// CreateObject creates a new object
func (d donutDriver) CreateObject(bucketName, objectName, contentType, expectedMD5Sum string, size int64, reader io.Reader) (string, error) {
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
"contentType": contentType,
}
if d.donut == nil {
return "", iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
}
if strings.TrimSpace(contentType) == "" {
contentType = "application/octet-stream"
}
metadata := make(map[string]string)
metadata["contentType"] = strings.TrimSpace(contentType)
metadata["contentLength"] = strconv.FormatInt(size, 10)
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
return "", iodine.New(err, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
calculatedMD5Sum, err := d.donut.PutObject(bucketName, objectName, expectedMD5Sum, ioutil.NopCloser(reader), metadata)
if err != nil {
return "", iodine.New(err, errParams)
}
return calculatedMD5Sum, nil
}
// GetObjectMetadata retrieves an object's metadata
func (d donutDriver) GetObjectMetadata(bucketName, objectName string) (drivers.ObjectMetadata, error) {
d.lock.RLock()
defer d.lock.RUnlock()
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
}
if d.donut == nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
}
if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
}
metadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, errParams)
}
objectMetadata := drivers.ObjectMetadata{
Bucket: bucketName,
Key: objectName,
ContentType: metadata.Metadata["contentType"],
Created: metadata.Created,
Md5: metadata.MD5Sum,
Size: metadata.Size,
}
return objectMetadata, nil
}
// GetPartialObject - GET object from cache buffer range
func (cache *cacheDriver) GetPartialObject(w io.Writer, bucket, object string, start, length int64) (int64, error) {
errParams := map[string]string{
"bucket": bucket,
"object": object,
"start": strconv.FormatInt(start, 10),
"length": strconv.FormatInt(length, 10),
}
cache.lock.RLock()
if !drivers.IsValidBucket(bucket) {
cache.lock.RUnlock()
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, errParams)
}
if !drivers.IsValidObjectName(object) {
cache.lock.RUnlock()
return 0, iodine.New(drivers.ObjectNameInvalid{Object: object}, errParams)
}
if start < 0 {
return 0, iodine.New(drivers.InvalidRange{
Start: start,
Length: length,
}, errParams)
}
objectKey := bucket + "/" + object
data, ok := cache.objects.Get(objectKey)
if !ok {
cache.lock.RUnlock()
return 0, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, errParams)
}
written, err := io.CopyN(w, bytes.NewBuffer(data[start:]), length)
cache.lock.RUnlock()
return written, iodine.New(err, nil)
}
// GetObjectMetadata - HEAD object
func (fs *fsDriver) GetObjectMetadata(bucket, object string) (drivers.ObjectMetadata, error) {
if drivers.IsValidBucket(bucket) == false {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if drivers.IsValidObjectName(object) == false {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: bucket}, nil)
}
// Do not use filepath.Join() since filepath.Join strips off any object names with '/', use them as is
// in a static manner so that we can send a proper 'ObjectNotFound' reply back upon os.Stat()
objectPath := fs.root + "/" + bucket + "/" + object
stat, err := os.Stat(objectPath)
if os.IsNotExist(err) {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, nil)
}
_, err = os.Stat(objectPath + "$metadata")
if os.IsNotExist(err) {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, nil)
}
file, err := os.Open(objectPath + "$metadata")
defer file.Close()
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(err, nil)
}
var deserializedMetadata Metadata
decoder := json.NewDecoder(file)
err = decoder.Decode(&deserializedMetadata)
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(err, nil)
}
contentType := "application/octet-stream"
if deserializedMetadata.ContentType != "" {
contentType = deserializedMetadata.ContentType
}
contentType = strings.TrimSpace(contentType)
etag := bucket + "#" + filepath.Base(object)
if len(deserializedMetadata.Md5sum) != 0 {
etag = hex.EncodeToString(deserializedMetadata.Md5sum)
}
metadata := drivers.ObjectMetadata{
Bucket: bucket,
Key: object,
Created: stat.ModTime(),
Size: stat.Size(),
Md5: etag,
ContentType: contentType,
}
return metadata, nil
}
// ListObjects - GET bucket (list objects)
func (fs *fsDriver) ListObjects(bucket string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
p := bucketDir{}
p.files = make(map[string]os.FileInfo)
if drivers.IsValidBucket(bucket) == false {
return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if resources.Prefix != "" && drivers.IsValidObjectName(resources.Prefix) == false {
return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: resources.Prefix}, nil)
}
rootPrefix := filepath.Join(fs.root, bucket)
// check bucket exists
if _, err := os.Stat(rootPrefix); os.IsNotExist(err) {
return []drivers.ObjectMetadata{}, resources, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
p.root = rootPrefix
err := filepath.Walk(rootPrefix, p.getAllFiles)
if err != nil {
return []drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
var metadataList []drivers.ObjectMetadata
var metadata drivers.ObjectMetadata
// Populate filtering mode
resources.Mode = drivers.GetMode(resources)
var fileNames []string
for name := range p.files {
fileNames = append(fileNames, name)
}
sort.Strings(fileNames)
for _, name := range fileNames {
if len(metadataList) >= resources.Maxkeys {
resources.IsTruncated = true
if resources.IsTruncated && resources.IsDelimiterSet() {
resources.NextMarker = metadataList[len(metadataList)-1].Key
}
break
}
if name > resources.Marker {
metadata, resources, err = fs.filterObjects(bucket, name, p.files[name], resources)
if err != nil {
return []drivers.ObjectMetadata{}, resources, iodine.New(err, nil)
}
if metadata.Bucket != "" {
metadataList = append(metadataList, metadata)
