1 封裝server
1.1 概述
對server的分裝和對client的封裝很類似。
1.2 代碼實現
MessageHeader.hpp：
#ifndef _MessageHeader_hpp_
#define _MessageHeader_hpp_
enum CMD
{
CMD_LOGIN,
CMD_LOGIN_RESULT,
CMD_LOGOUT,
CMD_LOGOUT_RESULT,
CMD_NEW_USER_JOIN,
CMD_ERROR
};
struct DataHeader
{
short dataLength;
short cmd;
};
//DataPackage
struct Login : public DataHeader
{
Login()
{
dataLength = sizeof(Login);
cmd = CMD_LOGIN;
}
char userName[32];
char PassWord[32];
};
struct LoginResult : public DataHeader
{
LoginResult()
{
dataLength = sizeof(LoginResult);
cmd = CMD_LOGIN_RESULT;
result = 0;
}
int result;
};
struct Logout : public DataHeader
{
Logout()
{
dataLength = sizeof(Logout);
cmd = CMD_LOGOUT;
}
char userName[32];
};
struct LogoutResult : public DataHeader
{
LogoutResult()
{
dataLength = sizeof(LogoutResult);
cmd = CMD_LOGOUT_RESULT;
result = 0;
}
int result;
};
struct NewUserJoin : public DataHeader
{
NewUserJoin()
{
dataLength = sizeof(NewUserJoin);
cmd = CMD_NEW_USER_JOIN;
scok = 0;
}
int scok;
};
#endif // !_MessageHeader_hpp_
EasyTcpServer.hpp：
#ifndef _EasyTcpServer_hpp_
#define _EasyTcpServer_hpp_
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include<windows.h>
#include<WinSock2.h>
#pragma comment(lib,"ws2_32.lib")
#else
#include<unistd.h> //uni std
#include<arpa/inet.h>
#include<string.h>
#define SOCKET int
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR (-1)
#endif
#include<stdio.h>
#include<vector>
#include"MessageHeader.hpp"
class EasyTcpServer
{
private:
SOCKET _sock;
std::vector<SOCKET> g_clients;
public:
EasyTcpServer()
{
_sock = INVALID_SOCKET;
}
virtual ~EasyTcpServer()
{
Close();
}
//初始化Socket
SOCKET InitSocket()
{
#ifdef _WIN32
//啓動Windows socket 2.x環境
WORD ver = MAKEWORD(2, 2);
WSADATA dat;
WSAStartup(ver, &dat);
#endif
if (INVALID_SOCKET != _sock)
{
printf("<socket=%d>關閉舊連接...\n", (int)_sock);
Close();
}
_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (INVALID_SOCKET == _sock)
{
printf("錯誤，建立socket失敗...\n");
}
else {
printf("建立socket=<%d>成功...\n", (int)_sock);
}
return _sock;
}
//綁定IP和端口號
int Bind(const char* ip, unsigned short port)
{
//if (INVALID_SOCKET == _sock)
//{
// InitSocket();
//}
// 2 bind 綁定用於接受客戶端連接的網絡端口
sockaddr_in _sin = {};
_sin.sin_family = AF_INET;
_sin.sin_port = htons(port);//host to net unsigned short
#ifdef _WIN32
if (ip){
_sin.sin_addr.S_un.S_addr = inet_addr(ip);
}
else {
_sin.sin_addr.S_un.S_addr = INADDR_ANY;
}
#else
if (ip) {
_sin.sin_addr.s_addr = inet_addr(ip);
}
else {
_sin.sin_addr.s_addr = INADDR_ANY;
}
#endif
int ret = bind(_sock, (sockaddr*)&_sin, sizeof(_sin));
if (SOCKET_ERROR == ret)
{
printf("錯誤,綁定網絡端口<%d>失敗...\n", port);
}
else {
printf("綁定網絡端口<%d>成功...\n", port);
}
return ret;
}
//監聽端口號
int Listen(int n)
{
// 3 listen 監聽網絡端口
int ret = listen(_sock, n);
if (SOCKET_ERROR == ret)
{
printf("socket=<%d>錯誤,監聽網絡端口失敗...\n",_sock);
}
else {
printf("socket=<%d>監聽網絡端口成功...\n", _sock);
}
return ret;
}
//接受客戶端連接
SOCKET Accept()
{
// 4 accept 等待接受客戶端連接
sockaddr_in clientAddr = {};
int nAddrLen = sizeof(sockaddr_in);
SOCKET _cSock = INVALID_SOCKET;
#ifdef _WIN32
_cSock = accept(_sock, (sockaddr*)&clientAddr, &nAddrLen);
#else
_cSock = accept(_sock, (sockaddr*)&clientAddr, (socklen_t *)&nAddrLen);
#endif
if (INVALID_SOCKET == _cSock)
{
printf("socket=<%d>錯誤,接受到無效客戶端SOCKET...\n", (int)_sock);
}
else
{
NewUserJoin userJoin;
SendDataToAll(&userJoin);
g_clients.push_back(_cSock);
