Implement /oauth2/token endpoint; token auth middleware

src/http/lifecycle/Response.ts

@@ -109,6 +109,20 @@ export class Response {
         return this
     }
 
+    /**
+     * Remove a header from the response by name.
+     * @param name
+     */
+    public unsetHeader(name: string): this {
+        this.logging.verbose(`Will unset header on response: ${name}`)
+        if ( this.sentHeaders ) {
+            throw new HeadersAlreadySentError(this, name)
+        }
+
+        delete this.headers[name]
+        return this
+    }
+
     /**
      * Bulk set the specified headers in the response.
      * @param data

src/http/routing/Route.ts

@@ -372,21 +372,37 @@ export class Route<TReturn extends ResponseObject, THandlerParams extends unknow
         return this as HandledRoute<TReturn, THandlerParams>
     }
 
-    public pre(middleware: Instantiable<Middleware>): this {
-        this.preflight.prepend(request => request.make<Middleware>(middleware, request).apply())
+    public pre(middleware: Instantiable<Middleware>|Constructable<Middleware>): this {
+        let name: string
+        if ( middleware instanceof Pipeline ) {
+            this.preflight.prepend(request => middleware.apply(request).apply())
+            name = '(unknown pipeline)'
+        } else {
+            this.preflight.prepend(request => request.make<Middleware>(middleware, request).apply())
+            name = middleware.name
+        }
+
         this.displays.push({
             stage: 'pre',
-            display: `${middleware.name}`,
+            display: name,
         })
 
         return this
     }
 
-    public post(middleware: Instantiable<Middleware>): this {
-        this.postflight.push(request => request.make<Middleware>(middleware, request).apply())
+    public post(middleware: Instantiable<Middleware>|Constructable<Middleware>): this {
+        let name: string
+        if ( middleware instanceof Pipeline ) {
+            this.postflight.push(request => middleware.apply(request).apply())
+            name = '(unknown pipeline)'
+        } else {
+            this.preflight.push(request => request.make<Middleware>(middleware, request).apply())
+            name = middleware.name
+        }
+
         this.displays.push({
-            stage: 'pre',
-            display: `${middleware.name}`,
+            stage: 'post',
+            display: name,
         })
 
         return this