Function resolveSubscriptionIcon

app.go:1845–1864

(client *http.Client, subURL string, h http.Header)

}

func resolveSubscriptionIcon(client *http.Client, subURL string, h http.Header) string {
	cands := subscriptionIconCandidates(subURL, h)
	for _, cand := range cands {
		if data := inlineSmallImageFromURL(client, cand, subURL); data != "" {
			return data
		}
	}
	if len(cands) > 0 {
		return cands[0]
	}
	if fromPage := discoverIconFromSubscriptionPage(client, subURL); fromPage != "" {
		return fromPage
	}
	for _, cand := range originIconFallbackURLs(subURL) {
		if data := inlineSmallImageFromURL(client, cand, subURL); data != "" {
			return data
		}
	}
	return ""
}

func originIconFallbackURLs(subURL string) []string {
	parsed, err := url.Parse(subURL)