On Jun 14, 2008, at 6:45 PM, Felipe Lessa wrote:
(Sorry, Sebastiaan, I hit send accidentally)
On Sat, Jun 14, 2008 at 1:18 PM, Sebastiaan Visser
<[EMAIL PROTECTED]> wrote:
readHttpMessage :: IO (Headers, Data.ByteString.Lazy.ByteString)
readHttpMessage = do
myStream <- <accept http connection from client>
request <- hGetContents myStream
header <- parseHttpHeader request
bs <- Data.ByteString.Lazy.hGetContents myStream
return (header, body)
Why not
readHttpMessage = do
myStream <- <accept http connection from client>
data <- Data.ByteString.Lazy.hGetContents myStream
(header, rest) <- parseHttpHeader data
return (header, rest)
i.e. make parseHttpHeader return the rest of the string it didn't
parse?
Doesn't this imply that the parseHttpHeader must work on ByteStrings
instead of regular Strings? Maybe this works for HTTP headers, but
sometimes ByteStrings are not appropriate. Especially when you are
not using the regular `System.IO.hGetContents' but the
`System.IO.UTF8.hGetContents'.
In fact, may I ask why parseHttpHeader is not a pure function?
This is not a real-life example. It might as well be a pure function.
HTH,
-- Felipe.
--
Sebastiaan
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