CaptivePortalLoginActivity.java revision 71b645fe9cb8106dfcbf025a3fd7f58698c051bb
1/* 2 * Copyright (C) 2014 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 17package com.android.captiveportallogin; 18 19import android.app.Activity; 20import android.app.LoadedApk; 21import android.content.Context; 22import android.content.Intent; 23import android.graphics.Bitmap; 24import android.net.ConnectivityManager; 25import android.net.ConnectivityManager.NetworkCallback; 26import android.net.LinkProperties; 27import android.net.Network; 28import android.net.NetworkCapabilities; 29import android.net.NetworkRequest; 30import android.net.Proxy; 31import android.net.ProxyInfo; 32import android.net.Uri; 33import android.os.Bundle; 34import android.provider.Settings; 35import android.provider.Settings.Global; 36import android.util.ArrayMap; 37import android.util.Log; 38import android.view.Menu; 39import android.view.MenuItem; 40import android.view.View; 41import android.view.Window; 42import android.webkit.WebChromeClient; 43import android.webkit.WebSettings; 44import android.webkit.WebView; 45import android.webkit.WebViewClient; 46import android.widget.ProgressBar; 47 48import java.io.IOException; 49import java.net.HttpURLConnection; 50import java.net.MalformedURLException; 51import java.net.URL; 52import java.lang.InterruptedException; 53import java.lang.reflect.Field; 54import java.lang.reflect.Method; 55 56public class CaptivePortalLoginActivity extends Activity { 57 private static final String TAG = "CaptivePortalLogin"; 58 private static final String DEFAULT_SERVER = "clients3.google.com"; 59 private static final int SOCKET_TIMEOUT_MS = 10000; 60 61 // Keep this in sync with NetworkMonitor. 62 // Intent broadcast to ConnectivityService indicating sign-in is complete. 63 // Extras: 64 // EXTRA_TEXT = netId 65 // LOGGED_IN_RESULT = one of the CAPTIVE_PORTAL_APP_RETURN_* values below. 66 // RESPONSE_TOKEN = data fragment from launching Intent 67 private static final String ACTION_CAPTIVE_PORTAL_LOGGED_IN = 68 "android.net.netmon.captive_portal_logged_in"; 69 private static final String LOGGED_IN_RESULT = "result"; 70 private static final int CAPTIVE_PORTAL_APP_RETURN_APPEASED = 0; 71 private static final int CAPTIVE_PORTAL_APP_RETURN_UNWANTED = 1; 72 private static final int CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS = 2; 73 private static final String RESPONSE_TOKEN = "response_token"; 74 75 private URL mURL; 76 private int mNetId; 77 private String mResponseToken; 78 private NetworkCallback mNetworkCallback; 79 80 @Override 81 protected void onCreate(Bundle savedInstanceState) { 82 super.onCreate(savedInstanceState); 83 84 String server = Settings.Global.getString(getContentResolver(), "captive_portal_server"); 85 if (server == null) server = DEFAULT_SERVER; 86 try { 87 mURL = new URL("http", server, "/generate_204"); 88 final Uri dataUri = getIntent().getData(); 89 if (!dataUri.getScheme().equals("netid")) { 90 throw new MalformedURLException(); 91 } 92 mNetId = Integer.parseInt(dataUri.getSchemeSpecificPart()); 93 mResponseToken = dataUri.getFragment(); 94 } catch (MalformedURLException|NumberFormatException e) { 95 // System misconfigured, bail out in a way that at least provides network access. 96 done(CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS); 97 } 98 99 final Network network = new Network(mNetId); 100 ConnectivityManager.setProcessDefaultNetwork(network); 101 102 // Set HTTP proxy system properties to those of the selected Network. 103 final LinkProperties lp = ConnectivityManager.from(this).getLinkProperties(network); 104 if (lp != null) { 105 final ProxyInfo proxyInfo = lp.getHttpProxy(); 106 String host = ""; 107 String port = ""; 108 String exclList = ""; 109 Uri pacFileUrl = Uri.EMPTY; 110 if (proxyInfo != null) { 111 host = proxyInfo.getHost(); 112 port = Integer.toString(proxyInfo.getPort()); 113 exclList = proxyInfo.getExclusionListAsString(); 114 pacFileUrl = proxyInfo.getPacFileUrl(); 115 } 116 Proxy.setHttpProxySystemProperty(host, port, exclList, pacFileUrl); 117 Log.v(TAG, "Set proxy system properties to " + proxyInfo); 118 } 119 120 // Proxy system properties must be initialized before setContentView is called because 121 // setContentView initializes the WebView logic which in turn reads the system properties. 122 setContentView(R.layout.activity_captive_portal_login); 123 124 getActionBar().setDisplayShowHomeEnabled(false); 125 126 // Exit app if Network disappears. 