code: def extract_file_name(content_dispo):
      
      # print type(content_dispo)
      # print repr(content_dispo)
      # convertion of escape string (str type) from server
      # to unicode object
      content_dispo = content_dispo.decode('unicode-escape').strip('"')
      file_name = ""
      for key_val in content_dispo.split(';'):
          param = key_val.strip().split('=')
          if param[0] == "filename":
              file_name = param[1].strip('"')
              break
      return file_name
docs: Extract file name from the input request body