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minio/pkg/fs/fs-filter.go

95 lines
3.3 KiB

/*
* Minio Cloud Storage, (C) 2015 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 fs
import (
"strings"
"github.com/minio/minio-xl/pkg/probe"
)
func (fs API) filterObjects(bucket string, content contentInfo, resources BucketResourcesMetadata) (ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
var err *probe.Error
var metadata ObjectMetadata
name := content.Prefix
switch true {
// Both delimiter and Prefix is present
case resources.Delimiter != "" && resources.Prefix != "":
if strings.HasPrefix(name, resources.Prefix) {
trimmedName := strings.TrimPrefix(name, resources.Prefix)
delimitedName := delimiter(trimmedName, resources.Delimiter)
switch true {
case name == resources.Prefix:
// Use resources.Prefix to filter out delimited file
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
case delimitedName == content.FileInfo.Name():
// Use resources.Prefix to filter out delimited files
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
if metadata.Mode.IsDir() {
resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
return ObjectMetadata{}, resources, nil
}
case delimitedName != "":
resources.CommonPrefixes = append(resources.CommonPrefixes, resources.Prefix+delimitedName)
}
}
// Delimiter present and Prefix is absent
case resources.Delimiter != "" && resources.Prefix == "":
delimitedName := delimiter(name, resources.Delimiter)
switch true {
case delimitedName == "":
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
case delimitedName == content.FileInfo.Name():
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
if metadata.Mode.IsDir() {
resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
return ObjectMetadata{}, resources, nil
}
case delimitedName != "":
resources.CommonPrefixes = append(resources.CommonPrefixes, delimitedName)
}
// Delimiter is absent and only Prefix is present
case resources.Delimiter == "" && resources.Prefix != "":
if strings.HasPrefix(name, resources.Prefix) {
// Do not strip prefix object output
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
}
default:
metadata, err = getMetadata(fs.path, bucket, name)
if err != nil {
return ObjectMetadata{}, resources, err.Trace()
}
}
sortUnique(resources.CommonPrefixes)
return metadata, resources, nil
}