syncthing/vendor/github.com/minio/minio-go/examples/s3/getobject-context.go

// +build ignore

/*
 * Minio Go Library for Amazon S3 Compatible Cloud Storage
 * Copyright 2017 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.
 */

package main

import (
	"io"
	"log"
	"os"
	"time"

	"context"

	"github.com/minio/minio-go"
)

func main() {
	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-bucketname, my-objectname and
	// my-testfile are dummy values, please replace them with original values.

	// Requests are always secure (HTTPS) by default. Set secure=false to enable insecure (HTTP) access.
	// This boolean value is the last argument for New().

	// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
	// determined based on the Endpoint value.

	s3Client, err := minio.New("s3.amazonaws.com", "YOUR-ACCESS-KEY-HERE", "YOUR-SECRET-KEY-HERE", true)
	if err != nil {
		log.Fatalln(err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
	defer cancel()

	opts := minio.GetObjectOptions{}
	opts.SetModified(time.Now().Round(10 * time.Minute)) // get object if was modified within the last 10 minutes
	reader, err := s3Client.GetObjectWithContext(ctx, "my-bucketname", "my-objectname", opts)
	if err != nil {
		log.Fatalln(err)
	}
	defer reader.Close()

	localFile, err := os.Create("my-testfile")
	if err != nil {
		log.Fatalln(err)
	}
	defer localFile.Close()

	stat, err := reader.Stat()
	if err != nil {
		log.Fatalln(err)
	}

	if _, err := io.CopyN(localFile, reader, stat.Size); err != nil {
		log.Fatalln(err)
	}
}