JP2017022640A - Service system, server device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a service system with an enhanced information security level while corresponding to the diversification of customer needs in unified communication.SOLUTION: An information terminal 2 includes: a main control section 21a; a connection destination information registration section 21b for registering the server information of a connection destination; an authentication request section 21c; a display section 24; and a display control section 21d for controlling the displaying. A server device 1 includes: an authentication section 11b for receiving an authentication request so as to perform authentication; a function change section 11c for changing a function performable in the information terminal 2 on the basis of an authentication result; and a main control section 11a for transmitting HTML data to the information terminal 2 and urging the information terminal to perform predetermined displaying. In the information terminal 2, the main control section 21a reads the Web application of HTML5 and performs the application after the performance of a native application, so that the display control section 21d controls the display section 24 to display an image based on the HTML data.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a service system, a server device, and a program for facilitating unified communication.

  In recent years, the unified communications (UC) market has expanded to large corporations, but business phones, in-house personal computers (PCs), and mobile terminals are linked to small and medium-sized companies. Is expected to expand in the future.

  A service system for providing such a UC environment is to provide not only voice communication but also various UC services (messages and mails) to various devices such as smartphones and PCs to realize efficient communication. Is required.

  In order to meet the diversified customer needs for UC, it is desired to provide a flexible graphical user interface (GUI) screen. Furthermore, in the UC environment, in order to centrally manage and browse various types of information, it is required more than ever to prevent information leakage and enhance the security of information transmission / reception.

  For example, Patent Document 1 discloses a technique in which an encryption server in an organization encrypts mail outside the organization and transmits the information to the outside as an example of enhancing the security of such information transmission / reception.

JP 2008-242769 A

  However, what is disclosed in Patent Document 1 does not correspond to the case of using the cloud mail service, and does not correspond to the UC environment.

  Thus, conventionally, there has been no service system that responds to diversifying customer needs in the UC environment and raises the security level.

  The present invention has been made in view of such problems, and an object thereof is to increase the security level of information while enabling screen display corresponding to diversification of customer needs in a UC environment.

  In order to solve the above-described problem, a service system according to a first aspect of the present invention is a service system including an information terminal and a server device, and the information terminal includes a main control unit and connection destination server information. A connection destination information registration unit to be registered; an authentication request unit that requests authentication of the connection destination server device; a display unit that displays at least an image; and a display control unit that controls display by the display unit. The server device receives an authentication request from the information terminal, performs authentication, a function change unit that changes a function that can be executed by the information terminal based on an authentication result, and the information terminal A server main control unit that transmits HTML data and prompts a predetermined display, and in the information terminal, the main control unit executes HTML5 after executing the native application program. By reading and executing the Web application program, the display control unit controls to perform display of an image based on the HTML data on the display unit.

  The server device according to the second aspect of the present invention is a server device that can communicate with an information terminal, and receives an authentication request from the information terminal to perform authentication, and based on an authentication result. A function changing unit that changes a function that can be executed by the information terminal; and a server main control unit that transmits HTML data to the information terminal and prompts the information terminal to perform a predetermined display. After the execution of the native application program, an HTML5 Web application program is read and executed to prompt the user to display an image based on the HTML data.

  Furthermore, the program according to the third aspect of the present invention is a program executed by an information terminal that can communicate with a server device, wherein the information terminal registers connection destination server information, An authentication request unit that requests authentication to the connection destination server device, a display control unit that controls display by a display unit, and the display control unit that controls the display unit to display an image based on the HTML data. It functions as a main control unit and has a hybrid configuration including a native application program and an HTML5 Web application program.

  Still further, the service system according to the fourth aspect of the present invention is a service system comprising an information terminal and a server device, wherein the information terminal requests the main control unit and the server device to view a mail. A mail browsing request unit, a display unit that displays at least an image, and a display control unit that controls display by the display unit, wherein the server device receives a mail browsing request from the information terminal and receives a cloud A service function unit that receives a mail from a mail server; and a server main control unit that prompts the information terminal to transmit HTML data related to the mail and to perform a predetermined display. The main control unit reads out and executes the HTML5 Web application program after executing the native application program. Controls to the display control unit displays an image based on the HTML data on the display unit.

