/// <summary>
/// Extracts all the embedded object from the OpenDocument <paramref name="inputFile"/> to the
/// <see cref="outputFolder"/> and returns the files with full path as a list of strings
/// </summary>
/// <param name="inputFile">The OpenDocument format file</param>
/// <param name="outputFolder">The output folder</param>
/// <returns>List with files or en empty list when there are nog embedded files</returns>
/// <exception cref="OEFileIsPasswordProtected">Raised when the OpenDocument format file is password protected</exception>
internal List <string> ExtractFromOpenDocumentFormat(string inputFile, string outputFolder)
{
var result = new List <string>();
var zipFile = new ZipFile(inputFile);
// Check if the file is password protected
var manifestEntry = zipFile.FindEntry("META-INF/manifest.xml", true);
if (manifestEntry != -1)
{
using (var manifestEntryStream = zipFile.GetInputStream(manifestEntry))
using (var manifestEntryMemoryStream = new MemoryStream())
{
manifestEntryStream.CopyTo(manifestEntryMemoryStream);
manifestEntryMemoryStream.Position = 0;
using (var streamReader = new StreamReader(manifestEntryMemoryStream))
{
var manifest = streamReader.ReadToEnd();
if (manifest.ToUpperInvariant().Contains("ENCRYPTION-DATA"))
{
throw new OEFileIsPasswordProtected("The file '" + Path.GetFileName(inputFile) +
"' is password protected");
}
}
}
}
foreach (ZipEntry zipEntry in zipFile)
{
if (!zipEntry.IsFile)
{
continue;
}
if (zipEntry.IsCrypted)
{
throw new OEFileIsPasswordProtected("The file '" + Path.GetFileName(inputFile) +
"' is password protected");
}
var name = zipEntry.Name.ToUpperInvariant();
if (!name.StartsWith("OBJECT") || name.Contains("/"))
{
continue;
}
string fileName = null;
var objectReplacementFileIndex = zipFile.FindEntry("ObjectReplacements/" + name, true);
if (objectReplacementFileIndex != -1)
{
fileName = Extraction.GetFileNameFromObjectReplacementFile(zipFile, objectReplacementFileIndex);
}
using (var zipEntryStream = zipFile.GetInputStream(zipEntry))
using (var zipEntryMemoryStream = new MemoryStream())
{
zipEntryStream.CopyTo(zipEntryMemoryStream);
using (var compoundFile = new CompoundFile(zipEntryMemoryStream))
result.Add(Extraction.SaveFromStorageNode(compoundFile.RootStorage, outputFolder, fileName));
}
}
return(result);
}
/// <summary>
/// Extracts all the embedded object from the OpenDocument <paramref name="inputFile"/> to the
/// <see cref="outputFolder"/> and returns the files with full path as a list of strings
/// </summary>
/// <param name="inputFile">The OpenDocument format file</param>
/// <param name="outputFolder">The output folder</param>
/// <returns>List with files or en empty list when there are nog embedded files</returns>
/// <exception cref="OEFileIsPasswordProtected">Raised when the OpenDocument format file is password protected</exception>
internal List <string> ExtractFromOpenDocumentFormat(string inputFile, string outputFolder)
{
Logger.WriteToLog("The file is of type 'Open document format'");
var result = new List <string>();
var zipFile = SharpCompress.Archives.Zip.ZipArchive.Open(inputFile);
// Check if the file is password protected
var manifestEntry = FindEntryByName(zipFile, "META-INF/manifest.xml");
if (manifestEntry != null)
{
using (var manifestEntryStream = manifestEntry.OpenEntryStream())
using (var manifestEntryMemoryStream = new MemoryStream())
{
manifestEntryStream.CopyTo(manifestEntryMemoryStream);
manifestEntryMemoryStream.Position = 0;
using (var streamReader = new StreamReader(manifestEntryMemoryStream))
{
var manifest = streamReader.ReadToEnd();
if (manifest.ToUpperInvariant().Contains("ENCRYPTION-DATA"))
{
throw new OEFileIsPasswordProtected("The file '" + Path.GetFileName(inputFile) +
"' is password protected");
}
}
}
}
foreach (var zipEntry in zipFile.Entries)
{
if (zipEntry.IsDirectory)
{
continue;
}
if (zipEntry.IsEncrypted)
{
throw new OEFileIsPasswordProtected("The file '" + Path.GetFileName(inputFile) +
"' is password protected");
}
var name = zipEntry.Key.ToUpperInvariant();
if (!name.StartsWith("OBJECT") || name.Contains("/"))
{
continue;
}
string fileName = null;
var objectReplacementFile = FindEntryByName(zipFile, "ObjectReplacements/" + name);
if (objectReplacementFile != null)
{
fileName = Extraction.GetFileNameFromObjectReplacementFile(objectReplacementFile);
}
Logger.WriteToLog($"Extracting embedded object '{fileName}'");
using (var zipEntryStream = zipEntry.OpenEntryStream())
using (var zipEntryMemoryStream = new MemoryStream())
{
zipEntryStream.CopyTo(zipEntryMemoryStream);
using (var compoundFile = new CompoundFile(zipEntryMemoryStream))
result.Add(Extraction.SaveFromStorageNode(compoundFile.RootStorage, outputFolder, fileName));
}
}
return(result);
}
