Javascript: sending variables from client to express.js

Question

I cannot send a variable from a js application to node.js server. Here is my code:

//client side

$.get('http://smart-shopper.ro/messages?from=lastGeneralTimeStamp', datas => {
      console.log("data este " + datas)
})
//and server side:

app.get('/messages/:from', (req, res) => {
    let lastGeneralTimeStamp = req.parms.from;
     var sql = `select * from chat where data > '${lastGeneralTimeStamp}' order by id ASC `;
    con.query(sql, (err, result) => {
        if (err) throw err;
       // res.send(result);
       res.send(result);
        console.log(result)
    })
})

Can anyone help me?

Thanks

Use req.query as indicated in the answer below. Notwithstanding that, you've misspelled req.params (you wrote req.parms. — Fissure King
– Fissure King, Commented Jul 18, 2018 at 13:55

Bola · Accepted Answer · 2018-07-18 13:40:07Z

5

You are doing GET to: http://smart-shopper.ro/messages?from=lastGeneralTimeStamp

which is query param with the name from. To access query params you cant use

let lastGeneralTimeStamp = req.parms.from;

but rather

req.query.<name_of_query_param>

in your case its:

req.query.from

answered Jul 18, 2018 at 13:40

Bola

7781 gold badge7 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Fissure King Over a year ago

In addition, req.params was misspelled (it was req.parms).

rafaelncarvalho · Accepted Answer · 2018-07-18 14:01:24Z

You are passing data as querystring, but your API on server side is listening data as param.

Change the request in client side:

//client side

$.get('http://smart-shopper.ro/messages/lastGeneralTimeStamp', datas => {
      console.log("data este " + datas)
})
//and server side:

app.get('/messages/:from', (req, res) => {
    let lastGeneralTimeStamp = req.params.from;
     var sql = `select * from chat where data > '${lastGeneralTimeStamp}' order by id ASC `;
    con.query(sql, (err, result) => {
        if (err) throw err;
       // res.send(result);
       res.send(result);
        console.log(result)
    })
})

Or server side API:

//client side

$.get('http://smart-shopper.ro/messages?from=lastGeneralTimeStamp', datas => {
      console.log("data este " + datas)
})
//and server side:

app.get('/messages', (req, res) => {
    let lastGeneralTimeStamp = req.query.from;
     var sql = `select * from chat where data > '${lastGeneralTimeStamp}' order by id ASC `;
    con.query(sql, (err, result) => {
        if (err) throw err;
       // res.send(result);
       res.send(result);
        console.log(result)
    })
})

arjabbar · Accepted Answer · 2018-07-18 13:39:42Z

1

Try using req.query instead of req.params.

According to this documentation that's how you access the query string.

answered Jul 18, 2018 at 13:39

arjabbar

6,4444 gold badges33 silver badges46 bronze badges

Comments

Cesar N Mejia Leiva · Accepted Answer · 2018-07-18 13:39:20Z

0

Possible typo: req.params.from not req.parms.from

answered Jul 18, 2018 at 13:39

Cesar N Mejia Leiva

1,7211 gold badge15 silver badges22 bronze badges

Collectives™ on Stack Overflow

Javascript: sending variables from client to express.js

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related