module Web.VKHS.Client where
import Data.List
import Data.Maybe
import Data.Time
import Data.Either
import Control.Applicative
import Control.Arrow ((&&&),(***))
import Control.Monad
import Control.Monad.State
import Control.Monad.Cont
import Data.Default.Class
import qualified Data.CaseInsensitive as CI
import Data.Map (Map)
import qualified Data.Map as Map
import Data.List.Split
import Data.Text(Text)
import qualified Data.Text as Text
import Control.Concurrent (threadDelay)
import System.IO as IO
import System.IO.Unsafe as IO
import System.Clock as Clock
import Data.ByteString.Char8 (ByteString)
import qualified Data.ByteString.Char8 as BS
import Network.HTTP.Client ()
import Network.HTTP.Client.Internal (setUri)
import Network.HTTP.Client.TLS (tlsManagerSettings)
import qualified Network.HTTP.Types as Client
import qualified Network.HTTP.Client as Client
import qualified Network.HTTP.Client.Internal as Client
import qualified Network.URI as Client
import qualified Network.Shpider.Forms as Shpider
import Pipes.Prelude as PP (foldM)
import qualified Pipes as Pipes (Producer(..), for, runEffect, (>->))
import qualified Pipes.HTTP as Pipes hiding (Request, Response)
import qualified Text.Parsec as Parsec
import Debug.Trace
import Web.VKHS.Types
data Error = ErrorParseURL { euri :: String, emsg :: String }
| ErrorSetURL { eurl :: URL, emsg :: String }
deriving(Show, Eq)
data ClientState = ClientState {
cl_man :: Client.Manager
, cl_last_execute :: TimeSpec
, cl_minimum_interval_ns :: Integer
}
defaultState :: GenericOptions -> IO ClientState
defaultState GenericOptions{..} = do
cl_man <- Client.newManager
(Client.managerSetProxy (Client.proxyEnvironment Nothing)
(case o_use_https of
True -> tlsManagerSettings
False -> Client.defaultManagerSettings))
cl_last_execute <- pure (TimeSpec 0 0)
cl_minimum_interval_ns <- pure (round (10^9 / o_max_request_rate_per_sec))
return ClientState{..}
class ToClientState s where
toClientState :: s -> ClientState
modifyClientState :: (ClientState -> ClientState) -> (s -> s)
class (MonadIO m, MonadState s m, ToClientState s) => MonadClient m s | m -> s
newtype URL_Protocol = URL_Protocol { urlproto :: String }
deriving(Show)
newtype URL_Query = URL_Query { urlq :: String }
deriving(Show)
newtype URL_Host = URL_Host { urlh :: String }
deriving(Show)
newtype URL_Port = URL_Port { urlp :: String }
deriving(Show)
newtype URL_Path = URL_Path { urlpath :: String }
deriving(Show)
newtype URL = URL { uri :: Client.URI }
deriving(Show, Eq)
buildQuery :: [(String,String)] -> URL_Query
buildQuery qis = URL_Query ("?" ++ intercalate "&" (map (\(a,b) -> (esc a) ++ "=" ++ (esc b)) qis)) where
esc x = Client.escapeURIString Client.isAllowedInURI x
urlCreate :: URL_Protocol -> URL_Host -> Maybe URL_Port -> URL_Path -> URL_Query -> Either Error URL
urlCreate URL_Protocol{..} URL_Host{..} port URL_Path{..} URL_Query{..} =
pure $ URL $ Client.URI (urlproto ++ ":") (Just (Client.URIAuth "" urlh (maybe "" ((":"++).urlp) port))) urlpath urlq []
urlFromString :: String -> Either Error URL
urlFromString s =
case Client.parseURI s of
Nothing -> Left (ErrorParseURL s "Client.parseURI failed")
Just u -> Right (URL u)
splitFragments :: String -> String -> String -> [(String,String)]
splitFragments sep eqs =
filter (\(a, b) -> not (null a))
. map (f . splitOn eqs)
. concat
. map (splitOn sep)
. lines
where f [] = ("", "")
f [x] = (trim x, "")
f (x:xs) = (trim x, trim $ intercalate eqs xs)
trim = rev (dropWhile (`elem` (" \t\n\r" :: String)))
where rev f = reverse . f . reverse . f
urlFragments :: URL -> [(String,String)]
urlFragments URL{..} = splitFragments "&" "=" $ unsharp $ Client.uriFragment uri where
unsharp ('#':x) = x
unsharp y = y
data Cookies = Cookies { jar :: Client.CookieJar }
deriving(Show,Eq)
cookiesCreate :: () -> Cookies
