JP2009237725A - Monitoring system and monitoring server apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facility monitoring system for collecting facility situations in a building, and the like, from each monitoring server by means of browsers via the Internet and displaying the situations in browsers of a variety of specifications, while leaving the situations, as they are, in a plurality of monitoring servers without gathering them into a certain server. <P>SOLUTION: The facility monitoring systems are constituted of one or more display devices, each having browsers and one or more server apparatuses each having Web server functions, and are network-connected with one another. When a request form is accepted by the browser of the display, the server apparatus transmits a detection program for detecting characteristics to the browser; receives the result of the execution of the transmitted and detected program by the browser, detects the characteristics of the browser on the basis of the result; and selects a response program that obtains the data to be displayed by the browser from each server, according to the detected characteristics to transmit the response program to the browser. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a function for monitoring equipment such as a building, and more particularly to a technique for displaying a monitoring result.

Conventionally, a device for monitoring each facility (hereinafter referred to as “monitoring server device”) is connected to a network in order to check whether facilities such as buildings, for example, lighting facilities, air conditioning facilities, etc. are operating normally. They are connected so that they can concentrate on one place and grasp the status of the equipment.
Here, as a technology that can refer to the facility status of multiple buildings, collect the facility status of each building collected by the monitoring server device of each building, via the Internet etc., to the server device that comprehensively manages the facility status, There is a technology that can refer to all equipment states by accessing this server device (see Patent Document 1). According to this technology, the status of all facilities can be grasped by accessing this server device.

Moreover, in order for a user to grasp | ascertain the condition of an installation, there exist some which can display the installation condition collected by each monitoring server apparatus with a general purpose browser. According to this technique, a general-purpose browser may be used, and a special display device is not necessary.
JP 2000-308152 A

However, although the technology for collecting the status of all facilities in the server device has an advantage that the status of all facilities can be grasped only by accessing the server device, a large-capacity memory is required.
In addition, when displaying the equipment status with a general-purpose browser, there is an advantage that a special display device is not required, but there may be cases where the specifications of each browser differ, the version may be changed, or it may be changed by the user. , What has been displayed may not be displayed.

  Therefore, the present invention can collect the facility status from each monitoring server device via the Internet from the browser while the facility status of the building or the like is distributed to a plurality of monitoring server devices without being collected on a certain server, and The purpose is to provide a monitoring system that can be displayed on browsers of various specifications.

  In order to solve the above problems, a monitoring system of the present invention is a monitoring system including one or more display devices having a browser and one or more server devices having a Web server function, and the server device has characteristics. Characteristic detecting means for transmitting a detection program for detection to the browser, receiving data transmitted as a result of the transmitted detection program being executed by the browser, and detecting characteristics of the browser based on the result; When receiving a request from the browser of the display device, the characteristic detecting unit detects the characteristic of the browser, and a response program for acquiring data displayed by the browser from each server device is set to the detected characteristic. And responding means for selecting and transmitting to the browser.

Since the monitoring system according to the present invention has the above-described configuration, the server device can detect the characteristics of the browser that sent the request, so that a response program corresponding to the characteristics of the browser can be returned. become.
In other words, even if the browser is changed to one with a different specification from that at the time of installation of the monitoring server device or upgraded, the server device can return a response program corresponding to the current browser characteristics. Can acquire and display data from each server device.

Further, since the monitoring information of each monitoring server device can be acquired by the browser even if each monitoring server device stores it, a server device having a large-capacity memory becomes unnecessary.
Here, the browser characteristics refer to communication methods that can be used by the browser, the number of simultaneous connections, processing in reception order, and the like.
The monitoring system further includes characteristic storage means for storing the characteristics of the browser in association with an identifier based on a request from the browser, and the characteristic detection means stores the detected characteristic in the characteristic storage means. And when the response associated with the identifier is stored in the characteristic storage when the request is received from the browser of the display device, a response corresponding to the stored characteristic is stored. The program may be transmitted.

As a result, the detected browser characteristics can be stored, so that when a request is received from a browser that has once detected the characteristics, an appropriate response program can be returned without detecting the characteristics. .
In addition, the characteristic of the browser is the number of connections that the browser can establish simultaneously, and the response program that the response means transmits to the browser is left continuously, leaving at least one of the number of connections. It is good also as a program for establishing a connection and acquiring the data which the said browser displays from each server apparatus.

  Further, the detection program transmitted to the browser by the characteristic detection unit is that the browser transmits a plurality of requests to the server device almost simultaneously, and the received result is received from the browser by the server device. The characteristic detection means may detect that the number of connections that can be simultaneously established, which is the characteristic of the browser, is the number of requests received from the browser within a predetermined time.

As a result, the browser can know the number of connections that can be established at the same time, so that the browser sends a response program to the browser for processing while leaving a connection to communicate with the server device in an emergency etc. Will be able to.
In a system that monitors equipment, it is desirable to establish a persistent HTTP connection between a browser and a server device. This is because once a persistent connection is established, notifications such as the occurrence of an abnormality from the server device can be quickly detected. However, if a persistent connection is made, the connection remains established. If all the connections that can be established simultaneously are used, the browser cannot establish a new connection to the server device. , You will not be able to communicate. Therefore, it sends a response program that allows one to establish a connection other than a persistent connection.

