JP2016170497A - Display control device, server, system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce processing time related to display processing in a device that performs screen display by a web browser.SOLUTION: Acquisition means 201 obtains display data for displaying a screen from a Web server. Reading means 202 reads, if display element data included in display data obtained by the acquisition means 201 is stored in a storage device 206 which is provided in a device where a web browser 200 operates, the data from a storage device 206 by using a path indicating a storage location of the data without transmitting an acquisition request for the data to the web server. Drawing processing means 203 performs drawing processing of a screen corresponding to the display data obtained by the acquisition means 201, by using the data read by the reading means 202.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display control device, a server, a system, and a program.

  Patent Literature 1 describes a technique for efficiently caching regardless of the type of content requested for web access. In the device described in Patent Document 1, even if the content acquired from the web server 13 is dynamic content in the caching system, the content is indicated as being cacheable by the HTTP Response header. The content is stored in a cache memory.

JP 2005-18398 A

  An object of the present invention is to reduce processing time related to display processing in an apparatus that performs screen display using a Web browser.

  The display control apparatus according to claim 1 of the present invention includes an acquisition unit that acquires display data for displaying a screen from a Web server, and display element data included in the acquired display data. If the data is stored in the storage device, the data is sent from the storage device using a path indicating the storage location of the data without transmitting an acquisition request for acquiring the data to the Web server. It has a reading means for reading, and a drawing processing means for drawing a screen corresponding to the acquired display data using the read data.

  The display control apparatus according to claim 2 of the present invention is the configuration according to claim 1, wherein base path information indicating a path for accessing a predetermined storage area from the acquired display data, Second acquisition means for acquiring relative path information indicating a relative path from the storage area, and specifying means for specifying a file path for accessing the data from the acquired base path information and relative path information And the reading means reads the data using the specified file path.

  According to a third aspect of the present invention, in the configuration according to the first or second aspect, the reading means indicates the storage location of the data when the Web server is operating in the apparatus. The data is read from the storage device using a path.

  According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, when the reading unit fails to read the data, the display unit stores the data on the Web server. An acquisition request is transmitted, and the data is acquired from the Web server.

  The server according to claim 5 of the present invention is included in the display data as a receiving means for receiving a display data acquisition request for displaying a screen from a Web browser, and as a response to the received acquisition request. Transmission means for adding the base path information corresponding to the storage location of the data of the display element to the display data and transmitting it to the Web browser.

  According to a sixth aspect of the present invention, in the configuration according to the fifth aspect, when the transmission unit is a Web browser operating in the apparatus, the transmission unit of the received acquisition request is The base path information is added to the display data and transmitted.

  A system according to claim 7 of the present invention includes a Web browser and a Web server, and the Web browser acquires the display data for displaying a screen from the Web server, and the acquired When the display element data included in the display data is stored in a storage device provided in the device on which the Web browser operates, an acquisition request for acquiring the data is transmitted to the Web server. Rather, a reading means for reading the data from the storage device using a path indicating the storage location of the data, and a drawing process of the screen corresponding to the acquired display data using the read data Drawing processing means, wherein the Web server receives a display data acquisition request for displaying a screen from the Web browser; And a transmission means for adding the base path information corresponding to the storage location of the data of the display element included in the display data to the Web browser as a response to the received acquisition request. It is characterized by that.

  According to an eighth aspect of the present invention, there is provided a program for acquiring, from a Web server, display data for displaying a screen on a computer, and display element data included in the acquired display data. If the data is stored in the storage device, the data is sent from the storage device using a path indicating the storage location of the data without transmitting an acquisition request for acquiring the data to the Web server. It is a program for executing a reading step and a step of performing a drawing process of a screen corresponding to the acquired display data using the read data.

  According to a ninth aspect of the present invention, there is provided a program for receiving, in a computer, a display data acquisition request for displaying a screen from a Web browser, and as a response to the received acquisition request, the display data. And a step of adding the base path information corresponding to the storage location of the data of the included display element to the display data and transmitting it to the Web browser.

