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		"os"
    22	
    23		"go4.org/syncutil"
    24		"perkeep.org/pkg/blob"
    25		"perkeep.org/pkg/blobserver"
    26	)
    27	
    28	var statGate = syncutil.NewGate(20) // arbitrary
    29	
    30	func (sto *azureStorage) StatBlobs(ctx context.Context, blobs []blob.Ref, fn func(blob.SizedRef) error) (err error) {
    31		// TODO: use sto.cache
    32		return blobserver.StatBlobsParallelHelper(ctx, blobs, fn, statGate, func(br blob.Ref) (sb blob.SizedRef, err error) {
    33			size, err := sto.azureClient.Stat(ctx, br.String(), sto.container)
    34			if err == nil {
    35				return blob.SizedRef{Ref: br, Size: uint32(size)}, nil
    36			}
    37			if err == os.ErrNotExist {
    38				return sb, nil
    39			}
    40			return sb, err
    41		})
    42	}