How to intercept third party http request in NodeJS?

Question

I need to call a third party API server in NodeJS, as you can see below, I need to use req and resp inside request() method.

Since there are a lot of APIs that I need to use, I don't want to set headers and set response cookies every time I use request().

Is there anything I can do to intercept request()?

router.post('/register', function (req, resp) {
    var api = "/user/register"
    var data = req.body)
    request({
        url: api,
        method: "POST",
        json: true,
        headers: {'session_id' : req.cookies.session_id},
        body: {
            "tel": data.tel, "code": data.code,
            "password": data.passwd, "referee": data.recommend
        }
    }, function (error, response, body) {
        resp.cookies('session_id', response.headers['sessionId'])
        resp.json(body)
    })
})

request package doesn't know nothing about express and him request and response objects, so you can't intercept. But you can create two simple functions which will extract required info from req and update res. Just call these functions in every call of request. — alexmac
– alexmac, Commented Apr 9, 2016 at 14:02

christophetd · Accepted Answer · 2016-04-09 14:40:48Z

1

If I understood correctly, you want to avoid passing the same options to request everytime?

You can simply create a helper function that will call it for you:

function apiRequest(url, req, cb) {
  request({
  url: url,
  method: "POST",
    json: true,
    headers: {'session_id' : req.cookies.session_id},
    body: {
        "tel": req.body.tel, "code": req.body.code,
        "password": req.body.passwd, "referee": req.body.recommend
    }
  }, cb)
}

// Your previous code becomes
router.post('/register', function (req, resp) {
  apiRequest("/user/register", req, function (err, response, body) {
    resp.cookies('session_id', response.headers['sessionId'])
    resp.json(body)
  })
});

Of course, it would be better if you added error handling to this (e.g. checking that req isn't undefined, that req.body.X exists, etc.)

answered Apr 9, 2016 at 14:40

christophetd

3,87422 silver badges33 bronze badges

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

Comments

nugwagon · Accepted Answer · 2016-04-09 14:43:05Z

Not very elegant, but you could always create your own wrapper around request

e.g.

myrequest.js

var request = require('request');

exports.postJsonWithCookie = function(url, payload, req, resp) {
  request({
    url: url,
    method: "POST",
    json: true,
    headers: {'session_id' : req.cookies.session_id},
    body: payload
  }, function (error, response, body) {
    resp.cookies('session_id', response.headers['sessionId'])
    resp.json(body)
  });
}

then in your route definition you could do

var request = require('./myrequest');

router.post('/register', function (req, resp) {
  var payload = {
    "tel": req.body.tel, 
    "code": req.body.code,
    "password": req.body.passwd, 
    "referee": req.body.recommend
  }
  request.postJsonWithCookie("/user/register", payload, req, resp);
});

Collectives™ on Stack Overflow

How to intercept third party http request in NodeJS?

2 Answers 2

Comments

myrequest.js

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

myrequest.js

Comments

Your Answer

Sign up or log in

Post as a guest

Related