According to the first, seventh, and eighth aspects of the present invention, in the device that displays the screen by the Web browser, the display processing is performed as compared with the case where the display element data included in the display data is acquired via the Web server. It is possible to shorten the processing time according to the above.
According to the invention which concerns on Claim 2, the data of the display element contained in the display data can be acquired without going through a Web server.
According to the third aspect of the present invention, when the Web server and the Web browser are operating on one device, display element data can be acquired without going through the Web server.
According to the fourth aspect of the present invention, the display process can be continued even when the reading of the display element data fails.
According to the inventions according to claims 5 and 9, in the device that performs screen display by the Web browser, the display element data included in the display data is related to the display processing as compared with the case of acquiring the data through the Web server. Processing time can be shortened.
According to the sixth aspect of the present invention, when the Web server and the Web browser are operating on a single device, the Web browser can acquire display element data without going through the Web server.

Schematic diagram showing the configuration of system 1 The figure which shows the function structure of the image forming apparatus 20. The figure which shows the hardware constitutions of the image forming apparatus 20 A flowchart showing an example of processing performed by the image forming apparatus 20 A flowchart showing an example of a response process to an acquisition request Diagram showing an example of display data A flowchart showing an example of base path information acquisition processing

[1] Configuration FIG. 1 is a schematic diagram illustrating a configuration of a system 1 according to the present embodiment. The system 1 includes a server 10 and an image forming apparatus 20 (an example of a display control device, an example of a server). The server 10 is a device that provides a so-called Web server function. The image forming apparatus 20 is an apparatus that provides a user with services such as copying, scanning, facsimile, and printing (output of image data to a medium). The image forming apparatus 20 performs processes such as an image forming process for forming an image on a medium and an image reading process for reading an image formed on the medium. These processes are performed when services such as copying, scanning, facsimile, and printing are provided to the user. The communication line 2 includes at least one of the Internet, a mobile communication network, a telephone line, and the like, for example. A server 10 and an image forming apparatus 20 are connected to the communication line 2.

  The image forming apparatus 20 includes a Web browser function and a Web server function. The Web browser accesses a Web server inside the image forming apparatus 20 or a Web server of an external apparatus, and displays an operation screen of the image forming apparatus 20 as HTML (HyperText Markup Language), CSS (Cascading Style Sheets), JavaScript (registered trademark). It is realized by Web technology such as. That is, the Web browser obtains data (such as data described in HTML) for displaying an operation screen from a Web server indicated by a predetermined URL (Uniform Resource Locator), analyzes this data, and displays it on the display device. Display analysis results. By an operation on a display component (button or text), a data acquisition request is transmitted to the access destination (URL) of the Web server described in the data, and file information returned from the Web server (MIME type (text / html , Text / plain, text / javascript, text / css, text / xml, image / jpeg, image / png, image / bmp, etc.)). For example, if the file information is HTML, the syntax is analyzed and displayed. If the file information is JPEG, the JPEG image is decompressed and displayed. If the file information is JavaScript, the program is analyzed and executed.

  FIG. 2 is a diagram illustrating an example of a functional configuration of the image forming apparatus 20. The image forming apparatus 20 includes a web browser 200 and a web server 250. The Web browser 200 includes an acquisition unit 201, a reading unit 202, a drawing processing unit 203, a second acquisition unit 204, and a specifying unit 205. The acquisition unit 201 acquires display data for displaying a screen from a Web server. When the display element data included in the display data acquired by the acquisition unit 201 is stored in the storage device 206 provided in the device on which the Web browser 200 operates, the reading unit 202 acquires the data. The data is read from the storage device 206 using a path indicating the storage location of the data without transmitting an acquisition request for the data to the Web server. The drawing processing unit 203 uses the data read by the reading unit 202 to perform screen drawing processing corresponding to the display data acquired by the acquiring unit 201.

