Re: Quick and easy way to prevent multiple votes?

I think it would be valuable to write all IPs to a file. Have a space separating the IP from the USER_AGENT on each line. Then suck each line into a regex like /(\S+)\s(.*)/ so that $1 has the IP and $2 is the rest of the info you'd want to store about each session. Make a hash $visitlog{$1}=$2 for each line. When you get a new submission, check

if (defined $visitlog{$newipadd}) {
  # maybe check $USER_AGENT && $othrsave stuff to examine
  # if anything further about unique proxy users can be determined
  #failure code && error mesg
} else {
  # maybe check $USER_AGENT && $othrsave stuff to further
  # determine if the user is attempting to revote.
  #process vote && success mesg
  $visitlog{$newipadd} = "$USER_AGENT" . $othrsave;
}
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Then before you end the script, overwrite your logfile with the current visitlog hash with each line containing "$key $value". This is how I'd probably do it. Hope it's helpful. I'd be glad to try to help more if you'd like any. TTFN & Shalom.

-PipTigger

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RE: Re: Quick and easy way to prevent multiple votes? by turnstep (Parson) on Jun 08, 2000 at 05:53 UTC
> Then suck each line into a regex like /(\S+)\s(.*)/ so that $1 has the > IP and $2 is the rest of the info you'd want to store... Quick note: For a large list like the one potentially generated by such a script, a regex will not be as efficient as a split.	[reply]
RE: RE: Re: Quick and easy way to prevent multiple votes? by PipTigger (Hermit) on Jun 08, 2000 at 13:13 UTC
I was under the impression that split employs regexes to do it's bidding and if no particular one is specified, it defaults to /\s+/. Maybe it also runs a =~ s/^\s+//; before matching the split field. I'm not sure about the underlying implementation but I thought one of my O'Reilly boox described split like this. Is that not the case? TTFN & Shalom. -PipTigger	[reply]