vc中如何用post方法提交表单

在vc中如何用post方法提交表单！

我这里有一段程序，用来在一个对话框里显示出一次http request的原始信息，不过使用Inet API做的，希望能有帮助。

void CHTTPRequestDlg::OnButtonRequest()
{
UpdateData(TRUE);
HINTERNET hInternet = InternetOpen(“Mozilla/4.0 (compatible; MSIE 5.0; Windows NT 5.0)”, INTERNET_OPEN_TYPE_DIRECT,
NULL, NULL, NULL);
HINTERNET hSession = InternetConnect(hInternet, m_strHost,
m_nPort, “username”, “password”,
INTERNET_SERVICE_HTTP, 0, 0);
char* szAccept[] = {“*/*”, NULL};
CString strVerb;
m_comboVerb.GetWindowText(strVerb);
HINTERNET hRequest = HttpOpenRequest(hSession, strVerb, m_strObject, NULL, NULL, (LPCSTR*)szAccept, 0, 0);
struct
{
char* Language;
char* Encoding;
char* ContentType;
}Headers = {“Accept-Language: zh-cn\r\n”,
“Accept-Encoding: gzip, deflate\r\n”,
“Content-Type: application/x-www-form-urlencoded\r\n”};

if(m_bLanguage)
HttpAddRequestHeaders(hRequest, Headers.Language, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
if(m_bEncoding)
HttpAddRequestHeaders(hRequest, Headers.Encoding, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
if(m_bContentType)
HttpAddRequestHeaders(hRequest, Headers.ContentType, -1, HTTP_ADDREQ_FLAG_ADD|HTTP_ADDREQ_FLAG_REPLACE);
LPCSTR lpAddHeader = NULL, lpContent = NULL;
if(m_strHeaders.GetLength())
{
if(m_strHeaders.Right(2) != “\r\n”)
m_strHeaders += “\r\n”;
lpAddHeader = (LPCSTR)m_strHeaders;
}
if(m_strContent.GetLength() && (strVerb == “POST” || strVerb == “PUT”))
lpContent = (LPCSTR)m_strContent;
HttpSendRequest(hRequest, lpAddHeader, -1, (LPVOID)lpContent, m_strContent.GetLength());

m_editContentGot.SetSel(0, -1);
m_editContentGot.ReplaceSel(“”);


LPSTR lpszData; // buffer for the data
DWORD dwSize; // size of the data available
DWORD dwDownloaded; // size of the downloaded data

// Set the cursor to an hourglass.
SetCursor(LoadCursor(NULL,IDC_WAIT));

// This loop handles reading the data.
while(1)
{
// The call to InternetQueryDataAvailable determines the amount of
// data available to download.
if (!InternetQueryDataAvailable(hRequest,&dwSize,0,0))
{
SetCursor(LoadCursor(NULL,IDC_ARROW));
break;
}
else
{
// Allocates a buffer of the size returned by InternetQueryDataAvailable
lpszData = new char[dwSize+1];

// Reads the data from the HINTERNET handle.
if(!InternetReadFile(hRequest,(LPVOID)lpszData,dwSize,&d wDownloaded))
{
delete[] lpszData;
break;
}
else
{
// Adds a null terminator to the end of the data buffer
lpszData[dwDownloaded]=’\0′;

int nLen = m_editContentGot.GetWindowTextLength();
m_editContentGot.SetSel(nLen-1, nLen-1);
m_editContentGot.ReplaceSel(lpszData);

// Delete the two buffers
delete[] lpszData;

// Check the size of the remaining data. If it is zero, break.
if (dwDownloaded == 0)
break;
}
}
}

// Close the HINTERNET handle
InternetCloseHandle(hRequest);
InternetCloseHandle(hSession);
InternetCloseHandle(hInternet);

// Set the cursor back to an arrow
SetCursor(LoadCursor(NULL,IDC_ARROW));



使用MFC示例如下:
首先设置m_strRequest请求字符串 eg.”name=aaa&pass=bbb”;
m_strServerName 服务器名称或者IP eg.”www.yahoo.com”
m_strObjectName 请求文件位置 eg. “pub/aaa.asp”
请求的结果存放在m_strHtml中
func(){
CInternetSession m_InetSession(“session”);
CHttpConnection* pServer = NULL;
CHttpFile* pFile = NULL;
try{
INTERNET_PORT nPort;
nPort=80;
pServer = m_InetSession.GetHttpConnection(m_strServerName, nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST,
m_strObjectName);
char szHeaders[100];
strcpy(szHeaders,”Accept: text*/*\r\nContent-Type: application/x-www-form-urlencoded”);
pFile->AddRequestHeaders(szHeaders);


pFile->SendRequestEx(m_strRequest.GetLength());
pFile->WriteString(m_strRequest); //重要–>m_Request 中有”name=aaa&name2=BBB&…”
pFile->EndRequest();
DWORD dwRet;
pFile->QueryInfoStatusCode(dwRet);
CString str;

m_Mutex.Lock();
m_strHtml=”";
char szBuff[1024];
if (dwRet == HTTP_STATUS_OK){
UINT nRead;
while ((nRead = pFile->Read(szBuff,1023))>0)
{
m_strHtml+=CString(szBuff,nRead);
}
}
m_Mutex.Unlock();

delete pFile;
delete pServer;
}
catch (CInternetException* e){
CString s;
s.Format(“Internet Exception\r\nm_dwError%u,m_dwContextError%u”,e->m_dwError ,e->m_dwContext);
AfxMessageBox(s);
//catch errors from WinInet
}
}