private string BuildZipArguments(BackupJob backupJob, string listFile)
{
const string archiveType = "7z";
var arguments = new StringBuilder(100);
arguments.Append(backupJob.IsFullBackup ? "a" : "u");
arguments.AppendFormat(" \"{0}\"", backupJob.FullBackupFile.FullName);
arguments.AppendFormat(" -t{0}", archiveType);
arguments.AppendFormat(" -mx={0}", backupSettings.CompressionLevel);
arguments.AppendFormat(" -mhe={0}", backupSettings.EncryptHeaders ? "on" : "off");
//Is the archive encrypted?
var archivePassword = SecurityHelpers.DecodeSecret(backupSettings.ArchivePassword);
if (!string.IsNullOrEmpty(archivePassword))
{
arguments.AppendFormat(" -p{0}", archivePassword);
}
if (!backupJob.IsFullBackup)
{
arguments.Append(" -ms=off");
arguments.Append(" -u- -up0q3r2x2y2z0w2");
arguments.AppendFormat("!\"{0}\"", backupJob.IncrementalFile.FullName);
}
arguments.AppendFormat(" @{0}", listFile);
return(arguments.ToString());
}
private void DetermineBackupMode(BackupJob backupJob, bool forceFull)
{
if (forceFull)
{
log.Info("Performing FULL backup (requested).");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
return;
}
//Set the 7z container files for the Full/Inc. Figure out which backup to perform.
var matchingFiles = Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("F-{0}*.7z", backupJob.BackupName));
//No full backups
if (matchingFiles.Length != 1)
{
log.Info("No full backup file found. Performing FULL backup.");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
return;
}
//There is one full backup, figure if it needs to be redone
backupJob.FullBackupFile = new FileInfo(matchingFiles[0]);
var fullBackupAgeDays = (DateTime.UtcNow - backupJob.FullBackupFile.CreationTimeUtc).TotalDays;
if (fullBackupAgeDays > backupJob.MaxFullBackupAgeDays)
{
log.Info("Full backup is {0} days old. Performing FULL backup.", fullBackupAgeDays.ToString("0.00"));
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
}
else
{
//Test the full backup file to make sure it isn't corrupt
bool isFullBackupOK = TestFullBackupFile(backupJob);
if (isFullBackupOK)
{
log.Info("Full backup is {0} days old and passed validity check. Performing INCREMENTAL backup.", fullBackupAgeDays.ToString("0.00"));
backupJob.IncrementalFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder,
string.Format("I-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
}
else
{
log.Info("Full backup failed validity check. Performing FULL backup.");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
}
}
}
private void RemoveOldLocalIncrementalBackups(BackupJob backupJob, int numKeep)
{
var existingFiles = new List <string>(Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("I-{0}-*.7z", backupJob.BackupName)));
var filesToDelete = existingFiles.OrderByDescending(f => f.ToLower()).Skip(numKeep);
log.Info("Found: {0} existing local incremental files. Will keep: {1}", existingFiles.Count, numKeep);
foreach (string fileToDelete in filesToDelete)
{
log.Info("Deleting local: {0}", fileToDelete);
File.Delete(fileToDelete);
}
}
private void CleanupLocalBackups(BackupJob backupJob)
{
if (backupJob.IsFullBackup)
