github.com/minio/minio-go/v6@v6.0.57/examples/s3/getobject-context.go (about)

     1  // +build ignore
     2  
     3  /*
     4   * MinIO Go Library for Amazon S3 Compatible Cloud Storage
     5   * Copyright 2017 MinIO, Inc.
     6   *
     7   * Licensed under the Apache License, Version 2.0 (the "License");
     8   * you may not use this file except in compliance with the License.
     9   * You may obtain a copy of the License at
    10   *
    11   *     http://www.apache.org/licenses/LICENSE-2.0
    12   *
    13   * Unless required by applicable law or agreed to in writing, software
    14   * distributed under the License is distributed on an "AS IS" BASIS,
    15   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16   * See the License for the specific language governing permissions and
    17   * limitations under the License.
    18   */
    19  
    20  package main
    21  
    22  import (
    23  	"io"
    24  	"log"
    25  	"os"
    26  	"time"
    27  
    28  	"context"
    29  
    30  	"github.com/minio/minio-go/v6"
    31  )
    32  
    33  func main() {
    34  	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-bucketname, my-objectname and
    35  	// my-testfile are dummy values, please replace them with original values.
    36  
    37  	// Requests are always secure (HTTPS) by default. Set secure=false to enable insecure (HTTP) access.
    38  	// This boolean value is the last argument for New().
    39  
    40  	// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
    41  	// determined based on the Endpoint value.
    42  
    43  	s3Client, err := minio.New("s3.amazonaws.com", "YOUR-ACCESS-KEY-HERE", "YOUR-SECRET-KEY-HERE", true)
    44  	if err != nil {
    45  		log.Fatalln(err)
    46  	}
    47  
    48  	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
    49  	defer cancel()
    50  
    51  	opts := minio.GetObjectOptions{}
    52  	opts.SetModified(time.Now().Round(10 * time.Minute)) // get object if was modified within the last 10 minutes
    53  	reader, err := s3Client.GetObjectWithContext(ctx, "my-bucketname", "my-objectname", opts)
    54  	if err != nil {
    55  		log.Fatalln(err)
    56  	}
    57  	defer reader.Close()
    58  
    59  	localFile, err := os.Create("my-testfile")
    60  	if err != nil {
    61  		log.Fatalln(err)
    62  	}
    63  	defer localFile.Close()
    64  
    65  	stat, err := reader.Stat()
    66  	if err != nil {
    67  		log.Fatalln(err)
    68  	}
    69  
    70  	if _, err := io.CopyN(localFile, reader, stat.Size); err != nil {
    71  		log.Fatalln(err)
    72  	}
    73  }