JP2010198055A - Web state monitoring system and web server - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly display the state change of a monitoring object on a Web page while reducing the labor of the adjusting work of a polling cycle. <P>SOLUTION: In a Web state monitoring system 1 in which a Web page on which the state change of a monitoring object is created by a Web server 4, and the Web page is downloaded to a client terminal 2 so as to be browsed, the Web server 4 includes: a change measuring means 52 for measuring the interval of the change of the state of the monitoring object; an update cycle calculation means 55 for determining the transmission cycle of an HTTP request from the client terminal 2 to the Web server 4 based on the interval measured by the change measuring means 52; and an HTTP reply transmission means 47 for transmitting the transmission cycle determined by the update cycle calculation means 55 to the client terminal 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a Web status monitoring system for monitoring a status change of a monitoring target and a Web server used therefor, and more particularly to a system or the like that can grasp a monitoring target status designated by a user through a Web browser.

  In recent years, in many companies, information sharing and work efficiency have been promoted by Web applications using an in-house intranet. A Web application has an advantage that anyone can use it if a Web page browsing program called a Web browser is installed in a terminal that uses the Web application.

  FIG. 8 is a block diagram showing a general configuration of the Web system as described above, and this system 80 includes a plurality of client terminals 81, a Web server 82, and a network 83 connecting them. The In the Web system 80, each client terminal 81 includes a Web browser 84 that operates on the client terminal 81, and the Web server 82 includes a Web application 85 that operates on the Web server 82 and a Web application 85. A database 86 for storing data to be used is mounted.

  Communication between the Web browser 84 and the Web server 82 is performed using a known protocol called HTTP (Hypertext Transfer Protocol), and information is transmitted to each other by exchanging HTTP messages. Here, a message from the client terminal 81 to the Web server 82 is referred to as an HTTP request, while a message from the Web server 82 to the client terminal 81 is referred to as an HTTP response.

  The Web page is usually described in HTML (Hypertext Markup Language), and is returned from the Web server 82 as an HTTP response. The web browser 84 of the client terminal 81 interprets the received HTML and displays a web page.

  Next, a procedure for displaying a Web page in the Web system 80 will be described.

  First, the user starts the Web browser 84 on the client terminal 81 and inputs a URL indicating a system to be used. The web browser 84 sends an HTTP request including the input URL to the web server 82 via the network 83. When receiving the HTTP request, the Web server 82 searches for the requested Web page, acquires information from the database 86 if necessary, and creates an HTML file.

  The HTML file created in this way is sent over the network 83 as an HTTP response. Thereafter, when the client terminal 81 receives an HTTP response from the Web server 82, the Web browser 84 analyzes the HTML file, and thereby a desired Web page is displayed on the client terminal 81.

  As described above, when displaying a web page, the web server 82 performs an operation of responding to the request with an HTTP response after receiving a web page request called an HTTP request. Therefore, even if the Web server 82 changes the content of the Web page displayed on the Web browser 84 on the client terminal 81, the change is voluntarily notified from the Web server 82 side to the Web browser 84 of the client terminal 81. Can not do it.

  For this reason, when the user wants to display the latest web page, the user manually sends an HTTP request to the web server 82 via the web browser 84, and the web server 82 sends the latest HTTP response as an HTTP response. A web page must be received and newly displayed.

  Therefore, in order to automatically update the Web page displayed on the client terminal 81, an HTTP request is periodically sent from the client terminal 81 to the Web server 82, so that the updated Web page is transmitted from the Web server 82. There has been proposed a Web system that appropriately obtains. In this system, a timer is set in advance in a Web page for which automatic updating of display contents is desired, and program code for requesting the Web page to the Web server 82 when the timer expires is embedded. At this time, the timer is set to time out at a cycle in which the display is to be updated.

  Under such a configuration, when the Web browser 84 of the client terminal 81 receives a Web page as an HTTP response from the Web server 82, the Web browser 84 interprets the program code, displays the Web page, and starts a timer. Then, when the timer times out, the program code for requesting the Web page in the Web browser 84 is executed, and an HTTP request is automatically transmitted to the Web server 82. By repeating this operation, it becomes possible to periodically receive information about the Web page from the Web server 82, and the latest Web page can be displayed on the client terminal 81.

