fix: Fixed CopySource parsing to handle the values starting with '/' in CopyObject action in posix and azure backends.

backend/azure/azure.go

@@ -744,7 +744,12 @@ func (az *Azure) CopyObject(ctx context.Context, input *s3.CopyObjectInput) (*s3
 		return nil, azureErrToS3Err(err)
 	}
 
-	if strings.Join([]string{*input.Bucket, *input.Key}, "/") == *input.CopySource && isMetaSame(res.Metadata, input.Metadata) {
+	cpSrc := *input.CopySource
+	if cpSrc[0] == '/' {
+		cpSrc = cpSrc[1:]
+	}
+
+	if strings.Join([]string{*input.Bucket, *input.Key}, "/") == cpSrc && isMetaSame(res.Metadata, input.Metadata) {
 		return nil, s3err.GetAPIError(s3err.ErrInvalidCopyDest)
 	}
 
@@ -758,7 +763,7 @@ func (az *Azure) CopyObject(ctx context.Context, input *s3.CopyObjectInput) (*s3
 		return nil, err
 	}
 
-	resp, err := client.CopyFromURL(ctx, az.serviceURL+"/"+*input.CopySource, &blob.CopyFromURLOptions{
+	resp, err := client.CopyFromURL(ctx, az.serviceURL+"/"+cpSrc, &blob.CopyFromURLOptions{
 		BlobTags: tags,
 		Metadata: parseMetadata(input.Metadata),
 	})

backend/posix/posix.go

@@ -1938,7 +1938,13 @@ func (p *Posix) CopyObject(ctx context.Context, input *s3.CopyObjectInput) (*s3.
 	if input.ExpectedBucketOwner == nil {
 		return nil, s3err.GetAPIError(s3err.ErrInvalidRequest)
 	}
-	srcBucket, srcObject, ok := strings.Cut(*input.CopySource, "/")
+
+	cpSrc := *input.CopySource
+	if cpSrc[0] == '/' {
+		cpSrc = cpSrc[1:]
+	}
+
+	srcBucket, srcObject, ok := strings.Cut(cpSrc, "/")
 	if !ok {
 		return nil, s3err.GetAPIError(s3err.ErrInvalidCopySource)
 	}

tests/integration/group-tests.go

@@ -197,6 +197,7 @@ func TestCopyObject(s *S3Conf) {
 	CopyObject_not_owned_source_bucket(s)
 	CopyObject_copy_to_itself(s)
 	CopyObject_to_itself_with_new_metadata(s)
+	CopyObject_CopySource_starting_with_slash(s)
 	CopyObject_success(s)
 }
 
@@ -609,6 +610,7 @@ func GetIntTests() IntTests {
 		"CopyObject_not_owned_source_bucket":                                  CopyObject_not_owned_source_bucket,
 		"CopyObject_copy_to_itself":                                           CopyObject_copy_to_itself,
 		"CopyObject_to_itself_with_new_metadata":                              CopyObject_to_itself_with_new_metadata,
+		"CopyObject_CopySource_starting_with_slash":                           CopyObject_CopySource_starting_with_slash,
 		"CopyObject_success":                                                  CopyObject_success,
 		"PutObjectTagging_non_existing_object":                                PutObjectTagging_non_existing_object,
 		"PutObjectTagging_long_tags":                                          PutObjectTagging_long_tags,

tests/integration/tests.go

@@ -4215,6 +4215,66 @@ func CopyObject_to_itself_with_new_metadata(s *S3Conf) error {
 	})
 }
 
+func CopyObject_CopySource_starting_with_slash(s *S3Conf) error {
+	testName := "CopyObject_CopySource_starting_with_slash"
+	return actionHandler(s, testName, func(s3client *s3.Client, bucket string) error {
+		dataLength, obj := int64(1234567), "src-obj"
+		dstBucket := getBucketName()
+		if err := setup(s, dstBucket); err != nil {
+			return err
+		}
+
+		csum, _, err := putObjectWithData(dataLength, &s3.PutObjectInput{
+			Bucket: &bucket,
+			Key:    &obj,
+		}, s3client)
+		if err != nil {
+			return err
+		}
+
+		ctx, cancel := context.WithTimeout(context.Background(), shortTimeout)
+		_, err = s3client.CopyObject(ctx, &s3.CopyObjectInput{
+			Bucket:     &dstBucket,
+			Key:        &obj,
+			CopySource: getPtr(fmt.Sprintf("/%v/%v", bucket, obj)),
+		})
+		cancel()
+		if err != nil {
+			return err
+		}
+
+		ctx, cancel = context.WithTimeout(context.Background(), shortTimeout)
+		out, err := s3client.GetObject(ctx, &s3.GetObjectInput{
+			Bucket: &dstBucket,
+			Key:    &obj,
+		})
+		defer cancel()
+		if err != nil {
+			return err
+		}
+		if *out.ContentLength != dataLength {
+			return fmt.Errorf("expected content-length %v, instead got %v", dataLength, out.ContentLength)
+		}
+
+		defer out.Body.Close()
+
+		bdy, err := io.ReadAll(out.Body)
+		if err != nil {
+			return err
+		}
+		outCsum := sha256.Sum256(bdy)
+		if outCsum != csum {
+			return fmt.Errorf("invalid object data")
+		}
+
+		if err := teardown(s, dstBucket); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
 func CopyObject_success(s *S3Conf) error {
 	testName := "CopyObject_success"
 	return actionHandler(s, testName, func(s3client *s3.Client, bucket string) error {