Printing apparatus to acquire print data and transmits a request to an external apparatus to close websocket communication when predetermined time period elapsed

A data management method performed by a server apparatus, the data management method comprise:

• acquiring first print data and second print data;
• establishing a first websocket channel with a first apparatus and transmitting the first print data matched to the first apparatus to the first apparatus through the first websocket channel in response to a requesting of print data from the first apparatus;
• and
• establishing a second websocket channel with a second apparatus and transmitting the second print data matched to the second apparatus to the second apparatus through the second websocket channel in response to a requesting of print data from the second apparatus;
• wherein the data management method further comprises controlling a channel duration time of a websocket channel with an apparatus requesting the print data out of the first apparatus and the second apparatus when the print data is requested from at least one of the first apparatus and the second apparatus, and
• wherein the controlling a channel duration time of a websocket channel further comprises:
• when the print data is requested from at least one of the first apparatus and the second apparatus and the number of times the print data is requested exceeds a reference number, closing a websocket channel established with corresponding apparatus.