1 #include "stdafx.h" //控制台应用自带头文件,能够加快编译的速度
2 #include<winsock2.h> //通过该头文件调用winsock的函数,如下文的WSAStartup、bind()、connect()、inet_addr()等
3 #include<windows.h> //调用windows内核及接口函数
4 #include<stdio.h>
5 #include<stdlib.h>
6 #include<assert.h>
7 #pragma comment(lib,"ws2_32") //说明需要使用win32的库
8
9 int main(int argc, char* argv[]) {
10 int i;
11 SOCKET fd; //套接字初始化
12 SOCKADDR_IN addr; //该结构体初始化可以让我们对 “协议簇类型、网络地址、端口号”进行操作
13 WSADATA wsadata;
14
15 i = WSAStartup(0x0202, &wsadata); //说明Win32库的版本及对象
16 fd = socket(PF_INET, SOCK_STREAM, 0); //协议类型、地址、端口号的初始化
17 addr.sin_addr.S_un.S_addr = 0;
18 addr.sin_family = AF_INET;
19 addr.sin_port = 0;
20
21 i = bind(fd, (sockaddr*)&addr, sizeof(SOCKADDR_IN)); //将上文的套接字进行绑定
22
23 addr.sin_addr.S_un.S_addr = inet_addr("202.119.224.201"); //确定IP地址和端口号
24 addr.sin_port = ntohs(80);
25
26 i = connect(fd, (sockaddr*)&addr, sizeof(SOCKADDR_IN)); //尝试进行TCP三次握手
27 if (i == NOERROR) {
28 char *Buffer = new char[8193];
29 i = sprintf(Buffer, "GET / HTTP/1.1
" //HTTP协议的语法格式
30 "Host:www.njupt.edu.cn
"
31 "User-Agent:whatever
"
32 "Accept-Type:*/*
"
33 "Connection:close
"
34 "X-Power:XXX
"); //注意这里要空一行,因为HTTP头与体之间需要空一行进行区分
//否则对方服务器无法识别,请求无法通过
35 int n = send(fd, Buffer, i, 0); //发送请求数据
36 if (n == i) {
37 do {
38 i = recv(fd, Buffer, 8192, 0); //接收服务器响应
39 if (i <= 0) {
40 printf("closed by peer:%d
", i);
41 break;
42 }
43 Buffer[i] = '