Terminal, message distribution system, message distribution method, and computer-readable medium

A message distribution system comprising:

• a terminal;
• and
• a push server which performs push-type message distribution to the terminal,
• wherein the terminal comprises a processor configured to:
• detect a type of a network connecting the terminal to the push server;
• determine, based on a result of the detection, whether the terminal and the push server are located in a same IP address spaced;
• select, if the terminal and the push server are not located in the same IP address space, a first communication method utilizing a pre-established TCP session;
• select, if the terminal and the push server are located in the same IP address space, a second communication method establishing a TCP session between the terminal and the push server by the push server when a message is distributed;
• and
• receive a message from the push server according to the selected communication method,
• wherein the push server is further configured to perform message distribution according to a communication-method selection result notified from the terminal.

A message distribution method comprising:

• detecting by a terminal a type of a network connecting the terminal to a push server which performs message distribution;
• determining, based on a result of the detection, whether the terminal and the push server are located in a same IP address space;
• selecting, if the terminal and the push server are not located in the same IP address space, a first communication method utilizing a pre-established TCP session;
• selecting, if the terminal and the push server are located in the same IP address space, a second communication method establishing a TCP session between the terminal and the push server by the push server when a message is distributed;
• and
• performing message distribution by the push server according to a communication-method selection result notified from the terminal.

A non-transitory computer-readable medium that stores therein a message reception program for causing a computer, which is mounted in a terminal, to be capable of communicating with a push server that executes push-type message distribution processes, the program causing the computer to:

• detect a type of a network connecting the terminal to the push server;
• determine, based on a result of the detection, whether the terminal and the push server are located in a same IP address space;
• select, if the terminal and the push server are not located in the same IP address space, a first communication method utilizing a pre-established TCP session;
• and
• select, if the terminal and the push server are located in the same IP address space, a second communication method establishing a TCP session between the terminal and the push server by the push server when a message is distributed;
• and
• receive a message from the push server according to the selected communication method.