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430 lines
14 KiB
430 lines
14 KiB
/*
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* Minimalist Object 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 donut
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import (
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"bytes"
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"crypto/md5"
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"crypto/sha512"
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"encoding/base64"
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"encoding/hex"
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"errors"
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"io"
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"math/rand"
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"runtime/debug"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/minio/minio/pkg/iodine"
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"github.com/minio/minio/pkg/storage/drivers"
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)
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// isMD5SumEqual - returns error if md5sum mismatches, success its `nil`
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func isMD5SumEqual(expectedMD5Sum, actualMD5Sum string) error {
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if strings.TrimSpace(expectedMD5Sum) != "" && strings.TrimSpace(actualMD5Sum) != "" {
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expectedMD5SumBytes, err := hex.DecodeString(expectedMD5Sum)
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if err != nil {
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return iodine.New(err, nil)
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}
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actualMD5SumBytes, err := hex.DecodeString(actualMD5Sum)
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if err != nil {
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return iodine.New(err, nil)
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}
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if !bytes.Equal(expectedMD5SumBytes, actualMD5SumBytes) {
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return iodine.New(errors.New("bad digest, md5sum mismatch"), nil)
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}
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return nil
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}
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return iodine.New(errors.New("invalid argument"), nil)
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}
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func (d donutDriver) NewMultipartUpload(bucketName, objectName, contentType string) (string, error) {
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d.lock.RLock()
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if !drivers.IsValidBucket(bucketName) {
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d.lock.RUnlock()
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return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !drivers.IsValidObjectName(objectName) {
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d.lock.RUnlock()
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return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
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}
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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d.lock.RUnlock()
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return "", iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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objectKey := bucketName + "/" + objectName
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if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
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d.lock.RUnlock()
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return "", iodine.New(drivers.ObjectExists{Bucket: bucketName, Object: objectName}, nil)
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}
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d.lock.RUnlock()
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d.lock.Lock()
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id := []byte(strconv.FormatInt(rand.Int63(), 10) + bucketName + objectName + time.Now().String())
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uploadIDSum := sha512.Sum512(id)
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uploadID := base64.URLEncoding.EncodeToString(uploadIDSum[:])[:47]
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d.storedBuckets[bucketName].multiPartSession[objectName] = multiPartSession{
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uploadID: uploadID,
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initiated: time.Now().UTC(),
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totalParts: 0,
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}
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d.lock.Unlock()
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return uploadID, nil
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}
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func (d donutDriver) AbortMultipartUpload(bucketName, objectName, uploadID string) error {
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d.lock.RLock()
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storedBucket := d.storedBuckets[bucketName]
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if storedBucket.multiPartSession[objectName].uploadID != uploadID {
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d.lock.RUnlock()
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return iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
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}
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d.lock.RUnlock()
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d.cleanupMultiparts(bucketName, objectName, uploadID)
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d.cleanupMultipartSession(bucketName, objectName, uploadID)
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return nil
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}
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func getMultipartKey(key string, uploadID string, partNumber int) string {
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return key + "?uploadId=" + uploadID + "&partNumber=" + strconv.Itoa(partNumber)
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}
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func (d donutDriver) CreateObjectPart(bucketName, objectName, uploadID string, partID int, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
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// Verify upload id
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d.lock.RLock()
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storedBucket := d.storedBuckets[bucketName]
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if storedBucket.multiPartSession[objectName].uploadID != uploadID {
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d.lock.RUnlock()
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return "", iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
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}
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d.lock.RUnlock()
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etag, err := d.createObjectPart(bucketName, objectName, uploadID, partID, "", expectedMD5Sum, size, data)
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if err != nil {
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return "", iodine.New(err, nil)
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}
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// free
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debug.FreeOSMemory()
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return etag, nil
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}
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// createObject - PUT object to memory buffer
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func (d donutDriver) createObjectPart(bucketName, objectName, uploadID string, partID int, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
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d.lock.RLock()
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if !drivers.IsValidBucket(bucketName) {
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d.lock.RUnlock()
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return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !drivers.IsValidObjectName(objectName) {
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d.lock.RUnlock()
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return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
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}
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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d.lock.RUnlock()
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return "", iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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// get object key
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partKey := bucketName + "/" + getMultipartKey(objectName, uploadID, partID)
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if _, ok := storedBucket.partMetadata[partKey]; ok == true {
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d.lock.RUnlock()
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return storedBucket.partMetadata[partKey].ETag, nil
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}
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d.lock.RUnlock()
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if contentType == "" {
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contentType = "application/octet-stream"
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}
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contentType = strings.TrimSpace(contentType)
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if strings.TrimSpace(expectedMD5Sum) != "" {
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expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
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if err != nil {
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// pro-actively close the connection
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return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
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}
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expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
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}
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// calculate md5
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hash := md5.New()
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var readBytes []byte
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var err error
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var length int
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for err == nil {
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byteBuffer := make([]byte, 1024*1024)
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length, err = data.Read(byteBuffer)
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// While hash.Write() wouldn't mind a Nil byteBuffer
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// It is necessary for us to verify this and break
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if length == 0 {
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break
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}
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hash.Write(byteBuffer[0:length])
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readBytes = append(readBytes, byteBuffer[0:length]...)
