Apollo-server: Is there any way to specify a proxy on RESTDataSource?

[hiucimon]

Fairly new to creating Apollo servers, and trying to learn to create them properly, so working on a class using RESTDataSource to fetch data from several API's, but even internal, all my requests have to use our corporate proxies. I can't seem to see a way to get it to use them. Do I need to fall back to fetch?

[sbrichardson]

Here are a few resources about using additional options with node-fetch (the library being used to make the HTTP requests).

1. Details about passing options to node-fetch with RESTDataSource: https://github.com/apollographql/apollo-server/issues/1594
2. Options for node-fetch
3. Specifying a proxy with node-fetch

An example from ^1 above to specify a timeout:

import { RequestInit } from 'apollo-server-env'
...
const requestInit: RequestInit = {
  timeout: 1000,
  compress: true,
}
...
const result = await this.get<Item>('item', params, requestInit)

So to expand on that example, here is an excerpt of available options for node-fetch extensions:

{
    // The following properties are node-fetch extensions
    follow: 20,         // maximum redirect count. 0 to not follow redirect
    timeout: 0,         // req/res timeout in ms, it resets on redirect. 0 to disable (OS limit applies). Signal is recommended instead.
    compress: true,     // support gzip/deflate content encoding. false to disable
    size: 0,            // maximum response body size in bytes. 0 to disable
    agent: null         // http(s).Agent instance, allows custom proxy, certificate, dns lookup etc.
}

An (untested) example adding an agent setting:

# https://github.com/TooTallNate/node-https-proxy-agent
npm install https-proxy-agent

import HttpsProxyAgent  from 'https-proxy-agent'

const requestInit: RequestInit = {
  timeout: 1000,
  compress: true,
  agent: new HttpsProxyAgent('http://127.0.0.1:8580')
}

Let me know if this works for you, I'll be needing this soon for a project.

[sbrichardson]

@hiucimon Were you able to test?

[jfreyre]

Hi guys,

I tried to @sbrichardson suggestion in my an extension of RestDataSource I'm using in all my datasources and it seems to work

const { RESTDataSource } = require('apollo-datasource-rest');
const HttpsProxyAgent = require('https-proxy-agent')
const uuid = require('uuid/v1');

class MyAwesomeBaseApi extends RESTDataSource {
  willSendRequest(request) {
    request.headers.set('x-request-origin', this.context.requestOrigin);
    request.headers.set('va-request-id', this.context.requestId || uuid());
    request.agent = new HttpsProxyAgent('http://127.0.0.1:8888/')
  }

}

module.exports = MyAwesomeBaseApi