diff -r 6949044415df -r 60f9aad12731 launcher/src/main/java/org/apidesign/bck2brwsr/launcher/Console.java
--- a/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/Console.java	Sun Dec 16 20:11:18 2012 +0100
+++ b/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/Console.java	Mon Dec 17 11:58:48 2012 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.bck2brwsr.launcher;
 
-import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.net.URL;
@@ -29,13 +28,11 @@
  */
 public class Console {
     public static String welcome() {
-        final String msg = "Hello from Bck2Brwsr!";
-        alert(msg);
-        return msg;
+        return "HellofromBck2Brwsr";
     }
-    
-    @JavaScriptBody(args = "msg", body = "alert(msg);")
-    private static native void alert(String msg);
+    public static String multiply() {
+        return String.valueOf(Integer.MAX_VALUE / 2 + Integer.MAX_VALUE);
+    }
     
     @JavaScriptBody(args = {"id", "attr"}, body = 
         "return window.document.getElementById(id)[attr].toString();")
@@ -44,6 +41,10 @@
     @JavaScriptBody(args = {"id", "attr", "value"}, body = 
         "window.document.getElementById(id)[attr] = value;")
     private static native void setAttr(String id, String attr, Object value);
+
+    private static void addAttr(String id, String attr, String newText) {
+        setAttr(id, attr, getAttr(id, attr) + "\n" + newText);
+    }
     
     public static void execute() throws Exception {
         String clazz = (String) getAttr("clazz", "value");
@@ -52,13 +53,41 @@
         setAttr("result", "value", res);
     }
     
-    public static void harness() {
+    public static void harness(String url) {
+        setAttr("result", "value", "Connecting to " + url);
         try {
-            URL u = new URL("/execute/data");
-            String data = (String) u.getContent(new Class[] { String.class });
-            setAttr("result", "value", data);
+            URL u = new URL(url);
+            for (;;) {
+                String data = (String) u.getContent(new Class[] { String.class });
+                addAttr("result", "value", data);
+                if (data.isEmpty()) {
+                    addAttr("result", "value", "No data, exiting");
+                    break;
+                }
+                
+                Case c = Case.parseData(data);
+                addAttr("result", "value", "className: " + c.getClassName());
+                addAttr("result", "value", "methodName: " + c.getMethodName());
+                addAttr("result", "value", "request: " + c.getRequestId());
+
+                Object result = invokeMethod(c.getClassName(), c.getMethodName());
+
+                addAttr("result", "value", "result: " + result);
+                
+                String toSend;
+                if (result == null) {
+                    toSend = "null";
+                } else {
+                    toSend = result.toString();
+                }
+                
+                addAttr("result", "value", "Sending back: " + url + "?request=" + c.getRequestId() + "&result=" + toSend);
+                u = new URL(url + "?request=" + c.getRequestId() + "&result=" + toSend);
+            }
+            
+            
         } catch (Exception ex) {
-            setAttr("result", "value", ex.getMessage());
+            addAttr("result", "value", ex.getMessage());
         }
     }
 
@@ -80,4 +109,34 @@
         }
         return res;
     }
+    
+    private static final class Case {
+        private final Object data;
+
+        private Case(Object data) {
+            this.data = data;
+        }
+        
+        public static Case parseData(String s) {
+            return new Case(toJSON(s));
+        }
+        
+        public String getMethodName() {
+            return value("methodName", data);
+        }
+
+        public String getClassName() {
+            return value("className", data);
+        }
+        
+        public String getRequestId() {
+            return value("request", data);
+        }
+        
+        @JavaScriptBody(args = "s", body = "return eval('(' + s + ')');")
+        private static native Object toJSON(String s);
+        
+        @JavaScriptBody(args = {"p", "d"}, body = "return d[p].toString();")
+        private static native String value(String p, Object d);
+    }
 }