-{-# LANGUAGE ScopedTypeVariables, RecordWildCards #-}
+{-# LANGUAGE DoAndIfThenElse #-}
module Main
where
+import Control.Concurrent (threadDelay)
+import Control.Monad (when)
+import Data.Maybe (fromJust, isJust)
import Prelude hiding (readFile)
import System.Directory (doesFileExist)
import System.IO (
Handle,
IOMode (WriteMode),
+ hPutStrLn,
openBinaryFile,
+ stderr,
stdout
)
import System.IO.UTF8 (readFile)
+import Test.HUnit (Assertion, assertEqual)
+import Test.Framework (Test, testGroup)
+import Test.Framework.Providers.HUnit (testCase)
import Text.Regex.Posix ((=~))
-import Text.XML.HXT.Core
-
+import Text.XML.HXT.Core (
+ IOStateArrow,
+ SysConfigList,
+ XmlTree,
+ no,
+ readString,
+ withParseHTML,
+ withValidate,
+ withWarnings,
+ yes
+ )
import CommandLine (show_help)
-import Configuration (Cfg(..), get_cfg)
-import LWN.Page
-import LWN.URI (is_lwn_url, make_absolute_url)
+import Configuration (Cfg(..), get_cfg, use_account)
+import LWN.HTTP (get_page, log_in, make_cookie_jar)
+import LWN.Page (epublish, parse)
+import LWN.URI (add_trailing_slash, is_lwn_url, make_absolute_url, make_https)
import Misc (contains)
my_read :: String -> IOStateArrow s b XmlTree
my_read = readString my_read_opts
+
+-- |A wrapper around threadDelay which takes seconds instead of
+-- microseconds as its argument.
+thread_sleep :: Int -> IO ()
+thread_sleep seconds = do
+ let microseconds = seconds * (10 ^ (6 :: Int))
+ threadDelay microseconds
+
+
-- | Try to parse the given article using HXT. We try a few different
-- methods; if none of them work, we return 'Nothing'.
-get_xml_from_article :: String -> IO (Maybe (IOStateArrow s b XmlTree))
-get_xml_from_article s = do
- article <- real_article_path s
- is_file <- doesFileExist article
+get_xml_from_article :: Cfg -> IO (Maybe (IOStateArrow s b XmlTree))
+get_xml_from_article cfg = do
+ my_article <- real_article_path (article cfg)
+ is_file <- doesFileExist my_article
case is_file of
True -> do
- contents <- readFile article
+ contents <- readFile my_article
return $ Just $ my_read contents
False -> do
-- Download the URL and try to parse it.
- return Nothing
+ if use_account cfg then do
+ -- use_account would be false if these fromJusts would fail.
+ cj <- make_cookie_jar
+ li_result <- log_in cj
+ (fromJust $ username cfg)
+ (fromJust $ password cfg)
+
+ -- Without this, the cookie file is empty during
+ -- get_page. Whaaat?
+ thread_sleep 1
+
+ when (isJust li_result) $ do
+ let msg = "Failed to log in. " ++ (fromJust li_result)
+ hPutStrLn stderr msg
+
+ html <- get_page (Just cj) my_article
+
+ case html of
+ Left err -> do
+ let msg = "Failed to retrieve page. " ++ err
+ hPutStrLn stderr msg
+ return Nothing
+ Right h -> return $ Just $ my_read h
+ else do
+ html <- get_page Nothing my_article
+ case html of
+ Left err -> do
+ let msg = "Failed to retrieve page. " ++ err
+ hPutStrLn stderr msg
+ return Nothing
+ Right h -> return $ Just $ my_read h
-- | If we're given an empty path, return a handle to
-- 'stdout'. Otherwise, open the given file and return a read/write
real_article_path :: String -> IO String
real_article_path s = do
is_file <- doesFileExist s
- return $ if is_file then s else check_cases
+ return $ if is_file then s else add_trailing_slash check_cases
where
abs_current =
case make_absolute_url "current" of
Nothing -> s
Just ac -> ac
- abs_s =
- case make_absolute_url s of
+ abs_article =
+ case make_absolute_url ("Articles/" ++ s) of
Nothing -> s
Just as -> as
check_cases :: String
check_cases
- | is_lwn_url s = s
+ | is_lwn_url s = make_https s
| s `contains` "current" = abs_current
- | s =~ "^[0-9]+$" = abs_s
+ | s =~ "^[0-9]+$" = abs_article
| otherwise = s -- Give up
main :: IO ()
main = do
- Cfg{..} <- get_cfg
- output_handle <- get_output_handle output
- maybe_html <- get_xml_from_article article
+ cfg <- get_cfg
+ output_handle <- get_output_handle (output cfg)
- case maybe_html of
+ when (use_account cfg) $ do
+ putStrLn "Using account."
+ maybe_html <- get_xml_from_article cfg
+
+ case maybe_html of
Just html -> do
result <- parse html
case result of
Nothing -> do
_ <- show_help
return ()
+
+
+test_current_article_path :: Assertion
+test_current_article_path = do
+ let expected = "https://lwn.net/current/"
+ actual <- real_article_path "current"
+ assertEqual "Current article path constructed" expected actual
+
+test_numbered_article_path :: Assertion
+test_numbered_article_path = do
+ let expected = "https://lwn.net/Articles/69/"
+ actual <- real_article_path "69" -- I'm twelve
+ assertEqual "Numbered article path constructed" expected actual
+
+
+test_full_article_path :: Assertion
+test_full_article_path = do
+ let expected = "https://lwn.net/Articles/502979/"
+ actual <- real_article_path "https://lwn.net/Articles/502979/"
+ assertEqual "Full article path left alone" expected actual
+
+test_non_https_article_path :: Assertion
+test_non_https_article_path = do
+ let expected = "https://lwn.net/Articles/502979/"
+ actual <- real_article_path "http://lwn.net/Articles/502979/"
+ assertEqual "Non-https URL made https" expected actual
+
+main_tests :: Test
+main_tests =
+ testGroup "Main Tests" [
+ testCase "Current article path constructed" test_current_article_path,
+ testCase "Numbered article path constructed" test_numbered_article_path,
+ testCase "Full article path left alone" test_full_article_path,
+ testCase "Non-https URL made https" test_non_https_article_path ]