}
}
}
sort.Sort(byObjectKey(metadataList))
return metadataList, resources, nil
}
func (fs *fsDriver) AbortMultipartUpload(bucket, key, uploadID string) error {
fs.lock.Lock()
defer fs.lock.Unlock()
// check bucket name valid
if drivers.IsValidBucket(bucket) == false {
return iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// verify object path legal
if drivers.IsValidObjectName(key) == false {
return iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: key}, nil)
}
if !fs.isValidUploadID(key, uploadID) {
return iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
}
bucketPath := filepath.Join(fs.root, bucket)
_, err := os.Stat(bucketPath)
// check bucket exists
if os.IsNotExist(err) {
return iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
if err != nil {
return iodine.New(drivers.InternalError{}, nil)
}
objectPath := filepath.Join(bucketPath, key)
multiPartfile, err := os.OpenFile(objectPath+"$multiparts", os.O_RDWR, 0600)
if err != nil {
return iodine.New(err, nil)
}
var deserializedMultipartSession MultipartSession
decoder := json.NewDecoder(multiPartfile)
err = decoder.Decode(&deserializedMultipartSession)
if err != nil {
return iodine.New(err, nil)
}
multiPartfile.Close() // close it right here, since we will delete it subsequently
delete(fs.multiparts.ActiveSession, key)
for _, part := range deserializedMultipartSession.Parts {
err = os.RemoveAll(objectPath + fmt.Sprintf("$%d", part.PartNumber))
if err != nil {
return iodine.New(err, nil)
}
}
err = os.RemoveAll(objectPath + "$multiparts")
if err != nil {
return iodine.New(err, nil)
}
return nil
}
// GetObject retrieves an object and writes it to a writer
func (d donutDriver) GetObject(w io.Writer, bucketName, objectName string) (int64, error) {
if d.donut == nil {
return 0, iodine.New(drivers.InternalError{}, nil)
}
if !drivers.IsValidBucket(bucketName) {
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(objectName) {
return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
}
if _, ok := d.storedBuckets[bucketName]; ok == false {
return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
}
d.lock.RLock()
defer d.lock.RUnlock()
objectKey := bucketName + "/" + objectName
data, ok := d.objects.Get(objectKey)
if !ok {
reader, size, err := d.donut.GetObject(bucketName, objectName)
if err != nil {
switch iodine.ToError(err).(type) {
case donut.BucketNotFound:
return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
case donut.ObjectNotFound:
return 0, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, nil)
default:
return 0, iodine.New(drivers.InternalError{}, nil)
}
}
pw := newProxyWriter(w)
n, err := io.CopyN(pw, reader, size)
if err != nil {
return 0, iodine.New(err, nil)
}
// Save in memory for future reads
d.objects.Set(objectKey, pw.writtenBytes)
// free up
pw.writtenBytes = nil
go debug.FreeOSMemory()
return n, nil
}
written, err := io.Copy(w, bytes.NewBuffer(data))
if err != nil {
return 0, iodine.New(err, nil)
}
return written, nil
}
// GetPartialObject retrieves an object range and writes it to a writer
func (d donutDriver) GetPartialObject(w io.Writer, bucketName, objectName string, start, length int64) (int64, error) {
d.lock.RLock()
defer d.lock.RUnlock()
if d.donut == nil {
return 0, iodine.New(drivers.InternalError{}, nil)
}
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
"start": strconv.FormatInt(start, 10),
"length": strconv.FormatInt(length, 10),
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
}
if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
}
if start < 0 {
return 0, iodine.New(drivers.InvalidRange{
Start: start,
Length: length,
}, errParams)
}
reader, size, err := d.donut.GetObject(bucketName, objectName)
if err != nil {
return 0, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, nil)
}
defer reader.Close()
if start > size || (start+length-1) > size {
return 0, iodine.New(drivers.InvalidRange{
Start: start,
Length: length,
}, errParams)
}
_, err = io.CopyN(ioutil.Discard, reader, start)
if err != nil {
return 0, iodine.New(err, errParams)
}
n, err := io.CopyN(w, reader, length)
if err != nil {
return 0, iodine.New(err, errParams)
}
return n, nil
}
// ListObjects - returns list of objects
func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
errParams := map[string]string{
"bucketName": bucketName,
}
if d.donut == nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(resources.Prefix) {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
}
actualObjects, commonPrefixes, isTruncated, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter,
resources.Maxkeys)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
}
resources.CommonPrefixes = commonPrefixes
resources.IsTruncated = isTruncated
if resources.IsTruncated && resources.IsDelimiterSet() {
resources.NextMarker = actualObjects[len(actualObjects)-1]
}
var results []drivers.ObjectMetadata
for _, objectName := range actualObjects {
objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
}
t, err := time.Parse(time.RFC3339Nano, objectMetadata["created"])
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, nil)
}
size, err := strconv.ParseInt(objectMetadata["size"], 10, 64)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, nil)
}
metadata := drivers.ObjectMetadata{
Key: objectName,
Created: t,
Size: size,
}
results = append(results, metadata)
}
sort.Sort(byObjectKey(results))
return results, resources, nil
}
// ListObjects - list objects from cache
func (cache *cacheDriver) ListObjects(bucket string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
cache.lock.RLock()
defer cache.lock.RUnlock()
if !drivers.IsValidBucket(bucket) {
return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(resources.Prefix) {
return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
}
if _, ok := cache.storedBuckets[bucket]; ok == false {
