s3: ListParts output xml format

fix https://github.com/chrislusf/seaweedfs/issues/1461

weed/s3api/filer_multipart_test.go

@@ -4,6 +4,7 @@ import (
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"testing"
+	"time"
 )
 
 func TestInitiateMultipartUploadResult(t *testing.T) {
@@ -24,3 +25,25 @@ func TestInitiateMultipartUploadResult(t *testing.T) {
 	}
 
 }
+
+func TestListPartsResult(t *testing.T) {
+
+	expected := `<?xml version="1.0" encoding="UTF-8"?>
+<ListPartsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"><Part><ETag>&#34;12345678&#34;</ETag><LastModified>1970-01-01T00:00:00Z</LastModified><PartNumber>1</PartNumber><Size>123</Size></Part></ListPartsResult>`
+	response := &ListPartsResult{
+		Part: []*s3.Part{
+			{
+				PartNumber:   aws.Int64(int64(1)),
+				LastModified: aws.Time(time.Unix(0, 0).UTC()),
+				Size:         aws.Int64(int64(123)),
+				ETag:         aws.String("\"12345678\""),
+			},
+		},
+	}
+
+	encoded := string(encodeResponse(response))
+	if encoded != expected {
+		t.Errorf("unexpected output: %s\nexpecting:%s", encoded, expected)
+	}
+
+}