JPH10283235A - File management method on web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve responsiveness and to perform flexible frame linkage by performing description in the form of a script in the HTML data of a hierarchical structure screen outputted from a network (web) server to a web client. SOLUTION: When the reference of a data base is requested from the web client 3 to the web server 2, a common gateway interface 5 is activated and a data base management program 6 is activated. The data base management program 6 prepares the HTML data 12 of the screen or frame of an explorer form by the hierarchical structure information of the data base 7 and outputs them to the web client 3. Then, an HTML execution part 10 plots the hierarchical structure of the data base 7 on a display screen 8 by the explorer form based on the data 12. When a user clicks a folder or a file, the updating data of the hierarchical structure screen are prepared corresponding to contents described in a Java Script 13 and re-plotting is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for referring to a database of a server arranged on a network (Web) such as an intranet by a plurality of clients.
The present invention relates to a file management method for realizing a screen update process according to a user operation on an explorer screen indicating a hierarchical structure of a database with a small load on a server.

[0002]

2. Description of the Related Art FIG.
1 shows a configuration example of a system. In FIG. 3, 1 is a LAN
Network, 2 is a Web server, 3-1 to 3-3 are Web clients, 4 is a Web interface
5, 5 is a CGI (Common Gateway Interface), 6 is a database management program, and 7 is a database.

[0003] Web interface 4 of Web server 2
Is a client 3- in accordance with a predetermined protocol.
It receives requests from 1-3, and performs communication control for exchanging data. When the request from the client received by the Web interface 4 requires some processing, the CGI 5 starts an application that performs the processing, and transmits the processing result to the Web interface 4.
To return.

[0004] The database management program 6 is one of applications, and is started when, for example, a request from a client is a reference request for a database,
The information of the explorer type hierarchical structure screen as illustrated in FIG.
Return to CGI5 in data format. The CGI5 has changed this
The interface is passed to the interface 4, and the web interface 4 sends the request to the requesting client.

FIG. 5 shows an example of an operation sequence in such a database reference process. When a Web client makes a database reference request to a Web server, the CGI calls a database management program, and the database management program executes an explorer-type hierarchical structure screen, for example, as shown in the left frame of FIG. Creates HTML data of the tree screen of only the upper layer including the appropriate root directory and returns it to the CGI. This hierarchical structure screen is sent from the Web server to the Web client and displayed on the Web client screen. Here, when the user of the Web client clicks on a certain folder position on the hierarchical structure screen, the information on the hierarchical structure screen and the information on the click position are sent to the Web server, and the CGI of the Web server manages these information in the database management. Notify the program.

The database management program identifies the selected folder name from the information on the hierarchical structure screen and the information on the click position sent from the Web client,
The folder name is highlighted and HTML data is created for a screen with a tree expanded to show folders and files below the selected folder, or a screen expanded to another frame as shown in the right frame of FIG. Then, the data is sent to the Web client via the CGI, and the display screen is updated.

Here, when the user of the Web client clicks again on the folder previously clicked on,
The information of the currently displayed hierarchical structure screen and the information of the click position are W
It is sent to the eb server and passed to the database management program via CGI as before. The database management program determines from the passed information that the tree expansion has been canceled, returns the screen to the initial screen state, and returns
The display screen of the Web client is updated via the GI.
Thereafter, each time a user operation is performed in the same manner, the Web
The CGI of the server is activated, and the display screen is switched by the database management program.

[0008]

As described above, in the conventional embodiment, when the screen needs to be rewritten by a user operation, the CGI is always activated and the necessary HTML data is output each time. Needed. However, CGI
Is shared by a plurality of clients, so that when a database reference request occurs multiple times, the processing load increases, and the responsiveness deteriorates.

[0009] As shown in FIG. 4, in the case of cooperative display between frames, conventionally, due to the grammatical restrictions in the HTML link tag <A>, the redraw frame can be specified only by the following description. Therefore, only one target frame that can be redrawn in cooperation can be designated, and only one location can be designated in terms of timing.

<A HREF = “HTML name to be displayed”
TARGET = “frame name”> For this reason, one screen is
With a multi-frame configuration of more than one frame, redrawing cannot be performed in cooperation with three or more frames.

The present invention reduces the number of accesses to the Web server when the Web client refers to the database, improves the responsiveness by reducing the processing load, and enables more flexible frame cooperation in a multi-frame screen. It is intended to be.

[0012]

SUMMARY OF THE INVENTION According to the present invention, when a Web client refers to a database from a Web server to a Web server, the Web client can access the Web server.
On the hierarchical structure screen of the database output from the server b, small changes in the screen display such as expansion and contraction of the tree due to the user's input operation can be processed on the Web client side. , We
A script is described in HTML data of a hierarchical structure screen output from the server b to the Web client so that the Web client can interpret and execute the script. In addition, script is Java Script
By describing the object using an object-oriented language such as the t language, it is possible to activate a redrawing process of an arbitrary plurality of frames in response to occurrence of an event such as a user's click operation.

FIG. 1 shows the basic structure of the present invention in an exemplary manner. In FIG. 1, 1 is a network such as an intranet, 2 is a Web server, 3 is a Web client, 4 is a Web interface, 5 is a CGI,
6 is a database management program, 7 is a database,
8 is a display screen, 9 is a mouse, 10 is an HTML execution unit, 1
Reference numeral 1 denotes a Java Script execution unit, reference numeral 12 denotes HTML data, and reference numeral 13 denotes Java Script. FIG. 1
The elements denoted by reference numerals 1 to 7 correspond to the elements having the same reference numbers described above with reference to FIG.