  2. Description of the Related Art In recent years, a Web status monitoring system that uses the above-described Web system to display the status of a monitoring target (for example, a communication line) on a Web page and to monitor the status of the monitoring target while browsing it on the client terminal 81. It has been put into practical use. This Web status monitoring system is configured to create a Web page that displays the status of the monitoring target on the Web server 82 and download and display it on the client terminal 81.

  However, in the conventional Web system, the automatic update cycle (polling cycle) of the Web page cannot be set to an unlimited short in order to avoid the risk of unnecessary network traffic and an increase in the load on the Web server 82. For this reason, it has to be set to a fixed cycle having a certain interval, and as a result, it becomes difficult to make the display content of the Web page follow the state change of the monitoring target, resulting in a display omission of the state change. There is.

  In the above Web system, it is necessary to predict the degree of state change of the monitoring target to some extent, and then set a polling cycle suitable for the monitoring target in advance, but predict the frequency of state change of the monitoring target. If this is not possible, or if the monitoring target repeats irregular changes, there is a problem that adjustment work must be performed several times while repeating trial and error, and setting the polling cycle is very laborious.

  Therefore, the present invention has been made in view of the above-described problems in the prior art, and can appropriately display the state change of the monitoring target on the Web page while reducing the labor of adjusting the polling cycle. An object of the present invention is to provide a possible Web state monitoring system and the like.

  In order to achieve the above object, the present invention provides a web status monitoring system that creates a web page displaying a status change of a monitoring target on a web server, downloads the web page to a client terminal, and browses the web page. The server determines a transmission period of a request signal from the client terminal to the Web server based on a change measurement unit that measures an interval at which the state of the monitoring target changes, and an interval measured by the change measurement unit. Transmission period determining means, and transmission period transmitting means for transmitting the transmission period determined by the transmission period determining means to the client terminal.

  And according to this invention, in order to determine the transmission cycle of the request signal from a client terminal after measuring the space | interval which the state of a monitoring object changes, the transmission cycle according to the condition of an actual state change is determined. be able to. For this reason, it is possible to set an appropriate transmission cycle without repeating complicated adjustment work, and to reduce the labor involved in setting the polling cycle.

  Also, by transmitting the transmission cycle determined as described above to the client terminal, the request signal is automatically sent from the client terminal to the Web server at a cycle (interval) suitable for the status change state of the monitoring target. Will be sent. Thereby, the state change of the monitoring target can be downloaded to the client terminal at an appropriate interval, and the state change of the monitoring target displayed on the Web page can be suitably updated.

  In the Web status monitoring system, the change measurement unit performs the interval measurement process while dividing the interval in units of a predetermined period, and when the plurality of intervals are measured in one predetermined period, The transmission interval determination unit can determine the transmission cycle of the request signal based on the minimum interval derived by the change measurement unit. According to this, since the transmission cycle of the request signal is determined according to the minimum interval of the state change, the transmission cycle can be determined according to the state change state, and the frequency of occurrence of the state change display failure is greatly increased. Can be reduced.

  In the Web status monitoring system, a plurality of the monitoring targets are grouped, the change measuring unit derives the minimum interval within the same group, and the transmission cycle determining unit determines the transmission cycle of the request signal in units of groups. can do. According to this, even when there are a large number of monitoring targets, it is sufficient to perform processing in units of groups, so that it is possible to reduce the load on the Web server and increase the processing speed.

  In addition, the present invention is a Web server that creates a Web page displaying a change in state of a monitoring target and displays the Web page on a client terminal, and measures change of measuring an interval at which the state of the monitoring target changes. Means, a transmission period determining means for determining a transmission period of a request signal from the client terminal toward the Web server based on the interval measured by the change measuring means, and a transmission period determined by the transmission period determining means. Transmission period transmitting means for transmitting to the client terminal.

  As described above, according to the present invention, it is possible to appropriately display the state change of the monitoring target on the Web page while reducing the trouble of adjusting the polling cycle.

1 is an overall configuration diagram showing an embodiment of a Web state monitoring system according to the present invention. It is a figure which shows the data structure of the status information storage part of FIG. 1, a change information storage part, and a session information storage part. It is a flowchart which shows operation | movement of the Web server at the time of a status recording process. It is a figure which shows the operation | movement at the time of line condition reception. It is a flowchart which shows operation | movement of the web server at the time of an update period setting process. It is a figure which shows the system configuration at the time of applying the Web state monitoring system of FIG. 1 to the monitoring of a line condition. It is a figure which shows an example of the web page in the system of FIG. It is a whole block diagram which shows the conventional Web system.

