feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

backend/infra/impl/document/parser/builtin/image.go

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package builtin
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/coze-dev/coze-studio/backend/infra/contract/storage"
+)
+
+func putImageObject(ctx context.Context, st storage.Storage, imgExt string, uid int64, img []byte) (format string, err error) {
+	secret := createSecret(uid, imgExt)
+	fileName := fmt.Sprintf("%d_%d_%s.%s", uid, time.Now().UnixNano(), secret, imgExt)
+	objectName := fmt.Sprintf("%s/%s", knowledgePrefix, fileName)
+	if err := st.PutObject(ctx, objectName, img); err != nil {
+		return "", err
+	}
+	imgSrc := fmt.Sprintf(imgSrcFormat, objectName)
+	return imgSrc, nil
+}