JSON parsing in web socket server

Question

I have created my web socket server and client using this simple tutorial here : http://cjihrig.com/blog/creating-your-own-node-js-websocket-echo-server/

But it seems like it recognises only UTF-8 characters.
I want to send JSON message in the text box:

var jsonString = JSON.stringify({"fname":"John","lname":"Smith"})

and in ws_server.js file, I have written

connection.on('message', function(message) {  
var jObject = JSON.parse(message); 
jObject.lname = "Jobs";  
}..

But I am getting error for JSON.parse method.

Please let me know what is the problem.
Or do I have to write any new server implementation for JSON parsing or JSON messages?

This is my client code: http://cjihrig.com/blog/creating-your-own-websocket-echo-client/
but value of "text" is modified to be as follows:
jsonmsg = {fname:"John",lname:"Smith"}
jsonString = JSON.stringify(jsonmsg);
So socket.send(jsonString);

Thanks
Sneha

what does the message param look like? console.log(message) and see what it looks like. — c0deNinja
– c0deNinja, Commented Jun 15, 2012 at 3:51
message param prints "Object". so it is an object and when I do console.log(message.type), it is giving me UTF-8!! — Smitha
– Smitha, Commented Jun 15, 2012 at 3:56
what happens if you don't do JSON.parse(message) and just use message.lname? — c0deNinja
– c0deNinja, Commented Jun 15, 2012 at 3:58
can you post your client code? how are you sending the message over? — c0deNinja
– c0deNinja, Commented Jun 15, 2012 at 4:12

c0deNinja · Accepted Answer · 2012-06-15 07:19:04Z

1

Have you tried:

socket.json.send( { fname : 'John', lname : 'Smith'} );

answered Jun 15, 2012 at 7:19

c0deNinja

3,9842 gold badges31 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Michelle Tilley · Accepted Answer · 2012-06-15 02:59:56Z

1

var jsonString = {"fname":"John","lname":"Smith"}

does not create a string; it creates an object. To make it a string:

var jsonString = JSON.stringify({"fname":"John","lname":"Smith"})

answered Jun 15, 2012 at 2:59

Michelle Tilley

159k40 gold badges379 silver badges312 bronze badges

yes.. I am using the same .. But I have problem with parse method at server side.