JP2002342151A - Www cache system and method for pre-reading www data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a WWW cache system capable of reducing network traffic. SOLUTION: A timer set reading means 21 reads a set time from a user set storing part 31 and starts the system at the time. A URL data retrieving means 22 compares URL data registered by a user with the existing URL data. A first cache data reading means 23 temporarily stores cache data of a URL data coinciding with the URL data registered by the user in a first cache data temporarily storing part 33 with respect to cache data. A second cache data reading means 24 receives the URL data registered by the user from a proxy server device and stores the URL data in a second cache data temporarily storing part 34. A cache data comparing means 25 discriminates update state of WWW data and transmits the discrimination results from a mail transmitting means 28 by e-mail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a WWW cache system and a WWW data prefetch method, and more particularly to a system using a prefetch means of a cache server.

[0002]

2. Description of the Related Art Conventionally, as a system using prefetch means of a cache server, a WWW (World Wide Wed) disclosed in Japanese Patent Application Laid-Open No. H11-149405 has been proposed.
b) There is a cache system.

In this system, a priority is given to WWW data cached in a cache server, and a condition of whether or not to perform a prefetch for each requested WWW data is set, so that a load on a network due to a prefetch of the WWW data is provided. While suppressing an increase in the number of caches, the cache recall rate is improved by pre-reading the WWW data.

[0004]

SUMMARY OF THE INVENTION The above-mentioned conventional WWW
In the method of prefetching data, a method of caching (prefetching) WWW data periodically or at a time when network traffic is small is performed. In this method, a user determines whether or not the cached information is the latest. It can only be determined by accessing.

[0005] For this reason, even if the information on the Web page is not updated to the latest, the user will access, and as a result, the traffic on the network cannot be reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a WWW cache system and a WWW data prefetching method which can solve the above-mentioned problems and can reduce network traffic.

[0007]

SUMMARY OF THE INVENTION A WWW cache system according to the present invention comprises a WWW (World Wide Wed).
b) a WWW cache system including a cache server device for prefetching and storing data, wherein the cache means caches WWW data of a Web page registered from the outside from the cache server device at a preset time; A determination unit is provided for determining whether the content of the WWW data has been updated, and a notification unit is provided for notifying the determination result by e-mail.

The WWW data prefetching method according to the present invention comprises:
A WWW data prefetching method for a WWW cache system including a cache server device for prefetching and storing WWW (World Wide Web) data, wherein WWW data of an externally registered Web page is stored in a cache server at a preset time. The method includes a step of caching from the device, a step of determining whether or not the content of the WWW data has been updated, and a step of notifying a result of the determination by e-mail.

That is, in the WWW cache system of the present invention, a WWW cache server system stores WWW data of a Web page requested by a user,
It caches (prefetches) at a set time, determines whether the content of the WWW data has been updated, and provides the determination result to the user using an electronic mail system. Hereinafter, the WWW data once cached is referred to as cache data.

[0010] More specifically, the WWW of the present invention will be described.
The cache system includes a timer setting reading unit that reads a set time set in a user setting storage unit in advance by a user and starts the present system at the set time, and a URL (Uniform Resource) that has been accessed so far.
e Locator) data, the URL data stored by the user stored in the user setting storage unit, and the actual data accessed by the system stored in the URL data storage unit so far. URL data search means for reading and comparing certain URL data, and, when the URL data matches existing URL data, reading cache data of the matching URL data from the cache data storage unit and temporarily storing the cache data in the first cache data temporary storage unit. A first cache data reading unit for storing, and a request for WWW data of a Web page of a matching URL to a proxy server device, and reading cache data obtained by a response to the request from a cache data storage unit to read a second cache data; Store in temporary data storage And second cache data reading means. Here, the URL is an identifier indicating the position of the Web page on the Internet, and it is possible to uniquely specify the Web page.

If the URL data registered by the user does not match the URL data stored in the URL data storage unit, the second cache data reading means sets the URL
A request is sent to the proxy server device for L WWW data, and cache data obtained by a response to the request is read from the cache data storage unit and stored in the second cache data temporary storage unit. The URL data search unit stores the URL data that did not match the data in the URL data storage unit in the URL data storage unit.

