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/*
* ====================================================================
* 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 ch.boye.httpclientandroidlib.impl.conn;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import ch.boye.httpclientandroidlib.HttpException;
import ch.boye.httpclientandroidlib.HttpHost;
import ch.boye.httpclientandroidlib.HttpRequest;
import ch.boye.httpclientandroidlib.annotation.Immutable;
import ch.boye.httpclientandroidlib.conn.SchemePortResolver;
import ch.boye.httpclientandroidlib.protocol.HttpContext;
/**
* {@link ch.boye.httpclientandroidlib.conn.routing.HttpRoutePlanner} implementation
* based on {@link ProxySelector}. By default, this class will pick up
* the proxy settings of the JVM, either from system properties
* or from the browser running the application.
*
* @since 4.3
*/
@Immutable
public class SystemDefaultRoutePlanner extends DefaultRoutePlanner {
private final ProxySelector proxySelector;
public SystemDefaultRoutePlanner(
final SchemePortResolver schemePortResolver,
final ProxySelector proxySelector) {
super(schemePortResolver);
this.proxySelector = proxySelector != null ? proxySelector : ProxySelector.getDefault();
}
public SystemDefaultRoutePlanner(final ProxySelector proxySelector) {
this(null, proxySelector);
}
@Override
protected HttpHost determineProxy(
final HttpHost target,
final HttpRequest request,
final HttpContext context) throws HttpException {
final URI targetURI;
try {
targetURI = new URI(target.toURI());
} catch (final URISyntaxException ex) {
throw new HttpException("Cannot convert host to URI: " + target, ex);
}
final List<Proxy> proxies = this.proxySelector.select(targetURI);
final Proxy p = chooseProxy(proxies);
HttpHost result = null;
if (p.type() == Proxy.Type.HTTP) {
// convert the socket address to an HttpHost
if (!(p.address() instanceof InetSocketAddress)) {
throw new HttpException("Unable to handle non-Inet proxy address: " + p.address());
}
final InetSocketAddress isa = (InetSocketAddress) p.address();
// assume default scheme (http)
result = new HttpHost(getHost(isa), isa.getPort());
}
return result;
}
private String getHost(final InetSocketAddress isa) {
//@@@ Will this work with literal IPv6 addresses, or do we
//@@@ need to wrap these in [] for the string representation?
//@@@ Having it in this method at least allows for easy workarounds.
return isa.isUnresolved() ?
isa.getHostName() : isa.getAddress().getHostAddress();
}
private Proxy chooseProxy(final List<Proxy> proxies) {
Proxy result = null;
// check the list for one we can use
for (int i=0; (result == null) && (i < proxies.size()); i++) {
final Proxy p = proxies.get(i);
switch (p.type()) {
case DIRECT:
case HTTP:
result = p;
break;
case SOCKS:
// SOCKS hosts are not handled on the route level.
// The socket may make use of the SOCKS host though.
break;
}
}
if (result == null) {
//@@@ log as warning or info that only a socks proxy is available?
// result can only be null if all proxies are socks proxies
// socks proxies are not handled on the route planning level
result = Proxy.NO_PROXY;
}
return result;
}
}
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