[racket] Client-side cookies

Hi All,

I'm trying to re-write some Common Lisp web-scraping code in Racket.

In Common Lisp, I'm POSTing a login request, and storing the cookie-jar
for subsequent GETs:

(defun login (username password)
  "Logs in to www.example.com.  Returns a cookie-jar containing
  authentication details."
  (let ((cookie-jar (make-instance 'drakma:cookie-jar)))
    (drakma:http-request "http://www.example.com/login"
             :method :post
             :parameters `(("username" . ,username) ("password" .
             ,password))
             :cookie-jar cookie-jar)
    cookie-jar))

; snip

(defun get-page (page-num cookie-jar)
  "Downloads a potentially invalid HTML page containing data to scrape. 
  Returns a string containing the HTML."
  (let ((url (concatenate 'string "http://www.example.com/data/"
  (write-to-string page-num))))
    (let ((body (drakma:http-request url :cookie-jar cookie-jar)))
      (if (search "No data found." body)
    nil
  body))))

However, I can't find an equivalent in Racket. The latest HTTP
library[1] makes no mention of cookies at all, and AFAICT the cookie
library[2] seems more about correctly serializing and deserializing
them.

Can anyone suggest a way of re-writing the above CL in Racket without
having to implement a bunch of header-parsing stuff?

TIA for any help ...

[1]
https://github.com/plt/racket/blob/master/racket/collects/net/http-client.rkt
[2] http://docs.racket-lang.org/net/cookie.html

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Duncan Bayne
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