amqp-utils (empty) → 0.2.1.4
raw patch · 6 files changed
+1266/−0 lines, 6 filesdep +amqpdep +basedep +bytestringsetup-changed
Dependencies added: amqp, base, bytestring, connection, containers, data-default-class, process, text, time, tls, x509-system
Files
- ChangeLog.md +5/−0
- LICENSE +674/−0
- README.md +2/−0
- Setup.hs +2/−0
- amqp-utils.cabal +52/−0
- konsum.hs +531/−0
+ ChangeLog.md view
@@ -0,0 +1,5 @@+# Revision history for haskell-amqp-utils++## 0.2.1.4 -- YYYY-mm-dd++* First version. Released on an unsuspecting world.
+ LICENSE view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ README.md view
@@ -0,0 +1,2 @@+# haskell-amqp-utils+generic Haskell AMQP consumer for use with RabbitMQ
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ amqp-utils.cabal view
@@ -0,0 +1,52 @@+name: amqp-utils++version: 0.2.1.4++synopsis: Generic Haskell AMQP Consumer++description: AMQP consumer which can+ - create a temporary queue and attach it to an exchange, or+ - attach to an existing queue;+ - display header and body info;+ - save message bodies to files;+ - call a callback script++license: GPL-3++license-file: LICENSE++author: Frank Doepper++maintainer: fd@taz.de++category: Network++build-type: Simple++extra-source-files: ChangeLog.md, README.md++cabal-version: >=1.10++Tested-With: GHC == 7.10.2, GHC == 8.0.2++executable konsum+ main-is: konsum.hs+ build-depends: base >=4.6 && <5,+ containers,+ text,+ connection,+ data-default-class,+ time,+ process,+ bytestring,+ x509-system,+ tls,+ amqp >=0.15+ + ghc-options: -threaded -Wall+ + default-language: Haskell98+ +source-repository head+ type: git+ location: git://github.com/woffs/haskell-amqp-utils
+ konsum.hs view
@@ -0,0 +1,531 @@+-- generic amqp consumer+--+-- compile:+-- ghc -O2 -threaded --make konsum.hs+--+-- run:+-- ./konsum+-- ./konsum -o amqp.example.com -p 5673 -T -k amqp-key.pem -c amqp-crt.pem -y vhost -x exchange -X./callback.sh -a -c -a callback.config.sh -f 2 routing.key.# 500+-- ./konsum -o amqp.example.com -U user -P pass -q queue -t+--+-- custom CA cert via enviroment:+-- $ env SYSTEM_CERTIFICATE_PATH=/etc/amqp/cacert.crt ./konsum -T -y vhost -x exchange+--+-- Stop with ^C++import Paths_amqp_utils ( version )+import Data.Version ( showVersion )+import System.Environment+import System.Console.GetOpt+import System.IO+import System.Process+import System.Exit+import Control.Monad+import Control.Concurrent+import qualified Control.Exception as X+import Data.List+import Data.Maybe+import qualified Data.Text as T+import qualified Data.ByteString as B+import qualified Data.Map as M+import Network.AMQP+import Network.AMQP.Types+import Network.Connection+import Network.TLS+import Network.TLS.Extra+import System.X509+import qualified Data.ByteString.Lazy.Char8 as BL+import Data.Time+import Data.Time.Clock.POSIX+import Data.Default.Class++main :: IO ()+main = do+ hr "starting"+ tid <- myThreadId+ args <- getArgs >>= parseargs+ let addiArgs = reverse $ additionalArgs args+ printparam' "client version" $ "amqp-utils " ++ (showVersion version)+ printparam' "server" $ server args+ printparam' "port" $ show $ port args+ printparam' "vhost" $ vHost args+ globalCertificateStore <- getSystemCertificateStore+ let myTLS = TLSSettings (defaultParamsClient "" B.empty)+ { clientShared = def+ { sharedValidationCache = def+ , sharedCAStore = globalCertificateStore+ }+ , clientSupported = def+ { supportedCiphers = ciphersuite_all+ }+ , clientHooks = def+ { onCertificateRequest = myCert (cert args) (key args)+ }+ }+ conn <- openConnection'' defaultConnectionOpts+ { coAuth = [ SASLMechanism (T.pack "EXTERNAL") B.empty Nothing+ , plain (T.pack (user args)) (T.pack (pass args))+ ]+ , coVHost = T.pack $ vHost args+ , coTLSSettings = if (tls args ) then Just ( TLSCustom myTLS ) else Nothing+ , coServers = [ (server args, fromIntegral $ port args) ]+ , coHeartbeatDelay = fmap fromIntegral $ heartBeat args+ }+ chan <- openChannel conn+ addChannelExceptionHandler chan+ (\exception -> closeConnection conn >>+ printparam' "exiting" (show exception) >>+ killThread tid)++ -- set prefetch+ printparam' "prefetch" $+ show $ preFetch args+ qos chan 0 (fromIntegral $ preFetch args) False++ -- attach to given queue? or build exclusive queue and bind it?+ queue <- maybe (tempQueue chan (exChange args) (bindingKey args))+ (return)+ (fmap T.pack (qName args))+ printparam' "queue name" $ T.unpack queue++ printparam "head chars" $ fmap show $ anRiss args+ printparam "temp dir" $ tempDir args+ printparam "callback" $ fileProcess args+ printparam "callback args" $ listToMaybeUnwords addiArgs++ -- subscribe to the queue+ ctag <- consumeMsgs chan+ queue+ Ack+ (myCallback (anRiss args)+ (fileProcess args)+ (tempDir args)+ addiArgs+ tid)+ printparam' "consumer tag" $ T.unpack ctag+ hr "entering main loop"++ X.catch (forever $ threadDelay 1000000)+ (\exception -> printparam' "exception" $+ show (exception :: X.SomeException))+ closeConnection conn++-- -- noop sharedValidationCache, handy when debugging+-- noValidation :: ValidationCache+-- noValidation = ValidationCache+-- (\_ _ _ -> return ValidationCachePass)+-- (\_ _ _ -> return ())++-- client certificate+myCert :: Maybe FilePath -> Maybe FilePath -> t -> IO (Maybe Credential)+myCert (Just cert') (Just key') _ = do+ result <- credentialLoadX509 cert' key'+ case result of+ Left x -> printparam' "ERROR" x >> return Nothing+ Right x -> return $ Just x+myCert _ _ _ = return Nothing++-- exclusive temp queue+tempQueue :: Channel -> String -> String -> IO T.Text+tempQueue chan xchange bkey = do+ (q, _, _) <- declareQueue chan newQueue { queueExclusive = True }+ bindQueue chan q (T.pack xchange) (T.pack bkey)+ printparam' "exchange" xchange+ printparam' "binding key" bkey+ return q++-- log cmdline options+listToMaybeUnwords :: [String] -> Maybe String+listToMaybeUnwords [] = Nothing+listToMaybeUnwords x = Just $ unwords x++-- Strings or ByteStrings with label, oder nothing at all+printwithlabel :: String -> Maybe (IO ()) -> IO ()+printwithlabel _ Nothing =+ return ()+printwithlabel labl (Just i) = do+ mapM_ putStr [ " --- ", labl, ": " ]+ i+ hFlush stdout++-- optional parameters+printparam :: String -> Maybe String -> IO ()+printparam labl ms = printwithlabel labl $+ fmap putStrLn ms++-- required parameters+printparam' :: String -> String -> IO ()+printparam' d s = printparam d (Just s)++-- head chars of body+printbody :: (String, Maybe BL.ByteString) -> IO ()+printbody (labl, ms) = printwithlabel labl $+ fmap (\s -> putStrLn "" >> BL.putStrLn s) ms++-- options for everybody+data Args = Args { server :: String+ , port :: Int+ , tls :: Bool+ , vHost :: String+ , exChange :: String+ , bindingKey :: String+ , anRiss :: Maybe Int+ , fileProcess :: Maybe String+ , qName :: Maybe String+ , cert :: Maybe String+ , key :: Maybe String+ , user :: String+ , pass :: String+ , preFetch :: Int+ , heartBeat :: Maybe Int+ , tempDir :: Maybe String+ , additionalArgs :: [String]+ }++instance Default Args where+ def = Args "localhost"+ 5672+ False+ "/"+ "default"+ "#"+ Nothing+ Nothing+ Nothing+ Nothing+ Nothing+ "guest"+ "guest"+ 1+ Nothing+ Nothing+ []++callback :: String+callback = "/usr/lib/haskell-amqp-utils/callback"++options :: [OptDescr (Args -> Args)]+options = [ Option [ 'o' ]+ [ "server" ]+ (ReqArg (\s o -> o { server = s }) "SERVER")+ ("AMQP Server (default: " ++ server def ++ ")")+ , Option [ 'y' ]+ [ "vhost" ]+ (ReqArg (\s o -> o { vHost = s }) "VHOST")+ ("AMQP Virtual Host (default: " ++ vHost def ++ ")")+ , Option [ 'x' ]+ [ "exchange" ]+ (ReqArg (\s o -> o { exChange = s }) "EXCHANGE")+ ("AMQP Exchange (default: " ++ exChange def ++ ")")+ , Option [ 'X' ]+ [ "execute" ]+ (OptArg (\s o -> o { fileProcess = Just (fromMaybe callback s)+ , tempDir = Just (fromMaybe "/tmp"+ (tempDir o))+ })+ "EXE")+ ("Callback Script File (implies -t) (-X without arg: " +++ callback ++ ")")+ , Option [ 'p' ]+ [ "port" ]+ (ReqArg (\s o -> o { port = read s }) "PORT")+ ("Server Port Number (default: " ++ show (port def) ++ ")")+ , Option [ 'T' ]+ [ "tls" ]+ (NoArg (\o -> o { tls = not (tls o) }))+ ("Toggle TLS (default: " ++ show (tls def) ++ ")")+ , Option [ 'q' ]+ [ "queue" ]+ (ReqArg (\s o -> o { qName = Just s }) "QUEUENAME")+ "Ignore Exchange and bind to existing Queue"+ , Option [ 'c' ]+ [ "cert" ]+ (ReqArg (\s o -> o { cert = Just s }) "CERTFILE")+ ("TLS Client Certificate File")+ , Option [ 'k' ]+ [ "key" ]+ (ReqArg (\s o -> o { key = Just s }) "KEYFILE")+ ("TLS Client Private Key File")+ , Option [ 'U' ]+ [ "user" ]+ (ReqArg (\s o -> o { user = s }) "USERNAME")+ ("Username for Auth")+ , Option [ 'P' ]+ [ "pass" ]+ (ReqArg (\s o -> o { pass = s }) "PASSWORD")+ ("Password for Auth")+ , Option [ 'f' ]+ [ "prefetch" ]+ (ReqArg (\s o -> o { preFetch = read s }) "INT")+ ("Prefetch count. (0=unlimited, 1=off, default: " +++ show (preFetch def) ++ ")")+ , Option [ 'r' ]+ [ "bindingkey" ]+ (ReqArg (\s o -> o { bindingKey = s }) "BINDINGKEY")+ ("AMQP binding key (default: " ++ bindingKey def ++ ")")+ , Option [ 's' ]+ [ "heartbeats" ]+ (ReqArg (\s o -> o { heartBeat = (Just (read s)) }) "INT")+ "heartbeat interval (0=disable, default: set by server)"+ , Option [ 't' ]+ [ "tempdir", "target" ]+ (OptArg (\s o -> o { tempDir = Just (fromMaybe "/tmp" s) })+ "DIR")+ "tempdir (default: no file creation, -t without arg: /tmp)"+ , Option [ 'a' ]+ [ "args" ]+ (ReqArg (\s o -> o { additionalArgs = s : (additionalArgs o)+ })+ "ARG")+ "additional argument for -X callback"+ ]++usage :: String+usage = "\n\+ \amqp-utils " +++ (showVersion version) +++ "\n\n\+ \Usage:\n\+ \konsum [options] [bindingkey] [body byte count to show]\n\n\+ \Options:"++-- special options+parsearg :: Args -> String -> Args+parsearg args arg+ -- binding keys+ | elem '.' arg = args { bindingKey = arg }+ | elem '#' arg = args { bindingKey = arg }+ | elem '*' arg = args { bindingKey = arg }+ -- number -> show how many bytes+ | all (flip elem ['0' .. '9']) arg =+ args { anRiss = Just (read arg :: Int) }+ | otherwise = args++-- apply both options and parsearg onto argstring+parseargs :: [String] -> IO Args+parseargs argstring = case getOpt Permute options argstring of+ (o, n, []) -> return $ foldl parsearg (foldl (flip id) def o) n+ (_, _, errs) -> ioError $ userError $ concat errs ++ usageInfo usage options++-- process received message+myCallback :: Maybe Int+ -> Maybe String+ -> Maybe String+ -> [String]+ -> ThreadId+ -> (Message, Envelope)+ -> IO ()+myCallback anR filePr tempD addi tid m@(_, envi) = do+ let numstring = show $ envDeliveryTag envi+ hr $ "BEGIN " ++ numstring+ now <- getZonedTime+ callbackoptions <- printmsg m anR now+ either (\e -> printparam' "ERROR" (show (e :: X.SomeException)) >>+ rejectEnv envi True)+ return+ =<< X.try (optionalFileStuff m+ callbackoptions+ addi+ numstring+ tempD+ filePr+ tid)+ hr $ "END " ++ numstring++-- if the message is to be saved+-- and maybe processed further+optionalFileStuff :: (Message, Envelope)+ -> [String]+ -> [String]+ -> String+ -> Maybe String+ -> Maybe String+ -> ThreadId+ -> IO ()+optionalFileStuff (msg, envi) callbackoptions addi numstring tempD filePr tid = do+ path <- saveFile tempD numstring (msgBody msg)+ printparam "saved to" path+ let callbackcmdline = liftM2 (constructCallbackCmdLine callbackoptions+ addi+ numstring)+ filePr+ path+ printparam "calling" $ fmap unwords callbackcmdline+ maybe (ackEnv envi)+ (\c -> forkFinally (doProc numstring envi c)+ (either (throwTo tid) return) >>+ return ())+ callbackcmdline++-- save message into temp file+saveFile :: Maybe String -> String -> BL.ByteString -> IO (Maybe String)+saveFile Nothing _ _ = return Nothing+saveFile (Just tempD) numstring body = do+ (p, h) <- openBinaryTempFileWithDefaultPermissions tempD+ ("konsum-" +++ numstring ++ "-.tmp")+ BL.hPut h body+ hClose h+ return $ Just p++-- construct cmdline for callback script+constructCallbackCmdLine :: [String]+ -> [String]+ -> String+ -> String+ -> String+ -> [String]+constructCallbackCmdLine opts addi num exe path =+ exe : "-f" : path : "-n" : num : opts ++ addi++-- call callback script+doProc :: String -> Envelope -> [String] -> IO ()+doProc numstring envi (exe : args) = do+ (_, _, _, processhandle) <- createProcess (proc exe args) { std_out = Inherit+ , std_err = Inherit+ }+ exitcode <- waitForProcess processhandle+ printparam' (numstring ++ " call returned") $ show exitcode+ case exitcode of+ ExitSuccess -> ackEnv envi+ ExitFailure _ -> rejectEnv envi True+doProc _ _ _ = return ()++-- log marker+hr :: String -> IO ()+hr x = putStrLn hr' >> hFlush stdout+ where+ hr' = take 72 $ (take 25 hr'') ++ " " ++ x ++ " " ++ hr''+ hr'' = repeat '-'++formatheaders :: ((T.Text, FieldValue) -> [a]) -> FieldTable -> [a]+formatheaders f (FieldTable ll) =+ concat $ map f $ M.toList ll++-- log formatting+fieldshow :: (T.Text, FieldValue) -> String+fieldshow (k, v) = "\n " ++ T.unpack k ++ ": " ++ valueshow v++-- callback cmdline formatting+fieldshow' :: (T.Text, FieldValue) -> [String]+fieldshow' (k, v) = [ "-h", T.unpack k ++ "=" ++ valueshow v ]++-- showing a FieldValue+valueshow :: FieldValue -> String+valueshow (FVString value) =+ T.unpack value+valueshow (FVInt32 value) =+ show value+valueshow value = show value++-- skip showing body head if binary type+isimage :: Maybe String -> Bool+isimage Nothing = False+isimage (Just