  The second acquisition unit 204 includes base path information indicating a path for accessing a predetermined storage area from display data acquired by the acquisition unit 201, and relative path information indicating a relative path from the storage area. And get. The specifying unit 205 specifies a file path for accessing the data from the base path information and the relative path information acquired by the second acquiring unit 204.

  The Web server 250 includes a receiving unit 251 and a transmitting unit 252. The receiving unit 251 receives a display data acquisition request for displaying a screen from a Web browser. As a response corresponding to the acquisition request received by the receiving unit 251, the transmitting unit 252 adds base path information corresponding to the storage location of the display element data included in the display data to the display data and adds the Web data. Send to browser.

  FIG. 3 is a diagram illustrating a hardware configuration of the image forming apparatus 20. The image forming apparatus 20 includes a control module 21, a display 22, an operation panel 23, a storage device 26, a communication I / F 27, a document feeding device 28, an image reading device 29, and a printing device 30. The control module 21 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU controls each part of the image forming apparatus 20. The ROM is a non-volatile storage device that stores programs and data. The RAM is a volatile main storage device that functions as a work area when the CPU executes a program.

  The display 22 has a liquid crystal display, for example, and is controlled by the control module 21 to display an image on the display surface. The operation panel 23 includes, for example, a touch screen and keys. The operation panel 23 is used for operating the image forming apparatus 20. The storage device 26 includes a hard disk drive and the like, and is a nonvolatile auxiliary storage device that stores programs and data. The communication I / F 27 is an interface for performing communication via the communication line 2. In this example, the communication I / F 27 is an interface for performing communication with the server 10 in particular.

  The document feeder 28 includes a plurality of transport rollers and the like, and transports a document set by a user to the image reading device 29. The image reading device 29 performs an image reading process for reading an image drawn on a document using, for example, a CCD (Charge Coupled Devices) system. The image reading device 29 optically reads an image formed on a medium such as paper and supplies image data representing the read image to the control module 21. The printing apparatus 30 forms an image corresponding to the image data on a medium such as paper using, for example, an electrophotographic method. Note that the above-described methods used for image reading and image formation are examples, and other methods may be used.

  In this example, the function shown in FIG. 2 is implemented by the control module 21 executing the program stored in the storage device 26 (or ROM). The control module 21 that is executing the program, or the control module 21 and the communication I / F 27 includes an acquiring unit 201, a reading unit 202, a drawing processing unit 203, a second acquiring unit 204, a specifying unit 205, a receiving unit 251 and a transmission. This is an example of the means 252.

[2] Operation The web browser of the image forming apparatus 20 displays various screens such as an operation screen on the display 22 in accordance with a user operation. When the user performs an operation using the operation panel 23, the Web browser makes a request for acquiring display data for displaying a screen such as an operation screen in accordance with the operated content to a predetermined Web server. Send to. The display data is data described in, for example, HTML or CSS. The Web server that is the transmission destination of the acquisition request may be a Web server that operates in the image forming apparatus 20, or may be a Web server that operates on another apparatus such as the server 10.

  FIG. 4 is a flowchart showing the flow of processing by the Web browser performed by the control module 21 of the image forming apparatus 20. The processing shown in FIG. 4 is executed when the screen is displayed on the display 22 (or the screen is updated) when the power of the image forming apparatus 20 is turned on or the operation panel 23 is operated by the user. Is done. In step S201, the control module 21 acquires display data for displaying a screen from the Web server. In this example, the control module 21 transmits an HTTP request, which is a display data acquisition request, to the Web server.

When receiving the acquisition request from the Web browser, the Web server executes the processing shown in FIG. 5 and returns display data corresponding to the acquisition request to the Web browser.

