-- Copyright (C) 2010 John Millikin <jmillikin@gmail.com>
--
-- 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 3 of the License, or
-- 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, see <http://www.gnu.org/licenses/>.
{-# LANGUAGE OverloadedStrings #-}
module Network.Protocol.XMPP.Connections
( Server (..)
, xmlHeader
, startOfStream
, qnameStream
) where
import Network (HostName, PortID)
import Data.ByteString (ByteString)
import qualified Data.Text as T
import Data.Text.Encoding (encodeUtf8)
import qualified Text.XML.HXT.DOM.Interface as DOM
import qualified Text.XML.LibXML.SAX as SAX
import Network.Protocol.XMPP.JID (JID, formatJID)
import Network.Protocol.XMPP.XML (qname, convertQName)
data Server = Server
{ serverJID :: JID
, serverHostname :: HostName
, serverPort :: PortID
}
-- Since only the opening tag should be written, normal XML
-- serialization cannot be used. Be careful to escape any embedded
-- attributes.
xmlHeader :: T.Text -> JID -> ByteString
xmlHeader ns jid = encodeUtf8 header where
escape = T.pack . DOM.attrEscapeXml . T.unpack
attr x = T.concat ["\"", escape x, "\""]
header = T.concat
[ "<?xml version='1.0'?>\n"
, "<stream:stream xmlns=" , attr ns
, " to=", attr (formatJID jid)
, " version=\"1.0\""
, " xmlns:stream=\"http://etherx.jabber.org/streams\">"
]
startOfStream :: Int -> SAX.Event -> Bool
startOfStream depth event = case (depth, event) of
(1, (SAX.BeginElement elemName _)) ->
qnameStream == convertQName elemName
_ -> False
qnameStream :: DOM.QName
qnameStream = qname "http://etherx.jabber.org/streams" "stream"