What is a Token Data String and how do I create one?

How do I create local server scripts? I have read Chapter 2, what is a data string, how do I 'create' one and how can I 'pass' this off Apple, iTunes, whoever needs it? Chapter 2 doesn't say.
Gateway   Windows XP Pro   Military

I suggest that you grab a copy of Chapter 4 of the Admin document. It explains a lot. You should also grab a copy of Apple's sample scripts (you get some C code, Java, Perl, Python, and a shell script). They will give you some idea of how this works. The scripts are downloadable frmo the iTunes U support page.
Basically, the token string contains a credential that says what access you'd like to have in iTunes U (you are an "Admin" user or a "Student" or an "Instructor" say). The credential encodes what you can view/edit in a standard way. The credential also includes some optional info (like your identity, e-mail address ... a "user identifier" which is typically a number ... say if you identify users by numbers and names ... and other stuff). You then slap on a timestamp on the credential and cryptographically encode it with that shared secret Apple sent you (when I say "you," I mean that funky CGI you've written ... your CGI does all the encoding). When you're done with the token string, you slap it on the end of a site URL (again, this is something Apple sent you) and send it to Apple. This way, you ('er, your CGI) does all the authentication for Apple (because you know how to authenticate your users better than Apple ever will).
I confess I had to read Apple's documents, oh, like twenty times before I figured all this stuff out. Once you get it though, it will seem like a pretty cool system.
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