Nodejs cannot load the page when I connect to MySQL? - mysql

Question

I can run other programs on node.js with no problem. When I want to connect to MySQL through NODE.js it loads forever when I type nodejs mysqlConnection.js in terminal and http://localhost:8080/ in browser.
My Code is as below:
// Include http module,
var http = require('http'),
// And mysql module you've just installed.
mysql = require("mysql");
// Create the connection.
// Data is default to new mysql installation and should be changed according to your configuration.
var connection = mysql.createConnection({
user: "root",
password: "",
database: "framework"
});
// Create the http server.
http.createServer(function (request, response) {
// Attach listener on end event.
request.on('end', function () {
// Query the database.
connection.query('SELECT * FROM words;', function (error, rows, fields) {
response.writeHead(200, {
'Content-Type': 'x-application/json'
});
// Send data as JSON string.
// Rows variable holds the result of the query.
response.end(JSON.stringify(rows));
});
});
// Listen on the 8080 port.
}).listen(8080);
NB: MySQL connection is correct because I connect to my database via PHP with no problem.
NB: I have a folder named node_modules beside to my js file, inside it I have mysql folder.
I tried to install nodejs through npm:

Answer 1

A request is ended only when the response has been sent.
You're waiting for the end event without ever sending a response (because that response is sent from within the end handler, resulting in a sort of deadlock situation).
As #vkurchatkin points out in the comments, if the request stream is being consumed, the end handler will be called once it has been consumed entirely, independent of the state of the response. In this case, the request wasn't being consumed at all, meaning that the end handler would have been called (as part of the request teardown, probably) only after the response was sent.
So removing the end handler altogether should fix the problem:
http.createServer(function (request, response) {
connection.query(..., function(error, rows, fields) {
// TODO: handle `error`
response.writeHead(200, {
'Content-Type': 'x-application/json'
});
response.end(JSON.stringify(rows));
});
});