JP6293611B2 - Page synchronization method and program for displaying same page synchronously between terminals - Google Patents

Description

  The present invention relates to a technique for displaying the same page on each browser in synchronization between terminals.

  A terminal based on a user operation is generally mounted with a “Web browser” as a user interface for connecting to the Internet and playing and operating various media. Browsers can acquire content asynchronously and draw dynamic content, especially with the spread of Asynchronous JavaScript + XML (AJAX). On the other hand, in recent years, a technique for displaying the same page in synchronization with each browser among a plurality of terminals has become widespread.

  2. Description of the Related Art Conventionally, there is a technique in which a control terminal and a controlled terminal access a Web server via a synchronization control server to synchronize an operation on the browser of the control terminal with the controlled terminal (see, for example, Patent Document 1). . According to this technique, first, each of the control terminal and the controlled terminal opens a node manager window for managing communication with the synchronization control server, separately from the window synchronized based on the user operation. For the control terminal, a page transition event based on a user operation on the browser is detected by the page manager, and the event is transmitted to the synchronization control server. The synchronization control server transmits the event information to the controlled terminal. The controlled terminal receives the event information by the node manager, and the event information is reflected on the page. As described above, the page synchronization service is provided without adding a further function to the existing Web server by mediating the synchronization control server.

  As a conventional technique based on the same applicant, there is a technique for displaying the same page among a plurality of terminals without adding further functions to an existing Web server and using an existing browser installed in the terminal ( For example, see Patent Document 2). According to this technology, the synchronization control server mediates all communication between the terminal and the Web server. The synchronization control server controls an operation event based on a user operation on the terminal to be transmitted to the synchronization control server by returning the page response returned from the Web server to the terminal including the synchronization control script.

JP 2000-215173 A JP 2012-049771 A

According to the above-described prior art, when transitioning between pages, the same page is synchronized between the control terminal and the controlled terminal by executing the following steps.
(1) The control terminal acquires a transition destination page by transmitting a page acquisition request and receiving a page response.
(2) The control terminal transmits a page transition event to the controlled terminal via the synchronization control server.
(3) The controlled terminal acquires a transition destination page by transmitting a page acquisition request based on the page transition event and receiving a page response.

  Here, for example, a case is assumed in which the same page is synchronously displayed on the browser between an operator terminal on the call center side in customer service and a user terminal on the customer side. Usually, an operator terminal corresponds to a control terminal and a user terminal corresponds to a controlled terminal in order to control a customer terminal led by an operator of a call center. The operator terminal executes page transition first, and then the user terminal performs page transition.

  However, it is assumed that the page transition event transmitted from the control terminal cannot be received by the controlled terminal due to a network failure or session disconnection. At this time, a mismatch of page screens occurs between the control terminal and the controlled terminal. According to customer service, subsequent support may not proceed smoothly.

  In particular, if the operator proceeds with the conversation with the customer while assuming that the screen of the control terminal is synchronized with the screen of the controlled terminal, there is a high possibility that the support will not proceed smoothly. In this case, due to the nature of customer service, it is more desirable to restore screen matching by operator operation than to restore screen matching by customer operation. However, for example, when the “return” button of the browser is clicked, a page that is cached in the browser is normally read, so that there is a problem that synchronization cannot be achieved. In addition, in order to restore screen synchronization, there are cases where many operation steps are required, such as clearing the browser cache.

Therefore, according to the present invention, as viewed from the control terminal, and an object thereof is to provide a page synchronization lateral Ho及 beauty program page to always coincide with the display screen of the control terminal are displayed synchronously.

According to the present invention, in a page synchronization method in a system having a control terminal and a controlled terminal, a Web server that distributes a page, and a synchronization server that synchronizes display of a page between the control terminal and the controlled terminal.
A first step in which the control terminal transmits a page transition notification including a page address to the controlled terminal via the synchronization server;
The controlled terminal transmits a page acquisition request including the page address of the received page transition notification to the Web server via the synchronization server, receives the page response via the synchronization server, and the synchronization server caches the page response. A second step of:
The controlled terminal has a third step of transmitting a page transition notification including the page address to the control terminal via the synchronization server;
The control terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server, and receives a page response from the synchronization server to synchronize the page with the controlled terminal. To do.

