CFHTTP and web caching... will this work?

Instead using an FTP transfer to get an XML file off a remote web server I thought about using CFHTTP to get it.  I was then told, it may not be good because the my internet connection is running through caching servers.

Then I started to think, what if I added a random number in a URL parameter in my CFHTTP :

<cfhttp url=",999)##RandRange(1,999)##RandRange(1,999)#" method="get"...>

Will this defeat any caching issues?
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I don't want to say I am 100% sure that would work but it should. Its the same idea as we do to get around caching servers;  we append a page request id to all the URL's. From what I can tell it has worked.
additionally unless you are doing it more often than 1 second why not just use now() instead of random numbers.

<cfhttp url="" method="get"...>
P_CF_DEV is right, but, instead of using now() or a random number, I would suggest using getTickCount()... it's unique for every millisecond...

<cfhttp url="" method="get"...>



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all these will probably work for you or:
should work
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