| Copyright | See LICENSE file |
|---|---|
| License | BSD |
| Maintainer | Ganesh Sittampalam <ganesh@earth.li> |
| Stability | experimental |
| Portability | non-portable (not tested) |
| Safe Haskell | None |
| Language | Haskell98 |
Network.Browser
Description
Session-level interactions over HTTP.
The Network.Browser goes beyond the basic Network.HTTP functionality in providing support for more involved, and real, request/response interactions over HTTP. Additional features supported are:
- HTTP Authentication handling
- Transparent handling of redirects
- Cookie stores + transmission.
- Transaction logging
- Proxy-mediated connections.
Example use:
do
(_, rsp)
<- Network.Browser.browse $ do
setAllowRedirects True -- handle HTTP redirects
request $ getRequest "http://www.haskell.org/"
return (take 100 (rspBody rsp))- data BrowserState connection
- data BrowserAction conn a
- data Proxy
- browse :: BrowserAction conn a -> IO a
- request :: HStream ty => Request ty -> BrowserAction (HandleStream ty) (URI, Response ty)
- getBrowserState :: BrowserAction t (BrowserState t)
- withBrowserState :: BrowserState t -> BrowserAction t a -> BrowserAction t a
- setAllowRedirects :: Bool -> BrowserAction t ()
- getAllowRedirects :: BrowserAction t Bool
- setMaxRedirects :: Maybe Int -> BrowserAction t ()
- getMaxRedirects :: BrowserAction t (Maybe Int)
- data Authority
- = AuthBasic {
- auRealm :: String
- auUsername :: String
- auPassword :: String
- auSite :: URI
- | AuthDigest { }
- = AuthBasic {
- getAuthorities :: BrowserAction t [Authority]
- setAuthorities :: [Authority] -> BrowserAction t ()
- addAuthority :: Authority -> BrowserAction t ()
- data Challenge
- data Qop
- data Algorithm
- = AlgMD5
- | AlgMD5sess
- getAuthorityGen :: BrowserAction t (URI -> String -> IO (Maybe (String, String)))
- setAuthorityGen :: (URI -> String -> IO (Maybe (String, String))) -> BrowserAction t ()
- setAllowBasicAuth :: Bool -> BrowserAction t ()
- getAllowBasicAuth :: BrowserAction t Bool
- setMaxErrorRetries :: Maybe Int -> BrowserAction t ()
- getMaxErrorRetries :: BrowserAction t (Maybe Int)
- setMaxPoolSize :: Maybe Int -> BrowserAction t ()
- getMaxPoolSize :: BrowserAction t (Maybe Int)
- setMaxAuthAttempts :: Maybe Int -> BrowserAction t ()
- getMaxAuthAttempts :: BrowserAction t (Maybe Int)
- setCookieFilter :: (URI -> Cookie -> IO Bool) -> BrowserAction t ()
- getCookieFilter :: BrowserAction t (URI -> Cookie -> IO Bool)
- defaultCookieFilter :: URI -> Cookie -> IO Bool
- userCookieFilter :: URI -> Cookie -> IO Bool
- data Cookie = MkCookie {}
- getCookies :: BrowserAction t [Cookie]
- setCookies :: [Cookie] -> BrowserAction t ()
- addCookie :: Cookie -> BrowserAction t ()
- setErrHandler :: (String -> IO ()) -> BrowserAction t ()
- setOutHandler :: (String -> IO ()) -> BrowserAction t ()
- setEventHandler :: Maybe (BrowserEvent -> BrowserAction ty ()) -> BrowserAction ty ()
- data BrowserEvent = BrowserEvent {}
- data BrowserEventType
- type RequestID = Int
- setProxy :: Proxy -> BrowserAction t ()
- getProxy :: BrowserAction t Proxy
- setCheckForProxy :: Bool -> BrowserAction t ()
- getCheckForProxy :: BrowserAction t Bool
- setDebugLog :: Maybe String -> BrowserAction t ()
- getUserAgent :: BrowserAction t String
- setUserAgent :: String -> BrowserAction t ()
- out :: String -> BrowserAction t ()
- err :: String -> BrowserAction t ()
- ioAction :: IO a -> BrowserAction t a
- defaultGETRequest :: URI -> Request_String
- defaultGETRequest_ :: BufferType a => URI -> Request a
- formToRequest :: Form -> Request_String
- uriDefaultTo :: URI -> URI -> URI
- data Form = Form RequestMethod URI [FormVar]
- type FormVar = (String, String)
Documentation
data BrowserState connection Source
BrowserState is the (large) record type tracking the current
settings of the browser.
