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v4: link previews are read once, in one place, and no longer take an error page, a relative image or a mask icon for the page's — each provider fetched its page and scanned it with regular expressions of its own, the generic one some fifteen times, and Bandcamp and SoundCloud read only OG tags. fetchPage (remote/fetch.ts) now fetches every page, follows redirects to the address it was served from, and refuses an error status, so a 404 or a bot challenge is unreachable rather than a preview titled "Just a moment...", and a refresh no longer overwrites good metadata with it. parsePage (remote/html.ts) reads it in one linear pass with a real attribute reader: unquoted values, a > inside quotes, og: tags under name as well as property, and nothing from comments or scripts. Every URL a page names is resolved against where it was served from, so a relative og:image works; entities are decoded in one pass, &eacute; and &rsquo; included, and one that names no character no longer fails the preview (bandcamp-tralbum.ts shares the decoder). The mask icon is no longer the favicon, JSON-LD prefers the page's node over the site's, tracking pixels and lazy placeholders aren't thumbnails, an og:url with a slug keeps the OG tags, and a <title> loses its site suffix. genericPreview is the base of the Bandcamp, SoundCloud and YouTube channel previews; SoundCloud takes www., m. and on.soundcloud.com short links, embedding the page they lead to, and Bandcamp keeps only its own player. The service tidies every preview: text on one line, titles and descriptions capped, only http(s) images and players. RichContent.type is now RichContentType, and the unused videoId is gone.

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
khannurien
2026-10-09 20:46:32 +00:00
parent b4936cccf7
commit 2c3ba6ad11
22 changed files with 1111 additions and 519 deletions
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7
api/remote/providers/provider.ts
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@@ -18,9 +18,10 @@ export interface RichContentProvider {
matches(url: string): boolean;
/**
* Returns the preview of `url`, which ends up in the dump's `rich_content` or
* the create form's preview. It rejects when the page can't be fetched, and
* the service then falls back to a stub. A page that isn't HTML yields a
* preview without metadata.
* the create form's preview. It rejects when the page can't be fetched or
* answers with an error status, and the service then falls back to a stub.
* A page that isn't HTML yields a preview without metadata. The service
* tidies what it returns, so a provider leaves text as the page wrote it.
*/
fetch(url: string): Promise<RichContent>;
}