Resource subscription method, device, and storage medium

A subscription device, comprising:

• a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory to:
• control an input interface to receive a resource update message transmitted by a resource collection device, wherein the resource update message comprises updated content of a target resource subscribed and a first tag of the target resource, and the first tag is a current tag of the target resource stored on the resource collection device;
• determine whether a version of the target resource is missing according to the first tag, a second tag of the target resource stored locally, and a generation rule of tags, wherein tags generated according to the generation rule have an association relationship, the generation rule of tags used by the subscription device and a generation rule of tags used by the resource collection device are the same, and the second tag is a current tag of the target resource stored on the subscription device;
• in case that no version of the target resource is missing, update the second tag according to the resource update message;
• in case that the version of the target resource is missing,
• control an output interface to transmit a second request to the resource collection device, wherein the second request is used to confirm whether a missing version of the target resource is stored on the resource collection device, and the second request comprises the tag of the missing version of the target resource;
• and
• control the input interface to:
• receive a response to the second request from the resource collection device, wherein the response to the second request is used to notify whether the missing version of the target resource is stored on the resource collection device;
• and acquire a missing version of the target resource from the resource collection device and update the second tag according to the resource update message, in case that the missing version of the target resource is determined to be stored on the resource collection device according to the response to the second request.