1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.net; 18 19 import android.annotation.SdkConstant; 20 import android.annotation.SdkConstant.SdkConstantType; 21 import android.content.Context; 22 import android.text.TextUtils; 23 import android.util.Log; 24 25 26 import org.apache.http.HttpHost; 27 import org.apache.http.HttpRequest; 28 import org.apache.http.conn.routing.HttpRoute; 29 import org.apache.http.conn.routing.HttpRoutePlanner; 30 import org.apache.http.conn.scheme.SchemeRegistry; 31 import org.apache.http.protocol.HttpContext; 32 33 import java.net.InetSocketAddress; 34 import java.net.ProxySelector; 35 import java.net.URI; 36 import java.util.List; 37 import java.util.regex.Matcher; 38 import java.util.regex.Pattern; 39 40 /** 41 * A convenience class for accessing the user and default proxy 42 * settings. 43 */ 44 public final class Proxy { 45 46 // Set to true to enable extra debugging. 47 private static final boolean DEBUG = false; 48 private static final String TAG = "Proxy"; 49 50 private static final ProxySelector sDefaultProxySelector; 51 52 /** 53 * Used to notify an app that's caching the default connection proxy 54 * that either the default connection or its proxy has changed. 55 * The intent will have the following extra value:</p> 56 * <ul> 57 * <li><em>EXTRA_PROXY_INFO</em> - The ProxyProperties for the proxy. Non-null, 58 * though if the proxy is undefined the host string 59 * will be empty. 60 * </ul> 61 * 62 * <p class="note">This is a protected intent that can only be sent by the system 63 */ 64 @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) 65 public static final String PROXY_CHANGE_ACTION = "android.intent.action.PROXY_CHANGE"; 66 /** {@hide} **/ 67 public static final String EXTRA_PROXY_INFO = "proxy"; 68 69 private static ConnectivityManager sConnectivityManager = null; 70 71 // Hostname / IP REGEX validation 72 // Matches blank input, ips, and domain names 73 private static final String NAME_IP_REGEX = 74 "[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*(\\.[a-zA-Z0-9]+(\\-[a-zA-Z0-9]+)*)*"; 75 76 private static final String HOSTNAME_REGEXP = "^$|^" + NAME_IP_REGEX + "$"; 77 78 private static final Pattern HOSTNAME_PATTERN; 79 80 private static final String EXCLLIST_REGEXP = "$|^(.?" + NAME_IP_REGEX 81 + ")+(,(.?" + NAME_IP_REGEX + "))*$"; 82 83 private static final Pattern EXCLLIST_PATTERN; 84 85 static { 86 HOSTNAME_PATTERN = Pattern.compile(HOSTNAME_REGEXP); 87 EXCLLIST_PATTERN = Pattern.compile(EXCLLIST_REGEXP); 88 sDefaultProxySelector = ProxySelector.getDefault(); 89 } 90 91 /** 92 * Return the proxy object to be used for the URL given as parameter. 93 * @param ctx A Context used to get the settings for the proxy host. 94 * @param url A URL to be accessed. Used to evaluate exclusion list. 95 * @return Proxy (java.net) object containing the host name. If the 96 * user did not set a hostname it returns the default host. 97 * A null value means that no host is to be used. 98 * {@hide} 99 */ 100 public static final java.net.Proxy getProxy(Context ctx, String url) { 101 String host = ""; 102 if (url != null) { 103 URI uri = URI.create(url); 104 host = uri.getHost(); 105 } 106 107 if (!isLocalHost(host)) { 108 if (sConnectivityManager == null) { 109 sConnectivityManager = (ConnectivityManager)ctx.getSystemService( 110 Context.CONNECTIVITY_SERVICE); 111 } 112 if (sConnectivityManager == null) return java.net.Proxy.NO_PROXY; 113 114 ProxyProperties proxyProperties = sConnectivityManager.getProxy(); 115 116 if (proxyProperties != null) { 117 if (!proxyProperties.isExcluded(host)) { 118 return proxyProperties.makeProxy(); 119 } 120 } 121 } 122 return java.net.Proxy.NO_PROXY; 123 } 124 125 126 /** 127 * Return the proxy host set by the user. 128 * @param ctx A Context used to get the settings for the