The cache data comparing means compares the cache data in the first cache data temporary storage section with the cache data in the second cache data temporary storage section to determine whether or not there is a difference between them. In this case, it is determined that the WWW data of the Web page has been updated. The cache data comparing means compares the two cache data and if there is no difference, the WW of the Web page
It is determined that the W data has not been updated.

Looking at the source of a general web page,
HTML (hypertext markup lan)
The title of the Web page is described in a <title> tag based on a description method in the form of “. Title tag search means is <title> in WWW data.
The title of the Web page described in the tag is retrieved from the cache data and stored in the title data storage.

The mail creating means reads the mail address registered by the user in advance from the mail address data storage section and the title data of the Web page collected by the title tag search means from the title data storage section, and sends the mail address to the mail address. Create an email.
The mail transmitting unit transmits the mail created by the mail creating unit.

The user receives the e-mail sent at a specific time by using the output device, and refers to the contents of the e-mail, thereby updating the WWW data of the Web page registered in advance. Can be confirmed. As a result, the user can reduce the access time to the Web page due to the prefetch effect of the cache server, and reduce the number of accesses to the Web page that has not been updated. As a result, it is possible to reduce network traffic. It becomes possible.

Further, by setting the activation time of the present system to a time when the traffic of the network is small, it is possible to minimize the increase in the traffic of the network in the daytime.

[0017]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a WWW (World Wide Web) cache system according to an embodiment of the present invention. In FIG. 1, a WWW cache system according to an embodiment of the present invention caches WWW data of a Web page at an input device 1 such as a keyboard and a time set by a timer, compares the data and collects a title, and performs processing. A data processing device 2 for creating and transmitting an e-mail from the result, a data storage device 3 for storing information, a cache server device 4 for caching WWW data generally installed in an intranet, and receiving an e-mail And an output device 5 as a terminal device for displaying on a display or the like.

The data processing device 2 includes a timer setting reading means 21 for reading a time setting, and a URL (Uniform R).
(Source Locator) URL data search means 22 for reading and searching data, and first cache data reading means 23 for reading existing cache data.
A second cache data reading means 24 for reading updated cache data, a cache data comparing means 25 for comparing WWW data, and <t
title> tag search means 26 for searching for the title of the web page by searching the title>tag>, mail creation means 27 for creating an email, and mail transmission means 28 for sending an email to a mail address registered by the user.
And

The data storage unit 3 stores a set time and URL data set by the user.
A URL data storage unit 32 for storing URL data that has been accessed so far, a first cache data temporary storage unit 33 for temporarily storing existing cache data, and a temporary storage for updated cache data. And a title data storage unit 35 for storing the title of the Web page.
And a mail address data storage unit 36 for storing a mail address registered by the user.

The cache server device 4 stores the Web data in a cache area (the first cache data temporary storage unit 3).
3 and a cache data storage unit 41 for caching in the second cache data temporary storage unit 34).

In FIG. 1, timer setting reading means 21
Reads the preset time set by the user from the user setting storage unit 31 and starts the present system at the set time. UR
The L data storage unit 32 stores URs that have been accessed so far.
L data is stored.

The URL data search means 22 stores the URL data registered by the user stored in the user setting storage section 31 and the URL data stored in the URL data storage section 32 which has been accessed by the system so far. Is read and compared. URL data search means 22 is U
URL that did not match the data in the RL data storage unit 32
The data is stored in the URL data storage unit 32.

When the URL data registered by the user matches the existing URL data, the first cache data reading means 23 reads the cache data of the matching URL data from the cache data storage unit 41 and temporarily stores the first cache data. The cache data is temporarily stored in the storage unit 33.

The second cache data reading means 24 requests the proxy server device (not shown) for the WWW data of the Web page of the above matching URL, and stores the cache data obtained by a response to the request to the cache data. The data is read from the unit 41 and stored in the second cache data temporary storage unit 33.

Second cache data reading means 24
When the URL data registered by the user and the URL data stored in the URL data storage unit 32 do not match, a request is made for the WWW data of the URL to the proxy server device, and the cache data obtained by a response to the request is transmitted to the proxy server device. Cache data storage unit 4
1 and the second cache data temporary storage unit 34
To be stored.

