CODEWITHSUNDEEP
javascriptjsonnode.js
GINGERT
GINGERT

Reputation: 35

JSON string altered during post request

I am trying to send following Javascript object from one local nodejs (express) instance to another.

var v = {
    items: [{
        id: "fil1",
        values: [
            { key: "123", timestamp: 333, value: "aaa" },
            { key: "123", timestamp: 333, value: "aaa" },
            { key: "123", timestamp: 333, value: "aaa" },
            { key: "123", timestamp: 333, value: "aaa" }
        ]
    }]
};

I use the following post request where request = require('request'), and params is the JSON.stringified version of the object v above. 

var performPostRequest = function (ip, port, endpoint, params, callback) {
var url = "http://" + ip + ":" + port + "/" + endpoint;
request.post({
    url: url,
    form: params,
    headers: {
        'Accept': 'application/json',
        'Content-Type': 'application/json'
    }
}, function (err, response, body) {
    if (err) {
        callback(err, body);
    }
    if (body) {
        callback(err, JSON.parse(body));
    }
});
};

The receiving endpoint looks like this:

router.post('/values', function (req, res) {

    console.log(req.body);

    res.status(201).send("");
});

Where router is express.Router().

So, to my question : When printing JSON.stringify(v) at the sender, the result is a string matching the object v, but when printing the body of the request at the receiving endpoint, the string is messed up (see below). What am I doing wrong?

JSON.stringify(v) on sender:

{"items":[{"id":"fil1","values":[{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"}]}]}

req.body at receiver:

{ '{"items":': { '{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"},{"key":"123","timestamp":333,"value":"aaa"}': '' } }

Upvotes: 1

Views: 177

Answers (1)

Bertrand Martel
Bertrand Martel

Reputation: 45433

You can send JSON using request using json option that takes care of everything, from request doc :

json - sets body to JSON representation of value and adds Content-type: application/json header. Additionally, parses the response body as JSON.

var request = require('request');

var options = {
    url: url,
    method: 'POST',
    json: {
        items: [{
            id: "fil1",
            values: [
                { key: "123", timestamp: 333, value: "aaa" },
                { key: "123", timestamp: 333, value: "aaa" },
                { key: "123", timestamp: 333, value: "aaa" },
                { key: "123", timestamp: 333, value: "aaa" }
            ]
        }]
    };
};

request(options, function(error, response, body) {
    if (error) {
        callback(err, body);
    }
    if (body) {
        callback(error, body);
    }
});

Upvotes: 1

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