Instead of cookies I'm thinking of using cfid/cftoken to maintain state
like so:

index.cfm/cfid/12345/cftoken/2234567/fuseaction/FooBlah.htm

I assume spiders will index pages and specify their URL including the
"cfid/12345/cftoken/2234567" part. Since a new CFID/CFTOKEN pair is
generated for each new visit, I assume this means each time a spider comes
to my site and indexes a page it will record a different URL for the same page.

To prevent multiple users (coming from the same search engine) from using
the same CFID/CFTOKEN pair, I plan to use app_globals.cfm to replace the
values of CFID/CFTOKEN in "cfid/12345/cftoken/2234567" in the URL if
HTTP_REFERER is not from my site by setting the new values of CFID/CFTOKEN
as follows:

CFID = CLIENT.CFID and CFTOKEN = CLIENT.CFTOKEN

in app_globals.cfm

Does this make any sense?   Do you see any problems?

best, paul

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