*      !"#$%&'()NoneINReceives bytes from a connected socket with a maximum chunk size. The bytestream ends if the remote peer closes its side of the connection or EOF is received. The implementation is as follows: fromSocket sock nbytes = loop where loop = do bs <- liftIO (NSB.recv sock nbytes) if B.null bs then return () else Q.chunk bs >> loopZConnect a stream of bytes to the remote end. The implementation is again very simple: toSocket sock = loop where loop bs = do e <- Q.nextChunk bs case e of Left r -> return r Right (b,rest) -> send sock b >> loop restConnected socket.XMaximum number of bytes to receive and send dowstream at once. Renzo recommends using 4096% if you don't have a special purpose.Connected socket.*+,-./0123456789:;<=>?NoneIN Construct an ordinary pipes @ from a A of elements3runEffect $ fromStream (S.each [1..3]) >-> P.print123  Construct a A of elements from a pipes @"S.print $ toStream $ P.each [1..3]123 FLink the chunks of a producer of bytestrings into a single byte stream 7Successively yield the chunks hidden in a byte stream.   splits a @ into two @ s; the outer @b is the longest consecutive group of elements that satisfy the predicate. Its inverse is  splits a @ into two @ s; the outer @_ is the longest consecutive group of elements that fail the predicate. Its inverse is  divides a @ into two @8s after a fixed number of elements. Its inverse is  splits a @ into two @s; the second producer begins where we meet an element that is different according to the equality predicate. Its inverse is Like #, where the equality predicate is (B) splits a @ into a A of @%s of equal items. Its inverse is  groupsBy' splits a @ into a A of @7s grouped using the given relation. Its inverse is This differs from h by comparing successive elements instead of comparing each element to the first member of the groupimport Pipes (yield, each)import Pipes.Prelude (toList)let rel c1 c2 = succ c1 == c2E(toList . intercalates (yield '|') . groupsBy' rel) (each "12233345") "12|23|3|345"E(toList . intercalates (yield '|') . groupsBy rel) (each "12233345")"122|3|3|34|5" splits a @ into a A of @(s of a given length. Its inverse is .4let listN n = L.purely P.folds L.list . P.chunksOf nHrunEffect $ listN 3 P.stdinLn >-> P.take 2 >-> P.map unwords >-> P.print1<Enter>2<Enter>3<Enter>"1 2 3"4<Enter>5<Enter>6<Enter>"4 5 6"Blet stylish = P.concats . P.maps (<* P.yield "-*-") . P.chunksOf 2QrunEffect $ stylish (P.each $ words "one two three four five six") >-> P.stdoutLn onetwo-*-threefour-*-fivesix-*-Join a stream of @s into a single @ Fold each @ in a producer A Vpurely folds :: Monad m => Fold a b -> Stream (Producer a m) m r -> Producer b m r Fold each @ in a @ stream, monadically Zimpurely foldsM :: Monad m => FoldM a b -> Stream (Producer a m) m r -> Producer b m r (takes' n) only keeps the first n @s of a linked A of  ProducersUnlike , - is not functor-general - it is aware that a @ can be drainedH, as functors cannot generally be. Here, then, we drain the unused @Us in order to preserve the return value. This makes it a suitable argument for .  Step functionInitial accumulatorExtraction function Step functionInitial accumulatorExtraction function    None Send an HTTP C and wait for an HTTP D Create a E( from a content length and an effectful F Create a E from an effectful F is more flexible than C, but requires the server to support chunked transfer encoding.This is a quick method - oleg would call it 'unprofessional' - to bring a web page in view. It sparks its own internal manager and closes itself. Thus something like this makes senseArunResourceT $ Q.putStrLn $ simpleHttp "http://lpaste.net/raw/12"chunk _ [] = [];chunk n xs = let h = take n xs in h : (chunk n (drop n xs))but if you try something like\rest <- runResourceT $ Q.putStrLn $ Q.splitAt 40 $ simpleHTTP "http://lpaste.net/raw/146532"&import Data.ByteString.Streaming.HTTP "it will just be good luck if with runResourceT $ Q.putStrLn restyou get the rest of the file:  import qualified Data.ByteString.Streaming.Char8 as Q main = runResourceT $ Q.putStrLn $ simpleHTTP "http://lpaste.net/raw/146532" rather than  J*** Exception: <socket: 13>: hGetBuf: illegal operation (handle is