1	/*
     2	Copyright 2014 The Perkeep Authors
     3	
     4	Licensed under the Apache License, Version 2.0 (the "License");
     5	you may not use this file except in compliance with the License.
     6	You may obtain a copy of the License at
     7	
     8	     http://www.apache.org/licenses/LICENSE-2.0
     9	
    10	Unless required by applicable law or agreed to in writing, software
    11	distributed under the License is distributed on an "AS IS" BASIS,
    12	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13	See the License for the specific language governing permissions and
    14	limitations under the License.
    15	*/
    16	
    17	package azure
    18	
    19	import (
    20		"context"
    21		"log"
    22	
    23		"perkeep.org/pkg/blob"
    24		"perkeep.org/pkg/blobserver"
    25	)
    26	
    27	var _ blobserver.MaxEnumerateConfig = (*azureStorage)(nil)
    28	
    29	func (sto *azureStorage) MaxEnumerate() int { return 5000 }
    30	
    31	func (sto *azureStorage) EnumerateBlobs(ctx context.Context, dest chan<- blob.SizedRef, after string, limit int) (err error) {
    32		defer close(dest)
    33		objs, err := sto.azureClient.ListBlobs(ctx, sto.container, 5000)
    34		if err != nil {
    35			log.Printf("azure ListBlobs: %v", err)
    36			return err
    37		}
    38		for _, obj := range objs {
    39			if obj.Name <= after {
    40				continue
    41			}
    42			br, ok := blob.Parse(obj.Name)
    43			if !ok {
    44				continue
    45			}
    46			select {
    47			case dest <- blob.SizedRef{Ref: br, Size: uint32(obj.Properties.ContentLength)}:
    48			case <-ctx.Done():
    49				return ctx.Err()
    50			}
    51			limit--
    52			if limit == 0 {
    53				return nil
    54			}
    55		}
    56		return nil
    57	}