  FIG. 5 is a flowchart showing a flow of response processing to an acquisition request by the Web server. In step S601, the control module 21 receives an acquisition request (HTTP request) from the Web browser. In step S602, the control module 21 acquires the address information of the transmission source of the acquisition request. In step S <b> 603, the control module 21 determines whether the received acquisition request is a request from a Web browser operating in its own device. For example, the control module 21 determines whether the request source address is a loopback address (127.0.0.1) or an IP address assigned to the image forming apparatus 20. Good.

  If the request is from the inside of the device, the control module 21 proceeds to the process of step S604. On the other hand, if the request is from the outside of the device, the control module 21 skips the processes in steps S604 and S605, and proceeds to the process in step S606.

  In step S604, the control module 21 adds base path information to the display data corresponding to the received acquisition request. In this example, an extension header “x-Base-File-Path” is used as a header for adding base path information. The base path information is information indicating a predetermined storage location corresponding to the storage location of the display element data included in the display data. In this example, the display element indicates data included in the display data, and is, for example, image data, PDF (Portable Document Format) data, or DocuWorks (registered trademark) data.

  FIG. 6 is a diagram illustrating an example of the content of display data transmitted from the Web server to the Web browser. In the example of FIG. 6, three image files “img1.jpg”, “img2.gif”, and “img3.png” are included in the display data as display elements. Also, “/ local / root” is set as base path information in the extension header of “x-Base-File-Path”.

  Returning to the description of FIG. In step S605, the control module 21 adds local content information to the display data corresponding to the received acquisition request. The local content information is information indicating the type of display element that can be acquired by the Web browser without going through the Web server. The number of local content information added may be one or plural. In this example, an extension header “x-Local-Content” is used as a header for adding local content information. In the example of FIG. 6, “* .jpg” and “* .gif” are described as “x-Local-Content”. In this example, it is indicated that the file with the extension “jpg” and the file with “gif” may be accessed using the file path without the Web browser via the Web server.

  In step S606, the control module 21 transmits display data to the Web browser. As described above, when the display data acquisition request is sent from outside the device on which the Web server operates, the Web server displays the display data without adding base path information or local content information to the header. Is sent to the requester. On the other hand, when it is determined that the request is from the inside of the device, the Web server adds the base path information and the local content information to the header of the display data and transmits it.

  Returning to the description of FIG. In step S201, the control module 21 acquires display data transmitted from the Web server as a response to the acquisition request transmitted to the Web server. In step S202, the control module 21 acquires base path information from the acquired display data.

  FIG. 7 is a flowchart showing the flow of the Web browser base path information acquisition process performed by the control module 21. In step S401, the control module 21 determines whether there is unanalyzed header information. When there is unanalyzed header information (step S401; Y), the control module 21 proceeds to the process of step S402. On the other hand, when there is no unanalyzed header information (step S402; N), the control module 21 ends the process as it is.

  In step S402, the control module 21 acquires header information. In step S403, the control module 21 determines whether the header information acquired in step S402 is base path information. In this example, “x-Base-File-Path” is an extension header indicating base path information. When the acquired header information is base path information (step S403; Y), the control module 21 proceeds to the process of step S404. On the other hand, when it is not base path information (step S403; N), the control module 21 proceeds to the process of step S404.

  In step S404, the control module 21 stores the base path information obtained by analyzing the header in the storage device 26 or a predetermined storage area of the RAM. When the display data is the example shown in FIG. 6, “/ local / root” is the base path information. When the process of step S404 is completed, the control module 21 returns to the process of step S401.

  In step S405, the control module 21 determines whether the header information acquired in step S402 is local content information. When the acquired header information is local content information (step S405; Y), the control module 21 proceeds to the process of step S406. On the other hand, when it is not local content information (step S405; N), the control module 21 returns to the process of step S401 without performing the process of step S406.

  In step S406, the control module 21 stores the local content information obtained by analyzing the header in a predetermined storage area. When the display data is the example shown in FIG. 6, “* .jpg” and “* .gif” are local content information. When the process of step S406 is completed, the control module 21 returns to the process of step S401.

