Communication method, communication device, and recording medium for streaming

A communication device comprising:

• a first obtaining unit that obtains data by using a first line;
• a second obtaining unit that obtains data by using a second line;
• a reproducing unit that conducts streaming reproduction of the data to be obtained by a first obtaining task executed by at least one of the first obtaining unit and the second obtaining unit;
• an issuing unit that
• divides the data to be obtained into a plurality of second obtaining tasks when data at a reproduction position for the streaming reproduction is unobtained, a size of data to be obtained by each of the plurality of second obtaining tasks being smaller than a size of the data to be obtained by the first obtaining task,
• issues the plurality of second obtaining tasks using at least one of the first obtaining unit and the second obtaining unit, and
• issues a task of executing obtainment of head data of the data to be obtained to the first obtaining unit and the second obtaining unit, when obtainment of the data to be obtained is started;
• a judging unit that judges whether or not a line that completed the obtainment is the first line when the obtainment of the head data has been completed;
• and
• a determining unit that determines the first line to be the main line when the first obtaining unit completed the obtainment, and determines the second line to be the main line when the first obtaining unit did not complete the obtainment.

A non-transitory computer-readable recording medium having stored therein a communication program that causes a communication device to execute a process comprising:

• obtaining data by using one selected from a first line and a second line;
• conducting streaming reproduction of the obtained data;
• and
• dividing the first obtaining task into a plurality of second obtaining tasks when data at a reproduction position for the streaming reproduction is unobtained, a size of data to be obtained by each of the plurality of second obtaining tasks being smaller than a size of data to be obtained by the first obtaining task;
• issuing the plurality of second obtaining tasks using at least one of the first line and the second line;
• issuing a task of executing obtainment of head data of the data to be obtained to the first line and the second line, when obtainment of the data to be obtained is started;
• judging whether or not a line that completed the obtainment is the first line when the obtainment of the head data has been completed;
• determining the first line to be the main line when the line that completed the obtainment is the first line;
• and
• determining the second line to be the main line when the line that completed the obtainment is not the first line.