| /* |
| * 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 org.apache.http.HttpHost; |
| |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.os.SystemProperties; |
| import android.provider.Settings; |
| import android.util.Log; |
| |
| import java.net.InetAddress; |
| import java.net.URI; |
| import java.net.UnknownHostException; |
| |
| import junit.framework.Assert; |
| |
| /** |
| * A convenience class for accessing the user and default proxy |
| * settings. |
| */ |
| final public class Proxy { |
| |
| // Set to true to enable extra debugging. |
| static final private boolean DEBUG = false; |
| |
| static final public String PROXY_CHANGE_ACTION = |
| "android.intent.action.PROXY_CHANGE"; |
| |
| /** |
| * 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. |
| */ |
| static final public String getHost(Context ctx) { |
| ContentResolver contentResolver = ctx.getContentResolver(); |
| Assert.assertNotNull(contentResolver); |
| String host = Settings.Secure.getString( |
| contentResolver, |
| Settings.Secure.HTTP_PROXY); |
| if (host != null) { |
| int i = host.indexOf(':'); |
| if (i == -1) { |
| if (DEBUG) { |
| Assert.assertTrue(host.length() == 0); |
| } |
| return null; |
| } |
| return host.substring(0, i); |
| } |
| return getDefaultHost(); |
| } |
| |
| /** |
| * 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. |
| */ |
| static final public int getPort(Context ctx) { |
| ContentResolver contentResolver = ctx.getContentResolver(); |
| Assert.assertNotNull(contentResolver); |
| String host = Settings.Secure.getString( |
| contentResolver, |
| Settings.Secure.HTTP_PROXY); |
| if (host != null) { |
| int i = host.indexOf(':'); |
| if (i == -1) { |
| if (DEBUG) { |
| Assert.assertTrue(host.length() == 0); |
| } |
| return -1; |
| } |
| if (DEBUG) { |
| Assert.assertTrue(i < host.length()); |
| } |
| return Integer.parseInt(host.substring(i+1)); |
| } |
| return getDefaultPort(); |
| } |
| |
| /** |
| * 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. |
| */ |
| static final public String getDefaultHost() { |
| String host = SystemProperties.get("net.gprs.http-proxy"); |
| if (host != null) { |
| Uri u = Uri.parse(host); |
| host = u.getHost(); |
| return host; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * 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. |
| */ |
| static final public int getDefaultPort() { |
| String host = SystemProperties.get("net.gprs.http-proxy"); |
| if (host != null) { |
| Uri u = Uri.parse(host); |
| return u.getPort(); |
| } else { |
| return -1; |
| } |
| } |
| |
| /** |
| * Returns the preferred proxy to be used by clients. This is a wrapper |
| * around {@link android.net.Proxy#getHost()}. Currently no proxy will |
| * be returned for localhost or if the active network is Wi-Fi. |
| * |
| * @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} |
| */ |
| static final public HttpHost getPreferredHttpHost(Context context, |
| String url) { |
| if (!isLocalHost(url) && !isNetworkWifi(context)) { |
| final String proxyHost = Proxy.getHost(context); |
| if (proxyHost != null) { |
| return new HttpHost(proxyHost, Proxy.getPort(context), "http"); |
| } |
| } |
| |
| return null; |
| } |
| |
| static final private boolean isLocalHost(String url) { |
| if (url == null) { |
| return false; |
| } |
| |
| try { |
| final URI uri = URI.create(url); |
| final String host = uri.getHost(); |
| if (host != null) { |
| if (host.equalsIgnoreCase("localhost")) { |
| return true; |
| } |
| if (InetAddress.getByName(host).isLoopbackAddress()) { |
| return true; |
| } |
| } |
| } catch (UnknownHostException uex) { |
| // Ignore (INetworkSystem.ipStringToByteArray) |
| } catch (IllegalArgumentException iex) { |
| // Ignore (URI.create) |
| } |
| |
| return false; |
| } |
| |
| static final private boolean isNetworkWifi(Context context) { |
| if (context == null) { |
| return false; |
| } |
| |
| final ConnectivityManager connectivity = (ConnectivityManager) |
| context.getSystemService(Context.CONNECTIVITY_SERVICE); |
| if (connectivity != null) { |
| final NetworkInfo info = connectivity.getActiveNetworkInfo(); |
| if (info != null && |
| info.getType() == ConnectivityManager.TYPE_WIFI) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| }; |