Added metadata, IO pipe instead of byte transfer.

service/service.go

@@ -0,0 +1,65 @@
+package service
+
+import (
+	"fmt"
+	"fs/metadata"
+	"fs/models"
+	"fs/storage"
+	"io"
+	"strings"
+	"time"
+)
+
+type ObjectService struct {
+	metadataHandler *metadata.MetadataHandler
+}
+
+func NewObjectService(metadataHandler *metadata.MetadataHandler) *ObjectService {
+	return &ObjectService{metadataHandler: metadataHandler}
+}
+
+func (s *ObjectService) PutObject(uri string, contentType string, input io.Reader) (*models.ObjectManifest, error) {
+
+	bucket := strings.Split(uri, "/")[0]
+	key := strings.Join(strings.Split(uri, "/")[1:], "/")
+
+	chunks, size, etag, err := storage.IngestStream(input)
+	if err != nil {
+		return nil, err
+	}
+	timestamp := time.Now().Unix()
+
+	manifest := &models.ObjectManifest{
+		Bucket:      bucket,
+		Key:         key,
+		Size:        size,
+		ContentType: contentType,
+		ETag:        etag,
+		Chunks:      chunks,
+		CreatedAt:   timestamp,
+	}
+	fmt.Println(manifest)
+	if err = s.metadataHandler.PutManifest(manifest); err != nil {
+		return nil, err
+	}
+
+	return manifest, nil
+}
+
+func (s *ObjectService) GetObject(bucket, key string) (io.ReadCloser, *models.ObjectManifest, error) {
+	manifest, err := s.metadataHandler.GetManifest(bucket, key)
+	if err != nil {
+		return nil, nil, err
+	}
+	pr, pw := io.Pipe()
+
+	go func() {
+		defer pw.Close()
+
+		err := storage.AssembleStream(manifest.Chunks, pw)
+		if err != nil {
+			return
+		}
+	}()
+	return pr, manifest, nil
+}