How to retrieve a file from Internet via HTTP?

Question

I want to download a file from Internet and InternetReadFile seem a good and easy solution at the first glance. Actually, too good to be true. Indeed, digging a bit I have s

Answer 1

I basically do the same as you do. For me it works fairly flawlessly.

The only differences between my code and your code is I have an INTERNET_FLAG_RELOAD parameter to force a download from the file and not the cache. You can try that and see if it works better:

  hURL := InternetOpenURL(hSession, PChar(fileURL), nil, 0, INTERNET_FLAG_RELOAD, 0) ; 

Also check for an internet connection before downloading. Do this:

  dwConnectionTypes := INTERNET_CONNECTION_MODEM
                 + INTERNET_CONNECTION_LAN
                 + INTERNET_CONNECTION_PROXY;
  InternetConnected := InternetGetConnectedState(@dwConnectionTypes, 0);
  if InternetConnected then ...