code: def _retrieve_request(conn):
      """
      MSG Frame Format:
  
      | request_id |
      | request_headers: list of request headers|
      | parameters: list of request parameters |
      """
      length = _retrieve_int(conn)
      if length == -1:
          return None
  
      request = {}
      request["requestId"] = _retrieve_buffer(conn, length)
  
      headers = []
      while True:
          header = _retrieve_reqest_header(conn)
          if header is None:
              break
          headers.append(header)
  
      request["headers"] = headers
  
      model_inputs = []
      while True:
          input_data = _retrieve_input_data(conn)
          if input_data is None:
              break
          model_inputs.append(input_data)
  
      request["parameters"] = model_inputs
      return request
  
imports: import io
  import json
  import logging
  import os
  import struct
  import sys
  import time
  from builtins import bytearray, bytes
  import torch
  from ts.utils.util import deprecated
label_desc: Use image node_id 10 for calling a global function with example usage: _retrieve_request(conn) and returns: request, None