  And the server apparatus which concerns on the 5th aspect of this invention is a server apparatus which can communicate with an information terminal and a cloud mail server, Comprising: The mail browsing request from the said information terminal is received, A mail is received from a cloud mail server. A service function unit and a server main control unit that transmits HTML data related to the mail to the information terminal and prompts the information terminal to perform a predetermined display; after executing the native application program in the information terminal, the HTML5 The Web application program is read and executed, and prompts the user to display an image based on the HTML data.

  Furthermore, the program according to the sixth aspect of the present invention is a program executed by an information terminal capable of communicating with a server device, wherein the information terminal requests the server device to view a mail. A display control unit that controls display by the display unit, and a display control unit that functions as a main control unit that controls the display unit to display an image based on the HTML data. And an HTML5 Web application program.

  According to the present invention, it is possible to provide a service system, a server device, and a program in which a security level of information is increased while enabling screen display corresponding to diversification of customer needs in a UC environment.

  More specifically, according to the present invention, the display mode of the GUI screen can be changed by the connection destination server device.

  Furthermore, when using a cloud-type mail service on a mobile terminal, data is received and displayed in HTML format from the server device so that no mail information remains on the mobile terminal itself, thereby preventing information leakage. Can be achieved.

It is a block diagram of the service system which concerns on 1st Embodiment of this invention. It is a block diagram of the server apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the various functions of the service function part of a server apparatus. It is a block diagram of the information terminal which concerns on 1st Embodiment of this invention. It is a figure explaining the characteristic of the service system which concerns on 1st Embodiment of this invention. It is a flowchart which shows the process sequence of the service system which concerns on 1st Embodiment of this invention. It is a block diagram of the information terminal which concerns on 2nd Embodiment of this invention. It is a figure explaining the characteristic of the service system which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the service system which concerns on 2nd Embodiment of this invention.

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

<First Embodiment>
Next, a first embodiment of the present invention will be described.

  FIG. 1 shows and describes the configuration of a service system according to the first embodiment of the present invention. As shown in the figure, the service system is configured such that server apparatuses 1a and 1b (hereinafter, collectively referred to as reference numeral 1) and an information terminal 2 are communicably connected via a network 4. . The server device 1 is connected via a network 4 to a cloud mail server 3 that provides a cloud mail service. The information terminal 2 conceptually includes, for example, a smartphone, a mobile phone, a tablet terminal, a personal computer such as a notebook personal computer, and a PDA (Personal Digital Assistant).

  In such a configuration, in the service system, the screen displayed on the information terminal 2 is changed according to the server information of the connection destination server apparatuses 1a and 1b. Here, the server information includes a URL (Uniform Resource Locator) of the server device 1 and an IP address.

  When the program executed on the information terminal 2 side is configured as an HTML5 hybrid application, the logical structure is such that a browser engine is loaded in the native application. That is, the relationship between the native API and HTML5 is such that the native application executes display by appropriately reading out the HTML5 Web application by callback. The GUI is an HTML5 hybrid application program created in HTML5.

  FIG. 2 shows an example of the configuration of the server device 1 in the service system according to the first embodiment of the present invention in more detail and will be described. As shown in the figure, the server device 1 includes a control unit 11 that controls the entire system. And the control part 11 is connected with the communication part 12, cloud telephone directory DB13, user management DB14, and the memory | storage part 15 so that communication is possible.

  And the control part 11 functions as the main control part 11a, the authentication part 11b, the function change part 11c, the screen generation part 11d, and the service function part 11e by reading and executing the control program of the memory | storage part 15. FIG. The cloud phone book DB 13 may be managed by a physically separate server device.

