Почему мой сервер получает меньше байтов, чем отправляет клиент?
У меня есть это Клиент-серверное приложение C#, и я начал с документации Microsoft Пример Асинхронного Клиентского Сокета | Microsoft Docs[^ Однако мне действительно нужно было изменить некоторые вещи, и мне нужно было бы, чтобы клиент отправил несколько сообщений на сервер, а также получил несколько обратно.
Начиная с нуля, например, я нахожусь в контроллере (который находится в клиенте) и отправляю это сообщение на сервер:
namespace client.ObjectHandler
{
public class BaseHandler
{
private AsynchronousClient asynchronousClient;
public static String username;
public BaseHandler(AsynchronousClient asynchronousClient = null)
{
this.asynchronousClient = asynchronousClient ?? new AsynchronousClient();
}
public User findByUsername(String username)
{
StringBuilder Content = new StringBuilder();
Content.Append("find user ");
Content.Append(username);
Content.Append(" <EOF>");
Message message = new Message { Content = Content.ToString() };
asynchronousClient.Send(message);
asynchronousClient.sendDone.WaitOne();
asynchronousClient.Receive();
asynchronousClient.receiveDone.WaitOne();
var result = asynchronousClient.response;
return result.userContent;
}
}
}
следовательно, сервер должен выполнять операции(в моем случае доступ к базе данных и т. д.). Это клиентский код:
using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Text;
using core;
using System.IO;
namespace client
{
public class AsynchronousClient
{
// The port number for the remote device.
private const int port = 9000;
// ManualResetEvent instances signal completion.
public ManualResetEvent connectDone =
new ManualResetEvent(false);
public ManualResetEvent sendDone =
new ManualResetEvent(false);
public ManualResetEvent receiveDone =
new ManualResetEvent(false);
// The response from the remote device.
public Message response = new Message();
private Socket client;
private IPHostEntry ipHostInfo;
private IPAddress ipAddress;
private IPEndPoint remoteEP;
public AsynchronousClient()
{
// Establish the remote endpoint for the socket.
// The name of the
// remote device is "localhost".
ipHostInfo = Dns.GetHostEntry("localhost");
ipAddress = ipHostInfo.AddressList[0];
remoteEP = new IPEndPoint(ipAddress, port);
// Create a TCP/IP socket.
client = new Socket(ipAddress.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
// Connect to the remote endpoint.
client.BeginConnect(remoteEP,
new AsyncCallback(ConnectCallback), client);
connectDone.WaitOne();
}
private void ConnectCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket client = (Socket)ar.AsyncState;
// Complete the connection.
client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}",
client.RemoteEndPoint.ToString());
// Signal that the connection has been made.
connectDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public void Receive()
{
try
{
// Create the state object.
StateObject state = new StateObject();
state.workSocket = client;
// Begin receiving the data from the remote device.
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private void ReceiveCallback(IAsyncResult ar)
{
try
{
// Retrieve the state object and the client socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket client = state.workSocket;
// Read data from the remote device.
int bytesRead = client.EndReceive(ar);
Message receivedMessage = new Message();
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
receivedMessage = (Message)Serializer.FromStream(new MemoryStream(state.buffer));
// Get the rest of the data.
client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReceiveCallback), state);
}
else
{
// All the data has arrived; put it in response.
response = receivedMessage;
// Signal that all bytes have been received.
receiveDone.Set();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
public void Send(Message message)
{
// Convert the string data to byte data using ASCII encoding.
MemoryStream stream = Serializer.ToStream(message);
byte[] byteData = stream.GetBuffer();
// Begin sending the data to the remote device.
client.BeginSend(byteData, 0, byteData.Length, 0,
new AsyncCallback(SendCallback), client);
}
private void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket client = (Socket)ar.AsyncState;
// Complete sending the data to the remote device.
int bytesSent = client.EndSend(ar);
Console.WriteLine("Sent {0} bytes to server.", bytesSent);
// Signal that all bytes have been sent.
sendDone.Set();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
}
и код сервера:
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using core;
using server;
public class AsynchronousSocketListener
{
// Thread signal.
public static ManualResetEvent allDone = new ManualResetEvent(false);
private IPHostEntry ipHostInfo;
private IPAddress ipAddress;
private IPEndPoint localEndPoint;
private Socket listener;
public AsynchronousSocketListener()
{
// Establish the local endpoint for the socket.
// The DNS name of the computer
// running the listener is "localhost".
ipHostInfo = Dns.GetHostEntry("localhost");
ipAddress = ipHostInfo.AddressList[0];
localEndPoint = new IPEndPoint(ipAddress, 9000);
// Create a TCP/IP socket.
listener = new Socket(ipAddress.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
}
public void StartListening()
{
// Bind the socket to the local endpoint and listen for incoming connections.
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
while (true)
{
// Set the event to nonsignaled state.
allDone.Reset();
// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
// Wait until a connection is made before continuing.
allDone.WaitOne();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
Console.WriteLine("\nPress ENTER to continue...");
Console.Read();
}
public static void AcceptCallback(IAsyncResult ar)
{
// Signal the main thread to continue.
allDone.Set();
// Get the socket that handles the client request.
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
// Create the state object.
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
public static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
// Retrieve the state object and the handler socket
// from the asynchronous state object.
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
// Read data from the client socket.
int bytesRead = handler.EndReceive(ar);
Message receivedMessage = new Message();
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
receivedMessage = (Message)Serializer.FromStream(new MemoryStream(state.buffer));
// Check for end-of-file tag. If it is not there, read
// more data.
content = receivedMessage.Content;
if (content.IndexOf("<EOF>") > -1)
{
// All the data has been read from the
// client. Display it on the console.
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
content.Length, content);
HandleMessage.handle(handler, receivedMessage);
// Echo the data back to the client.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
//Send(handler, receivedMessage);
}
else
{
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
private static void Send(Socket handler, Message message)
{
// Convert the string data to byte data using ASCII encoding.
MemoryStream stream = Serializer.ToStream(message);
byte[] byteData = stream.GetBuffer();
// Begin sending the data to the remote device.
handler.BeginSend(byteData, 0, byteData.Length, 0,
new AsyncCallback(SendCallback), handler);
}
private static void SendCallback(IAsyncResult ar)
{
try
{
// Retrieve the socket from the state object.
Socket handler = (Socket)ar.AsyncState;
// Complete sending the data to the remote device.
int bytesSent = handler.EndSend(ar);
Console.WriteLine("Sent {0} bytes to client.", bytesSent);
//handler.Shutdown(SocketShutdown.Both);
//handler.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
и способ справиться с handlemessage в это:
using System;
namespace server
{
public static class HandleMessage
{
private static BaseHandler baseHandler;
public static void handle(Socket handler, Message message)
{
baseHandler = new BaseHandler();
String[] received = message.Content.Split(' ');
if(received[0].CompareTo("find") == 0)
{
if(received[1].CompareTo("user") == 0)
{
var result = baseHandler.filterByUsername(received[2]);
Message sentMessage = new Message { userContent = result };
MemoryStream stream = Serializer.ToStream(sentMessage);
var bytesSent = handler.Send(stream.GetBuffer());
}
}
}
}
}
Что я уже пробовал:
Я попытался поставить сервер после отправки(обработчик, сообщение) beginReceive, но мой код блокируется, и я не нахожу ничего полезного