gitit-0.5: Gitit.hs
{-# LANGUAGE Rank2Types, FlexibleContexts #-}
{-
Copyright (C) 2008 John MacFarlane <jgm@berkeley.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-}
module Main where
import HAppS.Server hiding (look, lookRead, lookCookieValue, mkCookie)
import Gitit.HAppS (look, lookRead, lookCookieValue, mkCookie)
import System.Environment
import System.IO.UTF8
import System.IO (stderr)
import System.IO.Error (isAlreadyExistsError)
import Control.Exception (bracket, throwIO, catch, try)
import Prelude hiding (writeFile, readFile, putStrLn, putStr, catch)
import System.Directory
import System.Time
import Control.Concurrent
import System.FilePath
import Gitit.State
import Text.XHtml hiding ( (</>), dir, method, password, rev )
import qualified Text.XHtml as X ( password, method )
import Data.List (intersect, intersperse, intercalate, sort, nub, sortBy, isSuffixOf, find, isPrefixOf)
import Data.Maybe (fromMaybe, fromJust, mapMaybe, isJust, isNothing)
import Data.ByteString.UTF8 (fromString, toString)
import Codec.Binary.UTF8.String (decodeString, encodeString)
import qualified Data.Map as M
import Data.Ord (comparing)
import Paths_gitit
import Text.Pandoc
import Text.Pandoc.ODT (saveOpenDocumentAsODT)
import Text.Pandoc.Definition (processPandoc)
import Text.Pandoc.Shared (HTMLMathMethod(..), substitute)
import Data.Char (isAlphaNum, isAlpha, toLower)
import Control.Monad.Reader
import qualified Data.ByteString.Lazy as B
import Codec.Compression.GZip (compress)
import Network.HTTP (urlEncodeVars, urlEncode)
import System.Console.GetOpt
import System.Exit
import Text.Highlighting.Kate
import qualified Text.StringTemplate as T
import Data.DateTime (getCurrentTime, addMinutes, parseDateTime, DateTime, formatDateTime)
import Network.Socket
import Network.Captcha.ReCaptcha (captchaFields, validateCaptcha)
import Data.FileStore
gititVersion :: String
gititVersion = "0.5"
sessionTime :: Int
sessionTime = 60 * 60 -- session will expire 1 hour after page request
main :: IO ()
main = do
argv <- getArgs
options <- parseArgs argv
conf <- foldM handleFlag defaultConfig options
-- check for external programs that are needed
let prereqs = "grep" : case repository conf of
Git _ -> ["git"]
Darcs _ -> ["darcs"]
forM_ prereqs $ \prog ->
findExecutable prog >>= \mbFind ->
when (isNothing mbFind) $ error $ "Required program '" ++ prog ++ "' not found in system path."
-- read user file and update state
userFileExists <- doesFileExist $ userFile conf
users' <- if userFileExists
then readFile (userFile conf) >>= (return . M.fromList . read)
else return M.empty
-- create template file if it doesn't exist, and read it
let templatefile = templateFile conf
templateExists <- doesFileExist templatefile
unless templateExists $ do
templatePath <- getDataFileName $ "data" </> "template.html"
copyFile templatePath templatefile
hPutStrLn stderr $ "Created " ++ templatefile
templ <- liftIO $ readFile (templateFile conf)
-- initialize state
initializeAppState conf users' (T.newSTMP templ)
-- setup the page repository and static files, if they don't exist
initializeWiki conf
-- start the server
hPutStrLn stderr $ "Starting server on port " ++ show (portNumber conf)
let debugger = if debugMode conf then debugFilter else id
tid <- forkIO $ simpleHTTP (Conf { validator = Nothing, port = portNumber conf }) $
debugger $
[ dir "css" [ withExpiresHeaders $ fileServe [] $ staticDir conf </> "css" ]
, dir "img" [ withExpiresHeaders $ fileServe [] $ staticDir conf </> "img" ]
, dir "js" [ withExpiresHeaders $ fileServe [] $ staticDir conf </> "js" ]
] ++
(if debugMode conf then debugHandlers else []) ++
map (filterIf acceptsZip gzipBinary) wikiHandlers
waitForTermination
putStrLn "Shutting down..."
killThread tid
putStrLn "Shutdown complete"
filterIf :: (Request -> Bool) -> (Response -> Response) -> ServerPart Response -> ServerPart Response
filterIf test filt sp =
let handler = unServerPartT sp
in withRequest $ \req ->
if test req
then liftM filt $ handler req
else handler req
gzipBinary :: Response -> Response
gzipBinary r@(Response {rsBody = b}) = setHeader "Content-Encoding" "gzip" $ r {rsBody = compress b}
acceptsZip :: Request -> Bool
acceptsZip req = isJust $ M.lookup (fromString "accept-encoding") (rqHeaders req)
getCacheTime :: IO (Maybe DateTime)
getCacheTime = liftM (Just . addMinutes 360) $ getCurrentTime
withExpiresHeaders :: ServerPart Response -> ServerPart Response
withExpiresHeaders sp = require getCacheTime $ \t -> [liftM (setHeader "Expires" $ formatDateTime "%a, %d %b %Y %T GMT" t) sp]
setContentType :: String -> Response -> Response
setContentType = setHeader "Content-Type"
setFilename :: String -> Response -> Response
setFilename = setHeader "Content-Disposition" . \fname -> "attachment: filename=\"" ++ fname ++ "\""
data Opt
= Help
| ConfigFile FilePath
| Version
deriving (Eq)
flags :: [OptDescr Opt]
flags =
[ Option ['h'] [] (NoArg Help)
"Print this help message"
, Option ['v'] [] (NoArg Version)
"Print version information"
, Option ['f'] [] (ReqArg ConfigFile "FILE")
"Specify configuration file"
]
parseArgs :: [String] -> IO [Opt]
parseArgs argv = do
progname <- getProgName
case getOpt Permute flags argv of
(opts,_,[]) -> return opts
(_,_,errs) -> hPutStrLn stderr (concat errs ++ usageInfo (usageHeader progname) flags) >>
exitWith (ExitFailure 1)
usageHeader :: String -> String
usageHeader progname = "Usage: " ++ progname ++ " [opts...]"
copyrightMessage :: String
copyrightMessage = "\nCopyright (C) 2008 John MacFarlane\n" ++
"This is free software; see the source for copying conditions. There is no\n" ++
"warranty, not even for merchantability or fitness for a particular purpose."
handleFlag :: Config -> Opt -> IO Config
handleFlag _ opt = do
progname <- getProgName
case opt of
Help -> hPutStrLn stderr (usageInfo (usageHeader progname) flags) >> exitWith ExitSuccess
Version -> hPutStrLn stderr (progname ++ " version " ++ gititVersion ++ copyrightMessage) >> exitWith ExitSuccess
ConfigFile f -> liftM read (readFile f)
-- | Create repository and public directories, unless they already exist.
