Jake Slack | 03928ae | 2014-05-13 18:41:56 -0700 | [diff] [blame] | 1 | // |
| 2 | // ======================================================================== |
| 3 | // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| 4 | // ------------------------------------------------------------------------ |
| 5 | // All rights reserved. This program and the accompanying materials |
| 6 | // are made available under the terms of the Eclipse Public License v1.0 |
| 7 | // and Apache License v2.0 which accompanies this distribution. |
| 8 | // |
| 9 | // The Eclipse Public License is available at |
| 10 | // http://www.eclipse.org/legal/epl-v10.html |
| 11 | // |
| 12 | // The Apache License v2.0 is available at |
| 13 | // http://www.opensource.org/licenses/apache2.0.php |
| 14 | // |
| 15 | // You may elect to redistribute this code under either of these licenses. |
| 16 | // ======================================================================== |
| 17 | // |
| 18 | |
| 19 | package org.eclipse.jetty.websocket; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.net.InetSocketAddress; |
| 23 | import java.net.ProtocolException; |
| 24 | import java.net.SocketAddress; |
| 25 | import java.net.URI; |
| 26 | import java.nio.channels.ByteChannel; |
| 27 | import java.nio.channels.SocketChannel; |
| 28 | import java.util.List; |
| 29 | import java.util.Map; |
| 30 | import java.util.concurrent.ConcurrentHashMap; |
| 31 | import java.util.concurrent.CopyOnWriteArrayList; |
| 32 | import java.util.concurrent.CountDownLatch; |
| 33 | import java.util.concurrent.ExecutionException; |
| 34 | import java.util.concurrent.Future; |
| 35 | import java.util.concurrent.TimeUnit; |
| 36 | import java.util.concurrent.TimeoutException; |
| 37 | |
| 38 | import org.eclipse.jetty.util.IO; |
| 39 | import org.eclipse.jetty.util.log.Logger; |
| 40 | |
| 41 | |
| 42 | /* ------------------------------------------------------------ */ |
| 43 | /** |
| 44 | * <p>{@link WebSocketClient} allows to create multiple connections to multiple destinations |
| 45 | * that can speak the websocket protocol.</p> |
| 46 | * <p>When creating websocket connections, {@link WebSocketClient} accepts a {@link WebSocket} |
| 47 | * object (to receive events from the server), and returns a {@link WebSocket.Connection} to |
| 48 | * send data to the server.</p> |
| 49 | * <p>Example usage is as follows:</p> |
| 50 | * <pre> |
| 51 | * WebSocketClientFactory factory = new WebSocketClientFactory(); |
| 52 | * factory.start(); |
| 53 | * |
| 54 | * WebSocketClient client = factory.newWebSocketClient(); |
| 55 | * // Configure the client |
| 56 | * |
| 57 | * WebSocket.Connection connection = client.open(new URI("ws://127.0.0.1:8080/"), new WebSocket.OnTextMessage() |
| 58 | * { |
| 59 | * public void onOpen(Connection connection) |
| 60 | * { |
| 61 | * // open notification |
| 62 | * } |
| 63 | * |
| 64 | * public void onClose(int closeCode, String message) |
| 65 | * { |
| 66 | * // close notification |
| 67 | * } |
| 68 | * |
| 69 | * public void onMessage(String data) |
| 70 | * { |
| 71 | * // handle incoming message |
| 72 | * } |
| 73 | * }).get(5, TimeUnit.SECONDS); |
| 74 | * |
| 75 | * connection.sendMessage("Hello World"); |
| 76 | * </pre> |
| 77 | */ |
| 78 | public class WebSocketClient |
| 79 | { |
| 80 | private final static Logger __log = org.eclipse.jetty.util.log.Log.getLogger(WebSocketClient.class.getName()); |
| 81 | |
| 82 | private final WebSocketClientFactory _factory; |
| 83 | private final Map<String,String> _cookies=new ConcurrentHashMap<String, String>(); |
