Use beautiulsoup4 instead of lxml for URL previews #19301
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Use beautiulsoup4 instead of lxml for URL previews. This offers some nicer APIs when parsing HTML and avoids using llibxml, which is unmaintained.
I haven’t done a full regression against commonly previewed sites, but I expect this will give similar (or better) results.
beautiulsoup also handles decoding the charset for us, which is less custom code.