Here, “substantially simultaneous” means that requests are transmitted continuously.
Further, the browser characteristic is whether or not processing is performed in the order in which the response messages are received regardless of the order of requests from the browser, and the response unit does not perform processing in the order received. The response program to be transmitted to may be a program that does not perform a persistent connection.

  In addition, the detection program transmitted to the browser by the characteristic detection unit transmits a plurality of requests that are specified so that the browser transmits different response messages to the server device at substantially the same time. The processing order of response messages to the request is transmitted to the server device, and the received result is the processing order of the response message, and the characteristic detection unit transmits the response message to the request by the server device. And the processing order of the response message, which is the result, the characteristics of the browser are processed in the order in which the response messages are received regardless of the order of requests from the browser. It may be detected.

As a result, it is possible to determine whether or not the browser processes the response messages in the order of reception. Therefore, in the case where the response messages are not processed in the order of reception, the persistent connection can be prevented from being used.
A persistent connection has the advantage of being able to quickly detect alarms from server devices, but browsers that do not process response messages in the order in which they are received when they are persistently connected to multiple server devices can quickly generate alarms. This is because there are cases where it cannot be detected.

That is, a browser that does not process in the order of reception is such that, for example, when a certain server device returns a response such as an alarm, processing for the response is not performed until there is a response from all connected server devices. For such browsers, the use of persistent connections will delay detection of alarms and the like.
The response program is an HTML document, and the response program sent by the response means to the browser specifies other server devices by the source specification description of the <img> tag, It is good also as a program which acquires the data displayed from a server apparatus.

The response program is an HTML document, and the response program that the response means transmits to the browser specifies a script source of another server device by a source specification description of a <script> tag, It is good also as a program which acquires the data displayed from each server apparatus.
Thereby, the browser can acquire the monitoring information from each monitoring server device, and the monitoring information can be collectively displayed.

Further, since the monitoring information of each monitoring server device can be acquired from the browser even if each monitoring server device stores it, a server device having a large-capacity memory becomes unnecessary.
A server device used in a monitoring system including one or more server devices having a Web server function, wherein the one server device detects characteristics when receiving a request from a browser. Transmitting a detection program to the browser, receiving a result of the transmitted detection program being executed by the browser, detecting a characteristic of the browser based on the result, and a request to the request from the browser Response means comprising: response means for selecting a response program for acquiring data displayed by the browser from each server device according to the characteristic detected by the characteristic detection means and transmitting the response program to the browser. To do.

  A computer program for causing a server device used in a monitoring system including one or more server devices having a Web server function to perform a response process detects characteristics when receiving a request from a browser. To the browser, and to the characteristic detection step of receiving the result of the transmitted detection program being executed by the browser and detecting the characteristic of the browser based on the result, to the request from the browser A response step of selecting a response program for acquiring data displayed by the browser from each server device as a response according to the characteristic detected in the characteristic detection step and transmitting the response program to the browser. And

  As a result, the monitoring system can be constructed.

<Embodiment>
<Overview>
The monitoring system according to the present invention displays the status of facilities monitored by a plurality of monitoring server devices (hereinafter referred to as “monitoring information”) in a batch by a browser of the monitoring information display device.

First, this monitoring system has the following two assumptions.
First, when the user accesses one monitoring server device, the browser automatically acquires and displays not only the monitoring device of the monitoring server device but also the monitoring information of each of the other monitoring server devices. Second, the browser is a normal Web browser, and its specifications can be changed.

A method corresponding to the first premise will be described in the section <Communication method> in <Overview of monitoring system> below.
The problem here is that there are multiple ways to implement the first premise, but browser specifications may not necessarily support all of them. That is, when the first premise is realized by a certain method, if the browser specification is changed, monitoring information may not be displayed in a batch.

When the browser specification is changed, the browser type and version are determined based on the User-Agent information included in the HTTP request header from the browser and the information obtained from the browser navigator object. It is conceivable that the server side is upgraded so that it can cope with the selected type.
However, the monitoring server device is usually left as it is once installed due to the property of monitoring equipment. Therefore, it cannot be expected that the version will be upgraded as the browser specifications change.

  This monitoring system automatically responds on the server side when requests are made from browsers with various specifications, or when browser specifications are changed, so that monitoring information can be displayed in a batch by the browser. is there. In other words, no matter what kind of unknown browser appears, even if the user individually changes the browser settings, it is possible to use one of the cross-domain communication means described in <Communication method> below. A system capable of performing communication can be provided.

  Specifically, the monitoring server device that transmits the monitoring information to be displayed on the browser detects the browser characteristics and sends a program for communication with the communication method according to the characteristics to the browser. Dealing with changes in browser specifications by running the program. This browser characteristic detection method will be described in the following <Browser characteristic detection method> section.

Here, before describing the monitoring system according to the present invention, an overall image of the present system will be described with reference to FIGS. 1 and 5 to 7.
<Overview of the monitoring system>
An overview of the monitoring system according to the embodiment of the present invention will be described in the following three sections. The first is the configuration of this system in the <System configuration example> section, the second is the communication system used in this system in the <Communication system> section, and the third is the <Communication procedure> section. The communication procedure between the devices of this system will be described.

<System configuration example>
First, a configuration example of a monitoring system according to an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a diagram illustrating a configuration example of a monitoring system according to an embodiment of the present invention.
The monitoring system 100 includes a main monitoring server apparatus 1000 that monitors facilities (110, 111), a monitoring server apparatus 2000 that monitors facilities (210, 211), and a monitor that monitors facilities (310, 311). The server device 3000 and the monitoring information display device (5000, 6000) are connected via the Internet 10.

