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Any way to change behavior depending on if this site has been here in X secs


jcpunk

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I have a form mail system setup internally.  It is as locked down as I can make it (only access is from inside, only able to email certain individuals, and a captacha).  Users are complaining about the captacha.  In the past we had a very smart spam bot infecting a computer that used the system to send spam.  I intend not to be a spam gateway.

 

So, is there any way (non session and non database) to say "Hey this user has visited this site within 300 seconds of their last visit, I wonder if they are a spam bot?  Lets toss the captcha out there to find out."

 

I cannot do session based stuff, because bots generally don't honor session cookies and that is what I am trying to prevent from using this.  I don't want to put together a database because then I have to clean out old rows after my window expires.

 

I am totally out of ideas on this one.... anybody got one?

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