/
ProxyServer.java
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/
ProxyServer.java
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package org.apache.maven.plugins.javadoc;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.io.IOException;
import java.net.InetAddress;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.proxy.AsyncProxyServlet;
import org.eclipse.jetty.proxy.ConnectHandler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
/**
* A Proxy server.
*
* @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
* @since 2.6
*/
class ProxyServer
{
private Server proxyServer;
private ServerConnector serverConnector;
/**
* @param proxyServlet the wanted auth proxy servlet
*/
public ProxyServer( AuthAsyncProxyServlet proxyServlet )
{
this( null, 0, proxyServlet );
}
/**
* @param hostName the server name
* @param port the server port
* @param proxyServlet the wanted auth proxy servlet
*/
public ProxyServer( String hostName, int port, AuthAsyncProxyServlet proxyServlet )
{
proxyServer = new Server( );
serverConnector = new ServerConnector( proxyServer );
serverConnector.setHost( InetAddress.getLoopbackAddress().getHostName() );
serverConnector.setReuseAddress( true );
serverConnector.setPort( 0 );
proxyServer.addConnector( serverConnector );
// Setup proxy handler to handle CONNECT methods
ConnectHandler proxy = new ConnectHandler();
proxyServer.setHandler(proxy);
// Setup proxy servlet
ServletContextHandler context = new ServletContextHandler(proxy, "/", true, false);
ServletHolder appServletHolder = new ServletHolder(proxyServlet);
context.addServlet(appServletHolder, "/*");
}
/**
* @return the host name
*/
public String getHostName()
{
return serverConnector.getHost() == null ? InetAddress.getLoopbackAddress().getHostName() : serverConnector.getHost();
}
/**
* @return the host port
*/
public int getPort()
{
return serverConnector.getLocalPort();
}
/**
* @throws Exception if any
*/
public void start()
throws Exception
{
if ( proxyServer != null )
{
proxyServer.start();
}
}
/**
* @throws Exception if any
*/
public void stop()
throws Exception
{
if ( proxyServer != null )
{
proxyServer.stop();
}
proxyServer = null;
}
/**
* A proxy servlet with authentication support.
*/
static class AuthAsyncProxyServlet
extends AsyncProxyServlet
{
private Map<String, String> authentications;
private long sleepTime = 0;
/**
* Constructor for non authentication servlet.
*/
public AuthAsyncProxyServlet()
{
super();
}
/**
* Constructor for authentication servlet.
*
* @param authentications a map of user/password
*/
public AuthAsyncProxyServlet( Map<String, String> authentications )
{
this();
this.authentications = authentications;
}
/**
* Constructor for authentication servlet.
*
* @param authentications a map of user/password
* @param sleepTime a positive time to sleep the service thread (for timeout)
*/
public AuthAsyncProxyServlet( Map<String, String> authentications, long sleepTime )
{
this();
this.authentications = authentications;
this.sleepTime = sleepTime;
}
/** {@inheritDoc} */
@Override
public void service( ServletRequest req, ServletResponse res )
throws ServletException, IOException
{
final HttpServletRequest request = (HttpServletRequest) req;
final HttpServletResponse response = (HttpServletResponse) res;
if ( this.authentications != null && !this.authentications.isEmpty() )
{
String proxyAuthorization = request.getHeader( "Proxy-Authorization" );
if ( proxyAuthorization != null && proxyAuthorization.startsWith( "Basic " ) )
{
String proxyAuth = proxyAuthorization.substring("Basic ".length());
String authorization = new String(Base64.getDecoder().decode(proxyAuth), StandardCharsets.UTF_8);
String[] authTokens = authorization.split( ":" );
String user = authTokens[0];
String password = authTokens[1];
if ( this.authentications.get( user ) == null )
{
throw new IllegalArgumentException( user + " not found in the map!" );
}
if ( sleepTime > 0 )
{
try
{
Thread.sleep( sleepTime );
}
catch ( InterruptedException e )
{
// nop
}
}
String authPass = this.authentications.get(user);
if ( password.equals( authPass ) )
{
// could throw exceptions...
super.service( req, res );
return;
}
}
// Proxy-Authenticate Basic realm="CCProxy Authorization"
response.addHeader( "Proxy-Authenticate", "Basic realm=\"Jetty Proxy Authorization\"" );
response.setStatus( HttpServletResponse.SC_PROXY_AUTHENTICATION_REQUIRED );
return;
}
super.service( req, res );
}
}
}