如何在vc中实现模拟一个web页面中form提交。

Question

如何在vc中实现模拟一个web页面中form提交。

Answer 1

MFC的：
void post()
{
    CInternetSession session("My Session");
    CHttpConnection* pServer = NULL;
    CHttpFile* pFile = NULL;
    CString ServerName = "webmail.21cn.com";
    INTERNET_PORT nPort = 80;
    DWORD retcode;
    char outBuff[300] = "LoginName=aaa&passwd=xxx&DomainName=21cn.com";//I have test this with my loginname and password
    try
    {
        pServer = session.GetHttpConnection(ServerName,nPort);
        pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,"/NULL/NULL/NULL/NULL/NULL/SignIn.gen",NULL,1,NULL,NULL,INTERNET_FLAG_EXISTING_CONNECT);
        pFile -> AddRequestHeaders("Content-Type: application/x-www-form-urlencoded");
        pFile -> AddRequestHeaders("Accept: */*");
        pFile -> SendRequest(NULL,0,outBuff,strlen(outBuff)+1);
        pFile -> QueryInfoStatusCode(retcode);
        // you can read from the file after this......I've just left it out.
        for(int i=0;i<10;i++)//read ten line of returned HTML,you need to edit this to use the result
        {
        CString smsg;
        pFile->ReadString(smsg);
        AfxMessageBox(smsg);
        }
DWORD dwlen=pFile->GetLength();
char buf[1024];
DWORD dwread=pFile->Read(buf,1024);
    }
    catch (CInternetException * e){};
    delete pFile;
    delete pServer;
    session.Close();
}

Answer 2

socket的：
///////////////////////////////////////////////////////////////////////////
//SDK post
///////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "winsock.h"
#pragma comment(lib,"ws2_32.lib")
#define winsock_version 0x0101
void main()
{
//I create  C:\Inetpub\wwwroot\test\test.asp ,start the web service
//start my program, the result is OK.
//If it works,it is written by masterz,otherwise I don't know who write it.
    SOCKADDR_IN saServer;
LPHOSTENT lphostent;
WSADATA wsadata;
    SOCKET hsocket;
int nRet;
const char* host_name="127.0.0.1";
char* req="POST /test/test.asp HTTP/1.0\r\n"
"From: local\r\n"
"User-Agent: post_test/1.0\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n"
"Content-Length: 20\r\n\r\n"
"type=12345&name=aaaa";
if(WSAStartup(winsock_version,&wsadata))
printf("can't initial socket");
    lphostent=gethostbyname(host_name);
    if(lphostent==NULL)
printf("lphostent is null");
hsocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    saServer.sin_family = AF_INET;
// Use def. now, need to handle general case
saServer.sin_port = htons(80);
saServer.sin_addr = *((LPIN_ADDR)*lphostent->h_addr_list);
    nRet = connect(hsocket, (LPSOCKADDR)&saServer, sizeof(SOCKADDR_IN));
if (nRet == SOCKET_ERROR)
{
printf("can't connect");
closesocket(hsocket);
return;
}
else
printf("connected with %s\n",host_name);
nRet = send(hsocket, req, strlen(req), 0);
if (nRet == SOCKET_ERROR)
{
printf("send() failed");
closesocket(hsocket);

}
else
printf("send() OK\n");
char dest[1000];
nRet=1;
while(nRet>0)
{
nRet=recv(hsocket,(LPSTR)dest,sizeof(dest),0);
if(nRet>0)
dest[nRet]=0;
else
dest[0]=0;
printf("\nReceived bytes:%d\n",nRet);
printf("Result:\n%s",dest);
}
}

Answer 3

WinInet APIstatic TCHAR hdrs[] = _T("Content-Type: application/x-www-form-urlencoded");
static TCHAR frmdata[] = _T("name=John+Doe&userid=hithere&other=P%26Q"); 
static TCHAR accept[] = _T("Accept: */*"); 
HINTERNET hSession = InternetOpen("MyAgent",INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0); 
HINTERNET hConnect = InternetConnect(hSession, _T("ServerNameHere"), INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1); 
HINTERNET hRequest = HttpOpenRequest(hConnect, "POST",_T"FormActionHere"), NULL, NULL, accept, 0, 1);
HttpSendRequest(hRequest, hdrs, strlen(hdrs), frmdata, strlen(frmdata));

Answer 4

brainholmes(我是大头蒜) 的回答真全面,佩服!

Answer 5

如果是GET方式，可以更简单
std::stringstream ss;
ss<<"http://127.0.0.1/xp_call_asp_by_onega.asp?table_name="<<szTable<<"&record_id="
<<record_id<<"&additional_info="
<<szAdditionalInfo;
LPCTSTR download_file_name = "c:\\xp_call_asp_by_onega.htm";
DeleteFile(download_file_name);
URLDownloadToFile(NULL,ss.str().c_str(),download_file_name,0,NULL);