-
-
Notifications
You must be signed in to change notification settings - Fork 226
/
Gitit.hs
1200 lines (1080 loc) · 60.7 KB
/
Gitit.hs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
{-# 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 Gitit.Util (withTempDir, orIfNull, consolidateHeads)
import Gitit.Initialize (createStaticIfMissing, createRepoIfMissing)
import System.IO.UTF8
import System.IO (stderr)
import Control.Exception (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 Gitit.Config (getConfigFromOpts)
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 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
main :: IO ()
main = do
-- parse options to get config file
conf <- getConfigFromOpts
-- 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 liftM (M.fromList . read) $ readFile $ userFile conf
else return M.empty
-- create template file if it doesn't exist
let templatefile = templateFile conf
templateExists <- doesFileExist templatefile
unless templateExists $ do
templatePath <- getDataFileName $ "data" </> "template.html"
copyFile templatePath templatefile
hPutStrLn stderr $ "Created " ++ templatefile
-- read template file
templ <- liftM T.newSTMP $ liftIO $ readFile templatefile
-- initialize state
initializeAppState conf users' templ
-- setup the page repository and static files, if they don't exist
createRepoIfMissing conf
let staticdir = staticDir conf
createStaticIfMissing staticdir
-- start the server
hPutStrLn stderr $ "Starting server on port " ++ show (portNumber conf)
tid <- forkIO $ simpleHTTP (Conf { validator = Nothing, port = portNumber conf }) $
map (\d -> dir d [ withExpiresHeaders $ fileServe [] $ staticdir </> d]) ["css", "img", "js"] ++
[ debugHandler | debugMode conf ] ++
[ filterIf acceptsZip gzipBinary $ multi wikiHandlers ]
waitForTermination
-- shut down the server
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 ++ "\""
type Handler = ServerPart Response
debugHandler :: Handler
debugHandler = do
liftIO $ putStr "\n"
withRequest $ \req -> liftIO $ getCurrentTime >>= (putStrLn . formatDateTime "%c") >> putStrLn (show req)
multi [ handle (const True) GET showParams, handle (const True) POST showParams ]
where showParams page params = do
liftIO $ putStrLn page >> putStrLn (show params)
noHandle
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
sessionTime :: Int
sessionTime = 60 * 60 -- session will expire 1 hour after page request
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)
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.")
, (takeExtension wikiname == ".page",
"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
-- | 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.
convertWikiLinks :: Inline -> Inline
convertWikiLinks (Link ref ("", "")) =
Link ref (refToUrl ref, "Go to wiki page")
convertWikiLinks x = x
refToUrl :: [Inline] -> String
refToUrl = concatMap go
where go (Str x) = x
go (Space) = "%20"
go (Quoted DoubleQuote xs) = '"' : (refToUrl xs ++ "\"")
go (Quoted SingleQuote xs) = '\'' : (refToUrl xs ++ "'")
go (Apostrophe) = "'"
go (Ellipses) = "..."
go (Math InlineMath t) = '$' : (t ++ "$")
go _ = ""
-- | 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