[racket] Client-side cookies

 I'm making fully RFC6265 compliant cookie support for net/url and http.
https://github.com/Kalimehtar/client-cookies

It is still pre-alpha, but, I hope, will be ready in 2-3 weeks.


Среда,  8 января 2014, 10:33 -07:00 от Matthew Flatt <mflatt at cs.utah.edu>:
>In case no one offers a better library, enclosed is a small one that I
>recently created for a web-scraping task.
>
>Start a simulation of a browser with `make-connection`, use `goto!` to
>follow a link to a relative URL (following redirects), and use `back!`
>to go back. The `goto!` function returns two values: the headers as a
>string and the page content as bytes.
>
>Beware: My application accessed a single site, so this library doesn't
>attempt to do the right thing with cookies across sites.
>
>At Wed, 08 Jan 2014 03:48:44 -0800, Duncan Bayne wrote:
>> 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
>> 
>> -- 
>> Duncan Bayne
>> ph: +61 420817082 | web:  http://duncan-bayne.github.com/ | skype:
>> duncan_bayne
>> 
>> I usually check my mail every 24 - 48 hours.  If there's something
>> urgent going on, please send me an SMS or call me.
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-- 
Roman Klochkov
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