  Next, modes for carrying out the invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of a Web status monitoring system according to the present invention. This system 1 includes a client terminal 2 and a Web server 4 connected to each other via a network (not shown), and a monitoring target ( And a monitoring device 6 that notifies the Web server 4 of a state change (not shown). In FIG. 1, only one client terminal 2 and monitoring device 6 are shown, but a plurality of these devices are installed.

  The client terminal 2 includes a web browser 21 that can browse web pages. The Web browser 21 is provided with an HTTP request transmission unit 22 that transmits an HTTP request to the Web server 4 and an HTTP response reception unit 23 that receives an HTTP response from the Web server 4. The Web browser 21 requests the target display page 24 from the Web server 4 through the HTTP request transmission unit 22 and the target display page 24 through the HTTP response reception unit 23 when the user wants to refer to the monitoring target state. Configured to download.

  The target display page 24 includes a timer generation unit 25 that generates display update timers 1 to n, a display update timer group 26 that indicates a collection of the generated display update timers 1 to n, and display update timers 1 to n. In response to the time-out, status request means 27 for requesting the status of the monitoring target from the Web server 4, status receiving means 28 for receiving the status of the monitoring target from the Web server 4, and the received status of the monitoring target are displayed immediately before. The status display means 29 is included for updating the status display in the Web browser 21 in comparison with the completed status. Here, the display update timers 1 to n are generated in the same number as the number of monitoring target groups described later.

  The Web server 4 records a Web server program 41 that controls communication processing with the client terminal 2 and an interval at which the state of the monitoring target changes, and determines an update period of the Web page according to the recorded state change interval. And a state change processing unit 42.

  The Web server program 41 is a general Web server program such as IIS (Internet Information Service) or Apache, and an external program such as CGI (Common Gateway Interface) or ASP (Active Server Page). It has a function to execute. The Web server program 41 includes an HTTP request receiving unit 43 that receives an HTTP request from the client terminal 2, a Web page generating unit 46 that generates a status acquisition page 44 and a target display page 45 and performs HTML conversion, and a creation HTTP response transmitting means 47 for transmitting the HTML thus received to the client terminal 2 as an HTTP response.

  Note that the target display page 45 created by the Web page generation unit 46 is the same as the target display page 24 of the client terminal 2, that is, the target display page 24 of the client terminal 2 is the same as that of the Web server 4. The client terminal 2 downloads a file (HTML file or the like) of the target display page 45 created by the web page generation unit 46 and expands it on a memory (not shown) through the web browser 21.

  The state change processing unit 42 is stored in the state change receiving unit 49 that receives the state of the monitoring target notified from the monitoring device 6, the state information storage unit 50 that stores the received state, and the state information storage unit 50. A state acquisition unit 51 for extracting information, a change measurement unit 52 for measuring an interval at which the state of the monitoring target changes, a change measurement timer 53 for dividing the measurement process in the change measurement unit 52 at predetermined intervals, and a change measurement The change information storage unit 54 that stores the measurement result of the means 52, the update cycle calculation unit 55 that calculates the update cycle of the Web page based on the information in the change information storage unit 54, and the monitoring target set by the client terminal 2. Session information storage unit 56 for accumulating monitoring target groups as session information, and a session for registering session information in the session information storage unit 56 And a recording means 57.

  Among the information storage units 50, 54, and 56, the status information storage unit 50 identifies “group information” indicating a group to which the monitoring target belongs and individual monitoring targets as shown in FIG. “Identifier information”, “status information” indicating the status of the monitoring target, and “last update date information” indicating the date and time when the status change of the monitoring target was last detected are stored.

  Further, in the change information storage unit 54, as shown in FIG. 2B, “group information”, “previous minimum interval information” indicating the minimum value of the state change interval measured in the immediately preceding measurement period, “Current minimum interval information” indicating the minimum value of the state change interval measured in the current measurement period is stored.

  Further, in the session information storage unit 56, as shown in FIG. 2C, a “session identifier” for identifying session information, “group information” indicating a line group assigned to each session, “Update cycle information” indicating the update cycle is stored. In FIG. 2C, an IP address is illustrated as a session identifier.

