func extractMetadataFromReq(ctx context.Context, r *http.Request) (metadata map[string]string, err error) {
	return extractMetadata(ctx, textproto.MIMEHeader(r.Form), textproto.MIMEHeader(r.Header))
}

func extractMetadata(ctx context.Context, mimesHeader ...textproto.MIMEHeader) (metadata map[string]string, err error) {
	metadata = make(map[string]string)

	for _, hdr := range mimesHeader {
		// Extract all query values.

		},
	}

	// Validate if the extracting headers.
	for i, testCase := range testCases {
		metadata := make(map[string]string)
		err := extractMetadataFromMime(context.Background(), textproto.MIMEHeader(testCase.header), metadata)
		if err != nil && !testCase.shouldFail {
			t.Fatalf("Test %d failed to extract metadata: %v", i+1, err)
		}
		if err == nil && testCase.shouldFail {

			hashReader.SetExpectedMax(lengthRange.Max)
		}
	}

	// Extract metadata to be saved from received Form.
	metadata := make(map[string]string)
	err = extractMetadataFromMime(ctx, textproto.MIMEHeader(formValues), metadata)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	rawReader := hashReader
	pReader := NewPutObjReader(rawReader)

					continue
				}
				if strings.HasPrefix(k, "minio.metadata.") {
					k = strings.TrimPrefix(k, "minio.metadata.")
					hdrs.Set(k, v)
				}
			}
			m, err := extractMetadata(ctx, textproto.MIMEHeader(hdrs))
			if err != nil {
				return err
			}
			for k, v := range m {
				metadata[k] = v
			}
		} else {
			versionID = r.Form.Get(xhttp.VersionID)
			hdrs = r.Header
		}