| 84 | private final List<String> _extensions=new CopyOnWriteArrayList<String>(); |
| 85 | private String _origin; |
| 86 | private String _protocol; |
| 87 | private int _maxIdleTime=-1; |
| 88 | private int _maxTextMessageSize=16*1024; |
| 89 | private int _maxBinaryMessageSize=-1; |
| 90 | private MaskGen _maskGen; |
| 91 | private SocketAddress _bindAddress; |
| 92 | |
| 93 | /* ------------------------------------------------------------ */ |
| 94 | /** |
| 95 | * <p>Creates a WebSocketClient from a private WebSocketClientFactory.</p> |
| 96 | * <p>This can be wasteful of resources if many clients are created.</p> |
| 97 | * |
| 98 | * @deprecated Use {@link WebSocketClientFactory#newWebSocketClient()} |
| 99 | * @throws Exception if the private WebSocketClientFactory fails to start |
| 100 | */ |
| 101 | @Deprecated |
| 102 | public WebSocketClient() throws Exception |
| 103 | { |
| 104 | _factory=new WebSocketClientFactory(); |
| 105 | _factory.start(); |
| 106 | _maskGen=_factory.getMaskGen(); |
| 107 | } |
| 108 | |
| 109 | /* ------------------------------------------------------------ */ |
| 110 | /** |
| 111 | * <p>Creates a WebSocketClient with shared WebSocketClientFactory.</p> |
| 112 | * |
| 113 | * @param factory the shared {@link WebSocketClientFactory} |
| 114 | */ |
| 115 | public WebSocketClient(WebSocketClientFactory factory) |
| 116 | { |
| 117 | _factory=factory; |
| 118 | _maskGen=_factory.getMaskGen(); |
| 119 | } |
| 120 | |
| 121 | /* ------------------------------------------------------------ */ |
| 122 | /** |
| 123 | * @return The WebSocketClientFactory this client was created with. |
| 124 | */ |
| 125 | public WebSocketClientFactory getFactory() |
| 126 | { |
| 127 | return _factory; |
| 128 | } |
| 129 | |
| 130 | /* ------------------------------------------------------------ */ |
| 131 | /** |
| 132 | * @return the address to bind the socket channel to |
| 133 | * @see #setBindAddress(SocketAddress) |
| 134 | */ |
| 135 | public SocketAddress getBindAddress() |
| 136 | { |
| 137 | return _bindAddress; |
| 138 | } |
| 139 | |
| 140 | /* ------------------------------------------------------------ */ |
| 141 | /** |
| 142 | * @param bindAddress the address to bind the socket channel to |
| 143 | * @see #getBindAddress() |
| 144 | */ |
| 145 | public void setBindAddress(SocketAddress bindAddress) |
| 146 | { |
| 147 | this._bindAddress = bindAddress; |
| 148 | } |
| 149 | |
| 150 | /* ------------------------------------------------------------ */ |
| 151 | /** |
| 152 | * @return The maxIdleTime in ms for connections opened by this client, |
| 153 | * or -1 if the default from {@link WebSocketClientFactory#getSelectorManager()} is used. |
| 154 | * @see #setMaxIdleTime(int) |
| 155 | */ |
| 156 | public int getMaxIdleTime() |
| 157 | { |
| 158 | return _maxIdleTime; |
| 159 | } |
| 160 | |
| 161 | /* ------------------------------------------------------------ */ |
| 162 | /** |
| 163 | * @param maxIdleTime The max idle time in ms for connections opened by this client |
| 164 | * @see #getMaxIdleTime() |
| 165 | */ |
| 166 | public void setMaxIdleTime(int maxIdleTime) |
| 167 | { |
| 168 | _maxIdleTime=maxIdleTime; |
| 169 | } |
| 170 | |
| 171 | /* ------------------------------------------------------------ */ |
| 172 | /** |
| 173 | * @return The subprotocol string for connections opened by this client. |
| 174 | * @see #setProtocol(String) |
| 175 | */ |
| 176 | public String getProtocol() |
| 177 | { |
| 178 | return _protocol; |
| 179 | } |
| 180 | |
