Abstract: A computing system runs a productivity application that maintains an integrated, time ordered revision/undo stack. Entries in the revision/undo stack identify revision operations that a user has made to a document and corresponding undo operations that can be executed to undo the revision operation. The computing system detects an undo input indicative of a user actuating un undo actuator to undo a previous operation, that is prior to a most current operation that the user has performed. An operational transform system identifies an undo operation in the undo stack, corresponding to the revision that the user selected in the revision/undo stack. The operational transform system traverses the revision/undo stack to identify subsequent operations that were performed subsequent to the previous operation, and identifies one or more transforms to be applied to the undo operation based upon the identified subsequent operations.

Abstract: Methods and computer-readable media are provided for refreshing a page validation token. In response to a request for a form from a client, a server responds with the requested form, a page validation token, and a page token refresh program. The client executes the page token refresh program in response to a request to post the contents of the form to the server computer. The page token refresh program determines whether a preset period of time has elapsed since server computer generated the page validation token. If the period of time has not elapsed, the form is posted to the server with the page validation token and processed by the server computer. If the page timeout has elapsed, the page token refresh program refreshes the page validation token prior to posting the form by requesting an updated page validation token from the server.

Abstract: A feedback loop is created between a server and clients that provides the clients with health information of the server to assist in client-server traffic control. Health information is calculated for the server that measures a current health of the server. The health information is automatically provided to a client by the server in response to a request made by the client. The clients can utilize the received health information to determine when to request resources from the server.

Abstract: Methods and computer-readable media are provided for refreshing a page validation token. In response to a request for a form from a client, a server responds with the requested form, a page validation token, and a page token refresh program. The client executes the page token refresh program in response to a request to post the contents of the form to the server computer. The page token refresh program determines whether a preset period of time has elapsed since server computer generated the page validation token. If the period of time has not elapsed, the form is posted to the server with the page validation token and processed by the server computer. If the page timeout has elapsed, the page token refresh program refreshes the page validation token prior to posting the form by requesting an updated page validation token from the server.