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我正在尝试编写一个服务器应用程序包装器,就像我对任何应用程序一样,我已经搜索了一个多星期,以寻找至少不错的异步套接字指南或教程(这个包装器必须是异步的),到目前为止我能这样做是:

#ifndef _SERVER_H
#define _SERVER_H

#include "asynserv.h" // header file with the important lib includes
#include <map>

namespace Connections
{
    DWORD WINAPI MainThread(LPVOID lParam); // Main thread
    DWORD WINAPI DataThread(LPVOID lParam); // thread that will be created for each client
    struct ClientServer // struct to keep a server and a client pair.
    {
    public:
        struct Client* Client;
        class Server* Server;
    };
    struct Client // a struct wrapper to keep clients
    {
    public:
        Client(SOCKET Connection, int BufferSize, UINT ID);
        ~Client();
        SOCKET WorkerSocket;
        char Buffer[255];
        bool Connected;
        int RecvSize;
        UINT UID;
        void Send(char * Data);
        void Disconnect();
    };
    class Server
    {
    private:
        SOCKET WorkerSocket;
        SOCKADDR_IN EndPnt;
        UINT ID;
        int CBufferSize;
    public:
        Server(int Port, int Backlog, int BufferSize);
        ~Server();
        __event void ClientRecieved(Client* Clientr, char * RecData);
        bool Enabled;
        int Port;
        int Backlog;
        HWND ReqhWnd;
        std::map<UINT, Client*> ClientPool;
        void WaitForConnections(Server*);
        void WaitForData(Client*);
        void InvokeClientDC(UINT);
        void Startup();
        void Shutdown();
    };
}
#endif

服务器.cpp:

#include "Server.h"

namespace Connections
{
    void Server::Startup()
    {
        WSADATA wsa;
        WSAStartup(0x0202, &wsa);
        this->WorkerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        this->EndPnt.sin_addr.s_addr = ADDR_ANY;
        this->EndPnt.sin_family = AF_INET;
        this->EndPnt.sin_port = htons(this->Port);
        this->Enabled = true;
        this->ID = 0;
        bind(this->WorkerSocket, (SOCKADDR*)&this->EndPnt, sizeof(this->EndPnt));
        printf("[AsynServer]Bound..\n");
        listen(this->WorkerSocket, this->Backlog);
                CreateThread(NULL, NULL, &MainThread, this, NULL, NULL);
    }
    void Server::WaitForConnections(Server * Ser)
    {
        WSAEVENT Handler = WSA_INVALID_EVENT;
        while(Ser->Enabled)
        {
            Handler = WSACreateEvent();
            WSAEventSelect(Ser->WorkerSocket, Handler, FD_ACCEPT);
            WaitForSingleObject(Handler, INFINITE);
            SOCKET accptsock = accept(Ser->WorkerSocket, NULL, NULL);
            Client * NewClient = new Client(accptsock, 255, Ser->ID++);
            NewClient->Connected = true;
            printf("[AsynServer]Client connected.\n");
            ClientServer * OurStruct = new ClientServer();
            OurStruct->Server = Ser;
            OurStruct->Client = NewClient;
            CreateThread(NULL, NULL, &DataThread, OurStruct, NULL, NULL);
        }
    }
    void Server::WaitForData(Client * RClient)
    {
        WSAEVENT Tem = WSA_INVALID_EVENT;
        Tem = WSACreateEvent();
        WSAEventSelect(RClient->WorkerSocket, Tem, FD_READ);
        while(RClient->Connected)
        {
            WaitForSingleObject(Tem, INFINITE);
            RClient->RecvSize = recv(RClient->WorkerSocket, RClient->Buffer, 255, NULL);
            if(RClient->RecvSize > 0)
            {
                RClient->Buffer[RClient->RecvSize] = '\0';
                __raise this->ClientRecieved(RClient, RClient->Buffer);
                Sleep(50);
            }
        }
        return;
    }
    DWORD WINAPI MainThread(LPVOID lParam)
    {
        ((Server*)lParam)->WaitForConnections((Server*)lParam);
        return 0;
    }
    DWORD WINAPI DataThread(LPVOID lParam)
    {
        ClientServer * Sta = ((ClientServer*)lParam);
        Sta->Server->WaitForData(Sta->Client);
        return 0;
    }
}

现在在创建服务器实例并创建主线程之后,我可以同时接受客户端并读取它们发送的数据,但是在两次连接后,我的 CPU 会延迟到 100% 使用率。我想我的方法不正确,所以我的问题是有人可以指出我的代码中可能存在的缺陷,或者只是为我指出一个不错的异步套接字指南,前提是我已经搜索了一个多星期没有结果(可能我的绝望阻碍了我选择正确的关键字:|)。在此先感谢并为大量代码感到抱歉,只要允许就对其进行修剪。

制造,简单但完美。

4

1 回答 1

2

第一个错误:在 Server::WaitForConnections 中,每次执行 while 循环时都会创建 HEVENT (Handler = WSACreateEvent() ) 而不会破坏它。将 HEVENT 创建移到 while 循环之外。

第二个错误:你的缓冲区是 255 长(字符),但你这样做: RClient->Buffer[RClient->RecvSize] = '\0'; 其中 RClient->RecvSize 可以是缓冲区大小的精确值 - 这意味着您使 classis “缓冲区溢出”。

我希望这有帮助。多米尼克

于 2010-02-04T13:31:56.827 回答