From 485698a43cc6c308a64fa2675d174f19d78052bf Mon Sep 17 00:00:00 2001
From: mrjvs <jellevs@gmail.com>
Date: Wed, 22 Feb 2023 21:41:13 +0100
Subject: [PATCH] support for round robin proxies

---
 src/backend/helpers/fetch.ts | 11 ++++++++++-
 src/index.tsx                |  2 +-
 src/setup/config.ts          | 15 +++++++++++----
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/backend/helpers/fetch.ts b/src/backend/helpers/fetch.ts
index 9428ab03..393ff7f8 100644
--- a/src/backend/helpers/fetch.ts
+++ b/src/backend/helpers/fetch.ts
@@ -1,6 +1,15 @@
 import { conf } from "@/setup/config";
 import { ofetch } from "ofetch";
 
+let proxyUrlIndex = Math.floor(Math.random() * conf().PROXY_URLS.length);
+
+// round robins all proxy urls
+function getProxyUrl(): string {
+  const url = conf().PROXY_URLS[proxyUrlIndex];
+  proxyUrlIndex = (proxyUrlIndex + 1) % conf().PROXY_URLS.length;
+  return url;
+}
+
 type P<T> = Parameters<typeof ofetch<T>>;
 type R<T> = ReturnType<typeof ofetch<T>>;
 
@@ -41,7 +50,7 @@ export function proxiedFetch<T>(url: string, ops: P<T>[1] = {}): R<T> {
     parsedUrl.searchParams.set(k, v);
   });
 
-  return baseFetch<T>(conf().BASE_PROXY_URL, {
+  return baseFetch<T>(getProxyUrl(), {
     ...ops,
     baseURL: undefined,
     params: {
diff --git a/src/index.tsx b/src/index.tsx
index ea54335a..5d2b07a7 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -16,7 +16,7 @@ import { initializeStores } from "./utils/storage";
 const key =
   (window as any)?.__CONFIG__?.VITE_KEY ?? import.meta.env.VITE_KEY ?? null;
 if (key) {
-  (window as any).initMW(conf().BASE_PROXY_URL, key);
+  (window as any).initMW(conf().PROXY_URLS, key);
 }
 initializeChromecast();
 
diff --git a/src/setup/config.ts b/src/setup/config.ts
index 72a762f5..679e5141 100644
--- a/src/setup/config.ts
+++ b/src/setup/config.ts
@@ -10,8 +10,14 @@ interface Config {
   NORMAL_ROUTER: boolean;
 }
 
-export interface RuntimeConfig extends Config {
-  BASE_PROXY_URL: string;
+export interface RuntimeConfig {
+  APP_VERSION: string;
+  GITHUB_LINK: string;
+  DISCORD_LINK: string;
+  OMDB_API_KEY: string;
+  TMDB_API_KEY: string;
+  NORMAL_ROUTER: boolean;
+  PROXY_URLS: string[];
 }
 
 const env: Record<keyof Config, undefined | string> = {
@@ -51,8 +57,9 @@ export function conf(): RuntimeConfig {
     DISCORD_LINK,
     OMDB_API_KEY: getKey("OMDB_API_KEY"),
     TMDB_API_KEY: getKey("TMDB_API_KEY"),
-    BASE_PROXY_URL: getKey("CORS_PROXY_URL"),
-    CORS_PROXY_URL: `${getKey("CORS_PROXY_URL")}/?destination=`,
+    PROXY_URLS: getKey("CORS_PROXY_URL")
+      .split(",")
+      .map((v) => v.trim()),
     NORMAL_ROUTER: (getKey("NORMAL_ROUTER") ?? "false") === "true",
   };
 }