1, the Web client 3 issues a database reference request to the Web server 2. In the Web server 2, the Web interface 4 activates the CGI 5, and the CGI 5 further activates the database. The management program 6 is started. The database management program 6 creates HTML data 12 of a screen or frame in an explorer format based on the hierarchical structure information (directory) of the database 7, and generates CGI 5, WGI
The data is output to the Web client 3 via the Web interface 4. In the Web client 3, the HTML execution unit 10 draws the hierarchical structure of the database 7 on the display screen 8 in the explorer format based on the HTML data 12. Here, when the user clicks an arbitrary folder or file by operating the mouse 9 on the hierarchical structure screen displayed in the explorer format, the HTML execution unit 10
Activate the Java Script execution unit 11 and execute Java
The Script execution unit 11 identifies the selected folder or file, and stores the Java
Update data of the hierarchical structure screen is created in accordance with the content described in Script 13, and redrawing is performed.

The Java Script 13 can perform change processing such as expansion and contraction of a tree within the range of the hierarchical structure information included in the HTML data 12 received by the Web client 3, and if further change is necessary, Then, the information is sent from the HTML execution unit 10 to the Web server 2 as in the related art, and the CGI 5 is activated. Also, Java is updated so that the display content is updated by linking arbitrary plural frames.
a Script can be described.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In an embodiment of the present invention, small-scale screen rewriting (expansion and contraction of a folder tree, selection and display of a file, etc.) is performed by retaining information of each element in the screen in a JavaScript. Etc.) are all Java S
In response to the output from the script, the CGI of the Web server is started only when it is necessary to rewrite a large-scale screen.

On the other hand, it is possible to freely describe processing at the time of occurrence of various events such as mouse click and data loading in JavaScript, and specifically, a link tag <A>, a body tag <BODY>, etc. As the event trigger description in the tag of
Click on values such as "lick" and "onLoad"
Specify pt description.

<A HREF =... OnClick = “
Javascript description "><BODY = ... onLoad =" Java Script
pt description >> A frame redrawing method is created in the Java Script code activated when an event occurs in this way, so that the cooperation between frames can be freely performed.

FIG. 2 shows the configuration of the Java Script function. When dynamically rewriting HTML content in Java Script, information and methods for rewriting may be erased or rewritten from others, so the frame hierarchy is divided into two layers. By arranging a control structure that is always required in the parent hierarchy and dynamic output contents that are rewritten as needed in the child hierarchy, it is possible to prevent a situation where necessary information does not exist.

More specifically, as shown in the figure, information on the current folder and file and a group of methods called when each event occurs are described in the frame of the parent hierarchy.
The frame of the child hierarchy was all discharged from those methods.

With such a configuration, when each event occurs, an appropriate HT is required depending on the type of the event.
The basic structure of frame rewriting is to generate ML data and redraw a target frame.

In FIG. 2, the folder frame dynamic output method of the parent frame performs a process of generating HTML data to be output to the folder frame with reference to the folder information. The file frame dynamic output method
A process of generating HTML data to be output to a file frame with reference to the file information is performed. The folder frame redrawing method performs a process of drawing the generated HTML data in the folder frame. The file frame redraw method converts the generated HTML data
Performs the process of drawing in the file frame. When a user performs an operation such as a mouse click on a folder frame or a file frame, the folder frame dynamic output method or the file frame dynamic output method is first activated to display the clicked folder name or file name in an inverted manner. To generate HTML data with necessary changes such as expanding and contracting a folder tree, and then invoking a folder frame redrawing method or a file frame redrawing method to generate HTML data.
A process for drawing the ML data for each required frame is performed.

[0023]

The direct effects of the configuration of the present invention described above are the following two points. Reduction of the Number of Accesses to the Server Realization of Flexible Frame Cooperation In addition, since the operation of the general-purpose application can be integrated with the operation of the Web application, the operability of the Web application can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 shows a Java Scri according to an embodiment of the present invention.
It is explanatory drawing of a pt function.

FIG. 3 is a configuration diagram of a conventional server-client system.

FIG. 4 is an explanatory diagram showing an example of a hierarchical structure screen in the explorer format.

FIG. 5 is an explanatory diagram of an operation sequence in a database reference processing example.

[Explanation of symbols]

 1: Network 2: Web server 3: Web client 4: Web interface 5: CGI 6: Database management program 7: Database 8: Display screen 9: Mouse 10: HTML execution unit 11: Java Script execution unit 12: HTML data 13: Java Script

Claims (3)

[Claims] 1. A file management method on a Web for allowing a Web client user to access a file of a database having a hierarchical structure managed by a Web server, the Web client comprising: A processing means for drawing in a hierarchical structure explorer format based on the hierarchical structure information is captured, a hierarchical structure screen in an explorer format is displayed by the hierarchical structure information of the captured database and the processing means, and the displayed hierarchical structure screen in the explorer format is displayed. Detecting the folder or file selected by the user through the input operation, changing the display of the selected folder or file, and, if necessary, changing the display content of the hierarchical structure and redrawing. File on the Web Method. 2. The method according to claim 1, wherein the hierarchical structure information of the database is described in an HTML document.
A file management method on the Web, which is described as a Java script in a TML document. 3. The file management method according to claim 1, wherein the processing unit cooperates with a plurality of frames.