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|
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ViewPatterns #-}
module XMPPServer ( listenForXmppClients ) where
import Data.HList.TypeEqGeneric1()
import Data.HList.TypeCastGeneric1()
import ByteStringOperators
import Server
import Data.ByteString.Lazy.Char8 as L
( ByteString
, hPutStrLn
, unlines
, pack
, unpack
, init )
import qualified Data.ByteString.Lazy.Char8 as L
( putStrLn )
import System.IO
( Handle
)
import Control.Concurrent (forkIO)
import Control.Concurrent.Chan
import Data.HList
import AdaptServer
import Text.XML.HaXml.Lex (xmlLex)
import Text.XML.HaXml.Parse (xmlParseWith,element,doctypedecl,processinginstruction,elemOpenTag,elemCloseTag)
import Text.XML.HaXml.Types as Hax (ElemTag,QName(..),Namespace(..),Element(..),Content(..),AttValue(..))
import qualified Text.XML.HaXml.Types as Hax (Element)
import Data.Maybe
import Debug.Trace
greet host = L.unlines
[ "<?xml version='1.0'?>"
, "<stream:stream"
, "from='" <++> host <++> "'"
, "id='someid'"
, "xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>"
, "<stream:features>"
, " <bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>"
{-
-- , " <session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>"
, " <mechanisms xmlns='urn:ietf:params:xml:ns:xmpp-sasl'>"
-- , " <mechanism>DIGEST-MD5</mechanism>"
, " <mechanism>PLAIN</mechanism>"
, " </mechanisms> "
-}
, "</stream:features>"
]
startCon st = do
let h = hOccursFst st :: Handle
return (ConnectionFinalizer (return ()) .*. st)
iq_query_unavailable host id mjid xmlns = L.unlines $
[ "<iq type='error'"
, " from='" <++> host <++> "'"
, case mjid of Just jid -> " to='" <++> jid <++> "'"
Nothing -> ""
, " id='" <++> id <++> "'>"
, " <query xmlns='" <++> xmlns <++> "'/>"
, " <error type='cancel'>"
, " <service-unavailable"
, " xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>"
, " </error>"
, "</iq>"
]
tagattrs tag content = Prelude.concatMap (\(CElem (Elem _ a _) _)->a)
$ Prelude.filter (bindElem tag) content
bindElem tag (CElem (Elem (N n) _ _) _) | n==tag = True
bindElem _ _ = False
hasElem tag content =
not . Prelude.null . Prelude.filter (bindElem tag) $ content
unattr (AttValue as) = listToMaybe $ Prelude.concatMap left as
where left (Left x) = [x]
left _ = []
astring (AttValue [Left s]) = [s]
tagcontent tag content = Prelude.concatMap (\(CElem (Elem _ _ c) _)->c)
$ Prelude.filter (bindElem tag) content
iqresult host id (Just rsrc) = L.unlines $
[ "<iq type='result' id='" <++> id <++> "'>"
, "<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>"
, "<jid>" <++> id <++> "@" <++> host <++> "/" <++> rsrc <++> "</jid>"
, "</bind>"
, "</iq> "
]
iqresult host id Nothing = L.unlines $
[ "<iq type='result'"
, " id='" <++> id <++> "'"
, " from='" <++> host <++> "'"
, " /> "
]
iqresult_info host id mjid = L.unlines $
[ "<iq type='result'"
, " from='" <++> host <++> "'"
, case mjid of Just jid -> " to='" <++> jid <++> "'"
Nothing -> ""
, " id='" <++> id <++> "'>"
, " <query xmlns='http://jabber.org/protocol/disco#info'>"
, " <identity"
, " category='server'"
, " type='im'"
, " name='" <++> host <++> "'/>"
, " <feature var='http://jabber.org/protocol/disco#info'/>"
, " <feature var='http://jabber.org/protocol/disco#items'/>"
, " </query>"
, "</iq>"
]
iqresponse host (Elem _ attrs content) = do
id <- fmap pack (lookup (N "id") attrs >>= unattr)
typ <- fmap pack (lookup (N "type") attrs >>= unattr)
case typ of
"set" -> do
let string (CString _ s _) = [s]
mplus (do
rsrc <- listToMaybe . Prelude.concatMap string . tagcontent "resource" . tagcontent "bind" $ content
Just $ iqresult host id (Just (pack rsrc)) )
(do
guard (hasElem "session" content)
Just (iqresult host id Nothing))
"get" -> trace ("iq-get "++show (attrs,content)) $ do
xmlns <- fmap pack $
lookup (N "xmlns") (tagattrs "query" content)
>>= listToMaybe . astring
Just (iq_query_unavailable host id Nothing xmlns)
_ -> Nothing
doCon st elem cont = do
let h = hOccursFst st :: Handle
host = "localhost"
hsend r = do
hPutStrLn h r
L.putStrLn $ "SENT:\n" <++> r
case elem of
OpenTag _ ->
hsend (greet host)
Element e@(Elem (N "iq") _ _) ->
case iqresponse host e of
Nothing -> trace "no respones" $ return ()
Just r -> hsend r
_ -> return () -- putStrLn $ "unhandled: "++show v
putStrLn (show elem)
cont ()
instance Show Hax.ElemTag where
show _ = "elemtag"
data XmppObject e i t c
= Element e
| ProcessingInstruction i
| OpenTag t
| CloseTag c
deriving Show
streamName = QN (Namespace {nsPrefix= "stream" , nsURI="http://etherx.jabber.org/streams" }) "stream"
xmppParse ls =
case xmlParseWith element ls of
(Right e,rs) -> (Right (Element e), rs)
(Left _,_) ->
case xmlParseWith elemOpenTag ls of
(Right e,rs) -> (Right (OpenTag e),rs)
(Left _,_) ->
case xmlParseWith (elemCloseTag streamName) ls of
(Right e,rs) -> (Right (CloseTag e),rs)
(Left _,_) ->
case xmlParseWith processinginstruction ls of
(Right e,rs) -> (Right (ProcessingInstruction e),rs)
(Left err,rs) -> (Left err,rs)
listenForXmppClients port st = do
let (start,dopkt) =
adaptServer ( xmlLex "stream" . unpack
, xmppParse)
(startCon,doCon)
doServer (port .*. st)
dopkt
start
|