  In such a configuration, the communication unit 12 is an interface for performing communication with the information terminal 2 and the cloud mail server 3. The cloud phone book DB 13 is a DB that manages the cloud phone book. Here, the cloud phone book is a comprehensive phone book of the user of the service system, and the user can appropriately browse from the information terminal 2. The user management DB 14 is a DB that manages personal information, authentication information, telephone history information, and the like of users of the service system. The storage unit 15 includes a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disc Drive), and the like, stores a control program, and provides a work area when the program is executed.

  The main control unit 11a controls communication with the information terminal 2 via the communication unit 12 and performs overall control. Upon receiving an authentication request from the information terminal 2, the authentication unit 11b refers to the user management DB 14 and performs authentication. In authentication, the ID and password sent from the information terminal 2 are compared with the ID and password stored in the user management DB 14. The function change part 11c changes the function which can be performed with the information terminal 2 based on the result of the authentication by the authentication part 11b. The screen generator 11 d generates HTML data to be transmitted to the information terminal 2. The main control unit 11a urges the information terminal 2 to transmit HTML data and perform a predetermined display.

  The service function unit 11e provides various functions to the information terminal 2. Details of each function of the service function unit 11e are as shown in FIG.

  The cloud phone book function 100 a stores phone book information in the cloud phone book DB 13 so that it can be viewed and edited from the information terminal 2. The outgoing call control function 100b receives a click / tap of telephone number information displayed on the information terminal 2 so that various outgoing call control functions such as callback transmission can be executed. The incoming call control function 100c can notify the information terminal 2 of an incoming call to the call control device in the office, and a call that is transferred from the call control device and arrives at the information terminal 2 is received as an incoming call from the caller instead of the call control device. The information can be displayed on the information terminal 2. The external mail service cooperation function 100d allows the information terminal 2 to view, create, and edit mail in cooperation with the cloud mail server 3.

  The talk function 100e enables messages to be exchanged between users of the same tenant through the information terminal 2. The business card management function 100 f transmits the business card image data from the information terminal 2 to the server device 1 so that the business card management function 100 f can manage and browse the data in the cloud phone book DB 13 in association with the business card image. Then, the user position information management function 100g registers the user position information (destination information and current position information) through the information terminal 2 so that the current position information can be browsed together with the destination information and the map between the users.

  FIG. 4 shows and describes a detailed configuration example of the information terminal 2 in the service system according to the first embodiment of the present invention. As shown in the figure, a control unit 21 is in charge of overall control. The control unit 21 is communicably connected to the communication unit 22, the operation unit 23, the display unit 24, and the storage unit 25. The operation unit 23 and the display unit 24 may be integrated as a touch panel. The control unit 21 reads and executes the native application program 26 in the storage unit 25, thereby functioning as the main control unit 21a, the connection destination information registration unit 21b, and the authentication request unit 21c, and further reads out the HTML5 Web application program 27. By executing, it functions as the HTML5 display control unit 21d.

  In such a configuration, the communication unit 22 is an interface for performing communication with the server device 1 and the like. When the operation unit 23 and the display unit 24 are integrated and configured as a touch panel, an operation input is performed by tapping the button position while referring to the screen of the display unit 24. The storage unit 25 includes a RAM, a ROM, an HDD, and the like, stores a native application program 26 and an HTML5 Web application program 27, and provides a work area when the program is executed.

  The main control unit 21 a performs overall control including communication via the communication unit 22. The connection destination information registration unit 21b is for registering server information of the connection destination server devices 1a, 1b,. As the server information, the URLs and IP addresses of the server apparatuses 1a and 1b are input according to the input screen display or the like. The authentication request unit 21c requests predetermined authentication from the connection destination server devices 1a and 1b. The HTML5 display control unit 21d controls the display unit 24 to perform display based on the HTML data sent from the server apparatus 1 under the HTTP or HTTPS protocol. After executing the native application program 26, the main control unit 21a reads and executes the HTML5 Web application program 27, whereby the HTML5 display control unit 21d controls the display unit 24 to display an image based on the HTML data.

