mirror of https://github.com/minio/minio.git
578 lines
16 KiB
Go
578 lines
16 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 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 main
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import (
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"io"
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"io/ioutil"
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"path"
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"strconv"
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"strings"
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"github.com/minio/minio/pkg/probe"
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"github.com/skyrings/skyring-common/tools/uuid"
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)
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const (
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// Minio meta volume.
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minioMetaVolume = ".minio"
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)
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// checks whether bucket exists.
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func (o objectAPI) isBucketExist(bucketName string) (bool, error) {
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// Check whether bucket exists.
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if _, e := o.storage.StatVol(bucketName); e != nil {
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if e == errVolumeNotFound {
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return false, nil
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}
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return false, e
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}
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return true, nil
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}
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// checkLeafDirectory - verifies if a given path is leaf directory if
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// yes returns all the files inside it.
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func (o objectAPI) checkLeafDirectory(prefixPath string) (isLeaf bool, fis []FileInfo) {
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var allFileInfos []FileInfo
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var markerPath string
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for {
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fileInfos, eof, e := o.storage.ListFiles(minioMetaVolume, prefixPath, markerPath, false, 1000)
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if e != nil {
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break
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}
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allFileInfos = append(allFileInfos, fileInfos...)
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if eof {
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break
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}
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markerPath = allFileInfos[len(allFileInfos)-1].Name
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}
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for _, fileInfo := range allFileInfos {
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if fileInfo.Mode.IsDir() {
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isLeaf = false
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return isLeaf, nil
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}
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fileName := path.Base(fileInfo.Name)
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if !strings.Contains(fileName, ".") {
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fis = append(fis, fileInfo)
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}
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}
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isLeaf = true
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return isLeaf, fis
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}
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// ListMultipartUploads - list multipart uploads.
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func (o objectAPI) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (ListMultipartsInfo, *probe.Error) {
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result := ListMultipartsInfo{}
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return ListMultipartsInfo{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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if !IsValidObjectPrefix(prefix) {
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return ListMultipartsInfo{}, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: prefix})
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}
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// Verify if delimiter is anything other than '/', which we do not support.
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if delimiter != "" && delimiter != slashSeparator {
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return ListMultipartsInfo{}, probe.NewError(UnsupportedDelimiter{
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Delimiter: delimiter,
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})
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}
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// Verify if marker has prefix.
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if keyMarker != "" && !strings.HasPrefix(keyMarker, prefix) {
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return ListMultipartsInfo{}, probe.NewError(InvalidMarkerPrefixCombination{
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Marker: keyMarker,
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Prefix: prefix,
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})
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}
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if uploadIDMarker != "" {
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if strings.HasSuffix(keyMarker, slashSeparator) {
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return result, probe.NewError(InvalidUploadIDKeyCombination{
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UploadIDMarker: uploadIDMarker,
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KeyMarker: keyMarker,
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})
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}
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id, e := uuid.Parse(uploadIDMarker)
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if e != nil {
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return result, probe.NewError(e)
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}
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if id.IsZero() {
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return result, probe.NewError(MalformedUploadID{
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UploadID: uploadIDMarker,
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})
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}
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}
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recursive := true
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if delimiter == slashSeparator {
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recursive = false
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}
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result.IsTruncated = true
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result.MaxUploads = maxUploads
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newMaxUploads := 0
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// Not using path.Join() as it strips off the trailing '/'.
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// Also bucket should always be followed by '/' even if prefix is empty.
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prefixPath := pathJoin(bucket, prefix)
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if recursive {
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keyMarkerPath := ""
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if keyMarker != "" {
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keyMarkerPath = path.Join(bucket, keyMarker, uploadIDMarker)
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}
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outerLoop:
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for {
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fileInfos, eof, e := o.storage.ListFiles(minioMetaVolume, prefixPath, keyMarkerPath, recursive, maxUploads-newMaxUploads)
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if e != nil {
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return ListMultipartsInfo{}, probe.NewError(e)
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}
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for _, fi := range fileInfos {
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keyMarkerPath = fi.Name
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// fi.Name will look like bucket/object/uploadID, extract object and uploadID.
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uploadID := path.Base(fi.Name)
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objectName := strings.TrimPrefix(path.Dir(fi.Name), retainSlash(bucket))
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if strings.Contains(uploadID, ".") {
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// Contains partnumber and md5sum info, skip this.
