Bug: 482432 - WebSocket handles frames over 125 byte incorrectly

Fixed WebSocketFrame and added test to make sure that this works.

Signed-off-by: James Sutton <james.sutton@uk.ibm.com>

Author: jpwsutton

org.eclipse.paho.client.mqttv3.test/src/test/java/org/eclipse/paho/client/mqttv3/test/WebSocketTest.java

@@ -13,8 +13,11 @@
 
 package org.eclipse.paho.client.mqttv3.test;
 
+import java.io.IOException;
 import java.net.URI;
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Random;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -183,6 +186,62 @@ public void testWebSocketPubSub() throws Exception {
       }
     }
   }
+  
+  /**
+   * Tests Websocker support for packets over 16KB
+   * Prompted by Bug: 482432
+   * https://bugs.eclipse.org/bugs/show_bug.cgi?id=482432
+   * This test connects to a broker via WebSockets, subscribes
+   * to a topic, publishes a large payload to it and checks
+   * that it recieves the same payload.
+ * @throws Exception 
+   */
+  @Test
+  public void largePayloadTest() throws Exception{
+	  // Generate large byte array;
+	  byte[] largeByteArray = new byte[32000];
+	  new Random().nextBytes(largeByteArray);
+	  String methodName = Utility.getMethodName();
+	  LoggingUtilities.banner(log, cclass, methodName);
+
+	    IMqttClient client = null;
+	    try {
+	      String topicStr = "topic_largeFile_01";
+	      String clientId = methodName;
+	      client = clientFactory.createMqttClient(serverURI, clientId);
+
+	      log.info("Assigning callback...");
+	      MessageListener listener = new MessageListener();
+	      client.setCallback(listener);
+
+	      log.info("Connecting... serverURI:" + serverURI + ", ClientId:" + clientId);
+	      client.connect();
+
+	      log.info("Subscribing to..." + topicStr);
+	      client.subscribe(topicStr);
+
+	      log.info("Publishing to..." + topicStr);
+	      MqttTopic topic = client.getTopic(topicStr);
+	      MqttMessage message = new MqttMessage(largeByteArray);
+	      topic.publish(message);
+
+	      log.info("Checking msg");
+	      MqttMessage msg = listener.getNextMessage();
+	      Assert.assertNotNull(msg);
+	      Assert.assertTrue(Arrays.equals(largeByteArray, msg.getPayload()));
+	      log.info("Disconnecting...");
+	      client.disconnect();
+	      log.info("Disconnected...");
+	    } catch (Exception e){
+	    	e.printStackTrace();
+	    } finally {
+	      if (client != null) {
+	        log.info("Close...");
+	        client.close();
+	      }
+	    }
+	  
+  }
 
 
 
@@ -211,7 +270,8 @@ public MqttMessage getNextMessage() {
       synchronized (messages) {
         if (messages.size() == 0) {
           try {
-            messages.wait(1000);
+        	// Wait a bit longer than usual because of the largePayloadTest
+            messages.wait(10000);
           }
           catch (InterruptedException e) {
             // empty

org.eclipse.paho.client.mqttv3/src/main/java/org/eclipse/paho/client/mqttv3/internal/websocket/WebSocketFrame.java

@@ -144,7 +144,10 @@ public WebSocketFrame(InputStream input) throws IOException {
 		}
 
 		// Decode the payload length
-		while (--byteCount > 0){
+		if(byteCount > 0){
+			payloadLength = 0;
+		}
+		while (--byteCount >= 0){
 			maskLengthByte = (byte) input.read();
 			payloadLength |= (maskLengthByte & 0xFF) << (8 * byteCount);
 		}
@@ -157,7 +160,15 @@ public WebSocketFrame(InputStream input) throws IOException {
 		}
 
 		this.payload = new byte[payloadLength];
-		input.read(this.payload,0,payloadLength);
+		int offsetIndex = 0;
+		int tempLength = payloadLength;
+		int bytesRead = 0;
+		while (offsetIndex != payloadLength){
+				bytesRead = input.read(this.payload,offsetIndex,tempLength);
+				offsetIndex += bytesRead;
+				tempLength -= bytesRead;
+		}
+		
 
 		// Demask if needed
 		if(masked)