Add auth controls and headers

source/services/route-stream.ts

@@ -1,7 +1,10 @@
-import type { RouteSendOptions, RouteStream } from '../routes/types.ts';
+import type { RequestHeaders, RouteSendOptions, RouteStream } from '../routes/types.ts';
 import type { BaseStream } from './stream/base-stream.ts';
 import { HTTP_STATUS_CODE_NO_CONTENT, HTTP_STATUS_CODE_SUCCESS } from '../constants.ts';
 
+/** Shared immutable value used when a request supplies no headers. */
+const EMPTY_REQUEST_HEADERS: RequestHeaders = Object.freeze({});
+
 /**
  * Binds one application request to a connection-level stream.
  *
@@ -10,16 +13,24 @@ import { HTTP_STATUS_CODE_NO_CONTENT, HTTP_STATUS_CODE_SUCCESS } from '../consta
  * connection-level services such as the broadcaster.
  */
 export class ApplicationRouteStream implements RouteStream {
+    readonly headers: RequestHeaders;
+
     /**
      * @param connection - Shared transport stream backing this request.
      * @param body - Transport-decoded application payload for the route handler.
+     * @param path - Canonical application route selected for this request.
      * @param requestId - Optional correlation ID for multiplexed transports.
+     * @param headers - Transport-normalized request headers for this dispatch.
      */
     constructor(
         readonly connection: BaseStream,
         readonly body: unknown,
+        readonly path: string,
         private readonly requestId?: string,
-    ) {}
+        headers: RequestHeaders = EMPTY_REQUEST_HEADERS,
+    ) {
+        this.headers = headers === EMPTY_REQUEST_HEADERS ? headers : Object.freeze({ ...headers });
+    }
 
     /** Whether the underlying connection can deliver server-pushed events. */
     get streaming(): boolean {