In this figure, for convenience of explanation, three of the plurality of monitoring server devices are described, and one is referred to as a main monitoring server device. Further, only two of a plurality of facilities monitored by each monitoring server device (1000, 2000, 3000) are described.
In the present embodiment, it is assumed that the main monitoring server device 1000, the monitoring server device 2000, and the monitoring server device 3000 are monitoring the status of each facility, and periodically recording whether each facility is normal or not. Suppose you are.

<Communication method>
Here, in the present system, a mechanism is described in which when a browser accesses one monitoring server device, monitoring information of each of the other monitoring server devices can be acquired.
The browser of this system needs to acquire monitoring information from a plurality of monitoring server devices, but a normal Web browser basically cannot access a plurality of monitoring server devices at the same time from the viewpoint of security. There are cross-domain constraints. Therefore, it is necessary to realize the first premise using limited cross-domain communication means.

In the present embodiment, the following four communication methods are assumed as methods for acquiring monitoring information from each monitoring server device in order to collectively display the monitoring information. Here, for convenience, these four communication methods are named as IMG method, JSONP method, FIM (Fragment Identifier Messaging) method, and PROXY method, and will be described below.
In the first IMG method, an HTML (Hyper Text Markup Language) document described so that monitoring information can be displayed is sent from the main monitoring server device 1000 to the browser 5200, and the source (src) specification description of the <img> tag is used. In this method, the address of CGI or the like that returns image data for representing monitoring information on each other monitoring server device is designated, and the monitoring information from each other monitoring server device is also displayed together. The monitoring information is acquired as an image. When this method is used, each monitoring server device needs to have a conversion tool for generating image data or store image data in advance. Further, in this communication method, since the browser can only acquire the height and width of the image, in this embodiment, depending on the content of the monitoring information, for example, the degree of alarm, by returning an image of a different size to the browser, The monitoring information is to be transmitted to the browser. For example, when both the vertical and horizontal sizes are 1, it is determined that there is no abnormality, and other cases are abnormal.

The above-mentioned HTML includes a script for identifying the contents of the monitoring information, for example, the presence or absence of an abnormality, and displaying appropriate information according to the result. Each monitoring information from the device can be displayed. The subsequent processes after obtaining the monitoring information are the same for the second and third communication methods.
The second JSONP method is a method of performing communication by a <script> tag specifying a script source in a server of another domain, and reads and executes a callback function of another monitoring server device.

  Next, the third FIM method is a method of performing communication using the fragment identifier in the URL. The communication partner's HTML is taken into an infrastructure frame (IFRAME) and a request is made from there. Communication between frames uses a fragment identifier. Specifically, information is exchanged by a character string after # of the URL that is a fragment identifier. This is because the browser does not reload when the character string after # is changed.

The PROXY method is a method in which one monitoring server device relays access to other monitoring server devices. That is, one monitoring server device collects monitoring information of each other monitoring server device and returns it to the browser.
In this system, using any of these four methods, when a user causes a browser to access one server device, the monitoring information of each of the other monitoring server devices can be automatically acquired and displayed in a batch. Realize the mechanism.

<Communication procedure>
FIG. 5 is a diagram showing a communication procedure between the browser 5200 of the present system, the main monitoring server device 1000, and the monitoring server devices (2000, 3000). The browser 5200 is a browser provided in the monitoring information display device 5000. Details will be described in the section <Configuration> with reference to FIG.

Here, the main monitoring server apparatus 1000 is a monitoring server apparatus for which monitoring information is requested from the browser 5200, and stores an HTML document for each of the four communication methods described above. This HTML document is an HTML document for acquiring monitoring information from each monitoring server device, and is an entire HTML described in the <Configuration> section described later.
Each monitoring server device (2000, 3000) stores programs “iframe.cgi”, “img.cgi”, “json.cgi” for transmitting monitoring information of FIM, IMG, and JSONP methods, respectively. ing. These programs are programs for notifying the browser of the monitoring information of the own device, and are HTML for the own device described in the section <Configuration> described later.

In the PROXY method, since it is not a browser that communicates with another monitoring server device, there is no cross-domain restriction, and monitoring information is acquired from the other monitoring server device using a unique communication method. It should be noted that any one of “iframe.cgi”, “img.cgi”, and “json.cgi” may be used as a program for transmitting PROXY monitoring information.
First, in response to a user operation, the browser 5200 requests access to monitoring information by accessing the browser 5200 using the address of the main monitoring server device 1000 (see (1)). It is assumed that the address of the main monitoring server device 1000 is input by the user or registered in advance in the browser, for example.

The main monitoring server apparatus 1000 that has received the request transmits detection HTML to the browser 5200 in order to detect the characteristics of the browser 5200 that has requested the request (see (2)). The browser 5200 executes detection HTML (see (3)).
Thereafter, the browser 5200 sends the result of detection HTML to the main monitoring server device 1000 (see (4)). The main monitoring server apparatus 1000 detects the characteristic of the browser 5200 from the received result and the communication log, selects a communication method according to the detected browser characteristic, and transmits HTML of the selected communication method to the browser 5200. (See (5)).

