Linux下C语言socket用post发送表单 【模拟网页提交表单】

http://blog.163.com/liguiqin_500/blog/static/763064200912693950579/

#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>

void posturl()
{
int sockfd;
struct sockaddr_in addr;
struct hostent *pURL;

char *pHost = 0, *pPOST = 0;
static char text[BUFSIZ];
char header[BUFSIZ] = "";
int i;

/*
* 设定socket参数,并未真正初始化
*/
sockfd = socket(AF_INET, SOCK_STREAM, 0);

addr.sin_family = AF_INET;
inet_aton("192.168.10.200",&addr.sin_addr);
addr.sin_port = htons(80);

/*
* 组织发送到web服务器的信息
* 为何要发送下面的信息请参考HTTP协议的约定
*/
strcat(header, "POST ");
strcat(header, "/pass");
strcat(header, " HTTP/1.1\r\n");
strcat(header, "*/*\r\n");
strcat(header, "Referer: \r\n");
strcat(header, "Accept-Language: zh-cn\r\n");
strcat(header,"Content-Type: application/x-www-form-urlencoded\r\n");
strcat(header, "HOST: ");
strcat(header, "192.168.10.200\r\n");
strcat(header, "Content-Length: 26\r\n");
strcat(header, "Connection: Keep-Alive\r\n");
strcat(header, "Cache-Control: no-cache\r\n\r\n");
strcat(header, "password=1234&submit=Apply");
strcat(header, "\r\n");

/*
* 连接到服务器，发送请求header，并接受反馈（即网页源代码）
*/
connect(sockfd,(struct sockaddr *)&addr,sizeof(struct sockaddr_in));

i = send(sockfd, header, strlen(header), 0);

printf("%d\n",i);

while ( recv(sockfd, text, BUFSIZ, 0) > 0)
{
printf("%s", text);
for(i = 0; i < BUFSIZ; i++)
text[i]='\0';
//strnset(text, '\0', BUFSIZ);
}

close(sockfd);


}

int main()
{
posturl();
return 0;
}

//*****************************************//
//*********利用C实现自动发包***************//
//*********作者：马   犇******************//
//*********时间：2011-6-25*****************//
//*****************************************//

#include "stdafx.h"
#include "stdio.h"
#include "stdlib.h"
#include "winsock2.h"
#pragma comment(lib,"ws2_32.lib")
int main(int argc, char* argv[])
{

  SOCKET hsocket;
  SOCKADDR_IN saServer;
  WSADATA     wsadata;
  LPHOSTENT lphostent;
  int nRet;
  char* host_name="www.********.com";
  char* reqHead="POST ********* HTTP/1.1\r\n" //此为要发送的数据包
        "Accept: */*\r\n"
        "Referer: *********\r\n"
        "Accept-Language: zh-CN\r\n"
        "User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; BOIE9;ZHCN; twchrome)\r\n"
        "Content-Type: application/x-www-form-urlencoded\r\n"
        "Accept-Encoding: gzip, deflate\r\n"
        "Host: www.*******.com\r\n"
        "Content-Length: 375\r\n"
        "Connection: Keep-Alive\r\n"
        "Cache-Control: no-cache\r\n"
        "Cookie: ************** \r\n\r\n"
        "user=test&pass=123";

 // 初始化套接字
    if(WSAStartup(MAKEWORD(2,2),&wsadata))
        printf("初始化SOCKET出错！");
    lphostent=gethostbyname(host_name);
    if(lphostent==NULL)
        printf("lphostent为空！");
    hsocket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    saServer.sin_family = AF_INET;
    saServer.sin_port = htons(80);
    saServer.sin_addr = *((LPIN_ADDR)*lphostent->h_addr_list);
    // 利用SOCKET连接
    nRet = connect(hsocket,(LPSOCKADDR)&saServer,sizeof(SOCKADDR_IN));
    if(nRet == SOCKET_ERROR)
    {
        printf("建立连接时出错！");
        closesocket(hsocket);
        return 0;
    }
    // 利用SOCKET发送

    nRet = send(hsocket,req,strlen(req),0);
    if(nRet==SOCKET_ERROR)
    {
        printf("发送数据包时出错！");
        closesocket(hsocket);
    }
    char   Dest[3000];
    nRet=1;
    while(nRet>0)
    {
        // 接收返回数据包
        nRet=recv(hsocket,(LPSTR)Dest,sizeof(Dest),0);
        if(nRet>0)
            Dest[nRet]=0;
        else
            Dest[0]=0;
        // 显示返回数据包的大小、内容
        printf("\nReceived   bytes:%d\n",nRet);
        printf("Result:\n%s",Dest);
    }
 }
    return 0;
}

C语言开发Linux下web服务器(支持GET/POST,SSL,目录显示等)
http://blog.csdn.net/yueguanghaidao/article/details/8450938/