public ContentInfo GetParent()
{
byte[] buf = null;
switch (Document.Extension)
{
case PathUtil.EXTENSIONP7M:
var p7k = P7kLoadFromBuf();
if (p7k.Equals(0))
{
return(null);
}
buf = P7kContentReadToBuf(p7k);
P7kFree(p7k);
break;
case PathUtil.EXTENSIONPDF:
return(null);
default:
var p7x = P7xLoadFromBuf();
if (p7x.Equals(0))
{
return(null);
}
buf = P7xContentReadToBuf(p7x);
P7xFree(p7x);
break;
}
if (buf.IsNullOrEmpty())
{
return(null);
}
string resolved = Document.FileName.ToPath().GetFileNameResolveChain();
if (this.Document.Extension.EqualsIgnoreCase(PathUtil.EXTENSIONP7M))
{
var contentType = new DigitalSignViewer().GetContentTypeBuf(buf, this.Document.FileName);
if (contentType.EqualsIgnoreCase(PathUtil.EXTENSIONP7M))
{
resolved = resolved + contentType;
return(new ContentInfo(resolved, buf));
}
}
if (!resolved.ToPath().HasExtension())
{
var contentType = new DigitalSignViewer().GetContentTypeBuf(buf, this.Document.FileName);
resolved = resolved.ToPath().ChangeExtension(contentType);
}
return(new ContentInfo(resolved, buf));
}
public static string GetContentTypeBuf(this DigitalSignViewer source, byte[] buf)
{
enumContentTypeEx docType;
string pDocExt = null;
source.GetContentTypeBuf(buf, out docType, out pDocExt);
if (pDocExt.IsNullOrWhiteSpace())
{
throw new InvalidOperationException("Non è stato possibile identificare il contenuto.");
}
return(pDocExt);
}
/// <summary>
/// Recupera la corretta estensione del file dall'array di byte.
/// Se non si riesce a identificare l'estensione corretta, prima rimuovo le estensioni ".P7M" e in seguito vado a verificare il nome del file.
/// </summary>
/// <param name="source"></param>
/// <param name="buf">buffer di dati</param>
/// <param name="filename">nome del file</param>
/// <returns></returns>
public static string GetContentTypeBuf(this DigitalSignViewer source, byte[] buf, string filename)
{
try
{
return(GetContentTypeBuf(source, buf));
}
catch (Exception)
{
try
{
return(ExtensionFileByMagicNumbers.GetExtension(buf).ToString());
}
catch (Exception)
{
return(ExtensionFile.none.ToString());
}
}
}
public static string GetContentTypeBuf(this DigitalSignViewer source, IContent contentInfo)
{
return(source.GetContentTypeBuf(contentInfo.Content));
}
