protected void RenderGravater(HtmlTextWriter output)
{
// output the default attributes:
AddAttributesToRender(output);
//if (UseLink)
//{
// LinkUrl = GetLinkUrl();
//}
// if the size property has been specified, ensure it is a short, and in the range
// 1..512:
try
{
// if it's not in the allowed range, throw an exception:
if (Size < 1 || Size > 512)
{
throw new ArgumentOutOfRangeException();
}
}
catch
{
Size = 80;
}
// default the image url:
string imageUrl = GravatarBaseUrl;
if (!string.IsNullOrEmpty(Email))
{
// build up image url, including MD5 hash for supplied email:
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
UTF8Encoding encoder = new UTF8Encoding();
MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
byte[] hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(Email));
StringBuilder sb = new StringBuilder(hashedBytes.Length * 2);
for (int i = 0; i < hashedBytes.Length; i++)
{
sb.Append(hashedBytes[i].ToString("X2"));
}
imageUrl += sb.ToString().ToLower();
imageUrl += ".jpg?r=" + MaxAllowedRating.ToString();
imageUrl += "&s=" + Size.ToString();
}
// output default parameter if specified
if ((UseInternalDefaultForGravatar) && (DefaultInternalAvatar.Length > 0))
{
string defaultImageUrl = WebUtils.ResolveServerUrl(DefaultInternalAvatar);
if (!defaultImageUrl.Contains("localhost"))
{
imageUrl += "&default=" + HttpUtility.UrlEncode(defaultImageUrl);
}
}
// if we need to output the site link:
if (OutputGravatarSiteLink)
{
output.AddAttribute(HtmlTextWriterAttribute.Href, GetLinkUrl());
output.AddAttribute(HtmlTextWriterAttribute.Title, LinkTitle);
if (CssClass.Length > 0)
{
output.AddAttribute(HtmlTextWriterAttribute.Class, CssClass);
}
if (Target.Length > 0)
{
output.AddAttribute(HtmlTextWriterAttribute.Target, Target);
}
output.RenderBeginTag(HtmlTextWriterTag.A);
}
// output required attributes/img tag:
output.AddAttribute(HtmlTextWriterAttribute.Width, Size.ToString());
output.AddAttribute(HtmlTextWriterAttribute.Height, Size.ToString());
output.AddAttribute(HtmlTextWriterAttribute.Src, imageUrl);
output.AddAttribute(HtmlTextWriterAttribute.Alt, "Gravatar");
output.RenderBeginTag("img");
output.RenderEndTag();
// if we need to output the site link:
if (OutputGravatarSiteLink)
{
output.RenderEndTag();
}
}
protected override void Render(HtmlTextWriter output)
{
if (HttpContext.Current == null)
{
output.Write("[" + this.ID + "]");
return;
}
// output the default attributes:
AddAttributesToRender(output);
// if the size property has been specified, ensure it is a short, and in the range
// 1..512:
try
{
// if it's not in the allowed range, throw an exception:
if (Size < 1 || Size > 512)
{
throw new ArgumentOutOfRangeException();
}
}
catch
{
Size = 80;
}
// default the image url:
//string imageUrl = "http://www.gravatar.com/avatar.php?";
// changes by Joe Audette 2008-08-13
string imageUrl = GravatarBaseUrl;
if (!string.IsNullOrEmpty(Email))
{
// build up image url, including MD5 hash for supplied email:
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
UTF8Encoding encoder = new UTF8Encoding();
MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
byte[] hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(Email));
StringBuilder sb = new StringBuilder(hashedBytes.Length * 2);
for (int i = 0; i < hashedBytes.Length; i++)
{
sb.Append(hashedBytes[i].ToString("X2"));
}
// output parameters:
//imageUrl += "gravatar_id=" + sb.ToString().ToLower();
//imageUrl += "&rating=" + MaxAllowedRating.ToString();
//imageUrl += "&size=" + Size.ToString();
// changes by Joe Audette 2008-08-13
imageUrl += sb.ToString().ToLower();
imageUrl += ".jpg?r=" + MaxAllowedRating.ToString();
imageUrl += "&s=" + Size.ToString();
}
// output default parameter if specified
if (!string.IsNullOrEmpty(DefaultImage))
{
imageUrl += "&default=" + HttpUtility.UrlEncode(DefaultImage);
}
// if we need to output the site link:
if (OutputGravatarSiteLink)
{
output.AddAttribute(HtmlTextWriterAttribute.Href, LinkUrl);
output.AddAttribute(HtmlTextWriterAttribute.Title, LinkTitle);
if (CssClass.Length > 0)
{
output.AddAttribute(HtmlTextWriterAttribute.Class, CssClass);
}
if (target.Length > 0)
{
output.AddAttribute(HtmlTextWriterAttribute.Target, target);
}
output.RenderBeginTag(HtmlTextWriterTag.A);
}
// output required attributes/img tag:
output.AddAttribute(HtmlTextWriterAttribute.Width, Size.ToString());
output.AddAttribute(HtmlTextWriterAttribute.Height, Size.ToString());
output.AddAttribute(HtmlTextWriterAttribute.Src, imageUrl);
output.AddAttribute(HtmlTextWriterAttribute.Alt, "Gravatar");
output.RenderBeginTag("img");
output.RenderEndTag();
// if we need to output the site link:
if (OutputGravatarSiteLink)
{
output.RenderEndTag();
}
}