43 lines
1.2 KiB
TypeScript
43 lines
1.2 KiB
TypeScript
import db from 'mime-db';
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const MIME_OVERRIDES: Record<string, string> = {
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'audio/mpeg': 'mp3',
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'audio/ogg': '.ogg'
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};
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/**
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* Retrieve an extension for a given URL by fetching its Content-Type
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*/
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export async function getExtensionForUrl(url: string) {
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const response = await fetch(url, { method: 'HEAD' });
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const contentType = response.headers.get('Content-Type');
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// GUARD: Check that we received a content type
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if (!contentType) {
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throw new Error('Jellyfin did not return a Content-Type for a streaming URL.');
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}
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// GUARD: Check whether there is a custom override for a particular content type
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if (contentType in MIME_OVERRIDES) {
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return MIME_OVERRIDES[contentType];
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}
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// Alternatively, retrieve it from mime-db
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const extensions = db[contentType]?.extensions;
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// GUARD: Check that we received an extension
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if (!extensions?.length) {
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throw new Error(`Unsupported MIME-type ${contentType}`);
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}
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return extensions[0];
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}
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/**
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* Find a mime type by its extension
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*/
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export function getMimeTypeForExtension(extension: string) {
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return Object.keys(db).find((type) => {
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return db[type].extensions?.includes(extension);
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});
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} |