JP6318113B2 - Information terminal and data processing program - Google Patents

Description

  The present invention relates to an information terminal that acquires information from a server and a data processing program that realizes the processing.

  In recent years, in mobile terminals such as smartphones, a web that receives and uses information processed on a native partial execution unit executed by a processing unit in the terminal and a server side (web partial execution unit) connected via a network Processing using an application combining a browser is used.

  By using such an application, it is possible to make full use of the functions inherent to the mobile terminal by the native partial execution unit, and the native partial execution, such as causing the web partial execution unit to bear frequently updated processing. The advantages of both the part and the web part execution part can be obtained.

  FIG. 6 is a diagram for explaining the exchange of information between the mobile terminal 100 and the server 102 using an application realized by processing of the native partial execution unit and the web partial execution unit. The portable terminal 100 accesses the server 102 connected via the network 104 using the downloader 10a included in the web browser 10 realized by executing the application. The downloader 10a receives, for example, information encoded in Base64 from the server 102. Information received from the server 102 is stored and held in either the browser cache 10b accessible from the web browser 10 of the mobile terminal 100 or the storage 12a on the native 12 side. At this time, the information is received from the web browser 10 by the execution of the native partial execution unit, and the information is stored in the storage 12a. Delivery processing is realized. Information encoded by Base64 or the like is also passed between the web browser 10 and the storage 12a, and the information is stored in the encoded state in the storage 12a.

  Also, a process is known that uses the cache function of the web browser 10 to store data once acquired from the server 102 in the browser cache 10b and saves the trouble of acquiring again the data stored in the browser cache 10b. Yes.

  In Non-Patent Document 1, if the data to be acquired is stored in the cache by managing the hash value or the like that associates the last update date of the data stored in the browser cache with the version information, A technique for using data stored in a cache without acquiring the data via a network is disclosed.

  For example, in a game using an information terminal connected to a server via a network, it is used to reduce the communication load between the server and the information terminal when frequently updated character data is transmitted to the information terminal. It has been.

https://developers.google.com/speed/docs/best-practices/caching

  By the way, when the capacity of the network communication band is small, there is a possibility that a timeout may occur when transmitting / receiving asset data having a large capacity such as image data or true type font (ttf) via the network. Further, as described above, even if the browser cache or the native storage is used, the communication band may not be sufficient.

  In such a situation, a technology that enables information to be efficiently communicated between the information terminal and the server is desired.

One aspect of the present invention executes an application in which a native partial execution unit executed by a built-in processing unit and a web browser that displays information received from a server connected via a network are combined. And an execution unit capable of executing the native partial execution unit and the web browser accesses the server via the network to communicate with the native partial execution unit, and acquires information from the server. Communication means, and storage means capable of storing information acquired by the communication means, and when the asset data necessary for the display processing is stored in the storage means, When asset data is passed to the web browser and the asset data is not stored in the storage means, Acquiring the asset data from the server by the serial communication means is an information terminal, characterized in that passing the asset data acquired on the web browser.

Here, the storage means includes first storage means accessible from the web browser, and second storage means accessible from the native partial execution unit, and the first storage means and the second storage means When the asset data is stored in at least one of the above, the stored asset data is transferred to the web browser, and the asset data is stored in the first storage unit and the second storage unit If not, it is preferable to acquire the asset data from the server by the communication means and pass the acquired asset data to the web browser .

When the asset data is not stored in the first storage unit, the communication unit acquires version information of the asset data from the server, and uses the version information to store the asset data in the second storage unit. When it is determined that data is not stored, it is preferable to access the server and acquire the asset data .

In addition, it is preferable that the asset data acquired from the server is stored in the second storage unit .

Further, it is preferable that the communication unit converts the asset data acquired from the server into a data format that can be processed by the web browser .

The information terminal can be realized by the following data processing program. That is, data including an application in which a native partial execution unit executed by a processing unit in a computer terminal and a web browser that performs display processing of information received from a server connected to the computer terminal via a network are combined An execution means, which is a processing program, capable of executing the computer terminal, the native partial execution unit, and the web browser, communicates by accessing a server via a network in the native partial execution unit, Communication means capable of acquiring information from the storage means, and storage means capable of storing the information acquired by the communication means, and storing asset data required for the display processing in the storage means. The asset data being transferred to the web browser and storing If the asset data in stage is not stored, the data, wherein the acquiring the asset data from the server, be made to function the asset data acquired as an information terminal to be passed to the web browser by the communication unit It is a processing program.