  Next, the operation of the Web state monitoring system 1 having the above configuration will be described.

  The processing executed by the Web status monitoring system 1 includes “status recording processing” that receives information indicating the status change of the monitoring target in real time from the monitoring device 6 and records the status change of the monitoring target momentarily, and the recorded status change. Based on the above, the optimum request request cycle is determined, and the processing is roughly divided into two processes of “update cycle setting process” for setting the determined cycle in the client terminal 2. Therefore, first, the former “state recording process” will be described with reference to FIGS.

  When the monitoring device 6 detects a state change (for example, line change) to be monitored, information indicating that fact is notified to the Web server 4 through the communication line, and is transmitted to the state change receiving means 49 of the Web server 4. The Next, in the state change receiving means 49, the “last update date / time information” (see FIG. 2A) is extracted from the status information storage unit 50 and held as the status update date / time of the immediately preceding monitoring target.

  Next, as shown in FIG. 3, the state change receiving means 49 identifies the received status of the monitoring target (for example, “normal”, “abnormal”) and the date and time when the monitoring target status was received, , “Status information” and “last updated date and time information” (see FIG. 2A) are stored in the status information storage unit 50 (step A1). At the same time, the change measuring means 52 calculates the state change interval from the state update date and time immediately before being held by the state change receiving means 49 and the reception date and time of the monitored state, and stores them in the change information storage unit 54. A specific method for measuring the change interval in the change measuring means 52 will be described in detail later.

  Subsequently, the display update cycle of the group to which the monitoring target to which the state has changed belongs is calculated (step A2), and then the session update information with the calculated display update cycle as “update cycle information” (see FIG. 2C). Store in the storage unit 56 (step A3).

  Next, a method for measuring the change interval in the change measurement unit 52 will be described with reference to FIGS. 2 and 4 with specific examples. Note that FIG. 4 shows an example of the case where a plurality of telephone lines are monitored, and the change interval calculation method (state change amount measurement method) when the status of each line changes is tracked in order of time. 4A to 4F, the line status for each line is represented by changes in the vertical axis with the horizontal axis as time.

  In FIG. 4, the “reference point” indicates the timing when the change measurement timer 53 times out. Here, the time-out value of the change measurement timer 53 (the predicted value of the state change amount to be monitored). It is assumed that 60 seconds are set in advance). Furthermore, it is assumed that the lines A and B in the figure belong to the same monitoring group.

  First, taking the case of FIG. 4A as an example, the line status change interval (starting point) from the time immediately after the system is started until the line status change is received or until the timeout of the change measurement timer 53 occurs. And the end point) cannot be specified, so the change interval is treated as unknown. Similarly, when there is no line change during the measurement period for a line group, the change interval of the line status is treated as unknown.

  After the system is started, the line status of a certain line changes (in the case of FIG. 4 (a), the line A changes from "free" to "in use"). Since the date and time of occurrence of the change (state change before “vacant”) is unknown, the minimum value of the change interval of the line status is treated as unknown. Thereafter, as shown in FIG. 4B, when a further change in the line status (returning the line A from the “in use” state to the “empty” state) occurs, the change measuring means 52 takes the timing. The change interval of the line status is calculated (in the case of FIG. 4B, “15 seconds”). However, since the change measurement timer 53 has not timed out at this time, the calculated interval is stored in the “current minimum interval information” (see FIG. 2B) of the change information storage unit 54 as a provisional value. .

  Next, as shown in FIG. 4C, when the change measurement timer 53 times out, the change measuring means 52 resets the reference point and the change information storage unit 54 confirms the “current minimum interval information”. The value (15 seconds) is rewritten to the “previous minimum interval information” (see FIG. 2B) side. When the value (15 seconds) is rewritten as “previous minimum interval information”, “unknown” is set in “current minimum interval information”.

  Thereafter, as shown in FIG. 4D, for example, when a change with a change interval of 20 seconds or 10 seconds occurs on the line B side until the change measurement timer 53 times out from the reference point. The shorter 10 seconds is stored in the change information storage unit 54 as “current minimum interval information”.

  Further, as shown in FIG. 4 (e), when the change measurement timer 53 times out, the change information storage unit 54 sets the value of “current minimum interval information” (10), as in FIG. 4 (c). Second) is rewritten to the “previous minimum interval information” side, and “unknown” is set in the “current minimum interval information”. In the case of FIG. 4 (e), in addition to a change in line B with an interval of 20 seconds and 10 seconds, a change in line A with an interval of 45 seconds and a change in line B with an interval of 30 seconds. However, since these intervals are longer than 10 seconds, and the lines A and B belong to the same monitoring group, any change interval is ignored.

