Servant-Options
This library provides a middleware that returns HTTP OPTIONS responses for
valid application routes defined by your (Proxy :: Proxy api).
It is especially useful when trying to write an API that can be used
in a cross-origin capacity, as browsers will send "pre-flight" checks
by requesting OPTIONS for routes that are about to be called.
Before:
After:
Usage:
module MyApp where
import App
import Servant
import Network.Wai.Middleware.Cors
import Network.Wai.Middleware.Servant.Options
app :: Application
app = logStdoutDev
$ cors (const $ Just policy)
$ provideOptions apiProxy
$ serve apiProxy apiServer
where
policy = simpleCorsResourcePolicy
{ corsRequestHeaders = [ "content-type" ] }