  According to the present invention, by incorporating a proxy function into an application, it is possible to reduce the amount of communication between the server and the information terminal and efficiently communicate information.

It is a figure which shows the structure of the data processing system in embodiment of this invention. It is a figure which shows the functional block of the data processing system in embodiment of this invention. It is a flowchart explaining transmission / reception of the data in embodiment of this invention. It is a figure explaining switching of a page. It is a figure which shows the functional block of another example of the data processing system in embodiment of this invention. It is a figure which shows the functional block of the conventional data processing system.

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

<Overall system configuration>
FIG. 1 is a block diagram showing a schematic configuration of a data processing system according to the present embodiment. The server 202 is connected to the network 204, and the information terminal 200 is connected to the network 204. The information terminal 200 acquires necessary data from the server 202 via the network 204 and executes processing such as a game.

In the present embodiment, an example in which a game is executed on the information terminal 200 will be described. However, the scope of the present invention is not limited to this, and is updated as needed between the server 202 and the information terminal 200. Any mode that performs data communication is applicable.
<Server configuration and functions>
The server 202 is a computer and has various data processing functions, communication functions, and storage functions. The server 202 stores game logic, user data used when executing the game, and asset data.

  The asset data includes, for example, image data, moving images (animation data), character information (true type font: ttf), and the like. The asset data is not limited to these data, but the effect of the present invention becomes more prominent when the data capacity is larger than that of document data or the like.

  In general, in a social game, game logic for executing a game is basically not frequently changed, but asset data such as image data and moving images (animation data) is changed as needed. That is, asset data is changed by a developer or the like as needed, and existing asset data in the memory 20 is rewritten and updated with new asset data as needed. In order to reflect the asset data thus changed to the game being executed on the information terminal 200, it is necessary to transmit the asset data from the server 202 to the information terminal 200.

  The developer's computer may be connected to the server 202 via the network 204, but may be connected to the server 202 via another communication line such as an internal LAN or wireless communication.

  As shown in the functional block diagram of FIG. 2, the server 202 has a data update unit 22 that manages the update of data in the memory 20. That is, the data update unit 22 updates the data in the memory 20 when the update data is received. Here, this data update is basically premised on the update of asset data. Here, the asset data is stored as one file, with one image, one movie, etc. as a unit, and each file is given attribute information such as update time and file capacity in addition to the file name. Has been. That is, existing asset data and new asset data can be associated based on this attribute information. For example, when updating the asset data stored in the memory 20, the old asset data is updated with the new asset data, and the new asset data is given the same file name as the updated old asset data. The attachment is done.

  When transmitting data, the server 202 calculates a hash value for each file with respect to the transmission data, and transmits the calculated hash value together with the file.

  The data update unit 22 calculates a hash value from the file data itself and attribute information, and transmits the hash value in association with the file. The hash value may be calculated from asset data (image data, moving image data, etc.) included in the file or attribute information related thereto, but is preferably calculated from the asset data itself. That is, when the asset data is updated, the hash value calculated from the asset data itself is different from the hash value calculated from the asset data before the update, and the hash value is version information indicating the version of the asset data itself. It becomes. By comparing the hash values, it is possible to reliably grasp whether the asset data has been updated.

  Here, each time a file is updated, it is also preferable to calculate a hash value of the file and store it in the memory 20 in association with the file. In this way, when a file transmission request is generated, the already stored hash value can be transmitted. Further, the hash value of the file in the memory 20 may be calculated and updated at regular intervals, and the hash value recalculated when the file is transmitted may be updated in association with the file.

  In the present embodiment, an example is shown in which one file is processed as unit data. However, a hash value may be calculated and processed for each unit data as unit data including a plurality of files.

  In the present embodiment, the hash value is applied as the version information. However, the version information may be changed according to the changed asset data (file). For example, the version information may be a checksum, check digit, fingerprint, or the like.

  For example, the creator of the asset data connects his computer to the server 202 and rewrites the data in the memory 20 as needed. When the data update unit 22 is requested to provide data from the information terminal 200, the data update unit 22 calculates the hash value based on the unit data including the file to be transmitted, and transmits the hash value to the information terminal 200.