The browser 5200 that has received the HTML executes the HTML, acquires monitoring information from other monitoring server devices (2000, 3000) (see (6)), and displays it.
FIG. 6 is a diagram illustrating an operation example when the FIM method is selected as the communication method according to the detected browser characteristics.
In this example, the browser acquires the monitoring information of the monitoring server device 2000. As described above, in the FIM method, information is exchanged using a character string after the URL #, and here, the browser 5200 acquires a character string “abnormal signal line” from the monitoring server device 2000.

FIG. 12 shows an example of the HTML “json.cgi” for the own device of the JSONP method.
Here, the monitoring information can be processed by the browser by calling a function using the received data as an argument. The browser processes such response data received from each monitoring server device and displays it on the display.
Next, FIG. 7 is an example of the monitoring information list 5310 displayed on the display 5300 by the browser 5200.

Here, the monitoring information 5301 of the four facilities (110 to 113) of the monitoring server device 2000 and the monitoring information 5302 of the three facilities (210 to 212) of the monitoring server device 3000 are displayed.
Hereinafter, as an example of a monitoring system according to the present invention, a system for monitoring equipment such as an emergency light of a building will be described.

<Configuration>
The main monitoring server device 1000, the monitoring server device (2000, 3000), and the monitoring information display device (5000, 6000) constituting this system will be described.
FIG. 2 is a functional block diagram of the monitoring server device 1000, the monitoring server device 2000, and the monitoring information display device 5000 according to the present invention.

The monitoring server device 2000 and the monitoring server device 3000 have the same configuration, and only the monitoring device 2000 will be described here. The monitoring information display device 5000 and the monitoring information display device 6000 have the same configuration, and only the monitoring information display device 5000 will be described here. However, browser specifications are different.
The main monitoring server device 1000, the monitoring device 2000, and the like of this embodiment have a function of a normal facility monitoring device. However, the main monitoring server device 1000 further requests a monitoring information to be displayed from the monitoring information display device 5000. It has the function to receive.

First, the monitoring information display device 5000 includes a communication unit 5100, a browser 5200, and a display 5300.
The communication unit 5100 has a function of exchanging data with the main monitoring server device 1000 and the monitoring server device 2000 through the Internet 10.
The browser 5200 has a browser function for normal Web content, and displays monitoring information from each monitoring server device on the display 5300 as Web content. In addition, the browser characteristic is notified to the main monitoring server apparatus 1000 by executing the HTML document for detecting the browser characteristic from the main monitoring server apparatus 1000 and returning the execution result.

Next, the monitoring server device 1000 includes a communication unit 1100, a browser characteristic detection unit 1200, a communication method selection unit 1300, a Web service unit 1400, an overall HTML storage unit 1500, a detection HTML storage unit 1600, a browser characteristic storage unit 1700, and An equipment state acquisition unit 1600 is included.
First, the communication unit 1100 has a function of exchanging data with the monitoring information display device 5000 and other monitoring server devices 2000 through the Internet 10. It also has a function of taking a communication log.

The browser characteristic detection unit 1200 has a function of detecting characteristics of a browser that has requested monitoring information. The contents of the browser characteristics detected here will be described later in the section <Data>.
The browser characteristic detection unit 1200 detects the characteristic of the browser by transmitting the detection HTML to the browser and analyzing the result of the browser and the communication log of the own apparatus, that is, the main monitoring server apparatus 1000. This detection HTML is stored in the detection HTML storage unit 1600.

Further, the browser characteristic detection unit 1200 has a function of storing the detected browser characteristic in the browser characteristic storage unit 1700.
Next, the communication method selection unit 1300 selects which communication method to respond to the browser that has requested the monitoring information, in other words, the communication method in which the browser requests the monitoring information from the monitoring server device 2000 or the like. It has the function to do. In addition, the communication method selection unit 1300 also selects a connection method of whether to connect by a polling method or a continuous connection. The selection method will be described in the section <Communication method selection method> in <Operation> described later.

  The Web service unit 1400 has a function of returning a program for obtaining monitoring information displayed on the browser in response to a request from the browser. Specifically, it has a function of generating and returning HTML for batch display of monitoring information. In the present embodiment, the overall HTML for the communication method selected by the communication method selection unit 1300 is read from the overall HTML storage unit 1500 and modified to display the equipment information of the device as necessary. Send back.

  The overall HTML storage unit 1500 has a function of storing the overall HTML. The whole HTML is used to acquire monitoring information from each monitoring server device in order to perform batch display of monitoring information, and is stored for each communication method. In the present embodiment, there are four types: IMG method, JSONP method, FIM method, and PROXY method. For example, X10. HTML is HTML for the whole of the FIM system, and X20. HTML is the HTML for the entire IMG system.

The detection HTML storage unit 1600 has a function of storing detection HTML for detecting browser characteristics. In this embodiment, it is assumed that the detection HTML is stored for each communication method, and further, research.cgi is stored as CGI for sequentially calling these detection HTMLs.
The browser characteristic storage unit 1700 has a function of storing browser characteristics. This characteristic is detected by the browser characteristic detection unit 1200 and is stored by the browser characteristic detection unit 1200.

The equipment state acquisition unit 1600 has a function of acquiring the state of the equipment (110, 111) monitored by the own device.
Next, the monitoring server device 2000 will be described.
The monitoring server device 2000 includes a communication unit 2100, a web service unit 2200, an own device HTML storage unit 2300, and an equipment state acquisition unit 2400.

