add new types for cors errors and handling; add class for handling buxt specific errors; add class for handling cors related errors

Author: mia-z

index.d.ts

@@ -57,11 +57,27 @@ export declare class BuxtServer {
 
     private registerRoutes(req: BuxtRequest, res: BuxtResponse, mappedRoute: Route): Promise<void>;
     private handleRequest(): Promise<Response> | Response;
+    private validateCors(req: Request): string;
+    private appendCorsHeaders(response: BuxtResponse, origin: string): void;
+    private handleCorsOptionsRequest(req: Request): BuxtResponse;
+    private handleCorsHeaderRequest(req: Request, res: BuxtResponse): void;
 
     listen(): Promise<void>;
     stop(): void;
 }
 
+export declare class BuxtError extends Error {
+    errorHeaders: { [key: string]: string };
+
+    constructor(message: string);
+
+    attachHeaders(response: Response): void;
+}
+
+export declare class CorsError extends BuxtError {
+    constructor(message: string);
+}
+
 export declare type RoutePath = {
     FullPath: string,
     AbsolutePath: string
@@ -77,7 +93,6 @@ export declare type RouteParameters = {
     [key: string]: string
 }
 
-
 export type BuxtConfig = {
     port: number,
     routeRoot: string,

src/BuxtError.ts

@@ -0,0 +1,12 @@
+export default class BuxtError extends Error {
+    errorHeaders: { [key: string]: string };
+
+    constructor(message: string) {
+        super(message);
+    }
+
+    attachHeaders(response: Response): void {
+        response.headers.append("Buxt-Rejection-Cause", this.name);
+        response.headers.append("Buxt-Rejection-Reason", this.message);
+    }
+}

src/errors/CorsError.ts

@@ -0,0 +1,9 @@
+import BuxtError from "../BuxtError";
+
+export default class CorsError extends BuxtError {
+    constructor(message: string) {
+        super(message);
+        this.name = "CorsError";
+        this.message = message;
+    }
+}