URL

Question

hey,

I need to find out if an url is valid, using c++ (VC++ 2008 express). Though I looked at other forums, but they didn't offer the solution to me. I tried to use InternetConnect function, but in on or another way, that one always returns a handel if you put in a url which doesnt even exist...

And I do not like to use 3rd party libraries. Maybe sb knows a method by using the urlmon library/header???

THanks a lot

Answer 1

Can you please define valid. Do you mean a valid syntax or the URL must exist.

Answer 2

well, both of them. because I am programming a window which checks certain data on the net, so I need an existing url, and it needs to check if some urls do exist in real.

Answer 3

Try using the InternetOpenUrl(), as in:

HINTERNET hSession = InternetOpen (L"Is URL Valid", 0, NULL, NULL, 0);
HINTERNET hOpenUrl = InternetOpenUrl (hSession, 
          L"http://social.msdn.microsoft.com/Forums/en/vcgeneral/threads", NULL, 0, 1, 1);
if (hOpenUrl == NULL)
{
     // this is an invalid URL
}
InternetCloseHandle(hOpenUrl);
InternetCloseHandle(hSession);

I haven't executed the snippet myself, but check and let me know if it works!

Answer 4

well I got some strange results:

It said http://www.google.com doesnt exists. Also, I had to se the flag to working asynchronously, else my app would crash.

I didnt work...maybe you have a solution?

Answer 5

Well, you must have typed something other that what I showed you. I tested my code and it worked perfectly fine first try.

Please post your code. It must be different from mine.

Answer 6

OK, I did change some variables name, I didnt gave it a handle (so instead of HINTERNET I just direclty compared it in the if clause)

If you say it works, I'll literally copy that.

Answer 7

I see the error I made.

Just a question:

why did you put in 1 as a paramater in OpenUrl???Why?

Answer 8

HINTERNET Url=InternetOpenUrl(Inet,"https://d/asdk",NULL,0,1,1);
  if (Url==NULL)
   game.update=true;
  else
   game.update=false;
  InternetCloseHandle(Url);

This is my code. It seems that with every string it says it exists////