According to another embodiment of the page synchronization method of the present invention,
For the second step,
A twenty-first step in which the controlled terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server;
A 22nd step in which the synchronization server forwards the page acquisition request to the web server based on the page address and caches the page response received from the web server;
A 23rd step in which the synchronization server embeds a script for transmitting a page transition notification to the synchronization server in the page response and transmits the page response to the controlled terminal;
The controlled terminal has a 24th step of displaying the page of the received page response,
For the third step, the controlled terminal sends a page transition notification including the page address to the synchronization server by executing a script,
As a fourth step,
A 41st step in which the control terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server;
A forty second step in which the synchronization server sends a page response based on the page address of the page acquisition request cached for the second step to the control terminal;
It is also preferable that the control terminal has a 43rd step of displaying the page of the page response.

According to another embodiment of the page synchronization method of the present invention,
For the first step, the control terminal transmits a page acquisition request including the page address to the synchronization server, and transmits a page transition notification including the page address to the synchronization server. The synchronization server holds the page acquisition request,
As a fourth step, it is also preferable that the synchronization server transmits a page response to the pending page acquisition request to the control terminal, and the control terminal displays the page.

According to another embodiment of the page synchronization method of the present invention,
For the first step, the synchronization server starts a first timer that counts a predetermined time after sending a page transition notification to the controlled terminal,
When the first timer times out, the synchronization server sends a page transition loss notification to the control terminal,
The control terminal also preferably specifies a retry alarm due to receipt of the page transition loss notification.

According to another embodiment of the page synchronization method of the present invention,
About a 1st step, after transmitting a page transition notice to a synchronous server, a control terminal starts the 2nd timer which times predetermined time,
It is also preferable that the control terminal transmits a page acquisition request including the page address of the previous page transition notification to the synchronization server when the second timer times out.

According to another embodiment of the page synchronization method of the present invention,
Regarding the first step, it is also preferable that the control terminal transmits a page transition notification including the next page address by an operation of selecting a link button on the display screen or completing an input of text.

According to the present invention, in a page synchronization method of a server that can communicate with a control terminal and a controlled terminal and a Web server that distributes a page and synchronizes display of a page between the control terminal and the controlled terminal.
The server
A first step of receiving a page transition notification including a page address from the control terminal or the controlled terminal, and transferring the page transition notification to the controlled terminal or the control terminal;
A second step of transferring a page acquisition request including a page address received from a controlled terminal to a Web server and returning a page response received from the Web server to the controlled terminal;
A third step of caching the page response sent back to the controlled terminal;
When a page acquisition request including a page address is received from the control terminal, a fourth step of returning the page response previously accumulated in the third step to the control terminal is executed. It is characterized in that the page is synchronized with the terminal.

According to the present invention, the control terminal and the controlled terminal can communicate with the Web server that distributes the page, and the computer is mounted on the server that synchronizes the display of the page between the control terminal and the controlled terminal. In the program to let
A first step of receiving a page transition notification including a page address from the control terminal or the controlled terminal, and transferring the page transition notification to the controlled terminal or the control terminal;
A second step of transferring a page acquisition request including a page address received from a controlled terminal to a Web server and returning a page response received from the Web server to the controlled terminal;
A third step of caching the page response sent back to the controlled terminal;
When a page acquisition request including a page address is received from the control terminal, the computer executes a fourth step of returning the page response previously stored in the third step to the control terminal, and It is characterized in that a page is synchronized with a controlled terminal.

According to page synchronization direction Ho及 beauty program of the present invention, as viewed from the control terminal, the page to always coincide with the display screen of the control terminal are displayed synchronously.

It is a system configuration diagram in the present invention. It is a 1st sequence diagram in this invention. It is a 2nd sequence diagram in this invention. It is a 3rd sequence diagram in the present invention. It is a sequence diagram showing the case where the page transition notification transmitted from the synchronous server to the controlled terminal is lost. It is a sequence diagram showing the case where the page transition notification transmitted to the control terminal from the synchronous server is lost. It is a functional block diagram of the synchronous server in this invention.

