JPH1139341A - Page display device in www system and recording medium which records program and which machine can read - Google Patents

Abstract

PROBLEM TO BE SOLVED: To vary the display form of a link existing in a displayed page according to whether the page instructed by the link can be referred to or not in a page display device in a WWW system. SOLUTION: When a WWW page data acquirement part 14 acquires the page from a WWW server 1-i, a page existence recognition part 18 checks whether the page which the link existing in the page instructs actually exists or not. When the page actually exists, an access right presence/absence judgment part 19 judges whether a user has access right on the page or not. A reference propriety judgement part 17 judges whether the page can be referred to or not based on the recognition result of the page existence recognition part 18 and the judgment result of the access right presence/absence judgement part 19. A display form decision part 15 decides the display form of the link in accordance with the judgement part result of the reference propriety judgement part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for acquiring and displaying a page from a WWW server, and in particular, based on a display form of a link in a displayed page, whether a page indicated by the link actually exists. The present invention relates to a technology that makes it possible to determine whether or not to perform the determination.

[0002]

2. Description of the Related Art As a large-scale distributed hypertext system on the Internet, World Wide Web (WW)
W) Systems are widely known in the art. In an interface of a hypertext system such as a WWW system, a page representing one piece of information semantically includes a plurality of links to other pages usually represented by buttons, underlined text, and the like. By clicking with a mouse or the like, pages indicated by the link can be browsed one after another. In the WWW system,
The page specified by the link in the hypertext system is specified in a uniform resource locator (URL) format. The URL format is a naming method for uniquely defining a page in the WWW system on the Internet. For example, "http: // server / dir /
file. The URL “html” is the host name “se
rver "on the WWW server, and the file name" dir /
file. html ”is an HTML document file.

By the way, in a page display device of a conventional WWW system, a URL pointing to a page displayed once and a link pointing to the page displayed once have been displayed by storing the URL of the page displayed once as a read page. In some cases, a link indicating a page that is not displayed is displayed in a different form. For example, a link pointing to a page that has never been displayed is decorated with a solid line underlining, and a link pointing to a displayed page is decorated with a dotted line underlining. Thus, the user can distinguish the unread page from the read page only by looking at the display of the link.

[0004]

SUMMARY OF THE INVENTION In a WWW system, a URL for specifying a page specified by a link is specified.
Is simply a name for uniquely defining the resources of the WWW system on the Internet, and the existence of the page specified by the URL is not guaranteed. Therefore, in the WWW system, the page specified by the URL may not actually exist. However, since the page display device of the conventional WWW system merely changes the display mode of the link indicating the unread page and the link indicating the read page, it is difficult to access just by looking at the display of the link. It was not possible to determine if the page you actually did exist. For this reason, in the conventional page display device, there is a problem that a user may perform useless access operation to a non-existent page, and when such an access operation is performed, a response is returned from the WWW server. There is a problem that the waiting time until returning is a wasteful time, and efficient browsing cannot be performed.

Accordingly, an object of the present invention is to make it possible to determine whether or not a page specified by a link actually exists based on the display form of the link.
It is to prevent a useless access operation such as accessing a non-existent page.

[0006]

According to the present invention, there is provided a page display device in a WWW system, which acquires a page to be displayed from a WWW server in order to achieve the above object.
A page data acquisition unit, a page existence confirmation unit that confirms whether or not the page specified by the link in the page acquired by the WWW page data acquisition unit actually exists;
A display mode determining unit that determines the display mode of the link based on the result of the confirmation by the page presence checking unit, and a page obtained by the WWW page data obtaining unit, and displaying the link in the page in the display mode. And a WWW page display unit that is determined by the determination unit and displayed in a display form.

In this configuration, the WWW page data acquisition unit acquires a page to be displayed from the WWW server,
The page existence confirmation unit confirms whether or not the page specified by the link in the page acquired by the WWW page data acquisition unit actually exists, and the display mode determination unit determines based on the confirmation result of the page existence confirmation unit. The display form of the link is determined by the display unit, and the WWW page display unit displays the page acquired by the WWW page data acquisition unit and displays the link in the page in the display form determined by the display form determination unit.

Further, the page display device in the WWW system of the present invention can determine whether or not the user has an access right to the page specified by the link based on the display form of the link in the page. An access right presence / absence determining unit that determines whether a current user has an access right to a page specified by a link in a page acquired by the WWW page data acquisition unit, and a determination by the access right presence / absence determination unit A reference availability determining unit that determines whether a page specified by a link in the page acquired by the WWW page data acquisition unit can be referenced based on the result and the confirmation result of the page presence confirmation unit And the display form determination unit replaces the confirmation result of the page presence confirmation unit with the reference And a structure which determines the display mode of the link based on the determination result of the determination unit.

