53 lines
1.5 KiB
TypeScript
53 lines
1.5 KiB
TypeScript
/**
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* Previews Bandcamp links from their page's OG tags, for
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* `rich-content-service.ts`.
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*
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* @module
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*/
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import type { RichContent } from "../../../shared/dump.ts";
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import type { RichContentProvider } from "./provider.ts";
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import { extractOgTag } from "../html.ts";
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import { fetchWithTimeout, readTextCapped } from "../fetch.ts";
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import { BANDCAMP_HOST_RE } from "../bandcamp-tralbum.ts";
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/**
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* Claims bandcamp.com and its subdomains, where artists have their pages, and
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* takes the embed player's URL from the page's `og:video`. The native player
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* fetches the page's streams itself at play time, through
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* `GET /api/bandcamp/tracks`.
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*/
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export const bandcampProvider: RichContentProvider = {
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name: "bandcamp",
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matches(url: string): boolean {
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try {
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return BANDCAMP_HOST_RE.test(new URL(url).hostname);
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} catch {
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return false;
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}
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},
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async fetch(url: string): Promise<RichContent> {
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const res = await fetchWithTimeout(url);
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const contentType = res.headers.get("content-type") ?? "";
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if (!contentType.startsWith("text/html")) {
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await res.body?.cancel();
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return { type: "bandcamp", siteName: "Bandcamp", url };
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}
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const html = await readTextCapped(res);
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return {
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type: "bandcamp",
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siteName: "Bandcamp",
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url,
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title: extractOgTag(html, "title"),
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description: extractOgTag(html, "description"),
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thumbnailUrl: extractOgTag(html, "image"),
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embedUrl: extractOgTag(html, "video") ?? undefined,
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};
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},
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};
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