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| 1 /* | |
| 2 * libjingle | |
| 3 * Copyright 2014 Google Inc. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 * this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 * this list of conditions and the following disclaimer in the documentation | |
| 12 * and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 package org.appspot.apprtc; | |
| 29 | |
| 30 import org.appspot.apprtc.RoomParametersFetcher.RoomParametersFetcherEvents; | |
| 31 import org.appspot.apprtc.WebSocketChannelClient.WebSocketChannelEvents; | |
| 32 import org.appspot.apprtc.WebSocketChannelClient.WebSocketConnectionState; | |
| 33 import org.appspot.apprtc.util.AsyncHttpURLConnection; | |
| 34 import org.appspot.apprtc.util.AsyncHttpURLConnection.AsyncHttpEvents; | |
| 35 import org.appspot.apprtc.util.LooperExecutor; | |
| 36 | |
| 37 import android.util.Log; | |
| 38 | |
| 39 import org.json.JSONException; | |
| 40 import org.json.JSONObject; | |
| 41 import org.webrtc.IceCandidate; | |
| 42 import org.webrtc.SessionDescription; | |
| 43 | |
| 44 /** | |
| 45 * Negotiates signaling for chatting with apprtc.appspot.com "rooms". | |
| 46 * Uses the client<->server specifics of the apprtc AppEngine webapp. | |
| 47 * | |
| 48 * <p>To use: create an instance of this object (registering a message handler)
and | |
| 49 * call connectToRoom(). Once room connection is established | |
| 50 * onConnectedToRoom() callback with room parameters is invoked. | |
| 51 * Messages to other party (with local Ice candidates and answer SDP) can | |
| 52 * be sent after WebSocket connection is established. | |
| 53 */ | |
| 54 public class WebSocketRTCClient implements AppRTCClient, | |
| 55 WebSocketChannelEvents { | |
| 56 private static final String TAG = "WSRTCClient"; | |
| 57 private static final String ROOM_JOIN = "join"; | |
| 58 private static final String ROOM_MESSAGE = "message"; | |
| 59 private static final String ROOM_LEAVE = "leave"; | |
| 60 | |
| 61 private enum ConnectionState { | |
| 62 NEW, CONNECTED, CLOSED, ERROR | |
| 63 }; | |
| 64 private enum MessageType { | |
| 65 MESSAGE, LEAVE | |
| 66 }; | |
| 67 private final LooperExecutor executor; | |
| 68 private boolean initiator; | |
| 69 private SignalingEvents events; | |
| 70 private WebSocketChannelClient wsClient; | |
| 71 private ConnectionState roomState; | |
| 72 private RoomConnectionParameters connectionParameters; | |
| 73 private String messageUrl; | |
| 74 private String leaveUrl; | |
| 75 | |
| 76 public WebSocketRTCClient(SignalingEvents events, LooperExecutor executor) { | |
| 77 this.events = events; | |
| 78 this.executor = executor; | |
| 79 roomState = ConnectionState.NEW; | |
| 80 executor.requestStart(); | |
| 81 } | |
| 82 | |
| 83 // -------------------------------------------------------------------- | |
| 84 // AppRTCClient interface implementation. | |
| 85 // Asynchronously connect to an AppRTC room URL using supplied connection | |
| 86 // parameters, retrieves room parameters and connect to WebSocket server. | |
| 87 @Override | |
| 88 public void connectToRoom(RoomConnectionParameters connectionParameters) { | |
| 89 this.connectionParameters = connectionParameters; | |
| 90 executor.execute(new Runnable() { | |
| 91 @Override | |
| 92 public void run() { | |
| 93 connectToRoomInternal(); | |
| 94 } | |
| 95 }); | |
| 96 } | |
| 97 | |
| 98 @Override | |
| 99 public void disconnectFromRoom() { | |
| 100 executor.execute(new Runnable() { | |
| 101 @Override | |
| 102 public void run() { | |
| 103 disconnectFromRoomInternal(); | |
| 104 } | |
| 105 }); | |
| 106 executor.requestStop(); | |
| 107 } | |
| 108 | |
| 109 // Connects to room - function runs on a local looper thread. | |
| 110 private void connectToRoomInternal() { | |
