Minio Go Client SDK for Amazon S3 Compatible Cloud Storage

The Minio Go Client SDK provides simple APIs to access any Amazon S3 compatible object storage.

Supported cloud storage providers:

• AWS Signature Version 4

  • Amazon S3
  • Minio

• AWS Signature Version 2

  • Google Cloud Storage (Compatibility Mode)
  • Openstack Swift + Swift3 middleware
  • Ceph Object Gateway
  • Riak CS

This quickstart guide will show you how to install the Minio client SDK, connect to Minio, and provide a walkthrough for a simple file uploader. For a complete list of APIs and examples, please take a look at the Go Client API Reference.

This document assumes that you have a working Go development environment.

Download from Github

go get -u github.com/minio/minio-go

Initialize Minio Client

Minio client requires the following four parameters specified to connect to an Amazon S3 compatible object storage.

package main

import (
	"github.com/minio/minio-go"
	"log"
)

func main() {
	endpoint := "play.minio.io:9000"
	accessKeyID := "Q3AM3UQ867SPQQA43P2F"
	secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
	useSSL := true

	// Initialize minio client object.
	minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
	if err != nil {
		log.Fatalln(err)
	}

	log.Printf("%#v\n", minioClient) // minioClient is now setup

Quick Start Example - File Uploader

This example program connects to an object storage server, creates a bucket and uploads a file to the bucket.

We will use the Minio server running at https://play.minio.io:9000 in this example. Feel free to use this service for testing and development. Access credentials shown in this example are open to the public.

FileUploader.go

package main

import (
	"github.com/minio/minio-go"
	"log"
)

func main() {
	endpoint := "play.minio.io:9000"
	accessKeyID := "Q3AM3UQ867SPQQA43P2F"
	secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
	useSSL := true

	// Initialize minio client object.
	minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
	if err != nil {
		log.Fatalln(err)
	}

	// Make a new bucket called mymusic.
	bucketName := "mymusic"
	location := "us-east-1"

	err = minioClient.MakeBucket(bucketName, location)
	if err != nil {
		// Check to see if we already own this bucket (which happens if you run this twice)
		exists, err := minioClient.BucketExists(bucketName)
		if err == nil && exists {
			log.Printf("We already own %s\n", bucketName)
		} else {
			log.Fatalln(err)
		}
	}
	log.Printf("Successfully created %s\n", bucketName)

	// Upload the zip file
	objectName := "golden-oldies.zip"
	filePath := "/tmp/golden-oldies.zip"
	contentType := "application/zip"

	// Upload the zip file with FPutObject
	n, err := minioClient.FPutObject(bucketName, objectName, filePath, contentType)
	if err != nil {
		log.Fatalln(err)
	}

	log.Printf("Successfully uploaded %s of size %d\n", objectName, n)
}

Run FileUploader

go run file-uploader.go
2016/08/13 17:03:28 Successfully created mymusic 
2016/08/13 17:03:40 Successfully uploaded golden-oldies.zip of size 16253413

mc ls play/mymusic/
[2016-05-27 16:02:16 PDT]  17MiB golden-oldies.zip

API Reference

The full API Reference is available here.

• Complete API Reference

API Reference : Bucket Operations

• MakeBucket
• ListBuckets
• BucketExists
• RemoveBucket
• ListObjects
• ListObjectsV2
• ListIncompleteUploads

API Reference : Bucket policy Operations

• SetBucketPolicy
• GetBucketPolicy
• ListBucketPolicies

API Reference : Bucket notification Operations

• SetBucketNotification
• GetBucketNotification
• RemoveAllBucketNotification
• ListenBucketNotification (Minio Extension)

API Reference : File Object Operations

• FPutObject
• FGetObject

API Reference : Object Operations

• GetObject
• PutObject
• PutObjectStreaming
• StatObject
• CopyObject
• RemoveObject
• RemoveObjects
• RemoveIncompleteUpload

API Reference: Encrypted Object Operations

• GetEncryptedObject
• PutEncryptedObject

API Reference : Presigned Operations

• PresignedGetObject
• PresignedPutObject
• PresignedHeadObject
• PresignedPostPolicy

API Reference : Client custom settings

• SetAppInfo
• SetCustomTransport
• TraceOn
• TraceOff

Full Examples

Full Examples : Bucket Operations

• makebucket.go
• listbuckets.go
• bucketexists.go
• removebucket.go
• listobjects.go
• listobjectsV2.go
• listincompleteuploads.go

Full Examples : Bucket policy Operations

• setbucketpolicy.go
• getbucketpolicy.go
• listbucketpolicies.go

Full Examples : Bucket notification Operations

• setbucketnotification.go
• getbucketnotification.go
• removeallbucketnotification.go
• listenbucketnotification.go (Minio Extension)

Full Examples : File Object Operations

• fputobject.go
• fgetobject.go

Full Examples : Object Operations

• putobject.go
• getobject.go
• statobject.go
• copyobject.go
• removeobject.go
• removeincompleteupload.go
• removeobjects.go

Full Examples : Encrypted Object Operations

• put-encrypted-object.go
• get-encrypted-object.go

Full Examples : Presigned Operations

• presignedgetobject.go
• presignedputobject.go
• presignedheadobject.go
• presignedpostpolicy.go

Explore Further

• Complete Documentation
• Minio Go Client SDK API Reference
• Go Music Player App Full Application Example

Contribute

Contributors Guide