auto-cors

A proxy to automatically add CORS headers, supports:

• Simple requests with Access-Control-Allow-Origin: "*"
• preflight requests for non-simple requests.
• POST/PUT requests with body.
• CORS requests with credentials included.

There's an auto-cors service deployed at cors.harttle.com. Both HTTP and HTTPS are supported:

• http://cors.harttle.com/https://example.com
• https://cors.harttle.com/https://example.com

AutoCORS-Cookie header

Set Cookie when forward, cookie is not allowed to be set for fetch

fetch("https://cors.harttle.com/https://example.com", {
    headers: {
        "AutoCORS-Cookie": "XXX"
    }
})

Will set a "Cookie: XXX" header when request is forwarded.

Deploy your server

Install node and npm, then run

npx auto-cors

Use AUTO_CORS_PORT (defaults to 8080) to set a different port, for example:

AUTO_CORS_PORT=8080 npx auto-cors

Visit http://localhost:8080/https://example.com in your browser.

Systemd

Here's a systemd script for auto-cors:

https://gist.github.com/harttle/a801084f42b9ee1a2aa6bf5c191b9ad9