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https://github.com/unclechu/gRPC-haskell.git
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9a3be32ed7
* echo client/server example: dead code removal, add command line params, improve output messages * Add nix-build result to .gitignore * Merge echo-client and echo-server directories to echo-hs/ directory; rename main modules accordingly * Use our protobuf compiler to generate bindings for the Echo service * Simplify echo.proto to just one endpoint; use highlevel client/server interfaces and codegen for echo example * Remove repetition counts and thread spawns from echo client, parameterize payload * Update default.nix
43 lines
1.8 KiB
Haskell
43 lines
1.8 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE OverloadedLists #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE TypeOperators #-}
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import Data.ByteString (ByteString)
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import Data.Maybe (fromMaybe)
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import GHC.Generics (Generic)
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import Network.GRPC.HighLevel.Generated (GRPCMethodType (..),
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Host (..), Port (..),
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ServerRequest (..),
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ServerResponse (..),
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StatusCode (..),
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defaultServiceOptions,
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serverHost, serverPort)
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import Options.Generic
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import Echo
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data Args = Args
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{ bind :: Maybe ByteString <?> "grpc endpoint hostname (default \"localhost\")"
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, port :: Maybe Int <?> "grpc endpoint port (default 50051)"
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} deriving (Generic, Show)
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instance ParseRecord Args
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doEcho :: ServerRequest 'Normal EchoRequest EchoResponse
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-> IO (ServerResponse 'Normal EchoResponse)
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doEcho (ServerNormalRequest _meta (EchoRequest pay)) = do
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return (ServerNormalResponse (EchoResponse pay) mempty StatusOk "")
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main :: IO ()
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main = do
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Args{..} <- getRecord "Runs the echo service"
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let opts = defaultServiceOptions
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{ serverHost = Host . fromMaybe "localhost" . unHelpful $ bind
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, serverPort = Port . fromMaybe 50051 . unHelpful $ port
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}
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echoServer Echo{ echoDoEcho = doEcho } opts
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