CODEWITHSUNDEEP
javascriptjsonnode.js
Christopher Allen
Christopher Allen

Reputation: 8609

Using Variable In JSON node.js

I am writing some code that allows me to send messages back and forth from two node instances using HTTP & Express.

Each client generates a UUID type of identification and then sends it to the main server for storage and authentication.

Here is the client, you can see at the bottom that it generates what i beleive to be a json string, i assign a variable before that contains an ID, i am trying to use this ID to send to the server for proccessing.

Client.js

var request = require('request');
var sendservlet = request.post;
var fs = require('fs');
var path = require('path'); 
var crypto = require('crypto');

if (fs.existsSync('foo.txt')) {
    console.log('Found ');
    fs.readFile('foo.txt', "utf-8" ,  function (err, data) {
  if (err) throw err;
  console.log(data);
});

} else {
    console.log("Did not find file, i must first register you to the server.");
    function randomValueHex (len) {
    return crypto.randomBytes(Math.ceil(len/2))
        .toString('hex') 
        .slice(0,len);   
}
var ID = randomValueHex(7)
console.log("Your New Identification Number Is: " + ID);

sendservlet(
    'http://192.168.1.225:3000',
    { form: { key: ID } },
    function (error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log(body)
            console.log(ID)
        }
    }
);
}

Server.JS

var express = require('express');
var bodyParser = require('body-parser')
var app = express();
app.use(bodyParser.urlencoded({ extended: false }));
var crypto = require('crypto');

app.post('/', function (req, res) {
  res.send('POST request to the homepage');
console.log(req.body.form.key);
});

var server = app.listen(3000, function () {
  var host = server.address().address;
  var port = server.address().port;

  console.log('Example app listening at http://%s:%s', host, port);
});

The server cannot seem to be able to read it, i believe that i cannot call the variable like that.

To help narrow this issue down, I am strictly asking why the ID variable cannot be transmitted in 

sendservlet(
        'http://192.168.1.225:3000',
        { form: { key: ID } },

thank you very much for any advice available!

Upvotes: 3

Views: 1385

Answers (1)

Trott
Trott

Reputation: 70163

Instead of console.log(req.body.form.key);, you just want console.log(req.body.key);

The form key is just what request uses for (basically) "This is my form data, so this is the stuff to POST to the URL." Whatever was in form on the request side just gets put into req.body on the express side. So you want req.body.key.

Upvotes: 2

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