How do you properly promisify request?

The following should work:

var request = Promise.promisify(require("request"));
Promise.promisifyAll(request);

Note that this means that request is not a free function since promisification works with prototype methods since the this isn't known in advance. It will only work in newer versions of bluebird. Repeat it when you need to when forking the request object for cookies.

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If you're using Bluebird v3, you'll want to use the multiArgs option:

var request = Promise.promisify(require("request"), {multiArgs: true});
Promise.promisifyAll(request, {multiArgs: true})

This is because the callback for request is (err, response, body): the default behavior of Bluebird v3 is to only take the first success value argument (i.e. response) and to ignore the others (i.e. body).

you can use the request-promise module.

The world-famous HTTP client "Request" now Promises/A+ compliant. Powered by Bluebird.

Install the module and you can use request in promise style.

npm install request-promise

I give an example, by util base on Node.js v11.10.0

import { get, post } from "request";
import { promisify } from "util";

const [getAsync, postAsync] = [get, post].map(promisify);


getAsync("http://stackoverflow.com")
    .then(({statusCode, body}) => { 
       //do something 
     });

Or, equivalently using async/await:

const foo = async () => {
    const {statusCode, body} = await getAsync("http://stackoverflow.com")
    // do something
}

Note that you don't need the third callback parameter, body. It is also present on the response parameter. If you check the source you can see that body is just a convenience for response.body. They are guaranteed to always be the same.

This means that simple promisification as described in other answers on this page is enough to get all response data.

const request = require('request')
const { promisify } = require('util')
const rp = promisify(request)

rp('https://example.com').then(({body, statusCode}) => ...)

This is only true of the response passed to the callback/promise. The response object passed to the response event is a standard http.IncomingMessage and as such has no body property.