363 lines
12 KiB
Go
363 lines
12 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package fs
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"sort"
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"strings"
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"github.com/minio/minio-xl/pkg/probe"
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)
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// ListObjects - GET bucket (list objects)
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func (fs Filesystem) ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
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fs.lock.Lock()
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defer fs.lock.Unlock()
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if !IsValidBucket(bucket) {
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return nil, resources, probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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if resources.Prefix != "" && IsValidObjectName(resources.Prefix) == false {
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return nil, resources, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: resources.Prefix})
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}
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p := bucketDir{}
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rootPrefix := filepath.Join(fs.path, bucket)
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// check bucket exists
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if _, err := os.Stat(rootPrefix); os.IsNotExist(err) {
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return nil, resources, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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p.root = rootPrefix
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/// automatically treat incoming "/" as "\\" on windows due to its path constraints.
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if runtime.GOOS == "windows" {
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if resources.Prefix != "" {
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resources.Prefix = strings.Replace(resources.Prefix, "/", string(os.PathSeparator), -1)
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}
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if resources.Delimiter != "" {
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resources.Delimiter = strings.Replace(resources.Delimiter, "/", string(os.PathSeparator), -1)
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}
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if resources.Marker != "" {
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resources.Marker = strings.Replace(resources.Marker, "/", string(os.PathSeparator), -1)
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}
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}
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// if delimiter is supplied and not prefix then we are the very top level, list everything and move on.
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if resources.Delimiter != "" && resources.Prefix == "" {
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files, err := ioutil.ReadDir(rootPrefix)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, resources, probe.NewError(BucketNotFound{Bucket: bucket})
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}
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return nil, resources, probe.NewError(err)
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}
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for _, fl := range files {
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p.files = append(p.files, contentInfo{
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Prefix: fl.Name(),
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Size: fl.Size(),
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Mode: fl.Mode(),
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ModTime: fl.ModTime(),
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FileInfo: fl,
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})
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}
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}
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// If delimiter and prefix is supplied make sure that paging doesn't go deep, treat it as simple directory listing.
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if resources.Delimiter != "" && resources.Prefix != "" {
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if !strings.HasSuffix(resources.Prefix, resources.Delimiter) {
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fl, err := os.Stat(filepath.Join(rootPrefix, resources.Prefix))
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if err != nil {
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if os.IsNotExist(err) {
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return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
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}
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return nil, resources, probe.NewError(err)
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}
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p.files = append(p.files, contentInfo{
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Prefix: resources.Prefix,
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Size: fl.Size(),
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Mode: os.ModeDir,
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ModTime: fl.ModTime(),
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FileInfo: fl,
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})
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} else {
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files, err := ioutil.ReadDir(filepath.Join(rootPrefix, resources.Prefix))
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if err != nil {
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if os.IsNotExist(err) {
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return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
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}
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return nil, resources, probe.NewError(err)
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}
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for _, fl := range files {
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prefix := fl.Name()
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if resources.Prefix != "" {
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prefix = filepath.Join(resources.Prefix, fl.Name())
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}
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p.files = append(p.files, contentInfo{
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Prefix: prefix,
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Size: fl.Size(),
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Mode: fl.Mode(),
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ModTime: fl.ModTime(),
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FileInfo: fl,
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})
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}
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}
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}
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if resources.Delimiter == "" {
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var files []contentInfo
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getAllFiles := func(fp string, fl os.FileInfo, err error) error {
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// If any error return back quickly
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if err != nil {
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return err
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}
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if strings.HasSuffix(fp, "$multiparts") {
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return nil
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}
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// if file pointer equals to rootPrefix - discard it
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if fp == p.root {
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return nil
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}
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if len(files) > resources.Maxkeys {
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return ErrSkipFile
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}
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// Split the root prefix from the incoming file pointer
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realFp := ""
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if runtime.GOOS == "windows" {
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if splits := strings.Split(fp, (p.root + string(os.PathSeparator))); len(splits) > 1 {
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realFp = splits[1]
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}
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} else {
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if splits := strings.Split(fp, (p.root + string(os.PathSeparator))); len(splits) > 1 {
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realFp = splits[1]
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}
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}
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// If path is a directory and has a prefix verify if the file pointer
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// has the prefix if it does not skip the directory.
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if fl.Mode().IsDir() {
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if resources.Prefix != "" {
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// Skip the directory on following situations
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// - when prefix is part of file pointer along with the root path
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// - when file pointer is part of the prefix along with root path
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if !strings.HasPrefix(fp, filepath.Join(p.root, resources.Prefix)) &&
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!strings.HasPrefix(filepath.Join(p.root, resources.Prefix), fp) {
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return ErrSkipDir
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}
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}
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}
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// If path is a directory and has a marker verify if the file split file pointer
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// is lesser than the Marker top level directory if yes skip it.
