feat: add additional supported interfaces

This includes the relevant auth headers and a simplification of several others.

src/server/HttpHandler.ts

@@ -1,22 +1,8 @@
-import { IncomingMessage, ServerResponse } from 'http';
+import { AsyncHandler } from '../util/AsyncHandler';
+import { HttpRequest } from './HttpRequest';
+import { HttpResponse } from './HttpResponse';
 
 /**
  * An HTTP request handler.
  */
-export interface HttpHandler {
-  /**
-   * Checks whether this handler supports the given request.
-   * @param req - The input request.
-   *
-   * @returns A promise that indicates if this request is supported after resolving.
-   */
-  canHandle: (req: Request) => Promise<boolean>;
-  /**
-   * Handles the given request.
-   * @param req - The input request.
-   * @param res - The response needed for responding to the request.
-   *
-   * @returns A promise resolving when the handling is finished.
-   */
-  handle: (req: IncomingMessage, res: ServerResponse) => Promise<void>;
-}
+export type HttpHandler = AsyncHandler<{ request: HttpRequest; response: HttpResponse }>;

src/server/HttpRequest.ts

@@ -0,0 +1,6 @@
+import { IncomingMessage } from 'http';
+
+/**
+ * An incoming HTTP request;
+ */
+export type HttpRequest = IncomingMessage;

src/server/HttpResponse.ts

@@ -0,0 +1,6 @@
+import { OutgoingMessage } from 'http';
+
+/**
+ * An outgoing HTTP response;
+ */
+export type HttpResponse = OutgoingMessage;