Caution when using in production
The example code contains a generic header key and value of X-Custom-PSK and mypresharedkey. To best protect your resources, change the header key and value in the Snippets editor before saving your code.
export default {
async fetch(request) {
/**
* @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";
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,
});
},
};
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