**
* Invoke the next Valve in the sequence. When the invoke returns, check
* the response state, and output an error report is necessary.
*
* @param request The servlet request to be processed
* @param response The servlet response to be created
* @param context The valve context used to invoke the next valve
* in the current processing pipeline
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void invoke(Request request, Response response,
ValveContext context)
throws IOException, ServletException {
// Perform the request
context.invokeNext(request, response);
response.setSuspended(false);
ServletRequest sreq = request.getRequest();
Throwable t = (Throwable) sreq.getAttribute(Globals.EXCEPTION_ATTR);
if (t != null) {
throwable(request, response, t);
} else {
status(request, response);
}
}
/**
* Return a String rendering of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("ErrorDispatcherValve[");
sb.append(container.getName());
sb.append("]");
return (sb.toString());
}
// ------------------------------------------------------ Protected Methods
/**
* Handle the specified Throwable encountered while processing
* the specified Request to produce the specified Response. Any
* exceptions that occur during generation of the exception report are
* logged and swallowed.
*
* @param request The request being processed
* @param response The response being generated
* @param exception The exception that occurred (which possibly wraps
* a root cause exception
*/
protected void throwable(Request request, Response response,
Throwable throwable) {
Context context = request.getContext();
if (context == null)
return;
Throwable realError = throwable;
if (realError instanceof ServletException) {
realError = ((ServletException) realError).getRootCause();
if (realError == null) {
realError = throwable;
}
}
ErrorPage errorPage = findErrorPage(context, realError);
if (errorPage != null) {
response.setAppCommitted(false);
ServletRequest sreq = request.getRequest();
ServletResponse sresp = response.getResponse();
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_REQUEST_PATH_ATTR,
errorPage.getLocation());
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_TYPE_ATTR,
new
Integer(ApplicationFilterFactory.ERROR));
sreq.setAttribute
(Globals.STATUS_CODE_ATTR,
new Integer(HttpServletResponse.SC_INTERNAL_SERVER_ERROR));
sreq.setAttribute(Globals.ERROR_MESSAGE_ATTR,
throwable.getMessage());
sreq.setAttribute(Globals.EXCEPTION_ATTR,
realError);
Wrapper wrapper = request.getWrapper();
if (wrapper != null)
sreq.setAttribute(Globals.SERVLET_NAME_ATTR,
wrapper.getName());
if (sreq instanceof HttpServletRequest)
sreq.setAttribute(Globals.EXCEPTION_PAGE_ATTR,
((HttpServletRequest) sreq).getRequestURI());
sreq.setAttribute(Globals.EXCEPTION_TYPE_ATTR,
realError.getClass());
if (custom(request, response, errorPage)) {
try {
sresp.flushBuffer();
} catch (IOException e) {
log("Exception Processing " + errorPage, e);
}
}
}
}
/**
* Handle the HTTP status code (and corresponding message) generated
* while processing the specified Request to produce the specified
* Response. Any exceptions that occur during generation of the error
* report are logged and swallowed.
*
* @param request The request being processed
* @param response The response being generated
*/
protected void status(Request request, Response response) {
// Do nothing on non-HTTP responses
if (!(response instanceof HttpResponse))
return;
HttpResponse hresponse = (HttpResponse) response;
if (!(response.getResponse() instanceof HttpServletResponse))
return;
int statusCode = hresponse.getStatus();
String message = RequestUtil.filter(hresponse.getMessage());
if (message == null)
message = "";
// Handle a custom error page for this status code
Context context = request.getContext();
if (context == null)
return;
ErrorPage errorPage = context.findErrorPage(statusCode);
if (errorPage != null) {
response.setAppCommitted(false);
ServletRequest sreq = request.getRequest();
ServletResponse sresp = response.getResponse();
sreq.setAttribute(Globals.STATUS_CODE_ATTR,
new Integer(statusCode));
sreq.setAttribute(Globals.ERROR_MESSAGE_ATTR,
message);
- sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_REQUEST_PATH_ATTR,
errorPage.getLocation());
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_TYPE_ATTR,
new
Integer(ApplicationFilterFactory.ERROR));
Wrapper wrapper = request.getWrapper();
if (wrapper != null)
sreq.setAttribute(Globals.SERVLET_NAME_ATTR,
wrapper.getName());
if (sreq instanceof HttpServletRequest)
sreq.setAttribute(Globals.EXCEPTION_PAGE_ATTR,
((HttpServletRequest) sreq).getRequestURI());
if (custom(request, response, errorPage)) {
try {
sresp.flushBuffer();
} catch (IOException e) {
log("Exception Processing " + errorPage, e);
}
}
}
}
/**
* Find and return the ErrorPage instance for the specified exception's
* class, or an ErrorPage instance for the closest superclass for which
* there is such a definition. If no associated ErrorPage instance is
* found, return <code>null</code>.
