32. A non-transitory computer readable storage medium as defined in claim 31 , wherein the input interface sends a request to the message service to prompt the message service to generate the size information.
32. A non-transitory computer readable storage medium as defined in claim 31 , wherein the input interface sends a request to the message service to prompt the message service to generate the size information. 33. A non-transitory computer readable storage medium as defined in claim 32 , wherein the input interface sends the request to the message service periodically.