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//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.client.security;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;
import org.eclipse.jetty.client.HttpDestination;
import org.eclipse.jetty.client.HttpEventListenerWrapper;
import org.eclipse.jetty.client.HttpExchange;
import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* SecurityListener
*
* Allow for insertion of security dialog when performing an
* HttpExchange.
*/
public class SecurityListener extends HttpEventListenerWrapper
{
private static final Logger LOG = Log.getLogger(SecurityListener.class);
private HttpDestination _destination;
private HttpExchange _exchange;
private boolean _requestComplete;
private boolean _responseComplete;
private boolean _needIntercept;
private int _attempts = 0; // TODO remember to settle on winning solution
public SecurityListener(HttpDestination destination, HttpExchange ex)
{
// Start of sending events through to the wrapped listener
// Next decision point is the onResponseStatus
super(ex.getEventListener(),true);
_destination=destination;
_exchange=ex;
}
/**
* scrapes an authentication type from the authString
*
* @param authString
* @return the authentication type
*/
protected String scrapeAuthenticationType( String authString )
{
String authType;
if ( authString.indexOf( " " ) == -1 )
{
authType = authString.toString().trim();
}
else
{
String authResponse = authString.toString();
authType = authResponse.substring( 0, authResponse.indexOf( " " ) ).trim();
}
return authType;
}
/**
* scrapes a set of authentication details from the authString
*
* @param authString
* @return the authentication details
*/
protected Map<String, String> scrapeAuthenticationDetails( String authString )
{
Map<String, String> authenticationDetails = new HashMap<String, String>();
authString = authString.substring( authString.indexOf( " " ) + 1, authString.length() );
StringTokenizer strtok = new StringTokenizer( authString, ",");
while ( strtok.hasMoreTokens() )
{
String token = strtok.nextToken();
String[] pair = token.split( "=" );
// authentication details ought to come in two parts, if not then just skip
if ( pair.length == 2 )
{
String itemName = pair[0].trim();
String itemValue = pair[1].trim();
itemValue = StringUtil.unquote( itemValue );
authenticationDetails.put( itemName, itemValue );
}
else
{
LOG.debug("SecurityListener: missed scraping authentication details - " + token );
}
}
return authenticationDetails;
}
@Override
public void onResponseStatus( Buffer version, int status, Buffer reason )
throws IOException
{
if (LOG.isDebugEnabled())
LOG.debug("SecurityListener:Response Status: " + status );
if ( status == HttpStatus.UNAUTHORIZED_401 && _attempts<_destination.getHttpClient().maxRetries())
{
// Let's absorb events until we have done some retries
setDelegatingResponses(false);
_needIntercept = true;
}
else
{
setDelegatingResponses(true);
setDelegatingRequests(true);
_needIntercept = false;
}
super.onResponseStatus(version,status,reason);
}
@Override
public void onResponseHeader( Buffer name, Buffer value )
throws IOException
{
if (LOG.isDebugEnabled())
LOG.debug( "SecurityListener:Header: " + name.toString() + " / " + value.toString() );
if (!isDelegatingResponses())
{
int header = HttpHeaders.CACHE.getOrdinal(name);
switch (header)
{
case HttpHeaders.WWW_AUTHENTICATE_ORDINAL:
// TODO don't hard code this bit.
String authString = value.toString();
String type = scrapeAuthenticationType( authString );
// TODO maybe avoid this map creation
Map<String,String> details = scrapeAuthenticationDetails( authString );
String pathSpec="/"; // TODO work out the real path spec
RealmResolver realmResolver = _destination.getHttpClient().getRealmResolver();
if ( realmResolver == null )
{
break;
}
Realm realm = realmResolver.getRealm( details.get("realm"), _destination, pathSpec ); // TODO work our realm correctly
if ( realm == null )
{
LOG.warn( "Unknown Security Realm: " + details.get("realm") );
}
else if ("digest".equalsIgnoreCase(type))
{
_destination.addAuthorization("/",new DigestAuthentication(realm,details));
}
else if ("basic".equalsIgnoreCase(type))
{
_destination.addAuthorization(pathSpec,new BasicAuthentication(realm));
}
break;
}
}
super.onResponseHeader(name,value);
}
@Override
public void onRequestComplete() throws IOException
{
_requestComplete = true;
if (_needIntercept)
{
if (_requestComplete && _responseComplete)
{
if (LOG.isDebugEnabled())
LOG.debug("onRequestComplete, Both complete: Resending from onResponseComplete "+_exchange);
_responseComplete = false;
_requestComplete = false;
setDelegatingRequests(true);
setDelegatingResponses(true);
_destination.resend(_exchange);
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("onRequestComplete, Response not yet complete onRequestComplete, calling super for "+_exchange);
super.onRequestComplete();
}
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("onRequestComplete, delegating to super with Request complete="+_requestComplete+", response complete="+_responseComplete+" "+_exchange);
super.onRequestComplete();
}
}
@Override
public void onResponseComplete() throws IOException
{
_responseComplete = true;
if (_needIntercept)
{
if (_requestComplete && _responseComplete)
{
if (LOG.isDebugEnabled())
LOG.debug("onResponseComplete, Both complete: Resending from onResponseComplete"+_exchange);
_responseComplete = false;
_requestComplete = false;
setDelegatingResponses(true);
setDelegatingRequests(true);
_destination.resend(_exchange);
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("onResponseComplete, Request not yet complete from onResponseComplete, calling super "+_exchange);
super.onResponseComplete();
}
}
else
{
if (LOG.isDebugEnabled())
LOG.debug("OnResponseComplete, delegating to super with Request complete="+_requestComplete+", response complete="+_responseComplete+" "+_exchange);
super.onResponseComplete();
}
}
@Override
public void onRetry()
{
_attempts++;
setDelegatingRequests(true);
setDelegatingResponses(true);
_requestComplete=false;
_responseComplete=false;
_needIntercept=false;
super.onRetry();
}
}
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