{
foreach (var fullBak in Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("F-{0}*.7z", backupJob.BackupName)))
{
File.Delete(fullBak);
}
RemoveOldLocalIncrementalBackups(backupJob, 0);
}
else
{
//Only keep 1 less than specified in config - the backup that is about to run is that extra
RemoveOldLocalIncrementalBackups(backupJob, Math.Max(backupJob.NumberIncremental - 1, 0));
}
}
private void BuildArchive(BackupJob backupJob)
{
var r = new Random();
string listFile = "l" +r.Next(0, 100000)+ ".tmp";
File.WriteAllLines(listFile, backupJob.BackupLocations);
Run7Zip(backupJob, listFile);
File.Delete(listFile);
if (backupJob.IsFullBackup) {
backupJob.FullBackupFile.Refresh();
log.Info("Full archive file created. Size: {0}", StaticHelpers.FormatFileSize(backupJob.FullBackupFile.Length));
}
else {
backupJob.IncrementalFile.Refresh();
log.Info("Incremental archive file created. Size: {0}", StaticHelpers.FormatFileSize(backupJob.IncrementalFile.Length));
}
}
private void Run7Zip(BackupJob backupJob, string listFile)
{
var p = new ProcessStartInfo {
FileName = backupSettings.SevenZipExecutablePath,
UseShellExecute = false,
Arguments = BuildZipArguments(backupJob, listFile),
RedirectStandardOutput = true
};
var x = Process.Start(p);
string output = x.StandardOutput.ReadToEnd();
x.WaitForExit(1000 * 60 * 30);
log.Debug(output);
if (x.ExitCode != 0)
{
throw new ApplicationException("Archive failed. Exit Code: " + x.ExitCode);
}
}
private void BuildArchive(BackupJob backupJob)
{
var r = new Random();
string listFile = "l" + r.Next(0, 100000) + ".tmp";
File.WriteAllLines(listFile, backupJob.BackupLocations);
Run7Zip(backupJob, listFile);
File.Delete(listFile);
if (backupJob.IsFullBackup)
{
backupJob.FullBackupFile.Refresh();
log.Info("Full archive file created. Size: {0}", StaticHelpers.FormatFileSize(backupJob.FullBackupFile.Length));
}
else
{
backupJob.IncrementalFile.Refresh();
log.Info("Incremental archive file created. Size: {0}", StaticHelpers.FormatFileSize(backupJob.IncrementalFile.Length));
}
}
private bool TestFullBackupFile(BackupJob backupJob)
{
string args = "t \"" + backupJob.FullBackupFile.FullName + "\"";
var archivePassword = SecurityHelpers.DecodeSecret(backupSettings.ArchivePassword);
if (!string.IsNullOrEmpty(archivePassword))
{
args += " -p" + archivePassword;
}
var p = new ProcessStartInfo {
FileName = backupSettings.SevenZipExecutablePath,
UseShellExecute = false,
Arguments = args,
RedirectStandardOutput = true
};
var x = Process.Start(p);
string output = x.StandardOutput.ReadToEnd();
x.WaitForExit(1000 * 60 * 30);
log.Debug(output);
return(x.ExitCode == 0);
}
private string BuildZipArguments(BackupJob backupJob, string listFile)
{
const string archiveType = "7z";
var arguments = new StringBuilder(100);
arguments.Append(backupJob.IsFullBackup ? "a" : "u");
arguments.AppendFormat(" \"{0}\"", backupJob.FullBackupFile.FullName);
arguments.AppendFormat(" -t{0}", archiveType);
arguments.AppendFormat(" -mx={0}", backupSettings.CompressionLevel);
arguments.AppendFormat(" -mhe={0}", backupSettings.EncryptHeaders ? "on" : "off");
//Is the archive encrypted?
