// Method for compressing files.
public static void Compress(FileInfo fileToCompress, string baseFolder)
{
try
{
// open the file as a file stream
// that need to be compressed
using (FileStream fileStream = fileToCompress.OpenRead())
{
// if the file is not hidden and has not the
// compression file extension (e.g. ".gz")
// go on and compress the file
if (!File.GetAttributes(fileToCompress.FullName).HasFlag(FileAttributes.Hidden) & !fileToCompress.DirectoryName.Contains(Configuration.TEMP_FOLDER_NAME))
{
// create a temporary directory if it does not exist
DirectoryUtil.CreateDirectory(Path.Combine(baseFolder, Configuration.TEMP_FOLDER_NAME));
// path for the dictionary key
string key = fileToCompress.FullName.Replace(baseFolder, "");
// generate the md5 of the file
string hashValue = CryptographyUtil.Md5(File.ReadAllBytes(fileToCompress.FullName));
// create the sub-directory in the temp folder
// if it does not exist
DirectoryUtil.CreateDirectory(Path.Combine(baseFolder, Configuration.TEMP_FOLDER_NAME + fileToCompress.FullName.Replace(baseFolder, "").Replace(fileToCompress.Name, "")));
// create the file in the location of the base
// folder + temp folder + the file name, again we
// need to replace the base path to append it after the
// temp folder in order to prevent an absolute path at the end
// append the compressed file extension
using (FileStream compressedFileStream = File.Create(Path.Combine(baseFolder, Configuration.TEMP_FOLDER_NAME + fileToCompress.FullName.Replace(baseFolder, "") + Configuration.COMPRESSION_FORMAT)))
{
// compress the file
using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
{
// copy the file of the
// stream to the specified location
fileStream.CopyTo(compressionStream);
LoggingUtil.Info(String.Format("Compressed: {0}", fileToCompress.FullName));
}
// just some not explicit needed information
// reduced size info after the compression ...
FileInfo fileInfo = new FileInfo(Path.Combine(baseFolder, Configuration.TEMP_FOLDER_NAME + fileToCompress.FullName.Replace(baseFolder, "") + Configuration.COMPRESSION_FORMAT));
Console.WriteLine("Compressed {0} from {1} to {2} bytes.", fileToCompress.Name, fileToCompress.Length.ToString(), fileInfo.Length.ToString());
}
// Add to the list each item (file) with the specified values
checksumElements.Add(new FileJsonModel()
{
Name = fileToCompress.Name,
Path = key,
Hash = hashValue,
Date = fileToCompress.CreationTimeUtc.ToUniversalTime().ToString(),
Size = fileToCompress.Length,
Language = null
});
}
}
}
catch (Exception ex)
{
// Log if the file could not be
// compressed due to an exception.
LoggingUtil.Exception(String.Format("Compress Exception: {0}", ex.Message));
}
}