Rumor has it that geon may have mentioned these words: >Øyvind napsal(a): > > >Hello. > > > >I have created a program that automatically downloads some files I need. > >It can be .zip, .jpg, .mpg or .txt. However, a lot of the time urlretrieve > >downloads the file, gives no error, but the downloaded file is corrupted. > >I use a simple check for the size of the file. If it is way too small, I > >automatically remove it. > > > >remove it and try to download it again, lets say , 3times until you get >correct copy...
Or, depending on it's extension, try to open the newly downloaded file with the corresponding Python extension, i.e. (.jpg|.gif|.png) try to open with PIL[1], .zip files with the python zipfile module, etc. I *think* there's modules for .mpgs and maybe .avi's... but .txt files might be tough to authenticate, as there's no actual 'file format.' This python pseudocode might explain more: =-=-=-=-=-=-= snip here =-=-=-=-=-=-= def openzip(filename): import zipfile try: filebuf = zipfile.open(filename) except: return "Error 99: cannot open file; corrupted zipfile." filebuf.close() return None if __name__ == '__main__': if filename[:-4] == '.zip': retcode = openzip(filename) if retcode != None: print "Corrupt File - Try to download again!" =-=-=-=-=-=-= snip here =-=-=-=-=-=-= Just put an 'openzip' or 'openjpg' type of function for each type of file you'll need to authenticate. [[ This code will *not* run -- it certainly won't run in Eudora (where it's being typed), so it's only for showing the general idea... YMMV, UAYOR, etc. ;-) ]] Hope this helps, Roger "Merch" Merchberger [1] PIL == Python Image Library; it will open almost any type of static graphic image available. -- Roger "Merch" Merchberger | "Bugs of a feather flock together." sysadmin, Iceberg Computers | Russell Nelson [EMAIL PROTECTED] | _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor