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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 code is based on AOSP /libcore/luni/src/main/java/java/net/ProxySelectorImpl.java
package org.mozilla.gecko.util;
import android.text.TextUtils;
import androidx.annotation.Nullable;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URI;
import java.net.URLConnection;
import java.util.List;
public class ProxySelector {
public static URLConnection openConnectionWithProxy(final URI uri) throws IOException {
final java.net.ProxySelector ps = java.net.ProxySelector.getDefault();
Proxy proxy = Proxy.NO_PROXY;
if (ps != null) {
final List<Proxy> proxies = ps.select(uri);
if (proxies != null && !proxies.isEmpty()) {
proxy = proxies.get(0);
}
}
return uri.toURL().openConnection(proxy);
}
public ProxySelector() {}
public Proxy select(final String scheme, final String host) {
int port = -1;
Proxy proxy = null;
String nonProxyHostsKey = null;
boolean httpProxyOkay = true;
if ("http".equalsIgnoreCase(scheme)) {
port = 80;
nonProxyHostsKey = "http.nonProxyHosts";
proxy = lookupProxy("http.proxyHost", "http.proxyPort", Proxy.Type.HTTP, port);
} else if ("https".equalsIgnoreCase(scheme)) {
port = 443;
nonProxyHostsKey = "https.nonProxyHosts"; // RI doesn't support this
proxy = lookupProxy("https.proxyHost", "https.proxyPort", Proxy.Type.HTTP, port);
} else if ("ftp".equalsIgnoreCase(scheme)) {
port = 80; // not 21 as you might guess
nonProxyHostsKey = "ftp.nonProxyHosts";
proxy = lookupProxy("ftp.proxyHost", "ftp.proxyPort", Proxy.Type.HTTP, port);
} else if ("socket".equalsIgnoreCase(scheme)) {
httpProxyOkay = false;
} else {
return Proxy.NO_PROXY;
}
if (nonProxyHostsKey != null && isNonProxyHost(host, System.getProperty(nonProxyHostsKey))) {
return Proxy.NO_PROXY;
}
if (proxy != null) {
return proxy;
}
if (httpProxyOkay) {
proxy = lookupProxy("proxyHost", "proxyPort", Proxy.Type.HTTP, port);
if (proxy != null) {
return proxy;
}
}
proxy = lookupProxy("socksProxyHost", "socksProxyPort", Proxy.Type.SOCKS, 1080);
if (proxy != null) {
return proxy;
}
return Proxy.NO_PROXY;
}
/** Returns the proxy identified by the {@code hostKey} system property, or null. */
@Nullable
private Proxy lookupProxy(
final String hostKey, final String portKey, final Proxy.Type type, final int defaultPort) {
final String host = System.getProperty(hostKey);
if (TextUtils.isEmpty(host)) {
return null;
}
final int port = getSystemPropertyInt(portKey, defaultPort);
if (port == -1) {
// Port can be -1. See bug 1270529.
return null;
}
return new Proxy(type, InetSocketAddress.createUnresolved(host, port));
}
private int getSystemPropertyInt(final String key, final int defaultValue) {
final String string = System.getProperty(key);
if (string != null) {
try {
return Integer.parseInt(string);
} catch (final NumberFormatException ignored) {
}
}
return defaultValue;
}
/**
* Returns true if the {@code nonProxyHosts} system property pattern exists and matches {@code
* host}.
*/
private boolean isNonProxyHost(final String host, final String nonProxyHosts) {
if (host == null || nonProxyHosts == null) {
return false;
}
// construct pattern
final StringBuilder patternBuilder = new StringBuilder();
for (int i = 0; i < nonProxyHosts.length(); i++) {
final char c = nonProxyHosts.charAt(i);
switch (c) {
case '.':
patternBuilder.append("\\.");
break;
case '*':
patternBuilder.append(".*");
break;
default:
patternBuilder.append(c);
}
}
// check whether the host is the nonProxyHosts.
final String pattern = patternBuilder.toString();
return host.matches(pattern);
}
}
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