diff --git a/common/rpc-service.c b/common/rpc-service.c
index 239f2be6..05f9957e 100644
--- a/common/rpc-service.c
+++ b/common/rpc-service.c
@@ -2744,6 +2744,7 @@ seafile_del_file (const char *repo_id, const char *parent_dir,
 {
     char *norm_parent_dir = NULL, *norm_file_name = NULL, *rpath = NULL;
     int ret = 0;
+    json_t *array = NULL;
 
     if (!repo_id || !parent_dir || !file_name || !user) {
         g_set_error (error, 0, SEAF_ERR_BAD_ARGS, "Argument should not be null");
@@ -2771,6 +2772,21 @@ seafile_del_file (const char *repo_id, const char *parent_dir,
         goto out;
     }
 
+    array = json_loadb (norm_file_name, strlen(norm_file_name), 0, NULL);
+    if (!array) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        ret = -1;
+        goto out;
+    }
+    size_t n = json_array_size (array);
+    if (n <= 0) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        ret = -1;
+        goto out;
+    }
+
     rpath = format_dir_path (norm_parent_dir);
 
     if (seaf_repo_manager_del_file (seaf->repo_mgr, repo_id,
@@ -2780,6 +2796,8 @@ seafile_del_file (const char *repo_id, const char *parent_dir,
     }
 
 out:
+    if (array)
+        json_decref (array);
     g_free (norm_parent_dir);
     g_free (norm_file_name);
     g_free (rpath);
@@ -2803,6 +2821,8 @@ seafile_copy_file (const char *src_repo_id,
     char *norm_dst_dir = NULL, *norm_dst_filename = NULL;
     char *rsrc_dir = NULL, *rdst_dir = NULL;
     GObject *ret = NULL;
+    json_t *src_array = NULL, *dst_array = NULL;
+    size_t n_src, n_dst;
 
     if (!src_repo_id || !src_dir || !src_filename ||
         !dst_repo_id || !dst_dir || !dst_filename || !user) {
@@ -2843,6 +2863,36 @@ seafile_copy_file (const char *src_repo_id,
         goto out;
     }
 
+    src_array = json_loadb (norm_src_filename, strlen(norm_src_filename), 0, NULL);
+    if (!src_array) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    n_src = json_array_size (src_array);
+    if (n_src <= 0) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    dst_array = json_loadb (norm_dst_filename, strlen(norm_dst_filename), 0, NULL);
+    if (!dst_array) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    n_dst = json_array_size (dst_array);
+    if (n_dst <= 0) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    if (n_src != n_dst) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "The number of files in the parameters does not match");
+        goto out;
+    }
+
     rsrc_dir = format_dir_path (norm_src_dir);
     rdst_dir = format_dir_path (norm_dst_dir);
 
@@ -2853,6 +2903,10 @@ seafile_copy_file (const char *src_repo_id,
                                                             error);
 
 out:
+    if (src_array)
+        json_decref (src_array);
+    if (dst_array)
+        json_decref (dst_array);
     g_free (norm_src_dir);
     g_free (norm_src_filename);
     g_free (norm_dst_dir);
@@ -2880,6 +2934,8 @@ seafile_move_file (const char *src_repo_id,
     char *norm_dst_dir = NULL, *norm_dst_filename = NULL;
     char *rsrc_dir = NULL, *rdst_dir = NULL;
     GObject *ret = NULL;
+    json_t *src_array = NULL, *dst_array = NULL;
+    size_t n_src, n_dst;
 
     if (!src_repo_id || !src_dir || !src_filename ||
         !dst_repo_id || !dst_dir || !dst_filename || !user) {
@@ -2920,6 +2976,36 @@ seafile_move_file (const char *src_repo_id,
         goto out;
     }
 
+    src_array = json_loadb (norm_src_filename, strlen(norm_src_filename), 0, NULL);
+    if (!src_array) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    n_src = json_array_size (src_array);
+    if (n_src <= 0) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    dst_array = json_loadb (norm_dst_filename, strlen(norm_dst_filename), 0, NULL);
+    if (!dst_array) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    n_dst = json_array_size (dst_array);
+    if (n_dst <= 0) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "Path is in valid json array");
+        goto out;
+    }
+    if (n_src != n_dst) {
+        g_set_error (error, SEAFILE_DOMAIN, SEAF_ERR_BAD_ARGS,
+                     "The number of files in the parameters does not match");
+        goto out;
+    }
+
     rsrc_dir = format_dir_path (norm_src_dir);
     rdst_dir = format_dir_path (norm_dst_dir);
 
@@ -2930,6 +3016,10 @@ seafile_move_file (const char *src_repo_id,
                                                             error);
 
 out:
+    if (src_array)
+        json_decref (src_array);
+    if (dst_array)
+        json_decref (dst_array);
     g_free (norm_src_dir);
     g_free (norm_src_filename);
     g_free (norm_dst_dir);
diff --git a/python/seaserv/api.py b/python/seaserv/api.py
index ece5270c..18db5551 100644
--- a/python/seaserv/api.py
+++ b/python/seaserv/api.py
@@ -296,14 +296,14 @@ def put_file(self, repo_id, tmp_file_path, parent_dir, filename,
 
     '''
     If you want to delete multiple files in a batch, @filename should be in
-    the following format: 'filename1\tfilename2\tfilename3'
+    the following format: '["filename1", "filename2", "filename3"]'
     '''
     def del_file(self, repo_id, parent_dir, filename, username):
         return seafserv_threaded_rpc.del_file(repo_id, parent_dir, filename, username)
 
     '''
     If you want to move or copy multiple files in a batch, @src_filename and @dst_filename
-    should be in the following format: 'filename1\tfilename2\tfilename3',make sure the number of files
+    should be in the following format: '["filename1", "filename2", "filename3"]',make sure the number of files
     in @src_filename and @dst_filename parameters match
     '''
     def copy_file(self, src_repo, src_dir, src_filename, dst_repo,