return nil, drivers.BucketResourcesMetadata{IsTruncated: false}, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
var results []drivers.ObjectMetadata
var keys []string
storedBucket := cache.storedBuckets[bucket]
for key := range storedBucket.objectMetadata {
if strings.HasPrefix(key, bucket+"/") {
key = key[len(bucket)+1:]
keys, resources = cache.listObjects(keys, key, resources)
}
}
var newKeys []string
switch {
case resources.Marker != "":
for _, key := range keys {
if key > resources.Marker {
newKeys = appendUniq(newKeys, key)
}
}
default:
newKeys = keys
}
sort.Strings(newKeys)
for _, key := range newKeys {
if len(results) == resources.Maxkeys {
resources.IsTruncated = true
if resources.IsTruncated && resources.IsDelimiterSet() {
resources.NextMarker = results[len(results)-1].Key
}
return results, resources, nil
}
object := storedBucket.objectMetadata[bucket+"/"+key]
results = append(results, object)
}
return results, resources, nil
}
// GetPartialObject - GET object from range
func (fs *fsDriver) GetPartialObject(w io.Writer, bucket, object string, start, length int64) (int64, error) {
// validate bucket
if drivers.IsValidBucket(bucket) == false {
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// validate object
if drivers.IsValidObjectName(object) == false {
return 0, iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: object}, nil)
}
objectPath := filepath.Join(fs.root, bucket, object)
filestat, err := os.Stat(objectPath)
switch err := err.(type) {
case nil:
{
if filestat.IsDir() {
return 0, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, nil)
}
}
default:
{
if os.IsNotExist(err) {
return 0, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, nil)
}
return 0, iodine.New(err, nil)
}
}
file, err := os.Open(objectPath)
if err != nil {
return 0, iodine.New(err, nil)
}
defer file.Close()
_, err = file.Seek(start, os.SEEK_SET)
if err != nil {
return 0, iodine.New(err, nil)
}
count, err := io.CopyN(w, file, length)
if err != nil {
return count, iodine.New(err, nil)
}
return count, nil
}
// GetObjectMetadata retrieves an object's metadata
func (d donutDriver) GetObjectMetadata(bucketName, objectName string) (drivers.ObjectMetadata, error) {
d.lock.RLock()
defer d.lock.RUnlock()
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
}
if d.donut == nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
}
if !drivers.IsValidObjectName(objectName) {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
}
if _, ok := d.storedBuckets[bucketName]; ok {
storedBucket := d.storedBuckets[bucketName]
objectKey := bucketName + "/" + objectName
if object, ok := storedBucket.objectMetadata[objectKey]; ok {
return object, nil
}
}
metadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, errParams)
}
objectMetadata := drivers.ObjectMetadata{
Bucket: bucketName,
Key: objectName,
ContentType: metadata.Metadata["contentType"],
Created: metadata.Created,
Md5: metadata.MD5Sum,
Size: metadata.Size,
}
return objectMetadata, nil
}
// GetObjectMetadata - get object metadata from cache
func (cache *cacheDriver) GetObjectMetadata(bucket, key string) (drivers.ObjectMetadata, error) {
cache.lock.RLock()
defer cache.lock.RUnlock()
// check if bucket exists
if !drivers.IsValidBucket(bucket) {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
if _, ok := cache.storedBuckets[bucket]; ok == false {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
storedBucket := cache.storedBuckets[bucket]
objectKey := bucket + "/" + key
if object, ok := storedBucket.objectMetadata[objectKey]; ok == true {
return object, nil
}
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: key}, nil)
}
// GetObject retrieves an object and writes it to a writer
func (d donutDriver) GetObject(target io.Writer, bucketName, objectName string) (int64, error) {
if d.donut == nil {
return 0, iodine.New(drivers.InternalError{}, nil)
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
}
reader, size, err := d.donut.GetObject(bucketName, objectName)
if err != nil {
return 0, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, nil)
}
n, err := io.CopyN(target, reader, size)
return n, iodine.New(err, nil)
}
// GetObjectMetadata retrieves an object's metadata
func (d donutDriver) GetObjectMetadata(bucketName, objectName string) (drivers.ObjectMetadata, error) {
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
}
if d.donut == nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) || strings.Contains(bucketName, ".") {
return drivers.ObjectMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
}
if !drivers.IsValidObjectName(objectName) || strings.TrimSpace(objectName) == "" {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
}
metadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, errParams)
}
created, err := time.Parse(time.RFC3339Nano, metadata["created"])
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(err, errParams)
}
size, err := strconv.ParseInt(metadata["size"], 10, 64)
if err != nil {
return drivers.ObjectMetadata{}, iodine.New(err, errParams)
}
objectMetadata := drivers.ObjectMetadata{
Bucket: bucketName,
Key: objectName,
ContentType: metadata["contentType"],
Created: created,
Md5: metadata["md5"],
Size: size,
}
return objectMetadata, nil
}
// ListObjects - returns list of objects
func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketResourcesMetadata) ([]drivers.ObjectMetadata, drivers.BucketResourcesMetadata, error) {
d.lock.RLock()
defer d.lock.RUnlock()
errParams := map[string]string{
"bucketName": bucketName,
}
if d.donut == nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.InternalError{}, errParams)
}
if !drivers.IsValidBucket(bucketName) {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(resources.Prefix) {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Object: resources.Prefix}, nil)
}
listObjects, err := d.donut.ListObjects(bucketName, resources.Prefix, resources.Marker, resources.Delimiter, resources.Maxkeys)
