JP3212925B2 - Information browsing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an information browsing system for accessing various information by accessing a WWW (World Wide Web) server on the Internet or an intranet.

[0002]

2. Description of the Related Art Homepages on the Internet, intranets and the like are browsed by accessing a WWW server from each WWW browser. At this time, the address to be accessed is a URL (Uniform Resource Locator), and the protocol used for access is http (Hyper
Text Transfer Protocol). What information (data) the WWW server returns by access from the WWW browser is determined by HTML (Hyper Text Markup).
Language) A description language is used to describe in the WWW server.

FIG. 5 is a block diagram showing the configuration of a general network relating to WWW. The general WWW browsers A3, A3, and A3 each have a cache mechanism A3 for improving access speed and reducing network load.
1, A31 and A31. WWW Browser A
3, A3 and A3 cache the data obtained from the WWW server A1 for the URL once accessed.
1, when accessing the same URL again, the data is retrieved from the cache A31 and used without accessing the WWW server A1.

[0004] The proxy server A2 is arranged between the WWW servers A1, A1, A1 on the network and the WWW browsers A3, A3, A3 on the network, and has the same purpose as the cache mechanism A31 of the WWW browser A3.
It is a device having a function, and a WWW browser A3, A3,
If the cache mechanism A21 is hit in response to the access from A3, the data retrieved from the cache mechanism A21 is returned instead of the WWW server A1.

When the WWW browser A3 makes a data request to the WWW server A1, the cache mechanism A31 / A21 of the WWW browser A3 or the proxy server A2 has
Performs a search in the cache mechanism A31 / A21 using the URL as a keyword as to whether the relevant data has already been retrieved from the WWW server A1 and the data still exists in the cache mechanism A31 / A21.

Japanese Patent Application Laid-Open No. 4-313126 discloses a technique in which when data requested by a client computer to a server computer exists in a cache, the validity of the data in the cache is confirmed by the same data update time. It has been disclosed.

However, since there is no transfer procedure for data update time information in http, it is not possible to confirm whether or not the data in the cache is the latest data. Therefore, the cache mechanism A31 // in the WWW browser A3 or the proxy server A2 has A21 is a cache mechanism A31 / A21
The data is extracted without checking whether there is a difference between the data existing in the server and the original data in the WWW server A1.

An embodiment of the prior art will be described with reference to the drawings. FIG. 6 is a conceptual diagram showing a display image on a conventional WWW browser. Here, “FIG.
In page 1B1 shown in (a), the contents of the variables in the WWW server are visually displayed as an image B11, and the contents operation B121 (variable operation: set to 0) / B122 ( Variable operation: add 1) /
B123 (variable operation: 1 is subtracted), and the result of the operation is displayed on page 2B3, which is the next page shown in FIG.
In the same format as the page 1B1. However, it is assumed that there is a rule that the relationship between the variable content and the image content is one-to-one or many-to-one. Will be described as an example.

FIG. 7 is a conceptual diagram showing the contents of HTML description for displaying the above-mentioned home page according to the prior art. A. As shown in FIG. html (page 1) C
In C.1, first, C.I. The cgi is activated to display an image (C11). This C. cgi creates image data based on the contents of variables in the WWW server, and generates “Content-type: i
CGI (Common Gateway) to output in a format such as “mage / gif”
Interface) program.

Next, a variable operation 1 /
Wait for 2/3 (C12). When the variable operation 1/2/3 is executed from the WWW browser, B.B. cgiC2 is activated. This B. The cgi program C2 operates the contents of the variables in the WWW server according to the type of the variable operation, cg
By activating i, an image is displayed as page 2 shown in FIG. 7B based on the variable contents (C21).

FIG. 8 is a sequence diagram showing an http sequence according to the prior art. Each request from the WWW browser D1 is transmitted to the WWW server D2, and the contents of those requests are returned to the WWW browser D1. However, on page 2 C.I. cgi request D1
07 is C.I. on page 1. Since the URL is the same as the cgi request D103, the cache mechanism D12 is hit, and the request is not actually made to the WWW server D2, and the cache mechanism D1 is used instead of the image D208 after updating the variables.
The image data D204 before the variable update, which is the same as page 1 in page 2, is extracted and displayed.

