Data processing: measuring – calibrating – or testing – Measurement system – History logging or time stamping
Reexamination Certificate
1998-10-21
2001-06-05
Shah, Kamini (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
History logging or time stamping
C706S047000, C706S050000, C345S215000
Reexamination Certificate
active
06243662
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a data relay device, information terminal equipment, a computer-readable recording medium storing a data relay program, and a computer-readable recording medium storing an information browsing program, and more particularly to a data relay device storing relayed data as history information, information terminal equipment for gaining access to history information of such a data relay device, a computer-readable recording medium storing a data relay program for storing relayed data as history information, and a computer-readable recording medium storing an information browsing program for gaining access to a data relay device storing history information.
2. Description of the Prior Art
Recently, the exchange of information by use of WWW (World Wide Web) on the Internet is increasing. Use of WWW provides users with the ability to gain easy access to information in the world.
A user browses page data on WWW servers using client software (hereinafter, simply referred to as a client) called a browser. To gain access to information on WWW, an identifier called URL (Uniform Resource Locator) indicating a data position is inputted to the browser. A request to the URL is sent from the browser to the WWW server and data corresponding to the URL is returned. The data is displayed on the browser and the user can browse the data.
Although users browse data on WWW in this way, since information on WWW is always changing, the same contents cannot always be browsed by the same URL. Data contents are updated several times a day in the home pages of most newspaper publishing companies, for example. Accordingly, to rebrowse browsed data later requires that users store the data by some method. For example, if information about desirable data is stored in a computer in which a client is executed, even if the contents of the data within a WWW server have been updated, the pre-update data would be able to be browsed.
However, if data browsed previously is stored in individual computers in which clients are executed, the data cannot be accessed from a plurality of clients. If data browsed previously is stored as history information which can be accessed from a plurality of computers, users are very conveniently accessible to the history information even if the computers they use change. Accordingly, it is conceivable that data relayed is automatically stored as history information in a device (data relay device) for relaying data such as a proxy server so that the history information can be accessed from computers on the network.
However, a WWW page often contains images, which each are specified by a URL different from that of the page. Accordingly, the images are stored in a data relay device as different history information. In the case of rebrowsing such a page consisting of a plurality of pieces of data, a previous browsing state cannot be correctly reproduced without accessing correct pairs of basic data and image data contained in the basic data.
SUMMARY OF THE INVENTION
The present invention has been made in consideration of such a point and its object is to provide a data relay device which enables information consisting of a plurality of pieces of data to be reproduced in the same state that it was browsed previously.
Another object of the present invention is to provide information terminal equipment that can rebrowse information consisting of a plurality of pieces of data in the same state that it was browsed previously.
A further object of the present invention is to provide a computer-readable recording medium storing a data relay program for instructing a computer to perform processing so that information consisting of a plurality of pieces of data can be reproduced in the same state that it was browsed previously.
Still another object of the present invention is to provide a computer-readable recording medium storing an information browsing program for instructing a computer to perform processing so that information consisting of a plurality of pieces of data can be rebrowsed in the same state that it was browsed previously.
To solve the above-mentioned problem, the present invention provides a data relay device relaying data between a data use unit that uses data, and a data supply unit that supplies stored data, the data relay device comprising: a history memory that stores history information of relayed data; a request analysis unit that receives a data acquisition request from the data use unit, analyzes whether it is a data relay request or a history information acquisition request, and extracts a data name from the data acquisition request when the data acquisition request is a data relay request, while extracting a data name, time, and a search method from the data acquisition request when the data acquisition request is a history information acquisition request; a data request unit that, when the data acquisition request is a data relay request, requests data corresponding to the data name extracted by the request analysis unit from the data supply unit and receives data sent from the data supply unit in response to the request; and a history management unit that, when the data acquisition request is a data relay request, associatively stores the data received by the data request unit, the name of the data, and time when data relay processing was performed, in the history memory as history information, and outputs the data received by the data request unit, while, when the data acquisition request is a history information acquisition request, using the data name and time extracted by the request analysis unit to search the history memory for appropriate history information by the search method extracted by the request analysis unit and outputting data contained in the detected history information.
According to such a data relay device, when a data acquisition request is inputted to acquire history information, a data name, time, and a search method are extracted by the request analysis unit. The history management unit uses the data name and time extracted by the request analysis unit to search the history memory for appropriate history information by the search method extracted by the request analysis unit and outputs it to the data use unit.
With this arrangement, when a data acquisition request is outputted from the data use unit to acquire history information, if a proper search method is specified, appropriate history information can be accessed even if correct time is unknown.
Also, to solve the above-mentioned problem, there is provided information terminal equipment that relays data to and from a server and accesses data on the server connected through a network via a data relay device, which associatively manages relayed data, a data name, and time as management information and sends back data contained in appropriate history information in response to a data acquisition request containing a data name, time, and a search method, the information terminal equipment comprising: a request unit that outputs a data acquisition request specifying a data name to the data relay device when accessing the most recent data on the server, and outputs a data acquisition request specifying a data name, time, and a search method when accessing data in history information stored in the data relay device; a data acceptance unit that receives data sent from the data relay device in response to the data acquisition request; and a display device that displays data received by the data acceptance unit on the screen of a display device.
According to such information terminal equipment, when data in history information stored in the data relay device is accessed, a data acquisition request specifying a data name, time, and a search method is outputted by the request unit. Accordingly, a history information acquisition request specifying the search method can be outputted to the data relay device of the present invention.
Also, to solve the above-mentioned problem, there is provided a computer-readable reco
Fuji 'Xerox Co., Ltd.
Oliff & Berridg,e PLC
Shah Kamini
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