apacheconfig.java

Tomcat 4.1与WebServer集成组件的源代码包.

/*
 * ====================================================================
 *
 * 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. 
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    distribution.
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 * 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.
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 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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package org.apache.ajp.tomcat4.config;

import org.apache.catalina.*;
import java.io.*;
import java.util.*;
import javax.servlet.*;
/* The idea is to keep all configuration in server.xml and
   the normal apache config files. We don't want people to
   touch apache ( or IIS, NES ) config files unless they
   want to and know what they're doing ( better than we do :-).

   One nice feature ( if someone sends it ) would be to
   also edit httpd.conf to add the include.

   We'll generate a number of configuration files - this one
   is trying to generate a native apache config file.

   Some web.xml mappings do not "map" to server configuration - in
   this case we need to fallback to forward all requests to tomcat.

   Ajp14 will add to that the posibility to have tomcat and
   apache on different machines, and many other improvements -
   but this should also work for Ajp12, Ajp13 and Jni.

*/

/**
    Generates automatic apache mod_jk configurations based on
    the Tomcat server.xml settings and the war contexts
    initialized during startup.
    <p>
    This config interceptor is enabled by inserting an ApacheConfig
    <code>Listener</code> in 
    the server.xml file like so:
    <pre>
    * < Server ... >
    *   ...
    *   <Listener className=<b>org.apache.ajp.tomcat4.config.ApacheConfig</b> 
    *       <i>options</i> />
    *   ...
    * < /Server >
    </pre>
    where <i>options</i> can include any of the following attributes:
    <ul>
     <li><b>configHome</b> - default parent directory for the following paths.
                            If not set, this defaults to TOMCAT_HOME. Ignored
                            whenever any of the following paths is absolute.
                             </li>
     <li><b>jkConfig</b> - path to use for writing Apache mod_jk conf file. If
                            not set, defaults to
                            "conf/auto/mod_jk.conf".</li>
     <li><b>workersConfig</b> - path to workers.properties file used by 
                            mod_jk. If not set, defaults to
                            "conf/jk/workers.properties".</li>
     <li><b>modJk</b> - path to Apache mod_jk plugin file.  If not set,
                        defaults to "modules/mod_jk.dll" on windows,
                        "modules/mod_jk.nlm" on netware, and
                        "libexec/mod_jk.so" everywhere else.</li>
     <li><b>jkLog</b> - path to log file to be used by mod_jk.</li>
     <li><b>jkDebug</b> - JK Loglevel setting.  May be debug, info, error, or emerg.
                          If not set, defaults to emerg.</li>
     <li><b>jkWorker</b> The desired worker.  Must be set to one of the workers
                         defined in the workers.properties file. "ajp12", "ajp13"
                         or "inprocess" are the workers found in the default
                         workers.properties file. If not specified, defaults
                         to "ajp13" if an Ajp13Interceptor is in use, otherwise
                         it defaults to "ajp12".</li>
     <li><b>forwardAll</b> - If true, forward all requests to Tomcat. This helps
                             insure that all the behavior configured in the web.xml
                             file functions correctly.  If false, let Apache serve
                             static resources. The default is true.
                             Warning: When false, some configuration in
                             the web.xml may not be duplicated in Apache.
                             Review the mod_jk conf file to see what
                             configuration is actually being set in Apache.</li>
     <li><b>noRoot</b> - If true, the root context is not mapped to
                         Tomcat.  If false and forwardAll is true, all requests
                         to the root context are mapped to Tomcat. If false and
                         forwardAll is false, only JSP and servlets requests to
                         the root context are mapped to Tomcat. When false,
                         to correctly serve Tomcat's root context you must also
                         modify the DocumentRoot setting in Apache's httpd.conf
                         file to point to Tomcat's root context directory.
                         Otherwise some content, such as Apache's index.html,
                         will be served by Apache before mod_jk gets a chance
                         to claim the request and pass it to Tomcat.
                         The default is true.</li>
    </ul>
    <p>
    @author Costin Manolache
    @author Larry Isaacs
    @author Mel Martinez
    @author Bill Barker
 */
public class ApacheConfig  extends BaseJkConfig { 
    
    /** default path to mod_jk .conf location */
    public static final String MOD_JK_CONFIG = "conf/auto/mod_jk.conf";
    /** default path to workers.properties file
	This should be also auto-generated from server.xml.
    */
    public static final String WORKERS_CONFIG = "conf/jk/workers.properties";
    /** default mod_jk log file location */
    public static final String JK_LOG_LOCATION = "logs/mod_jk.log";
    /** default location of mod_jk Apache plug-in. */
    public static final String MOD_JK;
    
