minio-hs-1.6.0: examples/SelectObject.hs

#!/usr/bin/env stack
-- stack --resolver lts-14.11 runghc --package minio-hs

--
-- MinIO Haskell SDK, (C) 2019 MinIO, Inc.
--
-- 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.
--
{-# LANGUAGE OverloadedStrings #-}

import qualified Conduit as C
import Control.Monad (unless)
import Network.Minio
import Prelude

main :: IO ()
main = do
  let bucket = "selectbucket"
      object = "1.csv"
      content =
        "Name,Place,Temperature\n"
          <> "James,San Jose,76\n"
          <> "Alicia,San Leandro,88\n"
          <> "Mark,San Carlos,90\n"

  res <- runMinio minioPlayCI $ do
    exists <- bucketExists bucket
    unless exists $
      makeBucket bucket Nothing

    C.liftIO $ putStrLn "Uploading csv object"
    putObject bucket object (C.sourceLazy content) Nothing defaultPutObjectOptions

    let sr = selectRequest "Select * from s3object" defaultCsvInput defaultCsvOutput
    res <- selectObjectContent bucket object sr
    C.runConduit $ res C..| getPayloadBytes C..| C.stdoutC
  print res