Use the code below to add hander images with svg extension
FonetDriver fonetDriver = FonetDriver.Make();
fonetDriver.ImageHandler = SvgImageHandler;
Add SvgImageHandler Hander
private static byte[] SvgImageHandler(string svgContent)
{
if (svgContent.Contains("http://www.w3.org/2000/svg"))
{
var svgByteAry = Encoding.UTF8.GetBytes(svgContent);
using (var stream = new MemoryStream(svgByteAry))
{
var svgDocument = SvgDocument.Open<SvgDocument>(stream);
using (var memoryStream = new MemoryStream())
{
svgDocument.Draw()
.Save(memoryStream, ImageFormat.Png);
var byteArray = memoryStream.ToArray();
return byteArray;
}
}
}
if (!Uri.IsWellFormedUriString(svgContent, UriKind.RelativeOrAbsolute))
return null;
if (!ValidateUrlImage(svgContent))
{
ICacheService cacheService = new HttpCache();
return cacheService.Get(Constants.NoImage,
() =>
{
var baseDirectory = AppDomain.CurrentDomain.BaseDirectory + ConfigurationManager.AppSettings[Constants.ImagePath];
var defaultUrl = Path.Combine(baseDirectory, Constants.NoImageFile);
var img = Image.FromFile(defaultUrl);
var imgCon = new ImageConverter();
return (byte[])imgCon.ConvertTo(img, typeof(byte[]));
});
}
return null;
}
Return the correct image if the URL is valid or passed false so that the image does not display. keeping the code more reliable.
private static bool ValidateUrlImage(string absoluteUrl)
{
Uri uri;
if (!Uri.TryCreate(absoluteUrl, UriKind.Absolute, out uri))
{
return true;
}
using (var client = new WebClient())
{
try
{
using (var stream = client.OpenRead(uri))
{
Image.FromStream(stream);
return true;
}
}
catch (Exception)
{
return false;
}
}
}