ci: add CF Workers deploy workflow + fix relay header forwarding

.github/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy to Cloudflare Workers
+
+on:
+  push:
+    branches: [main, master]
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+        working-directory: proxy-bun
+
+      - name: Build worker
+        run: bun run build:worker
+        working-directory: proxy-bun
+
+      - name: Deploy to Cloudflare
+        run: bunx wrangler deploy
+        working-directory: proxy-bun
+        env:
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}

src/lib/relay-utils.ts

@@ -1,35 +1,7 @@
-export const ALLOWED_HEADERS = new Set([
-	"content-type",
-	"accept",
-	"accept-encoding",
-	"accept-language",
-	"user-agent",
-	"referer",
-	"origin",
-	"authorization",
-	"proxy-authorization",
-	"cache-control",
-]);
-
-export const BLOCKED_HEADERS = new Set([
+const BLOCKED_HEADERS = new Set([
 	"host",
-	"connection",
-	"keep-alive",
-	"proxy-authenticate",
-	"proxy-authorization",
-	"te",
-	"trailers",
-	"transfer-encoding",
-	"upgrade",
 	"x-relay-target",
 	"x-relay-path",
-	"cookie",
-	"set-cookie",
-	"x-real-ip",
-	"x-forwarded-for",
-	"x-forwarded-host",
-	"x-forwarded-proto",
-	"x-api-key",
 ]);
 
 export function normalizeTargetUrl(target: string | null, relayPath: string): string | null {
@@ -38,13 +10,9 @@ export function normalizeTargetUrl(target: string | null, relayPath: string): st
 }
 
 export function filterHeaders(headers: Headers): Headers {
-	const filtered = new Headers();
-	for (const [key, value] of headers.entries()) {
-		const lowerKey = key.toLowerCase();
-		if (BLOCKED_HEADERS.has(lowerKey)) continue;
-		if (lowerKey.startsWith("x-vercel-")) continue;
-		if (lowerKey.startsWith("cf-")) continue;
-		filtered.set(key, value);
+	const filtered = new Headers(headers);
+	for (const key of BLOCKED_HEADERS) {
+		filtered.delete(key);
 	}
 	return filtered;
 }
@@ -53,10 +21,7 @@ export function shouldSendBody(method: string): boolean {
 	return method !== "GET" && method !== "HEAD";
 }
 
-export function buildRelayRequest(
-	req: Request,
-	headers: Headers
-): RequestInit {
+export function buildRelayRequest(req: Request, headers: Headers): RequestInit {
 	return {
 		method: req.method,
 		headers,
@@ -76,13 +41,6 @@ export function isAllowedTarget(url: string): boolean {
 
 export function createRelayResponse(response: Response): Response {
 	const headers = new Headers(response.headers);
-	// Remove headers that would confuse the browser or were handled by the proxy
-	headers.delete("content-length");
-	headers.delete("transfer-encoding");
-	headers.delete("connection");
-	headers.delete("keep-alive");
-
-	// Add CORS for browser UI
 	headers.set("Access-Control-Allow-Origin", "*");
 	headers.set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, PATCH, OPTIONS");
 	headers.set("Access-Control-Allow-Headers", "*");