227 lines
6.7 KiB
Haskell
227 lines
6.7 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Hledger.Web.WebOptions where
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import Data.ByteString (ByteString)
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import qualified Data.ByteString.Char8 as BC
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import Data.ByteString.UTF8 (fromString)
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import Data.CaseInsensitive (CI, mk)
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import Control.Monad (join)
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import Data.Default (Default(def))
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import Data.Maybe (fromMaybe)
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import qualified Data.Text as T
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import Data.Text (Text)
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import System.Environment (getArgs)
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import Network.Wai as WAI
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import Network.Wai.Middleware.Cors
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import Hledger.Cli hiding (packageversion, progname, prognameandversion)
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import Hledger.Web.Settings (defhost, defport, defbaseurl)
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-- cf Hledger.Cli.Version
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packageversion :: String
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#ifdef VERSION
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packageversion = VERSION
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#else
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packageversion = ""
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#endif
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progname :: String
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progname = "hledger-web"
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prognameandversion :: String
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prognameandversion = versionStringFor progname
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webflags :: [Flag RawOpts]
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webflags =
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[ flagNone
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["serve", "server"]
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(setboolopt "serve")
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"serve and log requests, don't browse or auto-exit"
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, flagNone
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["serve-api"]
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(setboolopt "serve-api")
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"like --serve, but serve only the JSON web API, without the server-side web UI"
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, flagReq
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["cors"]
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(\s opts -> Right $ setopt "cors" s opts)
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"ORIGIN"
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("allow cross-origin requests from the specified origin; setting ORIGIN to \"*\" allows requests from any origin")
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, flagReq
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["socket"]
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(\s opts -> Right $ setopt "socket" s opts)
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"SOCKET"
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"use the given socket instead of the given IP and port (implies --serve)"
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, flagReq
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["host"]
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(\s opts -> Right $ setopt "host" s opts)
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"IPADDR"
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("listen on this IP address (default: " ++ defhost ++ ")")
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, flagReq
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["port"]
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(\s opts -> Right $ setopt "port" s opts)
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"PORT"
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("listen on this TCP port (default: " ++ show defport ++ ")")
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, flagReq
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["base-url"]
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(\s opts -> Right $ setopt "base-url" s opts)
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"BASEURL"
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"set the base url (default: http://IPADDR:PORT)"
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, flagReq
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["file-url"]
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(\s opts -> Right $ setopt "file-url" s opts)
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"FILEURL"
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"set the static files url (default: BASEURL/static)"
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, flagReq
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["capabilities"]
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(\s opts -> Right $ setopt "capabilities" s opts)
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"CAP[,CAP..]"
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"enable the view, add, and/or manage capabilities (default: view,add)"
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, flagReq
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["capabilities-header"]
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(\s opts -> Right $ setopt "capabilities-header" s opts)
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"HTTPHEADER"
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"read capabilities to enable from a HTTP header, like X-Sandstorm-Permissions (default: disabled)"
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, flagNone
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["test"]
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(setboolopt "test")
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"run hledger-web's tests and exit. hspec test runner args may follow a --, eg: hledger-web --test -- --help"
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]
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webmode :: Mode RawOpts
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webmode =
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(mode
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"hledger-web"
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(setopt "command" "web" def)
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"start serving the hledger web interface"
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(argsFlag "[PATTERNS]")
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[])
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{ modeGroupFlags =
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Group
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{ groupUnnamed = webflags
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, groupHidden =
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hiddenflags
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-- ++
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-- [ flagNone
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-- ["binary-filename"]
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-- (setboolopt "binary-filename")
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-- "show the download filename for this executable, and exit"
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-- ]
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, groupNamed = [generalflagsgroup1]
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}
