求助大神，Multipart/form-data POST文件上传格式如何设置？？？

[SureGOGOGO]

应朋友要求做个上传的功能，是网上找来的自己修改的一个函数，但是没办法上传到服务器？求解？？？
是Multipart/form-data POST文件上传格式错误了吗？如果知道的，请高抬贵手写一下详细的格式每一处的换行都打上换行符。。代码如下：能复制到编译器直接运行的了。

bool PostHttpPage(const std::string& hostName, const std::string& pathName) 
{ 
	using namespace std;   
	CInternetSession session("PostFile");  
	CFile f;
	void *pBuffer=NULL;
	try 
	{ 
		INTERNET_PORT nPort = 80; 
		DWORD dwRet = 0;   
		CHttpConnection* pServer = session.GetHttpConnection(hostName.c_str(), nPort); //跟服务器连接,指定80端口

		CHttpFile* pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_POST, pathName.c_str());  //post方式打开请求
		CString HeadPost("Content-Type:multipart/form-data;boundary=ZnAAAAAAAAAAGpDtePMx0KrHh_G0X99Yef9r8JZsRJSXC\r\n");
	
		CString FilePost("Content-Disposition: form-data;name=\"test.jpg\"; filename=\"C:\\test.jpg\"\r\n\r\n");
		FilePost+="Content-Type: image/pjpeg\r\n";
		FilePost+="Content-Transfer-Encoding:binary\r\n";

		pFile->AddRequestHeaders(HeadPost); //增加到请求头

		CString PreBoundaryPost("--ZnAAAAAAAAAAGpDtePMx0KrHh_G0X99Yef9r8JZsRJSXC\r\n");
		CString LastBoundaryPost("--ZnAAAAAAAAAAGpDtePMx0KrHh_G0X99Yef9r8JZsRJSXC--\r\n");


		//读取文件
		if (FALSE == f.Open("C:\\test.jpg", CFile::modeRead | CFile::shareDenyNone))
		{
			MessageBox(NULL,"Unable to open the file.","Text",MB_OK);
			return FALSE;
		}
		int gloLen=HeadPost.GetLength()+PreBoundaryPost.GetLength()+FilePost.GetLength()+f.GetLength()+LastBoundaryPost.GetLength();
		pFile->SendRequestEx(gloLen,HSR_SYNC | HSR_INITIATE); //发送数据的大小
        CFile f1;
		f1.Open("C:\\2.dat",CFile::modeCreate |CFile::modeWrite);

		f1.Write(HeadPost,HeadPost.GetLength());
		pFile->Write((LPSTR)(LPCSTR)HeadPost,HeadPost.GetLength()); //写入请求头,包括boundary的格式

		f1.Write(PreBoundaryPost,PreBoundaryPost.GetLength());
		pFile->Write((LPSTR)(LPCSTR)PreBoundaryPost,PreBoundaryPost.GetLength()); //写入前边界
		f1.Write(FilePost,FilePost.GetLength());
		pFile->Write((LPSTR)(LPCSTR)FilePost,FilePost.GetLength()); //写入文件信息
        
		//写入文件内容
		DWORD dwReadLength = -1;
        pBuffer=malloc(64*10240);
		while (0 != dwReadLength)
		{
			dwReadLength = f.Read(pBuffer, f.GetLength());
			if (0 != dwReadLength)
			{
		      
				pFile->Write(pBuffer, dwReadLength);
				
			}
		}

		f1.Write(pBuffer, f.GetLength());
	
		pFile->Write((LPSTR)(LPCSTR)LastBoundaryPost,LastBoundaryPost.GetLength()); //写入后边界
        f1.Write(LastBoundaryPost,LastBoundaryPost.GetLength());

		f1.Close();
		pFile->EndRequest(HSR_SYNC);

		DWORD dwResponseLength = pFile->GetLength();
		LPSTR szResponse=NULL;
		CString strResponse("");

		while (0 != dwResponseLength)
		{
			szResponse = (LPSTR)malloc(dwResponseLength + 1);
			szResponse[dwResponseLength] = '\0';
			pFile->Read(szResponse, dwResponseLength);
			strResponse += szResponse;
			free(szResponse);
			dwResponseLength = pFile->GetLength();
		}
		MessageBox(NULL,strResponse,"网页应答数据",MB_OK);

	 
	}

	catch (CInternetException* pEx) 
	{ 
		f.Close();
		//catch errors from WinInet 
		TCHAR pszError[200]; 
		pEx->GetErrorMessage(pszError,200);  
		std::cout<<pszError<<std::endl;//显示异常信息 
		if(pBuffer!=NULL)
		free(pBuffer);
		return false; 
	} 
	session.Close();
	f.Close();
	if(pBuffer!=NULL)
		free(pBuffer);
	return true; 
}