proxy host. 129 * @return String containing the host name. If the user did not set a host 130 * name it returns the default host. A null value means that no 131 * host is to be used. 132 * @deprecated Use standard java vm proxy values to find the host, port 133 * and exclusion list. This call ignores the exclusion list. 134 */ 135 public static final String getHost(Context ctx) { 136 java.net.Proxy proxy = getProxy(ctx, null); 137 if (proxy == java.net.Proxy.NO_PROXY) return null; 138 try { 139 return ((InetSocketAddress)(proxy.address())).getHostName(); 140 } catch (Exception e) { 141 return null; 142 } 143 } 144 145 /** 146 * Return the proxy port set by the user. 147 * @param ctx A Context used to get the settings for the proxy port. 148 * @return The port number to use or -1 if no proxy is to be used. 149 * @deprecated Use standard java vm proxy values to find the host, port 150 * and exclusion list. This call ignores the exclusion list. 151 */ 152 public static final int getPort(Context ctx) { 153 java.net.Proxy proxy = getProxy(ctx, null); 154 if (proxy == java.net.Proxy.NO_PROXY) return -1; 155 try { 156 return ((InetSocketAddress)(proxy.address())).getPort(); 157 } catch (Exception e) { 158 return -1; 159 } 160 } 161 162 /** 163 * Return the default proxy host specified by the carrier. 164 * @return String containing the host name or null if there is no proxy for 165 * this carrier. 166 * @deprecated Use standard java vm proxy values to find the host, port and 167 * exclusion list. This call ignores the exclusion list and no 168 * longer reports only mobile-data apn-based proxy values. 169 */ 170 public static final String getDefaultHost() { 171 String host = System.getProperty("http.proxyHost"); 172 if (TextUtils.isEmpty(host)) return null; 173 return host; 174 } 175 176 /** 177 * Return the default proxy port specified by the carrier. 178 * @return The port number to be used with the proxy host or -1 if there is 179 * no proxy for this carrier. 180 * @deprecated Use standard java vm proxy values to find the host, port and 181 * exclusion list. This call ignores the exclusion list and no 182 * longer reports only mobile-data apn-based proxy values. 183 */ 184 public static final int getDefaultPort() { 185 if (getDefaultHost() == null) return -1; 186 try { 187 return Integer.parseInt(System.getProperty("http.proxyPort")); 188 } catch (NumberFormatException e) { 189 return -1; 190 } 191 } 192 193 /** 194 * Returns the preferred proxy to be used by clients. This is a wrapper 195 * around {@link android.net.Proxy#getHost()}. 196 * 197 * @param context the context which will be passed to 198 * {@link android.net.Proxy#getHost()} 199 * @param url the target URL for the request 200 * @note Calling this method requires permission 201 * android.permission.ACCESS_NETWORK_STATE 202 * @return The preferred proxy to be used by clients, or null if there 203 * is no proxy. 204 * {@hide} 205 */ 206 public static final HttpHost getPreferredHttpHost(Context context, 207 String url) { 208 java.net.Proxy prefProxy = getProxy(context, url); 209 if (prefProxy.equals(java.net.Proxy.NO_PROXY)) { 210 return null; 211 } else { 212 InetSocketAddress sa = (InetSocketAddress)prefProxy.address(); 213 return new HttpHost(sa.getHostName(), sa.getPort(), "http"); 214 } 215 } 216 217 private static final boolean isLocalHost(String host) { 218 if (host == null) { 219 return false; 220 } 221 try { 222 if (host != null) { 223 if (host.equalsIgnoreCase("localhost")) { 224 return true; 225 } 226 if (NetworkUtils.numericToInetAddress(host).isLoopbackAddress()) { 227 return true; 228 } 229 } 230 } catch (IllegalArgumentException iex) { 231 } 232 return false; 233 } 234 235 /** 236 * Validate syntax of hostname, port and exclusion list entries 237 * {@hide} 238 */ 239 public static