[0012]

As described above, in the prior art, when displaying an image based on the updated variable content on page 2, the URL on page 1 and the URL on page 2 are the same. Because of this, the cache in the WWW browser or proxy server that has a cache mechanism works, and the image after updating the variable is not displayed,
As shown in FIG. 6B, there is a problem that the image before updating the variables is displayed.

Further, in order to obtain an image after updating a variable which has not been obtained due to the above problem, a WWW browser D1
When the user performs a reload (reload) operation, FIG.
As shown in FIG. 6D, a request for a variable operation is resent from the WWW browser D1 to the WWW server D2, and an unexpected content operation for the variable (in the example of FIG. 6,
Variable operation 2 of "adding 1" is performed twice).

The present invention has been made in view of the above-described circumstances, and when displaying an image corresponding to the content of a variable updated with respect to an original image, it is possible to always obtain an accurate image after updating the variable. It is another object of the present invention to provide an information browsing system that can eliminate the need for a reload operation by a user of a WWW browser and can prevent a duplicate content operation on a variable from being performed.

[0015]

In order to solve the above-mentioned problems, according to the first aspect of the present invention, various information can be browsed by being described in page units according to a predetermined notation format .
By accumulating data on a server and specifying various information according to the data by specifying an address corresponding to the page ,
An information viewing system for viewing at the end end of the terminal
Stores information received in the past in association with the address.
The server generates information determined based on predetermined variable contents, and when there is a variable operation on the predetermined variable contents, updates the variable based on the variable operation. for displaying the information after at said terminal, said the result of variable operation, addresses containing parameters explicitly updated variable, generates data described according to a predetermined representation format, the terminal When receiving, from the server, data describing an address including a parameter in which an updated variable is specified, which is a result of the variable operation, the parameter described in the data is received.
The address including the meter and the information cached in the past
The associated, that different and the address containing the parameter
The case, without operating the cache mechanism, the the result of variable operation, the variable after updating and displaying various types of information in accordance with the data address is written containing explicit parameters.

According to the second aspect of the present invention, the first aspect of the present invention is provided.
In the described information browsing system, it is described in page units according to a predetermined notation format, and various image information can be browsed
The data to be stored in the server, various images according to the data
The image information, by specifying an address corresponding to the page, the information viewing system for viewing by the end edge, the
The terminal associates the previously received image information with the address
The server has a cache mechanism for storing and reusing the variable , and the server performs a variable operation on a predetermined variable content.
Operating means, and an ad including a parameter specifying a predetermined variable for generating image information based on the content of the predetermined variable.
Less generates a data described according to a predetermined representation format, the result of the variable operation by pre Symbol variable operating means,
The address that contains the parameter that specifies the updated variable is
Comprising a data generating means for generating a new data written according to a predetermined representation format, in accordance with the data generated by said data generating means and image generating means for generating image information after variable update, the terminal, the sent from the server, the address containing the parameters explicitly given variables, and interpretation means for interpreting the data described according to a predetermined representation format, to access the new address is While making a request to the server and caching the image information from the server, if accessing the same address as the address associated with the previously cached image information , the cached image
Comprising a storage unit to retrieve the information, and display means for displaying the various kinds of image information according to the interpreted data by interpreting means or each species image information retrieved from said storage means, said terminal, said variable from said server The result of the operation is an attribute that contains a parameter with the updated variable specified.
Upon receiving the data address is written has been described in the data, address including parameters associated with the cache in the past image information, the parameters
In case that different from the address including, without using the cached image information in the storage means, add containing the result of the variable operation, the variable after updating is expressly parameters
And displaying various kinds of image information in accordance with data describing the address .

According to the third aspect of the present invention, the first aspect of the present invention is provided.
Or in the information browsing system according to 2, wherein the information is
The relationship between the displayed page and the address is at least one-to-one or one- to- many .

