Auth with headers
Allow or deny a request based on a known pre-shared key in a header. This is not meant to replace the WebCrypto API.
/** * @param {string} PRESHARED_AUTH_HEADER_KEY Custom header to check for key * @param {string} PRESHARED_AUTH_HEADER_VALUE Hard coded key value */const PRESHARED_AUTH_HEADER_KEY = "X-Custom-PSK"const PRESHARED_AUTH_HEADER_VALUE = "mypresharedkey"
async function handleRequest(request) { const psk = request.headers.get(PRESHARED_AUTH_HEADER_KEY)
if (psk === PRESHARED_AUTH_HEADER_VALUE) { // Correct preshared header key supplied. Fetch request from origin. return fetch(request) }
// Incorrect key supplied. Reject the request. return new Response("Sorry, you have supplied an invalid key.", { status: 403, })}
addEventListener("fetch", event => { event.respondWith(handleRequest(event.request))})