corp-middleware

HTTP cross-origin resource policy(CORP) middleware.

Compliant with Fetch, 3.6. Cross-Origin-Resource-Policy header.

Middleware

For a definition of Universal HTTP middleware, see the http-middleware project.

Usage

Middleware adds the Cross-Origin-Resource-Policy header to the response.

import {
  corp,
  type Handler,
} from "https://deno.land/x/corp_middleware@$VERSION/mod.ts";
import { assert } from "https://deno.land/std/testing/asserts.ts";

declare const request: Request;
declare const handler: Handler;

const middleware = corp();
const response = await middleware(request, handler);

assert(response.headers.has("cross-origin-resource-policy"));

yield:

Cross-Origin-Resource-Policy: same-origin

The default field value is same-origin.

Policy

To change the corp policy, do the following:

import {
  corp,
} from "https://deno.land/x/corp_middleware@$VERSION/middleware.ts";

const middleware = corp("cross-origin");

yield:

Cross-Origin-Resource-Policy: cross-origin

Conditions

Middleware will execute if all of the following conditions are met:

Response does not include Cross-Origin-Resource-Policy header

Effects

Middleware may make changes to the following elements of the HTTP message.

HTTP Headers
- Cross-Origin-Resource-Policy

API

All APIs can be found in the deno doc.

License

Released under the MIT license