TCP一个简单应用

#include "stdafx.h"
#include<WinSock2.h>
#include<windows.h>
#include<iostream>
using namespace std;
#pragma comment (lib,"ws2_32.lib") 
//Client
int main()
{
    WSADATA wsa;
    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
    {
        cout << "网络环境初始化失败" << endl;
        return -1;
    }
    SOCKET sSever = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (sSever==INVALID_SOCKET)
    {
        cout << "套接字创建失败" << endl;
        closesocket(sSever);
        WSACleanup();
        return -1;
    }
    SOCKADDR_IN si;
    si.sin_family = AF_INET;
    si.sin_port = htons(80);
    si.sin_addr.S_un.S_addr = inet_addr("14.215.177.38");
    int ret = connect(sSever, (sockaddr *)&si, sizeof(sockaddr));
    if (ret==SOCKET_ERROR)
    {
        cout << "网络连接失败" << endl;
        closesocket(sSever);
        WSACleanup();
        return -1;
    }
    char *request = "GET /index.html HTTP/1.1\r\n"
        "User-Agent:Mozilla/4.0\r\n"
        "Host:www.baidu.com\r\n\r\n";
    ret = send(sSever, request, strlen(request), 0);
    if (ret == SOCKET_ERROR)
    {
        cout << "发送失败" << endl;
        closesocket(sSever);
        WSACleanup();
        return -1;
    }
    int recvLen = 1;
    char *szBuf=new char[10240000];
    memset(szBuf, 0, sizeof(szBuf));
    while (recvLen>0)
    {
        recvLen = recv(sSever, szBuf, 10240000, 0);
        if (recvLen>0)
        {
            szBuf[recvLen] = 0;
        }
        else
        {
            szBuf[0] = 0;
        }
        printf("revc html resource from Sever:%s", szBuf);
    }
    delete[]szBuf;
    return 0;
}