The communication unit 2100 has the same function as that of the communication unit 1100 of the main monitoring server device 1000 and has a function of exchanging data with the monitoring information display device 5000 and other monitoring server devices 3000 through the Internet 10.
The Web service unit 2200 has a function of returning monitoring information displayed on the browser in response to a request from the browser. Specifically, it has a function of generating data or the like for displaying monitoring information of equipment monitored by the own device. In the present embodiment, the HTML for the own device of the communication method with which the browser has communicated is read from the HTML storage unit 2300 for the own device, and if necessary, is corrected according to the state of the equipment of the own device and returned.

The own device HTML storage unit 2400 has a function of storing the own device HTML. The own device HTML is stored for each communication method.
The equipment state acquisition unit 2400 has a function of acquiring the state of the equipment (210, 211) monitored by the own device.
Here, all or a part of each processing by each unit such as the browser characteristic detecting unit 1200 is realized by a CPU (not shown) executing various programs.

<Data>
Hereinafter, main data used by the monitoring system according to the present invention will be described with reference to FIGS.
FIG. 3 is a diagram showing a configuration and example contents of the browser characteristic table 1710. This is stored in the browser characteristic storage unit 1700 in association with an ID for identifying the browser. The ID for identifying the browser is assumed to be created based on the header information of the HTTP request sent from the browser.

The browser characteristic table 1710 includes a communication method 1711, availability 1712, the number of simultaneous connections 1713, and reception order processing possible 1714.
Although there are various browser characteristics, here, it is assumed that each communication method can be used 1712, the number of simultaneous connections 1713, and reception order processable 1714.
Here, the number of simultaneous connections 1713 and the reception order processable 1714 are described for each communication method 1711. Although the actual browser characteristics are uniquely determined, in this embodiment, the browser characteristics detection HTML is executed and detected for each communication method, so the detection result is stored for each communication method. Shall be kept.

The communication method 1711 indicates a method for communicating with the monitoring server device, and the availability 1712 indicates whether the browser can use the communication method 1711. When it can be used, “Yes” is described, and when it cannot be used, “No” is described.
Next, the number of simultaneous connections 1713 indicates the maximum number that the browser 5200 can connect simultaneously. That is, it shows how many requests the browser 5200 can issue to the monitoring server device at the same time.

The reception order processing possible 1714 indicates whether or not the browser 5200 executes processing in the order in which responses are received, regardless of the order in which the requests are transmitted. If it can be executed in the order of reception, “◯” is indicated, and if it cannot be executed, “×” is indicated.
FIG. 4 shows an example of the browser characteristic table of another browser, for example, the browser 6000.

In the browser characteristic table 1750 of the browser 6000, the availability 1712 of only the “PROXY method” and the “IMG method” of the communication method 1711 is “◯”, the number of simultaneous connections 1713 is “1”, and the reception order processing possible 1714 is “○”.
<Operation>
Hereinafter, operations of the monitoring information display device 5000, the main monitoring server device 1000, the monitoring server device 2000, and the like of the monitoring system described above will be described with reference to FIGS.

FIG. 8 is a flowchart showing a process in which the monitoring information display device 5000 acquires and displays monitoring information of the main monitoring server apparatus 1000 and the monitoring server apparatus 2000, and FIG. 9 shows a process of detecting the browser characteristics. It is a flowchart to show.
First, a process in which the monitoring information display device 5000 acquires and displays monitoring information of the main monitoring server device 1000 and the monitoring server device 2000 will be described with reference to FIG.

First, the browser 5200 of the monitoring information display device 5000 transmits a monitoring information request to the main monitoring server device 1000 via the communication unit 5100 (steps S200 and S201).
The web service unit 1400 that has received the request via the communication unit 1100 determines whether or not the browser characteristics of the browser that has received the request are stored in the browser characteristic storage unit 1700 (step S110).

When the browser characteristic is not recorded (step S110: NO), the web service unit 1400 requests the browser characteristic detection unit 1200 to detect it.
Upon receiving the request, the browser characteristic detection unit 1200 reads the detection HTML from the detection HTML storage unit 1700 and transmits it to the browser 5200 of the monitoring information display device 5000 in order to perform processing for detecting the browser characteristic (step S121). ). The browser 5200 executes the received HTML (step S210) and returns the result to the browser characteristic detection unit 1200 (step S211).

The browser characteristic detection unit 1200 that has received the result detects the browser characteristic from the reception result and the communication log of its own device, and associates the detected browser characteristic with the ID for identifying the browser in the browser characteristic storage unit 1700. Store (step S120). The process for detecting the characteristics will be described with reference to FIG. 9 in the section <Browser characteristic detection method> below.
After completing the characteristic detection process, the browser characteristic detection unit 1200 notifies the Web service unit 1400 to that effect.

The web service unit 1400 that has been notified that the characteristic detection processing has been completed requests the communication method selection unit 1300 to select a communication method.
The communication method selection unit 1300 that has received the request refers to the browser characteristic table 1710 stored in the browser characteristic storage unit 1700 to select a communication method (step S130). The selection method will be described in the section <Method for selecting communication method> below.

On the other hand, when the browser characteristic is recorded (step S110: YES), the browser characteristic detection process is not performed, and the communication method is selected by referring to the browser characteristic table 1710 stored in the browser characteristic storage unit 1700. (Step S130).
The communication method selection unit 1300 that has selected the communication method notifies the Web service unit 1400 of the selected communication method, and the Web service unit 1400 that has received the notification responds to the communication method notified from the overall HTML storage unit 1500. The entire HTML is read out, and the monitoring information of the equipment of the own device is read out from the equipment status acquisition unit 1800 and added as necessary, and transmitted to the browser 5200 (steps S140 and S141).

