[Haskell-cafe] Browser action and new http library

bbrown bbrown at botspiritcompany.com
Mon Nov 26 18:54:13 EST 2007

I am trying to use the HTTP library 3001 for ghc 6.8 and cant figure out how
to use a proxy to do a GET request as I am behind a proxy server.  My thinking
is that I could use the setProxy method it looks like it returns a
BrowserAction?  What do I do with that.  Here is the current code (I havent
really used the setProxy yet).

-- HTTP LIBRARY version: HTTP-3001.0.2

import Data.Char (intToDigit)
import Network.HTTP
import Network.URI
import Network.Browser (defaultGETRequest)
import System.Environment (getArgs)
import System.Exit (exitFailure)
import System.IO (hPutStrLn, stderr)

main = 
    args <- getArgs
    case args of 
	[addr] -> case parseURI addr of
		       Nothing -> err "Could not parse URI"
		       Just uri -> do
				   cont <- get uri
			           putStr cont
	_ -> err "Usage: lman <url>"

err :: String -> IO a
err msg = do 
	  hPutStrLn stderr msg

get :: URI -> IO String
get uri =
    eresp <- simpleHTTP (defaultGETRequest uri)
    resp <- handleErr (err . show) eresp
    case rspCode resp of
                      (2,0,0) -> return (rspBody resp)
                      _ -> err (httpError resp)
      showRspCode (a,b,c) = map intToDigit [a,b,c]
      httpError resp = showRspCode (rspCode resp) ++ " " ++ rspReason resp

-- Handle Connection Errors
handleErr :: Monad m => (ConnError -> m a) -> Either ConnError a -> m a
handleErr h (Left e) = h e
handleErr _ (Right v) = return v

-- End of File

Berlin Brown
[berlin dot brown at gmail dot com]

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