stderr,
stdout )
import System.IO.Error (catchIOError)
-import System.Log.Logger ( getLogger, rootLoggerName, saveGlobalLogger )
import System.Timeout (timeout)
import CommandLine (get_args)
import qualified OptionalConfiguration as OC (
OptionalConfiguration(..),
from_rc )
-import Terminal (putGreenLn)
+import Terminal (
+ display_debug,
+ display_error,
+ display_info,
+ display_sent,
+ display_warning )
import TSN.FeedHosts (FeedHosts(..))
import TSN.Xml (parse_xmlfid, xml_prologue)
+-- | Warning! This does not automatically append a newline. The output
+-- is displayed/logged as-is, for, you know, debug purposes.
+report_debug :: String -> IO ()
+report_debug s = do
+ display_debug s
+ log_debug s
+
+report_error :: String -> IO ()
+report_error s = do
+ display_error $ "ERROR: " ++ s
+ log_error s
+
+report_info :: String -> IO ()
+report_info s = do
+ display_info s
+ log_info s
+
+-- | Warning! This does not automatically append a newline.
+report_sent :: String -> IO ()
+report_sent s = do
+ display_sent s
+ log_debug s
+
+report_warning :: String -> IO ()
+report_warning s = do
+ display_warning $ "WARNING: " ++ s
+ log_warning s
+
+
-- | Receive a single line of text from a Handle, and send it to the
-- debug log.
--
recv_line :: Handle -> IO String
recv_line h = do
line <- hGetLine h
- log_debug line
+ report_debug (line ++ "\n")
return line
save_document cfg doc =
case maybe_path of
Nothing ->
- log_error "Document missing XML_File_ID element."
+ report_error "Document missing XML_File_ID element."
Just path -> do
already_exists <- doesFileExist path
when already_exists $ do
let msg = "File " ++ path ++ " already exists, overwriting."
- log_warning msg
+ report_warning msg
writeFile path doc
- log_info $ "Wrote file: " ++ path ++ "."
+ report_info $ "Wrote file: " ++ path ++ "."
where
xmlfid = fmap show (parse_xmlfid doc)
filename = fmap (++ ".xml") xmlfid
-- of its lines into one big string.
let document = concat $ reverse buffer
save_document cfg document
- loop cfg h [line] -- empty the buffer before looping again
+ loop cfg h [line] -- Empty the buffer before looping again.
else
- -- append line to the head of the buffer and loop
+ -- Append line to the head of the buffer and loop.
loop cfg h (line : buffer)
prompt1 <- recv_prompt h
if prompt1 /= username_prompt then
- log_error "Didn't receive username prompt."
+ report_error "Didn't receive username prompt."
else do
send_line h (username cfg)
prompt2 <- recv_prompt h
if prompt2 /= password_prompt then
- log_error "Didn't receive password prompt."
+ report_error "Didn't receive password prompt."
else do
send_line h (password cfg)
_ <- recv_line h -- "The Sports Network"
send_line :: Handle -> String -> IO ()
send_line h' s = do
- hPutStr h' (s ++ "\r\n")
- putGreenLn s
+ let line = s ++ "\r\n"
+ hPutStr h' line
+ display_sent line
recv_chars :: Int -> Handle -> IO String
recv_chars n h' = do
s <- sequence [ hGetChar h' | _ <- [1..n] ]
- putStr s
+ report_debug s
return s
recv_prompt :: Handle -> IO String
recv_prompt = recv_chars 10
+
connect_and_loop :: Configuration -> String -> IO ()
connect_and_loop cfg host = do
- log_info $ "Connecting to " ++ host ++ "..."
+ report_info $ "Connecting to " ++ host ++ "..."
bracket acquire_handle release_handle action
return ()
where
--
login_worked <- timeout five_seconds $ log_in cfg h
case login_worked of
- Nothing -> log_info "Login timed out (5s)."
+ Nothing -> report_info "Login timed out (5s)."
Just _ -> loop cfg h []
-- | The entry point of the program.
main :: IO ()
main = do
- init_logging
- root_logger <- getLogger rootLoggerName
- saveGlobalLogger root_logger
-
rc_cfg <- OC.from_rc
cmd_cfg <- get_args
-- prefering the command-line ones.
let opt_config = rc_cfg <> cmd_cfg
- -- This is necessary because if the user specifies an empty list of
+ -- Update a default config with any options that have been set in
+ -- either the config file or on the command-line. We initialize
+ -- logging before the missing parameter checks below so that we can
+ -- log the errors.
+ let cfg = (def :: Configuration) `merge_optional` opt_config
+ init_logging (syslog cfg)
+
+ -- Check the optional config for missing required options. This is
+ -- necessary because if the user specifies an empty list of
-- hostnames in e.g. the config file, we want to bail rather than
- -- fall back on the default list (which gets merged from a
- -- Configuration below).
+ -- fall back on the default list (which was merged from a default
+ -- Configuration above).
when (null $ get_feed_hosts (OC.feed_hosts opt_config)) $ do
- log_error "No feed hosts supplied."
+ report_error "No feed hosts supplied."
exitWith (ExitFailure exit_no_feed_hosts)
when (isNothing (OC.password opt_config)) $ do
- log_error "No password supplied."
+ report_error "No password supplied."
exitWith (ExitFailure exit_no_password)
when (isNothing (OC.username opt_config)) $ do
- log_error "No username supplied."
+ report_error "No username supplied."
exitWith (ExitFailure exit_no_username)
- -- Finally, update a default config with any options that have been
- -- set in either the config file or on the command-line.
- let cfg = (def :: Configuration) `merge_optional` opt_config
-
-- This may be superstition (and I believe stderr is unbuffered),
-- but it can't hurt.
hSetBuffering stderr NoBuffering
round_robin cfg feed_host_idx = do
let hosts = get_feed_hosts $ feed_hosts cfg
let host = hosts !! feed_host_idx
- catchIOError (connect_and_loop cfg host) (log_error . show)
+ catchIOError (connect_and_loop cfg host) (report_error . show)
thread_sleep 10 -- Wait 10s before attempting to reconnect.
round_robin cfg $ (feed_host_idx + 1) `mod` (length hosts)
projects / dead / htsn.git / blobdiff