tiny-essentials
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Collection of small, essential scripts designed to be used across various projects. These simple utilities are crafted for speed, ease of use, and versatility.
29 lines (28 loc) • 1.4 kB
JavaScript
// @ts-nocheck
// https://stackoverflow.com/questions/34212039/redirect-to-firebase-hosting-custom-domain
/**
* Redirects requests from invalid domains to a specified base URL or calls a callback function.
* This middleware checks the 'x-forwarded-host' header of incoming requests and compares it to a list of valid domains.
* If the domain is invalid, it either redirects to the base URL or calls a provided callback.
*
* @param {string[]} [domains=['localhost:5000', 'example.com']] - A list of valid domains that the request must come from.
* @param {string} [baseurl='https://example.com/'] - The URL to redirect invalid requests to.
* @param {Function} [callback] - An optional callback function that is called when an invalid domain is detected.
*
* @returns {Function} A middleware function for use in an Express.js application.
*/
export default function domainRedirect(domains = ['localhost:5000', 'example.com'], baseurl = 'https://example.com/', callback) {
return (req, res, next) => {
// Invalid Domain Detected
if (!domains.includes(req.headers['x-forwarded-host'])) {
// No Callback
if (typeof callback !== 'function')
return res.status(301).redirect(baseurl + req.url);
// Yes
else
callback(req, res, next);
}
// Complete
return next();
};
}