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}
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if err != io.EOF {
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return "", iodine.New(err, nil)
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}
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go debug.FreeOSMemory()
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md5SumBytes := hash.Sum(nil)
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totalLength := int64(len(readBytes))
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d.lock.Lock()
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d.multiPartObjects.Set(partKey, readBytes)
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d.lock.Unlock()
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// setting up for de-allocation
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readBytes = nil
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go debug.FreeOSMemory()
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md5Sum := hex.EncodeToString(md5SumBytes)
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// Verify if the written object is equal to what is expected, only if it is requested as such
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if strings.TrimSpace(expectedMD5Sum) != "" {
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if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
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return "", iodine.New(drivers.BadDigest{
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Md5: expectedMD5Sum,
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Bucket: bucketName,
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Key: objectName,
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}, nil)
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}
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}
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newPart := drivers.PartMetadata{
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PartNumber: partID,
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LastModified: time.Now().UTC(),
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ETag: md5Sum,
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Size: totalLength,
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}
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d.lock.Lock()
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storedBucket.partMetadata[partKey] = newPart
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multiPartSession := storedBucket.multiPartSession[objectName]
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multiPartSession.totalParts++
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storedBucket.multiPartSession[objectName] = multiPartSession
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d.storedBuckets[bucketName] = storedBucket
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d.lock.Unlock()
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return md5Sum, nil
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}
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func (d donutDriver) cleanupMultipartSession(bucketName, objectName, uploadID string) {
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d.lock.Lock()
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defer d.lock.Unlock()
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delete(d.storedBuckets[bucketName].multiPartSession, objectName)
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}
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func (d donutDriver) cleanupMultiparts(bucketName, objectName, uploadID string) {
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for i := 1; i <= d.storedBuckets[bucketName].multiPartSession[objectName].totalParts; i++ {
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objectKey := bucketName + "/" + getMultipartKey(objectName, uploadID, i)
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d.multiPartObjects.Delete(objectKey)
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}
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}
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func (d donutDriver) CompleteMultipartUpload(bucketName, objectName, uploadID string, parts map[int]string) (string, error) {
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if !drivers.IsValidBucket(bucketName) {
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return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
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}
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if !drivers.IsValidObjectName(objectName) {
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return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
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}
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// Verify upload id
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d.lock.RLock()
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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d.lock.RUnlock()
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return "", iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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if storedBucket.multiPartSession[objectName].uploadID != uploadID {
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d.lock.RUnlock()
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return "", iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
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}
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d.lock.RUnlock()
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d.lock.Lock()
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var size int64
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fullHasher := md5.New()
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var fullObject bytes.Buffer
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for i := 1; i <= len(parts); i++ {
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recvMD5 := parts[i]
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object, ok := d.multiPartObjects.Get(bucketName + "/" + getMultipartKey(objectName, uploadID, i))
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if ok == false {
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d.lock.Unlock()
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return "", iodine.New(errors.New("missing part: "+strconv.Itoa(i)), nil)
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}
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size += int64(len(object))
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calcMD5Bytes := md5.Sum(object)
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// complete multi part request header md5sum per part is hex encoded
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recvMD5Bytes, err := hex.DecodeString(strings.Trim(recvMD5, "\""))
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if err != nil {
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return "", iodine.New(drivers.InvalidDigest{Md5: recvMD5}, nil)
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}
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if !bytes.Equal(recvMD5Bytes, calcMD5Bytes[:]) {
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return "", iodine.New(drivers.BadDigest{
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Md5: recvMD5,
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Bucket: bucketName,
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Key: getMultipartKey(objectName, uploadID, i),
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}, nil)
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}
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mw := io.MultiWriter(&fullObject, fullHasher)
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_, err = io.Copy(mw, bytes.NewReader(object))
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if err != nil {
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return "", iodine.New(err, nil)
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}
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object = nil
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go debug.FreeOSMemory()
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}
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d.lock.Unlock()
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md5sumSlice := fullHasher.Sum(nil)
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// this is needed for final verification inside CreateObject, do not convert this to hex
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md5sum := base64.StdEncoding.EncodeToString(md5sumSlice)
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etag, err := d.CreateObject(bucketName, objectName, "", md5sum, size, &fullObject)
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if err != nil {
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// No need to call internal cleanup functions here, caller will call AbortMultipartUpload()
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// which would in-turn cleanup properly in accordance with S3 Spec
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return "", iodine.New(err, nil)
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}
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fullObject.Reset()
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go debug.FreeOSMemory()
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d.cleanupMultiparts(bucketName, objectName, uploadID)
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d.cleanupMultipartSession(bucketName, objectName, uploadID)
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return etag, nil
