[Bug] Link post with non-accessible image results in 500 error

[Codycody31]

Initial post reporting this: https://discuit.net/DiscuitMeta/post/_FbRPTSe
Site link: https://www.mobilephonemuseum.com/
Image link: https://mpm-next.code8.link/logo.png (this image returns a 503 from apache, not an image)
Message on server when attempting to use URL: 500 Internal server error: Unsupported image format

Seems the image the site uses for its ogImage is not a format discuit supports. Or more like the image it is trying to use doesn't exist

discuit/core/post.go

Lines 688 to 730 in f6fc5b6

	func getLinkPostImage(u *url.URL) []byte {
	fullURL := u.String()
	res, err := httputil.Get(fullURL)
	if err != nil {
	return nil
	}
	defer res.Body.Close()
	imageURL, err := httputil.ExtractOpenGraphImage(res.Body)
	if err != nil {
	// TODO: Log this error.
	}
	if imageURL == "" {
	// Since og:image not found, see if the link itself is an image.
	probablyAnImage := slices.Contains([]string{"image/jpeg", "image/png", "image/webp"}, res.Header.Get("Content-Type"))
	if !probablyAnImage {
	exts := []string{".jpg", ".jpeg", ".png", ".webp"}
	for _, v := range exts {
	if strings.HasSuffix(u.Path, v) {
	probablyAnImage = true
	break
	}
	}
	}
	if probablyAnImage {
	imageURL = fullURL
	}
	}
	if imageURL != "" {
	res, err := httputil.Get(imageURL)
	if err != nil {
	return nil
	}
	defer res.Body.Close()
	image, err := io.ReadAll(res.Body)
	if err != nil {
	return nil
	}
	return image
	}
	return nil
	}

[previnder]

Fixed in dffb310.