There are many solution: You can use tools like wget or curl,

or use perl module LWP to build an agent en call it from cron.

I think the simpliest solution is to use wget :
http://www.gnu.org/software/wget/wget.html

In reply to Re: Sending a http request from a cron script by Frantz
in thread Sending a http request from a cron script by webchalkboard

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