node.js + MySQL & JSON-result - Callback-issue & no response to client

Question

I\'d like to use node.js to query a mySQL-database and return the results as JSON to be used in a mobile application. Unfortunately, my request just sorta times out and the serv

Answer 1

You're following an older guide which instructs you to wait for the request's close event before sending the response, but you actually no longer need to do that.

What's happening is you aren't sending your response, so your client is timing out. Only until the client times out is when close events fires. Since the client has disconnected by the time you send your response, you don't get anything on the client and only see it in the terminal.

To fix this problem, just stop waiting for the close event and run code immediately when the request handler is called:

var http = require('http');
http.createServer(function(req, res) {
  getSQL(function(err, result) {
    res.writeHead(200, {
      'Content-Type' : 'x-application/json'
    });
    res.end(result);
  });
}).listen(3000);