According to the fourth aspect of the present invention, there is provided the first aspect.
Or In 2 wherein the information browsing system, data described in accordance with notation format before Kisho constant is, HTML (Hype
r Text Markup Language) is characterized by a description language.

In the present invention, the server generates information determined based on the contents of a predetermined variable and transmits the information to a terminal. At this time, in response to a request from the terminal, if there is a variable operation on the predetermined variable content, the terminal displays the updated information based on the variable operation based on the variable operation. Generates data described in accordance with a predetermined notation format. The terminal usually has the same address information.
When you specify a broadcast displays the cached information. In contrast, the result of the variable operation from the server, A including variables after update is explicitly parameters
Upon receiving the data address is written has been described in the data, an address that contains parameters, associated with a cache in the past information, if the address containing the parameter difference exists, the cache mechanism Without operating, various information is displayed in accordance with data describing an address including a parameter in which an updated variable is specified, which is a result of the variable operation. Therefore, even on the second page corresponding to a different variable in which the variable operation has been performed, it is possible to always obtain an image after updating the variable, and it becomes unnecessary to perform a reload operation by the user of the WWW browser. , And it is possible to prevent duplicate content operations on variables.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a WW according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a W server and a WWW browser. FIG. 2 is a conceptual diagram showing page contents in the HTML language described according to the WWW access method according to the embodiment. In FIG. 1, in the embodiment of the present invention,
It is assumed that the network is a network in which the WWW server E1 and the WWW browser E2 are directly connected. WWW server E1
Is an html description for the first page. htm
1E11 and variable operation 1 / to operate the contents of the variable
B. This is a CGI program that performs ／ and outputs html related to the second page. CgiE12 and C.CgiE12, which generates an image based on the contents of variables. cgiE13 and a variable E14. WWW browser E2 is http
A p-processing unit E21 and a cache mechanism E22 are provided.

A. The content E3 of the htmlE11 is shown in FIG.
As shown in FIG. A description line E31 for activating the cgiE13 and a description line E32 for prompting the input of the variable operation 1/2/3 and waiting. B. cgiE12
The contents E4 of the html output by the C.C., as shown in FIG. A description line E41 for activating the cgiE13 is included, and the description line E41 includes a script name E4 of a full path.
11 and a parameter E obtained by converting the contents of the variable E14 into a character string.
413, a script name E411, and a parameter E413
And a separator E412 that separates them.

The difference between the embodiment shown in FIG. 2 and the prior art shown in FIG. 7 is that, in this embodiment, a parameter E413 in which the content of the variable E14 is a character string and a script name E
Separator E4 that separates 411 from the parameter E413
12 exists.

B. Operation of Example Next, the operation of this embodiment will be described in detail with reference to FIG. FIG. 3 is a sequence diagram showing an http sequence between the WWW server E1 and the WWW browser E2. From WWW browser E2 to A. html URL
Is input from the http processing unit E21 to the cache mechanism E22. The request F101 of html is supplied. Since the request F101 does not exist in the cache mechanism E22, it makes a mishit and is therefore transferred to the WWW server E1. The WWW server E1 has an A. html request F201 is received, the AWW. The contents of the html F202 to return the (see FIG. 2 (a)). The cache mechanism E22 receives the received A.D. html
After the content F202 is cached, it is transferred to the http processing unit E21. The http processing unit E21 performs the processing described in A.11. ht
When the content F102 of the C.ml is received, the content is analyzed and the C.F. cgi request F103
Is transmitted to the WWW server E1.

The cache mechanism E22 receives the received C.E. c
gi because the request F103 does not exist in the cache and thus misses. cgi request F103
To the WWW server E1. The WWW server E1
C. When the request F203 of Cgi is received, C.I.G. The content F204 (image data) of the cgi is returned to the WWW browser E2. The cache mechanism E22 receives the C.I. cgi contents F2
After caching 04, it is transferred to the http processing unit E21. The http processing unit E21 is a C.I. cgi contents F
104 is received, C.104 which is image data based on the content of the variable is received. The page 1 is displayed using the cgi contents F104 (image data).

