Allow configuring RequestHandler to use HTTP instead of HTTPS

index.d.ts

@@ -562,7 +562,9 @@ declare namespace Eris {
     decodeReasons?: boolean;
     disableLatencyCompensation?: boolean;
     domain?: string;
+    https?: boolean;
     latencyThreshold?: number;
+    port?: number;
     ratelimiterOffset?: number;
     requestTimeout?: number;
   }

lib/Client.js

@@ -104,12 +104,14 @@ class Client extends EventEmitter {
    * @arg {Function} [options.reconnectDelay] A function which returns how long the bot should wait until reconnecting to Discord
    * @arg {Number} [options.requestTimeout=15000] A number of milliseconds before requests are considered timed out. This option will stop affecting REST in a future release; that behavior is [DEPRECATED] and replaced by `options.rest.requestTimeout`
    * @arg {Object} [options.rest] Options for the REST request handler
-   * @arg {Object} [options.rest.agent] A HTTPS Agent used to proxy requests
+   * @arg {Object} [options.rest.agent] A HTTP(S) Agent used to proxy requests
    * @arg {String} [options.rest.baseURL] The base URL to use for API requests. Defaults to `/api/v${REST_VERSION}`
    * @arg {Boolean} [options.rest.decodeReasons=true] [DEPRECATED] Whether reasons should be decoded with `decodeURIComponent()` when making REST requests. This is true by default to mirror pre-0.15.0 behavior (where reasons were expected to be URI-encoded), and should be set to false once your bot code stops. Reasons will no longer be decoded in the future
    * @arg {Boolean} [options.rest.disableLatencyCompensation=false] Whether to disable the built-in latency compensator or not
    * @arg {String} [options.rest.domain="discord.com"] The domain to use for API requests
+   * @arg {Boolean} [options.rest.https=true] Whether to make requests to the Discord API over HTTPS (true) or HTTP (false)
    * @arg {Number} [options.rest.latencyThreshold=30000] The average request latency at which Eris will start emitting latency errors
+   * @arg {Number} [options.rest.port] The port to use for API requests. This should only ever be used when proxying API requests
    * @arg {Number} [options.rest.ratelimiterOffset=0] A number of milliseconds to offset the ratelimit timing calculations by
    * @arg {Number} [options.rest.requestTimeout=15000] A number of milliseconds before REST requests are considered timed out
    * @arg {Boolean} [options.restMode=false] Whether to enable getting objects over REST. Even with this option enabled, it is recommended that you check the cache first before using REST

lib/rest/RequestHandler.js

@@ -6,6 +6,7 @@ const DiscordHTTPError = require("../errors/DiscordHTTPError");
 const DiscordRESTError = require("../errors/DiscordRESTError");
 const Endpoints = require("./Endpoints");
 const HTTPS = require("https");
+const HTTP = require("http");
 const MultipartData = require("../util/MultipartData");
 const SequentialBucket = require("../util/SequentialBucket");
 const Zlib = require("zlib");
@@ -27,6 +28,7 @@ class RequestHandler {
       decodeReasons: true,
       disableLatencyCompensation: false,
       domain: "discord.com",
+      https: true,
       latencyThreshold: client.options.latencyThreshold || 30000,
       ratelimiterOffset: client.options.ratelimiterOffset || 0,
       requestTimeout: client.options.requestTimeout || 15000,
@@ -160,9 +162,12 @@ class RequestHandler {
 
         let req;
         try {
-          req = HTTPS.request({
+          const requester = this.options.https ? HTTPS : HTTP;
+
+          req = requester.request({
             method: method,
             host: this.options.domain,
+            port: this.options.port,
             path: this.options.baseURL + finalURL,
             headers: headers,
             agent: this.options.agent,