127 final NetworkCapabilities networkCapabilities = 128 ConnectivityManager.from(this).getNetworkCapabilities(network); 129 if (networkCapabilities == null) { 130 finish(); 131 return; 132 } 133 mNetworkCallback = new NetworkCallback() { 134 @Override 135 public void onLost(Network lostNetwork) { 136 if (network.equals(lostNetwork)) done(CAPTIVE_PORTAL_APP_RETURN_UNWANTED); 137 } 138 }; 139 final NetworkRequest.Builder builder = new NetworkRequest.Builder(); 140 for (int transportType : networkCapabilities.getTransportTypes()) { 141 builder.addTransportType(transportType); 142 } 143 ConnectivityManager.from(this).registerNetworkCallback(builder.build(), mNetworkCallback); 144 145 final WebView myWebView = (WebView) findViewById(R.id.webview); 146 myWebView.clearCache(true); 147 WebSettings webSettings = myWebView.getSettings(); 148 webSettings.setJavaScriptEnabled(true); 149 myWebView.setWebViewClient(new MyWebViewClient()); 150 myWebView.setWebChromeClient(new MyWebChromeClient()); 151 // Start initial page load so WebView finishes loading proxy settings. 152 // Actual load of mUrl is initiated by MyWebViewClient. 153 myWebView.loadData("", "text/html", null); 154 } 155 156 // Find WebView's proxy BroadcastReceiver and prompt it to read proxy system properties. 157 private void setWebViewProxy() { 158 LoadedApk loadedApk = getApplication().mLoadedApk; 159 try { 160 Field receiversField = LoadedApk.class.getDeclaredField("mReceivers"); 161 receiversField.setAccessible(true); 162 ArrayMap receivers = (ArrayMap) receiversField.get(loadedApk); 163 for (Object receiverMap : receivers.values()) { 164 for (Object rec : ((ArrayMap) receiverMap).keySet()) { 165 Class clazz = rec.getClass(); 166 if (clazz.getName().contains("ProxyChangeListener")) { 167 Method onReceiveMethod = clazz.getDeclaredMethod("onReceive", Context.class, 168 Intent.class); 169 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 170 onReceiveMethod.invoke(rec, getApplicationContext(), intent); 171 Log.v(TAG, "Prompting WebView proxy reload."); 172 } 173 } 174 } 175 } catch (Exception e) { 176 Log.e(TAG, "Exception while setting WebView proxy: " + e); 177 } 178 } 179 180 private void done(int result) { 181 if (mNetworkCallback != null) { 182 ConnectivityManager.from(this).unregisterNetworkCallback(mNetworkCallback); 183 } 184 Intent intent = new Intent(ACTION_CAPTIVE_PORTAL_LOGGED_IN); 185 intent.putExtra(Intent.EXTRA_TEXT, String.valueOf(mNetId)); 186 intent.putExtra(LOGGED_IN_RESULT, String.valueOf(result)); 187 intent.putExtra(RESPONSE_TOKEN, mResponseToken); 188 sendBroadcast(intent); 189 finish(); 190 } 191 192 @Override 193 public boolean onCreateOptionsMenu(Menu menu) { 194 getMenuInflater().inflate(R.menu.captive_portal_login, menu); 195 return true; 196 } 197 198 @Override 199 public void onBackPressed() { 200 WebView myWebView = (WebView) findViewById(R.id.webview); 201 if (myWebView.canGoBack()) { 202 myWebView.goBack(); 203 } else { 204 super.onBackPressed(); 205 } 206 } 207 208 @Override 209 public boolean onOptionsItemSelected(MenuItem item) { 210 int id = item.getItemId(); 211 if (id == R.id.action_use_network) { 212 done(CAPTIVE_PORTAL_APP_RETURN_WANTED_AS_IS); 213 return true; 214 } 215 if (id == R.id.action_do_not_use_network) { 216 done(CAPTIVE_PORTAL_APP_RETURN_UNWANTED); 217 return true; 218 } 219 return super.onOptionsItemSelected(item); 220 } 221 222 private void testForCaptivePortal() { 223 new Thread(new Runnable() { 224 public void run() { 225 // Give time for captive portal to open. 226 try { 227 Thread.sleep(1000); 228 } catch (InterruptedException e) { 229 } 230 HttpURLConnection urlConnection = null; 231 int httpResponseCode = 500; 232 try { 233 urlConnection = (HttpURLConnection) mURL.openConnection(); 234 urlConnection.setInstanceFollowRedirects(false); 235 urlConnection.setConnectTimeout(SOCKET_TIMEOUT_MS); 236 urlConnection.setReadTimeout(SOCKET_TIMEOUT_MS); 237 urlConnection.setUseCaches(false); 238 urlConnection.getInputStream(); 239 httpResponseCode = urlConnection.getResponseCode(); 240 } catch (IOException e) { 241 } finally { 242 if (urlConnection != null) urlConnection.disconnect(); 243 } 244 if (httpResponseCode == 204) { 245 done(CAPTIVE_PORTAL_APP_RETURN_APPEASED); 246 } 247 } 248 }).start(); 249 } 250 251 private class MyWebViewClient extends WebViewClient { 252 private boolean firstPageLoad = true; 253 254 @Override 255 public void onPageStarted(WebView view, String url, Bitmap favicon) { 256 if (firstPageLoad) return; 257 testForCaptivePortal(); 258 } 259 260 @Override 261 public void onPageFinished(WebView view, String url) { 262 if (firstPageLoad) { 263 firstPageLoad = false; 264 // Now that WebView has loaded at least one page we know it has read in the proxy 265 // settings. Now prompt the WebView read the Network-specific proxy settings. 266 setWebViewProxy(); 267 // Load the real page. 268 view.loadUrl(mURL.toString()); 269 return; 270 } 271 testForCaptivePortal(); 272 } 273 } 274 275 private class MyWebChromeClient extends WebChromeClient { 276 @Override 277 public void onProgressChanged(WebView view, int newProgress) { 278 ProgressBar myProgressBar = (ProgressBar) findViewById(R.id.progress_bar); 279 myProgressBar.setProgress(newProgress); 280 myProgressBar.setVisibility(newProgress == 100 ? View.GONE : View.VISIBLE); 281 } 282 } 283} 284