JP2014006628A - Client device, client control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a client device, a data processing method, and a program which allow data to be passed between client applications without going through a server.SOLUTION: A direct communication control unit 12 in a data filter section 10 determines whether there is a direct communication flag, which orders the exchange of data with a client application B_50 that operates on an identical client device 1, within a transmission message that is transmitted from a browser 60 executing a client application A_40. If the flag exists, the direct communication control unit 12 passes the transmission message to the browser 60 as-is without transmitting it to a server.

Description

  The present invention relates to a client device, a client control method, and a program.

  With the spread of Internet technology in recent years, web applications are used in various situations. The web server accepts various inputs from browser software (hereinafter simply referred to as a browser) of a client device connected to the Internet, and provides content corresponding to the input. The content includes, for example, content described in various script languages (for example, JavaScript (registered trademark)) that can be executed by a browser in addition to content described in an HTML format. In this specification, content in which various script languages that can be executed by the browser are described as a client application.

  As web applications become more widespread, a plurality of client applications (for example, web pages including script languages such as JavaScript (registered trademark)) may be simultaneously executed on the same client device. In this case, a case where data is input / output between client applications is also assumed.

  Patent Document 1 discloses an aspect related to a web application linkage method.

JP 2011-22856 A

  The inventor of the present application has newly found a problem in the case where a plurality of client applications (for example, a web page including a script language such as JavaScript (registered trademark)) are simultaneously executed on the same client device. The problem will be described below.

  When a client application on a client device is executed via a browser and data is transferred to another client application on the same client device, the browser accesses a web server in a general method. Then, the data is transferred by transmitting the data from the web server to another client application. That is, it is necessary to always perform communication via the server.

  As described above, since it is necessary to always perform communication through the server, there is a problem that it is easily affected by a communication failure due to a network failure or an external factor. Furthermore, since communication is performed via a network, a security problem may occur. There is a security concern especially when transferring data such as personal information.

  The present application has been made in view of the above-described problems, and a main object thereof is to provide a client device, a data processing method, and a program that can exchange data between client applications without using a server.

One aspect of the client device according to the present invention is:
A client device having a browser for simultaneously executing a first client application and a second client application supplied from a web server,
When the first client application is executed, it is determined whether or not there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server, and the direct communication flag is set Is a direct communication control unit that delivers to the browser that executes the second client application without transmitting the transmission message to the web server,
It is what has.

One aspect of the client control method according to the present invention is as follows.
A method of controlling a client device having a browser that simultaneously executes a first client application and a second client application supplied from a web server,
When the first client application is executed, it is determined whether or not there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server, and the direct communication flag is set Passes to the browser executing the second client application without sending the send message to the web server,
Is.

One aspect of the program according to the present invention is as follows:
On the computer,
A program for simultaneously executing a first client application and a second client application supplied from a web server,
Determining whether there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server when the first client application is executed;
When the direct communication flag is set, passing the transmission message to the browser that executes the second client application without transmitting to the web server;
Is to execute.

  In the present application, it is possible to provide a client device, a client control method, and a program that can exchange data between client applications without going through a server.

1 is a block diagram showing a configuration of a client device 1 according to a first embodiment. It is a figure which shows the code example of client application_A40 concerning Embodiment 1. FIG. It is a figure which shows the code example of client application_B50 concerning Embodiment 1. FIG. It is a figure which shows the transmission message transmitted from the browser 60 concerning Embodiment 1. FIG. It is a figure which shows the conversion rule which the conversion part 13 concerning Embodiment 1 uses. It is a figure which shows the transmission message delivered to the browser 60 concerning Embodiment 1. FIG. 3 is a flowchart illustrating an operation of the client device 1 according to the first exemplary embodiment. 3 is a flowchart illustrating an operation of the client device 1 according to the first exemplary embodiment. FIG. 3 is a diagram illustrating an operation concept of the client device 1 according to the first embodiment. FIG. 3 is a diagram illustrating an operation concept of the client device 1 according to the first embodiment.

<Embodiment 1>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the client device 1 according to the present embodiment. The client device 1 includes a data filter unit 10, a network driver unit 20, a kernel unit 30, and a browser 60. Note that two client applications (client application_A 40 and client application_B 50) are executed on the client device 10 via the browser 60.

  The client device 1 may be a terminal having a general network communication function, and may be a personal computer, a mobile phone, a smartphone, a PDA (Personal Digital Assistant), or the like.

  Here, the client application_A 40 and the client application B_ 50 are executed on the client side such as the browser 60. For example, each of the client application_A 40 and the client application B_50 includes a static code written in an HTML language and a program code written in a script language (such as JavaScript (registered trademark)).

  FIG. 2 shows a code example of the client application_A40. The client application_A40 includes a code of a certain script language (A language). Here, when the code is downloaded from the web server, a specific tag (“directCommunication” in the example of FIG. 2) instructing direct communication with another client application is included. In the following description, direct communication with other client applications is referred to as direct communication. “DirectCommunication” is a tag for instructing data to be transferred to another client application, passes the execution result of the function “A-func ()” as “data-A1”, and has a numerical value “33” as “data-A2” It is prescribed to deliver. Further, “directCommunication” includes an identifier (“address = B”) of a client application that is a data transfer destination.