For example, the following API is prepared in the data update unit 22.
_Get_bundle? paths = a, b, c, d ---> {a: {hash: md5, body: base64}. . . }
When this API is called by access from the information terminal 200, the hash value md5 is calculated and used as the version information of the file a. In this way, when the file a is replaced, when the file is subsequently transmitted to the user, the hash value md5 value corresponding to the transmission data is transmitted to the information terminal 200 and stored in the information terminal 200. Is done.

<Configuration and function of information terminal>
The information terminal 200 is a terminal device including a computer such as a mobile phone, a smartphone, and a tablet. As shown in FIG. 1, in the information terminal 200, a processing unit 30 including a CPU performs basic data processing. Further, the information terminal 200 is provided with an input unit 32 and a display unit 34, and performs necessary data input and various displays. For example, the display unit 34 may be a liquid crystal or an organic EL panel, and the input unit 32 may be a touch panel provided with the display unit 34. The information terminal 200 is provided with a storage unit 36. The storage unit 36 includes a semiconductor memory, a flash memory, and the like, and stores and holds information processed by the information terminal 200 (including asset data). The storage unit 36 is used as a browser cache or a native cache described later.

  In the information terminal 200, an application is executed, and access to the server 202 via the network 204 and information processing in the information terminal 200 are performed. For example, when the user of the information terminal 200 starts a game, the URL is specified, the server 202 that is the provision destination of the game program is accessed, and an application for storing the game program is downloaded therefrom. In the present embodiment, game processing is performed by an application.

  Here, an application includes a native partial execution unit that is executed by the processing unit 30 built in the information terminal 200 and performs processing of information in the information terminal 200, and information received from the server 202 via the network 204. It functions in combination with a web browser to be processed. For example, the application is such that WebView, which is a simple web browser, is incorporated in the native partial execution unit, and a part of image display on the information terminal 200 is performed using the function of the web browser.

  The game program as an application is stored in a native cache (native storage) 38 of the storage unit 36, and the functions of the web browser 40, the proxy 42, and the downloader 44 are realized by the processing unit 30 executing the game program. The information terminal 200 communicates with the server 202 by these functions, acquires asset data such as necessary images and moving images, and advances the game while displaying them on the display unit 34.

  The proxy 42 and the downloader 44 are realized by executing a native partial execution unit of the application. As a result, the proxy 42 and the downloader 44 can use functions inherently provided in the information terminal 200. For example, functions such as a network interface unique to the information terminal 200 can be used, or processing can be performed using information available only from the native partial execution unit such as terminal information of the information terminal 200.

  The web browser 40 realizes various functions such as displaying information obtained from the server 202 via the network 204 on the display unit 34. The web browser 40 is provided with a browser cache (browser storage unit) 40a. The browser cache 40a is used for storing information used when the web browser 40 executes various processes. It is preferable to store information that is not frequently updated in the browser cache 40a.

  The information terminal 200 accesses the server 202 via the proxy 42 when receiving information from the server 202. That is, the native part included in the application is obtained both when the information necessary for the execution of the native part execution unit is obtained from the server 202 and when the information necessary for processing in the web browser 40 is obtained from the server 202. This is performed through the proxy 42 realized by the execution unit.

  The web browser 40 can store a part or all of the files stored in the native cache 38 in the browser cache 40a in order to reduce the load of display processing on the information terminal 200. The web browser 40 first checks whether or not necessary information is stored in the browser cache 40a. If the information is stored, the web browser 40 reads the information and performs processing such as display. If no information is stored in the browser cache 40a, the web browser 40 requests information from the proxy 42. The proxy 42 checks whether or not the requested information is stored in the native cache 38 before requesting information from the server 202, and if so, reads the information and passes it to the web browser 40. If the information is not stored in the native cache 38, the proxy 42 requests that information from the server 202 by the downloader 44.

  Here, as described above, the server 202 stores a file including asset data and a hash value calculated for the file in association with each other, and is requested when an asset data request is received from the information terminal 200. The hash value associated when sending a file including the asset data is added as metadata and transmitted.

  The processing unit 30 of the information terminal 200 stores the received file (asset data) and hash value in the native cache 38 as a data table or the like in association with the file name. Asset data may not be encoded by Base64 or the like, and can be handled as binary data.

