mirror of
https://github.com/hasura/graphql-engine.git
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a7a60c2dfe
* new typeclass to abstract the logic of QueryLog-ing * abstract the logic of logging websocket-server logs introduce a MonadWSLog typeclass * move catalog initialization to init step expose a helper function to migrate catalog create schema cache in initialiseCtx * expose various modules and functions for pro
88 lines
3.0 KiB
Haskell
88 lines
3.0 KiB
Haskell
module Network.Wai.Extended
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( module Wai
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, getSourceFromFallback
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, IpAddress (..)
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, showIPAddress
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) where
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import qualified Data.ByteString.Char8 as BS
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import qualified Data.Text.Encoding as TE
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import qualified Data.Text.Encoding.Error as TE
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import Data.List (find)
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import Data.Maybe (fromMaybe)
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import Data.Text (Text)
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import Prelude
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import Data.Bits (shift, (.&.))
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import Data.ByteString.Char8 (ByteString)
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import Data.Word (Word32)
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import Network.Socket (SockAddr (..))
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import Network.Wai as Wai
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import System.ByteOrder (ByteOrder (..), byteOrder)
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import Text.Printf (printf)
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-- | IP Address related code
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newtype IpAddress
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= IpAddress { unIpAddress :: ByteString }
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deriving (Show, Eq)
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showIPAddress :: IpAddress -> Text
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showIPAddress = TE.decodeUtf8With TE.lenientDecode . unIpAddress
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getSourceFromSocket :: Wai.Request -> IpAddress
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getSourceFromSocket = IpAddress . BS.pack . showSockAddr . Wai.remoteHost
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getSourceFromFallback :: Wai.Request -> IpAddress
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getSourceFromFallback req = fromMaybe (getSourceFromSocket req) $ getSource req
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getSource :: Wai.Request -> Maybe IpAddress
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getSource req = IpAddress <$> addr
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where
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maddr = find (\x -> fst x `elem` ["x-real-ip", "x-forwarded-for"]) hdrs
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addr = fmap snd maddr
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hdrs = Wai.requestHeaders req
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-- | A type for IP address in numeric string representation.
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type NumericAddress = String
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showIPv4 :: Word32 -> Bool -> NumericAddress
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showIPv4 w32 little
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| little = show b1 ++ "." ++ show b2 ++ "." ++ show b3 ++ "." ++ show b4
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| otherwise = show b4 ++ "." ++ show b3 ++ "." ++ show b2 ++ "." ++ show b1
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where
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t1 = w32
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t2 = shift t1 (-8)
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t3 = shift t2 (-8)
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t4 = shift t3 (-8)
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b1 = t1 .&. 0x000000ff
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b2 = t2 .&. 0x000000ff
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b3 = t3 .&. 0x000000ff
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b4 = t4 .&. 0x000000ff
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showIPv6 :: (Word32,Word32,Word32,Word32) -> String
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showIPv6 (w1,w2,w3,w4) =
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printf "%x:%x:%x:%x:%x:%x:%x:%x" s1 s2 s3 s4 s5 s6 s7 s8
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where
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(s1,s2) = split16 w1
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(s3,s4) = split16 w2
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(s5,s6) = split16 w3
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(s7,s8) = split16 w4
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split16 w = (h1,h2)
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where
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h1 = shift w (-16) .&. 0x0000ffff
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h2 = w .&. 0x0000ffff
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-- | Convert 'SockAddr' to 'NumericAddress'. If the address is
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-- IPv4-embedded IPv6 address, the IPv4 is extracted.
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showSockAddr :: SockAddr -> NumericAddress
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-- HostAddr is network byte order.
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showSockAddr (SockAddrInet _ addr4) = showIPv4 addr4 (byteOrder == LittleEndian)
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-- HostAddr6 is host byte order.
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showSockAddr (SockAddrInet6 _ _ (0,0,0x0000ffff,addr4) _) = showIPv4 addr4 False
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showSockAddr (SockAddrInet6 _ _ (0,0,0,1) _) = "::1"
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showSockAddr (SockAddrInet6 _ _ addr6 _) = showIPv6 addr6
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showSockAddr _ = "unknownSocket"
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