private static bool ValidateFileExtension(string extension, IBinaryElementConstraints constraints)
{
return(Enum.TryParse(extension, true, out FileFormat format) &&
Enum.IsDefined(typeof(FileFormat), format) &&
format.ToString().Equals(extension, StringComparison.OrdinalIgnoreCase) &&
constraints.SupportedFileFormats.Any(f => f == format));
}
// ReSharper disable once ParameterOnlyUsedForPreconditionCheck.Local
private void VerifyBinaryConstraints(int templateCode, IBinaryElementConstraints binaryElementConstraints)
{
if (binaryElementConstraints.SupportedFileFormats == null)
{
throw new TemplateValidationException(templateCode, TemplateElementValidationError.MissingSupportedFileFormats);
}
if (!binaryElementConstraints.SupportedFileFormats.Any())
{
throw new TemplateValidationException(templateCode, TemplateElementValidationError.EmptySupportedFileFormats);
}
if (binaryElementConstraints.MaxFilenameLength <= 0)
{
throw new TemplateValidationException(templateCode, TemplateElementValidationError.NegativeMaxFilenameLength);
}
if (binaryElementConstraints.MaxSize <= 0)
{
throw new TemplateValidationException(templateCode, TemplateElementValidationError.NegativeMaxSize);
}
if (binaryElementConstraints.MaxSize > _maxBinarySize)
{
throw new TemplateValidationException(templateCode, TemplateElementValidationError.MaxSizeLimitExceeded);
}
}
private static IImageInfo ValidateBitmapImageFormat(int templateCode, IBinaryElementConstraints constraints, FileFormat fileFormat, Stream inputStream)
{
var imageFormats =
constraints.SupportedFileFormats
.Aggregate(
new List <string>(),
(result, next) =>
{
if (ImageFormatToMimeTypeMap.TryGetValue(next, out var imageFormat))
{
result.Add(imageFormat);
}
return(result);
});
inputStream.Position = 0;
var format = Image.DetectFormat(inputStream);
if (format == null)
{
throw new InvalidBinaryException(templateCode, new InvalidImageError());
}
var extension = fileFormat.ToString().ToLowerInvariant();
if (!format.FileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase))
{
// Image format is not consistent with the filename extension
throw new InvalidBinaryException(templateCode, new BinaryExtensionMismatchContentError(extension, format.Name.ToLowerInvariant()));
}
if (!imageFormats.Contains(format.DefaultMimeType, StringComparer.OrdinalIgnoreCase))
{
throw new InvalidBinaryException(templateCode, new BinaryInvalidFormatError(format.Name.ToLowerInvariant()));
}
IImageInfo imageInfo;
try
{
inputStream.Position = 0;
imageInfo = Image.Identify(inputStream);
}
catch (Exception)
{
throw new InvalidBinaryException(templateCode, new InvalidImageError());
}
return(imageInfo);
}
