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minio/pkg/fs/fs-bucket-listobjects.go

134 lines
3.4 KiB

/*
* Minio Cloud Storage, (C) 2015-2016 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 (
"fmt"
"net/url"
"os"
"path/filepath"
"strings"
"github.com/minio/minio/pkg/probe"
)
// ListObjects - lists all objects for a given prefix, returns up to
// maxKeys number of objects per call.
func (fs Filesystem) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsResult, *probe.Error) {
result := ListObjectsResult{}
// Input validation.
if !IsValidBucketName(bucket) {
return result, probe.NewError(BucketNameInvalid{Bucket: bucket})
}
bucket = fs.denormalizeBucket(bucket)
if status, err := IsDirExist(filepath.Join(fs.path, bucket)); !status {
if err == nil {
return result, probe.NewError(BucketNotFound{Bucket: bucket})
} else if os.IsNotExist(err) {
return result, probe.NewError(BucketNotFound{Bucket: bucket})
} else {
return result, probe.NewError(err)
}
}
if delimiter != "" && delimiter != "/" {
return result, probe.NewError(fmt.Errorf("delimiter '%s' is not supported", delimiter))
}
if marker != "" {
if markerUnescaped, err := url.QueryUnescape(marker); err == nil {
marker = markerUnescaped
} else {
return result, probe.NewError(err)
}
if !strings.HasPrefix(marker, prefix) {
return result, probe.NewError(fmt.Errorf("marker '%s' and prefix '%s' do not match", marker, prefix))
}
}
if maxKeys <= 0 || maxKeys > listObjectsLimit {
maxKeys = listObjectsLimit
}
bucketDir := filepath.Join(fs.path, bucket)
recursive := true
skipDir := true
if delimiter == "/" {
skipDir = false
recursive = false
}
prefixDir := filepath.Dir(filepath.FromSlash(prefix))
rootDir := filepath.Join(bucketDir, prefixDir)
objectInfoCh := fs.popListObjectCh(ListObjectParams{bucket, delimiter, marker, prefix})
if objectInfoCh == nil {
ch := treeWalk(rootDir, bucketDir, recursive)
objectInfoCh = &ch
}
nextMarker := ""
for i := 0; i < maxKeys; {
objInfo, ok := objectInfoCh.Read()
if !ok {
// closed channel
return result, nil
}
if objInfo.Err != nil {
return ListObjectsResult{}, probe.NewError(objInfo.Err)
}
if strings.Contains(objInfo.Name, "$multiparts") || strings.Contains(objInfo.Name, "$tmpobject") {
continue
}
if objInfo.IsDir && skipDir {
continue
}
if strings.HasPrefix(objInfo.Name, prefix) {
if objInfo.Name > marker {
if objInfo.IsDir {
result.Prefixes = append(result.Prefixes, objInfo.Name)
} else {
result.Objects = append(result.Objects, ObjectMetadata{
Bucket: bucket,
Object: objInfo.Name,
LastModified: objInfo.ModifiedTime,
Size: objInfo.Size,
})
}
nextMarker = objInfo.Name
i++
}
}
}
if !objectInfoCh.IsClosed() {
result.IsTruncated = true
result.NextMarker = nextMarker
fs.pushListObjectCh(ListObjectParams{bucket, delimiter, nextMarker, prefix}, *objectInfoCh)
}
return result, nil
}