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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.
*/
package com.squareup.okhttp;
import com.squareup.okhttp.internal.URLFilter;
import libcore.net.NetworkSecurityPolicy;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.Proxy;
import java.net.ResponseCache;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.TimeUnit;
public class HttpHandler extends URLStreamHandler {
private final static List<ConnectionSpec> CLEARTEXT_ONLY =
Collections.singletonList(ConnectionSpec.CLEARTEXT);
private static final CleartextURLFilter CLEARTEXT_FILTER = new CleartextURLFilter();
private final ConfigAwareConnectionPool configAwareConnectionPool =
ConfigAwareConnectionPool.getInstance();
@Override protected URLConnection openConnection(URL url) throws IOException {
return newOkUrlFactory(null /* proxy */).open(url);
}
@Override protected URLConnection openConnection(URL url, Proxy proxy) throws IOException {
if (url == null || proxy == null) {
throw new IllegalArgumentException("url == null || proxy == null");
}
return newOkUrlFactory(proxy).open(url);
}
@Override protected int getDefaultPort() {
return 80;
}
protected OkUrlFactory newOkUrlFactory(Proxy proxy) {
OkUrlFactory okUrlFactory = createHttpOkUrlFactory(proxy);
// For HttpURLConnections created through java.net.URL Android uses a connection pool that
// is aware when the default network changes so that pooled connections are not re-used when
// the default network changes.
okUrlFactory.client().setConnectionPool(configAwareConnectionPool.get());
return okUrlFactory;
}
/**
* Creates an OkHttpClient suitable for creating {@link java.net.HttpURLConnection} instances on
* Android.
*/
// Visible for android.net.Network.
public static OkUrlFactory createHttpOkUrlFactory(Proxy proxy) {
OkHttpClient client = new OkHttpClient();
// Explicitly set the timeouts to infinity.
client.setConnectTimeout(0, TimeUnit.MILLISECONDS);
client.setReadTimeout(0, TimeUnit.MILLISECONDS);
client.setWriteTimeout(0, TimeUnit.MILLISECONDS);
// Set the default (same protocol) redirect behavior. The default can be overridden for
// each instance using HttpURLConnection.setInstanceFollowRedirects().
client.setFollowRedirects(HttpURLConnection.getFollowRedirects());
// Do not permit http -> https and https -> http redirects.
client.setFollowSslRedirects(false);
// Permit cleartext traffic only (this is a handler for HTTP, not for HTTPS).
client.setConnectionSpecs(CLEARTEXT_ONLY);
// When we do not set the Proxy explicitly OkHttp picks up a ProxySelector using
// ProxySelector.getDefault().
if (proxy != null) {
client.setProxy(proxy);
}
// OkHttp requires that we explicitly set the response cache.
OkUrlFactory okUrlFactory = new OkUrlFactory(client);
// Use the installed NetworkSecurityPolicy to determine which requests are permitted over
// http.
OkUrlFactories.setUrlFilter(okUrlFactory, CLEARTEXT_FILTER);
ResponseCache responseCache = ResponseCache.getDefault();
if (responseCache != null) {
AndroidInternal.setResponseCache(okUrlFactory, responseCache);
}
return okUrlFactory;
}
private static final class CleartextURLFilter implements URLFilter {
@Override
public void checkURLPermitted(URL url) throws IOException {
String host = url.getHost();
if (!NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted(host)) {
throw new IOException("Cleartext HTTP traffic to " + host + " not permitted");
}
}
}
}
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