From 85243e63a2317c5839afec01d9ef7fcb1eb1a0aa Mon Sep 17 00:00:00 2001 From: rnhmjoj Date: Sun, 14 May 2017 04:32:42 +0200 Subject: [PATCH] rewrite from scratch --- LICENSE | 689 ++++++++++++++++++++++++++++++++++++++++-- Main.hs | 185 +++++++++--- namecoin-update.cabal | 6 +- 3 files changed, 824 insertions(+), 56 deletions(-) diff --git a/LICENSE b/LICENSE index fbc8b8f..10926e8 100644 --- a/LICENSE +++ b/LICENSE @@ -1,20 +1,675 @@ -Copyright (c) 2015 rnhmjoj + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. -The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software. + 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. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/Main.hs b/Main.hs index 48e6281..ac03c39 100644 --- a/Main.hs +++ b/Main.hs @@ -1,53 +1,166 @@ -{-# Language TemplateHaskell, RecordWildCards #-} +-- | Tool to keep namecoin names updated and well +module Main where -import System.Process -import System.Exit -import System.Environment (getArgs) -import Data.Maybe (listToMaybe, fromMaybe) +import Control.Applicative (many, (<|>)) +import Control.Monad (when) +import Control.Lens (set, view) +import Control.Exception (try, SomeException) +import Prelude hiding (error, readFile) +import Data.Attoparsec.Text hiding (try) +import Data.Maybe (fromJust) +import Data.Text (Text, unpack) +import Data.Text.IO (readFile) import Data.Aeson import Data.Aeson.TH -import Data.ByteString.Lazy.Char8 (pack) -import Control.Exception (try) +import System.Environment (getArgs) +import Network.Wreq -data Name = Name - { name :: String - , value :: String - , expires_in :: Int + +-- | Alias for types with an error message +type Error = Either String + + +-- * Namecoin config parser + +-- | Parse a comment (line beggining with a "#") +comment :: Parser () +comment = do + char '#' >> takeTill isEndOfLine + endOfLine + return () + +-- | Parse an option of form +-- +-- > key=value +setting :: Parser (Text, Text) +setting = do + name <- takeTill (== '=') + char '=' + value <- takeTill isEndOfLine + endOfLine + return (name, value) + +-- | Parse a line (either a comment or an option) +line :: Parser (Text, Text) +line = (comment >> line) <|> setting + +-- | Parse the namecoin config format +config :: Parser [(Text, Text)] +config = many line + +-- | Takes the content of a namecoin config file +-- and gives the URI to connect to the JSON-RPC server +uri :: Text -> Error String +uri content = do + dict <- parseOnly config content + username <- get dict "rpcuser" + password <- get dict "rpcpassword" + address <- get dict "rpcbind" + port <- get dict "rpcport" + return ("http://"++username++":"++password++"@"++address++":"++port) + where + get dict key = maybe (missing key) (Right . unpack) (lookup key dict) + missing key = Left ("option '"++unpack key++"' is missing.") + + +-- * JSON-RPC client + +-- | JSON-RPC 1.0 request record +data RPCRequest = RPCRequest + { id :: String -- ^ a string identificating the client + , method :: String -- ^ the name of the method + , params :: [String] -- ^ a list of parameters for the method } +-- | JSON-RPC 1.0 response record +data RPCResponse = RPCResponse + { id :: String -- ^ the same identificative string + , result :: Maybe RPCResult -- ^ result if the method call succeded + , error :: Maybe RPCError -- ^ error in case the method call failed + } + +-- | Namecoin API error record +data RPCError = RPCError + { code :: String -- ^ a number indicating the kind of error + , message :: String -- ^ a detailed explanation of the error + } + +-- | Namecoin API Value record +data Name = Name + { name :: String -- ^ the namecoin name + , value :: String -- ^ its value + , expires_in :: Int -- ^ number of blocks before the name expires + } + +-- | Namecoin API result type +type RPCResult = [Name] + +deriveJSON defaultOptions ''RPCRequest +deriveJSON defaultOptions ''RPCResponse +deriveJSON defaultOptions ''RPCError deriveJSON defaultOptions ''Name +-- | Execute an RPC method +rpcRequest + :: String -- ^ the URI of the JSON-RPC endpoint + -> String -- ^ the method name + -> [String] -- ^ the method parameters + -> IO (Error RPCResult) -- ^ and error or the wanted result +rpcRequest uri method params = do + req <- try (view responseBody <$> (asJSON =<< postWith options uri req)) + return $ case req of + Left err -> Left ("RPC error: "++show (err :: SomeException)) + Right res -> case (error res) of + Nothing -> Right (fromJust $ result res) + Just err -> Left ("API error "++code err++": "++message err) + where + req = toJSON (RPCRequest "namecoin-update" method params) + options = set checkResponse (Just $ \_ _ -> return ()) defaults -defaultPath :: FilePath -defaultPath = "$XDG_CONFIG_HOME/namecoin" +-- | Return the list of currently registered names +nameList :: String -> IO (Error [Name]) +nameList uri = rpcRequest uri "name_list" [] -namecoin :: FilePath -> [String] -> CreateProcess -namecoin path args = shell ("namecoind -conf=" ++ path ++ " " ++ unwords args) +-- * Expiration checking +-- | Check whether a name is going to expire soon (~2 day) +isExpiring :: Name -> Bool +isExpiring name = expires_in name < 100 -readCommand conf = readCreateProcess (namecoin conf ["name_list"]) "" -updateCommand conf n v = readCreateProcessWithExitCode (namecoin conf ["name_update", n, v]) "" - - -updateName :: FilePath -> Name -> IO Int -updateName conf Name{..} - | expires_in < 100 = do - (code, out, err) <- updateCommand conf name value - if code == ExitSuccess - then putStrLn (name ++ " updated: " ++ out) >> return 0 - else putStrLn (name ++ " update failed: " ++ err) >> return 1 - | otherwise = putStrLn ("No need to update " ++ name) >> return 0 +-- | Issue an udpate for a name (confirming its current value) +nameUpdate :: String -> Name -> IO Int +nameUpdate uri (Name {..}) = do + putStr ("Updating name "++name++"... ") + req <- rpcRequest uri "name_update" [ name, value ] + case req of + Left err -> putStrLn "failed" >> putStrLn err >> return 1 + Right _ -> putStrLn "ok" >> return 1 +-- | Check for names that will expire soon and update them +nameCheck :: String -> IO () +nameCheck uri = do + names <- nameList uri + case names of + Left error -> putStrLn ("Name check failed. "++error) + Right names -> do + let expiring = filter isExpiring names + total = length expiring + failed <- sum <$> mapM (nameUpdate uri) expiring + if failed == 0 + then putStrLn "Names updated: all ok." + else putStrLn (show failed ++ "/" ++ show total ++ " failed.") +-- | Main function +-- +-- Reads the path of a namecoin config file +-- from the process arguments, connects to the +-- RPC server and updates the names found, if necessary. main :: IO () main = do - conf <- (fromMaybe defaultPath . listToMaybe) <$> getArgs - out <- pack <$> readCommand conf - case eitherDecode out of - Right names -> do - errs <- sum <$> mapM (updateName conf) (names :: [Name]) - if errs > 0 - then putStrLn (show errs ++ " updates failed") - else putStrLn "All ok" - Left err -> putStrLn ("Error communicating with namecoin: " ++ err) + args <- getArgs + when (null args) (fail "Must provide a namecoin config file.") + conf <- readFile (head args) + case uri conf of + Left err -> putStrLn ("Error reading config: " ++ err) + Right uri -> nameCheck uri diff --git a/namecoin-update.cabal b/namecoin-update.cabal index 447518c..8deee10 100644 --- a/namecoin-update.cabal +++ b/namecoin-update.cabal @@ -1,7 +1,7 @@ name: namecoin-update -version: 0.1.2.0 -synopsis: Script to update namecoin names -license: MIT +version: 0.2.0.0 +synopsis: Tool to keep namecoin names updated and well +license: GPL-3 license-file: LICENSE author: rnhmjoj maintainer: micheleguerinirocco@me.com