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import qualified Data.ByteString.Lazy.Char8 as L8 | |
import Network.HTTP.Client (defaultManagerSettings, newManager) | |
import Network.HTTP.Simple | |
import Network.HTTP.Client.TLS | |
import System.Directory | |
import qualified Data.Map as M | |
import Data.List (sortBy) | |
import Control.Monad | |
import Control.Applicative | |
import System.Environment | |
import System.IO | |
(isreading, readby) = (">", "<") | |
get_friends_resp user mg = do | |
let fname = "friends_" ++ user ++ ".txt" | |
cached <- doesFileExist fname | |
if cached then readFile fname | |
else do | |
let request = setRequestManager mg . parseRequest_ $ "https://www.livejournal.com/misc/fdata.bml?user="++user | |
body <- L8.unpack . getResponseBody <$> httpLBS request | |
writeFile fname body | |
return body | |
get_friends user marker mg = | |
map (drop 2) . filter ((== marker) . take 1) . lines <$> get_friends_resp user mg | |
process_friend mg n marker (mp, k) user = do | |
putStr $ "\r" ++ (show k) ++ "/" ++ (show n) | |
hFlush stdout | |
readers <- get_friends user marker mg | |
return $ (foldl (\m u -> M.insertWith (+) u 1 m) mp readers, k+1) | |
collect friends mg marker = do | |
(m,_) <- foldM (process_friend mg (length friends) marker) (M.empty, 1) friends | |
let lst = filter (\(u,k) -> k > 1) $ M.toList m | |
return $ map (\(u,k) -> (u,k, elem u friends)) $ sortBy (\(_,k1) (_,k2) -> compare k2 k1) lst | |
mkline include_friends (u,k,f) = | |
let line = (show k) ++ " <a href=\"https://" ++ u ++ ".livejournal.com\">" ++ u ++ "</a> " | |
in if include_friends | |
then line ++ (if f then "*" else "") ++ "<br>\n" | |
else if f then "" else line ++ "<br>\n" | |
get_cothinkers username = do | |
manager <- newManager tlsManagerSettings | |
friends <- get_friends username isreading manager | |
cothinkers <- concat . map (mkline False) <$> collect friends manager readby | |
influencers <- concat . map (mkline True) <$> collect friends manager isreading | |
let answer = "<table border=0 width=100%><tr><td valign=\"top\"><h3>Cothinkers</h3>" ++ | |
"<i>who read your friends</i><p>" ++ cothinkers ++ | |
"</td><td valign=\"top\"><h3>Influencers</h3> <i>who your friends read</i><p>" | |
++ influencers ++ "</td></tr></table>" | |
writeFile "cothinkers.html" answer | |
putStrLn "\ndone!\n" | |
main = do | |
args <- getArgs | |
case args of | |
[] -> putStrLn "usage: cothinkers username" | |
username : _ -> get_cothinkers username |
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