/// <summary>
/// restituisce il formato corretto del RecordFile per la spediziona sul socket
///[Nome completo file]\r\n[Dimensione file (12 char)][Hash del file (32 char)][Timestamp (16 char)]\r\n
/// </summary>
/// <returns></returns>
public string toSendFormat()
{
return(this.nameAndPath + "\r\n" +
size.ToString("X12") +
hash +
MyConverter.DateTimeToUnixTimestamp(lastModified).ToString("X16") + "\r\n");
}
/// <summary>
/// </summary>
/// <param name="line">formato: // Invio: [Percorso completo]\r\n[Ultima modifica (16 char)][Hash (32 char)]\r\n </param>
public void addRawRecord(string line, int backupVersion)
{
//separo campi di line
string[] stringSeparators = new string[] { "\r\n" };
string[] part = line.Split(stringSeparators, StringSplitOptions.None);
//estraggo lastModify string
long lmLong = Convert.ToInt64(part[1].Substring(0, 16), 16);
string hashStr = part[1].Substring(16, 32);
addRecoverRecord(
new RecordFile(part[0], hashStr, -1, MyConverter.UnixTimestampToDateTime(lmLong)),
backupVersion);
}
/// <summary>
/// return true se ricezione corretta, false altrimenti
/// </summary>
/// <param name="fout">already opened output fileStream</param>
/// <returns>last modify date of the file</returns>
private System.DateTime RecFileContent(string FileNameAndPath, FileStream fout)
{
//ricezione hash
byte[] hashReceived = new byte[32];
var count = serverStream.Read(hashReceived, 0, 32);
string strHash = System.Text.Encoding.UTF8.GetString(hashReceived);
//remove \r\n
socketReadline();
//legge dimensione del file
long sizeFile = Convert.ToInt64(socketReadline(), 16);
//legge data_ultima_modifica file
var lmfile = MyConverter.UnixTimestampToDateTime(Convert.ToInt64(socketReadline(), 16));
//data_rec
sendToServer(commDataRec);
int attempt = 0;
do
{
//ricezione e salvataggio su disco.
var buffer = new byte[1024];
int bytesRead;
long totalBytesRead = 0;
fout.Seek(0, SeekOrigin.Begin);
//step della progress bar
long stepSize = (long)Math.Ceiling((double)sizeFile / 10);
long nextStep = 0;
do
{
bytesRead = serverStream.Read(buffer, 0, buffer.Length);
fout.Write(buffer, 0, bytesRead);
totalBytesRead += bytesRead;
//aggiorna progress bar
if (totalBytesRead > nextStep)
{
mainWindow.recoverW.Dispatcher.BeginInvoke(mainWindow.recoverW.DelSetRecProgressValues, sizeFile, 0, totalBytesRead);
nextStep += stepSize;
}
}while (totalBytesRead < sizeFile);
mainWindow.recoverW.Dispatcher.BeginInvoke(mainWindow.recoverW.DelSetRecProgressValues, sizeFile, 0, sizeFile);
if (totalBytesRead != sizeFile)
{
sendToServer(commSndAgain);
attempt++;
if (attempt < 5)
{
continue;
}
else
{
break;
}
}
//calcolo e confronto hash
var computedHash = RecordFile.calcHash(FileNameAndPath, fout);
if (computedHash == strHash)
{
sendToServer(commDataAck);
return(lmfile);
}
else
{
sendToServer(commSndAgain);
attempt++;
}
}while (attempt < 5);
MyLogger.print("errore nel download del file. impossibile effettuare il ripristino.\n");
//todo: catchare questa eccezione nelle funzioni chiamanti
throw new CancelFileRequestException();
}
