Relay apparatus, system, relay method, and computer readable medium

摘要

A relay apparatus includes a storage unit, a first reception unit, a first request unit, a second reception unit, a second request unit, a third reception unit, and an access unit. The storage unit stores, for each user, authorization information for accessing a service providing apparatus. The first reception unit receives from a client apparatus an access request including a request for access to the service providing apparatus and identification information for identifying the user. The first request unit issues an acquisition request for the authorization information to a different relay apparatus. The second reception unit receives authorization information transmitted from the different relay apparatus. The second request unit requests the different relay apparatus to update the received authorization information. The third reception unit receives updated authorization information transmitted from the different relay apparatus. The access unit accesses the service providing apparatus by using the received updated authorization information.

主权项

1. A relay apparatus comprising:
at least one hardware processor configured to execute modules comprising: a storage configured to store, for each user, authorization information for accessing a service providing apparatus; a first receiver configured to receive from a client apparatus an access request including a request for access to the service providing apparatus and identification information for identifying the user; a first requestor configured to issue, when authorization information generated by the service providing apparatus and corresponding to the identification information included in the received access request is not stored in the storage, an acquisition request for the authorization information to a different relay apparatus; a second receiver configured to receive authorization information generated by the service providing apparatus and transmitted from the different relay apparatus as a response to the acquisition request; a second requestor configured to request, when at least any one of the received authorization information and the received access request satisfies a predetermined condition, the different relay apparatus to update the received authorization information; a third receiver configured to receive updated authorization information generated by the service providing apparatus and transmitted from the different relay apparatus as a response to the update request; and an accessor configured to access the service providing apparatus by using the received updated authorization information.