initializeWiki :: Config -> IO ()
initializeWiki conf = do
let staticdir = staticDir conf
fs <- getFileStore
repoExists <- liftIO $ catch (initialize fs >> return False)
(\e -> if e == RepositoryExists then return True else throwIO e >> return False)
unless repoExists $ do
welcomepath <- getDataFileName $ "data" </> "FrontPage.page"
welcomecontents <- B.readFile welcomepath
helppath <- getDataFileName $ "data" </> "Help.page"
helpcontents <- B.readFile helppath
-- add front page and help page
liftIO $ create fs (frontPage conf <.> "page") (Author "Gitit" "") "Default front page" welcomecontents
liftIO $ create fs "Help.page" (Author "Gitit" "") "Default front page" helpcontents
hPutStrLn stderr "Created repository"
staticExists <- doesDirectoryExist staticdir
unless staticExists $ do
createDirectoryIfMissing True $ staticdir </> "css"
let stylesheets = map ("css" </>) ["screen.css", "print.css", "ie.css", "hk-pyg.css"]
stylesheetpaths <- mapM getDataFileName stylesheets
zipWithM_ copyFile stylesheetpaths (map (staticdir </>) stylesheets)
createDirectoryIfMissing True $ staticdir </> "img" </> "icons"
let imgs = map (("img" </>) . ("icons" </>))
["cross.png", "doc.png", "email.png", "external.png", "feed.png", "folder.png",
"im.png", "key.png", "page.png", "pdf.png", "tick.png", "xls.png"]
imgpaths <- mapM getDataFileName imgs
zipWithM_ copyFile imgpaths (map (staticdir </>) imgs)
logopath <- getDataFileName $ "img" </> "gitit-dog.png"
copyFile logopath (staticdir </> "img" </> "logo.png")
createDirectoryIfMissing True $ staticdir </> "js"
let javascripts = ["jquery.min.js", "jquery-ui.packed.js",
"folding.js", "dragdiff.js", "preview.js", "search.js", "uploadForm.js"]
javascriptpaths <- mapM getDataFileName $ map ("js" </>) javascripts
zipWithM_ copyFile javascriptpaths $ map ((staticdir </> "js") </>) javascripts
hPutStrLn stderr $ "Created " ++ staticdir ++ " directory"
jsMathExists <- doesDirectoryExist (staticdir </> "js" </> "jsMath")
updateAppState $ \s -> s{ jsMath = jsMathExists }
unless jsMathExists $ do
hPutStrLn stderr $ replicate 80 '*' ++
"\nWarning: jsMath not found.\n" ++
"If you want support for math, copy the jsMath directory into " ++ staticdir ++ "/js/\n" ++
"jsMath can be obtained from http://www.math.union.edu/~dpvc/jsMath/\n" ++
replicate 80 '*'
type Handler = ServerPart Response
debugHandlers :: [Handler]
debugHandlers = [ withCommand "params" [ handlePage GET $ \_ params -> ok (toResponse $ show params),
handlePage POST $ \_ params -> ok (toResponse $ show params) ]
, withCommand "page" [ handlePage GET $ \page _ -> ok (toResponse $ show page),
handlePage POST $ \page _ -> ok (toResponse $ show page) ]
, withCommand "request" [ withRequest $ \req -> ok $ toResponse $ show req ] ]
wikiHandlers :: [Handler]
wikiHandlers = [ handlePath "_index" GET indexPage
, handlePath "_activity" GET showActivity
, handlePath "_preview" POST preview
, handlePath "_go" POST goToPage
, handlePath "_search" POST searchResults
, handlePath "_search" GET searchResults
, handlePath "_register" GET registerUserForm
, handlePath "_register" POST registerUser
, handlePath "_login" GET loginUserForm
, handlePath "_login" POST loginUser
, handlePath "_logout" GET logoutUser
, handlePath "_upload" GET (ifLoggedIn uploadForm)
, handlePath "_upload" POST (ifLoggedIn uploadFile)
, handlePath "_random" GET randomPage
, handlePath "" GET showFrontPage
, withCommand "showraw" [ handlePage GET showRawPage ]
, withCommand "history" [ handlePage GET showPageHistory,
handle (not . isPage) GET showFileHistory ]
, withCommand "edit" [ handlePage GET $ unlessNoEdit $ ifLoggedIn editPage ]
, withCommand "diff" [ handlePage GET showPageDiff,
handle isSourceCode GET showFileDiff ]
, withCommand "export" [ handlePage POST exportPage, handlePage GET exportPage ]
, withCommand "cancel" [ handlePage POST showPage ]
, withCommand "discuss" [ handlePage GET discussPage ]
, withCommand "update" [ handlePage POST $ unlessNoEdit $ ifLoggedIn updatePage ]
, withCommand "delete" [ handlePage GET $ unlessNoDelete $ ifLoggedIn confirmDelete,
handlePage POST $ unlessNoDelete $ ifLoggedIn deletePage ]
, handleSourceCode
, handleAny
, handlePage GET showPage
]
data Recaptcha = Recaptcha {
recaptchaChallengeField :: String
, recaptchaResponseField :: String
} deriving (Read, Show)
data Params = Params { pUsername :: String
, pPassword :: String
, pPassword2 :: String
, pRevision :: Maybe String
, pDestination :: String
, pReferer :: Maybe String
, pUri :: String
, pForUser :: String
, pSince :: Maybe DateTime
, pRaw :: String
, pLimit :: Int
, pPatterns :: [String]
, pGotoPage :: String
, pEditedText :: Maybe String
, pMessages :: [String]
, pFrom :: Maybe String
, pTo :: Maybe String
, pFormat :: String
, pSHA1 :: String
, pLogMsg :: String
, pEmail :: String
, pFullName :: String
, pAccessCode :: String
, pWikiname :: String
, pPrintable :: Bool
, pOverwrite :: Bool
, pFilename :: String
, pFileContents :: B.ByteString
, pUser :: String
, pConfirm :: Bool
, pSessionKey :: Maybe SessionKey
, pRecaptcha :: Recaptcha
, pIPAddress :: String
} deriving Show
instance FromData Params where
fromData = do
un <- look "username" `mplus` return ""
pw <- look "password" `mplus` return ""
p2 <- look "password2" `mplus` return ""
rv <- (look "revision" >>= \s ->
return (if null s then Nothing else Just s)) `mplus` return Nothing
fu <- look "forUser" `mplus` return ""
si <- (look "since" >>= return . parseDateTime "%Y-%m-%d") `mplus` return Nothing -- YYYY-mm-dd format
ds <- (lookCookieValue "destination") `mplus` return "/"
ra <- look "raw" `mplus` return ""
lt <- look "limit" `mplus` return "100"
pa <- look "patterns" `mplus` return ""
gt <- look "gotopage" `mplus` return ""
me <- lookRead "messages" `mplus` return []
fm <- (look "from" >>= return . Just) `mplus` return Nothing
to <- (look "to" >>= return . Just) `mplus` return Nothing
et <- (look "editedText" >>= return . Just . filter (/= '\r')) `mplus` return Nothing
fo <- look "format" `mplus` return ""
sh <- look "sha1" `mplus` return ""
lm <- look "logMsg" `mplus` return ""
em <- look "email" `mplus` return ""
na <- look "fullname" `mplus` return ""
wn <- look "wikiname" `mplus` return ""
pr <- (look "printable" >> return True) `mplus` return False
ow <- (look "overwrite" >>= return . (== "yes")) `mplus` return False
fn <- (lookInput "file" >>= return . fromMaybe "" . inputFilename) `mplus` return ""
fc <- (lookInput "file" >>= return . inputValue) `mplus` return B.empty
ac <- look "accessCode" `mplus` return ""
cn <- (look "confirm" >> return True) `mplus` return False
sk <- (readCookieValue "sid" >>= return . Just) `mplus` return Nothing
rc <- look "recaptcha_challenge_field" `mplus` return ""
rr <- look "recaptcha_response_field" `mplus` return ""
return $ Params { pUsername = un
, pPassword = pw
, pPassword2 = p2
, pRevision = rv
, pForUser = fu
, pSince = si
, pDestination = ds
, pReferer = Nothing -- this gets set by handle...
