Golang BucketResourcesMetadata.IsTruncated方法代碼示例

// ListObjects - GET bucket (list objects)
func (fs *fsDriver) ListObjects(bucket string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
	p := bucketDir{}
	p.files = make(map[string]os.FileInfo)

	if drivers.IsValidBucket(bucket) == false {
		return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
	}
	if resources.Prefix != "" && drivers.IsValidObjectName(resources.Prefix) == false {
		return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: resources.Prefix}, nil)
	}

	rootPrefix := filepath.Join(fs.root, bucket)
	// check bucket exists
	if _, err := os.Stat(rootPrefix); os.IsNotExist(err) {
		return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
	}

	p.root = rootPrefix
	err := filepath.Walk(rootPrefix, p.getAllFiles)
	if err != nil {
		return []drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
	}

	var metadataList []drivers.ObjectMetadata
	var metadata drivers.ObjectMetadata

	// Populate filtering mode
	resources.Mode = drivers.GetMode(resources)

	var fileNames []string
	for name := range p.files {
		fileNames = append(fileNames, name)
	}
	sort.Strings(fileNames)
	for _, name := range fileNames {
		if len(metadataList) >= resources.Maxkeys {
			resources.IsTruncated = true
			if resources.IsTruncated && resources.IsDelimiterSet() {
				resources.NextMarker = metadataList[len(metadataList)-1].Key
			}
			break
		}
		if name > resources.Marker {
			metadata, resources, err = fs.filterObjects(bucket, name, p.files[name], resources)
			if err != nil {
				return []drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
			}
			if metadata.Bucket != "" {
				metadataList = append(metadataList, metadata)
			}
		}
	}
	sort.Sort(byObjectKey(metadataList))
	return metadataList, resources, nil
}

// ListObjects - returns list of objects
func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
	errParams := map[string]string{
		"bucketName": bucketName,
	}
	if d.donut == nil {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.InternalError{}, errParams)
	}
	if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
	}
	if !drivers.IsValidObjectName(resources.Prefix) {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
	}
	actualObjects, commonPrefixes, isTruncated, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter,
		resources.Maxkeys)
	if err != nil {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
	}
	resources.CommonPrefixes = commonPrefixes
	resources.IsTruncated = isTruncated
	if resources.IsTruncated && resources.IsDelimiterSet() {
		resources.NextMarker = actualObjects[len(actualObjects)-1]
	}
	var results []drivers.ObjectMetadata
	for _, objectName := range actualObjects {
		objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
		if err != nil {
			return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
		}
		t, err := time.Parse(time.RFC3339Nano, objectMetadata["created"])
		if err != nil {
			return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, nil)
		}
		size, err := strconv.ParseInt(objectMetadata["size"], 10, 64)
		if err != nil {
			return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, nil)
		}
		metadata := drivers.ObjectMetadata{
			Key:     objectName,
			Created: t,
			Size:    size,
		}
		results = append(results, metadata)
	}
	sort.Sort(byObjectKey(results))
	return results, resources, nil
}

// ListObjects - list objects from cache
func (cache *cacheDriver) ListObjects(bucket string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
	cache.lock.RLock()
	defer cache.lock.RUnlock()
	if !drivers.IsValidBucket(bucket) {
		return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
	}
	if !drivers.IsValidObjectName(resources.Prefix) {
		return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
	}
	if _, ok := cache.storedBuckets[bucket]; ok == false {
		return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
	}
	var results []drivers.ObjectMetadata
	var keys []string
	storedBucket := cache.storedBuckets[bucket]
	for key := range storedBucket.objectMetadata {
		if strings.HasPrefix(key, bucket+"/") {
			key = key[len(bucket)+1:]
			keys, resources = cache.listObjects(keys, key, resources)
		}
	}
	var newKeys []string
	switch {
	case resources.Marker != "":
		for _, key := range keys {
			if key > resources.Marker {
				newKeys = appendUniq(newKeys, key)
			}
		}
	default:
		newKeys = keys
	}
	sort.Strings(newKeys)
	for _, key := range newKeys {
		if len(results) == resources.Maxkeys {
			resources.IsTruncated = true
			if resources.IsTruncated && resources.IsDelimiterSet() {
				resources.NextMarker = results[len(results)-1].Key
			}
			return results, resources, nil
		}
		object := storedBucket.objectMetadata[bucket+"/"+key]
		results = append(results, object)
	}
	return results, resources, nil
}

// ListObjects - returns list of objects
func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
	d.lock.RLock()
	defer d.lock.RUnlock()
	errParams := map[string]string{
		"bucketName": bucketName,
	}
	if d.donut == nil {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.InternalError{}, errParams)
	}
	if !drivers.IsValidBucket(bucketName) {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
	}
	if !drivers.IsValidObjectName(resources.Prefix) {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
	}
	listObjects, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter, resources.Maxkeys)
	if err != nil {
		return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
	}
	resources.CommonPrefixes = listObjects.CommonPrefixes
	resources.IsTruncated = listObjects.IsTruncated
	var results []drivers.ObjectMetadata
	for _, objMetadata := range listObjects.Objects {
		metadata := drivers.ObjectMetadata{
			Key:     objMetadata.Object,
			Created: objMetadata.Created,
			Size:    objMetadata.Size,
		}
		results = append(results, metadata)
	}
	sort.Sort(byObjectName(results))
	if resources.IsTruncated && resources.IsDelimiterSet() {
		resources.NextMarker = results[len(results)-1].Key
	}
	return results, resources, nil
}