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/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/conn/DefaultHttpRoutePlanner.java $
* $Revision: 658785 $
* $Date: 2008-05-21 10:47:40 -0700 (Wed, 21 May 2008) $
*
* ====================================================================
* 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.
* ====================================================================
*
* 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/>.
*
*/
package org.apache.http.impl.conn;
import java.net.InetAddress;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.protocol.HttpContext;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.routing.HttpRoutePlanner;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.params.ConnRouteParams;
/**
* Default implementation of an {@link HttpRoutePlanner}.
* This implementation is based on
* {@link org.apache.http.conn.params.ConnRoutePNames parameters}.
* It will not make use of any Java system properties,
* nor of system or browser proxy settings.
*/
public class DefaultHttpRoutePlanner implements HttpRoutePlanner {
/** The scheme registry. */
protected SchemeRegistry schemeRegistry;
/**
* Creates a new default route planner.
*
* @param schreg the scheme registry
*/
public DefaultHttpRoutePlanner(SchemeRegistry schreg) {
if (schreg == null) {
throw new IllegalArgumentException
("SchemeRegistry must not be null.");
}
schemeRegistry = schreg;
}
// non-javadoc, see interface HttpRoutePlanner
public HttpRoute determineRoute(HttpHost target,
HttpRequest request,
HttpContext context)
throws HttpException {
if (request == null) {
throw new IllegalStateException
("Request must not be null.");
}
// If we have a forced route, we can do without a target.
HttpRoute route =
ConnRouteParams.getForcedRoute(request.getParams());
if (route != null)
return route;
// If we get here, there is no forced route.
// So we need a target to compute a route.
if (target == null) {
throw new IllegalStateException
("Target host must not be null.");
}
final InetAddress local =
ConnRouteParams.getLocalAddress(request.getParams());
final HttpHost proxy =
ConnRouteParams.getDefaultProxy(request.getParams());
final Scheme schm = schemeRegistry.getScheme(target.getSchemeName());
// as it is typically used for TLS/SSL, we assume that
// a layered scheme implies a secure connection
final boolean secure = schm.isLayered();
if (proxy == null) {
route = new HttpRoute(target, local, secure);
} else {
route = new HttpRoute(target, local, proxy, secure);
}
return route;
}
}
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