用wininet下载网页的charset的问题

Question

比如: http://www.google.cn/
用firefox查看源文件: charset=UTF-8
我用wininet的函数下载后, 源文件中charset变成了charset=GB2312 (vc程序是Use Unicode Character Set). 如何让他都以UTF-8的形式直接传输过来?
是不是要加什么header在httpsendrequest里??谢谢!

Answer 1

     //GB2312 转为 UTF-8
     void CChineseCodeLib::GB2312ToUTF_8(string& pOut,char *pText, int pLen)
     {
           char buf[4];
           char* rst = new char[pLen + (pLen >> 2) + 2];
           
           memset(buf,0,4);
           memset(rst,0,pLen + (pLen >> 2) + 2);
           
           int i = 0;
           int j = 0;      
           while(i < pLen)
           {
                   //如果是英文直接复制就可以
                   if( *(pText + i) >= 0)
                   {
                           rst[j++] = pText[i++];
                   }
                   else
                   {
                           WCHAR pbuffer;
                           Gb2312ToUnicode(&pbuffer,pText+i);
                           
                           UnicodeToUTF_8(buf,&pbuffer);
                           
                           unsigned short int tmp = 0;
                           tmp = rst[j] = buf[0];
                           tmp = rst[j+1] = buf[1];
                           tmp = rst[j+2] = buf[2];
                           
                           
                           j += 3;
                           i += 2;
                   }
           }
           rst[j] = '\0';
   
           //返回结果
           pOut = rst;             
           delete []rst;   
           
           return;
     }