| 181 | /* ------------------------------------------------------------ */ |
| 182 | /** |
| 183 | * @param protocol The subprotocol string for connections opened by this client. |
| 184 | * @see #getProtocol() |
| 185 | */ |
| 186 | public void setProtocol(String protocol) |
| 187 | { |
| 188 | _protocol = protocol; |
| 189 | } |
| 190 | |
| 191 | /* ------------------------------------------------------------ */ |
| 192 | /** |
| 193 | * @return The origin URI of the client |
| 194 | * @see #setOrigin(String) |
| 195 | */ |
| 196 | public String getOrigin() |
| 197 | { |
| 198 | return _origin; |
| 199 | } |
| 200 | |
| 201 | /* ------------------------------------------------------------ */ |
| 202 | /** |
| 203 | * @param origin The origin URI of the client (eg "http://example.com") |
| 204 | * @see #getOrigin() |
| 205 | */ |
| 206 | public void setOrigin(String origin) |
| 207 | { |
| 208 | _origin = origin; |
| 209 | } |
| 210 | |
| 211 | /* ------------------------------------------------------------ */ |
| 212 | /** |
| 213 | * <p>Returns the map of the cookies that are sent during the initial HTTP handshake |
| 214 | * that upgrades to the websocket protocol.</p> |
| 215 | * @return The read-write cookie map |
| 216 | */ |
| 217 | public Map<String,String> getCookies() |
| 218 | { |
| 219 | return _cookies; |
| 220 | } |
| 221 | |
| 222 | /* ------------------------------------------------------------ */ |
| 223 | /** |
| 224 | * @return The list of websocket protocol extensions |
| 225 | */ |
| 226 | public List<String> getExtensions() |
| 227 | { |
| 228 | return _extensions; |
| 229 | } |
| 230 | |
| 231 | /* ------------------------------------------------------------ */ |
| 232 | /** |
| 233 | * @return the mask generator to use, or null if not mask generator should be used |
| 234 | * @see #setMaskGen(MaskGen) |
| 235 | */ |
| 236 | public MaskGen getMaskGen() |
| 237 | { |
| 238 | return _maskGen; |
| 239 | } |
| 240 | |
| 241 | /* ------------------------------------------------------------ */ |
| 242 | /** |
| 243 | * @param maskGen the mask generator to use, or null if not mask generator should be used |
| 244 | * @see #getMaskGen() |
| 245 | */ |
| 246 | public void setMaskGen(MaskGen maskGen) |
| 247 | { |
| 248 | _maskGen = maskGen; |
| 249 | } |
| 250 | |
| 251 | /* ------------------------------------------------------------ */ |
| 252 | /** |
| 253 | * @return The initial maximum text message size (in characters) for a connection |
| 254 | */ |
| 255 | public int getMaxTextMessageSize() |
| 256 | { |
| 257 | return _maxTextMessageSize; |
| 258 | } |
| 259 | |
| 260 | /* ------------------------------------------------------------ */ |
| 261 | /** |
| 262 | * Set the initial maximum text message size for a connection. This can be changed by |
| 263 | * the application calling {@link WebSocket.Connection#setMaxTextMessageSize(int)}. |
| 264 | * @param maxTextMessageSize The default maximum text message size (in characters) for a connection |
| 265 | */ |
| 266 | public void setMaxTextMessageSize(int maxTextMessageSize) |
| 267 | { |
| 268 | _maxTextMessageSize = maxTextMessageSize; |
| 269 | } |
| 270 | |
| 271 | /* ------------------------------------------------------------ */ |
| 272 | /** |
| 273 | * @return The initial maximum binary message size (in bytes) for a connection |
| 274 | */ |
| 275 | public int getMaxBinaryMessageSize() |
| 276 | { |
| 277 | return _maxBinaryMessageSize; |
| 278 | } |
| 279 | |
| 280 | /* ------------------------------------------------------------ */ |
