private void proccessCommonValues(DataHoldingUserToken userToken, string receivedData, int startIndex)
{
userToken.uImageHolder.IMEI = receivedData.Substring(startIndex + 2, 15);
userToken.uImageHolder.PictureNumber = Convert.ToInt32(receivedData.Substring(startIndex + 17, 5));
userToken.uImageHolder.TotalPackages = Convert.ToInt32(receivedData.Substring(startIndex + 22, 3));
userToken.uImageHolder.LastPackageSequence = Convert.ToInt32(receivedData.Substring(startIndex + 25, 3));
}
public int handleMessage(SocketAsyncEventArgs saea, DataHoldingUserToken userToken, int bytesToProcess, out byte[] readyMessage)
{
if (userToken.messageBytesDoneCount == 0)
{
userToken.messageBytes = new byte[userToken.messageLength];
}
int length = Math.Min(userToken.messageLength - userToken.messageBytesDoneCount, bytesToProcess);
Buffer.BlockCopy(saea.Buffer, saea.Offset + userToken.bytesDoneThisOp,
userToken.messageBytes, userToken.messageBytesDoneCount, length);
userToken.messageBytesDoneCount += length;
userToken.bytesDoneThisOp += length;
readyMessage = null;
if (userToken.messageBytesDoneCount == userToken.messageLength)
{
//// сообщение готово
readyMessage = new byte[userToken.prefixBytes.Length + userToken.messageBytes.Length];
Buffer.BlockCopy(userToken.prefixBytes, 0, readyMessage, 0, userToken.prefixBytes.Length);
Buffer.BlockCopy(userToken.messageBytes, 0, readyMessage, userToken.prefixBytes.Length, userToken.messageBytes.Length);
}
//return bytesToProcess - length;
return(0);
}
private void saveImageToDisc(DataHoldingUserToken userToken)
{
string fileName = userToken.uImageHolder.IMEI + DateTime.UtcNow.ToString("yyyy_MM_dd_HH_mm") + ".jpg";
string imageFilePath = Path.Combine(Settings.Default.ImageSaveDirectory, fileName);
FileStream fs = new FileStream(imageFilePath, FileMode.Create);
for (int i = 0; i < userToken.uImageHolder.ImageBytes.Length; i++)
{
fs.Write(userToken.uImageHolder.ImageBytes[i], 0, userToken.uImageHolder.ImageBytes[i].Length);
}
fs.Close();
}
public int handle(SocketAsyncEventArgs saea, DataHoldingUserToken userToken, out byte[] readyMessage)
{
readyMessage = new byte[userToken.prefixBytes.Length + saea.BytesTransferred - userToken.bytesDoneThisOp];
Buffer.BlockCopy(userToken.prefixBytes, 0, readyMessage, 0, userToken.prefixBytes.Length);
Buffer.BlockCopy(saea.Buffer, userToken.bytesDoneThisOp, readyMessage,
userToken.prefixBytes.Length, saea.BytesTransferred - userToken.bytesDoneThisOp);
userToken.bytesDoneThisOp = saea.BytesTransferred;
userToken.messageBytes = readyMessage;
userToken.messageLength = readyMessage.Length;
return(0);
}
public void defineTypeData(SocketAsyncEventArgs saea, DataHoldingUserToken userToken)
{
var prefix = Encoding.ASCII.GetString(userToken.prefixBytes);
if (prefix.StartsWith("$$"))
{
// это пакет, проверяем его, если он нормальный устанавливаем длину ожидаемого сообщения
try
{
userToken.messageLength = Convert.ToInt32(prefix.Substring(2), 16) - 4;
if (userToken.messageLength > 0)
{
userToken.dataTypeId = 1;
}
}
catch
{
log.WarnFormat("Someone sended us a bad packet size prefix={0} his IP={1}", prefix,
((IPEndPoint)saea.AcceptSocket.RemoteEndPoint).Address);
}
}
else if (prefix.StartsWith("Rece"))
{
// это ответ на команду
// например Receive:'015'ok*000000,015,0,195.206.252.247,40181#
userToken.dataTypeId = 2;
}
else if (prefix.StartsWith("AT+C"))
{
userToken.dataTypeId = 3;
}
else if (prefix.StartsWith("IMEI"))
{
userToken.dataTypeId = 4;
}
else if (prefix.StartsWith("$U"))
{
userToken.dataTypeId = 7;
}
else
{
userToken.dataTypeId = 5;
// непонятно что прислали
log.WarnFormat("Someone sended us a bad packet with prefix={0} his IP={1}", prefix,
((IPEndPoint)saea.AcceptSocket.RemoteEndPoint).Address);
}
}
public void clearFromCRLF(SocketAsyncEventArgs saea, DataHoldingUserToken userToken)
{
// допустим что это старт, начало новой команды или новой посылки от блока
while (saea.BytesTransferred > userToken.bytesDoneThisOp)
