private string ExtractFavIconUrl(Uri url)
{
WebClient client = new WebClientExtended(_timeout);
string iconUrl = null;
string html = client.DownloadString(url);
Match match;
// Link
foreach (Match m in Regex.Matches(html, "<link[^>]*(rel=\"icon\"|rel=\"shortcut icon\")[^>]*[\\/]?>", RegexOptions.IgnoreCase)) /*|rel=\"apple-touch-icon\"|rel=\"apple-touch-icon-precomposed\"*/
{
match = Regex.Match(m.Value, "href=\"([^\"]*)\"", RegexOptions.IgnoreCase);
if (match.Success)
{
return(match.Groups[1].Value);
}
}
// Meta
foreach (Match m in Regex.Matches(html, "<meta[^>]*(itemprop=\"image\")[^>]*[\\/]?>", RegexOptions.IgnoreCase))
{
match = Regex.Match(m.Value, "content=\"([^\"]*)\"", RegexOptions.IgnoreCase);
if (match.Success)
{
return(match.Groups[1].Value);
}
}
return(iconUrl);
}
private Image DownloadFavicon(Uri baseUrl, string iconUrl)
{
Image icon = null;
WebClient client = new WebClientExtended(_timeout);
try
{
// Download fav icon
if (!string.IsNullOrEmpty(iconUrl))
{
Uri faviconUrl;
if (Uri.TryCreate(iconUrl, UriKind.RelativeOrAbsolute, out faviconUrl))
{
if (!faviconUrl.IsAbsoluteUri)
{
faviconUrl = new Uri(baseUrl, iconUrl);
}
System.Net.ServicePointManager.ServerCertificateValidationCallback += (send, certificate, chain, sslPolicyErrors) => { return(true); };
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
Stream dataStream = client.OpenRead(faviconUrl);
icon = Image.FromStream(dataStream);
}
}
}
catch (WebException ex)
{
if (ex.Status != WebExceptionStatus.ProtocolError)
{
throw;
}
}
catch (Exception ex) {
return(null);
}
return(icon);
}