wince 中使用HttpSendRequest函数POST数据时应该注意的一点

测试用例代码
CString szHeaders;
szHeaders ="EmployeeID: "+UserID+"/r/n";
szHeaders+="EmployeePassword: "+Password+"";

// HTTPRequest Response;
// memset(&Response, NULL, sizeof(HTTPRequest));
// if (!MCHttp.SendRequestEx(m_VerbType, szURL, HTTP_VERSION_1_1, TEXT("*/*"), TEXT("PervasiveBiz"), szHeaders,
// szSendBuffer, 60000, &Response))
CString strServerName;
CString strObject;
INTERNET_PORT nPort;
DWORD dwServiceType;
if (!AfxParseURL(szURL, dwServiceType, strServerName, strObject, nPort) ||
dwServiceType != AFX_INET_SERVICE_HTTPS && dwServiceType != AFX_INET_SERVICE_HTTP)
{
return -2;
}
HINTERNET m_hOpen;
HINTERNET m_hConnect;
HINTERNET m_hRequest;
m_hOpen = InternetOpen(TEXT("PervasiveBiz"), INTERNET_OPEN_TYPE_DIRECT,NULL, 0, 0);
if (!m_hOpen)
{
return -1;
}

if (!(m_hConnect = InternetConnect(m_hOpen, strServerName, nPort, NULL, NULL, dwServiceType, 0, 0)))
{
InternetCloseHandle(m_hOpen);
return -1;
}

LPTSTR AcceptTypes[2] = {TEXT("*/*"), NULL};
DWORD dwFlags = INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_CACHE_WRITE;
// Open an HTTP request handle.
if (!(m_hRequest = HttpOpenRequest (m_hConnect, TEXT("POST"), strObject, HTTP_VERSION, NULL, (LPCTSTR*)AcceptTypes,
dwFlags, 0)))
{
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
return -1;
}

DWORD dwHttpTimeout = TIME_OUT;
if(!InternetSetOption(m_hRequest,INTERNET_OPTION_CONNECT_TIMEOUT,&dwHttpTimeout,sizeof(DWORD)))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
return -1;
}
if(!InternetSetOption(m_hRequest,INTERNET_OPTION_SEND_TIMEOUT,&dwHttpTimeout,sizeof(DWORD)))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
return -1;
}
if(!InternetSetOption(m_hRequest,INTERNET_OPTION_RECEIVE_TIMEOUT,&dwHttpTimeout,sizeof(DWORD)))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);;
return -1;
}
// MessageBox(NULL, szSendBuffer,szHeaders, 0);
////////////////////////////////////////////////重点要注意的地方，HttpSendRequest的第三个参数必须为多字节编码格式，否则服务器端会出错的。花了一天半的时间调试出来的结论。如果不进行转换，服务器端只会接收一半数据，后面的数据将会收不到。
byte* pszData = new byte[szSendBuffer.GetLength()];
char *pConten = new char[szSendBuffer.GetLength()];
memset(pszData,0,szSendBuffer.GetLength());
memset(pConten,0,szSendBuffer.GetLength());
WideCharToMultiByte( CP_ACP, 0, szSendBuffer.GetBuffer(0),
-1, pConten, szSendBuffer.GetLength(), NULL, NULL );
memcpy(pszData, pConten, szSendBuffer.GetLength());

int len = strlen((char*)pszData);
int len2 = szSendBuffer.GetLength();
//MessageBox(NULL, szSendBuffer, str);
if(HttpSendRequest(m_hRequest, szHeaders, szHeaders.GetLength(), pszData, szSendBuffer.GetLength())
== FALSE)
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
return -1;
}
DWORD dwSize;
HttpQueryInfo(m_hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwSize,NULL);
TCHAR* lpHeaders = new TCHAR [dwSize];
if (!HttpQueryInfo (m_hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, (LPVOID) lpHeaders, &dwSize, NULL))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}

// MessageBox(NULL, lpHeaders, _T("HttpQueryInfo"), 0);
TCHAR szHttpStatus[4] = {0};
memcpy(szHttpStatus,lpHeaders+wcslen(_T("HTTP/1.1 ")),3*sizeof(TCHAR));
int dwHttpStatus = 0;
dwHttpStatus =_wtoi(szHttpStatus);
if ((dwHttpStatus<200)||(dwHttpStatus>300))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}
if(!InternetReadFile (m_hRequest, (LPVOID)(cResponse),32*1024, &dwSize))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}
if(dwSize == 0)
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}

HttpQueryInfo(m_hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwSize,NULL);
if (!HttpQueryInfo (m_hRequest, HTTP_QUERY_RAW_HEADERS_CRLF,
(LPVOID) lpHeaders, &dwSize, NULL))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}

memcpy(szHttpStatus,lpHeaders+wcslen(_T("HTTP/1.1 ")),3*sizeof(TCHAR));
dwHttpStatus = _wtoi(szHttpStatus);
if ((dwHttpStatus<200)||(dwHttpStatus>300))
{
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
delete[] lpHeaders;
return -1;
}
// MessageBox(NULL, lpHeaders, _T("lpHeaders"), 0);
delete[] lpHeaders;
InternetCloseHandle(m_hRequest);
InternetCloseHandle(m_hConnect);
InternetCloseHandle(m_hOpen);
return SENDDATA_SCUCCEED ;