The cache data comparing means 25 compares the cache data in the first cache data temporary storage 33 with
The cache data in the second cache data temporary storage unit 34 is compared with the cache data to determine whether there is a difference between them. The cache data comparing means 25 compares the two cache data and if there is a difference, the WWW of the Web page
Judge that the data has been updated. When there is no difference between the two pieces of cache data, the cache data comparison unit 25 determines that the WWW data of the Web page has not been updated.

FIG. 2 is a diagram showing an example of WWW data representing WWW data in a source format. In FIG. 2, WWW
Looking at a WWW data example 71 in which data is represented in a source format, a general Web page includes a <head> tag and a </ h
<title> in the header part surrounded by
A tag is described, and the portion between the tags is the title of the Web page “Camus Main S
"item" is described.

The title tag search means 26 sets <title
> And </ title> tags, the title of the Web page “Camus Main”
“Site” is retrieved from the cache data and stored in the title data storage unit 35.

The e-mail creating means 27 reads the e-mail address registered by the user in advance from the e-mail address data storage part 36, and reads the Web page title data collected by the title tag search means 26 from the title data storage part 35. Read and compose an e-mail addressed to that e-mail address.

FIG. 3 is a diagram showing an example of a mail text created by the mail creating means 27 of FIG. The mail creation by the mail creation means 27 will be described with reference to a mail sentence example 81 shown in FIG.

The mail creating means 27 reads the title data "Camus" collected by the title tag searching means 26.
Main Site ”,“ News Site ”,“ S
ports news Site "," Weather
news Site "," Maker Site ",
“Keijiban”, “Newsperper Sit
"e" is read from the title data storage unit 35 and attached to the mail text, and the WWW data is updated by the cache data comparison unit 25 and the title of the Web page of the URL that did not match the data in the URL data storage unit 32. The * mark is added to the title of the Web page that has been determined to be.

In the e-mail text example 81 of FIG. 3, the asterisks are added to “News Site” and “Spo”.
rts newss Site ”,“ Weather n
ews Site "," Newsperper Sit
e ”.

The mail sending means 28 is the mail creating means 2
The e-mail created in step 7 is transmitted to an e-mail address registered in the e-mail address data storage unit 36 in advance.

Thus, the user receives the e-mail sent at a specific time by using the output device 5,
By referring to the content of the e-mail, it is possible to confirm whether the WWW data of the Web page registered in advance has been updated.

As a result, the user can shorten the access time to the Web page due to the prefetch effect of the cache server, and reduce the number of accesses to the Web page that has not been updated. As a result, the traffic on the network can be reduced. can do.

By setting the activation time of the present system to a time when the traffic on the network is small, it is possible to minimize the increase in the traffic on the network during the day.

FIGS. 4 to 6 show WWs according to an embodiment of the present invention.
5 is a flowchart illustrating the operation of the W cache system. The operation of the WWW cache system according to one embodiment of the present invention will be described with reference to FIGS.
Hereinafter, a description will be given using a WWW data example 71 shown in FIG. 2 and a mail text example 81 shown in FIG.

The timer setting reading means 21 reads the set time registered by the user from the user setting storage section 31, and activates the system at that time (step S1 in FIG. 4). When the system is started, the URL data search means 22 reads one URL data registered by the user from the user setting storage unit 31 (step S2 in FIG. 4) and determines whether or not the registered URL data remains (step S2 in FIG. 4). FIG. 4 step S
3).

When the registered data remains, the URL data search means 22 reads the existing U
The RL data is read (step S4 in FIG. 4), the existing URL data is compared with the URL data registered by the user, and it is determined whether both URL data match (step S5 in FIG. 4).

If the URL data registered by the user from the user setting storage unit 31 does not match the URL data stored in the URL data storage unit 32, the URL data search means 22 matches the data in the URL data storage unit 32 with the URL data. The missing URL data is stored in the URL data storage unit 32 (step S7 in FIG. 4).

