Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 1 | // Copyright 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.chromoting; |
| 6 | |
| 7 | import android.accounts.Account; |
| 8 | import android.accounts.AccountManager; |
| 9 | import android.accounts.AccountManagerCallback; |
| 10 | import android.accounts.AccountManagerFuture; |
| 11 | import android.accounts.AuthenticatorException; |
| 12 | import android.accounts.OperationCanceledException; |
| 13 | import android.app.Activity; |
| 14 | import android.content.Context; |
| 15 | import android.content.Intent; |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 16 | import android.content.SharedPreferences; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 17 | import android.os.Bundle; |
| 18 | import android.os.Handler; |
| 19 | import android.os.HandlerThread; |
| 20 | import android.text.Html; |
| 21 | import android.util.Log; |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 22 | import android.view.Menu; |
| 23 | import android.view.MenuItem; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 24 | import android.view.View; |
| 25 | import android.view.ViewGroup; |
| 26 | import android.widget.ArrayAdapter; |
| 27 | import android.widget.TextView; |
| 28 | import android.widget.ListView; |
| 29 | import android.widget.Toast; |
| 30 | |
| 31 | import org.chromium.chromoting.jni.JniInterface; |
| 32 | import org.json.JSONArray; |
| 33 | import org.json.JSONException; |
| 34 | import org.json.JSONObject; |
| 35 | |
| 36 | import java.io.IOException; |
| 37 | import java.net.URL; |
| 38 | import java.net.URLConnection; |
| 39 | import java.util.Scanner; |
| 40 | |
| 41 | /** |
| 42 | * The user interface for querying and displaying a user's host list from the directory server. It |
| 43 | * also requests and renews authentication tokens using the system account manager. |
| 44 | */ |
| 45 | public class Chromoting extends Activity { |
| 46 | /** Only accounts of this type will be selectable for authentication. */ |
| 47 | private static final String ACCOUNT_TYPE = "com.google"; |
| 48 | |
| 49 | /** Scopes at which the authentication token we request will be valid. */ |
| 50 | private static final String TOKEN_SCOPE = "oauth2:https://www.googleapis.com/auth/chromoting " + |
| 51 | "https://www.googleapis.com/auth/googletalk"; |
| 52 | |
| 53 | /** Path from which to download a user's host list JSON object. */ |
| 54 | private static final String HOST_LIST_PATH = |
| 55 | "https://www.googleapis.com/chromoting/v1/@me/hosts?key="; |
| 56 | |
| 57 | /** Color to use for hosts that are online. */ |
| 58 | private static final String HOST_COLOR_ONLINE = "green"; |
| 59 | |
| 60 | /** Color to use for hosts that are offline. */ |
| 61 | private static final String HOST_COLOR_OFFLINE = "red"; |
| 62 | |
| 63 | /** User's account details. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 64 | private Account mAccount; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 65 | |
| 66 | /** Account auth token. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 67 | private String mToken; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 68 | |
| 69 | /** List of hosts. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 70 | private JSONArray mHosts; |
| 71 | |
| 72 | /** Account switcher. */ |
| 73 | private MenuItem mAccountSwitcher; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 74 | |
| 75 | /** Greeting at the top of the displayed list. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 76 | private TextView mGreeting; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 77 | |
| 78 | /** Host list as it appears to the user. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 79 | private ListView mList; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 80 | |
| 81 | /** Callback handler to be used for network operations. */ |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 82 | private Handler mNetwork; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 83 | |
| 84 | /** |
| 85 | * Called when the activity is first created. Loads the native library and requests an |
| 86 | * authentication token from the system. |
| 87 | */ |
| 88 | @Override |
| 89 | public void onCreate(Bundle savedInstanceState) { |
| 90 | super.onCreate(savedInstanceState); |
| 91 | setContentView(R.layout.main); |