*
* @param context The Context in which to search
* @param exception The exception for which to find an ErrorPage
*/
protected static ErrorPage findErrorPage
(Context context, Throwable exception) {
if (exception == null)
return (null);
Class clazz = exception.getClass();
String name = clazz.getName();
while (!"java.lang.Object".equals(clazz)) {
ErrorPage errorPage = context.findErrorPage(name);
if (errorPage != null)
return (errorPage);
clazz = clazz.getSuperclass();
if (clazz == null)
break;
name = clazz.getName();
}
return (null);
}
/**
* Handle an HTTP status code or Java exception by forwarding control
* to the location included in the specified errorPage object. It is
* assumed that the caller has already recorded any request attributes
* that are to be forwarded to this page. Return <code>true</code> if
* we successfully utilized the specified error page location, or
* <code>false</code> if the default error report should be rendered.
*
* @param request The request being processed
* @param response The response being generated
* @param errorPage The errorPage directive we are obeying
*/
protected boolean custom(Request request, Response response,
ErrorPage errorPage) {
if (debug >= 1)
log("Processing " + errorPage);
// Validate our current environment
if (!(request instanceof HttpRequest)) {
if (debug >= 1)
log(" Not processing an HTTP request --> default handling");
return (false); // NOTE - Nothing we can do generically
}
HttpServletRequest hreq =
(HttpServletRequest) request.getRequest();
if (!(response instanceof HttpResponse)) {
if (debug >= 1)
log("Not processing an HTTP response --> default handling");
return (false); // NOTE - Nothing we can do generically
}
HttpServletResponse hres =
(HttpServletResponse) response.getResponse();
try {
// Reset the response if possible (else IllegalStateException)
hres.reset();
// Forward control to the specified location
ServletContext servletContext =
request.getContext().getServletContext();
RequestDispatcher rd =
servletContext.getRequestDispatcher(errorPage.getLocation());
rd.forward(hreq, hres);
// If we forward, the response is suspended again
response.setSuspended(false);
// Indicate that we have successfully processed this custom page
return (true);
} catch (Throwable t) {
// Report our failure to process this custom page
log("Exception Processing " + errorPage, t);
return (false);
}
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
*/
protected void log(String message) {
Logger logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message);
else
System.out.println(this.toString() + ": " + message);
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
* @param throwable Associated exception
*/
protected void log(String message, Throwable throwable) {
Logger logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message, throwable);
else {
System.out.println(this.toString() + ": " + message);
throwable.printStackTrace(System.out);
}
}
}
\ No newline at end of file
+/*
* $Header:
/home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/valves/ErrorDispatcherValve.java,v
1.3 2002/09/12 00:09:28 amyroh Exp $
* $Revision: 1.3 $
* $Date: 2002/09/12 00:09:28 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.catalina.valves;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.catalina.Container;
import org.apache.catalina.Context;
import org.apache.catalina.Globals;
import org.apache.catalina.HttpRequest;
import org.apache.catalina.HttpResponse;
import org.apache.catalina.Logger;
import org.apache.catalina.Request;
import org.apache.catalina.Response;
import org.apache.catalina.Valve;
import org.apache.catalina.ValveContext;
import org.apache.catalina.Wrapper;
import org.apache.catalina.deploy.ErrorPage;
import org.apache.catalina.util.RequestUtil;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.core.ApplicationFilterFactory;
/**
* <p>Implementation of a Valve that handles the error dispatch (that is, will
* forward to the appropriate error page if necessary).</p>
*
* <p>This Valve should be attached at the Host level, although it will work
* if attached to a Context.</p>
*
* <p><b>WARNING</b>: This valve is necessary for Servlet API compliance.</p>
*
* @author Remy Maucherat
* @author Craig R. McClanahan
* @version $Revision: 1.3 $ $Date: 2002/09/12 00:09:28 $
*/
public class ErrorDispatcherValve
extends ValveBase {
// ----------------------------------------------------- Instance Variables
/**
* The debugging detail level for this component.