In this configuration, the access right presence / absence determining unit determines whether or not the current user has the access right to the page specified by the link in the page obtained by the WWW page data obtaining unit, and refers to the reference. The availability determining unit can refer to the page indicated by the link in the page acquired by the WWW page data acquiring unit based on the determination result of the access right existence determining unit and the confirmation result of the page existence confirming unit. Then, the display mode determination unit determines the display mode of the link based on the determination result of the reference availability determination unit.

[0010]

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

FIG. 1 is a block diagram of an embodiment of the present invention, in which a page display device 1 and a plurality of WWW servers 2-1 to 2-2 are provided.
-N.

The page display device 1 includes a URL holding unit 11
, A display device 12 such as a CRT, and a WWW page display unit 1
3, a WWW page data acquisition unit 14, a display mode determination unit 15, a display mode determination rule holding unit 16, a reference availability determination unit 17, a page existence confirmation unit 18, an access right presence / absence determination unit 19, a user It comprises an information acquisition unit 20 and a user information holding unit 21.

When the user designates a link pointing to the next page to be displayed by a click operation or the like, the URL holding unit 11 stores the URL of the page designated by the link. That is, the URL of the page to be displayed next on the display device 12 is stored in the URL holding unit 11.

[0014] The WWW page data acquisition unit 14 is
The contents of the page specified by the URL passed from the page display unit 13 are stored in the corresponding WWW server 2-i (1 ≦ i
≤ N).

The page presence confirmation unit 18 has a function of determining whether or not each page specified by each link in the pages acquired by the WWW page data acquisition unit 14 actually exists. This determination is made, for example, by the WW indicated by the URL of the page.
When the above page is requested to the W server 2-j (1 ≦ j ≦ N) and the content of the page is sent from the WWW server 2-j as a response, it is determined that the page exists, and the corresponding page is determined. When it is notified that (file) does not exist, it is determined by determining that it does not exist.

The user information holding unit 21 stores a user ID, a password, and the like of a user who can use the page display device 1.
User information such as age and job level is stored.

The user information acquisition unit 20 has a function of acquiring user information of a user currently using the page display device 1 from the user information holding unit 21.

The access right presence / absence determining unit 19 uses the page display device 1 for each link in the page acquired by the WWW page data acquiring unit 14 for the access right to the page specified by the link. It has a function to determine whether the user has it. This determination is made, for example, for the WWW server 2-k (1 ≦ k ≦ N) indicated by the URL of the page.
The user information acquisition unit 20 sends the acquisition request of the page including the user information acquired, and when the content of the page is transmitted from the WWW server 2-k as a response, it is determined that the user has the access right. If it is notified that access is not possible, it is determined by determining that the user does not have access right. In other words, when the requested page has an age limit, the WWW server 2-k determines that the user has an access right based on the age in the transmitted user information, The content of the page is sent to the page display device 1, and when it is determined that the user does not have the access right, the user is notified that the access is not possible. Can be determined.

The reference permission / non-permission judging unit 17 determines that each page specified by each link in the pages acquired by the WWW page data acquiring unit 14 is “referenceable”.
Or "cannot be referenced because the page does not exist"
It is determined whether or not “there is no access right and reference is not possible”.
In other words, the page that has been confirmed to be present by the page presence confirmation unit 18 and that has been determined to have the access right by the access right presence / absence determination unit 19 is determined to be “referenceable”. Is determined as "page cannot be referred to because the page does not exist", and the page whose existence is confirmed by the page existence confirmation unit 18 and whose access right is determined to be absent by the access right determination unit 19 is determined. It is determined that "there is no access right and reference is not possible".

The display mode determination rule holding unit 16 holds rules for determining the link display mode. There are various ways to write this rule,
For example, with respect to the determination results of the reference permission determining unit 17 of “page cannot be referred because the page does not exist”, “access not permitted due to lack of access right”, and “reference permitted”, “display in normal format” and “normal In the case of assigning the display form of “display in the form of
It can be described in a table format as shown in Table 2. Also,
{If page exists and can be referred to then "highlighted in italics / underline" else "display in normal format"} and described in an if-then format rule. Further, a condition for determining whether the page indicated by the link is unread or read may be described in addition to the parameter in addition to the parameter. The highlighting method is
Any method can be used as long as the highlighted portion can be distinguished from other portions, for example, “bold / italic display”,
“Underlined display”, “colored display”, “shaded display”, “stereoscopic display”, or the like, or a combination thereof may be used.

The display mode determination unit 15 stores the display mode of each link present in the page acquired by the WWW page data acquisition unit 14 in the judgment result of the reference availability determination unit 17 and the display mode determination rule storage unit 16. And a function for determining based on the display format determining rule.

The WWW page display unit 13 displays the page acquired by the WWW page data acquisition unit 14 on the display device 12 and displays each link existing in the page in the display format determined by the display format determination unit 15. It has a function to do.

