2016-04-29 23:24:10 +02:00
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/*
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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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2016-05-13 20:52:36 +02:00
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"crypto/md5"
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"encoding/hex"
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2016-04-29 23:24:10 +02:00
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"io"
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"path/filepath"
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"strings"
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2016-05-05 21:51:56 +02:00
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"sync"
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2016-04-29 23:24:10 +02:00
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"github.com/minio/minio/pkg/mimedb"
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)
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// fsObjects - Implements fs object layer.
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type fsObjects struct {
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storage StorageAPI
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listObjectMap map[listParams][]*treeWalker
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listObjectMapMutex *sync.Mutex
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}
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// newFSObjects - initialize new fs object layer.
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func newFSObjects(exportPath string) (ObjectLayer, error) {
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var storage StorageAPI
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var err error
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if !strings.ContainsRune(exportPath, ':') || filepath.VolumeName(exportPath) != "" {
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// Initialize filesystem storage API.
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storage, err = newPosix(exportPath)
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if err != nil {
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return nil, err
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}
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} else {
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// Initialize rpc client storage API.
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storage, err = newRPCClient(exportPath)
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if err != nil {
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return nil, err
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}
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}
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2016-05-05 10:54:43 +02:00
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2016-05-06 00:00:03 +02:00
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// Initialize object layer - like creating minioMetaBucket,
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// cleaning up tmp files etc.
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initObjectLayer(storage)
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// Return successfully initialized object layer.
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return fsObjects{
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storage: storage,
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listObjectMap: make(map[listParams][]*treeWalker),
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listObjectMapMutex: &sync.Mutex{},
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}, nil
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}
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/// Bucket operations
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// MakeBucket - make a bucket.
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func (fs fsObjects) MakeBucket(bucket string) error {
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return makeBucket(fs.storage, bucket)
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}
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// GetBucketInfo - get bucket info.
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func (fs fsObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
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return getBucketInfo(fs.storage, bucket)
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}
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// ListBuckets - list buckets.
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func (fs fsObjects) ListBuckets() ([]BucketInfo, error) {
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return listBuckets(fs.storage)
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}
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// DeleteBucket - delete a bucket.
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func (fs fsObjects) DeleteBucket(bucket string) error {
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return deleteBucket(fs.storage, bucket)
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}
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/// Object Operations
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// GetObject - get an object.
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func (fs fsObjects) GetObject(bucket, object string, startOffset int64) (io.ReadCloser, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return nil, BucketNameInvalid{Bucket: bucket}
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}
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// Verify if object is valid.
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if !IsValidObjectName(object) {
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return nil, ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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fileReader, err := fs.storage.ReadFile(bucket, object, startOffset)
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if err != nil {
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return nil, toObjectErr(err, bucket, object)
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}
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return fileReader, nil
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}
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// GetObjectInfo - get object info.
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func (fs fsObjects) GetObjectInfo(bucket, object string) (ObjectInfo, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return ObjectInfo{}, (BucketNameInvalid{Bucket: bucket})
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}
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// Verify if object is valid.
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if !IsValidObjectName(object) {
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return ObjectInfo{}, (ObjectNameInvalid{Bucket: bucket, Object: object})
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}
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fi, err := fs.storage.StatFile(bucket, object)
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if err != nil {
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return ObjectInfo{}, toObjectErr(err, bucket, object)
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}
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contentType := "application/octet-stream"
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if objectExt := filepath.Ext(object); objectExt != "" {
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content, ok := mimedb.DB[strings.ToLower(strings.TrimPrefix(objectExt, "."))]
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if ok {
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contentType = content.ContentType
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}
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}
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return ObjectInfo{
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Bucket: bucket,
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Name: object,
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ModTime: fi.ModTime,
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Size: fi.Size,
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IsDir: fi.Mode.IsDir(),
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ContentType: contentType,
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MD5Sum: "", // Read from metadata.
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}, nil
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}
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2016-05-03 01:57:31 +02:00
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// PutObject - create an object.
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func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string) (string, error) {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return "", BucketNameInvalid{Bucket: bucket}
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}
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if !IsValidObjectName(object) {
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return "", 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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fileWriter, err := fs.storage.CreateFile(bucket, object)
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if err != nil {
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return "", toObjectErr(err, 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 _, err = io.CopyN(multiWriter, data, size); err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", clErr
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}
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return "", toObjectErr(err, bucket, object)
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}
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} else {
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if _, err = io.Copy(multiWriter, data); err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", clErr
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}
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return "", toObjectErr(err, bucket, object)
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}
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}
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newMD5Hex := hex.EncodeToString(md5Writer.Sum(nil))
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// md5Hex representation.
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var md5Hex string
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if len(metadata) != 0 {
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md5Hex = metadata["md5Sum"]
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}
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if md5Hex != "" {
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if newMD5Hex != md5Hex {
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if err = safeCloseAndRemove(fileWriter); err != nil {
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return "", err
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}
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return "", BadDigest{md5Hex, newMD5Hex}
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}
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}
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err = fileWriter.Close()
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if err != nil {
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if clErr := safeCloseAndRemove(fileWriter); clErr != nil {
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return "", clErr
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}
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return "", err
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}
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// Return md5sum, successfully wrote object.
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return newMD5Hex, nil
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}
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func (fs fsObjects) DeleteObject(bucket, object string) error {
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// Verify if bucket is valid.
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if !IsValidBucketName(bucket) {
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return BucketNameInvalid{Bucket: bucket}
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}
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if !IsValidObjectName(object) {
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return ObjectNameInvalid{Bucket: bucket, Object: object}
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}
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if err := fs.storage.DeleteFile(bucket, object); err != nil {
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return toObjectErr(err, bucket, object)
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}
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return nil
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}
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2016-05-08 10:58:05 +02:00
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// ListObjects - list all objects.
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func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error) {
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return listObjectsCommon(fs, bucket, prefix, marker, delimiter, maxKeys)
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}
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