| 281 | /** |
| 282 | * Set the initial maximum binary message size for a connection. This can be changed by |
| 283 | * the application calling {@link WebSocket.Connection#setMaxBinaryMessageSize(int)}. |
| 284 | * @param maxBinaryMessageSize The default maximum binary message size (in bytes) for a connection |
| 285 | */ |
| 286 | public void setMaxBinaryMessageSize(int maxBinaryMessageSize) |
| 287 | { |
| 288 | _maxBinaryMessageSize = maxBinaryMessageSize; |
| 289 | } |
| 290 | |
| 291 | /* ------------------------------------------------------------ */ |
| 292 | /** |
| 293 | * <p>Opens a websocket connection to the URI and blocks until the connection is accepted or there is an error.</p> |
| 294 | * |
| 295 | * @param uri The URI to connect to. |
| 296 | * @param websocket The {@link WebSocket} instance to handle incoming events. |
| 297 | * @param maxConnectTime The interval to wait for a successful connection |
| 298 | * @param units the units of the maxConnectTime |
| 299 | * @return A {@link WebSocket.Connection} |
| 300 | * @throws IOException if the connection fails |
| 301 | * @throws InterruptedException if the thread is interrupted |
| 302 | * @throws TimeoutException if the timeout elapses before the connection is completed |
| 303 | * @see #open(URI, WebSocket) |
| 304 | */ |
| 305 | public WebSocket.Connection open(URI uri, WebSocket websocket,long maxConnectTime,TimeUnit units) throws IOException, InterruptedException, TimeoutException |
| 306 | { |
| 307 | try |
| 308 | { |
| 309 | return open(uri,websocket).get(maxConnectTime,units); |
| 310 | } |
| 311 | catch (ExecutionException e) |
| 312 | { |
| 313 | Throwable cause = e.getCause(); |
| 314 | if (cause instanceof IOException) |
| 315 | throw (IOException)cause; |
| 316 | if (cause instanceof Error) |
| 317 | throw (Error)cause; |
| 318 | if (cause instanceof RuntimeException) |
| 319 | throw (RuntimeException)cause; |
| 320 | throw new RuntimeException(cause); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | /* ------------------------------------------------------------ */ |
| 325 | /** |
| 326 | * <p>Asynchronously opens a websocket connection and returns a {@link Future} to obtain the connection.</p> |
| 327 | * <p>The caller must call {@link Future#get(long, TimeUnit)} if they wish to impose a connect timeout on the open.</p> |
| 328 | * |
| 329 | * @param uri The URI to connect to. |
| 330 | * @param websocket The {@link WebSocket} instance to handle incoming events. |
| 331 | * @return A {@link Future} to the {@link WebSocket.Connection} |
| 332 | * @throws IOException if the connection fails |
| 333 | * @see #open(URI, WebSocket, long, TimeUnit) |
| 334 | */ |
| 335 | public Future<WebSocket.Connection> open(URI uri, WebSocket websocket) throws IOException |
| 336 | { |
| 337 | if (!_factory.isStarted()) |
| 338 | throw new IllegalStateException("Factory !started"); |
| 339 | |
| 340 | InetSocketAddress address = toSocketAddress(uri); |
| 341 | |
| 342 | SocketChannel channel = null; |
| 343 | try |
| 344 | { |
| 345 | channel = SocketChannel.open(); |
| 346 | if (_bindAddress != null) |
| 347 | channel.socket().bind(_bindAddress); |
| 348 | channel.socket().setTcpNoDelay(true); |
| 349 | |
| 350 | WebSocketFuture holder = new WebSocketFuture(websocket,uri,this,channel); |
| 351 | |
| 352 | channel.configureBlocking(false); |
| 353 | channel.connect(address); |
| 354 | _factory.getSelectorManager().register(channel,holder); |
| 355 | |
| 356 | return holder; |
| 357 | } |
| 358 | catch (RuntimeException e) |
| 359 | { |
