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122 lines
3.1 KiB
122 lines
3.1 KiB
package inmemory
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import (
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"bytes"
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"crypto/sha256"
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"fmt"
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"io"
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"log"
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"strings"
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"time"
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mstorage "github.com/minio-io/minio/pkg/storage"
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)
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type storage struct {
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bucketdata map[string]storedBucket
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objectdata map[string]storedObject
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}
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type storedBucket struct {
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metadata mstorage.BucketMetadata
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// owner string // TODO
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// id string // TODO
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}
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type storedObject struct {
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metadata mstorage.ObjectMetadata
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data []byte
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}
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func (storage *storage) CopyObjectToWriter(w io.Writer, bucket string, object string) (int64, error) {
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// TODO synchronize access
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// get object
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key := bucket + ":" + object
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if val, ok := storage.objectdata[key]; ok {
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objectBuffer := bytes.NewBuffer(val.data)
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written, err := io.Copy(w, objectBuffer)
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return written, err
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} else {
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return 0, mstorage.ObjectNotFound{Bucket: bucket, Path: object}
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}
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}
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func (storage *storage) StoreObject(bucket string, key string, data io.Reader) error {
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objectKey := bucket + ":" + key
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if _, ok := storage.objectdata[objectKey]; ok == true {
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return mstorage.ObjectExists{Bucket: bucket, Key: key}
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}
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var bytesBuffer bytes.Buffer
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newObject := storedObject{}
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if _, ok := io.Copy(&bytesBuffer, data); ok == nil {
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size := bytesBuffer.Len()
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etag := fmt.Sprintf("%x", sha256.Sum256(bytesBuffer.Bytes()))
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newObject.metadata = mstorage.ObjectMetadata{
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Key: key,
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Created: time.Now(),
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Size: size,
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ETag: etag,
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}
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newObject.data = bytesBuffer.Bytes()
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}
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storage.objectdata[objectKey] = newObject
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return nil
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}
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func (storage *storage) StoreBucket(bucketName string) error {
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if !mstorage.IsValidBucket(bucketName) {
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return mstorage.BucketNameInvalid{Bucket: bucketName}
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}
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if _, ok := storage.bucketdata[bucketName]; ok == true {
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return mstorage.BucketExists{Bucket: bucketName}
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}
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newBucket := storedBucket{}
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newBucket.metadata = mstorage.BucketMetadata{
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Name: bucketName,
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Created: time.Now(),
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}
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log.Println(bucketName)
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storage.bucketdata[bucketName] = newBucket
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return nil
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}
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func (storage *storage) ListObjects(bucket, prefix string, count int) []mstorage.ObjectMetadata {
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// TODO prefix and count handling
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var results []mstorage.ObjectMetadata
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for key, object := range storage.objectdata {
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if strings.HasPrefix(key, bucket+":") {
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results = append(results, object.metadata)
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}
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}
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return results
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}
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func (storage *storage) ListBuckets(prefix string) []mstorage.BucketMetadata {
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// TODO prefix handling
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var results []mstorage.BucketMetadata
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for _, bucket := range storage.bucketdata {
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results = append(results, bucket.metadata)
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}
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return results
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}
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func Start() (chan<- string, <-chan error, *storage) {
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ctrlChannel := make(chan string)
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errorChannel := make(chan error)
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go start(ctrlChannel, errorChannel)
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return ctrlChannel, errorChannel, &storage{
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bucketdata: make(map[string]storedBucket),
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objectdata: make(map[string]storedObject),
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}
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}
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func start(ctrlChannel <-chan string, errorChannel chan<- error) {
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close(errorChannel)
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}
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func (storage *storage) GetObjectMetadata(bucket, key string) mstorage.ObjectMetadata {
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objectKey := bucket + ":" + key
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return storage.objectdata[objectKey].metadata
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}
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