if err != nil {
return nil, drivers.BucketResourcesMetadata{}, iodine.New(err, errParams)
}
resources.CommonPrefixes = listObjects.CommonPrefixes
resources.IsTruncated = listObjects.IsTruncated
var results []drivers.ObjectMetadata
for _, objMetadata := range listObjects.Objects {
metadata := drivers.ObjectMetadata{
Key: objMetadata.Object,
Created: objMetadata.Created,
Size: objMetadata.Size,
}
results = append(results, metadata)
}
sort.Sort(byObjectName(results))
if resources.IsTruncated && resources.IsDelimiterSet() {
resources.NextMarker = results[len(results)-1].Key
}
return results, resources, nil
}
// GetObject - GET object from cache buffer
func (cache *cacheDriver) GetObject(w io.Writer, bucket string, object string) (int64, error) {
cache.lock.RLock()
if !drivers.IsValidBucket(bucket) {
cache.lock.RUnlock()
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(object) {
cache.lock.RUnlock()
return 0, iodine.New(drivers.ObjectNameInvalid{Object: object}, nil)
}
if _, ok := cache.storedBuckets[bucket]; ok == false {
cache.lock.RUnlock()
return 0, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
objectKey := bucket + "/" + object
data, ok := cache.objects.Get(objectKey)
if !ok {
cache.lock.RUnlock()
return 0, iodine.New(drivers.ObjectNotFound{Bucket: bucket, Object: object}, nil)
}
written, err := io.Copy(w, bytes.NewBuffer(data))
cache.lock.RUnlock()
return written, iodine.New(err, nil)
}
func (memory *memoryDriver) NewMultipartUpload(bucket, key, contentType string) (string, error) {
memory.lock.RLock()
if !drivers.IsValidBucket(bucket) {
memory.lock.RUnlock()
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
memory.lock.RUnlock()
return "", iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
if _, ok := memory.storedBuckets[bucket]; ok == false {
memory.lock.RUnlock()
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
storedBucket := memory.storedBuckets[bucket]
objectKey := bucket + "/" + key
if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
memory.lock.RUnlock()
return "", iodine.New(drivers.ObjectExists{Bucket: bucket, Object: key}, nil)
}
memory.lock.RUnlock()
memory.lock.Lock()
id := []byte(strconv.FormatInt(rand.Int63(), 10) + bucket + key + time.Now().String())
uploadIDSum := sha512.Sum512(id)
uploadID := base64.URLEncoding.EncodeToString(uploadIDSum[:])[:47]
memory.storedBuckets[bucket].multiPartSession[key] = multiPartSession{
uploadID: uploadID,
initiated: time.Now(),
totalParts: 0,
}
memory.lock.Unlock()
return uploadID, nil
}
// GetPartialObject retrieves an object range and writes it to a writer
func (d donutDriver) GetPartialObject(w io.Writer, bucketName, objectName string, start, length int64) (int64, error) {
d.lock.RLock()
defer d.lock.RUnlock()
if d.donut == nil {
return 0, iodine.New(drivers.InternalError{}, nil)
}
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
"start": strconv.FormatInt(start, 10),
"length": strconv.FormatInt(length, 10),
}
if !drivers.IsValidBucket(bucketName) {
return 0, iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, errParams)
}
if !drivers.IsValidObjectName(objectName) {
return 0, iodine.New(drivers.ObjectNameInvalid{Object: objectName}, errParams)
}
if start < 0 {
return 0, iodine.New(drivers.InvalidRange{
Start: start,
Length: length,
}, errParams)
}
if _, ok := d.storedBuckets[bucketName]; ok == false {
return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
}
objectKey := bucketName + "/" + objectName
data, ok := d.objects.Get(objectKey)
if !ok {
reader, size, err := d.donut.GetObject(bucketName, objectName)
if err != nil {
switch iodine.ToError(err).(type) {
case donut.BucketNotFound:
return 0, iodine.New(drivers.BucketNotFound{Bucket: bucketName}, nil)
case donut.ObjectNotFound:
return 0, iodine.New(drivers.ObjectNotFound{
Bucket: bucketName,
Object: objectName,
}, nil)
default:
return 0, iodine.New(drivers.InternalError{}, nil)
}
}
defer reader.Close()
if start > size || (start+length-1) > size {
return 0, iodine.New(drivers.InvalidRange{
Start: start,
Length: length,
}, errParams)
}
_, err = io.CopyN(ioutil.Discard, reader, start)
if err != nil {
return 0, iodine.New(err, errParams)
}
n, err := io.CopyN(w, reader, length)
if err != nil {
return 0, iodine.New(err, errParams)
}
return n, nil
}
written, err := io.CopyN(w, bytes.NewBuffer(data[start:]), length)
return written, iodine.New(err, nil)
}
// createObject - PUT object to memory buffer
func (memory *memoryDriver) createObjectPart(bucket, key, uploadID string, partID int, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
memory.lock.RLock()
if !drivers.IsValidBucket(bucket) {
memory.lock.RUnlock()
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
memory.lock.RUnlock()
return "", iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
if _, ok := memory.storedBuckets[bucket]; ok == false {
memory.lock.RUnlock()
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
storedBucket := memory.storedBuckets[bucket]
// get object key
partKey := bucket + "/" + getMultipartKey(key, uploadID, partID)
if _, ok := storedBucket.partMetadata[partKey]; ok == true {
memory.lock.RUnlock()
return storedBucket.partMetadata[partKey].ETag, nil
}
memory.lock.RUnlock()
if contentType == "" {
contentType = "application/octet-stream"
}
contentType = strings.TrimSpace(contentType)
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
// pro-actively close the connection
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
// calculate md5
hash := md5.New()
var readBytes []byte
var err error
var length int
for err == nil {
byteBuffer := make([]byte, 1024*1024)
length, err = data.Read(byteBuffer)
// While hash.Write() wouldn't mind a Nil byteBuffer
// It is necessary for us to verify this and break
if length == 0 {
break
}
hash.Write(byteBuffer[0:length])
readBytes = append(readBytes, byteBuffer[0:length]...)