var archivePassword = SecurityHelpers.DecodeSecret(backupSettings.ArchivePassword);
if (!string.IsNullOrEmpty(archivePassword))
arguments.AppendFormat(" -p{0}", archivePassword);
if (!backupJob.IsFullBackup) {
arguments.Append(" -ms=off");
arguments.Append(" -u- -up0q3r2x2y2z0w2");
arguments.AppendFormat("!\"{0}\"", backupJob.IncrementalFile.FullName);
}
arguments.AppendFormat(" @{0}", listFile);
return arguments.ToString();
}
private bool TestFullBackupFile(BackupJob backupJob)
{
string args = "t \"" + backupJob.FullBackupFile.FullName + "\"";
var archivePassword = SecurityHelpers.DecodeSecret(backupSettings.ArchivePassword);
if (!string.IsNullOrEmpty(archivePassword))
args += " -p" + archivePassword;
var p = new ProcessStartInfo {
FileName = backupSettings.SevenZipExecutablePath,
UseShellExecute = false,
Arguments = args,
RedirectStandardOutput = true
};
var x = Process.Start(p);
string output = x.StandardOutput.ReadToEnd();
x.WaitForExit(1000*60*30);
log.Debug(output);
return x.ExitCode == 0;
}
private void Run7Zip(BackupJob backupJob, string listFile)
{
var p = new ProcessStartInfo {
FileName = backupSettings.SevenZipExecutablePath,
UseShellExecute = false,
Arguments = BuildZipArguments(backupJob, listFile),
RedirectStandardOutput = true
};
var x = Process.Start(p);
string output = x.StandardOutput.ReadToEnd();
x.WaitForExit(1000 * 60 * 30);
log.Debug(output);
if (x.ExitCode != 0)
throw new ApplicationException("Archive failed. Exit Code: " + x.ExitCode);
}
private void RemoveOldLocalIncrementalBackups(BackupJob backupJob, int numKeep)
{
var existingFiles = new List<string>(Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("I-{0}-*.7z", backupJob.BackupName)));
var filesToDelete = existingFiles.OrderByDescending(f => f.ToLower()).Skip(numKeep);
log.Info("Found: {0} existing local incremental files. Will keep: {1}", existingFiles.Count, numKeep);
foreach (string fileToDelete in filesToDelete) {
log.Info("Deleting local: {0}", fileToDelete);
File.Delete(fileToDelete);
}
}
private void DetermineBackupMode(BackupJob backupJob, bool forceFull)
{
if (forceFull) {
log.Info("Performing FULL backup (requested).");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
return;
}
//Set the 7z container files for the Full/Inc. Figure out which backup to perform.
var matchingFiles = Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("F-{0}*.7z", backupJob.BackupName));
//No full backups
if (matchingFiles.Length != 1) {
log.Info("No full backup file found. Performing FULL backup.");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
return;
}
//There is one full backup, figure if it needs to be redone
backupJob.FullBackupFile = new FileInfo(matchingFiles[0]);
var fullBackupAgeDays = (DateTime.UtcNow - backupJob.FullBackupFile.CreationTimeUtc).TotalDays;
if (fullBackupAgeDays > backupJob.MaxFullBackupAgeDays) {
log.Info("Full backup is {0} days old. Performing FULL backup.", fullBackupAgeDays.ToString("0.00"));
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
}
else {
//Test the full backup file to make sure it isn't corrupt
bool isFullBackupOK = TestFullBackupFile(backupJob);
if (isFullBackupOK) {
log.Info("Full backup is {0} days old and passed validity check. Performing INCREMENTAL backup.", fullBackupAgeDays.ToString("0.00"));
backupJob.IncrementalFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder,
string.Format("I-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
}else {
log.Info("Full backup failed validity check. Performing FULL backup.");
backupJob.FullBackupFile =
new FileInfo(Path.Combine(backupSettings.LocalBackupFolder, string.Format("F-{0}-{1}.7z", backupJob.BackupName, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"))));
backupJob.IncrementalFile = null;
}
}
}
private void CleanupLocalBackups(BackupJob backupJob)
{
if (backupJob.IsFullBackup) {
foreach (var fullBak in Directory.GetFiles(backupSettings.LocalBackupFolder, string.Format("F-{0}*.7z", backupJob.BackupName)))
File.Delete(fullBak);
RemoveOldLocalIncrementalBackups(backupJob, 0);
}
else {
//Only keep 1 less than specified in config - the backup that is about to run is that extra
RemoveOldLocalIncrementalBackups(backupJob, Math.Max(backupJob.NumberIncremental - 1, 0));
}
}