Instances
| Show (BrowserState t) | |
| MonadState (BrowserState conn) (BrowserAction conn) |
data BrowserAction conn a Source
BrowserAction is the IO monad, but carrying along a BrowserState.
Instances
| Monad (BrowserAction conn) | |
| Functor (BrowserAction conn) | |
| Applicative (BrowserAction conn) | |
| MonadIO (BrowserAction conn) | |
| MonadState (BrowserState conn) (BrowserAction conn) |
browse :: BrowserAction conn a -> IO a Source
browse act is the toplevel action to perform a BrowserAction.
Example use: browse (request (getRequest yourURL)).
request :: HStream ty => Request ty -> BrowserAction (HandleStream ty) (URI, Response ty) Source
getBrowserState :: BrowserAction t (BrowserState t) Source
Deprecated: Use Control.Monad.State.get instead.
getBrowserState returns the current browser config. Useful
for restoring state across BrowserActions.
withBrowserState :: BrowserState t -> BrowserAction t a -> BrowserAction t a Source
withBrowserAction st act performs act with BrowserState st.
setAllowRedirects :: Bool -> BrowserAction t () Source
setAllowRedirects onOff toggles the willingness to
follow redirects (HTTP responses with 3xx status codes).
getAllowRedirects :: BrowserAction t Bool Source
getAllowRedirects returns current setting of the do-chase-redirects flag.
setMaxRedirects :: Maybe Int -> BrowserAction t () Source
setMaxRedirects maxCount sets the maxiumum number of forwarding hops
we are willing to jump through. A no-op if the count is negative; if zero,
the max is set to whatever default applies. Notice that setting the max
redirects count does not enable following of redirects itself; use
setAllowRedirects to do so.
getMaxRedirects :: BrowserAction t (Maybe Int) Source
getMaxRedirects returns the current setting for the max-redirect count.
If Nothing, the Network.Browser's default is used.
Authority specifies the HTTP Authentication method to use for
a given domain/realm; Basic or Digest.
Constructors
| AuthBasic | |
Fields
| |
| AuthDigest | |
getAuthorities :: BrowserAction t [Authority] Source
getAuthorities return the current set of Authoritys known
to the browser.
setAuthorities :: [Authority] -> BrowserAction t () Source
addAuthority :: Authority -> BrowserAction t () Source
Algorithm controls the digest algorithm to, MD5 or MD5Session.
Constructors
| AlgMD5 | |
| AlgMD5sess |
getAuthorityGen :: BrowserAction t (URI -> String -> IO (Maybe (String, String))) Source
getAuthorityGen returns the current authority generator
setAuthorityGen :: (URI -> String -> IO (Maybe (String, String))) -> BrowserAction t () Source
setAuthorityGen genAct sets the auth generator to genAct.
setAllowBasicAuth :: Bool -> BrowserAction t () Source
setAllowBasicAuth onOff enables/disables HTTP Basic Authentication.
setMaxErrorRetries :: Maybe Int -> BrowserAction t () Source
setMaxErrorRetries mbMax sets the maximum number of attempts at
transmitting a request. If Nothing, rever to default max.
getMaxErrorRetries :: BrowserAction t (Maybe Int) Source
getMaxErrorRetries returns the current max number of error retries.
setMaxPoolSize :: Maybe Int -> BrowserAction t () Source
setMaxPoolSize maxCount sets the maximum size of the connection pool
that is used to cache connections between requests
getMaxPoolSize :: BrowserAction t (Maybe Int) Source
getMaxPoolSize gets the maximum size of the connection pool
that is used to cache connections between requests.
If Nothing, the Network.Browser's default is used.
setMaxAuthAttempts :: Maybe Int -> BrowserAction t () Source
setMaxAuthAttempts mbMax sets the maximum number of authentication attempts
to do. If Nothing, rever to default max.
getMaxAuthAttempts :: BrowserAction t (Maybe Int) Source
getMaxAuthAttempts returns the current max auth attempts. If Nothing,
the browser's default is used.
setCookieFilter :: (URI -> Cookie -> IO Bool) -> BrowserAction t () Source
setCookieFilter fn sets the cookie acceptance filter to fn.
getCookieFilter :: BrowserAction t (URI -> Cookie -> IO Bool) Source
getCookieFilter returns the current cookie acceptance filter.
defaultCookieFilter :: URI -> Cookie -> IO Bool Source
defaultCookieFilter is the initial cookie acceptance filter.
