From 726fdb86a20b7dc2c52cdf16064e709f72480626 Mon Sep 17 00:00:00 2001
From: Key <keircn@proton.me>
Date: Sun, 29 Mar 2026 03:32:31 +0100
Subject: [PATCH] FileUpload: allow configuration of cors proxy (#940)

---
 src/equicordplugins/fileUpload/constants.ts   |  8 ++++++--
 src/equicordplugins/fileUpload/settings.tsx   | 19 +++++++++++++++++++
 src/equicordplugins/fileUpload/utils/s3.ts    |  3 ++-
 .../fileUpload/utils/upload.ts                |  8 +++++---
 4 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/src/equicordplugins/fileUpload/constants.ts b/src/equicordplugins/fileUpload/constants.ts
index 9742e2dbe..5934a3be9 100644
--- a/src/equicordplugins/fileUpload/constants.ts
+++ b/src/equicordplugins/fileUpload/constants.ts
@@ -6,6 +6,10 @@
 
 export const CORS_PROXY = "https://cors.keiran0.workers.dev";
 
-export function toProxiedUrl(url: string): string {
-    return `${CORS_PROXY}?url=${encodeURIComponent(url)}`;
+export function normalizeCorsProxyUrl(url?: string): string {
+    return (url?.trim() || CORS_PROXY).replace(/\/+$/, "");
+}
+
+export function toProxiedUrl(url: string, corsProxyUrl = CORS_PROXY): string {
+    return `${normalizeCorsProxyUrl(corsProxyUrl)}?url=${encodeURIComponent(url)}`;
 }
diff --git a/src/equicordplugins/fileUpload/settings.tsx b/src/equicordplugins/fileUpload/settings.tsx
index acebee402..b1aceb041 100644
--- a/src/equicordplugins/fileUpload/settings.tsx
+++ b/src/equicordplugins/fileUpload/settings.tsx
@@ -12,6 +12,7 @@ import { useForceUpdater } from "@utils/react";
 import { OptionType } from "@utils/types";
 import { React, Select, showToast, TextArea, TextInput, Toasts } from "@webpack/common";
 
+import { CORS_PROXY } from "./constants";
 import { ServiceType } from "./types";
 import { parseShareXConfig } from "./utils/sharex";
 
@@ -196,6 +197,12 @@ export const settings = definePluginSettings({
         default: false,
         hidden: true
     },
+    corsProxyUrl: {
+        type: OptionType.STRING,
+        description: "CORS proxy URL used for browser uploads",
+        default: CORS_PROXY,
+        hidden: true
+    },
     apngToGif: {
         type: OptionType.BOOLEAN,
         description: "Convert APNG uploads to GIF",
@@ -482,6 +489,18 @@ export function SettingsComponent() {
                 />
             </SettingsSection>
 
+            <SettingTextInput
+                name="CORS Proxy URL"
+                description="CORS proxy used for web uploads. Leave empty to use the default proxy"
+                value={store.corsProxyUrl || ""}
+                onChange={v => store.corsProxyUrl = v}
+                placeholder="https://your-cors-proxy.example.com"
+            />
+
+            <SettingsSection name="Default CORS Proxy Source" description="Source code for the default CORS proxy">
+                <a href="https://codeberg.org/key/corsproxy" target="_blank" rel="noreferrer">codeberg.org/key/corsproxy</a>
+            </SettingsSection>
+
             <SettingsSection tag="label" name="Convert APNG to GIF" description="Convert APNG files to GIF format" inlineSetting>
                 <Switch
                     checked={store.apngToGif}
diff --git a/src/equicordplugins/fileUpload/utils/s3.ts b/src/equicordplugins/fileUpload/utils/s3.ts
index 94462e6cb..2cc9827d3 100644
--- a/src/equicordplugins/fileUpload/utils/s3.ts
+++ b/src/equicordplugins/fileUpload/utils/s3.ts
@@ -18,6 +18,7 @@ type S3Store = {
     s3PublicUrl?: string;
     s3Prefix?: string;
     s3ForcePathStyle?: boolean;
+    corsProxyUrl?: string;
 };
 
 const textEncoder = new TextEncoder();
@@ -188,7 +189,7 @@ export async function uploadToS3(
             throw new Error(result.error || "Upload failed");
         }
     } else {
-        const response = await fetch(toProxiedUrl(uploadUrl.toString()), {
+        const response = await fetch(toProxiedUrl(uploadUrl.toString(), settings.store.corsProxyUrl), {
             method: "PUT",
             headers: requestHeaders,
             body: fileBlob
diff --git a/src/equicordplugins/fileUpload/utils/upload.ts b/src/equicordplugins/fileUpload/utils/upload.ts
index ad9c3a027..6efebcaac 100644
--- a/src/equicordplugins/fileUpload/utils/upload.ts
+++ b/src/equicordplugins/fileUpload/utils/upload.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
-import { CORS_PROXY, toProxiedUrl } from "@equicordplugins/fileUpload/constants";
+import { normalizeCorsProxyUrl, toProxiedUrl } from "@equicordplugins/fileUpload/constants";
 import { settings } from "@equicordplugins/fileUpload/settings";
 import { serviceLabels, ServiceType, ShareXUploaderConfig, UploadResponse } from "@equicordplugins/fileUpload/types";
 import { copyToClipboard } from "@utils/clipboard";
@@ -26,11 +26,13 @@ const Native = IS_DISCORD_DESKTOP
 const logger = new Logger("FileUpload", "#7cb7ff");
 
 function toProxyUrl(url: string): string {
-    if (Native || url.startsWith(`${CORS_PROXY}?url=`)) {
+    const corsProxyUrl = normalizeCorsProxyUrl((settings.store as { corsProxyUrl?: string; }).corsProxyUrl);
+
+    if (Native || url.startsWith(`${corsProxyUrl}?url=`)) {
         return url;
     }
 
-    return toProxiedUrl(url);
+    return toProxiedUrl(url, corsProxyUrl);
 }
 
 let isUploading = false;