Data receiving apparatus capable of writing only necessary data

Details Data receiving apparatus capable of writing only necessary data Data receiving apparatus capable of writing only necessary data

1997-05-28

2000-04-25

Gossage, Glenn

Electrical computers and digital processing systems: memory

Storage accessing and control

711154, 370474, G06F 1300, H04J 324, H04L 1256

Patent

active

060556013

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a data receiving apparatus which stores data, received via a communication network or the like, into a file.


BACKGROUND ART

There is a conventional communication system which uses an information processing apparatus, such as a word processor or a personal computer, connected via a modem or the like to a telephone line or which has such information processing apparatuses serially connected together using RS-232C (as defined by the Electronic Industries Alliance) or the like. Such a system stores data of a string of characters (hereinafter called "character string data") that has been received through communication in a file in an external storage section that comprises, for example, a floppy disk drive (FDD) in order to record the received data. In the case where an information processing apparatus is connected to a BBS (Bulletin Board System) to receive (or download) necessary information, all the data from the declaration of the beginning of reception until the declaration of the end of the reception is written in a file in an FDD or the like. That is, a text including menus and messages and control data as well as the necessary character string data which is to be received from the host side are written in a file.
As such, unnecessary text and control data or the like besides the necessary character string data are written in a file at the time of reception, and the conventional data receiving apparatus needs a large file and thus suffers from ineffective use of its memory.
In order to receive only needed information and thereby prevent the file size from increasing, it is necessary to finely instruct the declaration of the beginning of reception and the declaration of the end of the reception. Such an instruction is likely to result in an erroneous operation and involves a tiresome operation.


DISCLOSURE OF INVENTION

Accordingly, it is an object of the present invention to provide a data receiving apparatus capable of writing only necessary data in a file at the time of writing received data in the file.
To achieve the above object, according to the first aspect of this invention, there is provided a data receiving apparatus for receiving data via a communication network or the like and storing the data, which comprises: information indicating a start of data extraction and end information indicating a termination of the data extraction; detecting a first data coincidence of the data received via the communication network with said start information and a second data coincidence of the data received via the communication network with said end information, and for extracting from therebetween necessary data from the data received via the communication network; and forming a file including said necessary data extracted by said extracting means.
According to the second aspect of this invention, there is provided a data receiving apparatus for receiving data via a communication network or the like and storing the data, which comprises: information indicating a start of data extraction and end information indicating a termination of the data extraction; a first data coincidence of the data received via the communication network with said start information and a second data coincidence of the data received via the communication network with said end information; and for, when said detection means detects the first data coincidence, opening a file and writing into said file portions of the data received via the communication network which follow said first data coincidence, and for, when said detection means detects the second data coincidence, terminating the writing of data into said file.
According to the first and second aspects of the present invention, only necessary data need be written in a file. Therefore, the size of the file does not have to be increased. Further, the operation of the apparatus is simplified.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block structural diagram illustrating the essential portions of a personal computer according

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Tanenbaum, Andrew S; Computer Networks; 1988; second edition; Prentice-Hall Int'l., Englewood Cliffs, New Jersey, U.S.A., pp. 1-27.

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