c++ Get方式获取页面源码(unicode编码)。

CString CHttpClient::doGet(CString href) 
{ 
    std::string httpsource;
    CInternetSession session1(NULL,0); 
    CHttpFile* pHTTPFile=NULL; 

    try{ 
        pHTTPFile=(CHttpFile*)session1.OpenURL(href); 
    }catch(CInternetException* m_pException){ 
        //捕捉错误，否则在网络断开时连接导致内存问题
        pHTTPFile=NULL; 
        m_pException->m_dwError;
        m_pException->Delete();
        session1.Close(); 
        return _T("");
    } 
    if(pHTTPFile) 
    {
        char sRecived[2048]={0};//初始化，避免内存问题

        pHTTPFile->ReadString((LPTSTR)sRecived,1024);//避免使用CString导致乱码，unicode编码时一个字符用两个字节来编码，第二个参数使用字符数
        do
        {
            httpsource+=sRecived;
            memset(sRecived,0,2048);
            //httpsource.append(sRecived);
        } while (pHTTPFile->ReadString((LPTSTR)sRecived,1024)>0);
        pHTTPFile->Close(); 
        delete pHTTPFile; 
        delete[] sRecived;
    } 
    session1.Close();
    wstring result=UTF8ToUnicode(httpsource);//转码
    return result.c_str();
} 

std::string CHttpClient::UnicodeToUTF8( const std::wstring& str )
{
 char*     pElementText;
 int    iTextLen;
 // wide char to multi char
 iTextLen = WideCharToMultiByte( CP_UTF8,
         0,
         str.c_str(),
         -1,
         NULL,
         0,
         NULL,
         NULL );
 pElementText = new char[iTextLen + 1];
 memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );
 ::WideCharToMultiByte( CP_UTF8,
         0,
         str.c_str(),
         -1,
         pElementText,
         iTextLen,
         NULL,
         NULL );
 std::string strText;
 strText = pElementText;
 delete[] pElementText;
 return strText;
}

wstring CHttpClient::UTF8ToUnicode( const string& str )
{
	int  len = 0;
	len = str.length();
	int  unicodeLen = ::MultiByteToWideChar( CP_UTF8,
		0,
		str.c_str(),
		-1,
		NULL,
		0 ); 
	wchar_t *  pUnicode; 
	pUnicode = new  wchar_t[unicodeLen+1]; 
	memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t)); 
	::MultiByteToWideChar( CP_UTF8,
		0,
		str.c_str(),
		-1,
		(LPWSTR)pUnicode,
		unicodeLen ); 
	wstring  rt; 
	rt = ( wchar_t* )pUnicode;
	delete  pUnicode;
	return  rt; 
}