| 92 | |
| 93 | // Get ahold of our view widgets. |
| 94 | mGreeting = (TextView)findViewById(R.id.hostList_greeting); |
| 95 | mList = (ListView)findViewById(R.id.hostList_chooser); |
| 96 | |
| 97 | // Bring native components online. |
| 98 | JniInterface.loadLibrary(this); |
| 99 | |
| 100 | // Thread responsible for downloading/displaying host list. |
| 101 | HandlerThread thread = new HandlerThread("auth_callback"); |
| 102 | thread.start(); |
| 103 | mNetwork = new Handler(thread.getLooper()); |
| 104 | |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 105 | SharedPreferences prefs = getPreferences(MODE_PRIVATE); |
| 106 | if (prefs.contains("account_name") && prefs.contains("account_type")) { |
| 107 | // Perform authentication using saved account selection. |
| 108 | mAccount = new Account(prefs.getString("account_name", null), |
| 109 | prefs.getString("account_type", null)); |
| 110 | AccountManager.get(this).getAuthToken(mAccount, TOKEN_SCOPE, null, this, |
| 111 | new HostListDirectoryGrabber(this), mNetwork); |
| 112 | if (mAccountSwitcher != null) { |
| 113 | mAccountSwitcher.setTitle(mAccount.name); |
| 114 | } |
| 115 | } else { |
| 116 | // Request auth callback once user has chosen an account. |
| 117 | Log.i("auth", "Requesting auth token from system"); |
| 118 | AccountManager.get(this).getAuthTokenByFeatures( |
| 119 | ACCOUNT_TYPE, |
| 120 | TOKEN_SCOPE, |
| 121 | null, |
| 122 | this, |
| 123 | null, |
| 124 | null, |
| 125 | new HostListDirectoryGrabber(this), |
| 126 | mNetwork |
| 127 | ); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /** Called when the activity is finally finished. */ |
| 132 | @Override |
| 133 | public void onDestroy() { |
| 134 | super.onDestroy(); |
| 135 | JniInterface.disconnectFromHost(); |
| 136 | } |
| 137 | |
| 138 | /** Called to initialize the action bar. */ |
| 139 | @Override |
| 140 | public boolean onCreateOptionsMenu(Menu menu) { |
| 141 | getMenuInflater().inflate(R.menu.chromoting_actionbar, menu); |
| 142 | mAccountSwitcher = menu.findItem(R.id.actionbar_accountswitcher); |
| 143 | if (mAccount != null) { |
| 144 | mAccountSwitcher.setTitle(mAccount.name); |
| 145 | } |
| 146 | |
| 147 | return super.onCreateOptionsMenu(menu); |
| 148 | } |
| 149 | |
| 150 | /** Called whenever an action bar button is pressed. */ |
| 151 | @Override |
| 152 | public boolean onOptionsItemSelected(MenuItem item) { |
| 153 | // The only button is the account switcher, so defer to the android accounts system now. |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 154 | AccountManager.get(this).getAuthTokenByFeatures( |
| 155 | ACCOUNT_TYPE, |
| 156 | TOKEN_SCOPE, |
| 157 | null, |
| 158 | this, |
| 159 | null, |
| 160 | null, |
| 161 | new HostListDirectoryGrabber(this), |
| 162 | mNetwork |
| 163 | ); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 164 | return true; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /** |
| 168 | * Processes the authentication token once the system provides it. Once in possession of such a |
| 169 | * token, attempts to request a host list from the directory server. In case of a bad response, |
| 170 | * this is retried once in case the system's cached auth token had expired. |
| 171 | */ |
| 172 | private class HostListDirectoryGrabber implements AccountManagerCallback<Bundle> { |
| 173 | /** Whether authentication has already been attempted. */ |
| 174 | private boolean mAlreadyTried; |
| 175 | |
| 176 | /** Communication with the screen. */ |
| 177 | private Activity mUi; |
| 178 | |
| 179 | /** Constructor. */ |
| 180 | public HostListDirectoryGrabber(Activity ui) { |
| 181 | mAlreadyTried = false; |
| 182 | mUi = ui; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Retrieves the host list from the directory server. This method performs |
| 187 | * network operations and must be run an a non-UI thread. |
| 188 | */ |
| 189 | @Override |
| 190 | public void run(AccountManagerFuture<Bundle> future) { |
| 191 | Log.i("auth", "User finished with auth dialogs"); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 192 | try { |
| 193 | // Here comes our auth token from the Android system. |
| 194 | Bundle result = future.getResult(); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 195 | String accountName = result.getString(AccountManager.KEY_ACCOUNT_NAME); |