FIG. 3 is a flowchart showing a processing example of the WWW page display unit 13, FIG. 4 is a flowchart showing a processing example of the display form determining unit 15, and FIG. 5 is a flowchart showing a processing example of the reference availability determining unit 17. Hereinafter, the operation of this embodiment will be described with reference to the drawings.

Referring to the flowchart of FIG. 3, when the URL of the next page to be displayed is set in the URL holding unit 11, the WWW page display unit 13 acquires the URL of the next page to be displayed from the URL holding unit 11. (Step A1). Subsequently, the content of the page indicated by the URL acquired in step A1 is acquired using the WWW page data acquisition unit 14 (step A2).

Thereafter, the WWW page display section 13 displays the WW
Until all the contents of the page acquired using the W page data acquisition unit 14 are displayed on the display device 12 (until step A3 becomes YES), the contents are sequentially displayed on the display device 12 (step A4). If what is to be displayed is a link (step A5 is YES), the display form determining unit 15
Is used to determine the display form of the link, and the link is displayed in the determined display form (step A6). When the display mode of the link is determined using the display mode determination unit 15, W
The WW page display unit 13 passes the URL of the page specified by the link to the display mode determination unit 15.

When the URL of the page specified by the link whose display mode is to be determined is passed from the WWW page display unit 13, the display mode determining unit 15 stores the display mode determining rule as shown in the flowchart of FIG. A rule for determining a display form is obtained from the unit 16 (step B1). Thereafter, the display mode determination unit 15 causes the reference availability determination unit 17 to determine whether the page indicated by the URL is accessible (step B2). At this time, the display mode determination unit 15 passes the URL to the reference availability determination unit 17.

The reference permission / non-permission determining unit 17 includes a display mode determining unit 1.
When the URL is passed from 5, as shown in the flowchart of FIG. 5, it is confirmed whether or not the page indicated by the URL actually exists using the page existence confirmation unit 18 (step C1).

If it is confirmed that the page does not exist, the reference permission / non-permission determining unit 17 notifies the display form determining unit 1 of the fact.
5 is notified (step C4).

On the other hand, if it is confirmed that the page exists, the user ID of the user currently using the page display device 1 is passed to the user information acquisition unit 20 and the user information of the user is transmitted to the user information acquisition unit 20. It is obtained from the information storage unit 21 (step C2). After that, the access right presence / absence determining unit 19 is operated, and the U
It is determined whether the current user has the access right to the page indicated by the RL (step C3). When judging the presence or absence of the access right, the reference availability determination unit 17
The URL passed from the display mode determination unit 15 is passed to the access right presence / absence determination unit 19, and the access right presence / absence determination unit 19
When the RL is passed, it indicates, for example, WWW
An acquisition request for the page including the user information acquired by the user information acquisition unit 20 is sent to the server 2-k, and the presence or absence of an access right is determined based on the response.

When the access right presence / absence determination section 19 determines that the current user has the access right, the reference permission / non-permission determination section 17 sets the display form determination section 15
Is notified that the page indicated by the URL can be referred to (step C6), and when it is determined that the user does not have the access right, the display mode determination unit 15 does not have the access right and cannot refer to the page. Is notified (step C5).

The display mode determining unit 15 includes the reference availability determining unit 1.
When the determination result is sent from the server 7, step B 3 in FIG.
As shown in, based on the determination result of the reference availability determination unit 17 and the rule for determining the display mode obtained in step B1,
The display mode of the link corresponding to the URL passed from the WWW page display unit 13 is determined, and the result is notified to the WWW page display unit 13.

When the display mode of the link is notified from the display mode determination unit 15, the WWW page display unit 13 displays the link in the notified display mode (FIG. 3, step A).
6).

Now, for example, as shown in FIG. 6, in the page 21 acquired by the WWW page data acquisition section 14, a link (document A) 24 to the page 22 and a link (document B) 25 to the page 23 are provided. 2 are included, and the rule for determining the display mode is as shown in FIG.

When displaying the link 24, the WWW page display unit 13 passes the URL of the page 22 specified by the link 24 to the display mode determining unit 15 and causes the display mode determining unit 15 to determine the display mode of the link 24. (FIG. 3, step A6).

The reference permission / inhibition judging section 17 sets the UR of the page 22
When L is passed, the page presence confirmation unit 18 checks whether or not the page 22 actually exists (FIG. 5, step C).
1). In this example, since the page 22 actually exists, the reference permission / inhibition determination unit 17
Then, it is determined whether the current user has an access right to the page 22 (step C3). Now, for example, if it is determined that the user has the access right to the page 22, the reference availability determination unit 17 notifies the display mode determination unit 15 of "reference possible" (step C6).

Thus, the display mode determination unit 15 determines that the display mode of the link 24 is to be "highlighted with italic and underline" (step B3 in FIG. 4). Thereby, W
The WW page display unit 13 highlights the link 24 in the page 21 as shown in FIG. 7 (displayed in italics and underlined).

