save image to uuid name

scripts/wx_upload_single.lua

@@ -3,6 +3,7 @@
 package.path = package.path .. ';<SCRIPT_PATH>/?.lua';
 
 local cjson = require "cjson"
+local uuid = require "resty.jit-uuid"
 local upyun_upload = require("upyun_upload")
 local get_wx_media = require("wx_download")
 
@@ -20,7 +21,7 @@ local function run()
 
     local downloaded_file = get_wx_media(req_body["media_id"]);
 
-    upyun_upload.upload(downloaded_file)
+    upyun_upload.upload(downloaded_file, uuid.generate_v4() .. ".jpg")
 end
 
 run();