tag parsing decode url encoded

fix https://github.com/seaweedfs/seaweedfs/issues/7040

test/s3/basic/object_tagging_test.go

@@ -2,9 +2,10 @@ package basic
 
 import (
 	"fmt"
+	"testing"
+
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/s3"
-	"testing"
 )
 
 func TestObjectTagging(t *testing.T) {
@@ -80,3 +81,69 @@ func clearTags() {
 
 	fmt.Println(response.String())
 }
+
+func TestObjectTaggingWithEncodedValues(t *testing.T) {
+	// Test for URL encoded tag values
+	input := &s3.PutObjectInput{
+		Bucket: aws.String("theBucket"),
+		Key:    aws.String("testDir/testObjectWithEncodedTags"),
+	}
+
+	svc.PutObject(input)
+
+	// Set tags with encoded values (simulating what would happen with timestamps containing spaces and colons)
+	_, err := svc.PutObjectTagging(&s3.PutObjectTaggingInput{
+		Bucket: aws.String("theBucket"),
+		Key:    aws.String("testDir/testObjectWithEncodedTags"),
+		Tagging: &s3.Tagging{
+			TagSet: []*s3.Tag{
+				{
+					Key:   aws.String("Timestamp"),
+					Value: aws.String("2025-07-16 14:40:39"), // This would be URL encoded as "2025-07-16%2014%3A40%3A39" in the header
+				},
+				{
+					Key:   aws.String("Path"),
+					Value: aws.String("/tmp/file.txt"), // This would be URL encoded as "/tmp%2Ffile.txt" in the header
+				},
+			},
+		},
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to set tags with encoded values: %v", err)
+	}
+
+	// Get tags back and verify they are properly decoded
+	response, err := svc.GetObjectTagging(&s3.GetObjectTaggingInput{
+		Bucket: aws.String("theBucket"),
+		Key:    aws.String("testDir/testObjectWithEncodedTags"),
+	})
+
+	if err != nil {
+		t.Fatalf("Failed to get tags: %v", err)
+	}
+
+	// Verify that the tags are properly decoded
+	tagMap := make(map[string]string)
+	for _, tag := range response.TagSet {
+		tagMap[*tag.Key] = *tag.Value
+	}
+
+	expectedTimestamp := "2025-07-16 14:40:39"
+	if tagMap["Timestamp"] != expectedTimestamp {
+		t.Errorf("Expected Timestamp tag to be '%s', got '%s'", expectedTimestamp, tagMap["Timestamp"])
+	}
+
+	expectedPath := "/tmp/file.txt"
+	if tagMap["Path"] != expectedPath {
+		t.Errorf("Expected Path tag to be '%s', got '%s'", expectedPath, tagMap["Path"])
+	}
+
+	fmt.Printf("✓ URL encoded tags test passed - Timestamp: %s, Path: %s\n", tagMap["Timestamp"], tagMap["Path"])
+
+	// Clean up
+	svc.DeleteObjectTagging(&s3.DeleteObjectTaggingInput{
+		Bucket: aws.String("theBucket"),
+		Key:    aws.String("testDir/testObjectWithEncodedTags"),
+	})
+}