C++实现模拟登录---发送post表单信息包

来源：互联网发布：数据制作包视频教程编辑：程序博客网时间：2024/05/17 00:57

测试网址为：http://www.exam8.com/

测试网址ip：222.73.24.32

测试帐号：lzh_2

密码：123456789

首先要确定提交表单的信息，我用抓包工具抓了post的包，然后写程序模拟发送过程，实现了登录过程。

注意事项：

1.一定要按照抓包的信息发送，甚至空格、换行数都要一样；

2.模拟登录的网页没有验证码；

代码：

//post发送表单信息模拟登录#include<stdio.h>#include<string>#include<winsock2.h>#include<windows.h>#include<iostream>#include<fstream>#pragma comment(lib, "ws2_32.lib")#define max 20480using namespace std;int main(){int num,sum;SOCKET s;WSADATA wsa;struct sockaddr_in serv;char sndBuf[max], rcvBuf[max];WSAStartup(MAKEWORD(2, 1), &wsa);if ((s = socket(AF_INET, SOCK_STREAM, 0))<0){perror("socket error!");exit(1);}memset(&serv,0,sizeof(serv));serv.sin_family = AF_INET;serv.sin_port = htons(80);//serv.sin_addr.s_addr = *((int*)*host_addr->h_addr_list);serv.sin_addr.S_un.S_addr = inet_addr("222.73.24.32");if ((connect(s, (struct sockaddr *)&serv, sizeof(serv)))<0){perror("connet error!");exit(1);}memset(sndBuf, 0, max);memset(rcvBuf, 0, max);//头信息    strcat(sndBuf, "POST ");    strcat(sndBuf, "/inc/Check.asp HTTP/1.1\r\n");    strcat(sndBuf, "x-requested-with: XMLHttpRequest\r\n");strcat(sndBuf, "Accept-Language: zh-cn\r\n");    strcat(sndBuf, "Referer: http://user.exam8.com/user_login.asp");    strcat(sndBuf, "\r\n");strcat(sndBuf, "Accept: */*\r\n");strcat(sndBuf, "Content-Type: application/x-www-form-urlencoded\r\n");strcat(sndBuf, "Accept-Encoding: gzip, deflate\r\n");strcat(sndBuf, "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; eSobiSubscriber 1.0.0.40; MAAR; .NET4.0C; .NET4.0E; Maxthon/3.0)\r\n");strcat(sndBuf, "Host: user.exam8.com\r\n");strcat(sndBuf, "Content-Length: 61\r\n");strcat(sndBuf, "Connection: Keep-Alive\r\n");strcat(sndBuf, "Cache-Control: no-cache\r\n");strcat(sndBuf, "Cookie: Hm_lvt_80e97646f045b0632f81239c03c83492=1415795254,1415797440; referrer=http%3A//www.baidu.com/s%3Fwd%3D%25e8%2580%2583%25e8%25af%2595%25e5%2590%25a7%26rsv_spt%3D1%26issp%3D1%26f%3D3%26rsv_bp%3D0%26rsv_idx%3D2%26ie%3Dutf-8%26tn%3Dmaxthon2%26rsv_sug3%3D3%26rsv_sug4%3D126%26rsv_sug1%3D1%26oq%3Dkaoshi%26rsp%3D0%26rsv_sug5%3D0; CNZZDATA89268=cnzz_eid%3D1936228237-1415277587-http%253A%252F%252Fuser.exam8.com%252F%26ntime%3D1415871209; ASPSESSIONIDAARTBSDT=AGDHGJFCMKBDAGLGHINHACEN\r\n");strcat(sndBuf, "\r\n");strcat(sndBuf, "Action=login&LoginUserName=lzh_2&LoginUserPassword=123456789&");puts(sndBuf);  if ((num = send(s,sndBuf,max, 0))<0)    {perror("send error!");exit(1);}puts("send success!\n");sum = recv(s, rcvBuf, max-1, 0);//如果rcvBuf的存储空间减小，则分几次copyif(sum>0){puts("OK!"); printf("%s",rcvBuf);}puts("\nread success!\n");closesocket(s);system("pause");WSACleanup();return 0;}

运行结果：

1.发送信息

2.发送成功返回信息：

3.登录成功返回信息：

4.输入错误的用户名或密码：

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