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}
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// byKey is a sortable interface for UploadMetadata slice
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type byKey []*drivers.UploadMetadata
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func (a byKey) Len() int { return len(a) }
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func (a byKey) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a byKey) Less(i, j int) bool { return a[i].Key < a[j].Key }
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func (d donutDriver) ListMultipartUploads(bucketName string, resources drivers.BucketMultipartResourcesMetadata) (drivers.BucketMultipartResourcesMetadata, error) {
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d.lock.RLock()
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defer d.lock.RUnlock()
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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return drivers.BucketMultipartResourcesMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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var uploads []*drivers.UploadMetadata
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for key, session := range storedBucket.multiPartSession {
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if strings.HasPrefix(key, resources.Prefix) {
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if len(uploads) > resources.MaxUploads {
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sort.Sort(byKey(uploads))
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resources.Upload = uploads
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resources.NextKeyMarker = key
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resources.NextUploadIDMarker = session.uploadID
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resources.IsTruncated = true
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return resources, nil
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}
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// uploadIDMarker is ignored if KeyMarker is empty
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switch {
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case resources.KeyMarker != "" && resources.UploadIDMarker == "":
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if key > resources.KeyMarker {
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upload := new(drivers.UploadMetadata)
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upload.Key = key
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upload.UploadID = session.uploadID
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upload.Initiated = session.initiated
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uploads = append(uploads, upload)
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}
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case resources.KeyMarker != "" && resources.UploadIDMarker != "":
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if session.uploadID > resources.UploadIDMarker {
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if key >= resources.KeyMarker {
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upload := new(drivers.UploadMetadata)
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upload.Key = key
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upload.UploadID = session.uploadID
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upload.Initiated = session.initiated
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uploads = append(uploads, upload)
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}
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}
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default:
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upload := new(drivers.UploadMetadata)
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upload.Key = key
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upload.UploadID = session.uploadID
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upload.Initiated = session.initiated
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uploads = append(uploads, upload)
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}
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}
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}
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sort.Sort(byKey(uploads))
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resources.Upload = uploads
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return resources, nil
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}
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// partNumber is a sortable interface for Part slice
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type partNumber []*drivers.PartMetadata
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func (a partNumber) Len() int { return len(a) }
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func (a partNumber) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a partNumber) Less(i, j int) bool { return a[i].PartNumber < a[j].PartNumber }
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func (d donutDriver) ListObjectParts(bucketName, objectName string, resources drivers.ObjectResourcesMetadata) (drivers.ObjectResourcesMetadata, error) {
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// Verify upload id
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d.lock.RLock()
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defer d.lock.RUnlock()
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if _, ok := d.storedBuckets[bucketName]; ok == false {
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return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
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}
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storedBucket := d.storedBuckets[bucketName]
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if _, ok := storedBucket.multiPartSession[objectName]; ok == false {
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return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.ObjectNotFound{Bucket: bucketName, Object: objectName}, nil)
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}
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if storedBucket.multiPartSession[objectName].uploadID != resources.UploadID {
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return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.InvalidUploadID{UploadID: resources.UploadID}, nil)
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}
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objectResourcesMetadata := resources
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objectResourcesMetadata.Bucket = bucketName
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objectResourcesMetadata.Key = objectName
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var parts []*drivers.PartMetadata
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var startPartNumber int
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switch {
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case objectResourcesMetadata.PartNumberMarker == 0:
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startPartNumber = 1
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default:
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startPartNumber = objectResourcesMetadata.PartNumberMarker
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}
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for i := startPartNumber; i <= storedBucket.multiPartSession[objectName].totalParts; i++ {
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if len(parts) > objectResourcesMetadata.MaxParts {
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sort.Sort(partNumber(parts))
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objectResourcesMetadata.IsTruncated = true
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objectResourcesMetadata.Part = parts
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objectResourcesMetadata.NextPartNumberMarker = i
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return objectResourcesMetadata, nil
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}
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part, ok := storedBucket.partMetadata[bucketName+"/"+getMultipartKey(objectName, resources.UploadID, i)]
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if !ok {
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return drivers.ObjectResourcesMetadata{}, iodine.New(errors.New("missing part: "+strconv.Itoa(i)), nil)
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}
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parts = append(parts, &part)
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}
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sort.Sort(partNumber(parts))
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objectResourcesMetadata.Part = parts
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return objectResourcesMetadata, nil
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}
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func (d donutDriver) expiredPart(a ...interface{}) {
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key := a[0].(string)
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// loop through all buckets
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for _, storedBucket := range d.storedBuckets {
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delete(storedBucket.partMetadata, key)
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}
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go debug.FreeOSMemory()
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}
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