I am building an eMail unsubscribe function, and I thought it would be a good
idea to encrypt the eMail address. In the email, I set the unsubscribe link to:
unsubscribe.cfm?id= l5N6axdBQlGDpyAklnmkjP+mfaauBKvfS9G9RzUQRJI=
But, this string isn’t URLEncoded, so I encoded it like this:
unsubscribe.cfm?id=l5N6axdBQlGDpyAklnmkjP%2BmfaauBKvfS9G9RzUQRJI%3D
But, I’ve still got a problem because when I URLDecode the parameter, it alters
the string.
Instead of: l5N6axdBQlGDpyAklnmkjP+mfaauBKvfS9G9RzUQRJI=
I get: l5N6axdBQlGDpyAklnmkjP mfaauBKvfS9G9RzUQRJI=
It’s changing the “+” to a space. As a result, my decrypt fails.
My question is: What’s the best way to generally handle this requirement? I
know I could just replace the space with a “+”, but I’m expecting there may be
other characters that don’t get handled correctly. And, I don’t want to get a
bunch of unexpected errors.
I’m using ColdFusion 8 and doing the encrypt like this: encrypt(ARGUMENTS.data,
variables.theKey, "DESEDE", "Base64")
Is there a better encryption or encoding to use? Or, is there a better way to
use URLEncode and URLDecode?
Thanks for any ideas!
Clarke
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