Cannot Get in Node Js
Question
I am new to node js and creating a simple application to query data stored in database(MySql).So what i am doing is, I have created a database named stock and i am querying it using index.html to show it at get.html but after executing the get request i am not able to get the result. Here is my app.js
const express=require('express');
const app=express();
const port= 5050;
const bodyParser=require("body-parser");
app.use(bodyParser.urlencoded({extended:false}));
app.get('/',(req,res)=>res.sendFile(__dirname + '/index.html'));
app.post('/get',function(req,res){
const mysql=require('mysql');
const con=mysql.createConnection({
host:"localhost",
user:"root",
password:"abc123",
database:"abc",
});
con.connect(function(err){
if(err) throw err;
console.log("Connected");
let sqlQuery='SELECT * FROM stock';
con.query(sqlQuery,(err,rows)=>{
if(err) throw err;
console.log('Data Received:-');
console.log(rows);
});
});
});
app.listen(port);
My Index.html:-
<!DOCTYPE html>
<html>
<head>
<title>My node js app</title>
</head>
<body>
<form action="/get" method="get">
<h1>Welcome to Stock manipulation</h1><br></br>
Select option<select>
<option value=0>Get</option></select>
<input type="submit" id="query" value="get Result">
</body>
</html>
And my get.html
<!DOCTYPE html>
<html>
<head>
<title>Get</title>
</head>
<body>
</body>
</html>
And here is the data stored at database
[ RowDataPacket { id: 1, type: 'BSE' },
RowDataPacket { id: 2, type: 'NSE' } ]
The error i am getting after Submitting the request is
2 answers
solution1
0 2020-06-08 19:06:10
change
<form action="/get" method="get">
to
<form action="/get" method="post">
as you have defined the /get route ( app.post('/get',function(req,res){/*..*/}) )
to accept only post requests
Also in your /get route handler you should output something. Right now you do not output anything, only log to the node.js console
solution2
0 2020-06-08 19:08:06
What is your nodejs server saying? In your routes you typically want to return some data. for example in your case your /get route res.send(data). that way your front end can show the data received. Also looks like you need to change your form to be a post not a get (Edit: As Nikos M. mentioned).
If you are new to http requests I recommend downloading Postman to get used to testing your routes requests.
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