Extend remote debugger communication protocol for supporting messages

larger than 65536 characters (limitation of web sockets).

teavm-chrome-rdp/src/main/java/org/teavm/chromerdp/ChromeRDPDebuggerEndpoint.java

@@ -27,9 +27,11 @@
  */
 @ServerEndpoint("/")
 public class ChromeRDPDebuggerEndpoint implements ChromeRDPExchange {
+    public static final int MAX_MESSAGE_SIZE = 65534;
     private Session session;
     private ChromeRDPExchangeConsumer debugger;
     private List<ChromeRDPExchangeListener> listeners = new ArrayList<>();
+    private StringBuilder messageBuffer = new StringBuilder();
 
     @OnOpen
     public void open(Session session) {
@@ -61,14 +63,26 @@ public void disconnect() {
 
     @OnMessage
     public void receive(String message) throws IOException {
-        for (ChromeRDPExchangeListener listener : listeners) {
-            listener.received(message);
+        char ctl = message.charAt(0);
+        messageBuffer.append(message.substring(1));
+        if (ctl == '.') {
+            message = messageBuffer.toString();
+            for (ChromeRDPExchangeListener listener : listeners) {
+                listener.received(message);
+            }
+            messageBuffer = new StringBuilder();
         }
     }
 
     @Override
     public void send(String message) {
-        session.getAsyncRemote().sendText(message);
+        int index = 0;
+        while (message.length() - index > MAX_MESSAGE_SIZE) {
+            int next = index + MAX_MESSAGE_SIZE;
+            session.getAsyncRemote().sendText("," + message.substring(index, next));
+            index = next;
+        }
+        session.getAsyncRemote().sendText("." + message.substring(index));
     }
 
     @Override

teavm-chrome-rdp/src/main/js/chrome/main.js

@@ -9,8 +9,10 @@ function DebuggerAgent(tab) {
     this.tab = null;
     this.debuggee = { tabId : tab.id };
     this.attachedToDebugger = false;
+    this.messageBuffer = "";
     debuggerAgentMap[tab.id] = this;
 }
+DebuggerAgent.MAX_MESSAGE_SIZE = 65534;
 DebuggerAgent.prototype.attach = function() {
     chrome.debugger.attach(this.debuggee, "1.0", (function(callback) {
         this.attachedToDebugger = true;
@@ -20,7 +22,13 @@ DebuggerAgent.prototype.attach = function() {
 DebuggerAgent.prototype.connectToServer = function() {
     this.connection = new WebSocket("ws://localhost:2357/");
     this.connection.onmessage = function(event) {
-        this.receiveMessage(JSON.parse(event.data));
+        var str = event.data;
+        var ctl = str.substring(0, 1);
+        this.messageBuffer += str.substring(1);
+        if (ctl == '.') {
+            this.receiveMessage(JSON.parse(this.messageBuffer));
+            this.messageBuffer = "";
+        }
     }.bind(this);
     this.connection.onclose = function(event) {
         if (this.connection != null) {
@@ -30,7 +38,7 @@ DebuggerAgent.prototype.connectToServer = function() {
     }.bind(this);
     this.connection.onopen = function() {
         for (var i = 0; i < this.pendingMessages.length; ++i) {
-            this.connection.send(JSON.stringify(this.pendingMessages[i]));
+            this.sendMessage(this.pendingMessages[i]);
         }
         this.pendingMessages = null;
     }.bind(this);
@@ -40,10 +48,19 @@ DebuggerAgent.prototype.receiveMessage = function(message) {
         if (message.id) {
             var responseToServer = { id : message.id, result : response,
                     error : response ? undefined : chrome.runtime.lastError };
-            this.connection.send(JSON.stringify(responseToServer));
+            this.sendMessage(responseToServer);
         }
     }.bind(this));
 };
+DebuggerAgent.prototype.sendMessage = function(message) {
+    var str = JSON.stringify(message);
+    while (str.length > DebuggerAgent.MAX_MESSAGE_SIZE) {
+        var part = "," + str.substring(0, DebuggerAgent.MAX_MESSAGE_SIZE);
+        this.connection.send(part);
+        str = str.substring(DebuggerAgent.MAX_MESSAGE_SIZE);
+    }
+    this.connection.send("." + str);
+}
 DebuggerAgent.prototype.disconnect = function() {
     if (this.connection) {
         var conn = this.connection;
@@ -69,7 +86,7 @@ chrome.debugger.onEvent.addListener(function(source, method, params) {
     if (agent.pendingMessages) {
         agent.pendingMessages.push(message);
     } else if (agent.connection) {
-        agent.connection.send(JSON.stringify(message));
+        agent.sendMessage(message);
     }
 });
 chrome.debugger.onDetach.addListener(function(source) {

teavm-eclipse/teavm-eclipse-core-plugin/build.properties

@@ -43,5 +43,6 @@ bin.includes = META-INF/,\
                lib/websocket-client-9.2.1.v20140609.jar,\
                lib/websocket-common-9.2.1.v20140609.jar,\
                lib/websocket-server-9.2.1.v20140609.jar,\
-               lib/websocket-servlet-9.2.1.v20140609.jar,
+               lib/websocket-servlet-9.2.1.v20140609.jar,\
+               logback.xml
 jars.compile.order = .

teavm-eclipse/teavm-eclipse-core-plugin/logback.xml

@@ -0,0 +1,25 @@
+<!--
+    Copyright 2014 Alexey Andreev.
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+<configuration>
+  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+    <encoder>
+      <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+    </encoder>
+  </appender>
+  <root level="info">
+    <appender-ref ref="STDOUT" />
+  </root>
+</configuration>