Initial commit (by create-cloudflare CLI)

cool-dawn-3d3b/node_modules/wrangler/templates/middleware/common.ts

@@ -0,0 +1,67 @@
+export type Awaitable<T> = T | Promise<T>;
+// TODO: allow dispatching more events?
+export type Dispatcher = (
+	type: "scheduled",
+	init: { cron?: string }
+) => Awaitable<void>;
+
+export type IncomingRequest = Request<
+	unknown,
+	IncomingRequestCfProperties<unknown>
+>;
+
+export interface MiddlewareContext {
+	dispatch: Dispatcher;
+	next(request: IncomingRequest, env: any): Awaitable<Response>;
+}
+
+export type Middleware = (
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	middlewareCtx: MiddlewareContext
+) => Awaitable<Response>;
+
+const __facade_middleware__: Middleware[] = [];
+
+// The register functions allow for the insertion of one or many middleware,
+// We register internal middleware first in the stack, but have no way of controlling
+// the order that addMiddleware is run in service workers so need an internal function.
+export function __facade_register__(...args: (Middleware | Middleware[])[]) {
+	__facade_middleware__.push(...args.flat());
+}
+export function __facade_registerInternal__(
+	...args: (Middleware | Middleware[])[]
+) {
+	__facade_middleware__.unshift(...args.flat());
+}
+
+function __facade_invokeChain__(
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	dispatch: Dispatcher,
+	middlewareChain: Middleware[]
+): Awaitable<Response> {
+	const [head, ...tail] = middlewareChain;
+	const middlewareCtx: MiddlewareContext = {
+		dispatch,
+		next(newRequest, newEnv) {
+			return __facade_invokeChain__(newRequest, newEnv, ctx, dispatch, tail);
+		},
+	};
+	return head(request, env, ctx, middlewareCtx);
+}
+
+export function __facade_invoke__(
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	dispatch: Dispatcher,
+	finalMiddleware: Middleware
+): Awaitable<Response> {
+	return __facade_invokeChain__(request, env, ctx, dispatch, [
+		...__facade_middleware__,
+		finalMiddleware,
+	]);
+}