| 196 | String accountType = result.getString(AccountManager.KEY_ACCOUNT_TYPE); |
| 197 | String authToken = result.getString(AccountManager.KEY_AUTHTOKEN); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 198 | Log.i("auth", "Received an auth token from system"); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 199 | |
| 200 | synchronized (mUi) { |
| 201 | mAccount = new Account(accountName, accountType); |
| 202 | mToken = authToken; |
| 203 | getPreferences(MODE_PRIVATE).edit().putString("account_name", accountName). |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 204 | putString("account_type", accountType).apply(); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 205 | } |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 206 | |
| 207 | // Send our HTTP request to the directory server. |
| 208 | URLConnection link = |
| 209 | new URL(HOST_LIST_PATH + JniInterface.getApiKey()).openConnection(); |
| 210 | link.addRequestProperty("client_id", JniInterface.getClientId()); |
| 211 | link.addRequestProperty("client_secret", JniInterface.getClientSecret()); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 212 | link.setRequestProperty("Authorization", "OAuth " + authToken); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 213 | |
| 214 | // Listen for the server to respond. |
| 215 | StringBuilder response = new StringBuilder(); |
| 216 | Scanner incoming = new Scanner(link.getInputStream()); |
| 217 | Log.i("auth", "Successfully authenticated to directory server"); |
| 218 | while (incoming.hasNext()) { |
| 219 | response.append(incoming.nextLine()); |
| 220 | } |
| 221 | incoming.close(); |
| 222 | |
| 223 | // Interpret what the directory server told us. |
| 224 | JSONObject data = new JSONObject(String.valueOf(response)).getJSONObject("data"); |
| 225 | mHosts = data.getJSONArray("items"); |
| 226 | Log.i("hostlist", "Received host listing from directory server"); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 227 | } catch (RuntimeException ex) { |
| 228 | // Make sure any other failure is reported to the user (as an unknown error). |
| 229 | throw ex; |
| 230 | } catch (Exception ex) { |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 231 | // Assemble error message to display to the user. |
| 232 | String explanation = getString(R.string.error_unknown); |
| 233 | if (ex instanceof OperationCanceledException) { |
| 234 | explanation = getString(R.string.error_auth_canceled); |
| 235 | } else if (ex instanceof AuthenticatorException) { |
| 236 | explanation = getString(R.string.error_no_accounts); |
| 237 | } else if (ex instanceof IOException) { |
| 238 | if (!mAlreadyTried) { // This was our first connection attempt. |
| 239 | Log.w("auth", "Unable to authenticate with (expired?) token"); |
| 240 | |
| 241 | // Ask system to renew the auth token in case it expired. |
| 242 | AccountManager authenticator = AccountManager.get(mUi); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 243 | synchronized (mUi) { |
| 244 | authenticator.invalidateAuthToken(mAccount.type, mToken); |
| 245 | mToken = null; |
| 246 | Log.i("auth", "Requesting auth token renewal"); |
| 247 | authenticator.getAuthToken( |
| 248 | mAccount, TOKEN_SCOPE, null, mUi, this, mNetwork); |
| 249 | } |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 250 | |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 251 | // We're not in an error state *yet*. |
| 252 | mAlreadyTried = true; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 253 | return; |
| 254 | } else { // Authentication truly failed. |
| 255 | Log.e("auth", "Fresh auth token was also rejected"); |
| 256 | explanation = getString(R.string.error_auth_failed); |
| 257 | } |
| 258 | } else if (ex instanceof JSONException) { |
| 259 | explanation = getString(R.string.error_unexpected_response); |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 260 | runOnUiThread(new HostListDisplayer(mUi)); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 261 | } |
| 262 | |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 263 | mHosts = null; |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 264 | Log.w("auth", ex); |
| 265 | Toast.makeText(mUi, explanation, Toast.LENGTH_LONG).show(); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 266 | } |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 267 | |