  Returning to the description of FIG. When the display element includes the display element, the control module 21 directly acquires the display element data without going through the web server or the web server by the processing shown in steps S204 to S209. In the case of going through the Web server, the control module 21 (that is, the Web browser) transmits a display element data acquisition request to the Web server, and displays the display element data transmitted from the Web server as a response to the acquisition request. Receive. On the other hand, when not passing through the Web server, the control module 21 accesses the data using the file path of the data of the display element, and acquires the data by reading the data. In the following description, for convenience of description, accessing a local file by a file path without going through a Web server is referred to as “local access”.

  First, in step S203, the control module 21 determines whether there is unacquired display element data. If there is unacquired display element data, the control module 21 proceeds to the process of step S204. On the other hand, if there is no unacquired display element data, the control module 21 terminates the process.

  In step S204, the control module 21 collates display element acquisition conditions, and determines whether to acquire a display element via a Web server or not via a Web server. In this example, local content information is used as an acquisition condition. The control module 21 determines whether or not the file name of the display element matches with any of the local content information. When the display data is the example shown in FIG. 6, among the three display elements “img1.jpg”, “img2.gif”, and “img3.gif”, “img2.gif” and “img3.gif” These two files are determined to be files obtained by local access. In step S205, the control module 21 determines whether the file name of the display element matches any of the local content information. When it is determined that they match (step S205; Y), the control module 21 acquires the data of the display element without passing through the Web server. That is, if a match is found, the control module 21 proceeds to the process of step S206. On the other hand, when there is no match (step S205; N), the control module 21 proceeds to the process of step S209. In the example of FIG. 6, when the file name of the display element is “img1.jpg” or “img2.gif”, the control module 21 proceeds to the process of step S206. On the other hand, when the file name of the display element is “img3.png”, the control module 21 proceeds to the process of step S209.

  In step S206, the control module 21 specifies the file path of the display element data. In this example, the file path is specified from the base path information set in the header of the display data and the relative path of the display element data described in the display data. In this example, when the display data is as shown in FIG. 6, the file path is obtained by combining the base path information and the file name of the display element. For example, when the base path information is “/ local / root” and the file name of the display element is “img1.jpg”, the file path is “/local/root/img1.jpg”.

  In step S207, the control module 21 acquires data by accessing the data of the display element using the file path specified in step S206. When the data can be acquired (step S208; Y), the control module 21 returns to the process of step S203 and performs the acquisition process for the next display element. On the other hand, when data cannot be acquired (step S208; N), the control module 21 proceeds to the process of step S209. Examples of the case where data cannot be acquired include a case where a display element file is damaged due to some error, a case where a file is deleted, and the like.

  In step S209, the control module 21 transmits an acquisition request for acquiring display element data from the Web server to the Web server, and acquires display element data transmitted from the Web server as a response to the acquisition request. . That is, if the file type display element is not registered as local content information, or if the display element data cannot be accessed (if the display element data cannot be obtained by the file path), the control module 21 accesses a display element via a Web server as usual.

  As described above, display data and display element data included in the data are acquired. The control module 21 (Web browser) analyzes the acquired data, lays out the page data to be displayed, generates drawing data, and outputs it to the display 22. As a result, a screen corresponding to the display data is displayed on the display 22.

  By the way, when a page is loaded and displayed by a Web browser, if there are many elements constituting the page, it may take a long time to acquire from the Web server. At this time, it is conceivable to cache an element that has been accessed once, but the element that is dynamically determined each time it is accessed cannot use the cache. In addition, the cached data may be deleted when the number of elements cached in the Web browser exceeds a predetermined amount. In this case, the data must be acquired again from the Web server.

  Further, in a device that implements a UI (user interface) with a Web browser, a Web server that acquires UI data may be operating in the device. In this case, the Web browser must acquire the display element via the Web server using the HTTP protocol or the like, and overhead for acquisition is applied.

