public static async Task UnzipArchive(Stream inStream, string destinationFolder)
{
ICrossPlatformSpecialFolder specialFolder = DependencyService.Get <ICrossPlatformSpecialFolder>();
string tempFolder = specialFolder.GetTemporaryFolder();
string zipFile = Path.Combine(tempFolder, "temp" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".zip");
try
{
FileStream file = File.Create(zipFile);
try
{
await inStream.CopyToAsync(file);
}
finally
{
file.Dispose();
}
UnzipArchive(zipFile, destinationFolder);
}
finally
{
if (File.Exists(zipFile))
{
File.Delete(zipFile);
}
}
}
public static async Task ZipArchive(Stream outStream, string folderToArchive)
{
ICrossPlatformSpecialFolder specialFolder = DependencyService.Get <ICrossPlatformSpecialFolder>();
string tempFolder = specialFolder.GetTemporaryFolder();
string zipFile = Path.Combine(tempFolder, "temp" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".zip");
try
{
ZipFile.CreateFromDirectory(folderToArchive, zipFile, CompressionLevel.Optimal, false);
var stream = File.OpenRead(zipFile);
try
{
await stream.CopyToAsync(outStream);
}
finally
{
stream.Dispose();
}
}
finally
{
if (File.Exists(zipFile))
{
File.Delete(zipFile);
}
}
}
/// <summary>
/// Esegue il ripristino di un backup.
/// </summary>
/// <param name="backupFilePath">Percorso del file zip di backup</param>
public void RestoreFromFile(string backupFilePath)
{
ICrossPlatformSpecialFolder specialFolder = DependencyService.Get <ICrossPlatformSpecialFolder>();
string tempFolder = specialFolder.GetTemporaryFolder();
string tempExport = Path.Combine(tempFolder, "zip_restore_" + DateTime.Now.ToString("ddMMyyyy_HHmmss"));
Directory.CreateDirectory(tempExport);
try
{
ArchiveUtility.UnzipArchive(backupFilePath, tempExport);
DoRestore(tempExport);
}
finally
{
if (Directory.Exists(tempExport))
{
Directory.Delete(tempExport, true);
}
}
}
/// <summary>
/// Effettua il backup dei file e delle cartelle specificate, in formato ZIP.
/// </summary>
/// <param name="fileStream">Stream del file ZIP con il backup dei file e delle cartelle</param>
/// <returns>Dimensione in byte del file di backup</returns>
public async Task <long> BackupToFile(Stream fileStream)
{
ICrossPlatformSpecialFolder specialFolder = DependencyService.Get <ICrossPlatformSpecialFolder>();
string tempFolder = specialFolder.GetTemporaryFolder();
string tempExport = Path.Combine(tempFolder, DateTime.Now.ToString("ddMMyyyy_HHmmss"));
string tempZIPFolder = Path.Combine(tempExport, "zip");
Directory.CreateDirectory(tempZIPFolder);
try
{
foreach (string filePath in Files.Keys)
{
string newPath = Path.Combine(tempZIPFolder, Path.GetFileName(filePath));
File.Copy(filePath, newPath, true);
}
foreach (string folderPath in Folders.Keys)
{
string newFolder = Path.Combine(tempZIPFolder, Path.GetFileName(folderPath));
Directory.CreateDirectory(newFolder);
string[] files = Directory.GetFiles(folderPath);
foreach (string filePath in files)
{
string newPath = Path.Combine(newFolder, Path.GetFileName(filePath));
File.Copy(filePath, newPath, true);
}
}
await ArchiveUtility.ZipArchive(fileStream, tempZIPFolder);
}
finally
{
if (Directory.Exists(tempExport))
{
Directory.Delete(tempExport, true);
}
}
return(fileStream.Length);
}