  As described above, when the execution program on the information terminal 2 side is composed of an HTML5 hybrid application, the logical structure is such that a browser engine is loaded in the native application program. The relationship between the native API and HTML5 is a relationship in which the native application program executes display by appropriately reading out the HTML5 Web application program by callback.

  FIG. 5 conceptually illustrates and describes the concept of function change by the server device 1. In the service system, when the server information of the connection destination server apparatuses 1a and 1b is set on the information terminal 2 side, the function is changed based on the server information. That is, after the connection destination is set, the set server devices 1a and 1b authenticate the information terminal 2 and change the function based on the authentication result. Then, in order to reflect the changed function on the information terminal 2 side, HTML data is transmitted to prompt the user to display an HTML screen. In FIG. 5, what is indicated by a broken line frame on the screen of the information terminal 2 is an execution screen by the HTML5 Web application. Such an execution screen is displayed based on the HTML data from the connection destination server apparatuses 1a and 1b.

  Hereinafter, the processing procedure by the service system according to the first embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

  When the process is started, in the information terminal 2, the connection destination information registration unit 21b accepts a connection destination setting (S1). At this time, a predetermined input screen is displayed on the display unit 24, and the URLs or IP addresses of the server apparatuses 1a, 1b,. Subsequently, in the information terminal 2, the authentication request unit 21c makes an authentication request to the connection destination server device 1 (S2). At this time, a predetermined input screen is displayed on the display unit 24, and an ID and a password are input.

  In the server device 1, the authentication unit 11b performs authentication in response to the authentication request from the information terminal 2 (S3). Then, the function changing unit 11c changes the function in response to the authentication result (S4), and the screen generating unit 11d generates HTML data corresponding to the function and performs communication under the control of the main control unit 11a. It transmits to the information terminal 2 side via the part 12 (S5).

  In the information terminal 2, the HTML5 display control unit 21d performs screen display based on the HTML data (S6). The situation is as shown in FIG. 5, for example. That is, operation buttons for specifying various service functions are displayed. At this time, the native application program executes display by appropriately reading out the HTML5 Web application program by callback. When a button related to a desired service function is selected from this screen (Yes in S7), the main control unit 21a transmits a service function execution request to the server device 1 (S8).

  In the server device 1, when the communication unit 12 receives this service function execution request (S9), the service function unit 11e executes the requested service (S10), and the screen generation unit 11d performs HTML data corresponding to the function. Is generated (S11), and HTML data is transmitted via the communication unit 12 under the control of the main control unit 11a (S12).

  In the information terminal 2, when the communication unit 22 receives the HTML data (S13), the HTML5 display control unit 21d displays a screen related to the service function based on the HTML data (S14). At this time, the native application program executes display by appropriately reading out the HTML5 Web application program by callback. For example, when the external mail service cooperation function is selected as the service function, an image related to an electronic mail may be displayed.

  Thus, the main control unit 21a determines whether or not to end the operation (S15). If the operation is not ended (No in S15), the process returns to step S7 and repeats the above processing. On the other hand, when ending the operation (Yes in S15), the series of processes is ended.

  As described above, in the first embodiment of the present invention, a service system including the information terminal 2 and the server device 1 is provided. The information terminal 2 includes a main control unit 21a, a connection destination information registration unit 21b that registers connection destination server information, an authentication request unit 21c that requests authentication from the connection destination server device 1, and a display that displays at least an image. And an HTML5 display control unit 21d for controlling display by the display unit 24. The server apparatus 1 receives an authentication request from the information terminal 2 and authenticates the authentication unit 11b, a function change unit 11c that changes a function that can be executed by the information terminal 2 based on the authentication result, and the information terminal 2. And a main control unit 11a that transmits HTML data and prompts a predetermined display. In the information terminal 2, the main control unit 21a reads out and executes the HTML5 Web application program 27 after executing the native application program 26, so that the HTML5 display control unit 21d displays the image based on the HTML data on the display unit 24. Control to display. Here, the HTML data is data relating to the operation screen and differs depending on the server information of the connection destination.

