retrieving the values from responseCookieJar

Question

Here is how I am sending a get request:

import Network.HTTP.Conduit
import Control.Applicative ((<$>))
import Network.HTTP.Types

request <- parseUrl $ "someUrl"
res <- withManager $ httpLbs request
putStrLn $ show $ responseCookieJar res

Instead of printing responseCookieJar I want to get a value from it. This http://hackage.haskell.org/package/http-conduit-2.1.2/docs/Network-HTTP-Conduit.html#t:CookieJar implies that it's not possible. So I figure I have to parse (by regexp) it as a string. But there must a standard way like getting a value by its key.

Isn't there?

I've rolled back the update as it's a completely different question and the answer doesn't really fit with the answer to the existing question. (It's a pretty basic problem with precedence, so just try putting in more brackets before actually asking the question) — Ganesh Sittampalam, Jul 06 '14 at 12:57
Please don't keep moving the goalposts for people who answer your questions. — Flexo, Jul 06 '14 at 23:29

Ganesh Sittampalam · Answer 1 · 2014-07-06T13:03:20.690

3

You can use destroyCookieJar to turn it into a list of Cookies, which you can then inspect via various field accessors.

The two most useful for keys are probably cookie_name and cookie_path. So you might do something like

filter (\c -> cookie_name c == pack "foo") . destroyCookieJar

(using pack from Data.Bytestring.Char8)

Or if there are a lot of cookies and you want to do multiple queries, you may want to build something like a Map from name to cookie first.

edited Jul 06 '14 at 13:03

answered Jul 06 '14 at 12:27

Ganesh Sittampalam

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Haha, we had two nearly identical answers within seconds of each other. +1 – huon Jul 06 '14 at 12:36
Your update is a separate problem, so it should be a separate question. – Ganesh Sittampalam Jul 06 '14 at 12:52
I believe you'll need to `ByteString.pack "foo"` or enable `OverloadedStrings` to do the `== "foo"` comparison. – huon Jul 06 '14 at 12:57
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(Why did this get downvoted? and, why was *my* answer accepted (this one is better)?) – huon Jul 06 '14 at 13:05
@dbaupp because I desire so. – Incerteza Jul 06 '14 at 13:13

score 3 · Accepted Answer · answered Jul 06 '14 at 12:27

3

You can call destroyCookieJar to break it into the individual Cookies, and then search that list.

answered Jul 06 '14 at 12:27

huon

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thanks, but I still can't achieve what I wanted, could take a look? – Incerteza Jul 06 '14 at 12:52

retrieving the values from responseCookieJar

2 Answers2