| 111 String connectionUrl = getConnectionUrl(connectionParameters); | |
| 112 Log.d(TAG, "Connect to room: " + connectionUrl); | |
| 113 roomState = ConnectionState.NEW; | |
| 114 wsClient = new WebSocketChannelClient(executor, this); | |
| 115 | |
| 116 RoomParametersFetcherEvents callbacks = new RoomParametersFetcherEvents() { | |
| 117 @Override | |
| 118 public void onSignalingParametersReady( | |
| 119 final SignalingParameters params) { | |
| 120 WebSocketRTCClient.this.executor.execute(new Runnable() { | |
| 121 @Override | |
| 122 public void run() { | |
| 123 WebSocketRTCClient.this.signalingParametersReady(params); | |
| 124 } | |
| 125 }); | |
| 126 } | |
| 127 | |
| 128 @Override | |
| 129 public void onSignalingParametersError(String description) { | |
| 130 WebSocketRTCClient.this.reportError(description); | |
| 131 } | |
| 132 }; | |
| 133 | |
| 134 new RoomParametersFetcher(connectionUrl, null, callbacks).makeRequest(); | |
| 135 } | |
| 136 | |
| 137 // Disconnect from room and send bye messages - runs on a local looper thread. | |
| 138 private void disconnectFromRoomInternal() { | |
| 139 Log.d(TAG, "Disconnect. Room state: " + roomState); | |
| 140 if (roomState == ConnectionState.CONNECTED) { | |
| 141 Log.d(TAG, "Closing room."); | |
| 142 sendPostMessage(MessageType.LEAVE, leaveUrl, null); | |
| 143 } | |
| 144 roomState = ConnectionState.CLOSED; | |
| 145 if (wsClient != null) { | |
| 146 wsClient.disconnect(true); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 // Helper functions to get connection, post message and leave message URLs | |
| 151 private String getConnectionUrl( | |
| 152 RoomConnectionParameters connectionParameters) { | |
| 153 return connectionParameters.roomUrl + "/" + ROOM_JOIN + "/" | |
| 154 + connectionParameters.roomId; | |
| 155 } | |
| 156 | |
| 157 private String getMessageUrl(RoomConnectionParameters connectionParameters, | |
| 158 SignalingParameters signalingParameters) { | |
| 159 return connectionParameters.roomUrl + "/" + ROOM_MESSAGE + "/" | |
| 160 + connectionParameters.roomId + "/" + signalingParameters.clientId; | |
| 161 } | |
| 162 | |
| 163 private String getLeaveUrl(RoomConnectionParameters connectionParameters, | |
| 164 SignalingParameters signalingParameters) { | |
| 165 return connectionParameters.roomUrl + "/" + ROOM_LEAVE + "/" | |
| 166 + connectionParameters.roomId + "/" + signalingParameters.clientId; | |
| 167 } | |
| 168 | |
| 169 // Callback issued when room parameters are extracted. Runs on local | |
| 170 // looper thread. | |
| 171 private void signalingParametersReady( | |
| 172 final SignalingParameters signalingParameters) { | |
| 173 Log.d(TAG, "Room connection completed."); | |
| 174 if (connectionParameters.loopback | |
| 175 && (!signalingParameters.initiator | |
| 176 || signalingParameters.offerSdp != null)) { | |
| 177 reportError("Loopback room is busy."); | |
| 178 return; | |
| 179 } | |
| 180 if (!connectionParameters.loopback | |
| 181 && !signalingParameters.initiator | |
| 182 && signalingParameters.offerSdp == null) { | |
| 183 Log.w(TAG, "No offer SDP in room response."); | |
| 184 } | |
| 185 initiator = signalingParameters.initiator; | |
| 186 messageUrl = getMessageUrl(connectionParameters, signalingParameters); | |
| 187 leaveUrl = getLeaveUrl(connectionParameters, signalingParameters); | |
| 188 Log.d(TAG, "Message URL: " + messageUrl); | |
| 189 Log.d(TAG, "Leave URL: " + leaveUrl); | |
| 190 roomState = ConnectionState.CONNECTED; | |
| 191 | |
| 192 // Fire connection and signaling parameters events. | |
| 193 events.onConnectedToRoom(signalingParameters); | |
| 194 | |
| 195 // Connect and register WebSocket client. | |
| 196 wsClient.connect(signalingParameters.wssUrl, signalingParameters.wssPostUrl)
; | |
| 197 wsClient.register(connectionParameters.roomId, signalingParameters.clientId)
