Safe Haskell	Safe-Inferred
Language	Haskell2010

Network.HTTP2.Internal

Contents

File
Types
Request and response
Sender
Trailer
Thread Manager

Synopsis

type FileOffset = Int64
type ByteCount = Int64
type PositionRead = FileOffset -> ByteCount -> Buffer -> IO ByteCount
data Sentinel
- = Closer (IO ())
- | Refresher (IO ())
type PositionReadMaker = FilePath -> IO (PositionRead, Sentinel)
defaultPositionReadMaker :: PositionReadMaker
type Scheme = ByteString
type Authority = ByteString
type Path = ByteString
data InpObj = InpObj {
- inpObjHeaders :: HeaderTable
- inpObjBodySize :: Maybe Int
- inpObjBody :: InpBody
- inpObjTrailers :: IORef (Maybe HeaderTable)
}
type InpBody = IO ByteString
data OutObj = OutObj {
- outObjHeaders :: [Header]
- outObjBody :: OutBody
- outObjTrailers :: TrailersMaker
}
data OutBody
- = OutBodyNone
- | OutBodyStreaming ((Builder -> IO ()) -> IO () -> IO ())
- | OutBodyStreamingUnmask ((forall x. IO x -> IO x) -> (Builder -> IO ()) -> IO () -> IO ())
- | OutBodyBuilder Builder
- | OutBodyFile FileSpec
data FileSpec = FileSpec FilePath FileOffset ByteCount
data Next = Next BytesFilled Bool (Maybe DynaNext)
type BytesFilled = Int
type DynaNext = Buffer -> BufferSize -> WindowSize -> IO Next
data StreamingChunk
- = StreamingFinished (IO ())
- | StreamingFlush
- | StreamingBuilder Builder
fillBuilderBodyGetNext :: Builder -> DynaNext
fillFileBodyGetNext :: PositionRead -> FileOffset -> ByteCount -> IO () -> DynaNext
fillStreamBodyGetNext :: IO (Maybe StreamingChunk) -> DynaNext
type TrailersMaker = Maybe ByteString -> IO NextTrailersMaker
defaultTrailersMaker :: TrailersMaker
data NextTrailersMaker
- = NextTrailersMaker TrailersMaker
- | Trailers [Header]
runTrailersMaker :: TrailersMaker -> Buffer -> Int -> IO NextTrailersMaker
data Manager
type Action = IO ()
start :: Manager -> IO Manager
setAction :: Manager -> Action -> IO ()
stopAfter :: Manager -> IO a -> (Either SomeException a -> IO b) -> IO b
spawnAction :: Manager -> IO ()
forkManaged :: Manager -> IO () -> IO ()
forkManagedUnmask :: Manager -> ((forall x. IO x -> IO x) -> IO ()) -> IO ()
timeoutKillThread :: Manager -> (Handle -> IO a) -> IO a
timeoutClose :: Manager -> IO () -> IO (IO ())
data KilledByHttp2ThreadManager = KilledByHttp2ThreadManager (Maybe SomeException)
incCounter :: Manager -> IO ()
decCounter :: Manager -> IO ()
waitCounter0 :: Manager -> IO ()

File

type FileOffset = Int64 Source #

Offset for file.

type ByteCount = Int64 Source #

How many bytes to read

type PositionRead = FileOffset -> ByteCount -> Buffer -> IO ByteCount Source #

Position read for files.

data Sentinel Source #

Manipulating a file resource.

Constructors

Closer (IO ())	Closing a file resource. Its refresher is automatiaclly generated by the internal timer.
Refresher (IO ())	Refreshing a file resource while reading. Closing the file must be done by its own timer or something.

type PositionReadMaker = FilePath -> IO (PositionRead, Sentinel) Source #

Making a position read and its closer.

defaultPositionReadMaker :: PositionReadMaker Source #

Position read based on Handle.

Types

type Scheme = ByteString Source #

"http" or "https".

type Authority = ByteString Source #

Authority.

type Path = ByteString Source #

Path.

Request and response

data InpObj Source #

Input object

Constructors

InpObj
Fields inpObjHeaders :: HeaderTable Accessor for headers. inpObjBodySize :: Maybe Int Accessor for body length specified in content-length:. inpObjBody :: InpBody Accessor for body. inpObjTrailers :: IORef (Maybe HeaderTable) Accessor for trailers.

Instances

Instances details

Show InpObj Source #
Instance details Defined in Network.HTTP2.H2.Types Methods showsPrec :: Int -> InpObj -> ShowS # show :: InpObj -> String # showList :: [InpObj] -> ShowS #

type InpBody = IO ByteString Source #

data OutObj Source #

Output object

Constructors

OutObj
Fields outObjHeaders :: [Header] Accessor for header. outObjBody :: OutBody Accessor for outObj body. outObjTrailers :: TrailersMaker Accessor for trailers maker.