    //set up some defaults based on OS type
    static{
        String os = System.getProperty("os.name").toLowerCase();
        if(os.indexOf("windows")>=0){ 
           MOD_JK = "modules/mod_jk.dll";
        }else if(os.indexOf("netware")>=0){
           MOD_JK = "modules/mod_jk.nlm";
        }else{
           MOD_JK = "libexec/mod_jk.so";
        }
    }
    
    private File jkConfig = null;
    private File modJk = null;

    // ssl settings 
    private boolean sslExtract=true;
    private String sslHttpsIndicator="HTTPS";
    private String sslSessionIndicator="SSL_SESSION_ID";
    private String sslCipherIndicator="SSL_CIPHER";
    private String sslCertsIndicator="SSL_CLIENT_CERT";

    Hashtable NamedVirtualHosts=null;
    
    public ApacheConfig() {
    }

    //-------------------- Properties --------------------

    /**
        set the path to the output file for the auto-generated
        mod_jk configuration file.  If this path is relative
        then it will be resolved absolutely against
        the getConfigHome() path.
        <p>
        @param <b>path</b> String path to a file
    */
    public void setJkConfig(String path){
	jkConfig= (path==null)?null:new File(path);
    }

    /**
        set the path to the mod_jk Apache Module
        @param <b>path</b> String path to a file
    */
    public void setModJk(String path){
        modJk=( path==null?null:new File(path));
    }

    /** By default mod_jk is configured to collect SSL information from
	the apache environment and send it to the Tomcat workers. The
	problem is that there are many SSL solutions for Apache and as
	a result the environment variable names may change.

	The following JK related SSL configureation
	can be used to customize mod_jk's SSL behaviour.

	Should mod_jk send SSL information to Tomact (default is On)
    */
    public void setExtractSSL( boolean sslMode ) {
	this.sslExtract=sslMode;
    }

    /** What is the indicator for SSL (default is HTTPS)
     */
    public void setHttpsIndicator( String s ) {
	sslHttpsIndicator=s;
    }

    /**What is the indicator for SSL session (default is SSL_SESSION_ID)
     */
    public void setSessionIndicator( String s ) {
	sslSessionIndicator=s;
    }
    
    /**What is the indicator for client SSL cipher suit (default is SSL_CIPHER)
     */
    public void setCipherIndicator( String s ) {
	sslCipherIndicator=s;
    }

    /** What is the indicator for the client SSL certificated(default
	is SSL_CLIENT_CERT
     */
    public void setCertsIndicator( String s ) {
	sslCertsIndicator=s;
    }

    // -------------------- Initialize/guess defaults --------------------

    /** Initialize defaults for properties that are not set
	explicitely
    */
    protected void initProperties() {
        super.initProperties();

	jkConfig= getConfigFile( jkConfig, configHome, MOD_JK_CONFIG);
	workersConfig=getConfigFile( workersConfig, configHome,
				     WORKERS_CONFIG);
	if( modJk == null )
	    modJk=new File(MOD_JK);
	else
	    modJk=getConfigFile( modJk, configHome, MOD_JK );
	jkLog=getConfigFile( jkLog, configHome, JK_LOG_LOCATION);
    }
    // -------------------- Generate config --------------------
    
    protected PrintWriter getWriter() throws IOException {
	String abJkConfig = jkConfig.getAbsolutePath();
	return new PrintWriter(new FileWriter(abJkConfig, append));
    }
			       

    // -------------------- Config sections  --------------------

    /** Generate the loadModule and general options
     */
    protected boolean generateJkHead(PrintWriter mod_jk)
    {

	mod_jk.println("########## Auto generated on " +  new Date() +
		       "##########" );
	mod_jk.println();

	// Fail if mod_jk not found, let the user know the problem
	// instead of running into problems later.
	if( ! modJk.exists() ) {
	    log( "mod_jk location: " + modJk );
	    log( "Make sure it is installed corectly or " +
		 " set the config location" );
	    log( "Using <Listener className=\""+getClass().getName()+"\"  modJk=\"PATH_TO_MOD_JK.SO_OR_DLL\" />" );
	}
            
	// Verify the file exists !!
	mod_jk.println("<IfModule !mod_jk.c>");
	mod_jk.println("  LoadModule jk_module "+
		       modJk.toString().replace('\\','/'));
	mod_jk.println("</IfModule>");