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{-# LANGUAGE BangPatterns #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
module Main where
import Control.Exception (throw, throwIO)
import Control.Monad
import qualified Data.ByteString as S
import qualified Data.ByteString.Char8 as B (pack, unpack)
import Data.ByteString.Internal
import Data.IORef (atomicModifyIORef', newIORef)
import qualified Data.List as L
import Data.Word8
import Foreign.ForeignPtr
import Foreign.Ptr
import Foreign.Storable
import qualified Network.HTTP.Types as H
import Prelude hiding (lines)
import Network.Wai.Handler.Warp.Request (FirstRequest (..), headerLines)
import Network.Wai.Handler.Warp.Types
import Criterion.Main
-- $setup
-- >>> :set -XOverloadedStrings
----------------------------------------------------------------
main :: IO ()
main = do
let requestLine1 = "GET http://www.example.com HTTP/1.1"
let requestLine2 = "GET http://www.example.com/cgi-path/search.cgi?key=parser HTTP/1.0"
defaultMain
[ bgroup
"requestLine1"
[ bench "parseRequestLine3" $ whnf parseRequestLine3 requestLine1
, bench "parseRequestLine2" $ whnfIO $ parseRequestLine2 requestLine1
, bench "parseRequestLine1" $ whnfIO $ parseRequestLine1 requestLine1
, bench "parseRequestLine0" $ whnfIO $ parseRequestLine0 requestLine1
]
, bgroup
"requestLine2"
[ bench "parseRequestLine3" $ whnf parseRequestLine3 requestLine2
, bench "parseRequestLine2" $ whnfIO $ parseRequestLine2 requestLine2
, bench "parseRequestLine1" $ whnfIO $ parseRequestLine1 requestLine2
, bench "parseRequestLine0" $ whnfIO $ parseRequestLine0 requestLine2
]
, bgroup
"parsing request"
[ bench "new parsing 4" $ whnfAppIO testIt (chunkRequest 4)
, bench "new parsing 10" $ whnfAppIO testIt (chunkRequest 10)
, bench "new parsing 25" $ whnfAppIO testIt (chunkRequest 25)
, bench "new parsing 100" $ whnfAppIO testIt (chunkRequest 100)
]
]
where
testIt req = producer req >>= headerLines 800 FirstRequest
----------------------------------------------------------------
-- |
--
-- >>> parseRequestLine3 "GET / HTTP/1.1"
-- ("GET","/","",HTTP/1.1)
-- >>> parseRequestLine3 "POST /cgi/search.cgi?key=foo HTTP/1.0"
-- ("POST","/cgi/search.cgi","?key=foo",HTTP/1.0)
-- >>> parseRequestLine3 "GET "
-- *** Exception: BadFirstLine "GET "
-- >>> parseRequestLine3 "GET /NotHTTP UNKNOWN/1.1"
-- *** Exception: NonHttp
parseRequestLine3
:: ByteString
-> ( H.Method
, ByteString -- Path
, ByteString -- Query
, H.HttpVersion
)
parseRequestLine3 requestLine = ret
where
(!method, !rest) = S.break (== _space) requestLine
(!pathQuery, !httpVer')
| rest == "" = throw badmsg
| otherwise = S.break (== _space) (S.drop 1 rest)
(!path, !query) = S.break (== _question) pathQuery
!httpVer = S.drop 1 httpVer'
(!http, !ver)
| httpVer == "" = throw badmsg
| otherwise = S.break (== _slash) httpVer
!hv
| http /= "HTTP" = throw NonHttp
| ver == "/1.1" = H.http11
| otherwise = H.http10
!ret = (method, path, query, hv)
badmsg = BadFirstLine $ B.unpack requestLine
----------------------------------------------------------------
-- |
--
-- >>> parseRequestLine2 "GET / HTTP/1.1"
-- ("GET","/","",HTTP/1.1)
-- >>> parseRequestLine2 "POST /cgi/search.cgi?key=foo HTTP/1.0"
-- ("POST","/cgi/search.cgi","?key=foo",HTTP/1.0)
-- >>> parseRequestLine2 "GET "
-- *** Exception: BadFirstLine "GET "
-- >>> parseRequestLine2 "GET /NotHTTP UNKNOWN/1.1"
-- *** Exception: NonHttp
parseRequestLine2
:: ByteString
-> IO
( H.Method
, ByteString -- Path
, ByteString -- Query
, H.HttpVersion
)
parseRequestLine2 requestLine@(PS fptr off len) = withForeignPtr fptr $ \ptr -> do
when (len < 14) $ throwIO baderr
let methodptr = ptr `plusPtr` off
limptr = methodptr `plusPtr` len
lim0 = fromIntegral len
pathptr0 <- memchr methodptr _space lim0
when (pathptr0 == nullPtr || (limptr `minusPtr` pathptr0) < 11) $
throwIO baderr
let pathptr = pathptr0 `plusPtr` 1
lim1 = fromIntegral (limptr `minusPtr` pathptr0)
httpptr0 <- memchr pathptr _space lim1
when (httpptr0 == nullPtr || (limptr `minusPtr` httpptr0) < 9) $
throwIO baderr
let httpptr = httpptr0 `plusPtr` 1
lim2 = fromIntegral (httpptr0 `minusPtr` pathptr)
