| 摘要 |
Method, system and storage medium encoding a computer program for synchronizing a first user session and a second user session in a client-server system. The first user session is between a first Web service and a client and the second user session is between a second Web service and the same client. A request is received with a first session value by the second Web service. an indicator of the first session value is assigned to a shadow, and the shadow is sent in a response to the client. A subsequent request with the shadow and a subsequent session value is received from the client. The indicator is used to verify the subsequent session value at the second Web service. The second user session is terminated if the indicator in the shadow does not correspond to the subsequent session value.
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