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, modeHelpSuffix = []
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}
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-- hledger-web options, used in hledger-web and above
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data WebOpts = WebOpts
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{ serve_ :: Bool
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, serve_api_ :: Bool
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, cors_ :: Maybe String
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, host_ :: String
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, port_ :: Int
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, base_url_ :: String
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, file_url_ :: Maybe String
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, capabilities_ :: [Capability]
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, capabilitiesHeader_ :: Maybe (CI ByteString)
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, cliopts_ :: CliOpts
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, socket_ :: Maybe String
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} deriving (Show)
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defwebopts :: WebOpts
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defwebopts = WebOpts
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{ serve_ = False
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, serve_api_ = False
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, cors_ = Nothing
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, host_ = ""
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, port_ = def
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, base_url_ = ""
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, file_url_ = Nothing
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, capabilities_ = [CapView, CapAdd]
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, capabilitiesHeader_ = Nothing
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, cliopts_ = def
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, socket_ = Nothing
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}
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instance Default WebOpts where def = defwebopts
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rawOptsToWebOpts :: RawOpts -> IO WebOpts
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rawOptsToWebOpts rawopts =
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checkWebOpts <$> do
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cliopts <- rawOptsToCliOpts rawopts
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let h = fromMaybe defhost $ maybestringopt "host" rawopts
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p = fromMaybe defport $ maybeposintopt "port" rawopts
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b =
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maybe (defbaseurl h p) stripTrailingSlash $
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maybestringopt "base-url" rawopts
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caps' = join $ T.splitOn "," . T.pack <$> listofstringopt "capabilities" rawopts
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caps = case traverse capabilityFromText caps' of
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Left e -> error' ("Unknown capability: " ++ T.unpack e) -- PARTIAL:
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Right [] -> [CapView, CapAdd]
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Right xs -> xs
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sock = stripTrailingSlash <$> maybestringopt "socket" rawopts
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return
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defwebopts
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{ serve_ = case sock of
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Just _ -> True
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Nothing -> boolopt "serve" rawopts
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, serve_api_ = boolopt "serve-api" rawopts
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, cors_ = maybestringopt "cors" rawopts
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, host_ = h
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, port_ = p
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, base_url_ = b
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, file_url_ = stripTrailingSlash <$> maybestringopt "file-url" rawopts
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, capabilities_ = caps
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, capabilitiesHeader_ = mk . BC.pack <$> maybestringopt "capabilities-header" rawopts
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, cliopts_ = cliopts
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, socket_ = sock
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}
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where
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stripTrailingSlash = reverse . dropWhile (== '/') . reverse -- yesod don't like it
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checkWebOpts :: WebOpts -> WebOpts
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checkWebOpts = id
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getHledgerWebOpts :: IO WebOpts
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getHledgerWebOpts = do
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args <- fmap replaceNumericFlags . expandArgsAt =<< getArgs
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rawOptsToWebOpts . either usageError id $ process webmode args
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data Capability
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= CapView
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| CapAdd
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| CapManage
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deriving (Eq, Ord, Bounded, Enum, Show)
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capabilityFromText :: Text -> Either Text Capability
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capabilityFromText "view" = Right CapView
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capabilityFromText "add" = Right CapAdd
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capabilityFromText "manage" = Right CapManage
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capabilityFromText x = Left x
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capabilityFromBS :: ByteString -> Either ByteString Capability
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capabilityFromBS "view" = Right CapView
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capabilityFromBS "add" = Right CapAdd
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capabilityFromBS "manage" = Right CapManage
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capabilityFromBS x = Left x
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simplePolicyWithOrigin :: Origin -> CorsResourcePolicy
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simplePolicyWithOrigin origin =
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simpleCorsResourcePolicy { corsOrigins = Just ([origin], False) }
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corsPolicyFromString :: String -> WAI.Middleware
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corsPolicyFromString origin =
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let
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policy = case origin of
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"*" -> simpleCorsResourcePolicy
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url -> simplePolicyWithOrigin $ fromString url
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in
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cors (const $ Just policy)
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corsPolicy :: WebOpts -> (Application -> Application)
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corsPolicy opts =
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maybe id corsPolicyFromString $ cors_ opts
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