/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed 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 android.net;
import android.annotation.SdkConstant;
import android.annotation.SdkConstant.SdkConstantType;
import android.content.Context;
import android.text.TextUtils;
import android.util.Log;
import org.apache.http.HttpHost;
import java.net.InetSocketAddress;
import java.net.ProxySelector;
import java.net.URI;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A convenience class for accessing the user and default proxy
* settings.
*/
public final class Proxy {
// Set to true to enable extra debugging.
private static final boolean DEBUG = false;
private static final String TAG = "Proxy";
private static final ProxySelector sDefaultProxySelector;
/**
* Used to notify an app that's caching the default connection proxy
* that either the default connection or its proxy has changed.
* The intent will have the following extra value:</p>
* <ul>
* <li><em>EXTRA_PROXY_INFO</em> - The ProxyProperties for the proxy. Non-null,
* though if the proxy is undefined the host string
* will be empty.
* </ul>
*
* <p class="note">This is a protected intent that can only be sent by the system
*/
@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
public static final String PROXY_CHANGE_ACTION = "android.intent.action.PROXY_CHANGE";
/**
* Intent extra included with {@link #PROXY_CHANGE_ACTION} intents.
* It describes the new proxy being used (as a {@link ProxyInfo} object).
*/
public static final String EXTRA_PROXY_INFO = "android.intent.extra.PROXY_INFO";
/** @hide */
public static final int PROXY_VALID = 0;
/** @hide */
public static final int PROXY_HOSTNAME_EMPTY = 1;
/** @hide */
public static final int PROXY_HOSTNAME_INVALID = 2;
/** @hide */
public static final int PROXY_PORT_EMPTY = 3;
/** @hide */
public static final int PROXY_PORT_INVALID = 4;
/** @hide */
public static final int PROXY_EXCLLIST_INVALID = 5;
private static ConnectivityManager sConnectivityManager = null;
// Hostname / IP REGEX validation
// Matches blank input, ips, and domain names
private static final String NAME_IP_REGEX =
"[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*(\\.[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*)*";
private static final String HOSTNAME_REGEXP = "^$|^" + NAME_IP_REGEX + "$";
private static final Pattern HOSTNAME_PATTERN;
private static final String EXCL_REGEX =
"[a-zA-Z0-9*]+(\\-[a-zA-Z0-9*]+)*(\\.[a-zA-Z0-9*]+(\\-[a-zA-Z0-9*]+)*)*";
private static final String EXCLLIST_REGEXP = "^$|^" + EXCL_REGEX + "(," + EXCL_REGEX + ")*$";
private static final Pattern EXCLLIST_PATTERN;
static {
HOSTNAME_PATTERN = Pattern.compile(HOSTNAME_REGEXP);
EXCLLIST_PATTERN = Pattern.compile(EXCLLIST_REGEXP);
sDefaultProxySelector = ProxySelector.getDefault();
}
/**
* Return the proxy object to be used for the URL given as parameter.
* @param ctx A Context used to get the settings for the proxy host.
* @param url A URL to be accessed. Used to evaluate exclusion list.
* @return Proxy (java.net) object containing the host name. If the
* user did not set a hostname it returns the default host.
* A null value means that no host is to be used.
* {@hide}
*/
public static final java.net.Proxy getProxy(Context ctx, String url) {
String host = "";
if ((url != null) && !isLocalHost(host)) {
URI uri = URI.create(url);
ProxySelector proxySelector = ProxySelector.getDefault();
List<java.net.Proxy> proxyList = proxySelector.select(uri);
if (proxyList.size() > 0) {
return proxyList.get(0);
}
}
return java.net.Proxy.NO_PROXY;
}
/**
* Return the proxy host set by the user.
* @param ctx A Context used to get the settings for the proxy host.
* @return String containing the host name. If the user did not set a host
* name it returns the default host. A null value means that no
* host is to be used.
* @deprecated Use standard java vm proxy values to find the host, port
* and exclusion list. This call ignores the exclusion list.
*/
public static final String getHost(Context ctx) {
java.net.Proxy proxy = getProxy(ctx, null);
if (proxy == java.net.Proxy.NO_PROXY) return null;
try {
return ((InetSocketAddress)(proxy.address())).getHostName();
} catch (Exception e) {
return null;
}
}
/**
* Return the proxy port set by the user.
* @param ctx A Context used to get the settings for the proxy port.
* @return The port number to use or -1 if no proxy is to be used.
* @deprecated Use standard java vm proxy values to find the host, port
* and exclusion list. This call ignores the exclusion list.
*/
public static final int getPort(Context ctx) {
java.net.Proxy proxy = getProxy(ctx, null);
if (proxy == java.net.Proxy.NO_PROXY) return -1;
try {
return ((InetSocketAddress)(proxy.address())).getPort();
} catch (Exception e) {
return -1;
}
}
/**
* Return the default proxy host specified by the carrier.