  The browser 5200 that has received the overall HTML executes the received HTML (Step S220), requests monitoring information from each monitoring server device 2000 (Step S221), and receives the request from the Web service unit 2200 of the monitoring server device 2000. Reads out the HTML that matches the requested communication method from the HTML storage unit 2300 for the own device, reads out the monitoring information of the equipment of the own device from the equipment state acquisition unit 2400 as necessary, and sends it to the browser 5200 (Step S300, Step S301).

The browser 5200 that has acquired the monitoring information from the monitoring server device 2000 displays the monitoring information on the display 5300 (step S230).
<Communication method selection method>
Here, the communication method selection processing in this embodiment will be described. This process is a process performed by the communication method selection unit 1300. Here, one of the four methods of the IMG method, the JSONP method, the FIM method, and the PROXY method is selected as the communication method, and any one of the polling method and the persistent connection method is selected as the connection method. These selections are made based on the browser characteristic table 1710.

First, a communication method is selected based on the availability 1712 of the characteristic table 1710. It is assumed that the priority is higher in order from the top of the communication method 1711. For example, if the communication method 1721 is “JSONP” and the available 1722 is “◯”, the JSONP method is selected.
The simultaneous connection number 1713 and the reception order processable 1714 are used to determine a connection method for performing communication by a polling method or a continuous HTTP connection. The persistent HTTP connection is commonly called a Comet method, and is hereinafter referred to as a “Comet method”.

  Each of these connection methods has characteristics, and the polling method requires resources that can withstand the communication load because it is necessary to periodically poll each monitoring server device. On the other hand, the Comet method is suitable for delivering information to be notified at a low load immediately when an event occurs although it does not normally have information to be notified, but it is necessary to keep the HTTP connection open.

Since this system is intended for monitoring facilities and requires immediate notification of alarms and the like, it is desirable to connect by the Comet method.
In the present embodiment, the Comet method is selected only when the number of simultaneous connections 1713 is “2” or more and the reception order processing possible 1714 is “◯”.
The number of simultaneous connections 1713 is “2” or more. When using the Comet method, communication with other monitoring server apparatuses cannot be performed unless two or more connections can be established. Because. In the Comet method, the connection remains established. For example, when the number of simultaneous connections is “1”, communication is performed with another monitoring server device when connected to one monitoring server device using the Comet method. It will not be possible.

  Further, the reception order processable 1714 is “◯”, that is, it is necessary to be able to be executed in the reception order when the monitoring server 2000 and the monitoring server 3000 are communicating with each other by the Comet method. This is because even if an alarm is sent from the device 3000, the alarm may not be processed immediately. That is, the response of the monitoring server device 2000, for example, a case where a certain time elapses or until an alarm occurs may occur.

  For example, in the browser having the characteristics shown in FIG. 3, the availability 1712 of each of the communication methods “JSONP method”, “FIM method”, “IMG method”, and “PROXY method” of the communication method 1711 is “◯”. These four communication methods can be used. For example, the “JSONP method” can be connected by the Comet method because the number of simultaneous connections 1713 is “5” and the reception processable 1714 is “◯”.

Therefore, for the communication with the browser shown in the browser characteristic table 1710 of FIG. 3, the JSONP method is selected as the communication method and the Comet method is selected as the connection method.
FIG. 4 shows an example of the browser characteristic table of the browser 6000.
In the browser characteristic table 1750 of the browser 6000 shown in FIG. 4, only the “PROXY method” and the “IMG method” in the communication method 1711 indicate “Yes” in the availability 1712, and the number of simultaneous connections 1713 is “1”. The forward processing possible 1714 is “◯”.

That is, since the number of simultaneous connections 1713 of the usable communication methods 1711 “IMG method” and “PROXY method” is “1”, the browser cannot communicate using the Comet method, but communicates using the polling method.
Therefore, for communication with the browser shown in the browser characteristic table 1750 in FIG. 4, the IMG method is selected as the communication method, and the polling method is selected as the connection method.

In the case of connection using the Comet method, an instruction to that effect is added to HTML.
<Browser characteristic detection method>
Here, a method for detecting browser characteristics will be described with reference to FIG.
FIG. 9 is a flowchart showing processing for detecting browser characteristics.
The browser characteristic detection process is performed by the browser characteristic detection unit 1200 (see FIG. 2).

First, the browser characteristic detection unit 1200 of the main monitoring server apparatus 1000 sets an ID for identifying the browser as a cookie, and executes the detection CGI “research.cgi” stored in the detection HTML storage unit 1600. Then, the detection HTML for each communication method is transmitted to the browser 5200 (step S400).
Each detection HTML is created to send the result to research.cgi at the end with the callback function and execute the detection HTML for the next communication method, and the browser 5200 sequentially executes the detection HTML for all communication methods. To do.

  FIG. 10 shows an example of an IMG detection HTML, and FIG. 11 shows an example of a JSONP detection HTML. In the IMG detection HTML of FIG. 10, an img tag is automatically generated and requested to the main monitoring server apparatus 1000, and a callback function is executed when a response is received. Further, in the detection HTML of the JSONP method in FIG. 11, a script tag is automatically generated and requested.

