136 lines
4.1 KiB
Haskell
136 lines
4.1 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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module Config(Configuration(..),defaultConfiguration,HttpConfiguration (..)) where
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import Toml (TomlCodec, (.=))
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import qualified Toml
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import System.IO
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import qualified Data.Text as T
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-- this module should handle everything connected to our TOML config
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#if defined(HTTP_SUPPORT) || defined(HTTPS_SUPPORT)
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import Data.String
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import qualified Network.Wai.Handler.Warp as HTTP
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#endif
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#ifdef HTTPS_SUPPORT
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import qualified Network.Wai.Handler.WarpTLS as HTTPS
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#endif
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data Configuration = Configuration
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{ cppDummy :: () -- this is a hack to get around the , rules of haskell records and the preprocessor
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#ifdef HTTP_SUPPORT
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, httpConf :: [HttpConfiguration]
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#endif
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#ifdef HTTPS_SUPPORT
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, httpsConf :: [(HttpConfiguration,HttpsConfiguration)]
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#endif
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#ifdef FASTCGI_SUPPORT
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, fastCgiConf :: [FastCgiConfiguration]
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#endif
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#ifdef CGI_SUPPORT
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, cgiConf :: [CgiConfiguration]
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#endif
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}
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#if defined(HTTP_SUPPORT) || defined(HTTPS_SUPPORT)
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-- We leave it as a Text here and defer the conversion to the warp type to the last possible moment.
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-- At least we can touch and print a String. Excepet that we don't use it so we don't need it in another
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-- form
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type BindPreference = String
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_BindPreference :: Toml.TomlBiMap BindPreference Toml.AnyValue
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_BindPreference = Toml._String
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bindPreference :: Toml.Key -> TomlCodec BindPreference
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bindPreference = Toml.match _BindPreference
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data HttpConfiguration = HttpConfiguration
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{ port :: Int
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, bindPref :: BindPreference
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}
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httpDefaultSettings :: HttpConfiguration
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httpDefaultSettings = HttpConfiguration 80 "*"
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#endif
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#ifdef HTTPS_SUPPORT
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data HttpsConfiguration = HttpsConfiguration
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{ certFile :: FilePath
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, certChain :: [FilePath]
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, keyFile :: FilePath
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}
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httpsDefaultSettings :: HttpsConfiguration
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httpsDefaultSettings = HttpsConfiguration "certificate.pem" [] "key.pem"
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#endif
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#ifdef FASTCGI_SUPPORT
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data FastCgiConfiguration = FastCgiConfiguration
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#endif
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#ifdef CGI_SUPPORT
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data CgiConfiguration = CgiConfiguration
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#endif
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defaultConfiguration :: Configuration
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defaultConfiguration = Configuration ()
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#ifdef HTTP_SUPPORT
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[httpDefaultSettings]
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#endif
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#ifdef HTTPS_SUPPORT
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[(httpDefaultSettings,httpsDefaultSettings)]
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#endif
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#ifdef FASTCGI_SUPPORT
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[FastCgiConfiguration]
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#endif
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#ifdef CGI_SUPPORT
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[CgiConfiguration]
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#endif
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#if defined(HTTP_SUPPORT) || defined(HTTPS_SUPPORT)
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-- why a String? Why is the only way to generate a HostPreference by its IsString instance?
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-- why does warp not expose its constructors??
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httpConfigConstructor :: Int -> String -> HTTP.Settings
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httpConfigConstructor port bind = HTTP.setPort port $ HTTP.setHost (fromString bind) HTTP.defaultSettings
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httpConfigCodec :: TomlCodec HttpConfiguration
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httpConfigCodec = HttpConfiguration
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<$> Toml.int "Port" .= port
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<*> bindPreference "Bind" .= bindPref
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#endif
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#ifdef HTTPS_SUPPORT
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httpsConfigCodec :: TomlCodec (HttpConfiguration,HttpsConfiguration)
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httpsConfigCodec = Toml.pair httpConfigCodec httpsConfigCodec'
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httpsConfigCodec' :: TomlCodec HttpsConfiguration
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httpsConfigCodec' = HttpsConfiguration
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-- the hardcoded strings are a bloody hack, but we can't extract the values back out of a config (they are there
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-- warp just doesn't export the neccesarry types). So we hardcode default values, which is kind of realy bad, but
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-- we don't need it in our usecase
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<$> Toml.string "Certificate" .= certFile
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<*> Toml.arrayOf Toml._String "CertChain" .= certChain
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<*> Toml.string "KeyFile" .= keyFile
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#endif
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#ifdef FASTCGI_SUPPORT
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fastCgiConfigCodec :: TomlCodec FastCgiConfiguration
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fastCgiConfigCodec = pure FastCgiConfiguration
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#endif
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#ifdef CGI_SUPPORT
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cgiConfigCodec :: TomlCodec CgiConfiguration
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cgiConfigCodec = pure CgiConfiguration
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#endif
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configurationCodec :: TomlCodec Configuration
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configurationCodec = pure (Configuration ())
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#ifdef HTTP_SUPPORT
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<*> Toml.list httpConfigCodec "http" .= httpConf
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#endif
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#ifdef HTTPS_SUPPORT
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<*> Toml.list httpsConfigCodec "https" .= httpsConf
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#endif
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#ifdef FASTCGI_SUPPORT
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<*> Toml.list fastCgiConfigCodec "fast-cgi" .= fastCgiConf
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#endif
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#ifdef CGI_SUPPORT
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<*> Toml.list cgiConfigCodec "cgi" .= cgiConf
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#endif
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