Further, the second cache data reading means 24 determines that the WWW data of the URL is not cached in the cache data storage section 41 due to the mismatch of the URL data, and sends the WWW data of the URL to the proxy server device. The cache data obtained by a response to the request is read from the cache data storage unit 41 and stored in the second cache data temporary storage unit 34 (step S8 in FIG. 4).

Here, looking at a WWW data example 71 shown in FIG. 2, a general Web page includes a <head> tag and a <head> tag.
/ Head> tag in the header section
e> tag is described, and the portion sandwiched between the tags is the title “Camus Main” of the Web page.
Site ”is described.

The title tag search means 26 sets <title
> And </ title> tags, the title of the Web page “Camus Main”
"Site" is retrieved from the cache data and stored in the title data storage unit 35 (step S9 in FIG. 4).

When the URL data registered by the user and the existing URL data match, the first cache data reading means 23 reads the cache data of the matching URL data from the cache data storage unit 41 and reads the first cache data. It is stored in the temporary storage unit 33 (step S6 in FIG. 4 and steps S21 to S23 in FIG. 6).

If there is no cache data of the matching URL data in the cache data storage unit 41, the second cache data reading means 24 reads the WW of the URL.
Request W data to the proxy server device,
The cache data obtained by the response thereto is read from the cache data storage unit 41 and stored in the second cache data temporary storage unit 34 (steps S22 and S30 in FIG. 6).

The title tag search means 26 searches the cache data stored in the second cache data temporary storage section 34 for the title of the WWW page, and stores the search result in the title data storage section 35 (FIG. 6). Step S31).

After the cache data in the cache data storage unit 41 is stored in the first cache data temporary storage unit 33 by the first cache data read unit 23, the second cache data reading unit 24
A request is sent to the proxy server device for LWW data, and cache data obtained by a response to the request is read from the cache data storage unit 41 and stored in the second cache data temporary storage unit 34 (steps S24 and S25 in FIG. 6). ).

The cache data comparing means 25 compares the cache data stored in the first cache data temporary storage section 33 with the second cache data temporary storage section 34.
(Step S26 in FIG. 6), and it is determined whether there is a difference between them (FIG. 6).
Step S27).

The cache data comparison means 25
If there is a difference between the two cache data, W
It is determined that the WWW data of the eb page has been updated, and 2
If there is no difference between the two cache data, it is determined that the WWW data of the Web page has not been updated.

The title tag search means 26 searches for the title of the WWW data in the compared cache data, discriminates between data having a difference in cache data and data having no difference, and stores the data in the title data storage unit 35 (FIG. 6). Steps S28 and S29).

After the URL data search means 22 has processed all the URL data, the mail creation means 27 reads the mail address registered in advance by the user from the mail address data storage section 35 (step S3 in FIG. 4 and step S10 in FIG. 5). ).

As an example of an e-mail text 81 shown in FIG. 3, the e-mail creating means 27 reads the title collected by the title tag searching means 26 from the title data storage unit 35, attaches the title to the e-mail text, and sends it to the URL data storage unit. 3
2 and the title of the Web page of the URL that did not match the data of
The * mark is added to the title of the Web page for which it is determined that the W data has been updated (steps S11 to S1 in FIG. 5).
4).

The mail sending means 28 is the mail creating means 2
The e-mail created in step 7 is transmitted to an e-mail address registered in advance in the e-mail address data storage 36 (step S15 in FIG. 5).

As described above, the e-mail sent at a specific time is received by using the output device 5, and the contents of the e-mail are referred to, so that the W
It is possible to confirm whether or not the WWW data of the web page has been updated, and it is possible to reduce the number of accesses to the web page that has not been updated, so that network traffic can be reduced.

Further, by setting the activation time of the present system to a time when the traffic of the network is small, it is possible to minimize the increase in the traffic of the network in the daytime.

In this case, the user can shorten the access time to the Web page due to the prefetch effect of the cache server. Also, by setting the system startup time to a time when network traffic is low, 1
Network traffic throughout the day can be smoothed.

[0057]

As described above, according to the present invention, W
In a WWW cache system including a cache server device for prefetching and storing WW data, WWW data of a Web page registered from outside is cached from a cache server device at a preset time, and the W
By judging whether or not the content of the WW data has been updated, and notifying the result of the judgment by e-mail, there is an effect that network traffic can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a WWW cache system according to one embodiment of the present invention.