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continue
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}
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result.Uploads = append(result.Uploads, uploadMetadata{
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Object: objectName,
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UploadID: uploadID,
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Initiated: fi.ModTime,
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})
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result.NextKeyMarker = objectName
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result.NextUploadIDMarker = uploadID
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newMaxUploads++
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if newMaxUploads == maxUploads {
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if eof {
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result.IsTruncated = false
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}
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break outerLoop
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}
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}
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if eof {
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result.IsTruncated = false
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break
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}
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}
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if !result.IsTruncated {
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result.NextKeyMarker = ""
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result.NextUploadIDMarker = ""
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}
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return result, nil
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}
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var fileInfos []FileInfo
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// read all the "fileInfos" in the prefix
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for {
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marker := ""
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fis, eof, e := o.storage.ListFiles(minioMetaVolume, prefixPath, marker, recursive, 1000)
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if e != nil {
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return ListMultipartsInfo{}, probe.NewError(e)
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}
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for _, fi := range fis {
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marker = fi.Name
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if fi.Mode.IsDir() {
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fileInfos = append(fileInfos, fi)
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}
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}
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if eof {
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break
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}
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}
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// Create "uploads" slice from "fileInfos" slice.
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var uploads []uploadMetadata
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for _, fi := range fileInfos {
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leaf, entries := o.checkLeafDirectory(fi.Name)
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objectName := strings.TrimPrefix(fi.Name, retainSlash(bucket))
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if leaf {
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for _, entry := range entries {
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if strings.Contains(path.Base(entry.Name), ".") {
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continue
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}
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uploads = append(uploads, uploadMetadata{
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Object: path.Dir(objectName),
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UploadID: path.Base(entry.Name),
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Initiated: entry.ModTime,
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})
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}
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continue
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}
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uploads = append(uploads, uploadMetadata{
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Object: objectName,
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})
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}
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index := 0
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for i, upload := range uploads {
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index = i
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if upload.Object > keyMarker {
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break
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}
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if uploads[index].Object == keyMarker && upload.UploadID > uploadIDMarker {
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break
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}
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}
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for ; index < len(uploads); index++ {
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if (len(result.Uploads) + len(result.CommonPrefixes)) == maxUploads {
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break
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}
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result.NextKeyMarker = uploads[index].Object
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if strings.HasSuffix(uploads[index].Object, slashSeparator) {
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// for a directory entry
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result.CommonPrefixes = append(result.CommonPrefixes, uploads[index].Object)
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continue
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}
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result.NextUploadIDMarker = uploads[index].UploadID
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result.Uploads = append(result.Uploads, uploads[index])
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}
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if index == len(uploads) {
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result.IsTruncated = false
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result.NextKeyMarker = ""
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result.NextUploadIDMarker = ""
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}
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return result, nil
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}
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func (o objectAPI) NewMultipartUpload(bucket, object string) (string, *probe.Error) {
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// Verify if bucket name is valid.
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if !IsValidBucketName(bucket) {
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return "", probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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// Verify if object name is valid.
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if !IsValidObjectName(object) {
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return "", probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
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}
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// Verify whether the bucket exists.
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isExist, err := o.isBucketExist(bucket)
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if err != nil {
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return "", probe.NewError(err)
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}
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if !isExist {
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return "", probe.NewError(BucketNotFound{Bucket: bucket})
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}
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if _, e := o.storage.StatVol(minioMetaVolume); e != nil {
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if e == errVolumeNotFound {
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e = o.storage.MakeVol(minioMetaVolume)
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if e != nil {
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if e == errDiskFull {
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return "", probe.NewError(StorageFull{})
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}
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return "", probe.NewError(e)
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}
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}
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}
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for {
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uuid, e := uuid.New()
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if e != nil {
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return "", probe.NewError(e)
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}
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uploadID := uuid.String()
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uploadIDPath := path.Join(bucket, object, uploadID)
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if _, e = o.storage.StatFile(minioMetaVolume, uploadIDPath); e != nil {
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if e != errFileNotFound {
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return "", probe.NewError(toObjectErr(e, minioMetaVolume, uploadIDPath))
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}
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// uploadIDPath doesn't exist, so create empty file to reserve the name
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var w io.WriteCloser
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if w, e = o.storage.CreateFile(minioMetaVolume, uploadIDPath); e == nil {
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// Close the writer.
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if e = w.Close(); e != nil {
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return "", probe.NewError(e)
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}
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} else {
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return "", probe.NewError(toObjectErr(e, minioMetaVolume, uploadIDPath))
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}
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return uploadID, nil
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}
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// uploadIDPath already exists.
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// loop again to try with different uuid generated.
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}
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}
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// isUploadIDExists - verify if a given uploadID exists and is valid.
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func (o objectAPI) isUploadIDExists(bucket, object, uploadID string) (bool, error) {
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uploadIDPath := path.Join(bucket, object, uploadID)
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st, e := o.storage.StatFile(minioMetaVolume, uploadIDPath)
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if e != nil {
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// Upload id does not exist.
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if e == errFileNotFound {
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return false, nil
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}
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return false, e
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}
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// Upload id exists and is a regular file.
