JP2008140016A - Web system and display data processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Web system capable of displaying current data contents of a database by a Web browser without useless access to the database, and a display data processing method. <P>SOLUTION: In the Web system, when a request for data stored in a cache means of the Web browser together with an identifier is transmitted to a Web server 202 according to display instructing operation, whether the identifier contained in the request is matched with an identifier for data designated by the request, which is possessed by a management means of the Web server, is determined, and when the matching of identifiers is successful, a response for instructing use of cache information is transmitted to the Web browser without useless access to the database 203. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a Web system in which a Web browser acquires information from a Web server and displays the information, and a display data processing method thereof.

  FIG. 1 shows a flow from a display request operation for displaying information on the Web browser 101 to an actual display in the Web system including the Web browser 101, the Web browser 102, the Web server 103, and the database 104. Show.

  An application executed on the Web server 103 has two pages. These two pages are called page 1 and page 2. Page 1 displays information (called an item) stored in the database 104. Therefore, when displaying page 1 with the web browser 101, the web server 103 sends a data request to the database 104. In order to display page 2 on the Web browser, a data request to the database 103 is not required.

  When data 110 having four items exists in the database 103 and the user performs a display request operation 107 for information stored in the database 103, the Web browser 101 transmits a request 108 to the Web server 102. To do. When the web server 102 receives the request 108, it makes a data request 109 to the database 103, and the resulting data 111 is supplied from the database 103 to the web server 102. The Web server 102 transmits a response 112 including the data 111 to the Web browser 1. As a result, the Web browser 101 uses page 1 to display four items 113. This series of processing is referred to as processing A.

  After process A, when another user performs an operation 114 for deleting one of the four items from the Web browser 102, a delete request 115 is transmitted to the Web server 102, and the Web server 102 deletes the data. 116 is performed on the database 103, and as a result, the deleted data 117 is received and a response 118 including the data 117 is transmitted to the Web browser 102. It is assumed that the data becomes three items 119 due to the data deletion. This series of processing is referred to as processing B.

  Here, in order to display the page 2 on the Web browser 101, when a request 121 is transmitted to the Web server 102 in response to a user operation 120, a response 122 is sent from the Web server 102 to the Web browser in response thereto. 102. As a result, the display 123 of page 2 is performed on the Web browser 101. This series of processing is referred to as processing C.

After this process C, when the user performs a re-display operation 124 in the Web browser 101 and the Web browser 101 re-displays the previous display information based on the cache in the Web browser 101, four items of data 110 are displayed. Is displayed on the Web browser 101. Information that does not match the item of the data 119 of the database 103 at that time is displayed on the Web browser 101 (see Patent Document 1). This series of processing is referred to as processing D.
JP 2005-157842 A

  In the conventional Web system, there is a method of accessing the database to always match the contents of the database with the screen information of the Web browser in order to display the information previously displayed on the Web browser again. Even for a process that does not require access to the database as in the process C, the database is accessed as in the process A, and there is a problem that the process is wasted.

  Accordingly, an object of the present invention is to provide a Web system and a display data processing method capable of displaying the current data contents of a database on a Web browser without accessing a useless database.

  The Web system of the present invention acquires, from a database, a Web browser of a client terminal that displays information in response to a display command operation, and data of information that is connected to the Web browser via a network and is to be displayed on the Web browser. A cache server that stores the data about the already displayed information in association with the identifier added thereto, and a Web server that transmits to the Web browser. And a means for transmitting a request for the already-displayed information together with an identifier corresponding thereto when a display command operation for the already-displayed information is performed, and the Web server sends the request When received, whether the identifier exists in the received request A first response having acquisition data to which an identifier is created when the received request does not have an identifier and data corresponding to the received request is acquired from the database and the generated identifier is added; To the Web browser, management means for storing and managing the relationship between the created identifier and the transmitted data, and if the received request has an identifier, the identifier and the management means A discriminating unit that discriminates whether or not the identifier that is stored and managed matches; and a discriminating result of the discriminating unit that instructs the use of cache information without acquiring data from the database when the discrimination result of the discriminating unit is a match 2 Response is sent to the Web browser, and the discrimination result of the discrimination means is an identifier mismatch. Means for transmitting the first response to the web browser, and the web browser displays information according to data included in the first response when the first response is received, When the second response is received, information is displayed according to the data stored in the cache means.

  The display data processing method of the present invention includes a Web browser of a client terminal that displays information in response to a display command operation, and data of information to be displayed on the Web browser connected to the Web browser via a network. A display data processing method of a Web system comprising a Web server that acquires and transmits to a Web browser, wherein the Web browser associates data about already displayed information with an identifier added thereto When the display command operation for the displayed information is performed, the request for the displayed information is transmitted to the Web server together with the identifier corresponding thereto, and the Web server receives the request. Determine if an identifier exists in the received request If the identifier does not exist in the received request, an identifier is created, data corresponding to the received request is obtained from the database, and a first response having the obtained data to which the creation identifier is added is sent to the Web browser The relationship between the created identifier and the transmitted data is stored and managed, and if an identifier is present in the received request, the identifier and the identifier stored and managed match. When the determination result is a match of identifiers, a second response instructing the use of cache information is transmitted to the Web browser without acquiring data from the database, and the determination result does not match the identifiers If it is, the first response is transmitted to the web browser, and the web browser Then, when the first response is received, information is displayed according to the data included in the first response, and when the second response is received, the information stored in the cache unit is displayed as information. It is characterized by displaying.