  Furthermore, in 1st Embodiment of this invention, the server apparatus 1 which can communicate with the information terminal 2 is provided. The server device 1 includes an authentication unit 11b that performs authentication in response to an authentication request from the information terminal 2, a function change unit 11c that changes a function that can be executed by the information terminal 2 based on the authentication result, and the information terminal 2. A main control unit 11a that transmits HTML data and prompts a predetermined display, and after the native application program 26 is executed on the information terminal 2 side, the HTML5 Web application program 27 is read and executed. And urging the user to display an image based on the HTML data.

  And in 1st Embodiment of this invention, the program run with the information terminal 2 which can communicate with the server apparatus 1 is provided. According to this program, the information terminal 2 connects to the connection destination information registration unit 21b for registering the connection destination server information, the authentication request unit 21c for requesting authentication from the connection destination server device, and the HTML 5 for controlling the display by the display unit 24. The display control unit 21d and the HTML5 display control unit 21d function as a main control unit 21a that controls the display unit 24 to display an image based on HTML data. The native application program 26 and the HTML5 Web A hybrid program composed of application programs 27 is provided.

  Therefore, according to the first embodiment of the present invention, the information terminal side mounts a hybrid application having the Web application function of HTML5, and flexibly changes the GUI design such as the operation screen by the connection destination server device. Is possible.

Second Embodiment
Next, a second embodiment of the present invention will be described.

  Since the configuration of the service system according to the second embodiment is the same as the configuration shown in FIG. 1, the duplicate description is omitted. In the service system according to the second embodiment, when the server device 1 receives an email browsing request from the information terminal 2, a cloud mail server is used according to the SMTP (Simple Mail Transfer Protocol) or IMAP (Internet Message Access Protocol) protocol. E-mail is acquired from 3. And the server apparatus 1 produces | generates HTML data, and transmits to the information terminal 2 by protocols, such as HTTP (Hyper Text Transfer Protocol) or HTTPS (HTTP over SSL / TLS). In HTTPS, since the HTTP used for data transfer is encrypted with SSL (Secure Sockets Layer) or TLS (Transport Layer Security), the security level of transmission and reception is further increased. In the information terminal 2, an electronic mail is displayed as an image based on the HTML data and can be browsed. Details thereof will be described later. It should be noted that the present invention is not limited to the cloud mail server 3, and it is of course possible to exchange with a general mail server that is installed in the company and supports SMTP and IMAP.

  The configuration of the server device of the service system according to the second embodiment is the same as the configuration shown in FIG. The external mail service cooperation function 100d of the service function unit 11e is closely related to the present embodiment.

  In FIG. 7, the detailed structure of the information terminal 2 in the service system which concerns on 2nd Embodiment of this invention is shown and demonstrated. Here, the same components as those in FIG. 4 are denoted by the same reference numerals, and redundant description is omitted. The difference from FIG. 4 is that the control unit 21 also functions as the mail browsing request unit 21 e by executing the native application program 26.

  In such a configuration, in the information terminal 2, when the mail browsing request unit 21 e requests the server device 1 to browse the mail, in the server device 1, the service function unit 11 e receives a mail browsing request from the information terminal 2. A mail is received from the cloud mail server 3. Then, the screen generation unit 11d generates HTML data of the mail, and prompts to transmit the HTML data related to the mail and perform a predetermined display using the HTTP or HTTPS protocol under the control of the main control unit 11a. In the information terminal 2, the main control unit 21a reads and executes the HTML5 Web application program 27 after executing the native application program 26, so that the HTML5 display control unit 21d displays the mail image based on the HTML data on the display unit 24. Control to display.

