Network.Wai.Middleware.Delegate

Provides a WAI middleware that delegates handling of requests.

Provides 3 combinators that create middleware along with supporting data types.

• delegateTo: delegates handling of requests matching a predicate to a delegate Application
• delegateToProxy: delegates handling of requests matching a predicate to different host
• simpleProxy: is a simple reverse proxy, based on proxyApp of http-proxy by Erik de Castro Lopo/Michael Snoyman

Middleware

delegateTo :: Application -> RequestPredicate -> Middleware

Create a middleware that handles all requests matching a predicate by delegating to an alternate Application.

delegateToProxy :: ProxySettings -> Manager -> RequestPredicate -> Middleware

Creates a middleware that handles all requests matching a predicate by proxing them to a host specified by ProxySettings.

simpleProxy :: ProxySettings -> Manager -> Application

A Wai Application that acts as a http/https proxy.

Configuration

data ProxySettings

Settings that configure the proxy endpoint.

Constructors

ProxySettings

Fields

• proxyOnException :: SomeException -> Response

  What to do with exceptions thrown by either the application or server.

• proxyTimeout :: Int

  Timeout value in seconds. Default value: 30

• proxyHost :: ByteString

  The host being proxied

• proxyRedirectCount :: Int

  The number of redirects to follow. 0 means none, which is the default.

defaultSettings :: ProxySettings

A default ProxySettings that makes simplistic assumptions, e.g, that target host is localhost

Aliases

type RequestPredicate = Request -> Bool

Type alias for a function that determines if a request should be handled by a delegate.