  In FIG. 4F, the status change interval of the line A is 20 seconds, and the current value of the “current minimum interval information” in the change information storage unit 54 is unknown. Update.

  As described above, when measuring the state change amount, “the reference point is moved to the time point when the change measurement timer 53 times out, and the“ current minimum interval information ”in the change information storage unit 54 is moved. The operation of “moving the value stored in the“ previous minimum interval information ”” and “every time a change in the status of a monitoring target is detected, the change interval is calculated, and the calculated change interval is stored in the change information. In contrast to the minimum change interval of the same group stored in the unit 54, the state change interval of the monitoring target is recorded by repeating the two operations of “sequentially update the current minimum interval information”. To go.

  According to this method, since it is not necessary to manage the history of individual state changes, it is possible to save the trouble of searching the status of the corresponding monitoring target from a large amount of history when receiving the status change of the monitoring target. The state change interval can be derived at high speed.

  Next, the “update cycle setting process” of the processes executed by the Web state monitoring system 1 will be described with reference to FIG.

  Since this process is started by an HTTP request from the client terminal 2, the user first activates the Web browser 21 and inputs a URL (Uniform Resource Locator) for displaying a status to be monitored. The Web browser 21 transmits an HTTP request including the designated URL to the Web server 4 by the HTTP request transmission unit 22.

  Here, the URL is expressed in a format such as “http: // web-server / XXXXXX”. Further, by adding the number of the monitoring target group to the HTTP request, it is possible to specify the monitoring target in units of groups in each of the client terminals 2.

  When the HTTP request is transmitted from the client terminal 2, the HTTP request receiving unit 43 of the Web server 4 receives the HTTP request from the client terminal 2 as shown in FIG. In addition, the URL information is transferred. Next, the Web page generation unit 46 refers to the URL information received from the HTTP request reception unit 43, determines which of the target display page 24 and the state acquisition page 44 is to be generated, and is further included in the HTTP request. The group to be monitored is identified from the information to be monitored (step B1).

  The generation page may be determined by assigning different URLs to the target display page 24 and the state acquisition page 44 in advance, and using the URL itself as a reference (for example, the target display page 24 → http: //web-server.○○○○.html, status acquisition page 44 → http: //web-server.△△△△.html), or use query string (For example, the target display page 24 → http: //web-server.xxx.html, the status acquisition page 44 → http: //web-server.xxx.html? Request = true).

  Next, it is confirmed whether or not the session information of the client terminal 2 is unregistered in the session information storage unit 56 (whether or not it is a new session) (step B2). (B2: Yes), the session registration means 57 newly registers session information (step B3). This session information includes the identifier (for example, IP address) of the client terminal 2, the monitoring target group, and the display update cycle of the monitoring target group (see FIG. 2C).

  Next, the update cycle calculation means 55 calculates the update cycle of the requested monitoring target group (step B4). In calculating the update cycle, first, the value of “current minimum interval information” (see FIG. 2B) stored in the change information storage unit 54 and the value of “previous minimum interval information” (FIG. 2B). ))). Then, a smaller value is acquired as the minimum value of the state change interval of the monitoring target, and the update cycle is determined based on this minimum value.

  At this time, the update cycle is determined so that the cycle becomes shorter as the change interval becomes smaller, and conversely, when the state change interval is larger, it may be determined so that the update cycle becomes longer. At this time, the update cycle and the change interval may be set to have a simple proportional relationship, or may be set to have a non-linear relationship. Note that when the monitoring target state change interval cannot be specified, such as immediately after the Web server 4 is started, a default value of a predetermined update cycle is applied.

  When the update cycle calculation process ends, as shown in FIG. 5, the update cycle calculation means 55 determines the update cycle of the monitoring target group requested from the client terminal 2 side, and the session information storage unit 56 Information is updated (step B5).

  On the other hand, when the session information of the client terminal 2 has been registered in the session information storage unit 56 (step B2: No), monitoring is performed from the session information storage unit 56 without performing the processing of steps B3 to B5. The update cycle of the target group is acquired (step B6).

