public static void GetImageFromGravatar(string imageFileName, string email, int authorImageSize, FallBackService fallBack)
{
try
{
var baseUrl = String.Concat("http://www.gravatar.com/avatar/{0}?d=identicon&s=",
authorImageSize, "&r=g");
if (fallBack == FallBackService.Identicon)
{
baseUrl += "&d=identicon";
}
if (fallBack == FallBackService.MonsterId)
{
baseUrl += "&d=monsterid";
}
if (fallBack == FallBackService.Wavatar)
{
baseUrl += "&d=wavatar";
}
//hash the email address
var emailHash = MD5.CalcMD5(email.ToLower());
//format our url to the Gravatar
var imageUrl = String.Format(baseUrl, emailHash);
var webClient = new WebClient {
Proxy = WebRequest.DefaultWebProxy
};
webClient.Proxy.Credentials = CredentialCache.DefaultCredentials;
var imageStream = webClient.OpenRead(imageUrl);
cache.CacheImage(imageFileName, imageStream);
}
catch (Exception ex)
{
//catch IO errors
Trace.WriteLine(ex.Message);
}
}
/// <summary>
/// Generates an email hash as per the Gravatar specifications.
/// </summary>
/// <param name="email">The email to hash.</param>
/// <returns>The hash of the email.</returns>
/// <remarks>
/// The process of creating the hash are specified at http://en.gravatar.com/site/implement/hash/
/// </remarks>
private static string HashEmail(string email)
{
return(MD5.CalcMD5(email.Trim().ToLowerInvariant()));
}