From 5ceaaa1eff34d031cf2878203122d7808e9bbbc5 Mon Sep 17 00:00:00 2001
From: Leo McArdle <leo@mozilla.com>
Date: Thu, 18 Jul 2024 10:28:23 +0100
Subject: [PATCH] =?UTF-8?q?fix(server):=20Inter=20wouldn't=20load=20on=20L?=
 =?UTF-8?q?inux=20=F0=9F=90=A7=20(#11491)?=
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fixes loading any file with mixed case on a case sensitive filesystem
---
 server/middlewares.ts | 35 +++++++++++++++--------------------
 1 file changed, 15 insertions(+), 20 deletions(-)

diff --git a/server/middlewares.ts b/server/middlewares.ts
index 3485becb95f2..0cae1c942f14 100644
--- a/server/middlewares.ts
+++ b/server/middlewares.ts
@@ -8,20 +8,29 @@ import { STATIC_ROOT } from "../libs/env/index.js";
 import { resolveFundamental } from "../libs/fundamental-redirects/index.js";
 import { getLocale } from "../libs/locale-utils/index.js";
 
-// Lowercase every request because every possible file we might have
-// on disk is always in lowercase.
-// This only helps when you're on a filesystem (e.g. Linux) that is case
-// sensitive.
-const slugRewrite = (req, res, next) => {
+const slugLowercase = (req, res, next) => {
   req.url = req.url.toLowerCase();
   next();
 };
 
+const staticServer = express.static(STATIC_ROOT, {
+  setHeaders: (res) => {
+    if (res.req.path.endsWith("/runner.html")) {
+      res.setHeader("Content-Security-Policy", PLAYGROUND_UNSAFE_CSP_VALUE);
+    } else {
+      res.setHeader("Content-Security-Policy", CSP_VALUE);
+    }
+  },
+});
+
+// This is necessary for case-sensitive filesystems, such as on Linux 🐧
+export const staticMiddlewares = [staticServer, slugLowercase, staticServer];
+
 /**
  * This function is returns an object with {url:string, status:number}
  * if there's some place to redirect to, otherwise an empty object.
  */
-const originRequest = (req, res, next) => {
+export const originRequestMiddleware = (req, res, next) => {
   const { url: fundamentalRedirectUrl, status } = resolveFundamental(req.url);
   if (fundamentalRedirectUrl && status) {
     res.redirect(status, fundamentalRedirectUrl);
@@ -50,17 +59,3 @@ const originRequest = (req, res, next) => {
     next();
   }
 };
-
-export const staticMiddlewares = [
-  slugRewrite,
-  express.static(STATIC_ROOT, {
-    setHeaders: (res) => {
-      if (res.req.path.endsWith("/runner.html")) {
-        res.setHeader("Content-Security-Policy", PLAYGROUND_UNSAFE_CSP_VALUE);
-      } else {
-        res.setHeader("Content-Security-Policy", CSP_VALUE);
-      }
-    },
-  }),
-];
-export const originRequestMiddleware = originRequest;