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

     1  // +build ignore
     2  
     3  /*
     4   * MinIO Go Library for Amazon S3 Compatible Cloud Storage
     5   * Copyright 2015-2017 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  	"log"
    24  
    25  	minio "github.com/minio/minio-go/v6"
    26  	"github.com/minio/minio-go/v6/pkg/encrypt"
    27  )
    28  
    29  func main() {
    30  	// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-testfile, my-bucketname and
    31  	// my-objectname are dummy values, please replace them with original values.
    32  
    33  	// Requests are always secure (HTTPS) by default. Set secure=false to enable insecure (HTTP) access.
    34  	// This boolean value is the last argument for New().
    35  
    36  	// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
    37  	// determined based on the Endpoint value.
    38  	s3Client, err := minio.New("s3.amazonaws.com", "YOUR-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
    39  	if err != nil {
    40  		log.Fatalln(err)
    41  	}
    42  
    43  	// Enable trace.
    44  	// s3Client.TraceOn(os.Stderr)
    45  
    46  	// Prepare source decryption key (here we assume same key to
    47  	// decrypt all source objects.)
    48  	decKey, _ := encrypt.NewSSEC([]byte{1, 2, 3})
    49  
    50  	// Source objects to concatenate. We also specify decryption
    51  	// key for each
    52  	src1 := minio.NewSourceInfo("bucket1", "object1", decKey)
    53  	src1.SetMatchETagCond("31624deb84149d2f8ef9c385918b653a")
    54  
    55  	src2 := minio.NewSourceInfo("bucket2", "object2", decKey)
    56  	src2.SetMatchETagCond("f8ef9c385918b653a31624deb84149d2")
    57  
    58  	src3 := minio.NewSourceInfo("bucket3", "object3", decKey)
    59  	src3.SetMatchETagCond("5918b653a31624deb84149d2f8ef9c38")
    60  
    61  	// Create slice of sources.
    62  	srcs := []minio.SourceInfo{src1, src2, src3}
    63  
    64  	// Prepare destination encryption key
    65  	encKey, _ := encrypt.NewSSEC([]byte{8, 9, 0})
    66  
    67  	// Create destination info
    68  	dst, err := minio.NewDestinationInfo("bucket", "object", encKey, nil)
    69  	if err != nil {
    70  		log.Fatalln(err)
    71  	}
    72  
    73  	err = s3Client.ComposeObject(dst, srcs)
    74  	if err != nil {
    75  		log.Fatalln(err)
    76  	}
    77  
    78  	log.Println("Composed object successfully.")
    79  }