It welcomes them all into the store :-)
userCookieFilter :: URI -> Cookie -> IO Bool Source
userCookieFilter is a handy acceptance filter, asking the
user if he/she is willing to accept an incoming cookie before
adding it to the store.
Cookie is the Haskell representation of HTTP cookie values.
See its relevant specs for authoritative details.
Constructors
| MkCookie | |
getCookies :: BrowserAction t [Cookie] Source
getCookies returns the current set of cookies known to
the browser.
setCookies :: [Cookie] -> BrowserAction t () Source
setCookies cookies replaces the set of cookies known to
the browser to cookies. Useful when wanting to restore cookies
used across browse invocations.
addCookie :: Cookie -> BrowserAction t () Source
addCookie c adds a cookie to the browser state, removing duplicates.
setErrHandler :: (String -> IO ()) -> BrowserAction t () Source
setErrHandler sets the IO action to call when
the browser reports running errors. To disable any
such, set it to const (return ()).
setOutHandler :: (String -> IO ()) -> BrowserAction t () Source
setOutHandler sets the IO action to call when
the browser chatters info on its running. To disable any
such, set it to const (return ()).
setEventHandler :: Maybe (BrowserEvent -> BrowserAction ty ()) -> BrowserAction ty () Source
setEventHandler onBrowserEvent configures event handling.
If onBrowserEvent is Nothing, event handling is turned off;
setting it to Just onEv causes the onEv IO action to be
notified of browser events during the processing of a request
by the Browser pipeline.
data BrowserEvent Source
BrowserEvent is the event record type that a user-defined handler, set
via setEventHandler, will be passed. It indicates various state changes
encountered in the processing of a given RequestID, along with timestamps
at which they occurred.
Constructors
| BrowserEvent | |
data BrowserEventType Source
BrowserEventType is the enumerated list of events that the browser
internals will report to a user-defined event handler.
setProxy :: Proxy -> BrowserAction t () Source
setProxy p will disable proxy usage if p is NoProxy.
If p is Proxy proxyURL mbAuth, then proxyURL is interpreted
as the URL of the proxy to use, possibly authenticating via
Authority information in mbAuth.
getProxy :: BrowserAction t Proxy Source
getProxy returns the current proxy settings. If
the auto-proxy flag is set to True, getProxy will
perform the necessary
setCheckForProxy :: Bool -> BrowserAction t () Source
setCheckForProxy flg sets the one-time check for proxy
flag to flg. If True, the session will try to determine
the proxy server is locally configured. See fetchProxy
for details of how this done.
getCheckForProxy :: BrowserAction t Bool Source
getCheckForProxy returns the current check-proxy setting.
Notice that this may not be equal to True if the session has
set it to that via setCheckForProxy and subsequently performed
some HTTP protocol interactions. i.e., the flag return represents
whether a proxy will be checked for again before any future protocol
interactions.
setDebugLog :: Maybe String -> BrowserAction t () Source
setDebugLog mbFile turns off debug logging iff mbFile
is Nothing. If set to Just fStem, logs of browser activity
is appended to files of the form fStem-url-authority, i.e.,
fStem is just the prefix for a set of log files, one per host/authority.
getUserAgent :: BrowserAction t String Source
getUserAgent returns the current User-Agent: default string.
setUserAgent :: String -> BrowserAction t () Source
setUserAgent ua sets the current User-Agent: string to ua. It
will be used if no explicit user agent header is found in subsequent requests.
A common form of user agent string is "name/version (details)". For
example "cabal-install/0.10.2 (HTTP 4000.1.2)". Including the version
of this HTTP package can be helpful if you ever need to track down HTTP
compatability quirks. This version is available via httpPackageVersion.
For more info see http://en.wikipedia.org/wiki/User_agent.
out :: String -> BrowserAction t () Source
err :: String -> BrowserAction t () Source
ioAction :: IO a -> BrowserAction t a Source
Deprecated: Use Control.Monad.Trans.liftIO instead.
Lifts an IO action into the BrowserAction monad.
defaultGETRequest_ :: BufferType a => URI -> Request a Source
uriDefaultTo :: URI -> URI -> URI Source
uriDefaultTo a b returns a URI that is consistent with the first
argument URI a when read in the context of the second URI b.
If the second argument is not sufficient context for determining
a full URI then anarchy reins.