fix: only run function inject for nostr entity

functions/[id].ts

@@ -1,34 +1,37 @@
 interface Env {}
 
 export const onRequest: PagesFunction<Env> = async context => {
-  const id = context.params.id as string;
+  const id = context.params.id as string | undefined;
 
+  const prefixes = ["npub1", "nprofile1", "naddr1", "nevent1", "note1"];
   const next = await context.next();
-  try {
+  if (id && prefixes.some(a => id.startsWith(a))) {
-    const rsp = await fetch(
+    try {
-      `http://nostr.api.v0l.io/api/v1/opengraph/${id}?canonical=${encodeURIComponent("https://zap.stream/%s")}`,
+      const rsp = await fetch(
-      {
+        `http://nostr.api.v0l.io/api/v1/opengraph/${id}?canonical=${encodeURIComponent("https://zap.stream/%s")}`,
-        method: "POST",
+        {
-        body: await next.arrayBuffer(),
+          method: "POST",
-        headers: {
+          body: await next.arrayBuffer(),
-          "user-agent": "zap.stream/1.0 (https://zap.stream)",
-          "content-type": "text/html",
-          accept: "text/html",
-        },
-      }
-    );
-    if (rsp.ok) {
-      const body = await rsp.text();
-      if (body.length > 0) {
-        return new Response(body, {
           headers: {
+            "user-agent": "zap.stream/1.0 (https://zap.stream)",
             "content-type": "text/html",
+            accept: "text/html",
           },
-        });
+        }
+      );
+      if (rsp.ok) {
+        const body = await rsp.text();
+        if (body.length > 0) {
+          return new Response(body, {
+            headers: {
+              "content-type": "text/html",
+            },
+          });
+        }
       }
+    } catch {
+      // ignore
     }
-  } catch {
-    // ignore
   }
   return next;
 };