diff --git a/ChangeLog.md b/ChangeLog.md new file mode 100644 --- /dev/null +++ b/ChangeLog.md @@ -0,0 +1,3 @@ +# Changelog for r3x-haskell-sdk + +## Unreleased changes diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [2018] [RubixFunctions] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/README.md b/README.md new file mode 100644 --- /dev/null +++ b/README.md @@ -0,0 +1,35 @@ +# RubiX Haskell SDK + +[![CircleCI](https://circleci.com/gh/rubixFunctions/r3x-haskell-sdk.svg?style=svg)](https://circleci.com/gh/rubixFunctions/r3x-haskell-sdk) +[![License](https://img.shields.io/badge/-Apache%202.0-blue.svg)](https://opensource.org/s/Apache-2.0) + +## Prerequisites +Stack is needed to build and execute SDK, it can be downloaded from [here](https://www.haskell.org/downloads/) + +## Usage +To build the SDK run : +``` +$ stack build +``` +To execute SDK run : +``` +$ stack exec r3x-haskell-sdk-exe +``` +alternatively you can run the script `run.sh`: +``` +$ ./run.sh +``` + +## Verify +To quickly verify the SDK you can use the pre build example image by: +``` +$ docker run -p 8080:8080 quay.io/rubixfunctions/haskell-sdk +$ curl localhost:8080 + {"message":"Hello RubiX!!!"}% +``` + +## Documentation +For full information on how to use the SDK and deploy a function to Knative, refer to our [Documentation here.](https://github.com/rubixFunctions/r3x-docs/blob/master/README.md) + +## License +This project is licensed under the Apache 2.0 License - see the [LICENSE](LICENSE) file for details diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/app/Main.hs b/app/Main.hs new file mode 100644 --- /dev/null +++ b/app/Main.hs @@ -0,0 +1,28 @@ +{-# language OverloadedStrings #-} +{-# language DeriveAnyClass #-} +{-# language DeriveGeneric #-} +module Main where + +import Rubix +import Data.Aeson (ToJSON, FromJSON) +import GHC.Generics (Generic) +import qualified Data.Text as DT +import qualified Network.Wai as NW + +data Message = Message + { + message :: DT.Text + } deriving (Generic, ToJSON, FromJSON) + +rubixMessage :: Message +rubixMessage = Message{message="Hello RubiX!!!"} + +-- Define a response handler +rubixHandler :: Handler NW.Response +rubixHandler = do + let res = toResponse $ Json rubixMessage + return res + +-- Start the server +main :: IO () +main = execute rubixHandler diff --git a/r3x-haskell-sdk.cabal b/r3x-haskell-sdk.cabal new file mode 100644 --- /dev/null +++ b/r3x-haskell-sdk.cabal @@ -0,0 +1,106 @@ +cabal-version: 1.12 + +-- This file has been generated from package.yaml by hpack version 0.31.1. +-- +-- see: https://github.com/sol/hpack +-- +-- hash: 63ec36141b4ba25539fe2fbbd0602a6ff2d6cc3f8ea86e26a909ac4b3a53abf5 + +name: r3x-haskell-sdk +version: 0.1.0.0 +description: Please see the README on GitHub at +homepage: https://github.com/rubixfunctions/r3x-haskell-sdk#readme +bug-reports: https://github.com/rubixfunctions/r3x-haskell-sdk/issues +author: RubiXFunctions +maintainer: r3xfunctions@gmail.com +copyright: 2019 RubiXFunctions +license: BSD3 +license-file: LICENSE +build-type: Simple +extra-source-files: + README.md + ChangeLog.md + +source-repository head + type: git + location: https://github.com/rubixfunctions/r3x-haskell-sdk + +library + exposed-modules: + Rubix + RubiX.RubixHandler + RubiX.RubixRequest + RubiX.RubixResponse + RubiX.Types + RubiX.Utils + other-modules: + Paths_r3x_haskell_sdk + hs-source-dirs: + src + build-depends: + aeson + , base >=4.7 && <5 + , blaze-html + , bytestring + , case-insensitive + , containers + , cookie + , http-types + , mtl + , regex-pcre + , text + , transformers + , wai + , warp + default-language: Haskell2010 + +executable r3x-haskell-sdk-exe + main-is: Main.hs + other-modules: + Paths_r3x_haskell_sdk + hs-source-dirs: + app + ghc-options: -threaded -rtsopts -with-rtsopts=-N + build-depends: + aeson + , base >=4.7 && <5 + , blaze-html + , bytestring + , case-insensitive + , containers + , cookie + , http-types + , mtl + , r3x-haskell-sdk + , regex-pcre + , text + , transformers + , wai + , warp + default-language: Haskell2010 + +test-suite r3x-haskell-sdk-test + type: exitcode-stdio-1.0 + main-is: Spec.hs + other-modules: + Paths_r3x_haskell_sdk + hs-source-dirs: + test + ghc-options: -threaded -rtsopts -with-rtsopts=-N + build-depends: + aeson + , base >=4.7 && <5 + , blaze-html + , bytestring + , case-insensitive + , containers + , cookie + , http-types + , mtl + , r3x-haskell-sdk + , regex-pcre + , text + , transformers + , wai + , warp + default-language: Haskell2010 diff --git a/src/RubiX/RubixHandler.hs b/src/RubiX/RubixHandler.hs new file mode 100644 --- /dev/null +++ b/src/RubiX/RubixHandler.hs @@ -0,0 +1,17 @@ +{-# language OverloadedStrings #-} +{-# language FlexibleContexts #-} +module RubiX.RubixHandler + ( route + ) where + +import RubiX.Types +import RubiX.RubixRequest +import RubiX.RubixResponse +import Control.Monad + +-- Run a handler to match declared routes +route :: ToResponse a => Pattern -> Handler a -> App () +route routePath handler = do + doesPathMatch <- matchPaths routePath + when doesPathMatch $ respondWith handler + diff --git a/src/RubiX/RubixRequest.hs b/src/RubiX/RubixRequest.hs new file mode 100644 --- /dev/null +++ b/src/RubiX/RubixRequest.hs @@ -0,0 +1,101 @@ +{-# language OverloadedStrings #-} +{-# language FlexibleContexts #-} +{-# language ConstraintKinds #-} +{-# language ViewPatterns #-} +module RubiX.RubixRequest + ( getPath + , getPathInfo + , getMethod + , getQueryString + , getQueries + , getQueriesMulti + , getQuery + , getQueryMulti + , getHeader + , getHeaderMulti + , getHeaders + , getBody + , checkSecure + , waiRequest + , matchPaths + ) where + +import Control.Monad.Reader +import Data.Maybe +import Data.Bifunctor +import qualified Data.Text as DT +import qualified Data.Map as DM +import qualified Data.CaseInsensitive as DCI +import Text.Regex.PCRE +import qualified Network.Wai as NW + +import RubiX.Utils +import RubiX.Types + +type ReqReader b = MonadReader ReqContext b + +fromReq :: ReqReader b => (NW.Request -> a) -> b a +fromReq getter = asks (getter . request) + +-- Gets the headers of the request +getHeader :: ReqReader b => DT.Text -> b (Maybe DT.Text) +getHeader key = listToMaybe <$> getHeaderMulti key + +-- Gets the headers of the request +getHeaderMulti :: ReqReader b => DT.Text -> b [DT.Text] +getHeaderMulti key = fromMaybe [] . DM.lookup (DCI.mk key) <$> getHeaders + +-- Gets the headers of the request +getHeaders :: ReqReader b => b HeaderMap +getHeaders = convertHeaders <$> fromReq NW.requestHeaders + +-- Gets path and returns the full path of the current request +getPath :: ReqReader b => b DT.Text +getPath = fromByteString <$> fromReq NW.rawPathInfo + +-- Gets the HTTP method of the current request +getMethod :: ReqReader b => b DT.Text +getMethod = fromByteString <$> fromReq NW.requestMethod + +-- Gets query string and returns the full path of the current request +getQueryString :: ReqReader b => b DT.Text +getQueryString = fromByteString <$> fromReq NW.rawQueryString + +-- Gets full body of the request +getBody :: ReqReader b => b DT.Text +getBody = asks requestBody + +-- Calls through to 'Wai.isSecure' +checkSecure :: ReqReader b => b Bool +checkSecure = fromReq NW.isSecure + +-- Returns the path's individual '/' separated chunks. +getPathInfo :: ReqReader b => b [DT.Text] +getPathInfo = fromReq NW.pathInfo + +-- Exposes the underlying 'Wai.Request'. +waiRequest :: ReqReader b => b NW.Request +waiRequest = asks request + +-- Gets all key/values from the query string +getQueriesMulti :: ReqReader b => b MultiQueryMap +getQueriesMulti = convertQueries <$> fromReq NW.queryString + +-- Get the last set value for each query +getQueries :: ReqReader b => b QueryMap +getQueries = simpleQuery <$> fromReq NW.queryString + +-- Gets all values provided for a given query key +getQueryMulti :: ReqReader b => DT.Text -> b [DT.Text] +getQueryMulti key = fromMaybe [] . DM.lookup