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return st.Mode.IsRegular(), nil
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}
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// PutObjectPart - writes the multipart upload chunks.
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func (o objectAPI) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string) (string, *probe.Error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return "", probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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if !IsValidObjectName(object) {
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return "", probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
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}
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// Verify whether the bucket exists.
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isExist, err := o.isBucketExist(bucket)
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if err != nil {
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return "", probe.NewError(err)
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}
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if !isExist {
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return "", probe.NewError(BucketNotFound{Bucket: bucket})
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}
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if status, e := o.isUploadIDExists(bucket, object, uploadID); e != nil {
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return "", probe.NewError(e)
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} else if !status {
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return "", probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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partSuffix := fmt.Sprintf("%s.%d.%s", uploadID, partID, md5Hex)
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fileWriter, e := o.storage.CreateFile(minioMetaVolume, path.Join(bucket, object, partSuffix))
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if e != nil {
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return "", probe.NewError(toObjectErr(e, bucket, object))
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}
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// Initialize md5 writer.
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md5Writer := md5.New()
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// Instantiate a new multi writer.
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multiWriter := io.MultiWriter(md5Writer, fileWriter)
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// Instantiate checksum hashers and create a multiwriter.
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if size > 0 {
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if _, e = io.CopyN(multiWriter, data, size); e != nil {
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safeCloseAndRemove(fileWriter)
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return "", probe.NewError(toObjectErr(e))
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}
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// Reader shouldn't have more data what mentioned in size argument.
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// reading one more byte from the reader to validate it.
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// expected to fail, success validates existence of more data in the reader.
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if _, e = io.CopyN(ioutil.Discard, data, 1); e == nil {
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safeCloseAndRemove(fileWriter)
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return "", probe.NewError(UnExpectedDataSize{Size: int(size)})
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}
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} else {
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if _, e = io.Copy(multiWriter, data); e != nil {
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safeCloseAndRemove(fileWriter)
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return "", probe.NewError(toObjectErr(e))
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}
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}
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newMD5Hex := hex.EncodeToString(md5Writer.Sum(nil))
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if md5Hex != "" {
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if newMD5Hex != md5Hex {
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safeCloseAndRemove(fileWriter)
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return "", probe.NewError(BadDigest{md5Hex, newMD5Hex})
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}
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}
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e = fileWriter.Close()
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if e != nil {
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return "", probe.NewError(e)
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}
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return newMD5Hex, nil
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}
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func (o objectAPI) ListObjectParts(bucket, object, uploadID string, partNumberMarker, maxParts int) (ListPartsInfo, *probe.Error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return ListPartsInfo{}, probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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if !IsValidObjectName(object) {
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return ListPartsInfo{}, probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
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}
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if status, e := o.isUploadIDExists(bucket, object, uploadID); e != nil {
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return ListPartsInfo{}, probe.NewError(e)
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} else if !status {
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return ListPartsInfo{}, probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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result := ListPartsInfo{}
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var markerPath string
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nextPartNumberMarker := 0
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uploadIDPath := path.Join(bucket, object, uploadID)
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// Figure out the marker for the next subsequent calls, if the
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// partNumberMarker is already set.
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if partNumberMarker > 0 {
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partNumberMarkerPath := uploadIDPath + "." + strconv.Itoa(partNumberMarker) + "."
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fileInfos, _, e := o.storage.ListFiles(minioMetaVolume, partNumberMarkerPath, "", false, 1)
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if e != nil {
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return result, probe.NewError(toObjectErr(e, minioMetaVolume, partNumberMarkerPath))
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}
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if len(fileInfos) == 0 {
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return result, probe.NewError(InvalidPart{})
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}
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markerPath = fileInfos[0].Name
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}
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uploadIDPrefix := uploadIDPath + "."
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fileInfos, eof, e := o.storage.ListFiles(minioMetaVolume, uploadIDPrefix, markerPath, false, maxParts)
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if e != nil {
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return result, probe.NewError(InvalidPart{})
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}
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for _, fileInfo := range fileInfos {
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fileName := path.Base(fileInfo.Name)
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splitResult := strings.Split(fileName, ".")
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partNum, e := strconv.Atoi(splitResult[1])
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if e != nil {
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return result, probe.NewError(e)
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}
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md5sum := splitResult[2]
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result.Parts = append(result.Parts, partInfo{
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PartNumber: partNum,
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LastModified: fileInfo.ModTime,
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ETag: md5sum,
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Size: fileInfo.Size,
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})
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nextPartNumberMarker = partNum
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}
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result.Bucket = bucket
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result.Object = object
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result.UploadID = uploadID
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result.PartNumberMarker = partNumberMarker
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result.NextPartNumberMarker = nextPartNumberMarker
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result.MaxParts = maxParts
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result.IsTruncated = !eof
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return result, nil
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}
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// Create an s3 compatible MD5sum for complete multipart transaction.