; | |
| 198 } | |
| 199 | |
| 200 // Send local offer SDP to the other participant. | |
| 201 @Override | |
| 202 public void sendOfferSdp(final SessionDescription sdp) { | |
| 203 executor.execute(new Runnable() { | |
| 204 @Override | |
| 205 public void run() { | |
| 206 if (roomState != ConnectionState.CONNECTED) { | |
| 207 reportError("Sending offer SDP in non connected state."); | |
| 208 return; | |
| 209 } | |
| 210 JSONObject json = new JSONObject(); | |
| 211 jsonPut(json, "sdp", sdp.description); | |
| 212 jsonPut(json, "type", "offer"); | |
| 213 sendPostMessage(MessageType.MESSAGE, messageUrl, json.toString()); | |
| 214 if (connectionParameters.loopback) { | |
| 215 // In loopback mode rename this offer to answer and route it back. | |
| 216 SessionDescription sdpAnswer = new SessionDescription( | |
| 217 SessionDescription.Type.fromCanonicalForm("answer"), | |
| 218 sdp.description); | |
| 219 events.onRemoteDescription(sdpAnswer); | |
| 220 } | |
| 221 } | |
| 222 }); | |
| 223 } | |
| 224 | |
| 225 // Send local answer SDP to the other participant. | |
| 226 @Override | |
| 227 public void sendAnswerSdp(final SessionDescription sdp) { | |
| 228 executor.execute(new Runnable() { | |
| 229 @Override | |
| 230 public void run() { | |
| 231 if (connectionParameters.loopback) { | |
| 232 Log.e(TAG, "Sending answer in loopback mode."); | |
| 233 return; | |
| 234 } | |
| 235 JSONObject json = new JSONObject(); | |
| 236 jsonPut(json, "sdp", sdp.description); | |
| 237 jsonPut(json, "type", "answer"); | |
| 238 wsClient.send(json.toString()); | |
| 239 } | |
| 240 }); | |
| 241 } | |
| 242 | |
| 243 // Send Ice candidate to the other participant. | |
| 244 @Override | |
| 245 public void sendLocalIceCandidate(final IceCandidate candidate) { | |
| 246 executor.execute(new Runnable() { | |
| 247 @Override | |
| 248 public void run() { | |
| 249 JSONObject json = new JSONObject(); | |
| 250 jsonPut(json, "type", "candidate"); | |
| 251 jsonPut(json, "label", candidate.sdpMLineIndex); | |
| 252 jsonPut(json, "id", candidate.sdpMid); | |
| 253 jsonPut(json, "candidate", candidate.sdp); | |
| 254 if (initiator) { | |
| 255 // Call initiator sends ice candidates to GAE server. | |
| 256 if (roomState != ConnectionState.CONNECTED) { | |
| 257 reportError("Sending ICE candidate in non connected state."); | |
| 258 return; | |
| 259 } | |
| 260 sendPostMessage(MessageType.MESSAGE, messageUrl, json.toString()); | |
| 261 if (connectionParameters.loopback) { | |
| 262 events.onRemoteIceCandidate(candidate); | |
| 263 } | |
| 264 } else { | |
| 265 // Call receiver sends ice candidates to websocket server. | |
| 266 wsClient.send(json.toString()); | |
| 267 } | |
| 268 } | |
| 269 }); | |
| 270 } | |
| 271 | |
| 272 // -------------------------------------------------------------------- | |
| 273 // WebSocketChannelEvents interface implementation. | |
| 274 // All events are called by WebSocketChannelClient on a local looper thread | |
| 275 // (passed to WebSocket client constructor). | |
| 276 @Override | |
| 277 public void onWebSocketMessage(final String msg) { | |
| 278 if (wsClient.getState() != WebSocketConnectionState.REGISTERED) { | |
| 279 Log.e(TAG, "Got WebSocket message in non registered state."); | |
| 280 return; | |
| 281 } | |
| 282 try { | |
| 283 JSONObject json = new JSONObject(msg); | |
| 284 String msgText = json.getString("msg"); | |
| 285 String errorText = json.optString("error"); | |
| 286 if (msgText.length() > 0) { | |
| 287 json = new JSONObject(msgText); | |
| 288 String type = json.optString("type"); | |
| 289 if (type.equals("candidate")) { | |
| 290 IceCandidate candidate = new IceCandidate( | |
| 291 json.getString("id"), | |
| 292 json.getInt("label"), | |
| 293 json.getString("candidate")); | |
| 294 events.onRemoteIceCandidate(candidate); | |