  Here, FIG. 8 conceptually illustrates and describes the characteristics of communication in the service system according to the second embodiment. As shown in FIG. 8A, the server apparatus 1 receives and holds an e-mail based on SMTP or IMAP with the cloud mail server, but with the information terminal 2, the HTTP or An e-mail image is transmitted as HTML data based on HTTPS. Accordingly, the HTML data is erased after browsing in the information terminal 2, so that no e-mail is accumulated in the information terminal 2. In this regard, conventionally, as shown in FIG. 8B, mail is received between the information terminal and the cloud mail server by SMTP, POP3 (Post Office Protocol) or IMAP. However, in the present embodiment, the problem is solved. Although it is described as cloud-related in FIG. 8, it is not limited to the cloud mail server 3 and can be exchanged with a general mail server that is installed in the company and supports SMTP and IMAP. Of course.

  Hereinafter, with reference to the flowchart of FIG. 9, the flow of processing related to mail browsing by the service system according to the second embodiment of the present invention will be described in detail.

  In the information terminal 2, when the mail browsing request unit 21e makes an email browsing request (S21), in the server device 1, the communication unit 12 receives this (S22), and the service function unit 11e Then, the external mail service cooperation function 100d accesses the cloud mail server 2 to read out the e-mail information (S23). This reading is performed based on the SMTP or IMAP protocol. Then, the screen generation unit 11d generates HTML data based on the information of the e-mail, and transmits the HTML data to the information terminal 2 via the communication unit 12 under the control of the main control unit 11a (S25). This transmission is performed based on the protocol of HTTP or HTTPS.

  In the information terminal 2, when the HTML data is received (S26), the HTML5 display control unit 21d displays a mail image on the display unit 24 (S27). Thereby, the user of the information terminal 2 can browse the mail. At this time, in the information terminal 2, the main control unit 21a reads and executes the HTML5 Web application program 27 after executing the native application program 26, so that the HTML5 display control unit 21d sends the mail based on the HTML data to the display unit 24. The image of is displayed. In this way, a series of processes relating to browsing of electronic mail is completed. In the information terminal 2, when browsing mail by an image, if the sender (sender) or destination (recipient) of the mail is a person registered in the cloud phone book, link information to the cloud phone book is displayed. It is possible to refer to the cloud phonebook by selecting the sender and destination and to view the detailed information of the person as appropriate.

  As described above, in the second embodiment of the present invention, a service system including the information terminal 2 and the server device 1 is provided. In this service system, the information terminal 2 displays a display by the main control unit 21a, a mail browsing request unit 21e that requests the server device 1 to browse a mail, a display unit 24 that displays at least an image, and a display unit 24. An HTML5 display control unit 21d to be controlled. The server device 1 receives a mail browsing request from the information terminal 2 and receives a mail from the cloud mail server 3 and transmits HTML data related to the mail to the information terminal 2 to display a predetermined display. And a main control unit 11a for prompting. In the information terminal 2, the main control unit 21a reads out and executes the HTML5 Web application program 27 after executing the native application program 26, so that the HTML5 display control unit 21d displays the image based on the HTML data on the display unit 24. Control to display. Here, the HTML data may be transmitted based on the HTTP or HTTPS protocol.

  Furthermore, in 2nd Embodiment of this invention, the server apparatus 1 which can communicate freely with the information terminal 2 and the cloud mail server 3 is provided. This server device 1 receives a mail browsing request from the information terminal 2 and receives a mail from the cloud mail server 3, and transmits HTML data related to the mail to the information terminal 2 to display a predetermined display. And a main controller 11a that prompts the user to do so. In the information terminal 2, after executing the native application program 26, the HTML5 Web application program 27 is read and executed, and prompts the user to display an image based on the HTML data.

  And in 2nd Embodiment of this invention, the program run with the information terminal 2 which can communicate with the server apparatus 1 is provided. In this program, the information terminal 2 includes a mail browsing request unit 21e that requests the server device 1 to browse a mail, an HTML5 display control unit 21d that controls display by the display unit 24, and an HTML5 display control unit 21d that displays the display unit 24. And a hybrid configuration comprising a native application program 26 and a web application program 27 of HTML5.