}
if err != io.EOF {
return "", iodine.New(err, nil)
}
go debug.FreeOSMemory()
md5SumBytes := hash.Sum(nil)
totalLength := int64(len(readBytes))
memory.lock.Lock()
memory.multiPartObjects.Set(partKey, readBytes)
memory.lock.Unlock()
// setting up for de-allocation
readBytes = nil
md5Sum := hex.EncodeToString(md5SumBytes)
// Verify if the written object is equal to what is expected, only if it is requested as such
if strings.TrimSpace(expectedMD5Sum) != "" {
if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucket, Key: key}, nil)
}
}
newPart := drivers.PartMetadata{
PartNumber: partID,
LastModified: time.Now().UTC(),
ETag: md5Sum,
Size: totalLength,
}
memory.lock.Lock()
storedBucket.partMetadata[partKey] = newPart
multiPartSession := storedBucket.multiPartSession[key]
multiPartSession.totalParts++
storedBucket.multiPartSession[key] = multiPartSession
memory.storedBuckets[bucket] = storedBucket
memory.lock.Unlock()
return md5Sum, nil
}
func (memory *memoryDriver) CompleteMultipartUpload(bucket, key, uploadID string, parts map[int]string) (string, error) {
if !drivers.IsValidBucket(bucket) {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
return "", iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
// Verify upload id
memory.lock.RLock()
if _, ok := memory.storedBuckets[bucket]; ok == false {
memory.lock.RUnlock()
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
storedBucket := memory.storedBuckets[bucket]
if storedBucket.multiPartSession[key].uploadID != uploadID {
memory.lock.RUnlock()
return "", iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
}
memory.lock.RUnlock()
memory.lock.Lock()
var size int64
var fullObject bytes.Buffer
for i := 1; i <= len(parts); i++ {
recvMD5 := parts[i]
object, ok := memory.multiPartObjects.Get(bucket + "/" + getMultipartKey(key, uploadID, i))
if ok == false {
memory.lock.Unlock()
return "", iodine.New(errors.New("missing part: "+strconv.Itoa(i)), nil)
}
size += int64(len(object))
calcMD5Bytes := md5.Sum(object)
// complete multi part request header md5sum per part is hex encoded
recvMD5Bytes, err := hex.DecodeString(strings.Trim(recvMD5, "\""))
if err != nil {
return "", iodine.New(drivers.InvalidDigest{Md5: recvMD5}, nil)
}
if !bytes.Equal(recvMD5Bytes, calcMD5Bytes[:]) {
return "", iodine.New(drivers.BadDigest{Md5: recvMD5, Bucket: bucket, Key: getMultipartKey(key, uploadID, i)}, nil)
}
_, err = io.Copy(&fullObject, bytes.NewBuffer(object))
if err != nil {
return "", iodine.New(err, nil)
}
object = nil
go debug.FreeOSMemory()
}
memory.lock.Unlock()
md5sumSlice := md5.Sum(fullObject.Bytes())
// this is needed for final verification inside CreateObject, do not convert this to hex
md5sum := base64.StdEncoding.EncodeToString(md5sumSlice[:])
etag, err := memory.CreateObject(bucket, key, "", md5sum, size, &fullObject)
if err != nil {
// No need to call internal cleanup functions here, caller will call AbortMultipartUpload()
// which would in-turn cleanup properly in accordance with S3 Spec
return "", iodine.New(err, nil)
}
fullObject.Reset()
memory.cleanupMultiparts(bucket, key, uploadID)
memory.cleanupMultipartSession(bucket, key, uploadID)
return etag, nil
}
// CreateObject - PUT object
func (fs *fsDriver) CreateObject(bucket, key, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
fs.lock.Lock()
defer fs.lock.Unlock()
// check bucket name valid
if drivers.IsValidBucket(bucket) == false {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// check bucket exists
if _, err := os.Stat(filepath.Join(fs.root, bucket)); os.IsNotExist(err) {
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
// verify object path legal
if drivers.IsValidObjectName(key) == false {
return "", iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: key}, nil)
}
// verify content type
if contentType == "" {
contentType = "application/octet-stream"
}
contentType = strings.TrimSpace(contentType)
// get object path
objectPath := filepath.Join(fs.root, bucket, key)
objectDir := filepath.Dir(objectPath)
if _, err := os.Stat(objectDir); os.IsNotExist(err) {
err = os.MkdirAll(objectDir, 0700)
if err != nil {
return "", iodine.New(err, nil)
}
}
// check if object exists
if _, err := os.Stat(objectPath); !os.IsNotExist(err) {
return "", iodine.New(drivers.ObjectExists{
Bucket: bucket,
Object: key,
}, nil)
}
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
// pro-actively close the connection
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
// write object
file, err := os.OpenFile(objectPath, os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer file.Close()
h := md5.New()
mw := io.MultiWriter(file, h)
_, err = io.CopyN(mw, data, size)
if err != nil {
return "", iodine.New(err, nil)
}
file, err = os.OpenFile(objectPath+"$metadata", os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer file.Close()
metadata := &Metadata{
ContentType: contentType,
Md5sum: h.Sum(nil),
}
// serialize metadata to json
encoder := json.NewEncoder(file)
err = encoder.Encode(metadata)
md5Sum := hex.EncodeToString(metadata.Md5sum)
// Verify if the written object is equal to what is expected, only if it is requested as such
if strings.TrimSpace(expectedMD5Sum) != "" {
if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucket, Key: key}, nil)
}
}
return md5Sum, nil
}
func (fs *fsDriver) NewMultipartUpload(bucket, key, contentType string) (string, error) {
fs.lock.Lock()
defer fs.lock.Unlock()