  According to the present invention, when a request for data stored together with an identifier is transmitted to the cache means of the Web browser in response to the display command operation, the identifier included in the request and the management means of the Web server It is determined whether or not the identifier for the data specified by the request held by the server matches, and if the identifier matches, the use of cache information is instructed without accessing a useless database. Since the second response is transmitted to the web browser, information equivalent to the current data content of the database can be displayed on the web browser.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 2 shows a Web system according to the present invention. This Web system includes a client terminal 201, a Web server 202, and a database server 203. They are connected to a LAN (Local Area Network) line 200 so that they can communicate with each other.

  The client terminal 201 basically includes a Web browser 209 for displaying information including characters and videos using the HTML language, and a storage device 210 for storing the information. The web browser 209 includes an operation unit 205 and a page display unit 208. The operation unit 205 accepts a user operation to specify information to be displayed. The operation unit 205 is provided with a button 204 for designating redisplay of the screen information displayed immediately before, and this button is referred to as a return button of the Web browser.

  The page display unit 208 displays information as a page 207, and includes a display content confirmation processing unit 222 for displaying the page 207. The page 207 has a unique ID (identifier), which is referred to as a page ID 206. The display content confirmation processing unit 222 functions when information is displayed as the page 207. For example, there are a case where the user displays the previous screen information from the cache 211 on the Web browser 209 and a case where the user receives a response from the Web server 202 and displays the page on the Web browser 209.

  The storage device 210 stores the page displayed by the Web browser 209 as a cache 211 together with the page ID 206 and the display content confirmation processing unit 222.

  The Web server 202 executes a Web application 212 that is software, thereby forming a request reception unit 213, a response transmission unit 214, a data reception unit 215, a session management unit 216, a global object management unit 218, and a request confirmation unit 221. .

  The database server 203 forms a database 220 that stores information to be displayed in a browser such as the Web browser 209 as data in page units.

  When the Web server 202 receives a request from the client terminal 201, the Web server 202 starts processing by the Web application 212. In the processing of the Web application 212, data stored in the database 220 of the database server 203 is accessed, and display or update is instructed to the Web browser 209 of the client terminal 201 based on the processing result.

  The request receiving unit 213 receives a request from the client terminal 201. The response transmission unit 214 transmits information to be displayed on the web browser 209. The data receiving unit 215 acquires information from the database 220 of the database server 203. The session management unit 221 logically manages a series of screen transitions. The session management unit 221 performs management in session units, and stores information managed for a series of screen transitions as session unit information 217.

  The global object management unit 218 manages common data (called an object) regardless of the session unit information, and stores it as global object information 219. The request confirmation unit 221 performs processing for comparing the value stored in the global object information 219 with the value of the page ID.

  In a Web system having such a configuration, when a display request is generated from the operation unit 205 of the Web browser 209 in response to a user operation, the display content confirmation processing unit 222 starts operating and requests the Web server 202 to make a request. (Data request) is transmitted (step 301).

  When the display request is generated in response to the operation of the return button 204 described above in step S301, the display content confirmation processing unit 222 reads the page ID 206 from the cache 211 of the storage device 210 and sends it to the request. Include. The page ID 206 to be read is an ID for the page displayed immediately before the current display page in the page display unit 208.

  The request is received by the request reception unit 213 of the Web server 202, and the global object management unit 218 determines whether or not the global object 1 is stored (step 302). Here, the global object 1 is a global object assigned to the data requested by this display request. In step 302, it is determined whether or not the received request includes a page ID. If the page ID is included, the global object corresponding to the page ID is determined as the global object 1.

  If the global object 1 does not exist, the global object management unit 218 creates the global object 1 (step 303), creates a page ID, and stores it in the global object 1 (step 304). The page ID is a unique value that does not overlap. The data receiving unit 215 transmits a data request corresponding to the request received by the request receiving unit 213 to the database server 203 to acquire information from the database 220 (step 305). The response transmission unit 214 transmits a response (first response) including the acquired information to the web browser 209 (step 306a). When the page ID is not included in the received request, steps 303 to 306a are executed.

  Since the global object information has a valid period, the global object management unit 218 also deletes the global object 1 created in step 303 when the valid period has passed. Therefore, even if the global object 1 is created, if its valid period has passed, it is determined in step 302 that the global object 1 does not exist, so steps 303 to 306a are executed as described above. The global object 1 is deleted when the information in the corresponding database 220 is updated.

