Access to headers in request-promise get response

Question

I am complete newbie to JS world. I am trying to write a test case that tests user\'s actions on a site. I am using request-promise module to test the asyn calls. I could n

Answer 1

Just passing resolveWithFullResponse: true with in the get options should fetch the response headers.

Answer 2

By default, the request-promise library returns only the response itself. You can, however, pass a simple transform function in your options, which takes three parameters and allows you to return additional stuff.

So if I wanted the headers plus the response returned to me, I would just do this:

var request = require('request-promise');
var uri = 'http://domain.name/';

var _include_headers = function(body, response, resolveWithFullResponse) {
  return {'headers': response.headers, 'data': body};
};

var options = {
  method: 'GET',
  uri: uri,
  json: true,
  transform: _include_headers,
}

return request(options)
.then(function(response) {
  console.log(response.headers);
  console.log(response.data);
});

Hope that helps.

Answer 3

By default request-promise returns just the response body from a request. To get the full response object, you can set resolveWithFulLResponse: true in the options object when making the request. Example in the docs

var request = require('request-promise');

request.get('someUrl').then(function(body) {
  // body is html or json or whatever the server responds
});

request({
  uri: 'someUrl',
  method: 'GET',
  resolveWithFullResponse: true
}).then(function(response) {
  // now you got the full response with codes etc...
});

Answer 4

Tsalikidis answer is correct. As for:

Also, can anyone please confirm, how do we know what promise returns when it is successful, is it a single value that it resolves to or all the parameters that the async function returns

A promise (Promise/A+ compliant) always return one single value. Of course this value can be a deeply nested object with tons of information in it. But .then(function(response,body){ is inherently wrong.

A library that sends back a promise should document the format of the returned object.