FIG. 2 is a diagram showing an example of WWW data representing WWW data in a source format.

FIG. 3 is a diagram showing an example of a mail text created by a mail creating means 27 of FIG. 1;

FIG. 4 is a flowchart showing an operation of the WWW cache system according to one embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of the WWW cache system according to one embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the WWW cache system according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input device 2 Data processing device 3 Data storage device 4 Cache server device 5 Output device 21 Timer setting reading means 22 URL data searching means 23 First cache data reading means 24 Second cache data reading means 25 Cache data comparing means 26 Title tag search means 27 E-mail creation means 28 E-mail transmission means 31 User setting storage part 32 URL data storage part 33 First cache data temporary storage part 34 Second cache data temporary storage part 35 Title data storage part 36 E-mail address data storage Unit 41 Cache data storage unit

Claims (8)

[Claims] 1. A WWW (World Wide Wed)
b) a WWW cache system including a cache server device for prefetching and storing data, wherein the cache means caches WWW data of a Web page registered from the outside from the cache server device at a preset time; A WWW cache system comprising: a determination unit for determining whether the content of WWW data has been updated; and a notification unit for notifying the determination result by e-mail. 2. The cache unit includes: a unit that starts a system at a preset time; and a URL (Uniform) of a Web page that has been accessed so far.
A resource locator (URL) data storage means for storing data,
search means for comparing the URL data of page b with the URL data stored in the URL data storage means;
First cache data of the URL data for which a match is detected by the search means is read from the cache server device and temporarily stored in the first cache data temporary storage means.
Cache data reading means, and requesting WWW data of the Web page registered from the outside to the proxy server device, and reading cache data obtained by a response to the request from the cache server device to temporarily store the second cache data. 2. The WWW cache system according to claim 1, further comprising a second cache data reading unit that stores the data in a storage unit. 3. The means for comparing the cache data of the first cache data temporary storage means with the cache data of the second cache data temporary storage means to determine whether or not there is a difference therebetween. When there is a difference between these two cache data, the Web
3. The WWW cache system according to claim 2, wherein it is determined that the WWW data of the page has been updated. 4. The system according to claim 1, wherein said notifying means includes: title tag searching means for searching a title of said web page in said WWW data from said cache data; and title data of said web page collected by said title tag searching means. 4. The mail server according to claim 2, further comprising: a mail creating unit that creates an electronic mail addressed to the registered mail address; and a mail sending unit that sends the electronic mail created by the mail creating unit. WWW cache system. 5. WWW (World Wide Wed)
b) A method of prefetching WWW data of a WWW cache system including a cache server device for prefetching and storing data, wherein a WW of an externally registered Web page
Caching W data from the cache server device at a preset time; and determining whether or not the content of the WWW data has been updated;
Notifying a result of the determination by e-mail. 6. The step of caching the WWW data includes a step of activating the system at a preset time and a step of activating a URL (Uniform Resource Locator) of a Web page that has been accessed so far.
attor) URL data stored in URL data storage means for storing data and W registered from the outside.
comparing the URL data of the web page with the URL data of the web page, reading the cache data of the URL data for which a match is detected in the comparison from the cache server device, and temporarily storing the cache data in the first cache data temporary storage unit; Requesting the WWW data of the Web page registered from the server to the proxy server device, reading cache data obtained in response to the request from the cache server device, and storing the cache data in the second cache data temporary storage means. 6. The WWW data prefetching method according to claim 5, wherein: 7. The step of determining whether or not the cache data has been updated includes comparing the cache data of the first cache data temporary storage means with the cache data of the second cache data temporary storage means. 7. The WWW data read-ahead according to claim 6, further comprising a step of determining whether there is a difference, and determining that the WWW data of said Web page has been updated when there is a difference between these two cache data. Method. 8. The step of notifying the determination result includes the step of searching for the title of the Web page in the WWW data from the cache data, and the step of notifying based on the title data of the searched Web page. 8. The W according to claim 6, further comprising a step of creating an e-mail addressed to the e-mail address and a step of transmitting the created e-mail.
WW data prefetching method.