, pUri = "" -- this gets set by handle...
, pRaw = ra
, pLimit = read lt
, pPatterns = words pa
, pGotoPage = gt
, pMessages = me
, pFrom = fm
, pTo = to
, pEditedText = et
, pFormat = fo
, pSHA1 = sh
, pLogMsg = lm
, pEmail = em
, pFullName = na
, pWikiname = wn
, pPrintable = pr
, pOverwrite = ow
, pFilename = fn
, pFileContents = fc
, pAccessCode = ac
, pUser = "" -- this gets set by ifLoggedIn...
, pConfirm = cn
, pSessionKey = sk
, pRecaptcha = Recaptcha { recaptchaChallengeField = rc, recaptchaResponseField = rr }
, pIPAddress = "" -- this gets set by handle...
}
getLoggedInUser :: MonadIO m => Params -> m (Maybe String)
getLoggedInUser params = do
mbSd <- maybe (return Nothing) getSession $ pSessionKey params
let user = case mbSd of
Nothing -> Nothing
Just sd -> Just $ sessionUser sd
return $! user
data Command = Command (Maybe String)
commandList :: [String]
commandList = ["page", "request", "params", "edit", "showraw", "history", "export", "diff", "cancel", "update", "delete", "discuss"]
instance FromData Command where
fromData = do
pairs <- lookPairs
return $ case map fst pairs `intersect` commandList of
[] -> Command Nothing
(c:_) -> Command $ Just c
unlessNoEdit :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
unlessNoEdit responder =
\page params -> do cfg <- getConfig
if page `elem` noEdit cfg
then showPage page (params { pMessages = ("Page is locked." : pMessages params) })
else responder page params
unlessNoDelete :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
unlessNoDelete responder =
\page params -> do cfg <- getConfig
if page `elem` noDelete cfg
then showPage page (params { pMessages = ("Page cannot be deleted." : pMessages params) })
else responder page params
ifLoggedIn :: (String -> Params -> Web Response) -> (String -> Params -> Web Response)
ifLoggedIn responder =
\page params -> do user <- getLoggedInUser params
case user of
Nothing -> do
loginUserForm page (params { pReferer = Just $ pUri params })
Just u -> do
usrs <- queryAppState users
let e = case M.lookup u usrs of
Just usr -> uEmail usr
Nothing -> error $ "User '" ++ u ++ "' not found."
-- give the user another hour...
addCookie sessionTime (mkCookie "sid" (show $ fromJust $ pSessionKey params))
responder page (params { pUser = u, pEmail = e })
handle :: (String -> Bool) -> Method -> (String -> Params -> Web Response) -> Handler
handle pathtest meth responder = uriRest $ \uri ->
let path' = decodeString $ uriPath uri
in if pathtest path'
then withData $ \params ->
[ withRequest $ \req ->
if rqMethod req == meth
then do
let referer = case M.lookup (fromString "referer") (rqHeaders req) of
Just r | not (null (hValue r)) -> Just $ toString $ head $ hValue r
_ -> Nothing
let peer = fst $ rqPeer req
mbIPaddr <- liftIO $ lookupIPAddr peer
let ipaddr = case mbIPaddr of
Just ip -> ip
Nothing -> "0.0.0.0"
-- force ipaddr to be strictly evaluated, or we run into problems when validating captchas
ipaddr `seq` responder path' (params { pReferer = referer,
pUri = uri,
pIPAddress = ipaddr })
else noHandle ]
else anyRequest noHandle
lookupIPAddr :: String -> IO (Maybe String)
lookupIPAddr hostname = do
addrs <- getAddrInfo (Just defaultHints) (Just hostname) Nothing
if null addrs
then return Nothing
else return $ Just $ takeWhile (/=':') $ show $ addrAddress $ head addrs
-- | Returns path portion of URI, without initial /.
-- Consecutive spaces are collapsed. We don't want to distinguish 'Hi There' and 'Hi There'.
uriPath :: String -> String
uriPath = unwords . words . drop 1 . takeWhile (/='?')
handlePage :: Method -> (String -> Params -> Web Response) -> Handler
handlePage = handle isPage
handleText :: Method -> (String -> Params -> Web Response) -> Handler
handleText = handle (\x -> isPage x || isSourceCode x)
handlePath :: String -> Method -> (String -> Params -> Web Response) -> Handler
handlePath path' = handle (== path')
withCommand :: String -> [Handler] -> Handler
withCommand command handlers =
withData $ \com -> case com of
Command (Just c) | c == command -> handlers
_ -> []
handleSourceCode :: Handler
handleSourceCode = withData $ \com ->
case com of
Command (Just "showraw") -> [ handle isSourceCode GET showFileAsText ]
_ -> [ handle isSourceCode GET showHighlightedSource ]
handleAny :: Handler
handleAny =
uriRest $ \uri -> let path' = uriPath uri
in do fs <- getFileStore
mimetype <- getMimeTypeForExtension (takeExtension path')
res <- liftIO $ try $ (retrieve fs path' Nothing :: IO B.ByteString)
case res of
Right contents -> anyRequest $ ok $ setContentType mimetype $
(toResponse noHtml) {rsBody = contents} -- ugly hack
Left NotFound -> anyRequest noHandle
Left e -> error (show e)
orIfNull :: String -> String -> String
orIfNull str backup = if null str then backup else str
isPage :: String -> Bool
isPage ('_':_) = False
isPage s = '.' `notElem` s
isDiscussPage :: String -> Bool
isDiscussPage s = isPage s && ":discuss" `isSuffixOf` s
isSourceCode :: String -> Bool
isSourceCode = not . null . languagesByExtension . takeExtension
urlForPage :: String -> String
urlForPage page = '/' : (substitute "%2f" "/" $ urlEncode $ encodeString page)
-- this is needed so that browsers recognize relative URLs correctly
pathForPage :: String -> FilePath
pathForPage page = page <.> "page"
withCommands :: Method -> [String] -> (String -> Request -> Web Response) -> Handler
withCommands meth commands page = withRequest $ \req -> do
if rqMethod req /= meth
then noHandle
else if all (`elem` (map fst $ rqInputs req)) commands
then page (intercalate "/" $ rqPaths req) req
else noHandle
showRawPage :: String -> Params -> Web Response
showRawPage = showFileAsText . pathForPage
showFileAsText :: String -> Params -> Web Response
showFileAsText file params = do
mContents <- rawContents file params
case mContents of
Nothing -> error "Unable to retrieve page contents."