  Therefore, in the second embodiment of the present invention, the e-mail information is sent as HTML data to the information terminal side under the HTTP or HTTPS protocol, so that after the image is displayed and erased, the e-mail information is displayed. Since data does not remain on the information terminal 2 side, it is possible to prevent information leakage.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, Of course, various improvement and change are possible in the range which does not deviate from the meaning.

  For example, the service functions are not limited to those described above, and it goes without saying that functions that contribute to the realization of UC may be added as appropriate.

DESCRIPTION OF SYMBOLS 1 Server apparatus 2 Information terminal 3 Cloud mail server 4 Network 11 Control part 11a Main control part 11b Authentication part 11c Function change part 11d Display control part 11e Service function part 12 Communication part 13 Cloud telephone directory DB
14 User management DB
15 storage unit 21 control unit 21a main control unit 21b connection destination information registration unit 21c authentication unit 21d HTML5 display control unit 21e mail browsing request unit 22 communication unit 23 operation unit 24 display unit 25 storage unit

Claims (8)

A service system comprising an information terminal and a server device,
The information terminal
A main control unit;
A connection destination information registration unit for registering connection destination server information;
An authentication requesting unit for requesting authentication to the connection destination server device;
A display unit for displaying at least an image;
A display control unit that controls display by the display unit,
The server device
An authentication unit that performs authentication in response to an authentication request from the information terminal;
A function changing unit that changes a function that can be executed by the information terminal based on an authentication result;
A server main control unit that transmits HTML data to the information terminal and prompts a predetermined display;
In the information terminal, the main control unit reads and executes an HTML5 Web application program after executing the native application program, so that the display control unit displays an image based on the HTML data on the display unit. To control the service system. The service server according to claim 1, wherein the HTML data is data relating to an operation screen, and differs depending on connection destination server information. A server device that can communicate with an information terminal,
An authentication unit that performs authentication in response to an authentication request from the information terminal;
A function changing unit that changes a function that can be executed by the information terminal based on an authentication result;
A server main control unit that transmits HTML data to the information terminal and prompts a predetermined display;
A server device characterized by prompting to display an image based on the HTML data by reading and executing an HTML5 Web application program after executing a native application program on the information terminal side. A program executed on an information terminal that can communicate with a server device,
The information terminal is
Connection destination information registration unit for registering connection destination server information,
An authentication request unit for requesting authentication to the connection destination server device;
A display control unit that controls display by the display unit, and a main control unit that controls the display control unit to display an image based on the HTML data on the display unit,
A hybrid program consisting of a native application program and an HTML5 web application program. A service system comprising an information terminal and a server device,
The information terminal
A main control unit;
A mail browsing request unit for requesting mail browsing to the server device;
A display unit for displaying at least an image;
A display control unit that controls display by the display unit,
The server device
A service function unit that receives a mail browsing request from the information terminal and receives a mail from a cloud mail server;
A server main control unit that transmits HTML data relating to the mail to the information terminal and prompts the information terminal to perform a predetermined display;
In the information terminal, the main control unit reads and executes an HTML5 Web application program after executing the native application program, so that the display control unit displays an image based on the HTML data on the display unit. To control the service system. The service system according to claim 5, wherein the HTML data is transmitted based on an HTTP or HTTPS protocol. A server device capable of communicating with an information terminal and a cloud mail server,
A service function unit that receives a mail browsing request from the information terminal and receives a mail from a cloud mail server;
A server main control unit that transmits HTML data relating to the mail to the information terminal and prompts the information terminal to perform a predetermined display;
A server apparatus, wherein the information terminal is configured to read and execute an HTML5 Web application program after executing a native application program, and to prompt the user to display an image based on the HTML data. A program executed on an information terminal that can communicate with a server device,
The information terminal is
A mail browsing request unit for requesting mail browsing to the server device;
A display control unit that controls display by the display unit, and a main control unit that controls the display control unit to display an image based on the HTML data on the display unit,
A hybrid program consisting of a native application program and an HTML5 web application program.