From 5f653a4c9f7c76d461ee4377fb4e025771cff872 Mon Sep 17 00:00:00 2001
From: yyamashita <yyamashita@hetzner.yyamashita.com>
Date: Wed, 17 Jun 2026 22:27:47 +0900
Subject: Add image proxy endpoint to avoid mixed content issues

Serve external event images through /api/image?url=<encoded> so HTTP
image URLs from venue sites are fetched server-side and delivered over
HTTPS. Validates Content-Type is image/*, blocks private IPs (SSRF),
and caches responses in memory (24h TTL, 200-entry LRU).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 app/lib/image-proxy.ts | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 app/lib/image-proxy.ts

(limited to 'app/lib')

diff --git a/app/lib/image-proxy.ts b/app/lib/image-proxy.ts
new file mode 100644
index 0000000..b9af3bf
--- /dev/null
+++ b/app/lib/image-proxy.ts
@@ -0,0 +1,4 @@
+export function proxyImageUrl(url: string | null | undefined): string | null {
+  if (!url) return null;
+  return `/api/image?url=${encodeURIComponent(url)}`;
+}
-- 
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