checkHTTP httpptr
!hv <- httpVersion httpptr
queryptr <- memchr pathptr _question lim2
let !method = bs ptr methodptr pathptr0
!path
| queryptr == nullPtr = bs ptr pathptr httpptr0
| otherwise = bs ptr pathptr queryptr
!query
| queryptr == nullPtr = S.empty
| otherwise = bs ptr queryptr httpptr0
return (method, path, query, hv)
where
baderr = BadFirstLine $ B.unpack requestLine
check :: Ptr Word8 -> Int -> Word8 -> IO ()
check p n w = do
w0 <- peek $ p `plusPtr` n
when (w0 /= w) $ throwIO NonHttp
checkHTTP httpptr = do
check httpptr 0 _H
check httpptr 1 _T
check httpptr 2 _T
check httpptr 3 _P
check httpptr 4 _slash
check httpptr 6 _period
httpVersion httpptr = do
major <- peek $ httpptr `plusPtr` 5
minor <- peek $ httpptr `plusPtr` 7
if major == _1 && minor == _1
then return H.http11
else return H.http10
bs ptr p0 p1 = PS fptr o l
where
o = p0 `minusPtr` ptr
l = p1 `minusPtr` p0
----------------------------------------------------------------
-- |
--
-- >>> parseRequestLine1 "GET / HTTP/1.1"
-- ("GET","/","",HTTP/1.1)
-- >>> parseRequestLine1 "POST /cgi/search.cgi?key=foo HTTP/1.0"
-- ("POST","/cgi/search.cgi","?key=foo",HTTP/1.0)
-- >>> parseRequestLine1 "GET "
-- *** Exception: BadFirstLine "GET "
-- >>> parseRequestLine1 "GET /NotHTTP UNKNOWN/1.1"
-- *** Exception: NonHttp
parseRequestLine1
:: ByteString
-> IO
( H.Method
, ByteString -- Path
, ByteString -- Query
, H.HttpVersion
)
parseRequestLine1 requestLine = do
let (!method, !rest) = S.break (== _space) requestLine
(!pathQuery, !httpVer') = S.break (== _space) (S.drop 1 rest)
!httpVer = S.drop 1 httpVer'
when (rest == "" || httpVer == "") $
throwIO $
BadFirstLine $
B.unpack requestLine
let (!path, !query) = S.break (== _question) pathQuery
(!http, !ver) = S.break (== _slash) httpVer
when (http /= "HTTP") $ throwIO NonHttp
let !hv
| ver == "/1.1" = H.http11
| otherwise = H.http10
return $! (method, path, query, hv)
----------------------------------------------------------------
-- |
--
-- >>> parseRequestLine0 "GET / HTTP/1.1"
-- ("GET","/","",HTTP/1.1)
-- >>> parseRequestLine0 "POST /cgi/search.cgi?key=foo HTTP/1.0"
-- ("POST","/cgi/search.cgi","?key=foo",HTTP/1.0)
-- >>> parseRequestLine0 "GET "
-- *** Exception: BadFirstLine "GET "
-- >>> parseRequestLine0 "GET /NotHTTP UNKNOWN/1.1"
-- *** Exception: NonHttp
parseRequestLine0
:: ByteString
-> IO
( H.Method
, ByteString -- Path
, ByteString -- Query
, H.HttpVersion
)
parseRequestLine0 s =
case filter (not . S.null) $ S.splitWith (\c -> c == _space || c == _tab) s of
(method' : query : http'') -> do
let !method = method'
!http' = S.concat http''
(!hfirst, !hsecond) = S.splitAt 5 http'
if hfirst == "HTTP/"
then
let (!rpath, !qstring) = S.break (== _question) query
!hv =
case hsecond of
"1.1" -> H.http11
_ -> H.http10
in return $! (method, rpath, qstring, hv)
else throwIO NonHttp
_ -> throwIO $ BadFirstLine $ B.unpack s
producer :: [ByteString] -> IO Source
producer a = do
ref <- newIORef a
mkSource $
atomicModifyIORef' ref $ \case
[] -> ([], S.empty)
b : bs -> (bs, b)
chunkRequest :: Int -> [ByteString]
chunkRequest chunkAmount =
go basicRequest
where
len = L.length basicRequest
chunkSize = (len `div` chunkAmount) + 1
go [] = []
go xs =
let (a, b) = L.splitAt chunkSize xs
in B.pack a : go b
-- Random google search request
basicRequest :: String
basicRequest =
mconcat
[ "GET /search?q=test&sca_esv=600090652&source=hp&uact=5&oq=test&sclient=gws-wiz HTTP/3\r\n"
, "Host: www.google.com\r\n"
, "User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:121.0) Gecko/20100101 Firefox/121.0\r\n"
, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8\r\n"
, "Accept-Language: en-US,en;q=0.5\r\n"
, "Accept-Encoding: gzip, deflate, br\r\n"
, "Referer: https://www.google.com/\r\n"
, "Alt-Used: www.google.com\r\n"
, "Connection: keep-alive\r\n"
, "Cookie: CONSENT=PENDING+252\r\n"
, "Upgrade-Insecure-Requests: 1\r\n"
, "Sec-Fetch-Dest: document\r\n"
, "Sec-Fetch-Mode: navigate\r\n"
, "Sec-Fetch-Site: same-origin\r\n"
, "Sec-Fetch-User: ?1\r\n"
, "TE: trailers\r\n\r\n"
]
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