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Monthly Downloads: 35
Programming language: Haskell
License: MIT License
Tags: Web     Servant    

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README

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" ] }

See Also