- get_page,
- log_in,
- make_cookie_jar)
-import LWN.URI (URL, try_make_absolute_url)
-import LWN.XHTML (XHTML, parse_lwn, to_xhtml)
-import Misc (contains)
-
-
--- | 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 :: Cfg -> URL -> IO (Maybe (IOStateArrow s b XmlTree))
-get_xml_from_article cfg article_name = do
- my_article <- real_article_path article_name
- is_file <- doesFileExist my_article
- case is_file of
- True -> do
- contents <- readFile my_article
- return $ Just $ parse_lwn contents
- False -> do
- -- Download the URL and try to parse it.
- 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)
-
- case li_result of
- Left err -> do
- let msg = "Failed to log in. " ++ err
- hPutStrLn stderr msg
- Right response_body -> do
- hPutStrLn stderr response_body
-
- 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 $ parse_lwn 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 $ parse_lwn h