void validate(String hostname, String port, String exclList) { 240 Matcher match = HOSTNAME_PATTERN.matcher(hostname); 241 Matcher listMatch = EXCLLIST_PATTERN.matcher(exclList); 242 243 if (!match.matches()) { 244 throw new IllegalArgumentException(); 245 } 246 247 if (!listMatch.matches()) { 248 throw new IllegalArgumentException(); 249 } 250 251 if (hostname.length() > 0 && port.length() == 0) { 252 throw new IllegalArgumentException(); 253 } 254 255 if (port.length() > 0) { 256 if (hostname.length() == 0) { 257 throw new IllegalArgumentException(); 258 } 259 int portVal = -1; 260 try { 261 portVal = Integer.parseInt(port); 262 } catch (NumberFormatException ex) { 263 throw new IllegalArgumentException(); 264 } 265 if (portVal <= 0 || portVal > 0xFFFF) { 266 throw new IllegalArgumentException(); 267 } 268 } 269 } 270 271 static class AndroidProxySelectorRoutePlanner 272 extends org.apache.http.impl.conn.ProxySelectorRoutePlanner { 273 274 private Context mContext; 275 276 public AndroidProxySelectorRoutePlanner(SchemeRegistry schreg, ProxySelector prosel, 277 Context context) { 278 super(schreg, prosel); 279 mContext = context; 280 } 281 282 @Override 283 protected java.net.Proxy chooseProxy(List<java.net.Proxy> proxies, HttpHost target, 284 HttpRequest request, HttpContext context) { 285 return getProxy(mContext, target.getHostName()); 286 } 287 288 @Override 289 protected HttpHost determineProxy(HttpHost target, HttpRequest request, 290 HttpContext context) { 291 return getPreferredHttpHost(mContext, target.getHostName()); 292 } 293 294 @Override 295 public HttpRoute determineRoute(HttpHost target, HttpRequest request, 296 HttpContext context) { 297 HttpHost proxy = getPreferredHttpHost(mContext, target.getHostName()); 298 if (proxy == null) { 299 return new HttpRoute(target); 300 } else { 301 return new HttpRoute(target, null, proxy, false); 302 } 303 } 304 } 305 306 /** @hide */ 307 public static final HttpRoutePlanner getAndroidProxySelectorRoutePlanner(Context context) { 308 AndroidProxySelectorRoutePlanner ret = new AndroidProxySelectorRoutePlanner( 309 new SchemeRegistry(), ProxySelector.getDefault(), context); 310 return ret; 311 } 312 313 /** @hide */ 314 public static final void setHttpProxySystemProperty(ProxyProperties p) { 315 String host = null; 316 String port = null; 317 String exclList = null; 318 String pacFileUrl = null; 319 if (p != null) { 320 host = p.getHost(); 321 port = Integer.toString(p.getPort()); 322 exclList = p.getExclusionList(); 323 pacFileUrl = p.getPacFileUrl(); 324 } 325 setHttpProxySystemProperty(host, port, exclList, pacFileUrl); 326 } 327 328 /** @hide */ 329 public static final void setHttpProxySystemProperty(String host, String port, String exclList, 330 String pacFileUrl) { 331 if (exclList != null) exclList = exclList.replace(",", "|"); 332 if (false) Log.d(TAG, "setHttpProxySystemProperty :"+host+":"+port+" - "+exclList); 333 if (host != null) { 334 System.setProperty("http.proxyHost", host); 335 System.setProperty("https.proxyHost", host); 336 } else { 337 System.clearProperty("http.proxyHost"); 338 System.clearProperty("https.proxyHost"); 339 } 340 if (port != null) { 341 System.setProperty("http.proxyPort", port); 342 System.setProperty("https.proxyPort", port); 343 } else { 344 System.clearProperty("http.proxyPort"); 345 System.clearProperty("https.proxyPort"); 346 } 347 if (exclList != null) { 348 System.setProperty("http.nonProxyHosts", exclList); 349 System.setProperty("https.nonProxyHosts", exclList); 350 } else { 351 System.clearProperty("http.nonProxyHosts"); 352 System.clearProperty("https.nonProxyHosts"); 353 } 354 if (!TextUtils.isEmpty(pacFileUrl)) { 355 ProxySelector.setDefault(new PacProxySelector()); 356 } else { 357 ProxySelector.setDefault(sDefaultProxySelector); 358 } 359 } 360 } 361