  Similarly, FIG. 3 shows a code example of the client application_B50. The client application_B50 includes code of a script language (B language) different from the client application_A40. In the code, contents for displaying data of data types “dataB-1” and “dataB-2” are described.

  Although the example of FIG. 1 shows an example in which two client applications are operating, the present invention is not limited to this, and the client device 1 may execute three or more client applications. In addition, the above-described tag name (“direct Communication”) and the like are merely examples, and of course, other names and other formats may be used.

  When the browser 60 includes a direct communication request tag, the browser 60 transmits a transmission message including the information of the request to a web server on the network (specifically, a server that is a distribution source of the client application A_40). An example of the transmission message is shown in FIG. The message includes a flag related to the direct communication (whether or not to perform direct communication) and delivery data when performing direct communication. In the example of FIG. 4, a flag (“flag”) indicating whether or not direct communication can be executed, a data transmission source application identifier (“A”), a data transmission destination application identifier (“B”), transmission data (“dataA−”). 1 "," data A-2 ").

  In the following description, the message (FIG. 4) is described as an XML (eXtensible Markup Language) format message. However, the transmission format is not limited to the XML format, and any message that can be interpreted by the browser 60 and the web server. It may be expressed in a format (for example, a method embedded in various HTTP methods (HTTP POST method, HTTP PUT method, etc.)).

  The network driver unit 20 executes a network management function provided by an operating system or the like. The kernel unit 30 executes system resource processing provided by the operating system.

  The data filter unit 10 includes an application (API) control unit 11, a direct communication control unit 12, an HTML conversion unit 13, and a driver interface control unit 14.

  The driver interface control unit 14 operates as an interface for data exchange between each processing unit in the data filter unit 10 and the network driver unit 20.

  The application (API) control unit 11 interprets APIs (Application Programming Interfaces) of various client applications, and extracts transmitted HTML data and HTTP messages.

  The direct communication control unit 12 verifies whether there is a flag (“direct Communication”) instructing direct communication from the transmission message (FIG. 4) from the browser 60. When the flag is present, the direct communication control unit 12 extracts a destination associated with the flag and data to be transferred. In the example of FIG. 4, the direct communication control unit 12 determines that there is a flag instructing direct communication in the message (<flag> yes </ flag>). Then, the direct communication control unit 12 extracts “data-A1” and “data-A2” as data to be transferred to the client application “B” (identifier of the client application B_50).

  The conversion unit 13 converts data to be transferred by direct communication according to the client application of the transfer destination. The conversion unit 13 converts the data according to a predetermined conversion rule. In the following description, the code of the client application A_40 that is the data transmission source is the code shown in FIG. 2, and the code of the client application B_50 that is the data transmission destination is the code shown in FIG. An example of the conversion rule used by the conversion unit 13 is shown in FIG.

  As shown in FIG. 5, the data correspondence between the client application A_40 and the client application B_50 is defined. For example, FIG. 5 describes that “dataA-1” and “dataB-1” are equal, a value obtained by multiplying “dataA-2” by 2 and “dataB-2” are equal, and the like.

  The conversion unit 13 converts the data read from the transmission message (FIG. 4) so as to be adapted to the transmission destination according to the conversion rule. An example of the message after conversion is shown in FIG. As shown in the figure, each data is converted into a message corresponding to the client application B_50. For example, “data A-1” is converted to “data B-1”, and a value obtained by multiplying “data A-2” by 2 is described as “data B-2”. The message format (XML format) shown in FIG. 6 is merely an example, and any format that can be interpreted by the browser 60 may be used.

  The browser 60 interprets the transmission message (FIG. 6) received from the direct communication control unit 12 via the conversion unit 13 and performs display processing. When the client application running on the browser 60 can be identified (for example, when the same script language is used), the conversion by the conversion unit 13 may not be performed.

  Next, the operation of the client device according to the present embodiment will be described with reference to the flowcharts of FIGS. FIG. 7 is a flowchart showing an operation during execution of the client application A_40 (direct communication transmission side).

  The browser 60 that executes the web application A_40 extracts a tag indicating a direct communication request from the code (FIG. 2) (S11). The browser 60 generates a message to be transmitted to the server that supplies the web application A_40 (S12), and sets a transmission message based on various data read from the tag indicating the direct communication request (S13). Note that when a tag for direct communication is not set, the direct communication control unit 12 does not embed a tag for direct communication request. The browser 60 transmits the message after setting (S13) (S14).

  Next, the operation of the data filter unit 10 will be described with reference to FIG. The data filter unit 10 attaches to the network driver unit 20 and waits for message reception (S21, S22). The direct communication control unit 12 extracts a direct communication tag ("direct Communication") from the transmission message (S23), and extracts a direct communication flag ("flag") tag from the tag (S24).