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func makeS3MD5(md5Strs ...string) (string, *probe.Error) {
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var finalMD5Bytes []byte
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for _, md5Str := range md5Strs {
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md5Bytes, e := hex.DecodeString(md5Str)
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if e != nil {
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return "", probe.NewError(e)
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}
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finalMD5Bytes = append(finalMD5Bytes, md5Bytes...)
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}
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md5Hasher := md5.New()
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md5Hasher.Write(finalMD5Bytes)
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s3MD5 := fmt.Sprintf("%s-%d", hex.EncodeToString(md5Hasher.Sum(nil)), len(md5Strs))
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return s3MD5, nil
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}
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func (o objectAPI) CompleteMultipartUpload(bucket string, object string, uploadID string, parts []completePart) (string, *probe.Error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return "", probe.NewError(BucketNameInvalid{Bucket: bucket})
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}
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if !IsValidObjectName(object) {
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return "", probe.NewError(ObjectNameInvalid{
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Bucket: bucket,
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Object: object,
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})
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}
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if status, e := o.isUploadIDExists(bucket, object, uploadID); e != nil {
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return "", probe.NewError(e)
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} else if !status {
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return "", probe.NewError(InvalidUploadID{UploadID: uploadID})
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}
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fileWriter, e := o.storage.CreateFile(bucket, object)
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if e != nil {
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return "", probe.NewError(toObjectErr(e, bucket, object))
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}
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var md5Sums []string
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for _, part := range parts {
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// Construct part suffix.
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partSuffix := fmt.Sprintf("%s.%d.%s", uploadID, part.PartNumber, part.ETag)
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var fileReader io.ReadCloser
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fileReader, e = o.storage.ReadFile(minioMetaVolume, path.Join(bucket, object, partSuffix), 0)
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if e != nil {
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if e == errFileNotFound {
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return "", probe.NewError(InvalidPart{})
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}
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return "", probe.NewError(e)
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}
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_, e = io.Copy(fileWriter, fileReader)
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if e != nil {
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return "", probe.NewError(e)
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}
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e = fileReader.Close()
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if e != nil {
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return "", probe.NewError(e)
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}
|
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md5Sums = append(md5Sums, part.ETag)
|
|
}
|
|
|
|
e = fileWriter.Close()
|
|
if e != nil {
|
|
return "", probe.NewError(e)
|
|
}
|
|
|
|
// Save the s3 md5.
|
|
s3MD5, err := makeS3MD5(md5Sums...)
|
|
if err != nil {
|
|
return "", err.Trace(md5Sums...)
|
|
}
|
|
|
|
// Cleanup all the parts.
|
|
o.removeMultipartUpload(bucket, object, uploadID)
|
|
|
|
// Return md5sum.
|
|
return s3MD5, nil
|
|
}
|
|
|
|
func (o objectAPI) removeMultipartUpload(bucket, object, uploadID string) *probe.Error {
|
|
// Verify if bucket is valid.
|
|
if !IsValidBucketName(bucket) {
|
|
return probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidObjectName(object) {
|
|
return probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
|
|
}
|
|
|
|
marker := ""
|
|
for {
|
|
uploadIDPath := path.Join(bucket, object, uploadID)
|
|
fileInfos, eof, e := o.storage.ListFiles(minioMetaVolume, uploadIDPath, marker, false, 1000)
|
|
if e != nil {
|
|
|
|
return probe.NewError(InvalidUploadID{UploadID: uploadID})
|
|
}
|
|
for _, fileInfo := range fileInfos {
|
|
o.storage.DeleteFile(minioMetaVolume, fileInfo.Name)
|
|
marker = fileInfo.Name
|
|
}
|
|
if eof {
|
|
break
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (o objectAPI) AbortMultipartUpload(bucket, object, uploadID string) *probe.Error {
|
|
// Verify if bucket is valid.
|
|
if !IsValidBucketName(bucket) {
|
|
return probe.NewError(BucketNameInvalid{Bucket: bucket})
|
|
}
|
|
if !IsValidObjectName(object) {
|
|
return probe.NewError(ObjectNameInvalid{Bucket: bucket, Object: object})
|
|
}
|
|
if status, e := o.isUploadIDExists(bucket, object, uploadID); e != nil {
|
|
return probe.NewError(e)
|
|
} else if !status {
|
|
return probe.NewError(InvalidUploadID{UploadID: uploadID})
|
|
}
|
|
err := o.removeMultipartUpload(bucket, object, uploadID)
|
|
if err != nil {
|
|
return err.Trace(bucket, object, uploadID)
|
|
}
|
|
return nil
|
|
}
|