cookiesCreate () = Cookies (Client.createCookieJar [])
data Request = Request {
req :: Client.Request
, req_jar :: Client.CookieJar
}
requestCreateGet :: (MonadClient m s) => URL -> Cookies -> m (Either Error Request)
requestCreateGet URL{..} Cookies{..} = do
case setUri Client.defaultRequest uri of
Left exc -> do
return $ Left $ ErrorSetURL (URL uri) (show exc)
Right r -> do
now <- liftIO getCurrentTime
(r',_) <- pure $ Client.insertCookiesIntoRequest r jar now
return $ Right $ Request {
req = r'{
Client.redirectCount = 0
},
req_jar = jar
}
requestCreatePost :: (MonadClient m s) => FilledForm -> Cookies -> m (Either Error Request)
requestCreatePost (FilledForm tit Shpider.Form{..}) c = do
case Client.parseURI (Client.escapeURIString Client.isAllowedInURI action) of
Nothing -> return (Left (ErrorParseURL action "parseURI failed"))
Just action_uri -> do
r <- requestCreateGet (URL action_uri) c
case r of
Left err -> do
return $ Left err
Right Request{..} -> do
return $ Right $ Request (Client.urlEncodedBody (map (BS.pack *** BS.pack) $ Map.toList inputs) req) req_jar
requestUploadPhoto :: (MonadClient m s) => Text -> ByteString -> m (Either Error Request)
requestUploadPhoto text_url bs = do
case Client.parseURI (Text.unpack text_url) of
Nothing -> return (Left (ErrorParseURL (Text.unpack text_url) "parseURI failed"))
Just uri -> do
r <- requestCreateGet (URL uri) (cookiesCreate ())
case r of
Left err -> do
return $ Left err
Right Request{..} -> do
return $ Right $ Request ((Client.urlEncodedBody [("photo", bs)]) req) req_jar
data Response = Response {
resp :: Client.Response (Pipes.Producer ByteString IO ())
, resp_body :: ByteString
}
responseBodyS :: Response -> String
responseBodyS Response{..} = BS.unpack $ resp_body
responseBody :: Response -> ByteString
responseBody Response{..} = resp_body
dumpResponseBody :: (MonadClient m s) => FilePath -> Response -> m ()
dumpResponseBody f Response{..} = liftIO $ BS.writeFile f resp_body
responseCookies :: Response -> Cookies
responseCookies Response{..} = Cookies (Client.responseCookieJar resp)
responseHeaders :: Response -> [(String,String)]
responseHeaders Response{..} =
map (\(o,h) -> (BS.unpack (CI.original o), BS.unpack h)) $ Client.responseHeaders resp
responseCode :: Response -> Int
responseCode Response{..} = Client.statusCode $ Client.responseStatus resp
responseCodeMessage :: Response -> String
responseCodeMessage Response{..} = BS.unpack $ Client.statusMessage $ Client.responseStatus resp
responseRedirect :: Response -> Maybe URL
responseRedirect r =
case lookup "Location" (responseHeaders r) of
Just loc -> URL <$> Client.parseURI loc
Nothing -> Nothing
responseOK :: Response -> Bool
responseOK r = c == 200 where
c = responseCode r
requestExecute :: (MonadClient m s) => Request -> m (Response, Cookies)
requestExecute Request{..} = do
jar <- pure req_jar
ClientState{..} <- toClientState <$> get
clk <- liftIO $ do
clk <- Clock.getTime Clock.Realtime
let interval_ns = toNanoSecs (clk `diffTimeSpec` cl_last_execute)
when (interval_ns < cl_minimum_interval_ns) $ do
threadDelay (fromInteger $ (cl_minimum_interval_ns interval_ns) `div` 1000);
return clk
modify (modifyClientState (\s -> s{cl_last_execute = clk}))
liftIO $ do
Pipes.withHTTP req cl_man $ \resp -> do
resp_body <- PP.foldM (\a b -> return $ BS.append a b) (return BS.empty) return (Client.responseBody resp)
now <- getCurrentTime
let (jar', resp') = Client.updateCookieJar resp req now jar
return (Response resp resp_body, Cookies jar')
downloadFileWith :: (MonadClient m s) => URL -> (ByteString -> IO ()) -> m ()
downloadFileWith url h = do
(ClientState{..}) <- toClientState <$> get
(Right Request{..}) <- requestCreateGet url (cookiesCreate ())
liftIO $ Pipes.withHTTP req cl_man $ \resp -> do
PP.foldM (\() a -> h a) (return ()) (const (return ())) (Client.responseBody resp)