code: def get_url(path="", model="", **kwargs):
      server_url = get_server_url() + "/url/"
      data = json.dumps({"path": path, "model": model})
      headers = {"Content-Type": "application/json"}
      res = requests.post(
          url=server_url, headers=headers, data=data
      ).json()
      err_code = res.get("code")
      msg = res.get("msg")
  
      if "000000" == err_code:
          url = msg.get("url")
          return url
      else:
          logger.error(msg)
          return
  
file_path: VisualDL/visualdl/server/serve.py
imports: import requests
  import json
  import os
  from visualdl.io import bfile
  from visualdl.reader.reader import is_VDLRecord_file
  from visualdl.utils.dir import CONFIG_PATH
  from visualdl.server.log import logger
label_desc: Use image node_id 3 for calling a global function with example usage: get_url(path, model) and returns: url