getContents,
pack,
words )
-import Data.List ( (\\), intersperse )
+import Data.List ( (\\), intercalate, sort )
import Network.DNS (
+ DNSError(NameError),
Domain,
FileOrNumericHost(RCHostName),
ResolvConf(resolvInfo, resolvTimeout),
-> LookupResult
-> IO ()
--- If the lookup resulted in a DNS error, we just ignore the whole
--- thing.
-report _ _ (_, Left _) = return ()
-
-- If the lookup succeeded but there were no results, report that the
--- domain is not delegated.
-report _ _ (d, Right []) =
+-- domain is not delegated. Note that the behavior of the DNS library
+-- changed with regard to this at some point: we used to get back
+-- a "success," but with an empty list of results. Now a NameError
+-- (which is not actually an error!) is returned.
+report _ _ (d, Left NameError) =
putStrLn $ "Domain " ++ (show d) ++ " not delegated."
+-- If the lookup resulted in some other DNS error, we just ignore the
+-- whole thing.
+report _ _ (_, Left _) = return ()
+
-- Otherwise, subtract our delegates from the list of results and
-- report the leftovers.
report delgts normalize_function (d, Right raw_hosts) = do
let nrml_hosts = map normalize_function raw_hosts
- let leftovers = nrml_hosts \\ delgts
+ -- Sort the leftovers so that we can test the expected output.
+ let leftovers = sort (nrml_hosts \\ delgts)
unless (null leftovers) $
putStrLn $ "Domain " ++
(show d) ++
-- Create one big string by joining together a list of smaller
-- strings and placing a delimiter between them.
join :: String -> [String] -> String
- join delimiter strings = concat (intersperse delimiter strings)
+ join delimiter strings = intercalate delimiter strings
main :: IO ()
results <- parallelInterleaved actions
-- Output the results.
- _ <- mapM (report nrml_delegates normalize_function) results
+ mapM_ (report nrml_delegates normalize_function) results
stopGlobalPool