Now, it is the time for database (mysql) access. Yes, now we will access database and show it to pages. In my previous tutorial, I already explained page creation and handling requests. Here, to access database we need driver and a connection string. Driver will do all the work for you and make the thing very easy and smooth.
See the code-
var http = require('http');
var sys = require('util');
var hash=require('./hashish'); //lib can be downloaded [here ‘./’ part is showing location of the library.
//I stored the lib in application directory.]
var qs = require('querystring');
var mysql = require('./mysql'); //lib can be down loadded
//----Create mysql client using mysql lib
//===========================================================
var client = mysql.createClient({
user: 'root', //-------will change as per mysql server user and password
password: 'root'
});
//----------Connect to Database
//===============================================================
function db (client)
{// use myDB database from mysql
client.query('USE myDB, function(error, results) {
if(error) {
console.log('Error: ' + error.message);
client.end();
return;
}
});
}
//----------------------set data to title_tbl
function SetData (client)
{
var values = ['1', '2', 'technobelities'];
client.query('INSERT INTO title_tbl SET company_id = ?, title_id = ? , description = ?', values,
function(error, results) {
if(error) {
console.log("Error: " + error.message);
client.end();
return;
}
console.log(' Inserted Data: ' + results.affectedRows + ' row.');
console.log(' inserted Id: ' + results.insertId);
}
);
GetData(client);
}
//---------------------get data from db
function GetData (client,res)
{
var data="";
client.query(
'SELECT * FROM title_tbl',
function selectCb(error, results, fields) {
if (error) {
console.log(' Error: ' + error.message);
client.end();
return;
}
if(results.length > 0)
{
var firstResult = results[0];
data= (' Company id: ' + firstResult['company_id'] + ';') +dataContent;
data=('Description: ' + firstResult['description']+ ';') +dataContent;
res.end(data);
}
console.log(data);
});
client.end();
console.log('Connection closed');
return data;
}
var server = http.createServer(function(req, res) {
db(client);
GetData(client);
});
server.listen(8000);
Its …done. Try to customize code as par requirement. Feel free to ask any query.
