The MinIO Haskell Client SDK provides simple APIs to access MinIO and any Amazon S3 compatible object storage.
This guide assumes that you have a working Haskell development environment.
Simply add minio-hs to your project's .cabal dependencies section or if you are using hpack, to your package.yaml file as usual.
Try it out in a REPL
Download the library source and change to the extracted directory:
$ cabal get minio-hs
$ cd minio-hs-1.6.0/ # directory name could be differentThen load the ghci REPL environment with the library and browse the available APIs:
$ cabal repl
ghci> :browse Network.MinioFrom your home folder or any non-haskell project directory, just run:
stack install minio-hsThen start an interpreter session and browse the available APIs with:
$ stack ghci
> :browse Network.MinioThe examples folder contains many examples that you can try out and use to learn and to help with developing your own projects.
This example program connects to a MinIO object storage server, makes a bucket on the server and then uploads a file to the bucket.
We will use the MinIO server running at https://play.min.io in this example. Feel free to use this service for testing and development. Access credentials are present in the library and are open to the public.
#!/usr/bin/env stack
-- stack --resolver lts-14.11 runghc --package minio-hs --package optparse-applicative --package filepath
--
-- MinIO Haskell SDK, (C) 2017-2019 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 #-}
{-# LANGUAGE ScopedTypeVariables #-}
import Network.Minio
import Data.Monoid ((<>))
import Data.Text (pack)
import Options.Applicative
import System.FilePath.Posix
import UnliftIO (throwIO, try)
import Prelude
-- | The following example uses minio's play server at
-- https://play.min.io. The endpoint and associated
-- credentials are provided via the libary constant,
--
-- > minioPlayCI :: ConnectInfo
--
-- optparse-applicative package based command-line parsing.
fileNameArgs :: Parser FilePath
fileNameArgs = strArgument
(metavar "FILENAME"
<> help "Name of file to upload to AWS S3 or a MinIO server")
cmdParser = info
(helper <*> fileNameArgs)
(fullDesc
<> progDesc "FileUploader"
<> header
"FileUploader - a simple file-uploader program using minio-hs")
main :: IO ()
main = do
let bucket = "my-bucket"
-- Parse command line argument
filepath <- execParser cmdParser
let object = pack $ takeBaseName filepath
res <- runMinio minioPlayCI $ do
-- Make a bucket; catch bucket already exists exception if thrown.
bErr <- try $ makeBucket bucket Nothing
-- If the bucket already exists, we would get a specific
-- `ServiceErr` exception thrown.
case bErr of
Left BucketAlreadyOwnedByYou -> return ()
Left e -> throwIO e
Right _ -> return ()
-- Upload filepath to bucket; object name is derived from filepath.
fPutObject bucket object filepath defaultPutObjectOptions
case res of
Left e -> putStrLn $ "file upload failed due to " ++ show e
Right () -> putStrLn "file upload succeeded."./FileUploader.hs "path/to/my/file"
$ git clone https://github.com/minio/minio-hs.git
$ cd minio-hs/With cabal:
$ # Configure cabal for development enabling all optional flags defined by the package.
$ cabal configure --enable-tests --test-show-details=direct -fexamples -fdev -flive-test
$ cabal buildWith stack:
$ stack build --test --no-run-tests --flag minio-hs:live-test --flag minio-hs:dev --flag minio-hs:examplesA section of the tests use the remote MinIO Play server at https://play.min.io by default. For library development, using this remote server maybe slow. To run the tests against a locally running MinIO live server at http://localhost:9000 with the credentials access_key=minio and secret_key=minio123, just set the environment MINIO_LOCAL to any value (and unset it to switch back to Play).
With cabal:
$ export MINIO_LOCAL=1 # to run live tests against local MinIO server
$ cabal testWith stack:
$ export MINIO_LOCAL=1 # to run live tests against local MinIO server
stack test --flag minio-hs:live-test --flag minio-hs:devThis will run all the test suites.
$ cabal haddock
$ # OR
$ stack haddock
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