| 360 | // close the channel (prevent connection leak) |
| 361 | IO.close(channel); |
| 362 | |
| 363 | // rethrow |
| 364 | throw e; |
| 365 | } |
| 366 | catch(IOException e) |
| 367 | { |
| 368 | // close the channel (prevent connection leak) |
| 369 | IO.close(channel); |
| 370 | |
| 371 | // rethrow |
| 372 | throw e; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | public static InetSocketAddress toSocketAddress(URI uri) |
| 377 | { |
| 378 | String scheme = uri.getScheme(); |
| 379 | if (!("ws".equalsIgnoreCase(scheme) || "wss".equalsIgnoreCase(scheme))) |
| 380 | throw new IllegalArgumentException("Bad WebSocket scheme: " + scheme); |
| 381 | int port = uri.getPort(); |
| 382 | if (port == 0) |
| 383 | throw new IllegalArgumentException("Bad WebSocket port: " + port); |
| 384 | if (port < 0) |
| 385 | port = "ws".equals(scheme) ? 80 : 443; |
| 386 | |
| 387 | return new InetSocketAddress(uri.getHost(), port); |
| 388 | } |
| 389 | |
| 390 | /* ------------------------------------------------------------ */ |
| 391 | /** The Future Websocket Connection. |
| 392 | */ |
| 393 | static class WebSocketFuture implements Future<WebSocket.Connection> |
| 394 | { |
| 395 | final WebSocket _websocket; |
| 396 | final URI _uri; |
| 397 | final WebSocketClient _client; |
| 398 | final CountDownLatch _done = new CountDownLatch(1); |
| 399 | ByteChannel _channel; |
| 400 | WebSocketConnection _connection; |
| 401 | Throwable _exception; |
| 402 | |
| 403 | private WebSocketFuture(WebSocket websocket, URI uri, WebSocketClient client, ByteChannel channel) |
| 404 | { |
| 405 | _websocket=websocket; |
| 406 | _uri=uri; |
| 407 | _client=client; |
| 408 | _channel=channel; |
| 409 | } |
| 410 | |
| 411 | public void onConnection(WebSocketConnection connection) |
| 412 | { |
| 413 | try |
| 414 | { |
| 415 | _client.getFactory().addConnection(connection); |
| 416 | |
| 417 | connection.getConnection().setMaxTextMessageSize(_client.getMaxTextMessageSize()); |
| 418 | connection.getConnection().setMaxBinaryMessageSize(_client.getMaxBinaryMessageSize()); |
| 419 | |
| 420 | WebSocketConnection con; |
| 421 | synchronized (this) |
| 422 | { |
| 423 | if (_channel!=null) |
| 424 | _connection=connection; |
| 425 | con=_connection; |
| 426 | } |
| 427 | |
| 428 | if (con!=null) |
| 429 | { |
| 430 | if (_websocket instanceof WebSocket.OnFrame) |
| 431 | ((WebSocket.OnFrame)_websocket).onHandshake((WebSocket.FrameConnection)con.getConnection()); |
| 432 | |
| 433 | _websocket.onOpen(con.getConnection()); |
| 434 | } |
| 435 | } |
| 436 | finally |
| 437 | { |
| 438 | _done.countDown(); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | public void handshakeFailed(Throwable ex) |
| 443 | { |
| 444 | try |
| 445 | { |
| 446 | ByteChannel channel=null; |
| 447 | synchronized (this) |
| 448 | { |
| 449 | if (_channel!=null) |
| 450 | { |
| 451 | channel=_channel; |
| 452 | _channel=null; |
| 453 | _exception=ex; |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | if (channel!=null) |
| 458 | { |
| 459 | if (ex instanceof ProtocolException) |
| 460 | closeChannel(channel,WebSocketConnectionRFC6455.CLOSE_PROTOCOL,ex.getMessage()); |
| 461 | else |
| 462 | closeChannel(channel,WebSocketConnectionRFC6455.CLOSE_NO_CLOSE,ex.getMessage()); |
| 463 | } |
| 464 | } |
| 465 | finally |
| 466 | { |
| 467 | _done.countDown(); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | public Map<String,String> getCookies() |
| 472 | { |
| 473 | return _client.getCookies(); |
| 474 | } |
| 475 | |
| 476 | public String getProtocol() |
| 477 | { |