Just c -> ok $ setContentType "text/plain; charset=utf-8" $ toResponse $ encodeString c
randomPage :: String -> Params -> Web Response
randomPage _ _ = do
fs <- getFileStore
files <- liftIO $ index fs
let pages = map dropExtension $ filter (\f -> takeExtension f == ".page" && not (":discuss.page" `isSuffixOf` f)) files
if null pages
then error "No pages found!"
else do
TOD _ picosecs <- liftIO getClockTime
let newPage = pages !! ((fromIntegral picosecs `div` 1000000) `mod` length pages)
seeOther (urlForPage newPage) $ toResponse $ p << "Redirecting to a random page"
showFrontPage :: String -> Params -> Web Response
showFrontPage _ params = do
cfg <- getConfig
showPage (frontPage cfg) params
showPage :: String -> Params -> Web Response
showPage page params = do
jsMathExists <- queryAppState jsMath
mbCached <- lookupCache (pathForPage page) (pRevision params)
case mbCached of
Just cp ->
formattedPage (defaultPageLayout { pgScripts = ["jsMath/easy/load.js" | jsMathExists]}) page params $ cpContents cp
_ -> do
mDoc <- pageAsPandoc page params
case mDoc of
Just d -> do
let divify c = thediv ! [identifier "wikipage",
strAttr "onDblClick" ("window.location = '" ++ urlForPage page ++
"?edit" ++
(case (pRevision params) of
Nothing -> ""
Just r -> urlEncodeVars [("revision", r),("logMsg", "Revert to " ++ r)]) ++ "';")] << c
c <- liftM divify $ pandocToHtml d
when (isNothing (pRevision params)) $ do
-- TODO not quite ideal, since page might have been modified after being retrieved by pageAsPandoc
-- better to have pageAsPandoc return the revision ID too...
fs <- getFileStore
rev <- liftIO $ latest fs (pathForPage page)
cacheContents (pathForPage page) rev c
formattedPage (defaultPageLayout { pgScripts = ["jsMath/easy/load.js" | jsMathExists]}) page params c
Nothing -> createPage page params
discussPage :: String -> Params -> Web Response
discussPage page params = do
if isDiscussPage page
then showPage page params
else showPage (page ++ ":discuss") params
createPage :: String -> Params -> Web Response
createPage page params =
formattedPage (defaultPageLayout { pgTabs = [] }) page params $
p << [ stringToHtml ("There is no page '" ++ page ++ "'. You may create the page by ")
, anchor ! [href $ urlForPage page ++ "?edit"] << "clicking here." ]
validate :: [(Bool, String)] -- ^ list of conditions and error messages
-> [String] -- ^ list of error messages
validate = foldl go []
where go errs (condition, msg) = if condition then msg:errs else errs
uploadForm :: String -> Params -> Web Response
uploadForm _ params = do
let page = "_upload"
let origPath = pFilename params
let wikiname = pWikiname params `orIfNull` takeFileName origPath
let logMsg = pLogMsg params
let upForm = form ! [X.method "post", enctype "multipart/form-data"] << fieldset <<
[ p << [label << "File to upload:", br, afile "file" ! [value origPath] ]
, p << [label << "Name on wiki, including extension",
noscript << " (leave blank to use the same filename)", stringToHtml ":", br,
textfield "wikiname" ! [value wikiname],
primHtmlChar "nbsp", checkbox "overwrite" "yes", label << "Overwrite existing file"]
, p << [label << "Description of content or changes:", br, textfield "logMsg" ! [size "60", value logMsg],
submit "upload" "Upload"] ]
formattedPage (defaultPageLayout { pgScripts = ["uploadForm.js"], pgShowPageTools = False, pgTabs = [], pgTitle = "Upload a file"} ) page params upForm
uploadFile :: String -> Params -> Web Response
uploadFile _ params = do
let page = "_upload"
let origPath = pFilename params
let fileContents = pFileContents params
let wikiname = pWikiname params `orIfNull` takeFileName origPath
let logMsg = pLogMsg params
cfg <- getConfig
mbUser <- getUser $ pUser params
(user, email) <- case mbUser of
Nothing -> fail "User must be logged in to delete page."
Just u -> return (uUsername u, uEmail u)
let overwrite = pOverwrite params
fs <- getFileStore
exists <- liftIO $ catch (latest fs wikiname >> return True) (\e -> if e == NotFound then return False else throwIO e >> return True)
let imageExtensions = [".png", ".jpg", ".gif"]
let errors = validate [ (null logMsg, "Description cannot be empty.")
, (null origPath, "File not found.")
, (not overwrite && exists, "A file named '" ++ wikiname ++
"' already exists in the repository: choose a new name " ++
"or check the box to overwrite the existing file existing file.")
, (B.length fileContents > fromIntegral (maxUploadSize cfg),
"File exceeds maximum upload size.")
, (isPage wikiname,
"This file extension is reserved for wiki pages.")
]
if null errors
then do
liftIO $ save fs wikiname (Author user email) logMsg fileContents
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Upload successful" }) page params $
thediv << [ h2 << ("Uploaded " ++ show (B.length fileContents) ++ " bytes")
, if takeExtension wikiname `elem` imageExtensions
then p << "To add this image to a page, use:" +++
pre << ("![alt text](/" ++ wikiname ++ ")")
else p << "To link to this resource from a page, use:" +++
pre << ("[link label](/" ++ wikiname ++ ")") ]
else uploadForm page (params { pMessages = errors })
goToPage :: String -> Params -> Web Response
goToPage _ params = do
let gotopage = pGotoPage params
fs <- getFileStore
allPageNames <- liftM (map dropExtension . filter (".page" `isSuffixOf`)) $ liftIO $ index fs
let findPage f = find f allPageNames
case findPage (gotopage ==) of
Just m -> seeOther (urlForPage m) $ toResponse "Redirecting to exact match"
Nothing -> case findPage (\n -> (map toLower gotopage) == (map toLower n)) of
Just m -> seeOther (urlForPage m) $ toResponse "Redirecting to case-insensitive match"
Nothing -> case findPage (\n -> (map toLower gotopage) `isPrefixOf` (map toLower n)) of
Just m -> seeOther (urlForPage m) $ toResponse "Redirecting to partial match"
Nothing -> searchResults "" params{ pPatterns = words gotopage }
searchResults :: String -> Params -> Web Response
searchResults _ params = do
let page = "_search"
let patterns = pPatterns params
let limit = pLimit params
fs <- getFileStore
matchLines <- if null patterns
then return []
else liftM (take limit) $ liftIO $ search fs defaultSearchQuery{queryPatterns = patterns}
let contentMatches = map matchResourceName matchLines
allPages <- liftM (filter (".page" `isSuffixOf`)) $ liftIO $ index fs
let matchesPatterns pageName = all (`elem` (words $ map toLower $ dropExtension pageName)) $ map (map toLower) patterns
let pageNameMatches = filter matchesPatterns allPages
let allMatchedFiles = nub $ filter (".page" `isSuffixOf`) contentMatches ++ pageNameMatches
let matches = map (\f -> (f, mapMaybe (\x -> if matchResourceName x == f then Just (matchLine x) else Nothing) matchLines)) allMatchedFiles
let relevance (f, ms) = length ms + if f `elem` pageNameMatches then 100 else 0
let preamble = if null matches
then h3 << if null patterns
then ["Please enter a search term."]
