Extract wai example and common code to another library

rollbar-wai/.gitignore

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+.stack-work/
+*~

rollbar-wai/ChangeLog.md

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+# Changelog for rollbar-wai
+
+## Unreleased changes

rollbar-wai/LICENSE

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+Copyright Author name here (c) 2020
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

rollbar-wai/README.md

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+# rollbar-wai

rollbar-wai/Setup.hs

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+import Distribution.Simple
+main = defaultMain

rollbar-wai/examples/warp/Main.hs

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+{-# LANGUAGE OverloadedStrings #-}
+
+module Main
+  ( main
+  ) where
+
+import qualified Data.ByteString.Char8 as BS
+
+import Network.Wai
+import Network.Wai.Handler.Warp hiding (Settings)
+import Rollbar.Client.Settings (Settings(..))
+import Rollbar.Wai (rollbarOnException)
+import System.Environment
+
+main :: IO ()
+main = do
+  settings <- getSettings
+  let warpSettings = setOnException (rollbarOnException settings) defaultSettings
+  runSettings warpSettings app
+
+getSettings :: IO Settings
+getSettings =
+  Settings <$> BS.pack <$> getEnv "ROLLBAR_TOKEN"
+           <*> pure "test"
+
+app :: Application
+app _ _ = error "Hello World"

rollbar-wai/package.yaml

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+name:                rollbar-wai
+version:             0.1.0.0
+github:              "githubuser/rollbar-wai"
+license:             BSD3
+author:              "Author name here"
+maintainer:          "[email protected]"
+copyright:           "2020 Author name here"
+
+extra-source-files:
+- README.md
+- ChangeLog.md
+
+# Metadata used when publishing your package
+# synopsis:            Short description of your package
+# category:            Web
+
+# To avoid duplicated efforts in documentation and dealing with the
+# complications of embedding Haddock markup inside cabal files, it is
+# common to point users to the README.md file.
+description:         Please see the README on GitHub at <https://github.com/githubuser/rollbar-wai#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+
+library:
+  source-dirs: src
+  dependencies:
+    - aeson
+    - bytestring
+    - case-insensitive
+    - http-types
+    - req
+    - rollbar-client
+    - text
+    - unordered-containers
+    - wai
+    - wai-extra
+
+executables:
+  warp:
+    source-dirs: examples/warp
+    main: Main.hs
+    ghc-options:
+      - -threaded
+      - -rtsopts
+      - -with-rtsopts=-N
+    dependencies:
+      - bytestring
+      - rollbar-client
+      - rollbar-wai
+      - wai
+      - warp
+
+tests:
+  rollbar-wai-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - rollbar-wai

rollbar-wai/rollbar-wai.cabal

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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.33.0.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 029b25ee4af89209b19ea5db70b84dee6cd13de9f8de212543a7b241f65e6b96
+
+name:           rollbar-wai
+version:        0.1.0.0
+description:    Please see the README on GitHub at <https://github.com/githubuser/rollbar-wai#readme>
+homepage:       https://github.com/githubuser/rollbar-wai#readme
+bug-reports:    https://github.com/githubuser/rollbar-wai/issues
+author:         Author name here
+maintainer:     [email protected]
+copyright:      2020 Author name here
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://github.com/githubuser/rollbar-wai
+
+library
+  exposed-modules:
+      Rollbar.Wai
+  other-modules:
+      Paths_rollbar_wai
+  hs-source-dirs:
+      src
+  build-depends:
+      aeson
+    , base >=4.7 && <5
+    , bytestring
+    , case-insensitive
+    , http-types
+    , req
+    , rollbar-client
+    , text
+    , unordered-containers
+    , wai
+    , wai-extra
+  default-language: Haskell2010
+
+executable warp
+  main-is: Main.hs
+  other-modules:
+      Paths_rollbar_wai
+  hs-source-dirs:
+      examples/warp
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , bytestring
+    , rollbar-client
+    , rollbar-wai
+    , wai
+    , warp
+  default-language: Haskell2010
+
+test-suite rollbar-wai-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_rollbar_wai
+  hs-source-dirs:
+      test
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , rollbar-wai
+  default-language: Haskell2010

rollbar-wai/src/Rollbar/Wai.hs

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+{-# LANGUAGE OverloadedStrings #-}
+
+module Rollbar.Wai
+  ( rollbarOnException
+  ) where
+
+import qualified Data.ByteString.Lazy as BSL
+import qualified Data.CaseInsensitive as CI
+import qualified Data.HashMap.Strict as HM
+import qualified Data.Text.Encoding as T
+import qualified Network.Wai as W
+import qualified Network.Wai.Parse as W
+
+import Control.Concurrent (forkIO)
+import Control.Exception
+import Control.Monad (void)
+import Control.Monad.IO.Class (MonadIO(..))
+import Data.Aeson
+import Data.Bool
+import Network.HTTP.Req (defaultHttpConfig)
+import Network.HTTP.Types (renderQuery)
+import Rollbar.Client
+import Rollbar.Client.Item
+import Rollbar.Client.Settings
+
+rollbarOnException :: Settings -> Maybe W.Request -> SomeException -> IO ()
+rollbarOnException settings mreq ex = void $ forkIO $
+  runRollbar defaultHttpConfig settings $ do
+    rdata <- mkData $ PayloadTrace $ Trace [] $ mkExceptionFromSomeException ex
+    rreq <- mapM mkRequest mreq
+    let item = Item rdata { dataRequest = rreq }
+    void $ createItem item
+
+mkRequest :: MonadIO m => W.Request -> m Request
+mkRequest req = liftIO $ do
+  (params, _) <- W.parseRequestBody ignoreFilesBackEnd req
+  body <- T.decodeUtf8 . BSL.toStrict <$> W.strictRequestBody req
+  return Request
+    { requestUrl = maybe "" toUrl $ W.requestHeaderHost req
+    , requestMethod = T.decodeUtf8 $ W.requestMethod req
+    , requestHeaders = HM.fromList $ fmap toHeader $ W.requestHeaders req
+    , requestParams = mempty
+    , requestGet = HM.fromList $ fmap toQuery $ W.queryString req
+    , requestQueryStrings = T.decodeUtf8 $ renderQuery False $ W.queryString req
+    , requestPost = HM.fromList $ fmap toParam params
+    , requestBody = body
+    , requestUserIp = ""
+    }
+  where
+    toUrl host = T.decodeUtf8 $ mconcat
+      -- TODO: guessAppRoot
+      [ bool "http" "https" $ W.isSecure req
+      , "://"
+      , host
+      , W.rawPathInfo req
+      , W.rawQueryString req
+      ]
+    toHeader (key, value) =
+      (T.decodeUtf8 $ CI.original key, toJSON $ T.decodeUtf8 value)
+    toQuery (key, value) =
+      (T.decodeUtf8 key, toJSON $ T.decodeUtf8 <$> value)
+    toParam (key, value) =
+      (T.decodeUtf8 key, toJSON $ T.decodeUtf8 value)
+
+ignoreFilesBackEnd :: W.BackEnd ()
+ignoreFilesBackEnd _ _ _ = pure ()

rollbar-wai/test/Spec.hs

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+main :: IO ()
+main = putStrLn "Test suite not yet implemented"