Add support for meta data in S3Store

s3store/s3store.go

@@ -29,6 +29,10 @@
 // created. Whenever a new chunk is uploaded to tusd using a PATCH request, a
 // new part is pushed to the multipart upload on S3.
 //
+// If meta data is associated with the upload during creation, it will be added
+// to the multipart upload and after finishing it, the meta data will be passed
+// to the final object.
+//
 // Once the upload is finish, the multipart upload is completed, resulting in
 // the entire file being stored in the bucket. The info object, containing
 // meta data is not deleted. It is recommended to copy the finished upload to
@@ -151,10 +155,20 @@ func (store S3Store) NewUpload(info tusd.FileInfo) (id string, err error) {
 		return "", err
 	}
 
+	// Convert meta data into a map of pointers for AWS Go SDK, sigh.
+	metadata := make(map[string]*string, len(info.MetaData))
+	for key, value := range info.MetaData {
+		// Copying the value is required in order to prevent it from being
+		// overwritten by the next iteration.
+		v := value
+		metadata[key] = &v
+	}
+
 	// Create the actual multipart upload
 	res, err := store.Service.CreateMultipartUpload(&s3.CreateMultipartUploadInput{
 		Bucket:   aws.String(store.Bucket),
 		Key:      aws.String(uploadId),
+		Metadata: metadata,
 	})
 	if err != nil {
 		return "", err

s3store/s3store_test.go

@@ -28,16 +28,23 @@ func TestNewUpload(t *testing.T) {
 	assert.Equal(store.Bucket, "bucket")
 	assert.Equal(store.Service, s3obj)
 
+	s1 := "hello"
+	s2 := "world"
+
 	gomock.InOrder(
 		s3obj.EXPECT().PutObject(&s3.PutObjectInput{
 			Bucket:        aws.String("bucket"),
 			Key:           aws.String("uploadId.info"),
-			Body:          bytes.NewReader([]byte(`{"ID":"uploadId","Size":500,"Offset":0,"MetaData":null,"IsPartial":false,"IsFinal":false,"PartialUploads":null}`)),
+			Body:          bytes.NewReader([]byte(`{"ID":"uploadId","Size":500,"Offset":0,"MetaData":{"bar":"world","foo":"hello"},"IsPartial":false,"IsFinal":false,"PartialUploads":null}`)),
-			ContentLength: aws.Int64(int64(111)),
+			ContentLength: aws.Int64(int64(136)),
 		}),
 		s3obj.EXPECT().CreateMultipartUpload(&s3.CreateMultipartUploadInput{
 			Bucket: aws.String("bucket"),
 			Key:    aws.String("uploadId"),
+			Metadata: map[string]*string{
+				"foo": &s1,
+				"bar": &s2,
+			},
 		}).Return(&s3.CreateMultipartUploadOutput{
 			UploadId: aws.String("multipartId"),
 		}, nil),
@@ -46,6 +53,10 @@ func TestNewUpload(t *testing.T) {
 	info := tusd.FileInfo{
 		ID:   "uploadId",
 		Size: 500,
+		MetaData: map[string]string{
+			"foo": "hello",
+			"bar": "world",
+		},
 	}
 
 	id, err := store.NewUpload(info)