closed)DSince, of course, the handle was already closed by the first use of  runResourceT6. The same applies of course to the more hygienic - above, which permits one to extract an IO (ByteString IO r) , by using splitAt or the like. UThe reaction of some streaming-io libraries was simply to forbid operations like splitAt. That this paternalism was not viewed as simply outrageous is a consequence of the opacity of the older iteratee-io libraries. It is obviousj that I can no more run an effectful bytestring after I have made its effects impossible by using  runResourceT (which basically means closeEverythingDown). I might as well try to run it after tossing my machine into the flames. Similarly, it is obvious that I cannot read from a handle after I have applied hClose6; there is simply no difference between the two cases.Handler for responseGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ECDGHNone!The result of a parse (Either a ([String], String)#), with the unconsumed byte stream.O:set -XOverloadedStrings -- the string literal below is a streaming bytestringJ(r,rest1) <- AS.parse (A.scientific <* A.many' A.space) "12.3 4.56 78.3"print r Left 12.3=(s,rest2) <- AS.parse (A.scientific <* A.many' A.space) rest1print s Left 4.56=(t,rest3) <- AS.parse (A.scientific <* A.many' A.space) rest2print t Left 78.3Q.putStrLn rest3"Apply a parser repeatedly to a stream of bytes, streaming the parsed values, but ending when the parser fails.or the bytes run out.JS.print $ AS.parsed (A.scientific <* A.many' A.space) $ "12.3 4.56 78.9"12.34.5678.918.282 !"Attoparsec parser Raw input/ !" !" !"None+35IN$An  attoparsec7 error that happened while parsing the raw JSON string.%An aeson0 error that happened while trying to convert a   to an    instance, as reported by  .%An error while decoding a JSON value.&This instance allows using   with  and 0 instance Error (DecodingError, Producer a m r)Consecutively parse a elements from the given Producer" using the given parser (such as  or .), skipping any leading whitespace each time.This Producerf runs until it either runs out of input or until a decoding failure occurs, in which case it returns  with a # and a Producer! with any leftovers. You can use   to turn the   return value into an  monad transformer.Like , except it accepts any   instance, not just   or  .'VGiven a bytestring, parse a top level json entity - returning any leftover bytes. (`Resolve a succession of top-level json items into a corresponding stream of Haskell values. )(Experimental. Parse a bytestring with a  json-streams parser. The function will read through the whole of a single top level json entity, streaming the valid parses as they arise. (It will thus for example parse an infinite json bytestring, though these are rare in practice ...) ~If the parser is fitted to recognize only one thing, then zero or one item will be yielded; if it uses combinators like arrayOf, it will stream many values as they arise. See the example at the top of this module, in which values inside a top level array are emitted as they are parsed. Aeson would accumulate the whole bytestring before declaring on the contents of the array. This of course makes sense, since attempt to parse a json array may end with a bad parse, invalidating the json as a whole. With  json-streams, a bad parse will also of course emerge in the end, but only after the initial good parses are streamed. This too makes sense though, but in a smaller range of contexts -- for example, where one is folding over the parsed material.+This function is closely modelled on  and  from Data.JsonStream.Parser. #$%&'() #$%&'()#$%&'()#$%&'()  !"#!"$!"%&'()*+,-./0123456789:;<=>?@ABCDEFGHFGIFJKFLMFLNOPQOPROPSOPTOPUOPVOPWOPXOPYOPZOP[OP\O]^O]_O]`O]aO]bcde!"fghijkljkmjknopqrsjtujtvjtwjtxjtyjtzjt{jt|jt}j~j~j~j~j~jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjkjk                                              !  "  # $% $& $' $( $) $* $+ $, $- $. $/ $0 $1 $2 $3 $4 $5 $6 78 79 7:;<=><=?