| 478 | return _client.getProtocol(); |
| 479 | } |
| 480 | |
| 481 | public WebSocket getWebSocket() |
| 482 | { |
| 483 | return _websocket; |
| 484 | } |
| 485 | |
| 486 | public URI getURI() |
| 487 | { |
| 488 | return _uri; |
| 489 | } |
| 490 | |
| 491 | public int getMaxIdleTime() |
| 492 | { |
| 493 | return _client.getMaxIdleTime(); |
| 494 | } |
| 495 | |
| 496 | public String getOrigin() |
| 497 | { |
| 498 | return _client.getOrigin(); |
| 499 | } |
| 500 | |
| 501 | public MaskGen getMaskGen() |
| 502 | { |
| 503 | return _client.getMaskGen(); |
| 504 | } |
| 505 | |
| 506 | @Override |
| 507 | public String toString() |
| 508 | { |
| 509 | return "[" + _uri + ","+_websocket+"]@"+hashCode(); |
| 510 | } |
| 511 | |
| 512 | public boolean cancel(boolean mayInterruptIfRunning) |
| 513 | { |
| 514 | try |
| 515 | { |
| 516 | ByteChannel channel=null; |
| 517 | synchronized (this) |
| 518 | { |
| 519 | if (_connection==null && _exception==null && _channel!=null) |
| 520 | { |
| 521 | channel=_channel; |
| 522 | _channel=null; |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | if (channel!=null) |
| 527 | { |
| 528 | closeChannel(channel,WebSocketConnectionRFC6455.CLOSE_NO_CLOSE,"cancelled"); |
| 529 | return true; |
| 530 | } |
| 531 | return false; |
| 532 | } |
| 533 | finally |
| 534 | { |
| 535 | _done.countDown(); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | public boolean isCancelled() |
| 540 | { |
| 541 | synchronized (this) |
| 542 | { |
| 543 | return _channel==null && _connection==null; |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | public boolean isDone() |
| 548 | { |
| 549 | synchronized (this) |
| 550 | { |
| 551 | return _connection!=null && _exception==null; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | public org.eclipse.jetty.websocket.WebSocket.Connection get() throws InterruptedException, ExecutionException |
| 556 | { |
| 557 | try |
| 558 | { |
| 559 | return get(Long.MAX_VALUE,TimeUnit.SECONDS); |
| 560 | } |
| 561 | catch(TimeoutException e) |
| 562 | { |
| 563 | throw new IllegalStateException("The universe has ended",e); |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | public org.eclipse.jetty.websocket.WebSocket.Connection get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, |
| 568 | TimeoutException |
| 569 | { |
| 570 | _done.await(timeout,unit); |
| 571 | ByteChannel channel=null; |
| 572 | org.eclipse.jetty.websocket.WebSocket.Connection connection=null; |
| 573 | Throwable exception; |
| 574 | synchronized (this) |
| 575 | { |
| 576 | exception=_exception; |
| 577 | if (_connection==null) |
| 578 | { |
| 579 | exception=_exception; |
| 580 | channel=_channel; |
| 581 | _channel=null; |
| 582 | } |
| 583 | else |
| 584 | connection=_connection.getConnection(); |
| 585 | } |
| 586 | |
| 587 | if (channel!=null) |
| 588 | closeChannel(channel,WebSocketConnectionRFC6455.CLOSE_NO_CLOSE,"timeout"); |
| 589 | if (exception!=null) |
| 590 | throw new ExecutionException(exception); |
| 591 | if (connection!=null) |
| 592 | return connection; |
| 593 | throw new TimeoutException(); |
| 594 | } |
| 595 | |
| 596 | private void closeChannel(ByteChannel channel,int code, String message) |
| 597 | { |
| 598 | try |
| 599 | { |
| 600 | _websocket.onClose(code,message); |
| 601 | } |
| 602 | catch(Exception e) |
| 603 | { |
| 604 | __log.warn(e); |
| 605 | } |
| 606 | |
| 607 | try |
| 608 | { |
| 609 | channel.close(); |
| 610 | } |
| 611 | catch(IOException e) |
| 612 | { |
| 613 | __log.debug(e); |
| 614 | } |
| 615 | } |
| 616 | } |
| 617 | } |