/// <summary>
/// Manage a profile image dowload of a remote user
/// </summary>
/// <param name="client">TCPClient</param>
/// <param name="stream">NetworkStream of the client</param>
/// <param name="ip">Remote Ip</param>
/// <param name="fileOriginal">Original file name</param>
/// <param name="dim">Lenght of the file (bytes)</param>
async Task ServeReceiveProfileImage(TcpClient client, NetworkStream stream, string ip, string fileOriginal, long dim)
{
string filename = Utility.PathHost() + "\\" + fileOriginal;
int i = 0;
string hash_s = "";
byte[] bytes = new byte[32];
if ((i = await stream.ReadAsync(bytes, 0, bytes.Length)) != 0)
{
try {
hash_s = BitConverter.ToString(bytes).Replace("-", string.Empty);
}
catch (Exception) {
throw new Exception("Pacchetto inviato non corretto");
}
}
else
{
throw new Exception("Pacchetto inviato non corretto");
};
// Wait end asyncronous operation to check if a file already exists or not with the same name
await semaphoreProfileImage.WaitAsync();
if (_referenceData.GetRemoteUserHashImage(ip).Equals(hash_s))
{
semaphoreProfileImage.Release();
return;
}
bytes = new byte[bufferSize * 64];
if (File.Exists(filename))
{
string[] parts = fileOriginal.Split('.');
string extension = parts[parts.Length - 1];
parts = parts.Take(parts.Count() - 1).ToArray();
string name = String.Join(".", parts);
int numb = Directory.GetFiles(Utility.PathHost(), name + "*" + extension).Length;
filename = Utility.PathHost() + "\\" + name + "_(" + numb + ")." + extension;
}
FileStream fileImage = null;
try {
fileImage = File.Create(filename);
Console.WriteLine($"{DateTime.Now.ToString()}\t - ProfileImage File Created on path {filename}");
long dataReceived = dim;
while (((i = await stream.ReadAsync(bytes, 0, bytes.Length)) != 0) && dataReceived >= 0)
{
if (dataReceived > 0 && dataReceived < i)
{
await fileImage.WriteAsync(bytes, 0, Convert.ToInt32(dataReceived));
}
else
{
await fileImage.WriteAsync(bytes, 0, i);
}
dataReceived -= i;
}
fileImage.Close();
using (SHA256 sha = SHA256.Create()) {
FileStream fs = File.OpenRead(filename);
byte[] hash = sha.ComputeHash(fs);
string hashimage = BitConverter.ToString(hash).Replace("-", string.Empty);
fs.Close();
if (!_referenceData.ProfileImageUpdate(hashimage, filename, ((IPEndPoint)client.Client.RemoteEndPoint).Address.ToString()))
{
File.Delete(filename);
}
}
semaphoreProfileImage.Release();
}
catch (Exception e) {
Console.WriteLine($"{DateTime.Now.ToString()}\t - ServeReceiveProfileImage Exception - {e.GetType()} {e.Message}");
semaphoreProfileImage.Release();
if (fileImage != null)
{
File.Delete(filename);
}
}
}
