restic/vendor/github.com/minio/minio-go/examples/s3/listobjects-N.go

78 lines
2.3 KiB
Go

// +build ignore
/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage
* Copyright 2015-2017 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 (
"fmt"
"github.com/minio/minio-go"
)
func main() {
// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-bucketname and my-prefixname
// 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-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
if err != nil {
fmt.Println(err)
return
}
// List 'N' number of objects from a bucket-name with a matching prefix.
listObjectsN := func(bucket, prefix string, recursive bool, N int) (objsInfo []minio.ObjectInfo, err error) {
// Create a done channel to control 'ListObjects' go routine.
doneCh := make(chan struct{}, 1)
// Free the channel upon return.
defer close(doneCh)
i := 1
for object := range s3Client.ListObjects(bucket, prefix, recursive, doneCh) {
if object.Err != nil {
return nil, object.Err
}
i++
// Verify if we have printed N objects.
if i == N {
// Indicate ListObjects go-routine to exit and stop
// feeding the objectInfo channel.
doneCh <- struct{}{}
}
objsInfo = append(objsInfo, object)
}
return objsInfo, nil
}
// List recursively first 100 entries for prefix 'my-prefixname'.
recursive := true
objsInfo, err := listObjectsN("my-bucketname", "my-prefixname", recursive, 100)
if err != nil {
fmt.Println(err)
}
// Print all the entries.
fmt.Println(objsInfo)
}