  Next, the Web page generation unit 46 generates a target display page 45 (target display page 24) in which a script that periodically requests a monitoring target state is embedded according to the update cycle determined in steps B4 and B6 ( Step B7). The target display page 45 includes a script that realizes the display update timer group 26, the state request unit 27, the state reception unit 28, the timer generation unit 25, and the state display unit 29 described above. The script here refers to all program codes (script language, binary code) that can be executed in the Web browser, and is not limited to a specific script language.

  Thereafter, the Web server program 41 transmits the target display page 45 created by the Web page generation unit 46 to the client terminal 2 by the HTTP response transmission unit 47.

  When the client terminal 2 receives the target display page 45 from the Web server 4, it is interpreted by the Web browser 21 and expanded as the target display page 24. The timer generation means 25 in the target display page 24 creates display update timers 1 to n based on the update cycle described in the target display page 24, and starts each timer.

  Then, when the display update timers 1 to n time out, the Web server 4 is requested for the latest status of the corresponding monitoring target group, and the status request unit 27 issues an HTTP request for requesting the status acquisition page 44 to the Web server 4. Send.

  When the Web server 4 receives the HTTP request, the Web page generation unit 46 executes the generation process of the state acquisition page 44 for the request. At this time, the latest state stored in the state information storage unit 50 is acquired by the state acquisition unit 51 and is reflected in the state description portion of the state acquisition page 44. At the same time, the update cycle calculation means 55 acquires the update cycle and reflects it in the corresponding part of the status acquisition page 44.

  The state acquisition page 44 ′ thus generated is returned to the client terminal 2 by the HTTP response transmission unit 47. The client terminal 2 receives the status acquisition page 44 ′ by the HTTP response receiving unit 23 and passes it to the status receiving unit 28. The status receiving unit 28 displays the status of the monitoring target in the status acquisition page 44 ′ on the Web browser 21 by the status display unit 29. Further, the status receiving unit 28 acquires the update cycle in the status acquisition page 44 ′, and resets the update cycle to the timeout value of the display update timer of the corresponding monitoring target group. Thereafter, until the user stops browsing this page, the status request of the monitoring target is repeated and the status display is updated to the latest status.

  As described above, according to the present embodiment, the Web server 4 determines the transmission period of the HTTP request from the client terminal 2 after measuring the interval at which the state of the monitoring target changes. It is possible to determine the transmission cycle in accordance with the change situation. In addition, even when there is a change in the state change interval, the transmission cycle of the request signal can be sequentially changed following the change, so an appropriate transmission cycle can be set without repeating complicated adjustment work. This makes it possible to reduce the labor involved in setting the polling cycle.

  In addition, by transmitting the transmission cycle determined as described above to the client terminal 2, the client terminal 2 automatically notifies the Web server 4 at a cycle (interval) suitable for the state change status of the monitoring target. A request signal is transmitted. Thereby, the state change of the monitoring target can be downloaded to the client terminal 2 at an appropriate interval, and the state change of the monitoring target displayed on the Web page can be suitably updated.

  Next, a specific embodiment to which the Web state monitoring system 1 is applied will be described with reference to FIGS.

  FIG. 6 is an example applied to a system in which the usage status of an extension telephone is displayed on the Web browser 21 so that the status of the other party can be grasped before making a call. In this system, as the monitoring device 6 in FIG. 1, an exchange 6A having a function of notifying the outside of the usage status of housed station lines, relay lines, extensions, and the like is used. In FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 7 shows an image of a Web page displayed on the client terminal 2. The Web page displays a URL input area for inputting a URL, an extension number to be monitored, and the status of each extension. And a status display unit to perform.

  First, the user inputs a system URL to be used in the URL input field (see FIG. 7) on the Web page via the Web browser 21. In this application example, a Web page is created for each department, and a line group to be displayed can be specified for each input URL. It is also possible to adopt a configuration in which the user designates a line group to be displayed on the Web browser 21.

  The Web browser 21 requests a Web page from the Web server 4 by the line status request unit 27A. In the system shown in FIG. 6, line group 1 and line group 2 are monitored, and the display area is divided into frames for each line group.

  Next, the web server program 41 on the web server 4 receives the web page request by the HTTP request receiving means 43 and generates a corresponding line status page 45A. The line status page 45A confirms that the information of the client terminal 2 that requested the Web page is not registered in the session information storage unit 56 by the session registration unit 57, and newly registers it in the session information storage unit 56.

