Here is an example script showing how to create and use cookies:
#!/bin/sh
string=? ; exec /usr/local/plt/bin/mzscheme -r $0 "$@"
(read-case-sensitive #t)
(current-library-collection-paths
(cons "/home/kfisler/CS2135/collects/"
(current-library-collection-paths)))
(require-library "cgi.ss" "2135net")
(let ([bindings (append (get-bindings) (get-cookies))])
(generate-html-output/cookies
"Dummy Routes"
(list (make-cookie "origin" "boston" "Wednesday, 3-Oct-01 23:12:40 GMT" "/~kfisler/" #f #f))
(list
(format "You want to leave from ~a ~n"
(extract-first-binding 'origin bindings)))
))
To get the cookies support, you must include the lines from read-case-sensitive through require-library at the top of your script.
In this version, we call generate-html-output/cookies to create the HTML output. This takes an extra argument over the generate-html-output used in the sample solution. That extra argument (the second) is a list of cookies that should be stored when the script is run.
Here is the data definition for cookies:
A cookie is a
(make-cookie string string (string or #f) (string or #f)
(string or #f) boolean)
(define-struct cookie (name value expires path domain secure))
;; Constraints: * name must not contain the characters '=' or ';'
;; * value must not contain the character ';'
;; * expires must be of the format
;; "Wdy, DD-Mon-YYYY HH:MM:SS GMT"
;; * path must not contain the character ';'
;; * domain must not contain the character ';'
See the cookies documentation linked to on the project page for a description of these fields.
The get-cookies function extracts all the bindings that came from cookies. Use extract-first-binding to extract the value that was stored with a cookie.