*/
protected int debug = 0;
/**
* The descriptive information related to this implementation.
*/
protected static final String info =
"org.apache.catalina.valves.ErrorDispatcherValve/1.0";
/**
* The StringManager for this package.
*/
protected static StringManager sm =
StringManager.getManager(Constants.Package);
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
// --------------------------------------------------------- Public Methods
/**
* Invoke the next Valve in the sequence. When the invoke returns, check
* the response state, and output an error report is necessary.
*
* @param request The servlet request to be processed
* @param response The servlet response to be created
* @param context The valve context used to invoke the next valve
* in the current processing pipeline
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet error occurs
*/
public void invoke(Request request, Response response,
ValveContext context)
throws IOException, ServletException {
// Perform the request
context.invokeNext(request, response);
response.setSuspended(false);
ServletRequest sreq = request.getRequest();
Throwable t = (Throwable) sreq.getAttribute(Globals.EXCEPTION_ATTR);
if (t != null) {
throwable(request, response, t);
} else {
status(request, response);
}
}
/**
* Return a String rendering of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("ErrorDispatcherValve[");
sb.append(container.getName());
sb.append("]");
return (sb.toString());
}
// ------------------------------------------------------ Protected Methods
/**
* Handle the specified Throwable encountered while processing
* the specified Request to produce the specified Response. Any
* exceptions that occur during generation of the exception report are
* logged and swallowed.
*
* @param request The request being processed
* @param response The response being generated
* @param exception The exception that occurred (which possibly wraps
* a root cause exception
*/
protected void throwable(Request request, Response response,
Throwable throwable) {
Context context = request.getContext();
if (context == null)
return;
Throwable realError = throwable;
if (realError instanceof ServletException) {
realError = ((ServletException) realError).getRootCause();
if (realError == null) {
realError = throwable;
}
}
ErrorPage errorPage = findErrorPage(context, realError);
if (errorPage != null) {
response.setAppCommitted(false);
ServletRequest sreq = request.getRequest();
ServletResponse sresp = response.getResponse();
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_REQUEST_PATH_ATTR,
errorPage.getLocation());
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_TYPE_ATTR,
new
Integer(ApplicationFilterFactory.ERROR));
sreq.setAttribute
(Globals.STATUS_CODE_ATTR,
new Integer(HttpServletResponse.SC_INTERNAL_SERVER_ERROR));
sreq.setAttribute(Globals.ERROR_MESSAGE_ATTR,
throwable.getMessage());
sreq.setAttribute(Globals.EXCEPTION_ATTR,
realError);
Wrapper wrapper = request.getWrapper();
if (wrapper != null)
sreq.setAttribute(Globals.SERVLET_NAME_ATTR,
wrapper.getName());
if (sreq instanceof HttpServletRequest)
sreq.setAttribute(Globals.EXCEPTION_PAGE_ATTR,
((HttpServletRequest) sreq).getRequestURI());
sreq.setAttribute(Globals.EXCEPTION_TYPE_ATTR,
realError.getClass());
if (custom(request, response, errorPage)) {
try {
sresp.flushBuffer();
} catch (IOException e) {
log("Exception Processing " + errorPage, e);
}
}
}
}
/**
* Handle the HTTP status code (and corresponding message) generated
* while processing the specified Request to produce the specified
* Response. Any exceptions that occur during generation of the error
* report are logged and swallowed.