else ["No matches found for '", unwords patterns, "':"]
else h3 << [(show $ length matches), " matches found for '", unwords patterns, "':"]
let htmlMatches = preamble +++ olist << map
(\(file, contents) -> li << [anchor ! [href $ urlForPage $ takeBaseName file] << takeBaseName file,
stringToHtml (" (" ++ show (length contents) ++ " matching lines)"),
stringToHtml " ", anchor ! [href "#", theclass "showmatch", thestyle "display: none;"] <<
if length contents > 0 then "[show matches]" else "",
pre ! [theclass "matches"] << unlines contents])
(reverse $ sortBy (comparing relevance) matches)
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgScripts = ["search.js"], pgTitle = "Search results"}) page params htmlMatches
preview :: String -> Params -> Web Response
preview _ params = do
pt <- getDefaultPageType -- should get the current page type instead
pandocToHtml (textToPandoc pt $ pRaw params) >>= ok . toResponse . encodeString . renderHtmlFragment
showPageHistory :: String -> Params -> Web Response
showPageHistory page params = showHistory (pathForPage page) page params
showFileHistory :: String -> Params -> Web Response
showFileHistory file params = showHistory file file params
showHistory :: String -> String -> Params -> Web Response
showHistory file page params = do
currTime <- liftIO getCurrentTime
let oneYearAgo = addMinutes (-1 * 60 * 24 * 365) currTime
let since = case pSince params of
Nothing -> Just oneYearAgo
Just t -> Just t
fs <- getFileStore
hist <- liftIO $ history fs [file] (TimeRange since Nothing)
if null hist
then noHandle
else do
let versionToHtml rev pos =
li ! [theclass "difflink", intAttr "order" pos, strAttr "revision" $ revId rev] <<
[thespan ! [theclass "date"] << (show $ revDateTime rev), stringToHtml " (",
thespan ! [theclass "author"] <<
anchor ! [href $ "/_activity?" ++ urlEncodeVars [("forUser", authorName $ revAuthor rev)]] <<
(authorName $ revAuthor rev), stringToHtml ")", stringToHtml ": ",
anchor ! [href (urlForPage page ++ "?revision=" ++ revId rev)] <<
thespan ! [theclass "subject"] << revDescription rev,
noscript << ([stringToHtml " [compare with ",
anchor ! [href $ urlForPage page ++ "?diff&from=" ++ revId rev ++
"^&to=" ++ revId rev] << "previous"] ++
(if pos /= 1
then [primHtmlChar "nbsp", primHtmlChar "bull",
primHtmlChar "nbsp",
anchor ! [href $ urlForPage page ++ "?diff&from=" ++
revId rev ++ "&to=HEAD"] << "current" ]
else []) ++
[stringToHtml "]"])]
let contents = ulist ! [theclass "history"] << zipWith versionToHtml hist [(length hist), (length hist - 1)..1]
formattedPage (defaultPageLayout { pgScripts = ["dragdiff.js"], pgSelectedTab = HistoryTab, pgTitle = ("Changes to " ++ page) }) page params contents
showActivity :: String -> Params -> Web Response
showActivity _ params = do
let page = "_activity"
currTime <- liftIO getCurrentTime
let oneMonthAgo = addMinutes (-1 * 60 * 24 * 30) currTime
let since = case pSince params of
Nothing -> Just oneMonthAgo
Just t -> Just t
let forUser = pForUser params
fs <- getFileStore
hist <- liftIO $ history fs [] (TimeRange since Nothing)
let fileFromChange (Added f) = f
fileFromChange (Modified f) = f
fileFromChange (Deleted f) = f
let filesFor changes revis = intersperse (primHtmlChar "nbsp") $ map
(\file -> anchor ! [href $ urlForPage file ++ "?diff&to=" ++ revis] << file) $ map
(\file -> if ".page" `isSuffixOf` file then dropExtension file else file) $ map fileFromChange changes
let heading = h1 << ("Recent changes" ++ if null forUser then "" else (" by " ++ forUser))
let contents = ulist ! [theclass "history"] << map (\rev -> li <<
[thespan ! [theclass "date"] << (show $ revDateTime rev), stringToHtml " (",
thespan ! [theclass "author"] <<
anchor ! [href $ "/_activity?" ++ urlEncodeVars [("forUser", authorName $ revAuthor rev)]] <<
(authorName $ revAuthor rev), stringToHtml "): ",
thespan ! [theclass "subject"] << revDescription rev, stringToHtml " (",
thespan ! [theclass "files"] << filesFor (revChanges rev) (revId rev),
stringToHtml ")"]) hist
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Recent changes" }) page params (heading +++ contents)
showPageDiff :: String -> Params -> Web Response
showPageDiff page params = showDiff (pathForPage page) page params
showFileDiff :: String -> Params -> Web Response
showFileDiff page params = showDiff page page params
showDiff :: String -> String -> Params -> Web Response
showDiff file page params = do
let from = pFrom params
let to = pTo params
fs <- getFileStore
from' <- case from of
Nothing -> do
pageHist <- liftIO $ history fs [pathForPage page] (TimeRange Nothing Nothing)
if length pageHist < 2
then return Nothing
else case to of
Nothing -> return Nothing
Just t -> let (_, upto) = break (\r -> idsMatch fs (revId r) t) pageHist
in return $
if length upto >= 2
then Just $ revId $ upto !! 1 -- the immediately preceding revision
else Nothing
x -> return x
rawDiff <- liftIO $ diff fs file from' to
let diffItemToHtml (B, xs) = thespan << xs
diffItemToHtml (F, xs) = thespan ! [theclass "deleted"] << xs
diffItemToHtml (S, xs) = thespan ! [theclass "added"] << xs
let formattedDiff = h2 ! [theclass "revision"] << ("Changes from " ++ case from' of { Just r -> r; Nothing -> "beginning" }) +++
pre ! [theclass "diff"] << map diffItemToHtml rawDiff
formattedPage (defaultPageLayout { pgTabs = DiffTab : pgTabs defaultPageLayout, pgSelectedTab = DiffTab })
page (params { pRevision = to }) formattedDiff
editPage :: String -> Params -> Web Response
editPage page params = do
let rev = pRevision params
let messages = pMessages params
fs <- getFileStore
(mbRev, raw) <- case pEditedText params of
Nothing -> liftIO $ catch
(do c <- liftIO $ retrieve fs (pathForPage page) rev
r <- liftIO $ case rev of
Nothing -> latest fs (pathForPage page) >>= revision fs
Just r -> revision fs r
return $ (Just $ revId r, c))
(\e -> if e == NotFound
then return (Nothing, "")
else throwIO e)
Just t -> return (if null (pSHA1 params) then Nothing else Just (pSHA1 params), t)
let logMsg = pLogMsg params
let sha1Box = case mbRev of
Just r -> textfield "sha1" ! [thestyle "display: none", value r]
Nothing -> noHtml
let editForm = gui (urlForPage page) ! [identifier "editform"] <<
[sha1Box,
textarea ! [cols "80", name "editedText", identifier "editedText"] << raw, br,
label << "Description of changes:", br,
textfield "logMsg" ! [value logMsg],
submit "update" "Save", primHtmlChar "nbsp",
submit "cancel" "Discard", primHtmlChar "nbsp",
input ! [thetype "button", theclass "editButton", identifier "previewButton",
strAttr "onClick" "updatePreviewPane();", strAttr "style" "display: none;", value "Preview" ],
thediv ! [ identifier "previewpane" ] << noHtml ]
formattedPage (defaultPageLayout { pgShowPageTools = False, pgSelectedTab = EditTab,
pgScripts = ["preview.js"], pgTitle = ("Editing " ++ page) }) page (params {pMessages = messages}) editForm
confirmDelete :: String -> Params -> Web Response
confirmDelete page params = do
let confirmForm = gui "" <<
[ p << "Are you sure you want to delete this page?"
, submit "confirm" "Yes, delete it!"