Hereinafter, an example in which browser characteristics are detected by the IMG method will be described with reference to FIG. Other communication methods detect characteristics in the same procedure.
A plurality of request functions 1610 having different delay times are simultaneously executed on the IMG detection CGI program “img.cgi” (hereinafter referred to as “IMG method CGI”) stored in the main monitoring server 1000. The request function dynamically generates an IMG tag and executes a callback function when receiving a response from the monitoring server device.

  The URL of the request function is configured such that the waiting time until the execution of the IMG CGI is started (hereinafter referred to as “execution delay time”) is shortened in the order of description of the request function. The “sleep” argument of the IMG system CGI is the number of seconds of the execution delay time of the IMG system CGI, and the “data” argument is a data value returned to the browser 5200 by the IMG system CGI. Here, the data value indicates the order of the requests. In other words, the IMG CGI is created to return the content specified by the “data” argument after the time specified by the “sleep” argument. The same applies to CGI of other communication systems.

Next, in the callback function 1611, the data value received from the main monitoring server device 1000 and the reception time are stored, and after the completion of all the request functions, the result is transmitted to research.cgi and is sent to the detection HTML for the next communication method. Transition.
The browser characteristic detection unit 1200 that has acquired the execution results of detection HTML for all communication methods detects browser characteristics from these results and the like (step S410).

Specifically, based on the data value and reception time sent from the detection HTML and the reception time of the request function 1610 from the browser recorded in the communication log of the main monitoring server device 1000, the number of simultaneous connections 1713 The reception order processing possible 1714 is obtained.
That is, the number of simultaneous connections 1713 is received from the most recent request time until the minimum execution delay time of CGI, for example, 5 seconds elapses in the log of requests to the detection CGI for each communication method in the same session. The number of requests made is the number of simultaneous connections 1713.

The reception order processable 1714 extracts the reception results for the number of simultaneous connections 1713 obtained above from the ones with the most previous reception time, and the data values written in the reception contents are in ascending order. Then, it is assumed that reception order processing is possible.
If the execution result of the communication method detection HTML is recorded, the availability 1712 is set to “permitted”, and if not recorded, it is determined that the communication method cannot be used, and the availability 1712 is set to “ "No".

The browser characteristic detection unit 1200 stores the detected browser characteristic in the browser characteristic storage unit 1700 (step S420).
<Supplement>
The monitoring system according to the present invention has been described above based on the embodiment. However, this system can be partially modified, and the present invention is not limited to the above-described embodiment. That is,
(1) In the embodiment, when the number of simultaneous connections of browser characteristics is 2 or more and processing is possible in the order of reception, the Comet method is selected. Depends on the content of
(2) In the embodiment, the characteristics such as the availability of use are checked for all four communication methods. However, if it can be used after checking from the highest priority, other communication methods may not be checked. The time required for examination can be shortened, and a quick response becomes possible.

  Further, when checking whether or not the communication method can be used, it is necessary to provide a request timeout period in order to detect a failure in the monitoring server device or the browser. For example, in the detection HTML of FIGS. 10 and 11, <meta http-equiv = ”Refresh” content = ”60; URL =. When the characteristic investigation cannot be continued due to the above, the information indicating that “the communication method under investigation cannot be used” is forcibly returned to the main monitoring server device after a specified period of time, 60 seconds here. Yes.

Therefore, it is possible to shorten the communication method selection time by investigating the communication methods that can be used at the time of designing the monitoring server device and incorporating the HTML for detecting the communication method that can be used first. It becomes.
Further, even when only one communication method can be used in advance, it is of course possible to transmit the detection HTML in consideration of the case where the browser characteristics are changed.
(3) In the embodiment, when the communication method is the IMG method, the monitoring information is transmitted using the image size. However, for example, the image size may be returned using a header in the GIF image.
(4) Although the monitoring server device (2000, 3000) and the main monitoring server device 1000 have been described in the embodiment, all the monitoring server devices may have both functions. In this case, the browser can acquire all the monitoring information regardless of which monitoring server device is accessed.
(5) In the embodiment, the browser characteristic storage unit stores the browser characteristic in association with an ID capable of identifying the browser, and the identification ID is generated based on the header information of the HTTP request. An identification ID may be created by a method.

For example, when the browser requests, a unique ID is transmitted to the browser, and the main monitoring server device stores the ID and browser characteristics in association with each other. The browser sends the ID even in the next request.
This is because the header information may be deleted by a proxy or firewall that is being sent to the main monitoring server device 1000.
(6) In the embodiment, a browser characteristic is stored in the browser characteristic storage unit in association with an ID that can identify a browser, and when a request is received from the same browser as the stored ID, a characteristic detection process is performed. It is going to use the stored browser characteristics without doing. However, characteristics such as the number of simultaneous connections may differ depending not only on the browser specifications but also on the firewall and user settings, so it is not only detected at the first request but also periodically detected, for example. desirable.
(7) In the monitoring system, all or some of the components in FIG. 2 may be realized by an integrated circuit of one chip or a plurality of chips.
(8) A program for causing the CPU to execute each control process (see FIG. 8 and the like) for realizing each function of the monitoring system shown in the embodiment is recorded on a recording medium or via various communication paths. It can also be distributed and distributed. Such a recording medium includes an IC card, an optical disk, a flexible disk, a ROM, a flash memory, and the like. The distributed and distributed program is used by being stored in a memory or the like that can be read by the CPU in the device, and each function described in the embodiment is realized by the CPU executing the program.