* @return String containing the host name or null if there is no proxy for
* this carrier.
* @deprecated Use standard java vm proxy values to find the host, port and
* exclusion list. This call ignores the exclusion list and no
* longer reports only mobile-data apn-based proxy values.
*/
public static final String getDefaultHost() {
String host = System.getProperty("http.proxyHost");
if (TextUtils.isEmpty(host)) return null;
return host;
}
/**
* Return the default proxy port specified by the carrier.
* @return The port number to be used with the proxy host or -1 if there is
* no proxy for this carrier.
* @deprecated Use standard java vm proxy values to find the host, port and
* exclusion list. This call ignores the exclusion list and no
* longer reports only mobile-data apn-based proxy values.
*/
public static final int getDefaultPort() {
if (getDefaultHost() == null) return -1;
try {
return Integer.parseInt(System.getProperty("http.proxyPort"));
} catch (NumberFormatException e) {
return -1;
}
}
/**
* Returns the preferred proxy to be used by clients. This is a wrapper
* around {@link android.net.Proxy#getHost()}.
*
* @param context the context which will be passed to
* {@link android.net.Proxy#getHost()}
* @param url the target URL for the request
* @note Calling this method requires permission
* android.permission.ACCESS_NETWORK_STATE
* @return The preferred proxy to be used by clients, or null if there
* is no proxy.
* {@hide}
*/
// TODO: Get rid of this method. It's used only in tests.
public static final HttpHost getPreferredHttpHost(Context context,
String url) {
java.net.Proxy prefProxy = getProxy(context, url);
if (prefProxy.equals(java.net.Proxy.NO_PROXY)) {
return null;
} else {
InetSocketAddress sa = (InetSocketAddress)prefProxy.address();
return new HttpHost(sa.getHostName(), sa.getPort(), "http");
}
}
private static final boolean isLocalHost(String host) {
if (host == null) {
return false;
}
try {
if (host != null) {
if (host.equalsIgnoreCase("localhost")) {
return true;
}
if (NetworkUtils.numericToInetAddress(host).isLoopbackAddress()) {
return true;
}
}
} catch (IllegalArgumentException iex) {
}
return false;
}
/**
* Validate syntax of hostname, port and exclusion list entries
* {@hide}
*/
public static int validate(String hostname, String port, String exclList) {
Matcher match = HOSTNAME_PATTERN.matcher(hostname);
Matcher listMatch = EXCLLIST_PATTERN.matcher(exclList);
if (!match.matches()) return PROXY_HOSTNAME_INVALID;
if (!listMatch.matches()) return PROXY_EXCLLIST_INVALID;
if (hostname.length() > 0 && port.length() == 0) return PROXY_PORT_EMPTY;
if (port.length() > 0) {
if (hostname.length() == 0) return PROXY_HOSTNAME_EMPTY;
int portVal = -1;
try {
portVal = Integer.parseInt(port);
} catch (NumberFormatException ex) {
return PROXY_PORT_INVALID;
}
if (portVal <= 0 || portVal > 0xFFFF) return PROXY_PORT_INVALID;
}
return PROXY_VALID;
}
/** @hide */
public static final void setHttpProxySystemProperty(ProxyInfo p) {
String host = null;
String port = null;
String exclList = null;
Uri pacFileUrl = Uri.EMPTY;
if (p != null) {
host = p.getHost();
port = Integer.toString(p.getPort());
exclList = p.getExclusionListAsString();
pacFileUrl = p.getPacFileUrl();
}
setHttpProxySystemProperty(host, port, exclList, pacFileUrl);
}
/** @hide */
public static final void setHttpProxySystemProperty(String host, String port, String exclList,
Uri pacFileUrl) {
if (exclList != null) exclList = exclList.replace(",", "|");
if (false) Log.d(TAG, "setHttpProxySystemProperty :"+host+":"+port+" - "+exclList);
if (host != null) {
System.setProperty("http.proxyHost", host);
System.setProperty("https.proxyHost", host);
} else {
System.clearProperty("http.proxyHost");
System.clearProperty("https.proxyHost");
}
if (port != null) {
System.setProperty("http.proxyPort", port);
System.setProperty("https.proxyPort", port);
} else {
System.clearProperty("http.proxyPort");
System.clearProperty("https.proxyPort");
}
if (exclList != null) {
System.setProperty("http.nonProxyHosts", exclList);
System.setProperty("https.nonProxyHosts", exclList);
} else {
System.clearProperty("http.nonProxyHosts");
System.clearProperty("https.nonProxyHosts");
}
if (!Uri.EMPTY.equals(pacFileUrl)) {
ProxySelector.setDefault(new PacProxySelector());
} else {
ProxySelector.setDefault(sDefaultProxySelector);
}
}
}
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