{
if (saea.Buffer[userToken.bytesDoneThisOp] == 0x0D ||
saea.Buffer[userToken.bytesDoneThisOp] == 0x0A)
{
userToken.bytesDoneThisOp++;
}
else
{
break;
}
}
}
public int handleResponse(SocketAsyncEventArgs saea, DataHoldingUserToken userToken, out byte[] readyMessage)
{
readyMessage = null;
int cnt = 0;
while (saea.BytesTransferred > (userToken.bytesDoneThisOp + cnt))
{
if (saea.Buffer[userToken.bytesDoneThisOp + cnt] == 0x23)
{
cnt++;
break;
}
cnt++;
if (cnt > 200)
{
// гипотетически ответ не больше 200 байт, нужно закрыть сокет ином случае
return(-1);
}
}
byte[] message = new byte[cnt + userToken.messageBytesDoneCount];
if (userToken.messageBytesDoneCount != 0)
{
Buffer.BlockCopy(userToken.messageBytes, 0, message, 0, userToken.messageBytesDoneCount);
}
Buffer.BlockCopy(saea.Buffer, userToken.bytesDoneThisOp, message, userToken.messageBytesDoneCount, cnt);
userToken.messageBytes = message;
userToken.messageBytesDoneCount += cnt;
userToken.bytesDoneThisOp += cnt;
if (userToken.messageBytes[userToken.messageBytes.Length - 1] == 0x23)
{
readyMessage = new byte[userToken.prefixBytes.Length + userToken.messageBytes.Length];
Buffer.BlockCopy(userToken.prefixBytes, 0, readyMessage, 0, userToken.prefixBytes.Length);
Buffer.BlockCopy(userToken.messageBytes, 0, readyMessage, userToken.prefixBytes.Length, userToken.messageBytes.Length);
}
return(0);
}
public int handlePrefix(SocketAsyncEventArgs rs, DataHoldingUserToken userToken, int bytesToProcess)
{
if (bytesToProcess == 0 || userToken.prefixBytesDoneCount >= RECEIVE_PREFIX_LENGTH)
{
return(bytesToProcess);
}
if (userToken.prefixBytesDoneCount == 0)
{
userToken.prefixBytes = new byte[RECEIVE_PREFIX_LENGTH];
}
int length = Math.Min(RECEIVE_PREFIX_LENGTH - userToken.prefixBytesDoneCount, bytesToProcess);
Buffer.BlockCopy(rs.Buffer, rs.Offset + userToken.bytesDoneThisOp,
userToken.prefixBytes, userToken.prefixBytesDoneCount, length);
userToken.prefixBytesDoneCount += length;
userToken.bytesDoneThisOp += length;
return(bytesToProcess - length);
}
public int handle(SocketAsyncEventArgs saea, DataHoldingUserToken userToken, out byte[] readyMessage)
{
readyMessage = null;
int cnt = 0;
while (saea.BytesTransferred > (userToken.bytesDoneThisOp + cnt))
{
cnt++;
if (saea.Buffer[userToken.bytesDoneThisOp + cnt - 1] == 0x23)
{
break;
}
}
log.DebugFormat("Photo packet cnt={0}", cnt);
byte[] message = new byte[cnt + userToken.messageBytesDoneCount];
if (userToken.messageBytesDoneCount != 0)
{
Buffer.BlockCopy(userToken.messageBytes, 0, message, 0, userToken.messageBytesDoneCount);
}
Buffer.BlockCopy(saea.Buffer, userToken.bytesDoneThisOp, message, userToken.messageBytesDoneCount, cnt);
userToken.messageBytes = message;
userToken.messageBytesDoneCount += cnt;
userToken.bytesDoneThisOp += cnt;
if (userToken.messageBytes[userToken.messageBytes.Length - 1] == 0x23)
{
message = new byte[2 + userToken.messageBytes.Length];
Buffer.BlockCopy(userToken.prefixBytes, 2, message, 0, 2);
Buffer.BlockCopy(userToken.messageBytes, 0, message, 2, userToken.messageBytes.Length);
userToken.resetReadyMessage();
string receivedData = Encoding.ASCII.GetString(message, 0, message.Length - 1);
log.DebugFormat("Photo packet={0}", receivedData);
int indexOfImageBytes = 26;
int indexOfStartPackage = 0;
proccessCommonValues(userToken, receivedData, indexOfStartPackage - 2);
if (userToken.uImageHolder.LastPackageSequence == 1)
{
userToken.uImageHolder.ImageBytes = new byte[userToken.uImageHolder.TotalPackages][];
}
if (userToken.uImageHolder.ImageBytes == null)
{
return(0);
}
userToken.uImageHolder.ImageBytes[userToken.uImageHolder.LastPackageSequence - 1] = StringToByteArray(receivedData.Substring(indexOfImageBytes));
if (userToken.uImageHolder.LastPackageSequence == userToken.uImageHolder.TotalPackages)
{
// 1) save image to file
saveImageToDisc(userToken);
// 2) reset imageHolder
userToken.uImageHolder = new UImageHolder();
}
}
return(0);
}