if !drivers.IsValidBucket(bucket) {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
return "", iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
bucketPath := filepath.Join(fs.root, bucket)
_, err := os.Stat(bucketPath)
// check bucket exists
if os.IsNotExist(err) {
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
if err != nil {
return "", iodine.New(drivers.InternalError{}, nil)
}
objectPath := filepath.Join(bucketPath, key)
objectDir := filepath.Dir(objectPath)
if _, err := os.Stat(objectDir); os.IsNotExist(err) {
err = os.MkdirAll(objectDir, 0700)
if err != nil {
return "", iodine.New(err, nil)
}
}
// check if object exists
if _, err := os.Stat(objectPath); !os.IsNotExist(err) {
return "", iodine.New(drivers.ObjectExists{
Bucket: bucket,
Object: key,
}, nil)
}
var activeSessionFile *os.File
_, err = os.Stat(bucketPath + "$activeSession")
switch {
case os.IsNotExist(err):
activeSessionFile, err = os.OpenFile(bucketPath+"$activeSession", os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
default:
activeSessionFile, err = os.OpenFile(bucketPath+"$activeSession", os.O_WRONLY|os.O_APPEND, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
}
defer activeSessionFile.Close()
id := []byte(strconv.FormatInt(rand.Int63(), 10) + bucket + key + time.Now().String())
uploadIDSum := sha512.Sum512(id)
uploadID := base64.URLEncoding.EncodeToString(uploadIDSum[:])[:47]
multiPartfile, err := os.OpenFile(objectPath+"$multiparts", os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer multiPartfile.Close()
mpartSession := new(MultipartSession)
mpartSession.TotalParts = 0
mpartSession.UploadID = uploadID
mpartSession.Initiated = time.Now().UTC()
var parts []*drivers.PartMetadata
mpartSession.Parts = parts
fs.multiparts.ActiveSession[key] = mpartSession
encoder := json.NewEncoder(multiPartfile)
err = encoder.Encode(mpartSession)
if err != nil {
return "", iodine.New(err, nil)
}
encoder = json.NewEncoder(activeSessionFile)
err = encoder.Encode(fs.multiparts.ActiveSession)
if err != nil {
return "", iodine.New(err, nil)
}
return uploadID, nil
}
func (fs *fsDriver) CreateObjectPart(bucket, key, uploadID string, partID int, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
fs.lock.Lock()
defer fs.lock.Unlock()
if partID <= 0 {
return "", iodine.New(errors.New("invalid part id, cannot be zero or less than zero"), nil)
}
// check bucket name valid
if drivers.IsValidBucket(bucket) == false {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// verify object path legal
if drivers.IsValidObjectName(key) == false {
return "", iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: key}, nil)
}
if !fs.isValidUploadID(key, uploadID) {
return "", iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
}
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
// pro-actively close the connection
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
bucketPath := filepath.Join(fs.root, bucket)
_, err := os.Stat(bucketPath)
// check bucket exists
if os.IsNotExist(err) {
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
if err != nil {
return "", iodine.New(drivers.InternalError{}, nil)
}
objectPath := filepath.Join(bucketPath, key)
objectDir := filepath.Dir(objectPath)
if _, err := os.Stat(objectDir); os.IsNotExist(err) {
err = os.MkdirAll(objectDir, 0700)
if err != nil {
return "", iodine.New(err, nil)
}
}
// check if object exists
if _, err := os.Stat(objectPath); !os.IsNotExist(err) {
return "", iodine.New(drivers.ObjectExists{
Bucket: bucket,
Object: key,
}, nil)
}
partMetadata, err := fs.writePart(objectPath, partID, size, data)
if err != nil {
return "", iodine.New(err, nil)
}
// Verify if the written object is equal to what is expected, only if it is requested as such
if strings.TrimSpace(expectedMD5Sum) != "" {
if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), partMetadata.ETag); err != nil {
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucket, Key: key}, nil)
}
}
multiPartfile, err := os.OpenFile(objectPath+"$multiparts", os.O_RDWR|os.O_APPEND, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer multiPartfile.Close()
var deserializedMultipartSession MultipartSession
decoder := json.NewDecoder(multiPartfile)
err = decoder.Decode(&deserializedMultipartSession)
if err != nil {
return "", iodine.New(err, nil)
}
deserializedMultipartSession.Parts = append(deserializedMultipartSession.Parts, &partMetadata)
deserializedMultipartSession.TotalParts++
fs.multiparts.ActiveSession[key] = &deserializedMultipartSession
sort.Sort(partNumber(deserializedMultipartSession.Parts))
encoder := json.NewEncoder(multiPartfile)
err = encoder.Encode(&deserializedMultipartSession)
if err != nil {
return "", iodine.New(err, nil)
}
return partMetadata.ETag, nil
}
func (fs *fsDriver) CompleteMultipartUpload(bucket, key, uploadID string, parts map[int]string) (string, error) {
fs.lock.Lock()
defer fs.lock.Unlock()
// check bucket name valid
if drivers.IsValidBucket(bucket) == false {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// verify object path legal
if drivers.IsValidObjectName(key) == false {
return "", iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: key}, nil)
}
if !fs.isValidUploadID(key, uploadID) {
return "", iodine.New(drivers.InvalidUploadID{UploadID: uploadID}, nil)
}
bucketPath := filepath.Join(fs.root, bucket)
_, err := os.Stat(bucketPath)
// check bucket exists
