public bool AppendBlock(byte[] block, int blockNumber)
{
try
{
if (!File.Exists(this.Path) && blockNumber > 0)
{
throw new FileNotFoundException();
}
if (blockNumber == 0)
{
this.MainStream = new MemoryStream();
MainStream.Seek(0, SeekOrigin.Begin);
MainStream.Write(block, 0, block.Length);
return(true);
}
MainStream.Seek(blockNumber * MAX_PACKET_SIZE, SeekOrigin.Begin);
MainStream.Write(block, 0, block.Length);
return(true);
}
catch (UnauthorizedAccessException)
{
this.LastError = "Access denied";
}
catch (IOException)
{
this.LastError = "File not found";
}
return(false);
}
public byte[] ToByteArray()
{
try
{
return(MainStream.ToArray());
}
catch (Exception)
{
}
return(null);
}
public string RecvUntil(string stop)
{
string sb = "";
while (true)
{
sb += Convert.ToChar(MainStream.ReadByte());
if (sb.EndsWith(stop))
{
break;
}
}
return(sb);
}
public string Recv(int length)
{
StringBuilder sb = new StringBuilder();
int i = 0;
while (true)
{
if (i == length)
{
break;
}
sb.Append(Convert.ToChar(MainStream.ReadByte()));
i++;
}
return(sb.ToString());
}
public bool DropFile()
{
try
{
File.WriteAllBytes(this.Path, ToByteArray());
MainStream.Close();
return(true);
}
catch (UnauthorizedAccessException)
{
this.LastError = "Access denied";
}
catch (IOException)
{
this.LastError = "File not found";
}
return(false);
}
public void Send(string str)
{
byte[] buf = Encoding.UTF8.GetBytes(str);
MainStream.Write(buf, 0, buf.Length);
}