| 295 } else if (type.equals("answer")) { | |
| 296 if (initiator) { | |
| 297 SessionDescription sdp = new SessionDescription( | |
| 298 SessionDescription.Type.fromCanonicalForm(type), | |
| 299 json.getString("sdp")); | |
| 300 events.onRemoteDescription(sdp); | |
| 301 } else { | |
| 302 reportError("Received answer for call initiator: " + msg); | |
| 303 } | |
| 304 } else if (type.equals("offer")) { | |
| 305 if (!initiator) { | |
| 306 SessionDescription sdp = new SessionDescription( | |
| 307 SessionDescription.Type.fromCanonicalForm(type), | |
| 308 json.getString("sdp")); | |
| 309 events.onRemoteDescription(sdp); | |
| 310 } else { | |
| 311 reportError("Received offer for call receiver: " + msg); | |
| 312 } | |
| 313 } else if (type.equals("bye")) { | |
| 314 events.onChannelClose(); | |
| 315 } else { | |
| 316 reportError("Unexpected WebSocket message: " + msg); | |
| 317 } | |
| 318 } else { | |
| 319 if (errorText != null && errorText.length() > 0) { | |
| 320 reportError("WebSocket error message: " + errorText); | |
| 321 } else { | |
| 322 reportError("Unexpected WebSocket message: " + msg); | |
| 323 } | |
| 324 } | |
| 325 } catch (JSONException e) { | |
| 326 reportError("WebSocket message JSON parsing error: " + e.toString()); | |
| 327 } | |
| 328 } | |
| 329 | |
| 330 @Override | |
| 331 public void onWebSocketClose() { | |
| 332 events.onChannelClose(); | |
| 333 } | |
| 334 | |
| 335 @Override | |
| 336 public void onWebSocketError(String description) { | |
| 337 reportError("WebSocket error: " + description); | |
| 338 } | |
| 339 | |
| 340 // -------------------------------------------------------------------- | |
| 341 // Helper functions. | |
| 342 private void reportError(final String errorMessage) { | |
| 343 Log.e(TAG, errorMessage); | |
| 344 executor.execute(new Runnable() { | |
| 345 @Override | |
| 346 public void run() { | |
| 347 if (roomState != ConnectionState.ERROR) { | |
| 348 roomState = ConnectionState.ERROR; | |
| 349 events.onChannelError(errorMessage); | |
| 350 } | |
| 351 } | |
| 352 }); | |
| 353 } | |
| 354 | |
| 355 // Put a |key|->|value| mapping in |json|. | |
| 356 private static void jsonPut(JSONObject json, String key, Object value) { | |
| 357 try { | |
| 358 json.put(key, value); | |
| 359 } catch (JSONException e) { | |
| 360 throw new RuntimeException(e); | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 // Send SDP or ICE candidate to a room server. | |
| 365 private void sendPostMessage( | |
| 366 final MessageType messageType, final String url, final String message) { | |
| 367 String logInfo = url; | |
| 368 if (message != null) { | |
| 369 logInfo += ". Message: " + message; | |
| 370 } | |
| 371 Log.d(TAG, "C->GAE: " + logInfo); | |
| 372 AsyncHttpURLConnection httpConnection = new AsyncHttpURLConnection( | |
| 373 "POST", url, message, new AsyncHttpEvents() { | |
| 374 @Override | |
| 375 public void onHttpError(String errorMessage) { | |
| 376 reportError("GAE POST error: " + errorMessage); | |
| 377 } | |
| 378 | |
| 379 @Override | |
| 380 public void onHttpComplete(String response) { | |
| 381 if (messageType == MessageType.MESSAGE) { | |
| 382 try { | |
| 383 JSONObject roomJson = new JSONObject(response); | |
| 384 String result = roomJson.getString("result"); | |
| 385 if (!result.equals("SUCCESS")) { | |
| 386 reportError("GAE POST error: " + result); | |
| 387 } | |
| 388 } catch (JSONException e) { | |
| 389 reportError("GAE POST JSON error: " + e.toString()); | |
| 390 } | |
| 391 } | |
| 392 } | |
| 393 }); | |
| 394 httpConnection.send(); | |
| 395 } | |
| 396 } | |
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Chromium Code Reviews
Issue 1235563006:
Move talk/examples/* to webrtc/examples. (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master