archive replay: add HLS DVR serve path and web mode

deploy/cloudflare-worker/src/index.ts

@@ -106,6 +106,35 @@ export default {
       return stub.fetch(request);
     }
 
+    // Archive replay proxy. Forwards website requests to an archive replay origin
+    // (typically forge running `ec-node wt-archive-serve`).
+    if (url.pathname.startsWith("/api/archive/")) {
+      const origin = env.EC_ARCHIVE_ORIGIN?.trim();
+      if (!origin) {
+        return jsonNoStore({ error: "archive origin not configured" }, { status: 503 });
+      }
+      let base: URL;
+      try {
+        base = new URL(origin);
+      } catch {
+        return jsonNoStore({ error: "invalid archive origin" }, { status: 500 });
+      }
+      const target = new URL(base.toString());
+      const suffix = url.pathname.slice("/api/archive".length);
+      target.pathname = `${base.pathname.replace(/\/$/, "")}/archive${suffix}`;
+      target.search = url.search;
+
+      const upstream = await fetch(new Request(target.toString(), request), {
+        cf: { cacheTtl: 0, cacheEverything: false },
+      });
+      const headers = new Headers(upstream.headers);
+      headers.set("cache-control", "no-store");
+      return new Response(upstream.body, {
+        status: upstream.status,
+        headers,
+      });
+    }
+
     // Minimal bootstrap API: proxy /api/* to a single durable object instance ("global").
     // This exists only to rendezvous WebRTC offers/answers and list "live" entries.
     if (url.pathname.startsWith("/api/")) {
@@ -152,6 +181,7 @@ interface Env {
   EC_TURN_HOST?: string;
   EC_TURN_HMAC?: string;
   EC_STREAM_UPSERT_TOKEN?: string;
+  EC_ARCHIVE_ORIGIN?: string;
 }
 
 type DirectoryEntry = {

deploy/cloudflare-worker/wrangler.toml

@@ -37,3 +37,6 @@ new_sqlite_classes = ["EcApiContainer"]
 [[migrations]]
 tag = "v4"
 new_sqlite_classes = ["StreamRelayDO"]
+
+[vars]
+EC_ARCHIVE_ORIGIN = "https://archive.every.channel"