It is a figure which shows the structural example of the monitoring system which concerns on embodiment of this invention. It is a functional block diagram of the monitoring server apparatus 1000, the monitoring server apparatus 2000, and the monitoring information display apparatus 5000 concerning this invention. It is a figure which shows the structure and content example of a browser characteristic table. It is a figure which shows the example of the content of the browser characteristic table of the browser 6000. It is the figure which showed the communication procedure of the browser 5200 and the monitoring server apparatus (1000, 2000, 3000) of this system. It is a figure which shows the operation example when a FIM system is selected as a communication system according to the detected browser characteristic. This is an example of the monitoring information list 5310 displayed on the display 5300 by the browser 5200. 7 is a flowchart illustrating processing in which the monitoring information display device 5000 acquires and displays monitoring information of the main monitoring server device 1000, the monitoring server device 2000, and the like. It is a flowchart which shows the process which detects a browser characteristic. It is a figure which shows the example of the content of the HTML for a detection of an IMG system. It is a figure which shows the example of the content of the HTML for a detection of a JSONP system. It is a figure which shows the example of the content of HTML "json.cgi" for own devices of a JSONP system.

Explanation of symbols

1000 Main monitoring server device 1100 Communication unit 1200 Browser characteristic detection unit 1300 Communication method selection unit 1400 Web service unit 1500 Overall HTML storage unit 1600 Detection HTML storage unit 1700 Browser characteristic storage unit 1710 1750 Browser characteristic table 1800 Equipment state acquisition unit 2000 3000 Monitoring server device 2100 Communication unit 2200 Web service unit 2300 HTML storage unit for own device 2400 Equipment state acquisition unit 5000 6000 Monitoring information display device 5100 Communication unit 5200 Browser 5300 Display 5310 List of monitoring information

Claims (10)

A monitoring system comprising one or more display devices having a browser and one or more server devices having a Web server function,
The server device
Characteristic detection that sends a detection program for detecting characteristics to the browser, receives the data sent as a result of the transmitted detection program being executed by the browser, and detects the characteristics of the browser based on the results Means,
When receiving a request from the browser of the display device, the characteristic detecting means detects the characteristic of the browser, and a response program for acquiring the data displayed by the browser from each server device according to the detected characteristic And a response means for selecting and transmitting to the browser. The monitoring system further includes characteristic storage means for storing the characteristics of the browser in association with an identifier based on a request from the browser,
The characteristic detection means stores the detected characteristic in the characteristic storage means,
When the response unit receives a request from the browser of the display device, and the characteristic associated with the identifier is stored in the characteristic storage unit, the response unit transmits a response program corresponding to the stored characteristic The monitoring system according to claim 1, wherein: The characteristic of the browser is the number of connections that the browser can establish simultaneously,
The response program sent by the response means to the browser establishes a persistent connection leaving at least one of the connections, and acquires data displayed by the browser from each server device. The monitoring system according to claim 1, wherein the monitoring system is a program. The detection program transmitted to the browser by the characteristic detection means is that the browser transmits a plurality of requests to the server device almost simultaneously, and the received result is a request that the server device receives from the browser. Yes,
The monitoring system according to claim 3, wherein the characteristic detection unit detects that the number of connections that can be simultaneously established, which is the characteristic of the browser, is the number of requests received from the browser within a predetermined time. . The characteristic of the browser is whether or not processing is performed in the order in which the response messages are received, regardless of the order of requests from the browser.
The monitoring system according to claim 1, wherein the response program that the response unit transmits to a browser having a characteristic of not performing processing in the received order is a program that does not perform a persistent connection. The detection program transmitted to the browser by the characteristic detection unit transmits a plurality of requests that are specified so that the browser transmits different response messages to the server device at almost the same time, and responds to the request from the server device. The response message processing order is transmitted to the server device, and the received result is the response message processing order,
The characteristic detection unit determines whether the characteristic of the browser is in the order of requests from the browser when the order in which the server device transmits a response message to the request matches the processing order of the response message as the result. The monitoring system according to claim 5, wherein the monitoring system detects that the processing is performed in the order in which the response messages are received. The response program is an HTML document;
The response program sent by the response means to the browser is a program for acquiring data to be displayed from each other server device by designating each other server device by the source designation description of the <img> tag. The monitoring system according to claim 1. The response program is an HTML document;
The response program that the response means transmits to the browser is a program that specifies a script source of another server device by a source specification description of a <script> tag and acquires data to be displayed from each other server device. The monitoring system according to claim 1, wherein: A server device used in a monitoring system including one or more server devices having a Web server function,
The one server device is
When a request is received from a browser, a detection program for detecting characteristics is transmitted to the browser, and the transmitted detection program receives a result of execution by the browser, and based on the result, the characteristics of the browser Characteristic detecting means for detecting
Response means for selecting a response program for acquiring data displayed by the browser from each server device as a response to the request from the browser according to the characteristic detected by the characteristic detection means and transmitting the response program to the browser A server apparatus comprising: A computer program for causing one server device used in a monitoring system including one or more server devices having a Web server function to perform a response process,
When a request is received from a browser, a detection program for detecting characteristics is transmitted to the browser, and the transmitted detection program receives a result of execution by the browser, and based on the result, the characteristics of the browser A characteristic detecting step for detecting
As a response to the request from the browser, a response step of selecting a response program for acquiring data displayed by the browser from each server device according to the characteristic detected in the characteristic detection step and transmitting the response program to the browser A computer program comprising:

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