if os.IsNotExist(err) {
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
if err != nil {
return "", iodine.New(drivers.InternalError{}, nil)
}
objectPath := filepath.Join(bucketPath, key)
// check if object exists
if _, err := os.Stat(objectPath); !os.IsNotExist(err) {
return "", iodine.New(drivers.ObjectExists{
Bucket: bucket,
Object: key,
}, nil)
}
file, err := os.OpenFile(objectPath, os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer file.Close()
h := md5.New()
mw := io.MultiWriter(file, h)
err = fs.concatParts(parts, objectPath, mw)
if err != nil {
return "", iodine.New(err, nil)
}
md5sum := hex.EncodeToString(h.Sum(nil))
delete(fs.multiparts.ActiveSession, key)
for partNumber := range parts {
err = os.Remove(objectPath + fmt.Sprintf("$%d", partNumber))
if err != nil {
return "", iodine.New(err, nil)
}
}
err = os.Remove(objectPath + "$multiparts")
if err != nil {
return "", iodine.New(err, nil)
}
file, err = os.OpenFile(objectPath+"$metadata", os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer file.Close()
metadata := &Metadata{
ContentType: "application/octet-stream",
Md5sum: h.Sum(nil),
}
// serialize metadata to json
encoder := json.NewEncoder(file)
err = encoder.Encode(metadata)
if err != nil {
return "", iodine.New(err, nil)
}
activeSessionFile, err := os.OpenFile(bucketPath+"$activeSession", os.O_WRONLY|os.O_TRUNC, 0600)
if err != nil {
return "", iodine.New(err, nil)
}
defer activeSessionFile.Close()
encoder = json.NewEncoder(activeSessionFile)
err = encoder.Encode(fs.multiparts.ActiveSession)
if err != nil {
return "", iodine.New(err, nil)
}
return md5sum, nil
}
func (fs *fsDriver) ListObjectParts(bucket, key string, resources drivers.ObjectResourcesMetadata) (drivers.ObjectResourcesMetadata, error) {
fs.lock.Lock()
defer fs.lock.Unlock()
// load from disk
fs.loadActiveSessions(bucket)
// check bucket name valid
if drivers.IsValidBucket(bucket) == false {
return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
// verify object path legal
if drivers.IsValidObjectName(key) == false {
return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.ObjectNameInvalid{Bucket: bucket, Object: key}, nil)
}
if !fs.isValidUploadID(key, resources.UploadID) {
return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.InvalidUploadID{UploadID: resources.UploadID}, nil)
}
objectResourcesMetadata := resources
objectResourcesMetadata.Bucket = bucket
objectResourcesMetadata.Key = key
var startPartNumber int
switch {
case objectResourcesMetadata.PartNumberMarker == 0:
startPartNumber = 1
default:
startPartNumber = objectResourcesMetadata.PartNumberMarker
}
bucketPath := filepath.Join(fs.root, bucket)
_, err := os.Stat(bucketPath)
// check bucket exists
if os.IsNotExist(err) {
return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
if err != nil {
return drivers.ObjectResourcesMetadata{}, iodine.New(drivers.InternalError{}, nil)
}
objectPath := filepath.Join(bucketPath, key)
multiPartfile, err := os.OpenFile(objectPath+"$multiparts", os.O_RDONLY, 0600)
if err != nil {
return drivers.ObjectResourcesMetadata{}, iodine.New(err, nil)
}
defer multiPartfile.Close()
var deserializedMultipartSession MultipartSession
decoder := json.NewDecoder(multiPartfile)
err = decoder.Decode(&deserializedMultipartSession)
if err != nil {
return drivers.ObjectResourcesMetadata{}, iodine.New(err, nil)
}
var parts []*drivers.PartMetadata
for i := startPartNumber; i <= deserializedMultipartSession.TotalParts; i++ {
if len(parts) > objectResourcesMetadata.MaxParts {
sort.Sort(partNumber(parts))
objectResourcesMetadata.IsTruncated = true
objectResourcesMetadata.Part = parts
objectResourcesMetadata.NextPartNumberMarker = i
return objectResourcesMetadata, nil
}
parts = append(parts, deserializedMultipartSession.Parts[i-1])
}
sort.Sort(partNumber(parts))
objectResourcesMetadata.Part = parts
return objectResourcesMetadata, nil
}
// createObject - PUT object to cache buffer
func (cache *cacheDriver) createObject(bucket, key, contentType, expectedMD5Sum string, size int64, data io.Reader) (string, error) {
cache.lock.RLock()
if !drivers.IsValidBucket(bucket) {
cache.lock.RUnlock()
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucket}, nil)
}
if !drivers.IsValidObjectName(key) {
cache.lock.RUnlock()
return "", iodine.New(drivers.ObjectNameInvalid{Object: key}, nil)
}
if _, ok := cache.storedBuckets[bucket]; ok == false {
cache.lock.RUnlock()
return "", iodine.New(drivers.BucketNotFound{Bucket: bucket}, nil)
}
storedBucket := cache.storedBuckets[bucket]
// get object key
objectKey := bucket + "/" + key
if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
cache.lock.RUnlock()
return "", iodine.New(drivers.ObjectExists{Bucket: bucket, Object: key}, nil)
}
cache.lock.RUnlock()
if contentType == "" {
contentType = "application/octet-stream"
}
contentType = strings.TrimSpace(contentType)
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
// pro-actively close the connection
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
// calculate md5
hash := md5.New()
var readBytes []byte
var err error
var length int
for err == nil {
byteBuffer := make([]byte, 1024*1024)
length, err = data.Read(byteBuffer)
// While hash.Write() wouldn't mind a Nil byteBuffer
// It is necessary for us to verify this and break
if length == 0 {
break
}
hash.Write(byteBuffer[0:length])
readBytes = append(readBytes, byteBuffer[0:length]...)
