I know programs to check file hash like HashCalc etc. I can check the hash after I download the file. Is there any programs to check hash from server before I download it? I mean, if I got a download link, could I check the file hash before I download, or is it maybe impossible as the server don't provide it?
It's technicaly possible but then the hash calc tool has to run on the server and that gives a lot of server load, so no it's not possible. I like the principle however, check hash the first time a file comes on the server and keep it until the file gets changed. This way users can always check hashes from every file (even html files). But it's indeed not possible except if you can install such a ting on the server.
This is how i do it on sites... once a file (i am not talking big iso's here) is uploaded calculate hash, store in database so uploader/downloader can verify checksums
Thanks for the reply everyone.. Seems like hash check only possible on server side. I thought it will be alot easier to find mirrors for files with hash check rather than file names.. now I know its not possible.. thanks again for the info.
maybe there's a way to get a aproximative hash if we download the first and last mb of the file, of course it would not be the full hash but still could be usefull no?
I just ROFL'd. I know it might seem sensible to you vartaxe, but that's one of the funniest things I've heard from a n00b in a long time. The hash of one file and another that differ by *one bit* are completely different, that's basically the whole point of hashes.
When you don't have a hash on the website, the only way to be sure there had not been corruption during data transfer and storage process is to download the files 2 times and compare them, I would advise you to use HashTab instead of HashCalc, it integrates in windows explorer file's properties pane.