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A Java library for reading Apache httpd configuration files
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright (C) 2010-2014 Christian Bockermann
*
* This file is part of the jwall.org apache-config library. The apache-config library is
* a parsing library to handle Apache HTTPD configuration files.
*
* More information and documentation for the jwall-tools can be found at
*
* http://www.jwall.org/apache-config
*
* This program 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 3 of the License, or (at your option) any later version.
*
* This program 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. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with this
* program; if not, see
* This class is a wrapper implementation to gain java access to the
* Apache web server. Mainly this class does provide some mechanisms
* to guess the right location of the Apache configuration and the
* associated files and can be used to make calls to the apachectl
* script.
*
* @author Christian Bockermann <[email protected]>
* @version $Id$
*/
public class ApacheLocal implements Apache
{
private static Logger log = Logger.getLogger( ApacheLocal.class.getName() );
/** Globally accessible version information */
static {
System.setProperty("org.apache.httpd.version", "0.1");
}
/** This references an instance that can be shared */
private static Apache sharedInstance = null;
/** This instance contains all references to the config, the control-script, etc. */
ApacheLayout layout = null;
/**
* This constructor will initialize some basic structures by guessing
* the binary location, configuration files, etc.
*/
public ApacheLocal(){
layout = ApacheLayout.guess();
}
/**
* Create a new instance of the Apache controller class by using the settings
* provided within the layout object.
*
* @param layout The settings to be used to control the apache instance.
*/
public ApacheLocal( ApacheLayout layout ){
this.layout = layout;
}
/* (non-Javadoc)
* @see org.apache.httpd.Apache#getHttpdConfig()
*/
public File getHttpdConfig(){
return layout.getHttpdConfig();
}
/* (non-Javadoc)
* @see org.apache.httpd.Apache#start()
*/
public String start() throws ApacheError
{
try {
log.finest("Calling \"" + layout.apachectl + " start\"");
Process p = Runtime.getRuntime().exec( layout.apachectl.getAbsolutePath()+" start");
int ret = p.waitFor();
StringBuffer s = new StringBuffer();
InputStream result;
if( ret != 0 )
result = p.getErrorStream();
else
result = p.getInputStream();
BufferedReader r = new BufferedReader( new InputStreamReader( result ) );
int ch = r.read();
while( ch >= 0 ){
s.append( (char) ch );
ch = r.read();
}
r.close();
if(ret != 0)
throw new ApacheError( s.toString() ); //"Start of apache failed, return_code: "+ret);
log.finest( "ApacheCtl start returned: " + s.toString() );
return s.toString();
} catch (Exception e ){
e.printStackTrace();
throw new ApacheError( e.getMessage() );
}
}
/* (non-Javadoc)
* @see org.apache.httpd.Apache#stop()
*/
public String stop() throws Exception
{
Process p = Runtime.getRuntime().exec( layout.apachectl+" stop");
int ret = p.waitFor();
InputStream result;
if( ret != 0 )
result = p.getErrorStream();
else
result = p.getInputStream();
BufferedReader r = new BufferedReader( new InputStreamReader( result ) );
StringBuffer s = new StringBuffer();
String line = r.readLine();
while( line != null && r.ready() )
s.append( line + "\n" );
r.close();
if(ret != 0)
throw new Exception("Fehler beim Apache-Stop: returnCode="+ret);
log.finest( "ApacheCtl stop returned: " + s.toString() );
return s.toString();
}
/* (non-Javadoc)
* @see org.apache.httpd.Apache#restart()
*/
public void restart() throws Exception
{
if( layout.apachectl.exists() ){
Process p = Runtime.getRuntime().exec(layout.apachectl.getAbsolutePath()+" restart");
int ret = p.waitFor();
InputStream result;
if( ret != 0 )
result = p.getErrorStream();
else
result = p.getInputStream();
BufferedReader r = new BufferedReader( new InputStreamReader( result ) );
StringBuffer s = new StringBuffer();
String line = r.readLine();
while( line != null && r.ready() )
s.append( line + "\n" );
r.close();
if(ret != 0)
throw new Exception("" + s.toString() );
}
}
/* (non-Javadoc)
* @see org.apache.httpd.Apache#configCheck()
*/
public String configCheck() throws Exception {
try {
String exec = layout.httpd.getAbsolutePath() + " -t -DDUMP_VHOSTS";
log.fine( "Executing: " + exec );
Process p = Runtime.getRuntime().exec( exec );
int status = p.waitFor();
InputStream result;
//result = p.getInputStream();
result = p.getErrorStream();
log.fine("return-status: " + status );
BufferedReader r = new BufferedReader( new InputStreamReader( result ) );
StringBuffer s = new StringBuffer();
//int ret = p.waitFor();
boolean b = false; // = ret == 0;
String line = null;
b = false;
do {
line =r.readLine();
if( line != null )
s.append( line + "\n" );
if( line != null && !b ){
b = line.indexOf("Syntax OK") >= 0;
}
} while ( line != null );
return s.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* Return a shared instance of an Apache object.
*
* @return A globally shared instance.
*/
public static Apache getInstance(){
if( sharedInstance == null ){
sharedInstance = new ApacheLocal();
}
return sharedInstance;
}
public static void main( String args[] ) throws Exception{
for( String arg : args ){
if( arg.equalsIgnoreCase( "-v" ) || arg.equals( "--version" ) ){
System.out.print( System.getProperty( "org.apache.httpd.version" ) );
System.err.print( System.getProperty( "org.apache.httpd.version" ) );
System.exit(0);
}
}
Apache web = ApacheLocal.getInstance();
log.info("Checking configuration: " + web.configCheck() );
}
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