private static void ReceiveCallback(IAsyncResult ar)
{
try
{
// Retrieve the state object and the client socket
// from the asynchronous state object.
ClientStateObject state = (ClientStateObject)ar.AsyncState;
Socket client = state.workSocket;
// Read data from the remote device.
int bytesRead = client.EndReceive(ar);
Console.WriteLine("Bytes Read: " + bytesRead);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
response = state.sb.ToString();
}
if (response.Equals("User created!") ||
response.Equals("User already exists!") ||
response.Equals("Login successful!") ||
response.Equals("Admin Login successful!") ||
response.Equals("Password incorrect!") ||
response.Equals("User doesn't exist!") ||
response.Equals("Some Messages") ||
response.Equals("Message Sent!") ||
isValidJSON(response) == true)
{
// All the data has arrived; put it in response.
if (isValidJSON(response) == true)
{
List <ChatMessage> receivedChatMessageList = JsonConvert.DeserializeObject <List <ChatMessage> >(response);
currentChatForm.populateChat(receivedChatMessageList);
}
// Signal that all bytes have been received.
state.sb.Clear();
receiveDone.Set();
Receive(client);
}
else
{
// Get the rest of the data.
client.BeginReceive(state.buffer, 0, ClientStateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString() + "Exception");
}
}
/**
* Receive and ReceiveCallBack are used to receive, decode, and handle the data
* received from the server as a response to the request from the client;
* @param client - the current socket, used to send requests
*/
private static void Receive(Socket client)
{
try
{
// Create the state object.
ClientStateObject state = new ClientStateObject();
state.workSocket = client;
// Begin receiving the data from the remote device.
client.BeginReceive(state.buffer, 0, ClientStateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