, stringToHtml " "
, submit "cancel" "No, keep it!"
, br ]
formattedPage defaultPageLayout page params confirmForm
deletePage :: String -> Params -> Web Response
deletePage page params = do
mbUser <- getUser $ pUser params
(user, email) <- case mbUser of
Nothing -> fail "User must be logged in to delete page."
Just u -> return (uUsername u, uEmail u)
if pConfirm params
then do
fs <- getFileStore
liftIO $ delete fs (pathForPage page) (Author user email) "Deleted using web interface."
seeOther "/" $ toResponse $ p << "Page deleted"
else seeOther (urlForPage page) $ toResponse $ p << "Page not deleted"
updatePage :: String -> Params -> Web Response
updatePage page params = do
mbUser <- getUser $ pUser params
(user, email) <- case mbUser of
Nothing -> fail "User must be logged in to delete page."
Just u -> return (uUsername u, uEmail u)
let editedText = case pEditedText params of
Nothing -> error "No body text in POST request"
Just b -> b
let logMsg = pLogMsg params
let oldSHA1 = pSHA1 params
fs <- getFileStore
if null logMsg
then editPage page (params { pMessages = ["Description cannot be empty."] })
else do
cfg <- getConfig
if length editedText > fromIntegral (maxUploadSize cfg)
then error "Page exceeds maximum size."
else return ()
-- ensure that every file has a newline at the end, to avoid "No newline at eof" messages in diffs
let editedText' = if null editedText || last editedText == '\n' then editedText else editedText ++ "\n"
-- check SHA1 in case page has been modified, merge
modifyRes <- if null oldSHA1
then liftIO $ create fs (pathForPage page) (Author user email) logMsg editedText' >> return (Right ())
else liftIO $ catch (modify fs (pathForPage page) oldSHA1 (Author user email) logMsg editedText')
(\e -> if e == Unchanged then return (Right ()) else throwIO e)
case modifyRes of
Right () -> seeOther (urlForPage page) $ toResponse $ p << "Page updated"
Left (MergeInfo mergedWithRev False mergedText) ->
updatePage page params{ pMessages = ("Merged with revision " ++ revId mergedWithRev) : pMessages params,
pEditedText = Just mergedText,
pSHA1 = revId mergedWithRev }
Left (MergeInfo mergedWithRev True mergedText) -> do
let mergeMsg = "The page has been edited since you checked it out. " ++
"Changes have been merged into your edits below. " ++
"Please resolve conflicts and Save."
editPage page (params { pEditedText = Just mergedText
, pSHA1 = revId mergedWithRev
, pMessages = [mergeMsg] })
indexPage :: String -> Params -> Web Response
indexPage _ params = do
let page = "_index"
fs <- getFileStore
files <- liftIO $ index fs
let htmlIndex = fileListToHtml "/" $ map splitPath $ sort $ filter (\f -> not (":discuss.page" `isSuffixOf` f)) files
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgScripts = ["folding.js"], pgTitle = "All pages" }) page params htmlIndex
-- | Map a list of nonempty lists onto a list of pairs of list heads and list of tails.
-- e.g. [[1,2],[1],[2,1]] -> [(1,[[2],[]]), (2,[[1]])]
consolidateHeads :: Eq a => [[a]] -> [(a,[[a]])]
consolidateHeads lst =
let heads = nub $ map head lst
tailsFor h = map tail [l | l <- lst, head l == h]
in map (\h -> (h, tailsFor h)) heads
-- | Create a hierarchical ordered list (with links) for a list of files
fileListToHtml :: String -> [[FilePath]] -> Html
fileListToHtml prefix lst = ulist ! [identifier "index", theclass "folding"] <<
(map (\(h, l) -> let h' = if takeExtension h == ".page" then dropExtension h else h
in if [] `elem` l
then li ! [theclass $ if takeExtension h == ".page" then "page" else "upload"] << anchor ! [href $ prefix ++ h'] << h'
else li ! [theclass "folder"] << [stringToHtml h', fileListToHtml (prefix ++ h') l]) $
consolidateHeads lst)
-- | Convert links with no URL to wikilinks, if their labels are all strings and spaces
convertWikiLinks :: Inline -> Inline
convertWikiLinks (Link ref ("", "")) | all isStringOrSpace ref =
Link ref (refToUrl ref, "Go to wiki page")
convertWikiLinks x = x
isStringOrSpace :: Inline -> Bool
isStringOrSpace Space = True
isStringOrSpace (Str _) = True
isStringOrSpace _ = False
refToUrl :: [Inline] -> String
refToUrl ((Str x):xs) = x ++ refToUrl xs
refToUrl (Space:xs) = "%20" ++ refToUrl xs
refToUrl (_:_) = error "Encountered an inline other than Str or Space"
refToUrl [] = ""
-- | Converts pandoc document to HTML.
pandocToHtml :: MonadIO m => Pandoc -> m Html
pandocToHtml pandocContents = do
cfg <- getConfig
return $ writeHtml (defaultWriterOptions { writerStandalone = False
, writerHTMLMathMethod = JsMath (Just "/js/jsMath/easy/load.js")
, writerTableOfContents = tableOfContents cfg
}) $ processPandoc convertWikiLinks pandocContents
-- | Abstract representation of page layout (tabs, scripts, etc.)
