http2-4.2.2: HTTP/2 library
Safe HaskellSafe-Inferred
LanguageHaskell2010

Network.HTTP2.Internal

Synopsis

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.

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

Instances

Instances details
Show InpObj Source # 
Instance details

Defined in Network.HTTP2.Arch.Types

data OutObj Source #

Output object

Constructors

OutObj 

Fields

Instances

Instances details
Show OutObj Source # 
Instance details

Defined in Network.HTTP2.Arch.Types

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.

Instances

Instances details
Show FileSpec Source # 
Instance details

Defined in Network.HTTP2.Arch.Types

Eq FileSpec Source # 
Instance details

Defined in Network.HTTP2.Arch.Types

Sender

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.

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.