}
if err != io.EOF {
return "", iodine.New(err, nil)
}
md5SumBytes := hash.Sum(nil)
totalLength := len(readBytes)
cache.lock.Lock()
ok := cache.objects.Set(objectKey, readBytes)
// setting up for de-allocation
readBytes = nil
go debug.FreeOSMemory()
cache.lock.Unlock()
if !ok {
return "", iodine.New(drivers.InternalError{}, nil)
}
md5Sum := hex.EncodeToString(md5SumBytes)
// Verify if the written object is equal to what is expected, only if it is requested as such
if strings.TrimSpace(expectedMD5Sum) != "" {
if err := isMD5SumEqual(strings.TrimSpace(expectedMD5Sum), md5Sum); err != nil {
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucket, Key: key}, nil)
}
}
newObject := drivers.ObjectMetadata{
Bucket: bucket,
Key: key,
ContentType: contentType,
Created: time.Now().UTC(),
Md5: md5Sum,
Size: int64(totalLength),
}
cache.lock.Lock()
storedBucket.objectMetadata[objectKey] = newObject
cache.storedBuckets[bucket] = storedBucket
cache.lock.Unlock()
return newObject.Md5, nil
}
// CreateObject creates a new object
func (d donutDriver) CreateObject(bucketName, objectName, contentType, expectedMD5Sum string, size int64, reader io.Reader) (string, error) {
d.lock.Lock()
defer d.lock.Unlock()
errParams := map[string]string{
"bucketName": bucketName,
"objectName": objectName,
"contentType": contentType,
}
if d.donut == nil {
return "", iodine.New(drivers.InternalError{}, errParams)
}
// TODO - Should be able to write bigger than cache
if size > int64(d.maxSize) {
generic := drivers.GenericObjectError{Bucket: bucketName, Object: objectName}
return "", iodine.New(drivers.EntityTooLarge{
GenericObjectError: generic,
Size: strconv.FormatInt(size, 10),
MaxSize: strconv.FormatUint(d.maxSize, 10),
}, nil)
}
if !drivers.IsValidBucket(bucketName) {
return "", iodine.New(drivers.BucketNameInvalid{Bucket: bucketName}, nil)
}
if !drivers.IsValidObjectName(objectName) {
return "", iodine.New(drivers.ObjectNameInvalid{Object: objectName}, nil)
}
storedBucket := d.storedBuckets[bucketName]
// get object key
objectKey := bucketName + "/" + objectName
if _, ok := storedBucket.objectMetadata[objectKey]; ok == true {
return "", iodine.New(drivers.ObjectExists{Bucket: bucketName, Object: objectName}, nil)
}
if strings.TrimSpace(contentType) == "" {
contentType = "application/octet-stream"
}
metadata := make(map[string]string)
metadata["contentType"] = strings.TrimSpace(contentType)
metadata["contentLength"] = strconv.FormatInt(size, 10)
if strings.TrimSpace(expectedMD5Sum) != "" {
expectedMD5SumBytes, err := base64.StdEncoding.DecodeString(strings.TrimSpace(expectedMD5Sum))
if err != nil {
return "", iodine.New(drivers.InvalidDigest{Md5: expectedMD5Sum}, nil)
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
objMetadata, err := d.donut.PutObject(bucketName, objectName, expectedMD5Sum, reader, metadata)
if err != nil {
switch iodine.ToError(err).(type) {
case donut.BadDigest:
return "", iodine.New(drivers.BadDigest{Md5: expectedMD5Sum, Bucket: bucketName, Key: objectName}, nil)
}
return "", iodine.New(err, errParams)
}
newObject := drivers.ObjectMetadata{
Bucket: bucketName,
Key: objectName,
ContentType: objMetadata.Metadata["contentType"],
Created: objMetadata.Created,
Md5: objMetadata.MD5Sum,
Size: objMetadata.Size,
}
storedBucket.objectMetadata[objectKey] = newObject
d.storedBuckets[bucketName] = storedBucket
return newObject.Md5, nil
}