<Data acquisition procedure>
Hereinafter, a process in which the information terminal 200 acquires asset data from the server 202 via the network 204 will be described with reference to the flowchart of FIG. In this embodiment, it demonstrates as what the web browser 40 accesses the server 202 for every page displayed by a game, and acquires the asset data for displaying a page.

  When a game application is executed on the information terminal 200, the information terminal 200 and the server 202 are connected via the network 204 so that information can be transmitted and received between them. Here, as shown in FIG. 4, when the transition from the state in which one page is displayed on the information terminal 200 to the display of the next page, new information is required in the web browser 40 in the web browser 40. .

  First, the web browser 40 checks whether asset data necessary for screen display or the like is stored in the browser cache 40a. The browser cache 40a stores asset data and the like that have not been updated. If necessary asset data is stored in the browser cache 40a, it is read and used.

  If the necessary asset data is not stored in the browser cache 40a, the web browser 40 requests the proxy 42 for the asset data. Information between the web browser 40 and the proxy 42 can be performed according to a hyper text transfer protocol (http).

  The proxy 42 further requests the requested asset data from the server 202 using the downloader 44 realized by the native partial execution unit.

  The server 202 associates the file name (file1, file2,...) Of the file including the requested asset data with the corresponding hash value (version information) and transmits it to the information terminal 200. For example, if file name "file1" and its associated hash value hash1, and file name "file2" and its associated hash value hash2 are included (<html> file1 hash, file2 hash, ...) Is sent.

  At this time, it is preferable to calculate the hash value of the file at the time of transmission and transmit the calculated hash value in pairs with the file name. Thereby, the hash value calculated based on the latest asset data at the time of transmission can be transmitted reliably. On the other hand, when a certain amount of time lag is allowed, a hash value is calculated in advance, the file and the hash value are stored in the memory 20 in association with each other, and the file name and the corresponding hash value are read out during transmission. You may send it. In this case, it is not necessary for the server 202 to calculate a hash value for each transmission, and the processing load on the server 202 can be reduced.

  In this way, before sending the asset data file necessary for the display of the next page, the asset data that is the main body (content) of the file is not sent, but the file name that is identification information unique to the file and its version A hash value, which is information, is transmitted. This is acquired at the proxy 42.

  The proxy 42 determines whether the same hash value as the received hash value is stored in the native cache 38. If the same hash value is stored in the determination result, it can be determined that the latest asset data is already stored in the native cache 38 for the file having the file name associated with the hash value. In this case, it is not necessary to acquire the asset data of the file from the server 202 anew. Therefore, the proxy 42 reads the asset data of the corresponding file from the native cache 38 without acquiring the corresponding file from the server 202, and passes the read asset data to the web browser 40. The web browser 40 performs processing such as image display using the received asset data.

  When determining the identity of the hash value, the identity of the file name may be determined at the same time. That is, the proxy 42 may determine whether the same file name / hash value pair as the received file name / hash value pair is stored in the native cache 38. As a result, it is possible to check the identity of the data using the hash value for the asset data of the same file specified by the file name, and to determine whether or not the asset data is the latest asset data. .

  The example of FIG. 3 shows a case where a file having the same hash value has already been registered for the file file3, and there is no file having the same hash value for the files file1 and file2. In this case, the proxy 42 transmits to the server 202 a request for acquiring only two files file 1 and file 2 using the downloader 44. In this example, a request such as _get bundle file1, file2 is sent to the server 202 using AJAX (Asynchronous JavaScript + XML).

  In response to this request, the server 202 reads the corresponding files file1, file2 from the memory 20, and transmits these files to the information terminal 200. At this time, a hash value is calculated for the read file, and the file and the corresponding hash value are set and provided to the proxy 42 of the information terminal 200. That is, the file file1 and file2 are transmitted to the proxy 42 including the hash value hash and the asset data body that is the main body (content) of the file. At this time, the asset data body may be encoded in accordance with Base64 or the like, or may be binary data that is not encoded.

  Here, it is preferable that the data updating unit 22 of the server 202 calculates a hash value at the transmission stage and transmits the hash value obtained by the calculation. As a result, the transmitted hash value becomes the hash value for the latest asset data at that time. Therefore, in the information terminal 200, it is ensured that the stored hash value corresponds to the latest version of asset data.