*
* @param request The request being processed
* @param response The response being generated
*/
protected void status(Request request, Response response) {
// Do nothing on non-HTTP responses
if (!(response instanceof HttpResponse))
return;
HttpResponse hresponse = (HttpResponse) response;
if (!(response.getResponse() instanceof HttpServletResponse))
return;
int statusCode = hresponse.getStatus();
String message = RequestUtil.filter(hresponse.getMessage());
if (message == null)
message = "";
// Handle a custom error page for this status code
Context context = request.getContext();
if (context == null)
return;
ErrorPage errorPage = context.findErrorPage(statusCode);
if (errorPage != null) {
response.setAppCommitted(false);
ServletRequest sreq = request.getRequest();
ServletResponse sresp = response.getResponse();
sreq.setAttribute(Globals.STATUS_CODE_ATTR,
new Integer(statusCode));
sreq.setAttribute(Globals.ERROR_MESSAGE_ATTR,
message);
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_REQUEST_PATH_ATTR,
errorPage.getLocation());
sreq.setAttribute(ApplicationFilterFactory.DISPATCHER_TYPE_ATTR,
new
Integer(ApplicationFilterFactory.ERROR));
Wrapper wrapper = request.getWrapper();
if (wrapper != null)
sreq.setAttribute(Globals.SERVLET_NAME_ATTR,
wrapper.getName());
if (sreq instanceof HttpServletRequest)
sreq.setAttribute(Globals.EXCEPTION_PAGE_ATTR,
((HttpServletRequest) sreq).getRequestURI());
if (custom(request, response, errorPage)) {
try {
sresp.flushBuffer();
} catch (IOException e) {
log("Exception Processing " + errorPage, e);
}
}
}
}
/**
* Find and return the ErrorPage instance for the specified exception's
* class, or an ErrorPage instance for the closest superclass for which
* there is such a definition. If no associated ErrorPage instance is
* found, return <code>null</code>.
*
* @param context The Context in which to search
* @param exception The exception for which to find an ErrorPage
*/
protected static ErrorPage findErrorPage
(Context context, Throwable exception) {
if (exception == null)
return (null);
Class clazz = exception.getClass();
String name = clazz.getName();
while (!"java.lang.Object".equals(clazz)) {
ErrorPage errorPage = context.findErrorPage(name);
if (errorPage != null)
return (errorPage);
clazz = clazz.getSuperclass();
if (clazz == null)
break;
name = clazz.getName();
}
return (null);
}
/**
* Handle an HTTP status code or Java exception by forwarding control
* to the location included in the specified errorPage object. It is
* assumed that the caller has already recorded any request attributes
* that are to be forwarded to this page. Return <code>true</code> if
* we successfully utilized the specified error page location, or
* <code>false</code> if the default error report should be rendered.
*
* @param request The request being processed
* @param response The response being generated
* @param errorPage The errorPage directive we are obeying
*/
protected boolean custom(Request request, Response response,
ErrorPage errorPage) {
if (debug >= 1)
log("Processing " + errorPage);
// Validate our current environment
if (!(request instanceof HttpRequest)) {
if (debug >= 1)
log(" Not processing an HTTP request --> default handling");
return (false); // NOTE - Nothing we can do generically
}
HttpServletRequest hreq =
(HttpServletRequest) request.getRequest();
if (!(response instanceof HttpResponse)) {
if (debug >= 1)
log("Not processing an HTTP response --> default handling");
return (false); // NOTE - Nothing we can do generically
}
HttpServletResponse hres =
(HttpServletResponse) response.getResponse();
try {
// Reset the response if possible (else IllegalStateException)
hres.reset();
// Forward control to the specified location
ServletContext servletContext =
request.getContext().getServletContext();
RequestDispatcher rd =
servletContext.getRequestDispatcher(errorPage.getLocation());
rd.forward(hreq, hres);
// If we forward, the response is suspended again
response.setSuspended(false);
// Indicate that we have successfully processed this custom page
return (true);
} catch (Throwable t) {
// Report our failure to process this custom page
log("Exception Processing " + errorPage, t);
return (false);
}
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
*/
protected void log(String message) {
Logger logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message);
else
System.out.println(this.toString() + ": " + message);
}
/**
* Log a message on the Logger associated with our Container (if any).
*
* @param message Message to be logged
* @param throwable Associated exception
*/
protected void log(String message, Throwable throwable) {
Logger logger = container.getLogger();
if (logger != null)
logger.log(this.toString() + ": " + message, throwable);
else {
System.out.println(this.toString() + ": " + message);
throwable.printStackTrace(System.out);
}
}
}
\ No newline at end of file
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