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// Copyright 2019 Yusuke Sakurai. All rights reserved. MIT license.import { HttpHandler } from "./router.ts";import { RoutingError } from "./error.ts";
/** Deny request with 404 if method doesn't match */export const methodFilter = (...method: string[]): HttpHandler => async req => {  if (!method.includes(req.method)) {    const u = new URL(req.url);    throw new RoutingError(404, `Cannot ${req.method} ${u.pathname}`);  }};
/** Deny requests with 400 if content-type doesn't match */export const contentTypeFilter = (  ...types: (string | RegExp)[]): HttpHandler => async req => {  if (types.some(v => req.headers.get("content-type").match(v) !== null)) {    return;  }  throw new RoutingError(400, `Invalid content type`);};