  On the other hand, when a certain amount of time lag is allowed, a hash value is calculated in advance, the asset data and the hash value are stored in the memory 20 in association with each other, and the hash value corresponding to the file including the asset data at the time of transmission is stored. May be read and transmitted. In this case, it is not necessary for the server 202 to calculate a hash value for each transmission, and the processing load on the server 202 can be reduced.

  The proxy 42 transfers at least the file body among the file name, the file body, and the hash value to the web browser 40. At this time, the proxy 42 may perform processing such as content conversion of the received asset data. For example, you may perform the process converted into the data format etc. which are supported by the web browser 40. Since the proxy 42 is realized by a native part, information such as the capacity of the storage unit 36 of the information terminal 200, the resolution of the screen of the display unit 34, the processing speed of the processing unit 30 of the information terminal 200, and a usable data format, etc. It is easy to obtain from the information terminal 200, and there is an advantage that processing corresponding to each information terminal 200 can be applied based on such information.

  The web browser 40 performs processing such as image display using the received asset data. The web browser 40 stores (caches) the received asset data in the browser cache 40a as necessary.

  Further, the proxy 42 stores the file name, the file body, and the hash value in the native cache 38. By performing such processing, the proxy 42 receives the storage completion of the native cache 38 and transmits a reception notification to the server 202.

  In this way, whenever the user performs a certain operation on the game using the information terminal 200, the proxy 42 (downloader 44) is used in the web browser 40 according to the application executed on the information terminal 200. Asset data can be obtained from the server 202.

  At this time, the file data necessary for displaying the page is not sent as it is from the server 202, but the file name and its hash value are sent first. Therefore, using the hash value, it is determined whether the file (file body) is stored in the native cache 38. If the file is stored, the server 202 is not requested to transmit the file body. As a result, the amount of data to be communicated can be greatly reduced, and the communication efficiency can be increased. Accordingly, only necessary data can be communicated even when the communication capacity of the network 204 is not sufficient.

  In addition, the asset data itself, which is the main body of the file, is stored in the native cache 38 accessed from the proxy 42, so that the file can be cached without worrying about the data capacity as compared with the case where only the browser cache 40a is used. Can do. Generally, the browser cache 40a accessible from the web browser 40 has a small capacity, and is not suitable for caching asset data, particularly asset data having a large capacity such as image data and true type font (ttf). On the other hand, the native cache 38 can be accessed from the proxy 42 realized by a native application, and the capacity can be set relatively freely according to the capacity of the storage unit 36 of the information terminal 200, so that image data and true type fonts can be set. It is suitable for caching asset data with a large capacity such as (ttf).

  Further, when viewed from the web browser 40, asset data can be acquired by accessing the proxy 42 in the same manner as accessing the server 202 as in the prior art. The proxy 42 is allowed to access the native cache 38, and can check whether the data stored in the native cache 38 is damaged or not independently from the web browser 40. It becomes possible.

  Furthermore, by incorporating a native partial execution unit that implements the functions of the proxy 42 and the downloader 44 into the application, the functions of the proxy 42 and the downloader 44 can be terminated when the processing by the application is completed. As a result, the processing of the proxy 42 and the downloader 44 can be terminated when the processing of the game or the like is terminated, and the resources of the information terminal 200 can be released to be used in other applications, or the information terminal 200 can be used. Battery consumption can be reduced.

  In this embodiment, an example in which asset data is requested for each display of one page has been described. However, the present invention is not limited to this, and asset data necessary for displaying a plurality of pages can be acquired at once. May be.

  In addition, if there is a means for determining that this is the first access to the game at the time of access from the information terminal 200, the data to be transmitted is converted into JSON (JavaScript Object Notation) in the first response. The hash value and data may be transferred at once.

In addition, if there is a query while the hash value is being calculated in the server 202, it may be assumed that the server 202 may return an old hash value. For example, if you use a file system-independent fingerprint for the file version,
(1) Place a new file in the preparation directory tree. (2) Calculate a hash value of the additional file. (3) When the hash value has been calculated, it may be placed in the release directory tree.

  Moreover, it is also possible to take the above-described measures as a response to the case where a plurality of files are updated indivisiblely.

  Further, in the above processing, the data stored in the browser cache 40a and the data stored in the native cache 38 may be optimized.