Next, the variable operation 1 is performed from the WWW browser E2.
/ 2/3, the HTTP processing unit E21 sends the B.P. cgi request F105 is supplied,
Since the request F105 is a form, it is transferred to the WWW server E1 without performing a cache search. The WWW server E1 has a When the request F205 of cgi is received, the contents of the variable are updated in accordance with the variable operation 1/2/3, which is information in the request F205, and B.CGI is transmitted to the WWW browser E2. The content F206 of the cgi is returned. The cache mechanism E22 receives the received B.I. The content F206 of cgi (see FIG. 2B) is cached and transferred to the http processing unit E21. The http processing unit E21 performs cgi contents F10
6 (E41 in FIG. 2 (b)), the contents are analyzed, and C.6 described therein is analyzed. cgi? The request F107 of xxx is transmitted to the cache mechanism E22.

The cache mechanism E22 receives the received C.E. c
gi? xxx request F107 is already present in the cache. cgi is determined to be different from the request F103, resulting in a mishit. cgi? The request F207 of xxx is transferred to the WWW server E1. The WWW server E1 has a C.I. cgi? When the request F207 of xxx is received, the WWW browser E2 sends the C.xxx image data. The content F208 of the cgi is returned. The cache mechanism E22 receives the C.I. The content F208 of the cgi is cached and transferred to the http processing unit E21.
The http processing unit E21 is a C.I. When the content F108 of Cgi is received, C.I.G. cg
The page 2 is displayed using the content F108 of i.

Next, FIG. 4 is a sequence diagram showing an http sequence according to an embodiment of the present invention, in which the cache mechanism E22 is hit. When the value after updating the variable becomes “yyy”, it differs from “xxx” of the previous data request F107, and thus the cache mechanism E
22 and the data request G105 is again WW
Sent to W server E1. When the variable operation is performed again from the WWW browser E1 and the value after updating the variable becomes “xxx” again, the data request G109 is sent to the cache mechanism E2.
Since the hit is 2, the image F108 in the cache is extracted. Therefore, since the same image data F108 is not extracted again from the WWW server E1, the cache mechanism E2 for reducing the load on the network is used.
2 has the advantage of not impairing its inherent effect.

In the embodiment of the present invention described above, the number of variables and C.I. Although the case where the number of parameters of cgi is one has been described, the number of variables and the number of parameters are not limited.

[0030]

As described above, according to the present invention, according to the present invention, the server generates information determined based on the contents of a predetermined variable and transmits the information to the terminal.
When there is a variable operation for the predetermined variable content, an address including a parameter specifying the updated variable, which is a result of the variable operation, for displaying the updated information based on the variable operation on the terminal. Generates data described in accordance with a predetermined notation format and transmits the generated data to the terminal, wherein the terminal is a result of the variable operation from the server.
The address containing the parameter with the updated variable specified is
When the described data is received , the description
Is, an address that contains parameters, associated with a cache in the past information, if the address containing the parameter difference exists, without operating the cache mechanism is the result of the variable operation, the updated Various information is displayed according to the data in which the address including the parameter in which the variable is specified is described . Therefore, even on the second page corresponding to a different variable where the variable operation has been performed, the information after the variable update is always displayed. Images can be obtained and WW
The advantage is that the reloading operation by the user of the W browser can be made unnecessary, and the duplicated content operation for the variable can be prevented.

More specifically, since the cache mechanism of the WWW browser or the proxy server performs caching using the URL as a keyword, the URL for requesting display of an image is replaced with a character string of a variable value. By including and describing, it is possible to make those cache mechanisms recognize that the request is a different data. If the image corresponding to the content of the variable does not exist in the cache, the data request is transmitted to the WWW server. To be
In the page 2, the image after updating the variable can be always obtained, and the reload operation by the user of the WWW browser is not required, and the advantage that the operability can be improved can be obtained.

Further, since the WWW browser can obtain image data in accordance with the contents of the variables, it is not necessary for the user of the WWW browser to perform the reloading operation. By displaying the message so as not to perform it, an advantage is obtained that it is possible to prevent a duplicate content operation from being performed on the variable.