printf("socket=<%d>新客戶端加入：socket = %d,IP = %s \n", (int)_sock, (int)_cSock, inet_ntoa(clientAddr.sin_addr));
}
return _cSock;
}
//關閉Socket
void Close()
{
if (_sock != INVALID_SOCKET)
{
#ifdef _WIN32
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
closesocket(g_clients[n]);
}
// 8 關閉套節字closesocket
closesocket(_sock);
//------------
//清除Windows socket環境
WSACleanup();
#else
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
close(g_clients[n]);
}
// 8 關閉套節字closesocket
close(_sock);
#endif
}
}
//處理網絡消息
bool OnRun()
{
if (isRun())
{
//伯克利套接字 BSD socket
fd_set fdRead;//描述符（socket） 集合
fd_set fdWrite;
fd_set fdExp;
//清理集合
FD_ZERO(&fdRead);
FD_ZERO(&fdWrite);
FD_ZERO(&fdExp);
//將描述符（socket）加入集合
FD_SET(_sock, &fdRead);
FD_SET(_sock, &fdWrite);
FD_SET(_sock, &fdExp);
SOCKET maxSock = _sock;
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
FD_SET(g_clients[n], &fdRead);
if (maxSock < g_clients[n])
{
maxSock = g_clients[n];
}
}
///nfds 是一個整數值 是指fd_set集合中所有描述符(socket)的範圍，而不是數量
///既是所有文件描述符最大值+1 在Windows中這個參數可以寫0
timeval t = { 1,0 };
int ret = select(maxSock + 1, &fdRead, &fdWrite, &fdExp, &t);
if (ret < 0)
{
printf("select任務結束。\n");
Close();
return false;
}
//判斷描述符（socket）是否在集合中
if (FD_ISSET(_sock, &fdRead))
{
FD_CLR(_sock, &fdRead);
Accept();
}
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
if (FD_ISSET(g_clients[n], &fdRead))
{
if (-1 == RecvData(g_clients[n]))
{
auto iter = g_clients.begin() + n;//std::vector<SOCKET>::iterator
if (iter != g_clients.end())
{
g_clients.erase(iter);
}
}
}
}
return true;
}
return false;
}
//是否工作中
bool isRun()
{
return _sock != INVALID_SOCKET;
}
//接收數據 處理粘包 拆分包
int RecvData(SOCKET _cSock)
{
//緩衝區
char szRecv[4096] = {};
// 5 接收客戶端數據
int nLen = (int)recv(_cSock, szRecv, sizeof(DataHeader), 0);
DataHeader* header = (DataHeader*)szRecv;
if (nLen <= 0)
{
printf("客戶端<Socket=%d>已退出，任務結束。\n", _cSock);
return -1;
}
recv(_cSock, szRecv + sizeof(DataHeader), header->dataLength - sizeof(DataHeader), 0);
OnNetMsg(_cSock, header);
return 0;
}
//響應網絡消息
virtual void OnNetMsg(SOCKET _cSock, DataHeader* header)
{
switch (header->cmd)
{
case CMD_LOGIN:
{
Login* login = (Login*)header;
printf("收到客戶端<Socket=%d>請求：CMD_LOGIN,數據長度：%d,userName=%s PassWord=%s\n", _cSock, login->dataLength, login->userName, login->PassWord);
//忽略判斷用戶密碼是否正確的過程
LoginResult ret;
send(_cSock, (char*)&ret, sizeof(LoginResult), 0);
}
break;
case CMD_LOGOUT:
{
Logout* logout = (Logout*)header;
printf("收到客戶端<Socket=%d>請求：CMD_LOGOUT,數據長度：%d,userName=%s \n", _cSock, logout->dataLength, logout->userName);
//忽略判斷用戶密碼是否正確的過程
LogoutResult ret;
send(_cSock, (char*)&ret, sizeof(ret), 0);
}
break;
default:
{
DataHeader header = { 0,CMD_ERROR };
send(_cSock, (char*)&header, sizeof(header), 0);
}
break;
}
}
//發送指定Socket數據
int SendData(SOCKET _cSock, DataHeader* header)
{
if (isRun() && header)
{
return send(_cSock, (const char*)header, header->dataLength, 0);
}
return SOCKET_ERROR;
}
void SendDataToAll(DataHeader* header)
{
for (int n = (int)g_clients.size() - 1; n >= 0; n--)
{
SendData(g_clients[n], header);
}
}
};
#endif // !_EasyTcpServer_hpp_
server.cpp：
#include "EasyTcpServer.hpp"
int main()
{
EasyTcpServer server;
server.InitSocket();
server.Bind(nullptr, 4567);
server.Listen(5);
while (server.isRun())
{
server.OnRun();
//printf("空閒時間處理其它業務..\n");
}
server.Close();
printf("已退出。\n");
getchar();
return 0;
}
參考資料：