2011/5/18 J G Cho <g...@fundingmatters.com>:
> Ha! All the error messages did seemed to end in blahblah=.
>
> (I am going to blame the cold I am recovering from for making me think
> that somehow {key:val} was used. Either that or I've been using too
> much JSON and forgot some things predate JSON like cookies and s-exp.)
>
> I have a question about the substring logic. It does not seem to look
> for = or \n but chops off the last 3. Am I to infer that that is the
> case for all the outcome of (bytes->string/utf-8 (base64-encode
> (HMAC-SHA1 ....?Yup > > And thank you for your keen diagnosis as usual. And for the code as > well. (Note to self: So that's what professional code looks like? I > got a long way to go.) > > jGc > > On Wed, May 18, 2011 at 1:57 PM, Jay McCarthy <jay.mccar...@gmail.com> wrote: >> That's exactly the problem. >> >> Here's a fairly re-usable identifying cookie: >> >> https://github.com/jeapostrophe/m8b/blob/master/id-cookie.rkt >> >> Notice at the top I just get the substring of the BASE64. >> >> Jay >> >> 2011/5/18 Neil Van Dyke <n...@neilvandyke.org>: >>> J G Cho wrote at 05/18/2011 04:23 AM: >>>> >>>> (define (make-digest s1 s2) >>>> (bytes->string/utf-8 >>>> (base64-encode >>>> (HMAC-SHA1 (string->bytes/utf-8 s1) >>>> (string->bytes/utf-8 s2))))) >>>> >>>> I then use it to make a cookie like: >>>> >>>> (define digest >>>> (make-digest "saltycracker" (string-append "time" time "id" "joseph"))) >>>> >>>> (define digest-cookie >>>> (make-cookie "digest" digest)) >>>> >>>> Writing it out seems to go okay but when I try to read it back, I am >>>> greeted with: >>>> >>>> lexer: No match found in input starting with: >>>> "WFs1fa0jLTOXqiLG08EtBq1wNYI= >>>> >>> >>> Is the problem that the BASE64 output contains "=" and newline characters, >>> and that's getting into the HTTP header verbatim? >>> >>> If that's the problem, then probably you want to trim the "=" and newline >>> characters from the string. (You could re-encode, but that would be >>> redundant, since the purpose of BASE64 is to encode bytes safely for >>> transport.) >>> >>> -- >>> http://www.neilvandyke.org/ >>> _________________________________________________ >>> For list-related administrative tasks: >>> http://lists.racket-lang.org/listinfo/users >>> >> >> >> >> -- >> Jay McCarthy <j...@cs.byu.edu> >> Assistant Professor / Brigham Young University >> http://faculty.cs.byu.edu/~jay >> >> "The glory of God is Intelligence" - D&C 93 >> > -- Jay McCarthy <j...@cs.byu.edu> Assistant Professor / Brigham Young University http://faculty.cs.byu.edu/~jay "The glory of God is Intelligence" - D&C 93 _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