  On the other hand, in this embodiment, the overhead of the HTTP protocol is reduced and the processing time is shortened by acquiring the display element data without going through the Web server. In addition, since the display element data accessed by the file path is not cached (does not occupy the cache area), the cache memory usage is reduced compared to the case where the display element data is acquired via the Web server. Cache memory is used efficiently.

[3] Modifications The above-described embodiments are merely examples of the present invention, and may be modified as follows. Moreover, you may implement combining embodiment mentioned above and each modification shown below as needed.

(1) In the above-described embodiment, when the web browser and the web server are operating on one apparatus (image forming apparatus 20) (step S603 in FIG. 5; Y), the control module 21 (web server) Base path information and local content information are added to the header of the display data (steps S604 and S605 in FIG. 5). On the other hand, the control module 21 (Web server) may be configured not to determine whether or not to add base path information and local content information. In this case, when the display data acquisition request is received, the control module 21 (Web server) adds the base path information and the local content information to the received display data without performing the above determination process, and sends it to the Web browser. Send. In this case, the Web browser determines whether or not the transmission-side Web server is a Web server operating on the own device, and determines that local access is performed when it is determined that the Web browser is operating on the own device. May be. That is, whether or not to perform local access may be determined on the Web server side or on the Web browser side.

(2) In the above-described embodiment, whether the control module 21 obtains data using a file path without going through a Web server depends on whether the file name and local content information match. Judged. The method of determining whether to go through the Web server is not limited to this. The control module 21 may determine not to go through the Web server when the data type of the display element satisfies a predetermined condition. For example, type information indicating the type of display element data acquired without going through a Web server is stored in the storage device 26 in advance, and the control module 21 stores the type of display element data and the pre-stored type information. You may determine by comparing. In this case, the Web server does not need to add local content information as a header of display data.

(3) In the above-described embodiment, as a method for specifying the file path for accessing the data of the display element, the base path information set in the header of the display data and the relative path described in the display data And were used. The method for specifying the file path is not limited to this. For example, base path information corresponding to the storage location of the display element data is stored in the storage device 26 in advance, and the control module 21 specifies a file path using the base path information stored in the storage device 26. Also good. In this case, the Web server does not need to add base path information as a header of display data.

(4) In the above-described embodiment, the Web browser and the Web server are operated by one apparatus (image forming apparatus 20). However, the Web browser and the Web server may be operated by different apparatuses. In this case, for example, a file such as an image file is installed in a predetermined storage area of a device on which the Web browser operates, and the Web browser reads the file (display element) from the storage area so that the file passes through the Web server. You may get the file without

  In this case, a copy of at least a part of the display element data is stored in a device on which the Web browser operates, and the address of the device in which the copy is stored is registered in advance in the Web server. When the Web server receives the display data acquisition request from the Web browser, the Web server compares the address of the transmission source of the received acquisition request with a pre-registered address. Base path information and local content information are added to the header of the display data).

  The Web browser determines whether to perform local access according to the type of display element. When local access is performed, display element data is read from the storage device of the local apparatus. On the other hand, when local access is not performed, a display element acquisition request is transmitted to the Web server. In this case, when data acquisition by local access fails (step S208 in FIG. 4; N), the Web browser transmits an acquisition request to the Web server and acquires display element data from the Web server. As a result, for example, when a copy of the data of the display element is damaged due to some error, or when the copy of the data is deleted, even if the data cannot be obtained, the Web server operating on the external device Display element data is acquired and screen display is performed.

(5) In the above-described embodiment, the control module 21 directly accesses the data of the display element using the file path of the display element. In the case of a Web browser provided with a function for accessing a local file, the Web browser may use the function to access display element data.

