Copyright	(c) 2014 Bryan O'Sullivan
License	BSD-style
Maintainer	bos@serpentine.com
Stability	experimental
Portability	GHC
Safe Haskell	Safe-Inferred
Language	Haskell98

Network.Wreq.Session

Contents

Session creation
- More control-oriented session creation
- Get information about session state
HTTP verbs
- Configurable verbs
Extending a session

Description

The functions in this module use a Session to handle the following common needs:

TCP connection reuse. This is important for performance when multiple requests go to a single server, particularly if TLS is being used.
Transparent cookie management. Any cookies set by the server persist from one request to the next. (Bypass this overhead using newAPISession.)

This module is designed to be used alongside the Network.Wreq module. Typical usage will look like this:

import Network.Wreq
import qualified Network.Wreq.Session as Sess

main = do
  sess <- Sess.newSession
  Sess.get sess "http://httpbin.org/get"

We create a Session using newSession, then pass the session to subsequent functions. When talking to a REST-like service that does not use cookies, it is more efficient to use newAPISession.

Note the use of qualified import statements in the examples above, so that we can refer unambiguously to the Session-specific implementation of HTTP GET.

One Manager (possibly set with newSessionControl) is used for all session requests. The manager settings in the Options parameter for the getWith, postWith and similar functions is ignored.

Synopsis

data Session
newSession :: IO Session
newAPISession :: IO Session
withSession :: (Session -> IO a) -> IO a
withAPISession :: (Session -> IO a) -> IO a
newSessionControl :: Maybe CookieJar -> ManagerSettings -> IO Session
withSessionWith :: ManagerSettings -> (Session -> IO a) -> IO a
withSessionControl :: Maybe CookieJar -> ManagerSettings -> (Session -> IO a) -> IO a
getSessionCookieJar :: Session -> IO (Maybe CookieJar)
get :: Session -> String -> IO (Response ByteString)
post :: Postable a => Session -> String -> a -> IO (Response ByteString)
head_ :: Session -> String -> IO (Response ())
options :: Session -> String -> IO (Response ())
put :: Putable a => Session -> String -> a -> IO (Response ByteString)
delete :: Session -> String -> IO (Response ByteString)
customMethod :: String -> Session -> String -> IO (Response ByteString)
getWith :: Options -> Session -> String -> IO (Response ByteString)
postWith :: Postable a => Options -> Session -> String -> a -> IO (Response ByteString)
headWith :: Options -> Session -> String -> IO (Response ())
optionsWith :: Options -> Session -> String -> IO (Response ())
putWith :: Putable a => Options -> Session -> String -> a -> IO (Response ByteString)
deleteWith :: Options -> Session -> String -> IO (Response ByteString)
customMethodWith :: String -> Options -> Session -> String -> IO (Response ByteString)
customPayloadMethodWith :: Postable a => String -> Options -> Session -> String -> a -> IO (Response ByteString)
customHistoriedMethodWith :: String -> Options -> Session -> String -> IO (HistoriedResponse ByteString)
customHistoriedPayloadMethodWith :: Postable a => String -> Options -> Session -> String -> a -> IO (HistoriedResponse ByteString)
seshRun :: Lens' Session (Session -> Run Body -> Run Body)

Session creation

data Session Source #

A session that spans multiple requests. This is responsible for cookie management and TCP connection reuse.

Instances

Instances details

Show Session Source #
Instance details Defined in Network.Wreq.Internal.Types Methods showsPrec :: Int -> Session -> ShowS # show :: Session -> String # showList :: [Session] -> ShowS #

newSession :: IO Session Source #

Create a Session.

This session manages cookies and uses default session manager configuration.

Since: 0.5.2.0

newAPISession :: IO Session Source #

Create a session.

This uses the default session manager settings, but does not manage cookies. It is intended for use with REST-like HTTP-based APIs, which typically do not use cookies.

Since: 0.5.2.0

withSession :: (Session -> IO a) -> IO a Source #

Deprecated: Use newSession instead.

Create a Session, passing it to the given function. The Session will no longer be valid after that function returns.

This session manages cookies and uses default session manager configuration.

withAPISession :: (Session -> IO a) -> IO a Source #

Deprecated: Use newAPISession instead.

Create a session.

This uses the default session manager settings, but does not manage cookies. It is intended for use with REST-like HTTP-based APIs, which typically do not use cookies.