Node.js无法从浏览器执行数据库功能

Question

I have installed Node.js server with the Apache server via proxy mod and it starts fine. When I call the server.js file from console like: node /var/www/project/node/server.js I get the running notification message which is: "ok, server is running"

And when I go to browser and point to the server.js http://example.com/node/ I get status 200 and it works.

The problem, the function test is executed only when I start the server.js from console, but when I request server.js from browser or via AJAX call, then the function test is not executed. I notice that through the database entries.

I would greatly appreciate your feedback. My code is below:

var http=require('http');
var mysql = require('mysql');
var util = require('util');
var url = require('url');

var connection = mysql.createConnection({
   host     : 'localhost',
   user     : 'xxx',
   password : 'xxx',
   database : 'db_test',  //mysql database to work with (optional)
});
connection.connect(); //connect to mysql

var server=http.createServer(function(req,res){
     res.end('Connected');
});


server.on('listening',function(){
    console.log('ok, server is running');
});

server.listen(9000);



function test(){
    var s = new Date().getTime();
    connection.query('INSERT INTO table_test.emails (email) VALUES ("'+s+'")',function(err, result) {});
}

test();

Thanks.

Answer 1

The code in app.js is run when you start the server with node /var/www/project/node/server.js (The entire file is not run for each request, unlike PHP). You're telling node to listen on port 9000 and execute whatever's in your createServer callback when it receives a request. Thus, you need to put the call to test() inside your createServer callback for it to work.:

var server=http.createServer(function(req,res){
  test();
  res.end('Connected');
});