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if fl.Mode().IsDir() {
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if resources.Marker != "" {
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if realFp != "" {
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// For windows split with its own os.PathSeparator
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if runtime.GOOS == "windows" {
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if realFp < strings.Split(resources.Marker, string(os.PathSeparator))[0] {
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return ErrSkipDir
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}
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} else {
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if realFp < strings.Split(resources.Marker, string(os.PathSeparator))[0] {
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return ErrSkipDir
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}
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}
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}
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}
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}
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// If regular file verify
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if fl.Mode().IsRegular() {
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// If marker is present this will be used to check if filepointer is
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// lexically higher than then Marker
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if realFp != "" {
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if resources.Marker != "" {
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if realFp > resources.Marker {
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files = append(files, contentInfo{
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Prefix: realFp,
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Size: fl.Size(),
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Mode: fl.Mode(),
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ModTime: fl.ModTime(),
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FileInfo: fl,
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})
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}
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} else {
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files = append(files, contentInfo{
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Prefix: realFp,
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Size: fl.Size(),
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Mode: fl.Mode(),
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ModTime: fl.ModTime(),
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FileInfo: fl,
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})
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}
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}
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}
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// If file is a symlink follow it and populate values.
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if fl.Mode()&os.ModeSymlink == os.ModeSymlink {
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st, err := os.Stat(fp)
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if err != nil {
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return nil
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}
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// If marker is present this will be used to check if filepointer is
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// lexically higher than then Marker
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if realFp != "" {
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if resources.Marker != "" {
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if realFp > resources.Marker {
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files = append(files, contentInfo{
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Prefix: realFp,
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Size: st.Size(),
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Mode: st.Mode(),
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ModTime: st.ModTime(),
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FileInfo: st,
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})
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}
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} else {
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files = append(files, contentInfo{
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Prefix: realFp,
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Size: st.Size(),
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Mode: st.Mode(),
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ModTime: st.ModTime(),
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FileInfo: st,
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})
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}
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}
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}
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p.files = files
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return nil
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}
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// If no delimiter is specified, crawl through everything.
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err := Walk(rootPrefix, getAllFiles)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, resources, probe.NewError(ObjectNotFound{Bucket: bucket, Object: resources.Prefix})
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}
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return nil, resources, probe.NewError(err)
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}
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}
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var metadataList []ObjectMetadata
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var metadata ObjectMetadata
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// Filter objects
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for _, content := range p.files {
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if len(metadataList) == resources.Maxkeys {
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resources.IsTruncated = true
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if resources.IsTruncated && resources.Delimiter != "" {
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resources.NextMarker = metadataList[len(metadataList)-1].Object
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}
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break
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}
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if content.Prefix > resources.Marker {
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var err *probe.Error
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metadata, resources, err = fs.filterObjects(bucket, content, resources)
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if err != nil {
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return nil, resources, err.Trace()
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}
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// If windows replace all the incoming paths to API compatible paths
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if runtime.GOOS == "windows" {
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metadata.Object = sanitizeWindowsPath(metadata.Object)
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}
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if metadata.Bucket != "" {
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metadataList = append(metadataList, metadata)
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}
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}
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}
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// Sanitize common prefixes back into API compatible paths
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if runtime.GOOS == "windows" {
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resources.CommonPrefixes = sanitizeWindowsPaths(resources.CommonPrefixes...)
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}
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return metadataList, resources, nil
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}
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func (fs Filesystem) filterObjects(bucket string, content contentInfo, resources BucketResourcesMetadata) (ObjectMetadata, BucketResourcesMetadata, *probe.Error) {
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var err *probe.Error
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var metadata ObjectMetadata
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name := content.Prefix
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switch true {
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// Both delimiter and Prefix is present
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case resources.Delimiter != "" && resources.Prefix != "":
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if strings.HasPrefix(name, resources.Prefix) {
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trimmedName := strings.TrimPrefix(name, resources.Prefix)
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delimitedName := delimiter(trimmedName, resources.Delimiter)
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switch true {
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case name == resources.Prefix:
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// Use resources.Prefix to filter out delimited file
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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if metadata.Mode.IsDir() {
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resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
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return ObjectMetadata{}, resources, nil
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}
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case delimitedName == content.FileInfo.Name():
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// Use resources.Prefix to filter out delimited files
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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if metadata.Mode.IsDir() {
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resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
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return ObjectMetadata{}, resources, nil
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}
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case delimitedName != "":
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resources.CommonPrefixes = append(resources.CommonPrefixes, resources.Prefix+delimitedName)
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}
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}
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// Delimiter present and Prefix is absent
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case resources.Delimiter != "" && resources.Prefix == "":
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delimitedName := delimiter(name, resources.Delimiter)
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switch true {
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case delimitedName == "":
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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if metadata.Mode.IsDir() {
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resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
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return ObjectMetadata{}, resources, nil
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}
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case delimitedName == content.FileInfo.Name():
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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if metadata.Mode.IsDir() {
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resources.CommonPrefixes = append(resources.CommonPrefixes, name+resources.Delimiter)
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return ObjectMetadata{}, resources, nil
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}
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case delimitedName != "":
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resources.CommonPrefixes = append(resources.CommonPrefixes, delimitedName)
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}
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// Delimiter is absent and only Prefix is present
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case resources.Delimiter == "" && resources.Prefix != "":
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if strings.HasPrefix(name, resources.Prefix) {
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// Do not strip prefix object output
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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}
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default:
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metadata, err = getMetadata(fs.path, bucket, name)
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if err != nil {
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return ObjectMetadata{}, resources, err.Trace()
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}
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}
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sortUnique(sort.StringSlice(resources.CommonPrefixes))
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return metadata, resources, nil
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}
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