ctype)+ | isPrefixOf "application/xml" ctype =+ False+ | isPrefixOf "application/json" ctype =+ False+ | otherwise = any (flip isPrefixOf ctype) [ "application", "image" ]++-- show the first bytes of message body+anriss' :: Maybe Int -> BL.ByteString -> BL.ByteString+anriss' x = case x of+ Nothing -> id+ Just y -> BL.take (fromIntegral y)++-- callback cmdline with optional parameters+printopt :: (String, Maybe String) -> [String]+printopt (_, Nothing) = []+printopt (opt, Just s) =+ [ opt, s ]++-- prints header and head on STDOUT and returns cmdline options to callback+printmsg :: (Message, Envelope) -> Maybe Int -> ZonedTime -> IO [String]+printmsg (msg, envi) anR now = do+ mapM_ (uncurry printparam)+ [ ("routing key", rkey)+ , ("message-id", messageid)+ , ("headers", headers)+ , ("content-type", contenttype)+ , ("content-encoding", contentencoding)+ , ("redelivered", redeliv)+ , ("timestamp", timestamp'')+ , ("time now", now')+ , ("size", size)+ , ("priority", prio)+ , ("type", mtype)+ , ("user id", muserid)+ , ("application id", mappid)+ , ("cluster id", mclusterid)+ , ("reply to", mreplyto)+ , ("correlation id", mcorrid)+ , ("expiration", mexp)+ , ("delivery mode", mdelivmode)+ ]+ printbody (label, anriss)+ return $+ concat (map printopt+ [ ("-r", rkey)+ , ("-m", contenttype)+ , ("-e", contentencoding)+ , ("-i", messageid)+ , ("-t", timestamp)+ , ("-p", prio)+ ] +++ maybeToList headers')+ where+ headers = fmap (formatheaders fieldshow) $ msgHeaders msg+ headers' = fmap (formatheaders fieldshow') $ msgHeaders msg+ body = msgBody msg+ anriss = if isimage contenttype+ then Nothing+ else Just (anriss' anR body) :: Maybe BL.ByteString+ anriss'' = maybe "" (\a -> "first " ++ (show a) ++ " bytes of ") anR+ label = anriss'' ++ "body"+ contenttype = fmap T.unpack $ msgContentType msg+ contentencoding = fmap T.unpack $ msgContentEncoding msg+ rkey = Just . T.unpack $ envRoutingKey envi+ messageid = fmap T.unpack $ msgID msg+ prio = fmap show $ msgPriority msg+ mtype = fmap show $ msgType msg+ muserid = fmap show $ msgUserID msg+ mappid = fmap show $ msgApplicationID msg+ mclusterid = fmap show $ msgClusterID msg+ mreplyto = fmap show $ msgReplyTo msg+ mcorrid = fmap show $ msgCorrelationID msg+ mexp = fmap show $ msgExpiration msg+ mdelivmode = fmap show $ msgDeliveryMode msg+ size = Just . show $ BL.length body+ redeliv = if envRedelivered envi then Just "YES" else Nothing+ tz = zonedTimeZone now+ nowutc = zonedTimeToUTCFLoor now+ msgtime = msgTimestamp msg+ msgtimeutc = fmap (posixSecondsToUTCTime . realToFrac) msgtime+ timestamp = fmap show msgtime+ timediff = fmap (difftime nowutc) msgtimeutc+ now' = case timediff of+ Just "now" -> Nothing+ _ -> showtime tz $ Just nowutc+ timestamp' = showtime tz msgtimeutc+ timestamp'' = liftM3 (\a b c -> a ++ " (" ++ b ++ ") (" ++ c ++ ")")+ timestamp+ timestamp'+ timediff++zonedTimeToUTCFLoor :: ZonedTime -> UTCTime+zonedTimeToUTCFLoor x = posixSecondsToUTCTime $+ realToFrac ((floor .+ utcTimeToPOSIXSeconds .+ zonedTimeToUTC) x :: Timestamp)++showtime :: TimeZone -> Maybe UTCTime -> Maybe String+showtime tz = fmap (show . (utcToZonedTime tz))++difftime :: UTCTime -> UTCTime -> String+difftime now msg+ | now == msg = "now"+ | now > msg = diff ++ " ago"+ | otherwise = diff ++ " in the future"+ where+ diff = show (diffUTCTime now msg)