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Better function to download file through http

Posted on 2004-09-17
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Last Modified: 2013-11-20
I already had a function to download file from http server.
My question is, is this function (GetFile()) good enough or there are another functions that work better (in speed)?
If there are better function, I need it.

for information, my program will download about 1000 files (size: 5 kilobytes, each file)

bool CMyProject::GetFile(const char *url, const char *filename)
{
     #define HTTPBUFLEN    512 // Size of HTTP Buffer...
     char httpbuff[HTTPBUFLEN];
     TCHAR   szCause[255];
 
     TRY
     {
          CInternetSession mysession;
          CStdioFile *remotefile = mysession.OpenURL(url,1,INTERNET_FLAG_TRANSFER_BINARY|INTERNET_FLAG_RELOAD);
 
          CFile myfile(filename, CFile::modeCreate|CFile::modeWrite|CFile::typeBinary);
            int numbytes;
 
              while (numbytes = remotefile->Read(httpbuff, HTTPBUFLEN))
                     myfile.Write(httpbuff, numbytes);
             
              mysession.Close();
              myfile.Close();
     }
 
     CATCH_ALL(error)
     {
          error->GetErrorMessage(szCause,254,NULL);
              //Out(szCause);
              return false;
     }
     END_CATCH_ALL;
 
     return true;
}
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Question by:nk2003
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3 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 125 total points
ID: 12085932
What about

URLDownloadToFile ( NULL, "http://www.experts-exchange.com/thefile.zip", "c:\\somewhere\\thefile.zip", 0, NULL);

?

0
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 12086570
Speed - the slowest bit in this procedure is likely to be your internet connection.  Would another routine actually give you any improvement?
0
 

Author Comment

by:nk2003
ID: 12100244
Thanks jkr, URLDownloadToFile() is faster than my GetFile() function.
But I still don't know what's bad with my function......  Do you know why?

And one more question, how to input/set the proxy server?
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