The same processing is performed when the link 25 is displayed, and the display mode of the link 25 is determined. If the current user does not have access to page 23 indicated by link 25, link 2
5 is displayed in a normal format as shown in FIG.

FIG. 8 shows a display example of page 21 when the current user has an access right to pages 22 and 23 in the above-described example, and both links 24 and 25 are highlighted. Is displayed.

In the above-described embodiment, the display mode is set to "display in a normal format" in both the case where "the page does not exist and cannot be referred" and the case where "the user has no access right and cannot be referred". (Refer to FIG. 2) For example, in the case of "cannot be referenced because the page does not exist", "display in normal format"
In the case where “access is not permitted and reference is not possible”, “colored display” may be used. In this way, the user can know the reason why the user cannot refer to the information only by looking at the display of the link.

[0040]

As described above, the page display device in the WWW system of the present invention changes the display form of the link depending on whether or not the page indicated by the link actually exists. The user does not needlessly perform an access operation on a page that does not exist. As a result, the user can browse the page efficiently.

Further, the page display device in the WWW system of the present invention changes the display form of the link in consideration of whether or not the user has the access right to the page designated by the link. The user does not needlessly perform an access operation to a page he does not have. As a result, the user can browse the page more efficiently. .

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of contents of a display form determination rule holding unit 16;

FIG. 3 is a flowchart showing a processing example of a WWW page display unit 13;

FIG. 4 is a flowchart illustrating a processing example of a display mode determination unit 15;

FIG. 5 is a flowchart illustrating a processing example of a reference availability determination unit 17;

FIG. 6 is a diagram showing a relationship between a link and a page.

FIG. 7 is a diagram showing an example of a page image displayed on the display device 12.

8 is a diagram illustrating another example of a page image displayed on the display device 12. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Page display device 2-1 to 2-N ... WWW server 11 ... URL holding part 12 ... Display device 13 ... WWW page display part 14 ... WWW page data acquisition part 15 ... Display form determination part 16 ... Display form determination rule holding Unit 17: Reference availability determination unit 18: Page existence confirmation unit 19: Access right existence determination unit 20: User information acquisition unit 21: User information holding unit

Claims (5)

[Claims] 1. A WWW page data acquisition unit for acquiring a page to be displayed from a WWW server, and confirming whether a page specified by a link in the page acquired by the WWW page data acquisition unit actually exists. A page presence confirmation unit, a display form determination unit that decides a display form of the link based on a confirmation result of the page presence confirmation unit, and a page acquired by the WWW page data acquisition unit. A WWW page display unit for displaying the link in the display format determined by the display format determination unit. 2. An access right presence / absence determination unit that determines whether a current user has an access right to a page specified by a link in a page acquired by the WWW page data acquisition unit; Based on the determination result of the determination unit and the confirmation result of the page presence confirmation unit, it is determined whether or not a page specified by a link in the page acquired by the WWW page data acquisition unit can be referenced. A reference availability determining unit, and wherein the display mode determination unit determines the display mode of the link based on the determination result of the reference availability determination unit instead of the confirmation result of the page presence confirmation unit. The page display device in a WWW system according to claim 1, further comprising: 3. The page presence confirmation unit requests the WWW server holding the page specified by the link for the page, and the WWW in response to the request.
3. The page display device in a WWW system according to claim 2, further comprising a configuration for confirming whether or not the page specified by the link actually exists based on a response from the server. 4. A WWW page data acquisition unit for acquiring a page to be displayed from a WWW server by a computer, and determining whether or not a page indicated by a link in the page acquired by the WWW page data acquisition unit actually exists. A page existence confirmation unit to confirm, a display form determination unit to decide a display form of the link based on a confirmation result of the page existence confirmation unit, a page acquired by the WWW page data acquisition unit, and A machine-readable recording medium that records a program for causing the link to function as a WWW page display unit that displays the link in the display format determined by the display format determination unit. 5. A WWW page data acquisition unit for acquiring a page to be displayed from a WWW server by a computer, and determining whether or not a page indicated by a link in the page acquired by the WWW page data acquisition unit actually exists. A page presence confirmation unit to be confirmed; an access right presence / absence determination unit that determines whether a current user has an access right to a page specified by a link in the page acquired by the WWW page data acquisition unit; Based on the determination result of the presence / absence determination unit and the confirmation result of the page presence confirmation unit, it is determined whether the page specified by the link in the page acquired by the WWW page data acquisition unit can be referenced. Table for determining the display form of the link based on the determination result of the reference determination unit A program for displaying a page acquired by the WWW page data acquisition unit and for functioning as a WWW page display unit for displaying the link in the page in the display format determined by the display format determination unit A machine-readable recording medium on which is recorded.