| 268 | // Share our findings with the user. |
| 269 | runOnUiThread(new HostListDisplayer(mUi)); |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 270 | } |
| 271 | } |
| 272 | |
| 273 | /** Formats the host list and offers it to the user. */ |
| 274 | private class HostListDisplayer implements Runnable { |
| 275 | /** Communication with the screen. */ |
| 276 | private Activity mUi; |
| 277 | |
| 278 | /** Constructor. */ |
| 279 | public HostListDisplayer(Activity ui) { |
| 280 | mUi = ui; |
| 281 | } |
| 282 | |
| 283 | /** |
| 284 | * Updates the infotext and host list display. |
| 285 | * This method affects the UI and must be run on its same thread. |
| 286 | */ |
| 287 | @Override |
| 288 | public void run() { |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 289 | synchronized (mUi) { |
| 290 | mAccountSwitcher.setTitle(mAccount.name); |
| 291 | } |
| 292 | |
| 293 | if (mHosts == null) { |
| 294 | mGreeting.setText(getString(R.string.inst_empty_list)); |
| 295 | mList.setAdapter(null); |
| 296 | return; |
| 297 | } |
| 298 | |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 299 | mGreeting.setText(getString(R.string.inst_host_list)); |
| 300 | |
| 301 | ArrayAdapter<JSONObject> displayer = new HostListAdapter(mUi, R.layout.host); |
| 302 | Log.i("hostlist", "About to populate host list display"); |
| 303 | try { |
| 304 | int index = 0; |
| 305 | while (!mHosts.isNull(index)) { |
| 306 | displayer.add(mHosts.getJSONObject(index)); |
| 307 | ++index; |
| 308 | } |
| 309 | mList.setAdapter(displayer); |
| 310 | } |
| 311 | catch(JSONException ex) { |
| 312 | Log.w("hostlist", ex); |
| 313 | Toast.makeText( |
| 314 | mUi, getString(R.string.error_cataloging_hosts), Toast.LENGTH_LONG).show(); |
| 315 | |
| 316 | // Close the application. |
| 317 | finish(); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /** Describes the appearance and behavior of each host list entry. */ |
| 323 | private class HostListAdapter extends ArrayAdapter<JSONObject> { |
| 324 | /** Constructor. */ |
| 325 | public HostListAdapter(Context context, int textViewResourceId) { |
| 326 | super(context, textViewResourceId); |
| 327 | } |
| 328 | |
| 329 | /** Generates a View corresponding to this particular host. */ |
| 330 | @Override |
| 331 | public View getView(int position, View convertView, ViewGroup parent) { |
| 332 | TextView target = (TextView)super.getView(position, convertView, parent); |
| 333 | |
| 334 | try { |
| 335 | final JSONObject host = getItem(position); |
| 336 | target.setText(Html.fromHtml(host.getString("hostName") + " (<font color = \"" + |
| 337 | (host.getString("status").equals("ONLINE") ? HOST_COLOR_ONLINE : |
| 338 | HOST_COLOR_OFFLINE) + "\">" + host.getString("status") + "</font>)")); |
| 339 | |
| 340 | if (host.getString("status").equals("ONLINE")) { // Host is online. |
| 341 | target.setOnClickListener(new View.OnClickListener() { |
| 342 | @Override |
| 343 | public void onClick(View v) { |
| 344 | try { |
Torne (Richard Coles) | a36e592 | 2013-08-05 13:57:33 +0100 | [diff] [blame] | 345 | synchronized (getContext()) { |
| 346 | JniInterface.connectToHost(mAccount.name, mToken, |
| 347 | host.getString("jabberId"), |
| 348 | host.getString("hostId"), |
| 349 | host.getString("publicKey"), |
| 350 | new Runnable() { |
| 351 | @Override |
| 352 | public void run() { |
| 353 | startActivity( |
| 354 | new Intent(getContext(), Desktop.class)); |
| 355 | } |
| 356 | }); |
| 357 | } |
Ben Murdoch | ca12bfa | 2013-07-23 11:17:05 +0100 | [diff] [blame] | 358 | } |
| 359 | catch(JSONException ex) { |
| 360 | Log.w("host", ex); |
| 361 | Toast.makeText(getContext(), |
| 362 | getString(R.string.error_reading_host), |
| 363 | Toast.LENGTH_LONG).show(); |
| 364 | |
| 365 | // Close the application. |
| 366 | finish(); |
| 367 | } |
| 368 | } |
| 369 | }); |
| 370 | } else { // Host is offline. |
| 371 | // Disallow interaction with this entry. |
| 372 | target.setEnabled(false); |
| 373 | } |
| 374 | } |
| 375 | catch(JSONException ex) { |
| 376 | Log.w("hostlist", ex); |
| 377 | Toast.makeText(getContext(), |
| 378 | getString(R.string.error_displaying_host), |
| 379 | Toast.LENGTH_LONG).show(); |
| 380 | |
| 381 | // Close the application. |
| 382 | finish(); |
| 383 | } |
| 384 | |
| 385 | return target; |
| 386 | } |
| 387 | } |
| 388 | } |