ditto/src/precheck.ts

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import { Conf } from '@/config.ts';
/** Ensure the media URL is not on the same host as the local domain. */
function checkMediaHost() {
const { url, mediaDomain } = Conf;
const mediaUrl = new URL(mediaDomain);
if (url.host === mediaUrl.host) {
throw new PrecheckError('For security reasons, MEDIA_DOMAIN cannot be on the same host as LOCAL_DOMAIN.');
}
}
/** Error class for precheck errors. */
class PrecheckError extends Error {
constructor(message: string) {
super(`${message}\nTo disable this check, set DITTO_PRECHECK="false"`);
}
}
if (Deno.env.get('DITTO_PRECHECK') !== 'false') {
checkMediaHost();
}