1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
{-# LANGUAGE OverloadedStrings #-}
module Server where
import Control.Monad
import Crypto.Hash (Context, SHA1) -- cryptonite
import qualified Crypto.Hash as CH
import Data.ByteString (ByteString)
import qualified Data.ByteString as B
import Data.ByteString.Builder (byteString)
import qualified Data.ByteString.Builder as BB
import qualified Data.ByteString.Char8 as C8
import Network.HTTP.Types
import Network.HTTP2.Server
server :: Server
server req _aux sendResponse = case requestMethod req of
Just "GET" -> case requestPath req of
Nothing -> sendResponse response404 []
Just path
| path == "/" -> sendResponse responseHello []
| "/perf/" `B.isPrefixOf` path -> do
case C8.readInt (B.drop 6 path) of
Nothing -> sendResponse responseHello []
Just (n, _) -> sendResponse (responsePerf n) []
| otherwise -> sendResponse response404 []
Just "POST" -> sendResponse (responseEcho req) []
_ -> sendResponse response404 []
responseHello :: Response
responseHello = responseBuilder ok200 header body
where
header = [("Content-Type", "text/plain")]
body = byteString "Hello, world!\n"
responsePerf :: Int -> Response
responsePerf n0 = responseStreaming ok200 header streaming
where
header = [("Content-Type", "text/plain")]
bs1024 = BB.byteString $ B.replicate 1024 65
streaming write _flush = loop n0
where
loop 0 = return ()
loop n
| n < 1024 = write $ BB.byteString $ B.replicate (fromIntegral n) 65
| otherwise = do
write bs1024
loop (n - 1024)
response404 :: Response
response404 = responseBuilder notFound404 header body
where
header = [("Content-Type", "text/plain")]
body = byteString "Not found\n"
responseEcho :: Request -> Response
responseEcho req = setResponseTrailersMaker h2rsp maker
where
h2rsp = responseStreaming ok200 header streamingBody
header = [("Content-Type", "text/plain")]
streamingBody write _flush = loop
where
loop = do
bs <- getRequestBodyChunk req
unless (B.null bs) $ do
void $ write $ byteString bs
loop
maker = trailersMaker (CH.hashInit :: Context SHA1)
-- Strictness is important for Context.
trailersMaker :: Context SHA1 -> Maybe ByteString -> IO NextTrailersMaker
trailersMaker ctx Nothing = return $ Trailers [("X-SHA1", sha1)]
where
sha1 = C8.pack $ show $ CH.hashFinalize ctx
trailersMaker ctx (Just bs) = return $ NextTrailersMaker $ trailersMaker ctx'
where
ctx' = CH.hashUpdate ctx bs
|
