defaultcmsetter.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

/*
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 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 [e-mail].
 *
 * 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.tomcat.context;

import org.apache.tomcat.core.*;
import org.apache.tomcat.core.Constants;
import org.apache.tomcat.request.*;
import org.apache.tomcat.util.*;
import java.io.*;
import java.net.*;
import java.util.*;
import java.security.*;

import org.apache.tomcat.logging.*;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 * Check ContextManager and set defaults for non-set properties
 *
 * @author [e-mail]
 */
public class DefaultCMSetter extends BaseInterceptor {

    public DefaultCMSetter() {
    }

    public void contextInit( Context ctx)
	throws TomcatException
    {
	setEngineHeader( ctx );


	ctx.addServlet( new ExceptionHandler());
	ctx.addServlet( new StatusHandler());

	// Default status handlers. If already set ( error-page in web.xml )
	// do nothing
        ctx.addServlet( new RedirectHandler());
	if( null==ctx.getErrorPage( "302" )) {
	    ctx.addErrorPage( "302", "tomcat.redirectHandler");
	}
        ctx.addServlet( new NotFoundHandler());
	if( null==ctx.getErrorPage( "404" )) {
	    ctx.addErrorPage( "404", "tomcat.notFoundHandler");
	}
    }

    // -------------------- implementation
    private void setEngineHeader(Context ctx) {
        String engineHeader=ctx.getEngineHeader();

	if( engineHeader==null) {
	    /*
	     * Whoever modifies this needs to check this modification is
	     * ok with the code in com.jsp.runtime.ServletEngine or talk
	     * to akv before you check it in. 
	     */
	    // Default value for engine header
	    // no longer use core.properties - the configuration comes from
	    // server.xml or web.xml - no more properties.
	    StringBuffer sb=new StringBuffer();
	    sb.append(Constants.TOMCAT_NAME).append("/");
	    sb.append(Constants.TOMCAT_VERSION);
	    sb.append(" (").append(Constants.JSP_NAME).append(" ");
	    sb.append(Constants.JSP_VERSION);
	    sb.append("; ").append(Constants.SERVLET_NAME).append(" ");
	    sb.append(Constants.SERVLET_MAJOR).append(".");
	    sb.append(Constants.SERVLET_MINOR);
	    sb.append( "; Java " );
	    sb.append(System.getProperty("java.version")).append("; ");
	    sb.append(System.getProperty("os.name") + " ");
	    sb.append(System.getProperty("os.version") + " ");
	    sb.append(System.getProperty("os.arch") + "; java.vendor=");
	    sb.append(System.getProperty("java.vendor")).append(")");
	    engineHeader=sb.toString();
	}
	ctx.setEngineHeader( engineHeader );
    }

}

class NotFoundHandler extends ServletWrapper {
    static StringManager sm=StringManager.
	getManager("org.apache.tomcat.resources");

    NotFoundHandler() {
	initialized=true;
	internal=true;
	name="tomcat.notFoundHandler";
    }

    public void doService(Request req, Response res)
	throws Exception
    {
	String charset = LocaleToCharsetMap.getCharset(Locale.getDefault());
	if (charset == null || charset.equalsIgnoreCase("ISO-8859-1"))
	    res.setContentType("text/html");
	else
	    res.setContentType("text/html; charset=" + charset);

	String requestURI = (String)req.
	    getAttribute("javax.servlet.include.request_uri");

	if (requestURI == null || res.isIncluded()) {
	    requestURI = req.getRequestURI();
	}

	StringBuffer buf = new StringBuffer();
	buf.append("<head><title>")
	    .append(sm.getString("defaulterrorpage.notfound404"))
	    .append("</title></head>\r\n");
	buf.append("<body><h1>")
	    .append(sm.getString("defaulterrorpage.notfound404"))
	    .append("</h1>\r\n<b>");
	buf.append(sm.getString("defaulterrorpage.originalrequest"))
	    .append("</b> ")
	    .append( RequestUtil.filter(requestURI) );

	if (contextM.getShowDebugInfo()) {
	    if (res.isIncluded()) {
		requestURI = (String)req.
		    getAttribute("javax.servlet.include.request_uri");
	    }
	    if (requestURI != null) {
		buf.append("<br><br>\r\n<b>")
		    .append(sm.getString("defaulterrorpage.notfoundrequest"))
		    .append("</b> ")
		    .append( RequestUtil.filter(requestURI) );
	    }
	}

	buf.append("</body>\r\n");

	String body = buf.toString();

	res.setContentLength(body.length());

	if( res.isUsingStream() ) {
	    ServletOutputStream out = res.getOutputStream();
	    out.print(body);
	    out.flush();
	} else {
	    PrintWriter out = res.getWriter();
	    out.print(body);
	    out.flush();
	}
    }
}

class ExceptionHandler extends ServletWrapper {
    static StringManager sm=StringManager.
	getManager("org.apache.tomcat.resources");

    ExceptionHandler() {
	initialized=true;
	internal=true;
	name="tomcat.exceptionHandler";
    }

    public void doService(Request req, Response res)
	throws Exception
    {
	String msg=(String)req.getAttribute("javax.servlet.error.message");
	String errorURI = res.getErrorURI();
	
	Throwable e= (Throwable)req.
	    getAttribute("tomcat.servlet.error.throwable");
	if( e==null ) {
	    System.out.println("ASSERT: Exception handler without exception");
	    /*DEBUG*/ try {throw new Exception(); } catch(Exception ex) {ex.printStackTrace();}
	    return;
	}

	String charset = LocaleToCharsetMap.getCharset(Locale.getDefault());
	if (charset == null || charset.equalsIgnoreCase("ISO-8859-1"))
	    res.setContentType("text/html");
	else
	    res.setContentType("text/html; charset=" + charset);
	res.setStatus( 500 );
	
	StringBuffer buf = new StringBuffer();
	buf.append("<h1>");
	if( errorURI != null ) {
	    buf.append(sm.getString("defaulterrorpage.includedservlet") ).
		append(" ");
	}  else {
	    buf.append("Error: ");
	}
	
	buf.append( 500 );
	buf.append("</h1>\r\n");