<Modification>
In the above embodiment, the information terminal 200 directly receives information from the server 202 via the network 204. However, the present invention is not limited to this. In this modification, the information terminal 200 receives information from the server 202 via a content delivery network (CDN) 206. The CDN 206 is a network that is efficiently and stably provided to an end user by a site management side that performs content distribution and the like, and can reduce the load on the server 202 due to access concentration or the like.

  The CDN 206 is configured to connect a plurality of servers (hereinafter referred to as cache servers) synchronized with the asset data of the server 202 and distribute access from the information terminal 200 to the cache servers. Thereby, access to the server 202 can be distributed. When accessing the site configured by the CDN 206, the information terminal 200 first accesses the server 202. However, no data is exchanged there, and the server 202 distributes access to the cache server of the CDN 206 that is closest to the information terminal 200. Subsequent accesses from the information terminal 200 are set to be performed on the distributed cache server, the response to the data request is improved, and the load on the server 202 is also reduced.

<Effect of embodiment>
Thus, in the present embodiment, the following effects can be obtained.
Since asset data that is the main body of the file can be stored in the native cache 38, there are few problems even if the capacity of the browser cache 40a is small.
The browser cache 40a is used by the web browser 40 and is difficult to control depending on the processing unit 30 and the like outside the web browser 40. In this embodiment, since the asset data stored in the native cache 38 can be used in the native partial execution unit, it is not necessary to handle the data stored in the browser cache 40a from the application, and such a problem arises. Absent. Since the data stored in the native cache 38 can be used from the web browser 40 via the proxy 42, efficient processing can be performed, and wasteful communication with the server 202 can be prevented.
-When an application such as a game is started, only the application needs to be downloaded, and no special processing such as downloading a large amount of data is required, thereby shortening the startup time.
-Even when the application is running, asset data can be updated, and the latest data at the time required by the user can be supplied.
When the processing by the application is terminated, the processing of the proxy 42 and the downloader 44 can be terminated, so that the resources of the information terminal 200 can be released and used in other applications, or the battery of the information terminal 200 can be used. Consumption can be reduced.

  10 web browser, 10a downloader, 10b browser cache, 12 native, 12a storage, 20 memory, 22 data update unit, 30 processing unit, 32 input unit, 34 display unit, 36 storage unit, 38 native cache, 40 web browser, 40a Browser cache, 42 proxy, 44 downloader, 100 mobile terminal, 102 server, 104 network, 200 information terminal, 202 server, 204 network.

Claims (4)

A native partial execution unit executed by a built-in processing unit;
A web browser for displaying information received from a server connected via a network;
Is an information terminal that executes an application in which
Execution means capable of executing the native part execution unit and the web browser are:
Communication means for accessing and communicating with a server via a network in the native part execution unit, and acquiring information from the server;
Storage means capable of storing information acquired by the communication means;
With
The storage means includes first storage means accessible from the web browser, and second storage means accessible from the native part execution unit,
When asset data necessary for the display process is stored in at least one of the first storage unit and the second storage unit, the stored asset data is passed to the web browser,
If the previous SL asset data in the first storage means is not stored, by said communication means, said acquired version information of the asset data from the server, the asset data into said second storage means using said version information When it is determined that is not stored, the information terminal is accessed to acquire the asset data by accessing the server, and pass the acquired asset data to the web browser. The information terminal according to claim 1,
An information terminal characterized in that the asset data acquired from the server is stored in the second storage means. The information terminal according to claim 1 or 2,
The information terminal characterized in that the communication means converts the asset data acquired from the server into a data format that can be processed by the web browser. A native partial execution unit executed by a processing unit in a computer terminal;
A web browser for displaying information received from a server connected to the computer terminal via a network;
A data processing program including an application in which
The computer terminal;
Execution means capable of executing the native part execution unit and the web browser are:
Communication means for accessing and communicating with a server via a network in the native part execution unit, and acquiring information from the server;
Storage means capable of storing information acquired by the communication means;
With
The storage means includes first storage means accessible from the web browser, and second storage means accessible from the native part execution unit,
When asset data necessary for the display process is stored in at least one of the first storage unit and the second storage unit, the stored asset data is passed to the web browser,
If the previous SL asset data in the first storage means is not stored, by said communication means, said acquired version information of the asset data from the server, the asset data into said second storage means using said version information A data processing program that functions as an information terminal that accesses the server to acquire the asset data and passes the acquired asset data to the web browser when it is determined that is not stored.

Images