private Stream CompressToZip(ItemNameValueCollection entriesPathId)
{
var stream = TempStream.Create();
using (var zip = new Ionic.Zip.ZipOutputStream(stream, true))
{
zip.CompressionLevel = Ionic.Zlib.CompressionLevel.Level3;
zip.AlternateEncodingUsage = Ionic.Zip.ZipOption.AsNecessary;
zip.AlternateEncoding = Encoding.UTF8;
foreach (var path in entriesPathId.AllKeys)
{
var counter = 0;
foreach (var entryId in entriesPathId[path])
{
if (CancellationToken.IsCancellationRequested)
{
zip.Dispose();
stream.Dispose();
CancellationToken.ThrowIfCancellationRequested();
}
var newtitle = path;
File file = null;
var convertToExt = string.Empty;
if (!string.IsNullOrEmpty(entryId))
{
FileDao.InvalidateCache(entryId);
file = FileDao.GetFile(entryId);
if (file == null)
{
Error = FilesCommonResource.ErrorMassage_FileNotFound;
continue;
}
if (file.ContentLength > SetupInfo.AvailableFileSize)
{
Error = string.Format(FilesCommonResource.ErrorMassage_FileSizeZip, FileSizeComment.FilesSizeToString(SetupInfo.AvailableFileSize));
continue;
}
if (files.ContainsKey(file.ID.ToString()))
{
convertToExt = files[file.ID.ToString()];
if (!string.IsNullOrEmpty(convertToExt))
{
newtitle = FileUtility.ReplaceFileExtension(path, convertToExt);
}
}
}
if (0 < counter)
{
var suffix = " (" + counter + ")";
if (!string.IsNullOrEmpty(entryId))
{
newtitle = 0 < newtitle.IndexOf('.') ? newtitle.Insert(newtitle.LastIndexOf('.'), suffix) : newtitle + suffix;
}
else
{
break;
}
}
zip.PutNextEntry(newtitle);
if (!string.IsNullOrEmpty(entryId) && file != null)
{
try
{
if (FileConverter.EnableConvert(file, convertToExt))
{
//Take from converter
using (var readStream = FileConverter.Exec(file, convertToExt))
{
readStream.StreamCopyTo(zip);
if (!string.IsNullOrEmpty(convertToExt))
{
FilesMessageService.Send(file, headers, MessageAction.FileDownloadedAs, file.Title, convertToExt);
}
else
{
FilesMessageService.Send(file, headers, MessageAction.FileDownloaded, file.Title);
}
}
}
else
{
using (var readStream = FileDao.GetFileStream(file))
{
readStream.StreamCopyTo(zip);
FilesMessageService.Send(file, headers, MessageAction.FileDownloaded, file.Title);
}
}
}
catch (Exception ex)
{
Error = ex.Message;
Logger.Error(Error, ex);
}
}
counter++;
}
ProgressStep();
}
}
return(stream);
}
