feat(createNodeHttpRequester): Add custom Agent support on createNodeHttpRequester (#1180)

you can now call e.g., `createNodeHttpRequester({ agent: new HttpsProxyAgent(process.env.http_proxy) })`

Co-authored-by: Haroen Viaene <[email protected]>

Author: diogolmenezes

packages/requester-node-http/src/createNodeHttpRequester.ts

@@ -1,14 +1,25 @@
+/* eslint functional/prefer-readonly-type: 0 */
 /* eslint sonarjs/cognitive-complexity: 0 */ // -->
 
 import { Destroyable, Request, Requester, Response } from '@algolia/requester-common';
 import * as http from 'http';
 import * as https from 'https';
 import * as URL from 'url';
 
-export function createNodeHttpRequester(): Requester & Destroyable {
+export type NodeHttpRequesterOptions = {
+  agent?: https.Agent | http.Agent;
+  httpAgent?: http.Agent;
+  httpsAgent?: https.Agent;
+};
+
+export function createNodeHttpRequester({
+  agent: userGlobalAgent,
+  httpAgent: userHttpAgent,
+  httpsAgent: userHttpsAgent,
+}: NodeHttpRequesterOptions = {}): Requester & Destroyable {
   const agentOptions = { keepAlive: true };
-  const httpAgent = new http.Agent(agentOptions);
-  const httpsAgent = new https.Agent(agentOptions);
+  const httpAgent = userHttpAgent || userGlobalAgent || new http.Agent(agentOptions);
+  const httpsAgent = userHttpsAgent || userGlobalAgent || new https.Agent(agentOptions);
 
   return {
     send(request: Request): Readonly<Promise<Response>> {
@@ -27,7 +38,7 @@ export function createNodeHttpRequester(): Requester & Destroyable {
         };
 
         const req = (url.protocol === 'https:' ? https : http).request(options, response => {
-          // eslint-disable-next-line functional/no-let, functional/prefer-readonly-type
+          // eslint-disable-next-line functional/no-let
           let contentBuffers: Buffer[] = [];
 
           response.on('data', chunk => {