  If the value of the read flag for direct communication (“flag”) is “Yes”, the direct communication control unit 12 determines that the request is a direct communication request (S25: Yes). If the request is a direct communication request (S25: Yes), the conversion unit 13 converts the transmission message based on the conversion rule (FIG. 5) (S26), and delivers the converted data to the browser 60 (S27).

  When the direct communication flag ("flag") tag is not set or when "No" or the like is set in the direct communication flag ("flag") tag, the direct communication control unit 12 requests the direct communication. (S25: No). In this case, the direct communication control unit 12 delivers the transmission message to the network driver unit 20 via the driver interface control unit 14 (S28). The network driver unit 20 transmits the transmission message to the web server.

  Next, the operation concept of the client device 1 according to the present embodiment will be described with reference to the conceptual diagram of FIG. As described above, the direct communication control unit 12 in the data filter unit 10 determines whether or not the transmission message includes a flag instructing direct communication. When the flag for instructing direct communication control is included, the data filter unit 10 performs necessary conversion processing without transmitting the transmission message to the web server, and delivers the transmission message as it is to the browser 60 (FIG. 9 solid arrows).

  On the other hand, if the flag for direct communication control is not included, the data filter unit 10 transmits a transmission message to the web server via the network driver unit 20 (broken line arrow portion in FIG. 9).

  Then, the effect of the client apparatus 1 concerning this Embodiment is demonstrated. As described above, the direct communication control unit 12 determines whether or not a flag for direct communication is set in the transmission message transmitted to the web server, and when the flag is set, the direct message control unit 12 transmits the message to the web server. Is sent to the client application without communicating. This makes it possible to exchange data between client applications without going through the web server.

  Further, since client applications operating on the same client device can directly communicate with each other, the possibility of being adversely affected by network access can be reduced. The above-mentioned adverse effects include security breaches such as a network failure, communication delay due to external factors, communication interruption, data leakage, and the like.

  Further, the above-described method is realized by the data filter unit 10 provided between the browser 60 and the network driver unit 20. As a result, the above-described effects (such as data transfer without using a web server) can be realized without affecting the operating environment of the web application.

  Each process of each processing unit (the data filter unit 10, the network driver unit 20, the kernel unit 30, and the browser 60) in the client device 1 may be realized as a program that operates in an arbitrary computer. The program may be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W and semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)) are included. The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

  Finally, the outline of the present invention will be described again with reference to FIG. The direct communication control unit 12 in the data filter unit 10 is for direct communication instructing data exchange with the client application B_50 operating on the same client device 1 in a transmission message transmitted from the browser 60 that executes the client application A_40. It is determined whether there is a flag.

  When there is the flag, the direct communication control unit 12 delivers the transmission message to the browser 60 as it is without transmitting it to the server (the solid line portion in FIG. 10). Thereby, the frequency | count of communication via a web server can be reduced and the various problems (communication delay, security problem), etc. resulting from a network or a server can be avoided. Further, this configuration has high affinity (easy adaptation) to a web application realized by a general web server and browser.

DESCRIPTION OF SYMBOLS 1 Client apparatus 10 Data filter part 11 Application (API) control part 12 Direct communication control part 13 Conversion part 14 Driver interface control part 20 Network driver part 30 Kernel part 40 Client application A
50 Client application B
60 browser

Claims (9)

A client device having a browser for simultaneously executing a first client application and a second client application supplied from a web server,
When the first client application is executed, it is determined whether or not there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server, and the direct communication flag is set A client apparatus comprising: a direct communication control unit that delivers the transmission message to the browser that executes the second client application without transmitting the transmission message to the web server.   The client device according to claim 1, wherein the direct communication control unit transmits the transmission message to the web server when the direct communication flag does not exist or an invalid value is set.   When the direct communication control unit detects the direct communication flag, the conversion unit converts the data for the first application included in the transmission message into the data for the second client application according to a predetermined conversion table. The client device according to claim 1, further comprising: A method of controlling a client device having a browser that simultaneously executes a first client application and a second client application supplied from a web server,
When the first client application is executed, it is determined whether or not there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server, and the direct communication flag is set Is a client control method for delivering the transmission message to the browser executing the second client application without transmitting the transmission message to the web server.   The client control method according to claim 4, wherein when the direct communication flag does not exist or when an invalid value is set, the transmission message is transmitted to the web server.   6. The method according to claim 4, wherein when the direct communication flag is detected, the data for the first application included in the transmission message is converted into data for the second client application according to a predetermined conversion table. The client control method described. On the computer,
A program for simultaneously executing a first client application and a second client application supplied from a web server,
Determining whether there is a direct communication flag indicating data exchange with the second application in a transmission message to the web server when the first client application is executed;
When the direct communication flag is set, passing the transmission message to the browser that executes the second client application without transmitting to the web server;
A program that executes The program according to claim 7, wherein when the direct communication flag does not exist or an invalid value is set, a step of transmitting the transmission message to the web server is executed.   8. When the direct communication flag is detected, the step of converting the data for the first application included in the transmission message into data for the second client application according to a predetermined conversion table is executed. Or the program of Claim 8.

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