first commit

third_party/socket.io-client-cpp/test/echo_server/index.js

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+var port = 3000;
+
+var io = require('socket.io')().listen(port);
+console.log("Listening on port " + port);
+
+/* Socket.IO events */
+io.on("connection", function(socket){
+    console.log("new connection");
+    socket.on('test_text', (...args) => {
+        console.log("test text event received.", args);
+    });
+
+    socket.on('test_binary', (...args) => {
+        console.log("test binary event received", args);
+      if(args[0] instanceof Buffer)
+      {
+        console.log("test binary event received,binary length:"+ args[0].length);
+      }
+    });
+
+    socket.on('test ack',function()
+    {
+       var args =Array.prototype.slice.call(arguments);
+      if('object' == typeof args[0])
+      {
+        console.log("test combo received,object:");
+        console.log(JSON.stringify(args[0]));
+      }
+      if(args.length>1 && 'function' == typeof args[args.length - 1])
+      {
+        console.log('need ack for test combo');
+        var fn = args[args.length - 1];
+        fn('Got bin length:' + args[0].bin.length);//invoke ack callback function.
+      }
+    });
+
+  });