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chore(link-preview): remove site-specific image fallback

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amblued 2026-08-21 21:22:56 +08:00
parent f36ca9317d
commit 79baf2eab7
2 changed files with 1 additions and 22 deletions
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15
internal/httpgetter/html_meta.go
View file

@ -2,7 +2,6 @@ package httpgetter
import (
"context"
"fmt"
"io"
"net"
"net/http"
@ -265,7 +264,7 @@ func (f *HTMLMetaFetcher) fetch(ctx context.Context, urlStr string) (*HTMLMeta,
oEmbed, _ = f.fetchOEmbed(ctx, endpoint)
}
meta := mergeMetadata(baseURL, oEmbed, sources.openGraph, sources.twitter, sources.jsonLD, sources.standard, siteImageSource(pageURL), sources.semantic)
meta := mergeMetadata(baseURL, oEmbed, sources.openGraph, sources.twitter, sources.jsonLD, sources.standard, sources.semantic)
return meta, nil
}
@ -396,15 +395,3 @@ func cloneHTMLMeta(meta *HTMLMeta) *HTMLMeta {
copy := *meta
return &copy
}
// siteImageSource supplies deterministic site-specific thumbnails that outrank
// the low-confidence semantic <img> fallback but lose to metadata the site
// itself declares.
func siteImageSource(pageURL *url.URL) metadataSource {
if pageURL.Hostname() == "www.youtube.com" && pageURL.Path == "/watch" {
if videoID := pageURL.Query().Get("v"); videoID != "" {
return metadataSource{image: fmt.Sprintf("https://img.youtube.com/vi/%s/mqdefault.jpg", url.PathEscape(videoID))}
}
}
return metadataSource{}
}

8
internal/httpgetter/html_meta_test.go
View file

@ -257,14 +257,6 @@ func TestHTMLMetaFetcherDefaultHeadersAndDeadline(t *testing.T) {
require.Equal(t, fetchTimeout, newHTTPClient().Timeout)
}
func TestSiteImageSourceEscapesYouTubeVideoID(t *testing.T) {
pageURL, err := url.Parse("https://www.youtube.com/watch?v=video%2Fsegment%3Fvariant")
require.NoError(t, err)
source := siteImageSource(pageURL)
require.Equal(t, "https://img.youtube.com/vi/video%2Fsegment%3Fvariant/mqdefault.jpg", source.image)
}
func TestHTMLMetaFetcherResolvesAgainstFinalResponseURL(t *testing.T) {
fetcher := newTestFetcher(roundTripFunc(func(req *http.Request) (*http.Response, error) {
finalRequest := req.Clone(req.Context())