Information processing system, information processing method, and information processing program

An information processing method to be executed by computer, the method comprising:

• a reception step of receiving a request transmitted from a terminal device of a user, the request being transmitted in response to an operation by the user on predetermined transaction object reference information carried by an information carrying medium other than a first web page for purchase of a predetermined transaction object, the predetermined transaction object reference information indicating a reference to the first web page;
• an acquisition step of acquiring, in response to the request being received in the reception step, purchase availability information indicating whether purchase of the predetermined transaction object is available;
• a first transmission step of transmitting location information indicating a location of the first web page to the terminal device in response to the acquired purchase availability information indicating that the purchase of the predetermined transaction object is available;
• an identification step of identifying a substitute transaction object as a substitute for the predetermined transaction object in response to the acquired purchase availability information indicating that the purchase of the predetermined transaction object is not available;
• and
• a second transmission step of transmitting a substitute web page carrying substitute transaction object reference information indicating a reference to a second web page for purchase of the identified substitute transaction object.

A non-transitory computer readable medium storing thereon an information processing program causing a computer to:

• receive a request transmitted from a terminal device of a user, the request being transmitted in response to an operation by the user on predetermined transaction object reference information carried by an information carrying medium other than a first web page for purchase of a predetermined transaction object, the predetermined transaction object reference information indicating a reference to the first web page;
• acquire, in response to the request being received, purchase availability information indicating whether purchase of the predetermined transaction object is available;
• transmit location information indicating a location of the first web page to the terminal device in response to the acquired purchase availability information indicating that the purchase of the predetermined transaction object is available;
• identify a substitute transaction object as a substitute for the predetermined transaction object in response to the acquired purchase availability information indicating that the purchase of the predetermined transaction object is not available;
• and
• transmit a substitute web page carrying substitute transaction object reference information indicating a reference to a second web page for purchase of the identified substitute transaction object.