BREAKING: feat(http): Request API & Middleware

_util/types.ts

@@ -0,0 +1,17 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+export type Expand<T> = T extends Record<PropertyKey, unknown>
+  ? T extends infer O ? { [K in keyof O]: O[K] }
+  : never
+  : T;
+
+export type SafeOmit<From, Omits> = Omit<
+  From,
+  CommonKeysWithSameType<Omits, From>
+>;
+
+export type CommonKeys<A, B> = keyof A & keyof B;
+
+export type CommonKeysWithSameType<T, U> = {
+  [K in CommonKeys<T, U>]: T[K] extends U[K] ? K : never;
+}[CommonKeys<T, U>];