@AB@CD@CEFGstrea_5LYyOKMcLXEKzuY8sH0tSWData.ByteString.Streaming.HTTPStreaming.PipesStreaming.Network.TCP$Data.Attoparsec.ByteString.StreamingData.ByteString.Streaming.Aeson Control.Monadjoin Data.AesonValueAFromJSONError Pipes.LifterrorP Pipes.AesondecodeddecodedLdecode parseValueControl.Monad.Trans.ErrorErrorTencodeData.JsonStream.ParserparseByteStringparseLazyByteStringresou_18RGQAU2akxEhnLKgc9Jq7Control.Monad.Trans.Resource runResourceT%Control.Monad.Trans.Resource.Internal liftResourceT MonadResource ResourceTstrea_IcQB2cRGNusJrQa1p1a3jUStreaming.Internaltakes intercalatesmaps fromSockettoSocket fromStreamtoStreamtoStreamingByteStringfromStreamingByteStringspanbreaksplitbreakssplitAtgroupBygroupgroupsBy groupsBy'groupschunksOfconcatsfoldsfoldsMtakes'withHTTPstreamNstream simpleHTTPMessageparseparsed DecodingErrorAttoparsecError FromJSONError streamParsenetwo_A6pE0dLgMEk2GtUa1JtTJQNetwork.SocketHostName ServiceNameNetwork.Socket.Internal withSocketsDoNetwork.Socket.TypesSocketSockAddrnetwo_9vCzo3IPUKO74QibfDYRq7Network.Simple.TCPsendManysendLazysendrecv closeSockbindSock connectSock acceptForkacceptlistenserveconnectNetwork.Simple.InternalHostHostIPv6HostIPv4HostAnyHostPreferencepipes_BuPv5OpHkYKJdGg885pSs7 Pipes.CoreProducerStreamghc-prim GHC.Classes==httpc_2ftXothlM7QEUjpCnKv1nANetwork.HTTP.Client.TypesRequestResponse RequestBodystrea_BsF1fQHM136Iw8JzvqqR2u"Data.ByteString.Streaming.Internal ByteStringtofromNetwork.HTTP.ClientmanagerSetProxymanagerSetSecureProxymanagerSetInsecureProxywithResponseHistoryresponseOpenHistoryhrFinalResponsehrFinalRequest hrRedirectsHistoriedResponseNetwork.HTTP.Client.Core responseClose responseOpen httpNoBodyhttpLbs withResponseNetwork.HTTP.Client.CookiesgenerateCookieinsertCheckedCookiereceiveSetCookieupdateCookieJarcomputeCookieStringinsertCookiesIntoRequestevictExpiredCookies!removeExistingCookieFromCookieJardestroyCookieJarcreateCookieJar pathMatches defaultPath domainMatches isIpAddressNetwork.HTTP.Client.Body brConsume brReadSomebrReadNetwork.HTTP.Client.Manager defaultProxyproxyEnvironmentNamedproxyEnvironmentuseProxynoProxyproxyFromRequest withManager closeManager newManagerdefaultManagerSettingsrawConnectionModifySocketNetwork.HTTP.Client.RequestobservedStreamFile streamFilesetQueryStringurlEncodedBodyapplyBasicProxyAuthapplyBasicAuthgetUriparseUrl BodyReaderTlsExceptionHostPort!ResponseLengthAndChunkingBothUsedInvalidProxyEnvironmentVariableHttpZlibExceptionInvalidDestinationHostIncompleteHeadersInvalidChunkHeadersResponseBodyTooShortTlsNotSupported TlsExceptionNoResponseDataReceivedProxyConnectExceptionInternalIOException InvalidHeaderInvalidStatusLineExpectedBlankAfter100ContinueFailedConnectionException2FailedConnectionExceptionResponseTimeoutOverlongHeadersHandshakeFailedHttpParserExceptionTooManyRetriesUnparseableRedirectTooManyRedirectsInvalidUrlExceptionStatusCodeException HttpExceptioncookie_http_onlycookie_secure_onlycookie_host_onlycookie_persistentcookie_last_access_timecookie_creation_time cookie_path cookie_domaincookie_expiry_time cookie_value cookie_nameCookie CookieJar proxyPort proxyHostProxyRequestBodyStreamChunkedRequestBodyStreamRequestBodyBuilder RequestBodyBSRequestBodyLBSPopper NeedsPopper GivesPopperrequestVersion cookieJarresponseTimeout checkStatus redirectCount decompressproxy requestBodyrequestHeaders queryStringpathporthostsecuremethodresponseCookieJar responseBodyresponseHeadersresponseVersionresponseStatusmanagerModifyRequestmanagerIdleConnectionCountmanagerWrapIOExceptionmanagerRetryableExceptionmanagerResponseTimeoutmanagerTlsConnectionmanagerRawConnectionmanagerConnCountManagerSettings ProxyOverrideManagergetHttpManagerHasHttpManager thisChunkSize readSoFarfileSizeStreamFileStatushttpc_7JsMjd7ibPl5y3iUkflPWFNetwork.HTTP.Client.TLSgetTlsConnectiontlsManagerSettingsmkManagerSettingsattop_C6pUTDzrecbIO4LDYHwJUG#Data.Attoparsec.ByteString.Internalmatch parseOnly peekWord8' peekWord8notWord8word8anyWord8 notInClassinClass takeWhile1 runScannerscantakeLazyByteStringtakeByteString takeWhiletakeTill skipWhilestringtake satisfyWithskipsatisfyParserData.Attoparsec.CombinatorfeedeitherPcount skipMany1skipMany manyTill'manyTillsepBy1'sepBy1sepBy'sepBymany1'many1many'optionchoicetryData.Attoparsec.InternalatEnd endOfInputcompareResults ParsingErrorbase Data.EitherLeftEitheraeson_Ks1XHzbIVxSH3D4r6wYTSBData.Aeson.Types.ClassToJSONData.Aeson.Types.InternalArrayObject$fExceptionDecodingError