Run Node.Js on localhost - node.js

Question

i created a node.js code that listen to sql server and access it database and im trying to run the code on browser using "http://localhost:1433/test" but it always giving men this
this is my node.js code:
const uid = require('uuid');
const express = require('express');
const bodyParser = require('body-parser');
const sql = require('mssql');
const driver = require('msnodesqlv8');
const config = {
// multipleStatements: true, TO EXECUTE MORE THAN ONE QUERY IN ONE STATEMENT
//driver: 'msnodesqlv8',
server: 'MOSTAFA',
user: 'admin',
password: 'mostafabaron123#',
database: 'WholeSale',
options:{
trustedConnection: true,
useUTC: true,
}
};
const userExistCode = 200;
const buyerCreatedCode = 400;
const buyerNotCreatedCode = 401;
const sellerCreatedCode = 500;
const sellerNotCreatedCode = 501;
const connectionErrCode = 100;
var app = express();
app.use(bodyParser.json()); // accept JSON parms
app.use(bodyParser.urlencoded({extended:true}));
// bueyer signup part
app.post('/buyerSignUp', function(req, res) {
var postData = req.body; // get post params
var userId = uid.v4();
sql.connect(config, (err)=>{
if(err){
console.log('not connected');
return;
}
var request = new sql.Request();
request.input('email', sql.VarChar(45), postData.email)
.input('password', sql.VarChar(45), postData.password)
.input('category', sql.VarChar(45), postData.category)
.query('select * from Buyer where email = #email and category = #category
and password = #password'
, (err, recordSet)=>{
if(recordSet.length == 1){
res.status(userExistCode).send("Buyer already exists.");
}else{
new sql.Request()
.input('buyerId', sql.VarChar(45), userId)
.input('firstName', sql.VarChar(45), postData.firstName)
.input('lastName', sql.VarChar(45), postData.lastName)
.input('email', sql.VarChar(45), postData.email)
.input('password', sql.VarChar(45), postData.password)
.input('phoneNumber', sql.VarChar(45), postData.phoneNumber)
.input('category', sql.VarChar(45), postData.category)
.query('insert into Buyer(buyer_id, first_name, last_name, email,
password, phone_number, category) values(#buyerId, #firstName,
#lastName, #email, #password, #phoneNumber, #category)'
, (err, recordSet)=>{
if(err){
console.log(err);
return;
}
if(recordSet.length == 1){
res.status(buyerCreatedCode).send("Account Created as Buyer.");
}else{
res.status(buyerNotCreatedCode).send("Account not Created as
Buyer.");
}
});
}
});
});
});
app.listen(1433, ()=>{
console.log('server is running on 1433...');
});
what i expect to see the messages if the user created or already existed.
anyone can explain why this is happening?

Answer 1

Just from reading your code, here is what I suspect is happening: you are starting up express and listening to port 1433. It does successfully call your listening callback and print the appropriate console.log statement, so we know it gets that far.
Then, you attempt to connect to your database. Your database port is also 1433, which we know is not correct (the database port cannot be the same as your express port, if it was, express would never have started). So your connection to the database fails.
The database connection callback checks for an error, then returns. This means you'll never see the "connected" console.log statement, and you'll never actually create the route for /buyerSignup. Basically, your app is running, but has no useful routes.
(I'm not sure what you even expect to see at the URL /test -- nothing in this code snippet shows you creating that route. But, you'll need to fix the issues above in any case.)