  If the global object management unit 218 determines in step 302 that the global object 1 exists, the request confirmation unit 221 determines the page ID value stored in the global object 1 and the request received by the request reception unit 213. A process of comparing the values of the included page IDs is performed. If the values of both page IDs do not match, the above steps 303 to 305 are executed. On the other hand, when the values of both page IDs match, the response transmission unit 214 transmits a response (second response) instructing use of information in the cache 211 to the web browser 209 (step 306b). In the response of step 306b, information is not acquired from the database 220, and the use of the information stored as the cache 211 in the storage device 210 of the Web browser 209 is instructed. That is, the information stored in the storage device 210 as the cache 211 means that the information in the requested database 220 is equal in content.

  When the web browser 209 receives the response, the web browser 209 performs display processing corresponding to the response (step 307). In the display process, when the response includes acquisition information, the acquisition information is displayed. On the other hand, if the response indicates the use of the information in the cache 211, the information stored as the cache 211 in the storage device 210 is read and the read information is displayed.

  As described above, in the Web system according to the present invention, when the return button 204 is operated, a request for data stored together with the page ID (identifier) in the cache 211 of the Web browser 209 is transmitted, and the Web The server 202 determines whether or not the page ID included in the request matches the page ID for the data specified by the request, and if the page ID matches, access to a useless database is made. Since the second response instructing the use of the cache information is transmitted to the Web browser without being performed, information equivalent to the current data content of the database 220 can be displayed on the Web browser 209.

  In the above-described embodiment, the page ID is stored as a cache in the Web browser 209, but the page ID may be included in a cookie.

  In the above-described embodiment, the operation when the return button is operated as the display command operation has been described. However, the present invention is not limited to this, and the display command operation for the data stored in the cache 211 is performed by the user. The present invention can also be applied in the case where it is broken.

It is a figure which shows the conventional display data process. It is a block diagram which shows the Example of this invention. It is a flowchart which shows operation | movement of the system of FIG.

Explanation of symbols

101, 104, 209 Web browser 102, 202 Web server 200 LAN line 201 Client terminal 203 Database server

Claims (8)

A Web browser of a client terminal that displays information in response to a display command operation, and data of information that is connected to the Web browser via a network and is to be displayed on the Web browser is acquired from a database and is sent to the Web browser A web system comprising a sending web server,
The web browser stores data about information that has already been displayed and an identifier added to the data in association with each other;
Means for transmitting a request for the displayed information together with an identifier corresponding to the request to the Web server when a display command operation is performed on the displayed information;
The Web server, upon receiving the request, means for determining whether an identifier exists in the received request;
If there is no identifier in the received request, an identifier is created, data corresponding to the received request is obtained from the database, and a first response having the obtained data with the created identifier added is sent to the Web browser. Means for transmitting;
Management means for storing and managing the relationship between the created identifier and transmitted data;
A discriminating means for discriminating whether or not the identifier and the identifier stored and managed by the managing means match if the identifier is present in the received request;
When the discrimination result of the discrimination means is coincident with the identifier, a second response instructing use of cache information is transmitted to the Web browser without obtaining data from the database, and the discrimination result of the discrimination means is the identifier Means for transmitting the first response to the web browser when they do not match,
When receiving the first response, the Web browser displays information according to the data included in the first response, and when receiving the second response, the Web browser displays the data stored in the cache unit. A Web system characterized by displaying information accordingly.   The Web system according to claim 1, wherein the identifier is added in units of pages of information to be displayed.   2. The Web system according to claim 1, wherein the display command operation for the already-displayed information is an operation for a return button of the Web browser.   The Web system according to claim 1, wherein the cache unit stores the identifier as a cache.   The Web system according to claim 1, wherein the cache unit stores the identifier as a cookie.   The Web system according to claim 1, wherein the management unit manages the identifier as a global object.   The Web system according to claim 1, wherein the management unit stores a relationship between the created identifier and transmitted data within a predetermined validity period after the identifier is created. A Web browser of a client terminal that displays information in response to a display command operation, and data of information that is connected to the Web browser via a network and is to be displayed on the Web browser is acquired from a database and is sent to the Web browser A display data processing method for a web system comprising a web server for sending,
In the Web browser, the data about the already displayed information and the identifier added thereto are stored in correspondence with each other,
When a display command operation for the displayed information is performed, a request for the displayed information is transmitted to the Web server together with an identifier corresponding thereto,
When receiving the request, the Web server determines whether an identifier exists in the received request,
If there is no identifier in the received request, an identifier is created, data corresponding to the received request is obtained from the database, and a first response having the obtained data with the created identifier added is sent to the Web browser. Send
Storing and managing the relationship between the created identifier and transmitted data;
If an identifier is present in the received request, it is determined whether the identifier matches the identifier managed and stored,
When the determination result is a match of identifiers, a second response instructing the use of cache information is transmitted to the Web browser without obtaining data from the database. When the determination result is a mismatch of identifiers, the second response is sent. 1 response is sent to the web browser,
In the web browser, when the first response is received, information is displayed according to the data included in the first response, and when the second response is received, the data stored in the cache unit is displayed. A display data processing method characterized by displaying information accordingly.

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