fix: made content-length check non mandatory as per RFC

pkg/api/dirs.go

@@ -91,10 +91,6 @@ func (s *Service) dirUploadHandler(
 			jsonhttp.BadRequest(w, errEmptyDir)
 		case errors.Is(err, tar.ErrHeader):
 			jsonhttp.BadRequest(w, "invalid filename in tar archive")
-		case errors.Is(err, ErrMissingContentLenHeader):
-			jsonhttp.BadRequest(w, "missing Content-Length header")
-		case errors.Is(err, ErrMissingContentTypeHeader):
-			jsonhttp.BadRequest(w, "missing Content-Type header")
 		default:
 			jsonhttp.InternalServerError(w, errDirectoryStore)
 		}
@@ -270,11 +266,6 @@ type multipartReader struct {
 	r *multipart.Reader
 }
 
-var (
-	ErrMissingContentLenHeader  = errors.New("content-length missing")
-	ErrMissingContentTypeHeader = errors.New("content-type missing")
-)
-
 func (m *multipartReader) Next() (*FileInfo, error) {
 	part, err := m.r.NextPart()
 	if err != nil {
@@ -285,25 +276,14 @@ func (m *multipartReader) Next() (*FileInfo, error) {
 	if filePath == "" {
 		filePath = part.FormName()
 	}
-	if filePath == "" {
-		return nil, errors.New("filepath missing")
-	}
 
 	fileName := filepath.Base(filePath)
 
 	contentType := part.Header.Get(ContentTypeHeader)
-	if contentType == "" {
-		return nil, ErrMissingContentTypeHeader
-	}
 
 	contentLength := part.Header.Get(ContentLengthHeader)
-	if contentLength == "" {
-		return nil, ErrMissingContentLenHeader
-	}
-	fileSize, err := strconv.ParseInt(contentLength, 10, 64)
-	if err != nil {
-		return nil, errors.New("invalid file size")
-	}
+
+	fileSize, _ := strconv.ParseInt(contentLength, 10, 64)
 
 	return &FileInfo{
 		Path:        filePath,

pkg/api/dirs_test.go

@@ -93,26 +93,6 @@ func TestDirs(t *testing.T) {
 		)
 	})
 
-	t.Run("missing content type", func(t *testing.T) {
-		tarReader, mwBoundary := multipartFiles(t, []f{{
-			data: []byte("robots text"),
-			name: "robots.txt",
-			// header left empty on purpose
-		}})
-
-		jsonhttptest.Request(t, client, http.MethodPost, dirUploadResource, http.StatusBadRequest,
-			jsonhttptest.WithRequestHeader(api.SwarmPostageBatchIdHeader, batchOkStr),
-			jsonhttptest.WithRequestBody(tarReader),
-			jsonhttptest.WithRequestHeader(api.SwarmCollectionHeader, "True"),
-			jsonhttptest.WithRequestHeader(api.ContentTypeHeader, fmt.Sprintf("multipart/form-data; boundary=%q", mwBoundary)),
-			jsonhttptest.WithExpectedJSONResponse(jsonhttp.StatusResponse{
-				Message: "missing Content-Type header",
-				Code:    http.StatusBadRequest,
-			}),
-			jsonhttptest.WithRequestHeader(api.ContentTypeHeader, "multipart/form-data"),
-		)
-	})
-
 	// valid tars
 	for _, tc := range []struct {
 		name                string