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import { request } from "undici";
const redirectStatuses = new Set([301, 302, 303, 307, 308]);
export async function getRedirectingURL(url, dispatcher, headers) {
const params = {
dispatcher,
method: 'HEAD',
headers,
redirect: 'manual'
};
const getParams = {
...params,
method: 'GET',
};
const callback = (r) => {
if (redirectStatuses.has(r.statusCode) && r.headers['location']) {
return r.headers['location'];
}
}
/*
try request() with HEAD & GET,
then do the same with fetch
(fetch is required for shortened reddit links)
*/
let location = await request(url, params)
.then(callback).catch(() => null);
location ??= await request(url, getParams)
.then(callback).catch(() => null);
location ??= await fetch(url, params)
.then(callback).catch(() => null);
location ??= await fetch(url, getParams)
.then(callback).catch(() => null);
return location;
}
export function merge(a, b) {
for (const k of Object.keys(b)) {
if (Array.isArray(b[k])) {
a[k] = [...(a[k] ?? []), ...b[k]];
} else if (typeof b[k] === 'object') {
a[k] = merge(a[k], b[k]);
} else {
a[k] = b[k];
}
}
return a;
}
export function splitFilenameExtension(filename) {
const parts = filename.split('.');
const ext = parts.pop();
if (!parts.length) {
return [ ext, "" ]
} else {
return [ parts.join('.'), ext ]
}
}
export function zip(a, b) {
return a.map((value, i) => [ value, b[i] ]);
}
export function isURL(input) {
try {
new URL(input);
return true;
} catch {
return false;
}
}
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