Show signature spec

2chanhaeng · 2chanhaeng · commit a91a3a63cefd · 2026-03-22T04:51:37.000Z
diff --git a/examples/rfc-9421-test/app.ts b/examples/rfc-9421-test/app.ts
@@ -19,6 +19,7 @@ import {
   followingStore,
   onStateChange,
 } from "./federation.ts";
+import { setInboundSigSpec } from "./federation.ts";
 
 const indexHtml = await Deno.readTextFile(
   new URL("index.html", import.meta.url),
@@ -37,6 +38,19 @@ interface AppConfig {
 
 export default function createApp(fedi: Fedi, config: AppConfig) {
   const app = new Hono();
+
+  // Detect signature spec on incoming inbox POSTs before federation handles them.
+  app.use("*", async (c, next) => {
+    if (c.req.method === "POST") {
+      setInboundSigSpec(c.req.header("signature-input") != null
+        ? "rfc9421"
+        : c.req.header("signature") != null
+          ? "draft-cavage"
+          : null);
+    }
+    await next();
+  });
+
   app.use(federation(fedi, () => undefined));
 
   app.get("/", (c) => c.html(indexHtml));
diff --git a/examples/rfc-9421-test/federation.ts b/examples/rfc-9421-test/federation.ts
@@ -44,12 +44,24 @@ export function emitChange(event: string): void {
   for (const cb of changeListeners) cb(event);
 }
 
+/**
+ * Set by Hono middleware before federation handles the request, so that
+ * `logActivity` can record which signature spec was used.
+ */
+let lastInboundSigSpec: "rfc9421" | "draft-cavage" | null = null;
+export function setInboundSigSpec(
+  spec: "rfc9421" | "draft-cavage" | null,
+): void {
+  lastInboundSigSpec = spec;
+}
+
 /** Log of received activities for inspection. */
 export const activityLog: {
   timestamp: string;
   type: string;
   actorId: string | null;
   id: string | null;
+  sigSpec: "rfc9421" | "draft-cavage" | null;
   raw: Record<string, unknown>;
 }[] = [];
 
@@ -186,7 +198,9 @@ function logActivity(type: string, activity: Activity) {
     type,
     actorId: activity.actorId?.href ?? null,
     id: activity.id?.href ?? null,
+    sigSpec: lastInboundSigSpec,
     raw: {},
   });
+  lastInboundSigSpec = null;
   emitChange("log");
 }
diff --git a/examples/rfc-9421-test/index.html b/examples/rfc-9421-test/index.html
@@ -191,6 +191,15 @@
         overflow: hidden;
         text-overflow: ellipsis;
       }
+      .log-sig {
+        flex-shrink: 0;
+        font-size: 0.7rem;
+        padding: 0.05rem 0.35rem;
+        border-radius: 3px;
+        font-weight: 600;
+      }
+      .log-sig.rfc9421 { background: #d4edda; color: #155724; }
+      .log-sig.draft-cavage { background: #fff3cd; color: #856404; }
     </style>
   </head>
   <body>
@@ -421,6 +430,12 @@ <h1>RFC 9421 Field Test</h1>
               actor.textContent = entry.actorId || "";
             }
             li.append(time, " ", type, " ", actor);
+            if (entry.sigSpec) {
+              const sig = document.createElement("span");
+              sig.className = `log-sig ${entry.sigSpec}`;
+              sig.textContent = entry.sigSpec === "rfc9421" ? "RFC 9421" : "draft-cavage";
+              li.append(" ", sig);
+            }
             ul.appendChild(li);
           }
           $log.replaceChildren(ul);
