INSTANT MESSAGING SYSTEM, COMPONENT AND METHOD FOR ADDITIONAL SERVICE

摘要

An IM system for an additional service includes: an IM client and at least one IM component adapted to support at least one additional service, between which a common interface is configured. The IM client triggers the at least one IM component via the common interface when a local IM user logs on; and the at least one IM component obtains an identity of at least one IM user other than the local IM user via the common interface, and query, according to the identity, whether the at least one IM user subscribes to one of the at least one additional service supported by the at least one IM component. A component and method for an additional service are also provided. By utilizing the IM system, component and method, extensibility of the IM system can be improved, and costs for extending the IM system can be reduced.