gistfile1.hs

{-
Module: urban.hs
Description: Grabs example sentences for a random term from Urban Dictionary
Copyright: June 18, 2014
License: MIT

Maintainer: aryeh.hillman@gmail.com
Stability: experimental
Portability: portable

Requests and follows the 302 redirect at http://www.urbandictionary.com/random.php,
thereby requesting a random Urban Dictionary Page. Parses the HTML using HXT and
searches for HTML elements with the class name "example". The text for each example
element is parsed, then lstrip and rstrip'ed to remove newline characters. Finally,
a list containing those example texts are returned.
-}

import Network.Browser
import Network.HTTP
import Text.XML.HXT.Core
import Data.List    
import Data.String.Utils -- from MissingH

main :: IO [String]
main = do
    (_, rsp) <- Network.Browser.browse $ do
                  setAllowRedirects True
                  request $ getRequest "http://www.urbandictionary.com/random.php"
    let htmlString = rspBody rsp
    let htmlDoc = readString [withParseHTML yes, withWarnings no] htmlString
    examples <- runX $ htmlDoc //> hasAttrValue "class" (isInfixOf "example") >>> getChildren >>> getText
    return $ map (lstrip.rstrip) examples