Systems and methods for incremental loading of collaboratively generated presentations

摘要

Systems and methods for incrementally communicating a document to a client computer are disclosed herein. Time consistent views of the document are maintained throughout the incremental downloading through use of a cryptographically secured permissions token identifying a version of the document the user is permitted to access.

主权项

1. A method of incrementally providing a document to a client system, the method comprising:
transmitting, from a server to the client system, a first portion of a first version of the document in response to receiving a request from the client system to receive the first portion; receiving, at the server after the first portion is transmitted, a change to the first version of the document; storing, at the server, an unedited first version of the document; generating, by the server a cryptographic value based on an identifier of at least one version of the document from which the client system is authorized to obtain additional portions beyond the first portion; transmitting the cryptographic value to the client system in response to the request; and transmitting, from the server to the client system, a second portion of the unedited first version of the document to the client system after determining that the client system is authorized to receive the second portion.