import Data.String.Utils (split, strip)
import Data.Maybe (catMaybes, fromJust, isNothing)
import Prelude hiding (readFile)
-import System.Directory (doesFileExist)
-import System.IO (Handle, hClose, hFlush, hPutStrLn, stderr)
-import System.IO.UTF8 (readFile)
+import System.IO (Handle, hClose, hFlush)
import Test.HUnit (Assertion, assertEqual)
import Test.Framework (Test, testGroup)
import Test.Framework.Providers.HUnit (testCase)
import Text.XML.HXT.Core (
ArrowXml,
IOSArrow,
- IOStateArrow,
XmlTree,
(>>>),
(/>),
(//>),
changeAttrValue,
- getAttrValue,
getChildren,
getText,
- hasAttrValue,
hasName,
- isElem,
- mkName,
- none,
processAttrl,
processTopDown,
runX,
- setElemName,
xshow,
when)
import Text.HandsomeSoup (css, parseHtml)
-import Configuration (Cfg, password, use_account, username)
+import Configuration (Cfg)
import LWN.Article
import LWN.HTTP (
ImageMap,
download_image_urls,
- 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
+ get_article_contents)
+import LWN.URI (URL)
+import LWN.XHTML (
+ XHTML,
+ image_srcs,
+ is_image,
+ preprocess,
+ remove_byline,
+ remove_title,
+ to_xhtml,
+ xml_from_contents)
--- Should be called *after* preprocessing.
-download_images :: IOSArrow XmlTree XmlTree -> IO ImageMap
-download_images xml = do
- image_urls <- runX $ xml >>> image_srcs
- download_image_urls image_urls
-
data Page =
-- | An LWN page with one article on it.
page_from_url :: Cfg -> URL -> IO (Maybe Page)
page_from_url cfg url = do
- maybe_html <- get_xml_from_article cfg url
- case maybe_html of
+ contents <- get_article_contents cfg url
+ case (xml_from_contents contents) of
Just html -> parse html
Nothing -> return Nothing
-is_link :: (ArrowXml a) => a XmlTree XmlTree
-is_link =
- isElem >>> hasName "a"
-
-
-remove_comment_links :: (ArrowXml a) => a XmlTree XmlTree
-remove_comment_links =
- processTopDown $ kill_comments `when` is_link
- where
- is_comment_link =
- hasAttrValue "href" (contains "#Comments")
-
- kill_comments =
- none `when` is_comment_link
-
-replace_links_with_spans :: (ArrowXml a) => a XmlTree XmlTree
-replace_links_with_spans =
- processTopDown $ (make_span >>> remove_attrs) `when` is_link
- where
- make_span = setElemName $ mkName "span"
- remove_attrs = processAttrl none
+-- Should be called *after* preprocessing.
+download_images :: IOSArrow XmlTree XmlTree -> IO ImageMap
+download_images xml = do
+ image_urls <- runX $ xml >>> image_srcs
+ download_image_urls image_urls
--- | Preprocessing common to both page types.
-preprocess :: (ArrowXml a) => a XmlTree XmlTree
-preprocess =
- make_image_srcs_absolute
- >>>
- remove_comment_links
- >>>
- replace_links_with_spans
replace_remote_img_srcs :: (ArrowXml a) => ImageMap -> a XmlTree XmlTree
-is_title :: (ArrowXml a) => a XmlTree XmlTree
-is_title =
- (hasName "h2")
- >>>
- (hasAttrValue "class" (== "SummaryHL"))
-
-
-is_byline :: (ArrowXml a) => a XmlTree XmlTree
-is_byline =
- (hasName "div")
- >>>
- (hasAttrValue "class" (== "FeatureByLine"))
-
-
-is_image :: (ArrowXml a) => a XmlTree XmlTree
-is_image = isElem >>> hasName "img"
-
-remove_title :: (ArrowXml a) => a XmlTree XmlTree
-remove_title =
- processTopDown ((none) `when` is_title)
-
-
-remove_byline :: (ArrowXml a) => a XmlTree XmlTree
-remove_byline =
- processTopDown ((none) `when` is_byline)
-
-
fp_parse_article_body :: IOSArrow XmlTree XmlTree -> IO (Maybe String)
fp_parse_article_body xml = do
read_html = readHtml defaultParserState
-
---
--- Misc
---
-
-image_srcs :: (ArrowXml a) => a XmlTree URL
-image_srcs =
- css "img"
- >>>
- getAttrValue "src"
-
-make_image_srcs_absolute :: (ArrowXml a) => a XmlTree XmlTree
-make_image_srcs_absolute =
- processTopDown (make_srcs_absolute `when` is_image)
- where
- change_src :: (ArrowXml a) => a XmlTree XmlTree
- change_src =
- changeAttrValue try_make_absolute_url
-
- make_srcs_absolute :: (ArrowXml a) => a XmlTree XmlTree
- make_srcs_absolute =
- processAttrl $ change_src `when` hasName "src"
-
-
--
-- Tests
--
projects / dead / lwn-epub.git / blobdiff