[Brief description of the drawings]

FIG. 1 shows a WWW server and a WW according to an embodiment of the present invention.
It is a block diagram which shows the structure of a W browser.

FIG. 2 is a conceptual diagram showing page contents in an HTML language described according to a WWW access method according to the embodiment.

FIG. 3 is a sequence diagram showing an http sequence between a WWW server E1 and a WWW browser E2.

FIG. 4 is a sequence diagram showing an http sequence according to an embodiment of the present invention.

FIG. 5 is a block diagram illustrating an example of a general network configuration regarding WWW.

FIG. 6 is a conceptual diagram showing one display example in a conventional WWW browser.

FIG. 7 is a conceptual diagram showing HTML description content of a conventional technique.

FIG. 8 is a sequence diagram showing an http sequence of the related art.

[Explanation of symbols]

 E1 WWW server (server) E11 A. html E12 B.I. cgi (variable operation means, page generation means) E13 C.I. cgi (image generation means) E14 variables E2 WWW browser (terminal) E21 http processing unit (interpretation means) E22 cache mechanism (storage means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 12/00 545 G06F 13/00 355

Claims (4)

(57) [Claims] 1. A written in page units according to a predetermined representation format, the data to be viewable various information stored in the server, various types of information according to the data, designates an address corresponding <br/> in the page it is, in the information viewing system for viewing by the end edge, the terminal corresponding to the address received in the past information
The server has a cache mechanism for holding and reusing the information. The server generates information determined based on the content of the predetermined variable, and when there is a variable operation on the content of the predetermined variable, the server generates the information based on the variable operation. for displaying the information after variable updated in the terminal, the the result of variable operation, addresses containing parameters explicitly updated variable, generates data described according to a predetermined representation format, the terminal Is an address including a parameter in which the updated variable, which is a result of the variable operation, is specified from the server.
When the data received describes the data ,
The described address including the parameter and the address including the parameter associated with the information cached in the past.
In case that different and the dress, without operating the cache mechanism is the result of the variable operation, the variable after updating that displays various information in accordance with the data address is written containing explicit parameters An information browsing system characterized by the following. 2. A written in page units according to a predetermined representation format, the data to be viewable various image information stored in the server, various types of image information according to the data, by specifying an address corresponding to the page in the information browsing system be viewed terminus, the terminal includes: the address of the image information received in the past
A cache mechanism for associating and holding and reusing the cache, wherein the server performs a variable operation on predetermined variable contents;
If the generate image information based on the predetermined variable contents, addresses containing parameters explicitly given variables, generates data described according to a predetermined representation format, the result of the variable operation by pre Symbol variable operating means in it, the address including the parameters explicitly updated variables, and the data production <br/> forming means for generating a new data written according to a predetermined representation format, generated by the data generating unit data And an image generation unit that generates image information after updating the variable, wherein the terminal is configured to include an address including a parameter indicating a predetermined variable transmitted from the server , in accordance with a predetermined notation format. interpreting means for interpreting the data, to access the new address, as well as issues a request to the server, the image information from said server While caching, corresponding to cache in the past image information
When accessing the same address as the assigned address, storage means for retrieving cached image information, and various images according to data interpreted by the interpreting means
Information or a display means for displaying each kind image information <br/> paper taken out from said storage means, said terminal, said the result of the variable operation from a server, the variable after updating is expressly Address containing the parameter
When the data received describes the data ,
Written, the address including parameters associated with the cache in the past image information, including parameters
In case that different from the free addresses, without using the cached image information in the storage unit, address including the the result of variable operating parameters which variable is explicitly updated
An information browsing system characterized by displaying various kinds of image information in accordance with data in which information is described . 3. The information browsing system according to claim 1, wherein the relationship between the page on which the information is displayed and the address is at least one-to-one or one- to- many . 4. The information browsing system according to claim 1, wherein the data described according to the predetermined notation format is described in an HTML (Hyper Text Markup Language) description language.