public static async Task <byte[]> GetFeaturedImage(string url)
{
byte[] output;
try
{
// download the page contents as a string
var request = HttpWebRequest.CreateHttp(url);
request.Accept = "text/html";
var result = await request.GetResponseAsync();
using (var reader = new StreamReader(result.GetResponseStream()))
{
string pageContents = reader.ReadToEnd();
MatchCollection matches = Regex.Matches(pageContents, @"<img ([^>]+)>");
// build a list of all img tags
IList <ImageTag> imageTags = new List <ImageTag>();
for (int i = 0; i < matches.Count && i < AppSettings.MaxImagesToLoad; i++)
{
imageTags.Add(await ImageTag.GetFromUrl(matches[i].Value, url));
}
var featured = imageTags.OrderByDescending(t => t.Width * t.Height).First();
output = featured.ImageBytes;
}
}
catch
{
string fileName = Path.Combine(_webRootPath, AppSettings.DefaultPreviewImage);
output = File.ReadAllBytes(fileName);
}
return(output);
}