  The line status page 45A is transmitted to the client terminal 2 through the HTTP response transmission unit 47 by the above-described processing in the Web server 4, and is analyzed and displayed by the Web browser 21 of the client terminal 2. Thereafter, the line status page 45A requests each page of the linked line group 1 and line group 2.

  When the Web server 4 receives a request for the pages of the line group 1 and the line group 2 from the client terminal 2, the Web server 4 generates the line status acquisition page 44A by the Web page generation unit 46, and stores the state information by the line status acquisition unit 51A. The latest line status is acquired from the unit 50, and a display page is generated.

  At the same time, the line status acquisition page 44A acquires the update period of each line group by the update period calculation means 55, and again embeds a script for requesting this page to the Web server 4 within the page within a predetermined time. . In this way, each of the line group 1 web page and the line group 2 web page is generated and transmitted to the client terminal 2.

  The client terminal 2 displays these Web pages received by the line status receiving unit 28A via the HTTP response receiving unit 23 in the display area of the corresponding line group. FIG. 7A shows a display example of the page displayed as described above.

  Subsequently, as shown in FIG. 7B, the Web browser 21 requests the Web server 4 to update the line group 1 using a script embedded in the page of the line group 1, and the display is updated if there is a state change. Is done. Further, after 2.5 seconds, the script embedded in the line group 2 page requests the Web server 4 to update the display of the line group 2, and updates the status display (FIG. 7C). At this time, the display update of the line group 1 is requested at the same time, but the display update is not performed because there is no change in the line status.

  As described above, the latest line state can be continuously displayed by sending a request to the Web server 4 at a specified update cycle by a script embedded in a page for each line group.

  In the present embodiment, an example has been described in which a Web page is divided into frames for each line group and the line group is displayed in units of frames. However, the communication between the Web browser and the Web server can also be realized by a method using Ajax. Is possible.

DESCRIPTION OF SYMBOLS 1 Web status monitoring system 2 Client terminal 4 Web server 6 Monitoring apparatus 6A Exchange 21 Web browser 22 HTTP request transmission means 23 HTTP response reception means 24 Target display page 24A Line status page 25 Timer generation means 26 Display update timer group 27 Status request Means 27A Line status request means 28 Status reception means 28A Line status reception means 29 Status display means 29A Line status display means 41 Web server program 42 State change processing unit 43 HTTP request reception means 44 Status acquisition page 44A Line status acquisition page 45 Target display page 45A Line status page 46 Web page generation means 47 HTTP response transmission means 49 State change reception means 49A Line status change reception means 50 Status information storage unit 51 Status acquisition means 51A Line status acquisition means 52 Change Measuring means 53 changes measuring timer 54 changes information storage unit 55 updates period calculating means 56 the session information storage 57 session registration means

Claims (4)

A web status monitoring system that creates a web page displaying a status change of a monitoring target on a web server, downloads the web page to a client terminal, and browses the web page.
The web server
Change measuring means for measuring an interval at which the state of the monitored object changes; and
A transmission cycle determining unit that determines a transmission cycle of a request signal from the client terminal toward the Web server based on the interval measured by the change measuring unit;
A Web state monitoring system comprising: a transmission cycle transmission unit that transmits a transmission cycle determined by the transmission cycle determination unit to the client terminal. The change measurement means performs the measurement process of the interval while dividing the change unit by a predetermined period, and derives a minimum interval among the plurality of intervals when measuring the plurality of intervals in one predetermined period,
The Web status monitoring system according to claim 1, wherein the transmission cycle determination unit determines a transmission cycle of the request signal based on the minimum interval derived by the change measurement unit. Grouping a plurality of the monitoring targets,
The change measuring means derives the minimum interval within the same group,
The Web status monitoring system according to claim 2, wherein the transmission cycle determination unit determines a transmission cycle of the request signal in units of groups. A web server that creates a web page displaying a status change of a monitoring target and displays the web page on a client terminal.
Change measuring means for measuring an interval at which the state of the monitored object changes; and
Transmission period determining means for determining a transmission period of a request signal from the client terminal toward the Web server based on the interval measured by the change measuring means;
A Web server, comprising: a transmission cycle transmission unit that transmits the transmission cycle determined by the transmission cycle determination unit to the client terminal.

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