(6) In the above-described embodiment, the display data for displaying a screen such as an operation screen is exemplified as the data acquired by the Web browser from the Web server. However, the data acquired by the Web browser from the Web server is illustrated here. Not limited. The data acquired by the Web browser from the Web server may be data including one or more elements.

(7) The image forming apparatus 20 may be a printer that forms an image by a method other than the electrophotographic method. The image forming apparatus 20 may form a black and white image or may form a color image.

(8) In the above-described embodiment, the program executed by the control module 21 of the image forming apparatus 20 may be downloaded via a communication line such as the Internet. The program is provided in a state of being recorded on a computer-readable recording medium such as a magnetic recording medium (magnetic tape, magnetic disk, etc.), an optical recording medium (optical disk, etc.), a magneto-optical recording medium, or a semiconductor memory. May be.

DESCRIPTION OF SYMBOLS 1 ... System, 2 ... Communication line, 10 ... Server, 20 ... Image forming apparatus, 21 ... Control module, 22 ... Display, 23 ... Operation panel, 26 ... Storage device, 27 ... Communication I / F, 28 ... Document feeder , 29 ... Image reading device, 30 ... Printing device, 201 ... Acquisition means, 202 ... Reading means, 203 ... Drawing processing means, 204 ... Second acquisition means, 205 ... Identification means, 251 ... Reception means 251, 252 ... Transmission means

Claims (9)

Obtaining means for obtaining display data for displaying a screen from a Web server;
When the display element data included in the acquired display data is stored in a storage device provided in the apparatus, without acquiring an acquisition request for acquiring the data to the Web server, Reading means for reading the data from the storage device using a path indicating the storage location of the data;
A display control apparatus comprising: a drawing processing unit that performs drawing processing of a screen corresponding to the acquired display data using the read data. Second acquisition means for acquiring base path information indicating a path for accessing a predetermined storage area and relative path information indicating a relative path from the storage area, from the acquired display data;
A specifying means for specifying a file path for accessing the data from the acquired base path information and relative path information;
The display control apparatus according to claim 1, wherein the reading unit reads the data using the specified file path. The display control device according to claim 1, wherein the reading unit reads the data from the storage device using a path indicating a storage location of the data when the Web server is operating in the device. The display according to any one of claims 1 to 3, wherein when the reading of the data fails, the reading unit transmits the data acquisition request to the Web server and acquires the data from the Web server. Control device. Receiving means for receiving a display data acquisition request for displaying a screen from a web browser;
As a response to the received acquisition request, transmission means for adding base path information corresponding to the storage location of the data of the display element included in the display data to the display data and transmitting it to the Web browser. server. The transmission unit adds the base path information to the display data and transmits when the transmission source of the received acquisition request is a Web browser operating in the apparatus. Server. A web browser and a web server;
The web browser
Acquisition means for acquiring display data for displaying a screen from the Web server;
When the display element data included in the acquired display data is stored in a storage device provided in a device on which the Web browser operates, an acquisition request for acquiring the data is sent to the Web server. Reading means for reading the data from the storage device using a path indicating the storage location of the data without transmitting the data;
Drawing processing means for performing drawing processing of a screen corresponding to the acquired display data using the read data;
The web server
Receiving means for receiving a display data acquisition request for displaying a screen from the Web browser;
As a response to the received acquisition request, transmission means for adding base path information corresponding to the storage location of the data of the display element included in the display data to the display data and transmitting it to the Web browser. system. On the computer,
Obtaining display data for displaying a screen from a web server;
When the data of the display element included in the acquired display data is stored in a storage device provided in the computer, without transmitting an acquisition request for acquiring the data to the Web server, Reading the data from the storage device using a path indicating the storage location of the data;
Performing a drawing process of a screen corresponding to the acquired display data using the read data. On the computer,
Receiving a display data acquisition request for displaying a screen from a web browser;
In response to the received acquisition request, the step of adding base path information corresponding to the storage location of the data of the display element included in the display data to the display data and transmitting it to the Web browser is executed. Program for.

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