mirror of
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133 lines
4.8 KiB
Java
133 lines
4.8 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.impl.conn;
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import java.net.InetSocketAddress;
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import java.net.Proxy;
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import java.net.ProxySelector;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.util.List;
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import ch.boye.httpclientandroidlib.HttpException;
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import ch.boye.httpclientandroidlib.HttpHost;
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import ch.boye.httpclientandroidlib.HttpRequest;
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import ch.boye.httpclientandroidlib.annotation.Immutable;
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import ch.boye.httpclientandroidlib.conn.SchemePortResolver;
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import ch.boye.httpclientandroidlib.protocol.HttpContext;
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/**
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* {@link ch.boye.httpclientandroidlib.conn.routing.HttpRoutePlanner} implementation
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* based on {@link ProxySelector}. By default, this class will pick up
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* the proxy settings of the JVM, either from system properties
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* or from the browser running the application.
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*
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* @since 4.3
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*/
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@Immutable
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public class SystemDefaultRoutePlanner extends DefaultRoutePlanner {
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private final ProxySelector proxySelector;
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public SystemDefaultRoutePlanner(
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final SchemePortResolver schemePortResolver,
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final ProxySelector proxySelector) {
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super(schemePortResolver);
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this.proxySelector = proxySelector != null ? proxySelector : ProxySelector.getDefault();
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}
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public SystemDefaultRoutePlanner(final ProxySelector proxySelector) {
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this(null, proxySelector);
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}
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@Override
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protected HttpHost determineProxy(
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final HttpHost target,
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final HttpRequest request,
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final HttpContext context) throws HttpException {
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final URI targetURI;
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try {
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targetURI = new URI(target.toURI());
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} catch (final URISyntaxException ex) {
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throw new HttpException("Cannot convert host to URI: " + target, ex);
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}
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final List<Proxy> proxies = this.proxySelector.select(targetURI);
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final Proxy p = chooseProxy(proxies);
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HttpHost result = null;
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if (p.type() == Proxy.Type.HTTP) {
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// convert the socket address to an HttpHost
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if (!(p.address() instanceof InetSocketAddress)) {
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throw new HttpException("Unable to handle non-Inet proxy address: " + p.address());
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}
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final InetSocketAddress isa = (InetSocketAddress) p.address();
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// assume default scheme (http)
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result = new HttpHost(getHost(isa), isa.getPort());
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}
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return result;
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}
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private String getHost(final InetSocketAddress isa) {
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//@@@ Will this work with literal IPv6 addresses, or do we
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//@@@ need to wrap these in [] for the string representation?
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//@@@ Having it in this method at least allows for easy workarounds.
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return isa.isUnresolved() ?
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isa.getHostName() : isa.getAddress().getHostAddress();
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}
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private Proxy chooseProxy(final List<Proxy> proxies) {
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Proxy result = null;
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// check the list for one we can use
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for (int i=0; (result == null) && (i < proxies.size()); i++) {
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final Proxy p = proxies.get(i);
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switch (p.type()) {
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case DIRECT:
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case HTTP:
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result = p;
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break;
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case SOCKS:
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// SOCKS hosts are not handled on the route level.
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// The socket may make use of the SOCKS host though.
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break;
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}
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}
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if (result == null) {
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//@@@ log as warning or info that only a socks proxy is available?
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// result can only be null if all proxies are socks proxies
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// socks proxies are not handled on the route planning level
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result = Proxy.NO_PROXY;
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}
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return result;
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}
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}
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