Instances

Instances details

Show OutObj Source #
Instance details Defined in Network.HTTP2.H2.Types Methods showsPrec :: Int -> OutObj -> ShowS # show :: OutObj -> String # showList :: [OutObj] -> ShowS #

data OutBody Source #

Constructors

OutBodyNone
OutBodyStreaming ((Builder -> IO ()) -> IO () -> IO ())	Streaming body takes a write action and a flush action.
OutBodyStreamingUnmask ((forall x. IO x -> IO x) -> (Builder -> IO ()) -> IO () -> IO ())	Like `OutBodyStreaming`, but with a callback to unmask expections This is used in the client: we spawn the new thread for the request body with exceptions masked, and provide the body of `OutBodyStreamingUnmask` with a callback to unmask them again (typically after installing an exception handler). We do NOT support this in the server, as here the scope of the thread that is spawned for the server is the entire handler, not just the response streaming body. TODO: The analogous change for the server-side would be to provide a similar `unmask` callback as the first argument in the `Server` type alias.
OutBodyBuilder Builder
OutBodyFile FileSpec

data FileSpec Source #

File specification.

Constructors

FileSpec FilePath FileOffset ByteCount

Instances

Instances details

Show FileSpec Source #
Instance details Defined in Network.HTTP2.H2.Types Methods showsPrec :: Int -> FileSpec -> ShowS # show :: FileSpec -> String # showList :: [FileSpec] -> ShowS #
Eq FileSpec Source #
Instance details Defined in Network.HTTP2.H2.Types Methods (==) :: FileSpec -> FileSpec -> Bool # (/=) :: FileSpec -> FileSpec -> Bool #

Sender

data Next Source #

Constructors

Next BytesFilled Bool (Maybe DynaNext)

type BytesFilled = Int Source #

type DynaNext = Buffer -> BufferSize -> WindowSize -> IO Next Source #

data StreamingChunk Source #

Constructors

StreamingFinished (IO ())
StreamingFlush
StreamingBuilder Builder

fillBuilderBodyGetNext :: Builder -> DynaNext Source #

fillFileBodyGetNext :: PositionRead -> FileOffset -> ByteCount -> IO () -> DynaNext Source #

fillStreamBodyGetNext :: IO (Maybe StreamingChunk) -> DynaNext Source #

Trailer

type TrailersMaker = Maybe ByteString -> IO NextTrailersMaker Source #

Trailers maker. A chunks of the response body is passed with Just. The maker should update internal state with the ByteString and return the next trailers maker. When response body reaches its end, Nothing is passed and the maker should generate trailers. An example:

{-# LANGUAGE BangPatterns #-}
import Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as C8
import Crypto.Hash (Context, SHA1) -- cryptonite
import qualified Crypto.Hash as CH

-- 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

Usage example:

let h2rsp = responseFile ...
    maker = trailersMaker (CH.hashInit :: Context SHA1)
    h2rsp' = setResponseTrailersMaker h2rsp maker

defaultTrailersMaker :: TrailersMaker Source #

TrailersMake to create no trailers.

data NextTrailersMaker Source #

Either the next trailers maker or final trailers.

Constructors

NextTrailersMaker TrailersMaker
Trailers [Header]

runTrailersMaker :: TrailersMaker -> Buffer -> Int -> IO NextTrailersMaker Source #

Running trailers-maker.

bufferIO buf siz $ \bs -> tlrmkr (Just bs)

Thread Manager

data Manager Source #

Manager to manage the thread and the timer.

type Action = IO () Source #

Action to be spawned by the manager.

start :: Manager -> IO Manager Source #

Starting a thread manager. Its action is initially set to 'return ()' and should be set by setAction. This allows that the action can include the manager itself.

setAction :: Manager -> Action -> IO () Source #

Setting the action to be spawned.

stopAfter :: Manager -> IO a -> (Either SomeException a -> IO b) -> IO b Source #

Stopping the manager.

spawnAction :: Manager -> IO () Source #

Spawning the action.

forkManaged :: Manager -> IO () -> IO () Source #

Fork managed thread

This guarantees that the thread ID is added to the manager's queue before the thread starts, and is removed again when the thread terminates (normally or abnormally).

forkManagedUnmask :: Manager -> ((forall x. IO x -> IO x) -> IO ()) -> IO () Source #

Like forkManaged, but run action with exceptions masked

timeoutKillThread :: Manager -> (Handle -> IO a) -> IO a Source #

Killing the IO action of the second argument on timeout.

timeoutClose :: Manager -> IO () -> IO (IO ()) Source #

Registering closer for a resource and returning a timer refresher.

data KilledByHttp2ThreadManager Source #

Constructors

KilledByHttp2ThreadManager (Maybe SomeException)

Instances

Instances details

Exception KilledByHttp2ThreadManager Source #
Instance details Defined in Network.HTTP2.H2.Manager Methods toException :: KilledByHttp2ThreadManager -> SomeException # fromException :: SomeException -> Maybe KilledByHttp2ThreadManager # displayException :: KilledByHttp2ThreadManager -> String #
Show KilledByHttp2ThreadManager Source #
Instance details Defined in Network.HTTP2.H2.Manager Methods showsPrec :: Int -> KilledByHttp2ThreadManager -> ShowS # show :: KilledByHttp2ThreadManager -> String # showList :: [KilledByHttp2ThreadManager] -> ShowS #

incCounter :: Manager -> IO () Source #

decCounter :: Manager -> IO () Source #

waitCounter0 :: Manager -> IO () Source #