data PageLayout = PageLayout
{ pgTitle :: String
, pgScripts :: [String]
, pgShowPageTools :: Bool
, pgTabs :: [Tab]
, pgSelectedTab :: Tab
}
data Tab = ViewTab | EditTab | HistoryTab | DiscussTab | DiffTab deriving (Eq, Show)
defaultPageLayout :: PageLayout
defaultPageLayout = PageLayout
{ pgTitle = ""
, pgScripts = []
, pgShowPageTools = True
, pgTabs = [ViewTab, EditTab, HistoryTab, DiscussTab]
, pgSelectedTab = ViewTab
}
-- | Returns formatted page
formattedPage :: PageLayout -> String -> Params -> Html -> Web Response
formattedPage layout page params htmlContents = do
let rev = pRevision params
let path' = if isPage page then pathForPage page else page
fs <- getFileStore
sha1 <- case rev of
Nothing -> liftIO $ catch (latest fs path')
(\e -> if e == NotFound
then return ""
else throwIO e)
Just r -> return r
user <- getLoggedInUser params
let javascriptlinks = if null (pgScripts layout)
then ""
else renderHtmlFragment $ concatHtml $ map
(\x -> script ! [src ("/js/" ++ x), thetype "text/javascript"] << noHtml)
(["jquery.min.js", "jquery-ui.packed.js"] ++ pgScripts layout)
let pageTitle = pgTitle layout `orIfNull` page
let tabli tab = if tab == pgSelectedTab layout
then li ! [theclass "selected"]
else li
let origPage s = if ":discuss" `isSuffixOf` s then take (length s - 8) s else s
let linkForTab HistoryTab = Just $ tabli HistoryTab << anchor ! [href $ urlForPage page ++ "?history" ++
case rev of { Just r -> "&revision" ++ r; Nothing -> "" }] << "history"
linkForTab DiffTab = Just $ tabli DiffTab << anchor ! [href ""] << "diff"
linkForTab ViewTab = if isDiscussPage page
then Just $ tabli DiscussTab << anchor ! [href $ urlForPage $ origPage page] << "page"
else Just $ tabli ViewTab << anchor ! [href $ urlForPage page ++
case rev of { Just r -> "?revision=" ++ r; Nothing -> "" }] << "view"
linkForTab DiscussTab = if isDiscussPage page
then Just $ tabli ViewTab << anchor ! [href $ urlForPage page] << "discuss"
else if isPage page
then Just $ tabli DiscussTab << anchor ! [href $ urlForPage page ++ "?discuss"] << "discuss"
else Nothing
linkForTab EditTab = if isPage page
then Just $ tabli EditTab << anchor ! [href $ urlForPage page ++ "?edit" ++
(case rev of
Just r -> "&revision=" ++ r ++ "&" ++ urlEncodeVars [("logMsg", "Revert to " ++ r)]
Nothing -> "")] <<
if isNothing rev then "edit" else "revert"
else Nothing
let tabs = ulist ! [theclass "tabs"] << mapMaybe linkForTab (pgTabs layout)
let searchbox = gui ("/_search") ! [identifier "searchform"] <<
[ textfield "patterns"
, submit "search" "Search" ]
let gobox = gui ("/_go") ! [identifier "goform"] <<
[ textfield "gotopage"
, submit "go" "Go" ]
let messages = pMessages params
let htmlMessages = if null messages
then noHtml
else ulist ! [theclass "messages"] << map (li <<) messages
templ <- queryAppState template
let filledTemp = T.render $
T.setAttribute "pagetitle" pageTitle $
T.setAttribute "javascripts" javascriptlinks $
T.setAttribute "pagename" page $
(case user of
Just u -> T.setAttribute "user" u
Nothing -> id) $
(if isPage page then T.setAttribute "ispage" "true" else id) $
(if pgShowPageTools layout then T.setAttribute "pagetools" "true" else id) $
(if pPrintable params then T.setAttribute "printable" "true" else id) $
(if isJust rev then T.setAttribute "nothead" "true" else id) $
(if isJust rev then T.setAttribute "revision" (fromJust rev) else id) $
T.setAttribute "sha1" sha1 $
T.setAttribute "searchbox" (renderHtmlFragment (searchbox +++ gobox)) $
T.setAttribute "exportbox" (renderHtmlFragment $ exportBox page params) $
T.setAttribute "tabs" (renderHtmlFragment tabs) $
T.setAttribute "messages" (renderHtmlFragment htmlMessages) $
T.setAttribute "content" (renderHtmlFragment htmlContents) $
templ
ok $ setContentType "text/html" $ toResponse $ encodeString filledTemp
-- user authentication
loginForm :: Html
loginForm =
gui "/_login" ! [identifier "loginForm"] << fieldset <<
[ label << "Username ", textfield "username" ! [size "15"], stringToHtml " "
, label << "Password ", X.password "password" ! [size "15"], stringToHtml " "
, submit "login" "Login"] +++
p << [ stringToHtml "If you do not have an account, "
, anchor ! [href "/_register"] << "click here to get one." ]
loginUserForm :: String -> Params -> Web Response
loginUserForm page params =
addCookie (60 * 10) (mkCookie "destination" $ substitute " " "%20" $ fromMaybe "/" $ pReferer params) >>
loginUserForm' page params
loginUserForm' :: String -> Params -> Web Response
loginUserForm' page params =
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Login" }) page params loginForm
loginUser :: String -> Params -> Web Response
loginUser page params = do
let uname = pUsername params
let pword = pPassword params
let destination = pDestination params
allowed <- authUser uname pword
if allowed
then do
key <- newSession (SessionData uname)
addCookie sessionTime (mkCookie "sid" (show key))
addCookie 0 (mkCookie "destination" "") -- remove unneeded destination cookie
seeOther destination $ toResponse $ p << ("Welcome, " ++ uname)
else
loginUserForm' page (params { pMessages = "Authentication failed." : pMessages params })
logoutUser :: String -> Params -> Web Response
logoutUser _ params = do
let key = pSessionKey params
let destination = substitute " " "%20" $ fromMaybe "/" $ pReferer params
case key of
Just k -> do
delSession k
addCookie 0 (mkCookie "sid" "") -- make cookie expire immediately, effectively deleting it
Nothing -> return ()
seeOther destination $ toResponse "You have been logged out."
registerForm :: Web Html
registerForm = do
cfg <- getConfig
let accessQ = case accessQuestion cfg of
Nothing -> noHtml
Just (prompt, _) -> label << prompt +++ br +++
X.password "accessCode" ! [size "15"] +++ br
let captcha = if useRecaptcha cfg
then captchaFields (recaptchaPublicKey cfg) Nothing
else noHtml
return $ gui "" ! [identifier "loginForm"] << fieldset <<
[ accessQ
, label << "Username (at least 3 letters or digits):", br
, textfield "username" ! [size "20"], stringToHtml " ", br
, label << "Email (optional, will not be displayed on the Wiki):", br
, textfield "email" ! [size "20"], br
, textfield "fullname" ! [size "20", theclass "req"]
, label << "Password (at least 6 characters, including at least one non-letter):", br
, X.password "password" ! [size "20"], stringToHtml " ", br
, label << "Confirm Password:", br, X.password "password2" ! [size "20"], stringToHtml " ", br
, captcha
, submit "register" "Register" ]
registerUserForm :: String -> Params -> Web Response
registerUserForm _ params =
addCookie (60 * 10) (mkCookie "destination" $ substitute " " "%20" $ fromMaybe "/" $ pReferer params) >>
registerForm >>=
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Register for an account" }) "_register" params
registerUser :: String -> Params -> Web Response
registerUser _ params = do
let isValidUsername u = length u >= 3 && all isAlphaNum u
let isValidPassword pw = length pw >= 6 && not (all isAlpha pw)
let accessCode = pAccessCode params
let uname = pUsername params
let pword = pPassword params
let pword2 = pPassword2 params
let email = pEmail params
let fakeField = pFullName params
let recaptcha = pRecaptcha params
taken <- isUser uname
cfg <- getConfig
let isValidAccessCode = case accessQuestion cfg of
Nothing -> True
Just (_, answers) -> accessCode `elem` answers
let isValidEmail e = length (filter (=='@') e) == 1
captchaResult <- if useRecaptcha cfg
then if null (recaptchaChallengeField recaptcha) || null (recaptchaResponseField recaptcha)
then return $ Left "missing-challenge-or-response" -- no need to bother captcha.net in this case
else liftIO $ validateCaptcha (recaptchaPrivateKey cfg) (pIPAddress params) (recaptchaChallengeField recaptcha)
(recaptchaResponseField recaptcha)
else return $ Right ()
let (validCaptcha, captchaError) = case captchaResult of
Right () -> (True, Nothing)
Left err -> (False, Just err)
let errors = validate [ (taken, "Sorry, that username is already taken.")
, (not isValidAccessCode, "Incorrect response to access prompt.")
, (not (isValidUsername uname), "Username must be at least 3 charcaters, all letters or digits.")
, (not (isValidPassword pword), "Password must be at least 6 characters, with at least one non-letter.")
, (not (null email) && not (isValidEmail email), "Email address appears invalid.")
, (pword /= pword2, "Password does not match confirmation.")
, (not validCaptcha, "Failed CAPTCHA (" ++ fromJust captchaError ++ "). Are you really human?")
