From 3eaa783c159c8b94b9120bd4b2db64dff636a38e Mon Sep 17 00:00:00 2001
From: Ayane Satomi <chinodesuuu@gmail.com>
Date: Sat, 21 Oct 2023 14:55:25 +0000
Subject: [PATCH] feat: Added middleware for handling CORS

Added middleware for handling CORS and setting necessary headers
---
 fresh.gen.ts          |  6 ++++--
 routes/_middleware.ts | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 routes/_middleware.ts

diff --git a/fresh.gen.ts b/fresh.gen.ts
index a04a29a..1aabb31 100644
--- a/fresh.gen.ts
+++ b/fresh.gen.ts
@@ -4,7 +4,8 @@
 
 import * as $0 from "./routes/_404.tsx";
 import * as $1 from "./routes/_app.tsx";
-import * as $2 from "./routes/index.tsx";
+import * as $2 from "./routes/_middleware.ts";
+import * as $3 from "./routes/index.tsx";
 import * as $$0 from "./islands/CounterCard.tsx";
 import * as $$1 from "./islands/MarkdownContent.tsx";
 
@@ -12,7 +13,8 @@ const manifest = {
   routes: {
     "./routes/_404.tsx": $0,
     "./routes/_app.tsx": $1,
-    "./routes/index.tsx": $2,
+    "./routes/_middleware.ts": $2,
+    "./routes/index.tsx": $3,
   },
   islands: {
     "./islands/CounterCard.tsx": $$0,
diff --git a/routes/_middleware.ts b/routes/_middleware.ts
new file mode 100644
index 0000000..9c97128
--- /dev/null
+++ b/routes/_middleware.ts
@@ -0,0 +1,21 @@
+import { MiddlewareHandlerContext } from "$fresh/server.ts";
+
+export async function handler(req: Request, ctx: MiddlewareHandlerContext) {
+  const origin = req.headers.get("Origin") || "*";
+  const resp = await ctx.next();
+  const headers = resp.headers;
+
+  headers.set("Access-Control-Allow-Origin", origin);
+  headers.set("Access-Control-Allow-Credentials", "true");
+  headers.set("Cache-Control", "public, max-age=14400, stale-while-revalidate=86400");
+  headers.set(
+    "Access-Control-Allow-Headers",
+    "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With",
+  );
+  headers.set(
+    "Access-Control-Allow-Methods",
+    "POST, OPTIONS, GET",
+  );
+
+  return resp;
+}
\ No newline at end of file