key <$> getQueriesMulti + +-- Get the value for a given query +getQuery :: ReqReader b => DT.Text -> b (Maybe DT.Text) +getQuery key = DM.lookup key <$> getQueries + +-- | Determine whether a route matches a pattern +matchPaths :: ReqReader b => Pattern -> b Bool +matchPaths pattern = checkMatch pattern <$> getPath + where + checkMatch :: Pattern -> Route -> Bool + checkMatch (DT.unpack -> pat) (DT.unpack -> rt) = rt =~ ("^" ++ pat ++ "$") diff --git a/src/RubiX/RubixResponse.hs b/src/RubiX/RubixResponse.hs new file mode 100644 --- /dev/null +++ b/src/RubiX/RubixResponse.hs @@ -0,0 +1,66 @@ +{-# language FlexibleInstances #-} +{-# language OverloadedStrings #-} +module RubiX.RubixResponse + ( ToResponse(..) + , Json(..) + , respond + , respondWith + ) where + +import Data.Function ((&)) +import Control.Monad.Except +import qualified Data.Text as DT +import qualified Data.Text.Lazy as DTL +import Data.Aeson as Aeson + +import Network.Wai as NW +import Network.HTTP.Types.Status + +import Text.Blaze.Html (Html) +import Text.Blaze.Html.Renderer.Text (renderHtml) + +import RubiX.Utils +import RubiX.Types + +-- values should be JSON encoded sent with the "application/json" +newtype Json a = Json a + deriving Show + +-- This class represents all types which can be converted into a valid Response +class ToResponse c where + toResponse :: c -> NW.Response + +-- The following functions were inspried by Happstack server response +instance ToResponse Aeson.Value where + toResponse = makeResponse ok200 "application/json" . fromLazyByteString . encode + +instance ToResponse String where + toResponse = makeResponse ok200 "text/plain" . DT.pack + +instance ToResponse DT.Text where + toResponse = makeResponse ok200 "text/plain" + +instance (ToJSON a) => ToResponse (Json a) where + toResponse (Json obj) = toResponse (toJSON obj) + +instance ToResponse NW.Response where + toResponse = id + +instance (ToResponse b) => ToResponse (b, Status) where + toResponse (b, status) = toResponse (b, status, mempty :: HeaderMap) + +instance (ToResponse b) => ToResponse (b, Status, HeaderMap) where + toResponse (b, status, hm) = + toResponse b + & mapResponseStatus (const status) + & mapResponseHeaders (++ fromHeaderMap hm) + +makeResponse :: Status -> ContentType -> DT.Text -> NW.Response +makeResponse status contentType body = + NW.responseLBS status [makeHeader "Content-Type" contentType] (toLazyByteString body) + +respond :: ToResponse a => a -> App () +respond = throwError . toResponse + +respondWith :: ToResponse a => Handler a -> App () +respondWith handler = runHandler handler >>= respond diff --git a/src/RubiX/Types.hs b/src/RubiX/Types.hs new file mode 100644 --- /dev/null +++ b/src/RubiX/Types.hs @@ -0,0 +1,42 @@ +module RubiX.Types where + +import Control.Monad.Reader +import Control.Monad.Except +import qualified Network.Wai as W +import qualified Data.Text as T +import qualified Data.Map as M +import qualified Data.CaseInsensitive as CI + +-- The main application definition monad +type App a = ReaderT ReqContext (ExceptT W.Response IO) a + +-- Handler is an alias for App type +type Handler a = ReaderT ReqContext IO a + +-- Context provided when handling any request +data ReqContext = ReqContext + { requestBody :: T.Text + , request :: W.Request + } + +-- Runs a handler within an App WITHOUT rendering the response +runHandler :: Handler r -> App r +runHandler handler = ask >>= liftIO . runReaderT handler + +-- A map of case insensitive header names to all provided values for that header. +type HeaderMap = M.Map (CI.CI T.Text) [T.Text] + +-- A map of query parameter names to all values provided for that parameter +type MultiQueryMap = M.Map T.Text [T.Text] + +-- A map of query parameter names to the last-provided value for that parameter +type QueryMap = M.Map T.Text T.Text + +-- A request or response's Content-Type value +type ContentType = T.Text + +-- A regex pattern for route matching. +type Pattern = T.Text + +-- A route as Text +type Route = T.Text diff --git a/src/RubiX/Utils.hs b/src/RubiX/Utils.hs new file mode 100644 --- /dev/null +++ b/src/RubiX/Utils.hs @@ -0,0 +1,53 @@ +{-# language OverloadedStrings #-} +module RubiX.Utils where + +import Data.Bifunctor +import Data.Maybe +import qualified Data.Map as DM +import qualified Data.ByteString as BS +import qualified Data.ByteString.Lazy as LBS +import qualified Data.Text.Lazy as LT +import qualified Data.Text.Lazy.Encoding as LT +import qualified Data.Text as T +import qualified Data.Text.Encoding as T +import qualified Data.CaseInsensitive as CI + +import qualified Network.HTTP.Types.Header as HTTP +import Network.HTTP.Types.URI + +import RubiX.Types + +toByteString :: T.Text -> BS.ByteString +toByteString = T.encodeUtf8 + +toLazyByteString :: T.Text -> LBS.ByteString +toLazyByteString = LT.encodeUtf8 . LT.fromStrict + +fromByteString :: BS.ByteString -> T.Text +fromByteString = T.decodeUtf8 + +fromLazyByteString :: LBS.ByteString -> T.Text +fromLazyByteString = LT.toStrict . LT.decodeUtf8 + +makeHeader :: T.Text -> T.Text -> HTTP.Header +makeHeader headerName headerVal = (CI.mk (toByteString headerName), toByteString headerVal) + +fromHeaderMap :: HeaderMap -> HTTP.ResponseHeaders +fromHeaderMap hm = do + (headerName, values) <- DM.toList hm + [(CI.map toByteString headerName, toByteString value) | value <- values] + +convertHeaders :: HTTP.RequestHeaders -> HeaderMap +convertHeaders = DM.fromListWith mappend . fmap (bimap mapName mapVal) + where + mapName = CI.map fromByteString + mapVal val = [fromByteString val] + +convertQueries :: Query -> MultiQueryMap +convertQueries = DM.fromListWith (flip mappend) . fmap (second maybeToList) . queriesToList + +simpleQuery :: Query -> QueryMap +simpleQuery = DM.fromListWith (flip const) . fmap (second (fromMaybe "")) . queriesToList + +queriesToList :: Query -> [(T.Text, Maybe T.Text)] +queriesToList = fmap $ bimap fromByteString $ fmap fromByteString diff --git a/src/Rubix.hs b/src/Rubix.hs new file mode 100644 --- /dev/null +++ b/src/Rubix.hs @@ -0,0 +1,71 @@ +{-# language OverloadedStrings #-} +module Rubix + ( + execute, + App, + Handler, + HeaderMap, + route, + runHandler, + getPath, + getPathInfo, + getMethod, + getQueryString, + getQueries, + getQueriesMulti, + getQuery, + getQueryMulti, + getHeaders, + getBody, + checkSecure, + waiRequest, + matchPaths, + ToResponse(..), + respond, + respondWith, + Json(..) + ) where + +import qualified Network.Wai.Handler.Warp as NW +import qualified Network.Wai as NW +import Network.HTTP.Types.Status +import qualified Data.Text as T + +import Control.Monad.Reader +import Control.Monad.Except + +import RubiX.Types +import RubiX.Utils +import RubiX.RubixRequest +import RubiX.RubixHandler +import RubiX.RubixResponse + +-- Start server +execute :: ToResponse a => Handler a -> IO() +execute rubixHandler = do + putStrLn $ "RubiX Server starting to listen on port 8080" + run 8080 $ rubixApp rubixHandler + +-- Set Route and Handler +rubixApp :: ToResponse a => Handler a -> App() +rubixApp rubixHandler = do + route "/" rubixHandler + +-- Execute the app monad +run:: NW.Port -> App() -> IO () +run port app = NW.run port warpApp + where + warpApp :: NW.Request -> (NW.Response -> IO NW.ResponseReceived) -> IO NW.ResponseReceived + warpApp req res = runRubix app req >>= res + +-- Run the app monad on a wai request to obtain a wai response +runRubix :: App () -> NW.Request -> IO NW.Response +runRubix app req = either id (const notFoundResp) <$> runExceptT unpackApp + where + unpackApp = do + reqBody <- fmap fromLazyByteString . liftIO $ NW.strictRequestBody req + runReaderT app ReqContext{request = req, requestBody = reqBody} + +-- Default 404 response +notFoundResp :: NW.Response +notFoundResp = undefined diff --git a/test/Spec.hs b/test/Spec.hs new file mode 100644 --- /dev/null +++ b/test/Spec.hs @@ -0,0 +1,2 @@ +main :: IO () +main = putStrLn "Test suite not yet implemented"