, (not (null fakeField), "You do not seem human enough.") ] -- fakeField is hidden in CSS (honeypot)
if null errors
then do
user <- liftIO $ mkUser uname email pword
addUser uname user
loginUser "/" (params { pUsername = uname, pPassword = pword, pEmail = email })
else registerForm >>=
formattedPage (defaultPageLayout { pgShowPageTools = False, pgTabs = [], pgTitle = "Register for an account" })
"_register" (params { pMessages = errors })
showHighlightedSource :: String -> Params -> Web Response
showHighlightedSource file params = do
mbCached <- lookupCache file (pRevision params)
case mbCached of
Just cp -> formattedPage defaultPageLayout file params $ cpContents cp
_ -> do
contents <- rawContents file params
case contents of
Just source -> let lang' = head $ languagesByExtension $ takeExtension file
in case highlightAs lang' (filter (/='\r') source) of
Left _ -> noHandle
Right res -> do
let formattedContents = formatAsXHtml [OptNumberLines] lang' res
when (isNothing (pRevision params)) $ do
fs <- getFileStore
rev <- liftIO $ latest fs file
cacheContents file rev formattedContents
formattedPage defaultPageLayout file params $ formattedContents
Nothing -> noHandle
defaultRespOptions :: WriterOptions
defaultRespOptions = defaultWriterOptions { writerStandalone = True, writerWrapText = True }
respondLaTeX :: String -> Pandoc -> Web Response
respondLaTeX page = ok . setContentType "application/x-latex" . setFilename (page ++ ".tex") . toResponse . encodeString .
writeLaTeX (defaultRespOptions {writerHeader = defaultLaTeXHeader})
respondConTeXt :: String -> Pandoc -> Web Response
respondConTeXt page = ok . setContentType "application/x-context" . setFilename (page ++ ".tex") . toResponse . encodeString .
writeConTeXt (defaultRespOptions {writerHeader = defaultConTeXtHeader})
respondRTF :: String -> Pandoc -> Web Response
respondRTF page = ok . setContentType "application/rtf" . setFilename (page ++ ".rtf") . toResponse . encodeString .
writeRTF (defaultRespOptions {writerHeader = defaultRTFHeader})
respondRST :: String -> Pandoc -> Web Response
respondRST _ = ok . setContentType "text/plain; charset=utf-8" . toResponse . encodeString .
writeRST (defaultRespOptions {writerHeader = "", writerReferenceLinks = True})
respondMan :: String -> Pandoc -> Web Response
respondMan _ = ok . setContentType "text/plain; charset=utf-8" . toResponse . encodeString .
writeMan (defaultRespOptions {writerHeader = ""})
respondS5 :: String -> Pandoc -> Web Response
respondS5 _ = ok . toResponse . writeS5 (defaultRespOptions {writerHeader = defaultS5Header,
writerS5 = True, writerIncremental = True})
respondTexinfo :: String -> Pandoc -> Web Response
respondTexinfo page = ok . setContentType "application/x-texinfo" . setFilename (page ++ ".texi") . toResponse . encodeString .
writeTexinfo (defaultRespOptions {writerHeader = ""})
respondDocbook :: String -> Pandoc -> Web Response
respondDocbook page = ok . setContentType "application/docbook+xml" . setFilename (page ++ ".xml") . toResponse . encodeString .
writeDocbook (defaultRespOptions {writerHeader = defaultDocbookHeader})
respondMediaWiki :: String -> Pandoc -> Web Response
respondMediaWiki _ = ok . setContentType "text/plain; charset=utf-8" . toResponse . encodeString .
writeMediaWiki (defaultRespOptions {writerHeader = ""})
respondODT :: String -> Pandoc -> Web Response
respondODT page doc = do
let openDoc = writeOpenDocument (defaultRespOptions {writerHeader = defaultOpenDocumentHeader}) doc
contents <- liftIO $ withTempDir "gitit-temp-odt" $ \tempdir -> do
let tempfile = tempdir </> page <.> "odt"
conf <- getConfig
let repoPath = case repository conf of
Git path' -> path'
Darcs path' -> path'
saveOpenDocumentAsODT tempfile repoPath openDoc
B.readFile tempfile
ok $ setContentType "application/vnd.oasis.opendocument.text" $ setFilename (page ++ ".odt") $ (toResponse noHtml) {rsBody = contents}
exportFormats :: [(String, String -> Pandoc -> Web Response)] -- (description, writer)
exportFormats = [ ("LaTeX", respondLaTeX)
, ("ConTeXt", respondConTeXt)
, ("Texinfo", respondTexinfo)
, ("reST", respondRST)
, ("MediaWiki", respondMediaWiki)
, ("man", respondMan)
, ("DocBook", respondDocbook)
, ("S5", respondS5)
, ("ODT", respondODT)
, ("RTF", respondRTF) ]
exportBox :: String -> Params -> Html
exportBox page params | isPage page =
let rev = pRevision params
in gui (urlForPage page) ! [identifier "exportbox"] <<
([ textfield "revision" ! [thestyle "display: none;", value (fromJust rev)] | isJust rev ] ++
[ select ! [name "format"] <<
map ((\f -> option ! [value f] << f) . fst) exportFormats
, submit "export" "Export" ])
exportBox _ _ = noHtml
rawContents :: String -> Params -> Web (Maybe String)
rawContents file params = do
let rev = pRevision params
fs <- getFileStore
liftIO $ catch (retrieve fs file rev >>= return . Just) (\e -> if e == NotFound then return Nothing else throwIO e)
{-
removeRawHtmlBlock :: Block -> Block
removeRawHtmlBlock (RawHtml _) = RawHtml "<!-- raw HTML removed -->"
removeRawHtmlBlock x = x
-}
readerFor :: PageType -> (String -> Pandoc)
readerFor pt = case pt of
RST -> readRST (defaultParserState { stateSanitizeHTML = True, stateSmart = True })
Markdown -> readMarkdown (defaultParserState { stateSanitizeHTML = True, stateSmart = True })
textToPandoc :: PageType -> String -> Pandoc
textToPandoc pt s = {- processPandoc removeRawHtmlBlock $ -} readerFor pt $ filter (/= '\r') s
pageAsPandoc :: String -> Params -> Web (Maybe Pandoc)
pageAsPandoc page params = do
pt <- getDefaultPageType
mDoc <- rawContents (pathForPage page) params >>= (return . liftM (textToPandoc pt))
return $ case mDoc of
Nothing -> Nothing
Just (Pandoc _ blocks) -> Just $ Pandoc (Meta [Str page] [] []) blocks
exportPage :: String -> Params -> Web Response
exportPage page params = do
let format = pFormat params
mDoc <- pageAsPandoc page params
case mDoc of
Nothing -> error $ "Unable to retrieve page contents."
Just doc -> case lookup format exportFormats of
Nothing -> error $ "Unknown export format: " ++ format
Just writer -> writer page doc
-- | Perform a function in a temporary directory and clean up.
withTempDir :: FilePath -> (FilePath -> IO a) -> IO a
withTempDir baseName = bracket (createTempDir 0 baseName) (removeDirectoryRecursive)
-- | Create a temporary directory with a unique name.
createTempDir :: Integer -> FilePath -> IO FilePath
createTempDir num baseName = do
sysTempDir <- getTemporaryDirectory
let dirName = sysTempDir </> baseName <.> show num
liftIO $ catch (createDirectory dirName >> return dirName) $
\e -> if isAlreadyExistsError e
then createTempDir (num + 1) baseName
else ioError e