X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=blobdiff_plain;f=Network%2FHTTP%2FLucu%2FHttpd.hs;h=2dca5120d8c6e0e21f40b88a03959d4017c848d4;hb=0aa4f6d758fc12fba468f7cd399bbcc48f693d1e;hp=2be87368b4b436d2d16c8e0c43b044b69ecdda67;hpb=c6b11025d1f81c668e9995e856b7bb34175230d3;p=Lucu.git

diff --git a/Network/HTTP/Lucu/Httpd.hs b/Network/HTTP/Lucu/Httpd.hs
index 2be8736..2dca512 100644
--- a/Network/HTTP/Lucu/Httpd.hs
+++ b/Network/HTTP/Lucu/Httpd.hs
@@ -1,32 +1,114 @@
+{-# LANGUAGE
+    UnicodeSyntax
+  #-}
+-- |The entry point of Lucu httpd.
 module Network.HTTP.Lucu.Httpd
-    ( runHttpd        -- Config -> ResTree -> IO ()
+    ( FallbackHandler
+    , runHttpd
     )
     where
+import Control.Concurrent
+import Control.Exception
+import Control.Monad
+import Control.Monad.Unicode
+import Data.Maybe
+import Network.BSD
+import Network.Socket
+import Network.HTTP.Lucu.Config
+import Network.HTTP.Lucu.Interaction
+import Network.HTTP.Lucu.RequestReader
+import Network.HTTP.Lucu.Resource.Tree
+import Network.HTTP.Lucu.ResponseWriter
+import Network.HTTP.Lucu.SocketLike as SL
+import System.Posix.Signals
 
-import           Control.Concurrent
-import           Control.Concurrent.STM
-import qualified Data.ByteString.Lazy.Char8 as B
-import           Data.ByteString.Lazy.Char8 (ByteString)
-import           Network
-import           Network.HTTP.Lucu.Config
-import           Network.HTTP.Lucu.Interaction
-import           Network.HTTP.Lucu.RequestReader
-import           Network.HTTP.Lucu.Resource
-import           Network.HTTP.Lucu.Resource.Tree
-import           Network.HTTP.Lucu.ResponseWriter
-import           System.IO
-
-
-runHttpd :: Config -> ResTree -> IO ()
-runHttpd cnf table
+-- |This is the entry point of Lucu httpd. It listens to a socket and
+-- waits for clients. 'runHttpd' never stops by itself so the only way
+-- to stop it is to raise an exception in the thread running it.
+--
+-- Note that 'runHttpd' automatically makes SIGPIPE be ignored by
+-- calling @'installHandler' 'sigPIPE' 'Ignore' 'Nothing'@. This can
+-- hardly cause a problem though.
+--
+-- Example:
+--
+-- > {-# LANGUAGE OverloadedStrings #-}
+-- > module Main where
+-- > import Network.HTTP.Lucu
+-- > 
+-- > main :: IO ()
+-- > main = let config    = defaultConfig
+-- >            resources = mkResTree [ ([], helloWorld) ]
+-- >        in
+-- >          runHttpd config resourcees []
+-- >
+-- > helloWorld :: ResourceDef
+-- > helloWorld = emptyResource {
+-- >                resGet
+-- >                  = Just $ do setContentType $ mkMIMEType "text" "plain"
+-- >                              putChunk "Hello, world!"
+-- >              }
+runHttpd ∷ Config → ResTree → [FallbackHandler] → IO ()
+runHttpd cnf tree fbs
     = withSocketsDo $
-      do so <- listenOn (cnfServerPort cnf)
-         loop so
+      do void $ installHandler sigPIPE Ignore Nothing
+         let launchers
+                 = catMaybes
+                   [ do scnf ← cnfSSLConfig    cnf
+                        addr ← cnfServerV4Addr cnf
+                        return ( do so ← listenOn AF_INET addr (sslServerPort scnf)
+                                    launchListener (sslContext scnf, so)
+                               )
+                   , do scnf ← cnfSSLConfig    cnf
+                        addr ← cnfServerV6Addr cnf
+                        return ( do so ← listenOn AF_INET6 addr (sslServerPort scnf)
+                                    launchListener (sslContext scnf, so)
+                               )
+                   , do addr ← cnfServerV4Addr cnf
+                        return ( launchListener =≪ listenOn AF_INET addr (cnfServerPort cnf)
+                               )
+                   , do addr ← cnfServerV6Addr cnf
+                        return ( launchListener =≪ listenOn AF_INET6 addr (cnfServerPort cnf)
+                               )
+                   ]
+         sequence_ launchers
+         waitForever
     where
-      loop :: Socket -> IO ()
-      loop so
-          = do (h, host, _) <- accept so
-               tQueue       <- newInteractionQueue
-               readerTID    <- forkIO $ requestReader cnf table h host tQueue
-               writerTID    <- forkIO $ responseWriter cnf h tQueue readerTID
-               loop so
+      launchListener ∷ SocketLike s ⇒ s → IO ()
+      launchListener so
+          = do p ← SL.socketPort so
+               -- FIXME: Don't throw away the thread ID as we can't
+               -- kill it later then. [1]
+               void $ forkIO $ httpLoop p so
+
+      listenOn ∷ Family → HostName → ServiceName → IO Socket
+      listenOn fam host srv
+          = do proto ← getProtocolNumber "tcp"
+               let hints = defaultHints {
+                             addrFlags      = [AI_PASSIVE]
+                           , addrFamily     = fam
+                           , addrSocketType = Stream
+                           , addrProtocol   = proto
+                           }
+               addrs ← getAddrInfo (Just hints) (Just host) (Just srv)
+               let addr = head addrs
+               bracketOnError
+                   (socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr))
+                   sClose
+                   (\ sock →
+                        do setSocketOption sock ReuseAddr 1
+                           bindSocket sock (addrAddress addr)
+                           listen sock maxListenQueue
+                           return sock
+                   )
+
+      httpLoop ∷ SocketLike s ⇒ PortNumber → s → IO ()
+      httpLoop port so
+          = do (h, addr)  ← SL.accept so
+               tQueue     ← newInteractionQueue
+               readerTID  ← forkIO $ requestReader cnf tree fbs h port addr tQueue
+               _writerTID ← forkIO $ responseWriter cnf h tQueue readerTID
+               httpLoop port so
+
+      waitForever ∷ IO ()
+      waitForever = forever (threadDelay 1000000)