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azure_blob.go
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azure_blob.go
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/*
Copyright 2021 The KEDA Authors
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 azure
import (
"context"
"github.com/Azure/azure-storage-blob-go/azblob"
"github.com/gobwas/glob"
kedav1alpha1 "github.com/kedacore/keda/v2/apis/keda/v1alpha1"
"github.com/kedacore/keda/v2/pkg/util"
)
type BlobMetadata struct {
TargetBlobCount int64
ActivationTargetBlobCount int64
BlobContainerName string
BlobDelimiter string
BlobPrefix string
Connection string
AccountName string
EndpointSuffix string
TriggerIndex int
GlobPattern *glob.Glob
}
// GetAzureBlobListLength returns the count of the blobs in blob container in int
func GetAzureBlobListLength(ctx context.Context, httpClient util.HTTPDoer, podIdentity kedav1alpha1.AuthPodIdentity, meta *BlobMetadata) (int64, error) {
credential, endpoint, err := ParseAzureStorageBlobConnection(ctx, httpClient, podIdentity, meta.Connection, meta.AccountName, meta.EndpointSuffix)
if err != nil {
return -1, err
}
listBlobsSegmentOptions := azblob.ListBlobsSegmentOptions{
Prefix: meta.BlobPrefix,
}
p := azblob.NewPipeline(credential, azblob.PipelineOptions{})
serviceURL := azblob.NewServiceURL(*endpoint, p)
containerURL := serviceURL.NewContainerURL(meta.BlobContainerName)
if meta.GlobPattern != nil {
props, err := containerURL.ListBlobsFlatSegment(ctx, azblob.Marker{}, azblob.ListBlobsSegmentOptions{})
if err != nil {
return -1, err
}
var count int64
globPattern := *meta.GlobPattern
for _, blobItem := range props.Segment.BlobItems {
if globPattern.Match(blobItem.Name) {
count++
}
}
return count, nil
}
props, err := containerURL.ListBlobsHierarchySegment(ctx, azblob.Marker{}, meta.BlobDelimiter, listBlobsSegmentOptions)
if err != nil {
return -1, err
}
return int64(len(props.Segment.BlobItems)), nil
}