Post返回400错误，可能是发送的数据有问题谁来帮帮我

我是西瓜 2012-05-12 11:32:24

我写一个能通过post点击的我网页按钮的程序，可放回总是400错误
400 bad request
the request has an invalid header name
是我要发送的数据有问题吗请大家帮我看一看。



   protected void Button1_Click(object sender, EventArgs e)

    {

        Label1.Text = (int.Parse(Label1.Text) + 1).ToString();

    }







#include "stdio.h"

#include "stdlib.h"

#include "winsock2.h"

#include"conio.h"

#pragma comment(lib,"ws2_32.lib")



int main()

{



  SOCKET hsocket;

  SOCKADDR_IN saServer;

  WSADATA     wsadata;

  LPHOSTENT lphostent;

  int     nRet;

  char*   host_name="192.168.219.1";

  char*   reqHead="POST /default.aspx HTTP/1.1\r\n"

	  "pragma:no-cache\r\n"

"Accept:text/html, application/xhtml+xml, */*\r\n"

"Referer:http://192.168.219.1/default.aspx\r\n"

"Accept-Language:zh-CN\r\n"

"User-Agent:Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)\r\n"

"Content-Type:application/x-www-form-urlencoded\r\n"

"Accept-Encoding:gzip,deflate\r\n"

"Host:192.168.219.1\r\n"

"Content-Length:192\r\n"

"Connection:Keep-Alive\r\n"

"Cache-Control:no-cache\r\n"

"__VIEWSTATE=%2FwEPDwUKLTMyNDcxODYzNQ9kFgICAw9kFgICAw8PFgIeBFRleHQFATJkZGSwHfmZ0K4tQfRw3xFfLisrdyd0wg%3D%3D&__EVENTVALIDATION=%2FwEWAgKWw8aHBgKM54rGBmWhGwUcHj2AyR2%2BpwXvfu0qkwRW&Button1=Button";



// 初始化套接字 

  while(1)

  {

    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 







if(getch()=='1')

{

    nRet = send(hsocket,reqHead,strlen(reqHead),0);  

    if(nRet==SOCKET_ERROR)  

    {  

        printf("发送数据包时出错！");  

        closesocket(hsocket);  

    }  

    char   Dest[3000];  memset(Dest,0,3000);      

    nRet=1;     

    while(nRet>0)     

    {  

		 //send(hsocket,reqHead,strlen(reqHead),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);    

		

    }

}

	}



}

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suyuwen1 2014-12-11

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400不一定是存在错误，可能是浏览器预加载造成，这篇文章测试了。 http://www.ihref.com/read-16479.html

suyuwen1 2014-12-11

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400不一定是存在错误，可能是浏览器预加载造成，这篇文章测试了。 http://www.ihref.com/read-16479.html

尘雨 2012-05-12

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http协议里，我记得http header和body之间需要两个回车换行。

我是西瓜 2012-05-12

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[Quote=引用 3 楼的回复:]

"Cache-Control:no-cache\r\n\r\n" 增加一个回车换行试试看
"__VIEWSTATE=%2FwEPDwUKLTMyNDcxODYzNQ9kFgICAw9kFgICAw8PFgIeBFRleHQFATJkZGSwHfmZ0K4tQfRw3xFfLisrdyd0wg%3D%3D&__EVENTVALIDATION=%2FwEWAgKWw8aHBgKM54rGB……
[/Quote]
非常感谢，可为什么加个回车就行了呢。

尘雨 2012-05-12

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"Cache-Control:no-cache\r\n\r\n" 增加一个回车换行试试看
"__VIEWSTATE=%2FwEPDwUKLTMyNDcxODYzNQ9kFgICAw9kFgICAw8PFgIeBFRleHQFATJkZGSwHfmZ0K4tQfRw3xFfLisrdyd0wg%3D%3D&__EVENTVALIDATION=%2FwEWAgKWw8aHBgKM54rGBmWhGwUcHj2AyR2%2BpwXvfu0qkwRW&Button1=Button";

尘雨 2012-05-12