In my experience, the conditions you're describing are mutually exclusive. Even requiring registration doesn't ensure that a person only answers a question once because they could create multiple accounts. It really comes down to balancing how important it is for a single answer for a single user. The more important that condition is, the more hoops you'll have to make the end-user jump through. A cookie can be deleted/rejected as you already have realized. This is also the situation where more than one user uses the same computer and browser, the second person would not be able to answer the question without clearing cookies.
On Wed, Jul 23, 2008 at 10:37 AM, Simon Bailey <[EMAIL PROTECTED]> wrote: > Hi, > > I have a simple scenario to tackle where a user hits a cfm page and has to > answer a question, the same user must not be able to repeat this process > though. (would like to avoid the user having to register any information > i.e. user name or email address etc for identification). > > I have tried IP checks but delving deeper resulted in a heap of problems > related to ensure I got the users local ip and not proxy, then > HTTP_X_FORWARDED_FOR is a no no ant REMOTE_ADDR returns the same ip on > different machines within a company network. > > I have also tried the storing a cookie on the users computer but obvious > problems occur there with browsers refusing cookies or deleting them. > > I finally tried ClientManagement using a database and enabling in CFAdmin, > but realised that this checks a users client variables in the database > against cookies which once again means failure. > > So, is there any methods to identify a user and reject them if they have > previously accessed that particular application, or accept and store that > they have visited if they have not accessed the application? > > Thanks in advance, Simon... > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:309527 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
