internal WebImage Save(HttpContextBase context, Action <string, byte[]> saveAction, string filePath, string imageFormat, bool forceWellKnownExtension)
{
filePath = filePath ?? FileName;
if (String.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException("filePath", CommonResources.Argument_Cannot_Be_Null_Or_Empty);
}
// GetBytes takes care of executing pending transformations.
// todo: this could be made more efficient by avoiding cloning array
// when format is same
byte[] content = GetBytes(imageFormat);
if (forceWellKnownExtension)
{
ImageFormat saveImageFormat;
ImageFormat requestedImageFormat = String.IsNullOrEmpty(imageFormat) ? _initialFormat : GetImageFormat(imageFormat);
var extension = Path.GetExtension(filePath).TrimStart('.');
// TryFromStringToImageFormat accepts mime types and image names. For images supported by System.Drawing.Imaging, the image name maps to the extension.
// Replace the extension with the current format in the following two events:
// * The extension format cannot be converted to a known format
// * The format does not match.
if (!ConversionUtil.TryFromStringToImageFormat(extension, out saveImageFormat) || !saveImageFormat.Equals(requestedImageFormat))
{
extension = requestedImageFormat.ToString().ToLowerInvariant();
filePath = filePath + "." + extension;
}
}
saveAction(VirtualPathUtil.MapPath(context, filePath), content);
// Update the FileName since it may have changed whilst saving.
FileName = filePath;
return(this);
}
internal static WebImage GetImageFromRequest(HttpRequestBase request, string postedFileName = null)
{
Debug.Assert(request != null);
if ((request.Files == null) || (request.Files.Count == 0))
{
return(null);
}
HttpPostedFileBase file = String.IsNullOrEmpty(postedFileName) ? request.Files[0] : request.Files[postedFileName];
if (file == null || file.ContentLength < 1)
{
return(null);
}
// The content type is specified by the browser and is unreliable.
// Disregard content type, acquire mime type.
ImageFormat format;
string mimeType = MimeMapping.GetMimeMapping(file.FileName);
if (!ConversionUtil.TryFromStringToImageFormat(mimeType, out format))
{
// Unsupported image format.
return(null);
}
WebImage webImage = new WebImage(file.InputStream);
webImage.FileName = file.FileName;
return(webImage);
}
private static ImageFormat GetImageFormat(string format)
{
Debug.Assert(!String.IsNullOrEmpty(format), "format cannot be null");
ImageFormat result;
if (!ConversionUtil.TryFromStringToImageFormat(format, out result))
{
throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, HelpersResources.Image_IncorrectImageFormat, format), "format");
}
return(result);
}
