Content transmission apparatus, content reception apparatus, and content upload method

A content reception apparatus comprising:

• a first store module configured to store, in a storage device, metadata notified from a content transmission apparatus via a network;
• a generating module configured to generate, on the basis of the notified metadata, an entry point indicating a place where a content item corresponding to the metadata is stored in the storage device, and notifies the content transmission apparatus of the entry point via the network;
• a reception module which receives a content item encoded as a body of an upload request from the content transmission apparatus via the network;
• a second storing module configured to store the got content item in a place corresponding to the entry point;
• and
• an update module configured to update metadata stored in the storage device by using the posterior metadata when receiving posterior metadata which is transmitted from the content transmission apparatus and contains at least a changed item in metadata stored in the storage device.

A content upload method comprising:

• causing a content transmission apparatus to receive a content item and metadata for explaining content information of the content item;
• causing the content transmission apparatus to notify a content reception apparatus for the content of the metadata;
• causing the content reception apparatus to store, in a storage device, the metadata notified from the content transmission apparatus;
• causing the content reception apparatus to create, on the basis of the notified metadata, an entry point indicating a place where a content item corresponding to the metadata is stored;
• causing the content reception apparatus to notify the content transmission apparatus of the entry point;
• causing the content transmission apparatus to encode the content and transmit the encoded content as a body of an upload request to an entry point created by the content reception apparatus on the basis of the metadata;
• causing the content reception apparatus to receive a chunked-encoded content as a body of an upload request based on an HTTP POST request from the content transmission apparatus and store the content in a place corresponding to the entry point;
• causing the content transmission apparatus to detect a change in metadata notified to the content reception apparatus relative to newly got metadata;
• causing the content transmission apparatus to notify the content reception apparatus of posterior metadata containing at least a changed item in metadata when detecting a change in metadata;
• and
• causing the content transmission apparatus to update metadata in the storage device by using the posterior metadata.