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

  FIG. 1 is a system configuration diagram according to the present invention.

  According to FIG. 1, the synchronization server 1, the terminal 2, and the Web server 3 are connected to the Internet. The terminal 2 can acquire a Web page by transmitting a page acquisition request to the Web server 3 via the synchronization server 1 functioning as a proxy server. That is, the synchronization server 1 functions as a Web server for the terminal 2 and functions as a Web client for the Web server 3. The synchronization server 1 may be accessed from an unspecified number of terminals, or may receive only access from terminals connected to a specific network domain.

  For example, assume that pages are synchronized between an operator terminal of a call center and a user terminal of a customer. In this case, the operator terminal is the “control terminal” and the user side terminal is the “controlled terminal”. These terminals 2 may be personal computers, smart phones or tablet terminals. The terminal 2 is equipped with a browser, and reproduces and operates the received web page. The browser displays one or more windows, and displays a web page for each window.

  FIG. 2 is a first sequence diagram in the present invention.

According to the present invention, control is performed so that the page that the operator of the control terminal desires to synchronize with the controlled terminal is first displayed on the controlled terminal and then displayed on the control terminal. According to FIG. 2, the present invention largely performs the following four steps.
[Step 1: S1] The control terminal transmits a “page transition notification” including a page address (URL (Uniform Resource Locator)) to the controlled terminal via the synchronization server.
[Step 2: S2] The controlled terminal transmits a page acquisition request including the page address of the received page transition notification to the Web server via the synchronization server, and receives a page response via the synchronization server. The synchronization server also caches the page response.
[Step 3: S3] The controlled terminal transmits a page transition notification including the page address to the control terminal via the synchronization server.
[Step 4: S4] The control terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server, and receives a page response from the synchronization server. Synchronize.

[Step 1: S1]
The control terminal 2 </ b> A transmits a “page transition notification” including the page address of the page desired to be synchronized to the synchronization server 1.
On the other hand, the synchronization server 1 transfers the page transition notification received from the control terminal 2A to the controlled terminal 2B.

  According to FIG. 1 described above, a support menu screen for synchronizing with the user is displayed on the call center operator terminal 2A. The support menu page lists the titles (buttons) of pages that are to be shifted in synchronization with the user terminal 2B. By clicking on the title, one of the pages is selected. In addition, a field for inputting an arbitrary URL is provided, and the operator himself can input the URL of the page to be shifted in synchronization. Then, when the operator presses the notification button, the control terminal 2A transmits a page transition notification to the synchronization server 1.

[Step 2: S2]
(S21) The controlled terminal 2B transmits a page acquisition request including the page address of the received page transition notification to the synchronization server 1. The “page acquisition request” is, for example, an HTTP (HyperText Transfer Protocol) GET method request.

(S22) Here, the synchronization server 1 does not cache the page at the page address of the page acquisition request. For this purpose, the synchronization server 1 transfers the page acquisition request to the Web server 3 based on the page address. On the other hand, the synchronization server 1 receives a page response from the Web server 3 and caches the page response.

(S23) The synchronization server 1 returns a page response (200OK) in which a “script” for transmitting a page transition notification to the synchronization server is embedded to the controlled terminal 2B. The script describes the function that the controlled terminal 2 should operate.

  A “script” refers to a simple program that does not need to be compiled (converted) into machine language. In general, executable programs need to compile source code into machine language, whereas scripts do not require compilation. The script is generally embedded in HTML (Hyper Text Markup Language) of a Web page. Thus, a special development environment is not required, and various functions that cannot be provided only by HTML are provided by executing a script. Examples of the script description language include JavaScript (registered trademark), VBScript (registered trademark), Perl (registered trademark), and the like.

Here, JavaScript is an object-oriented script language that should be able to be interactively expressed on the Web. JavaScript can be executed by an existing browser installed in the terminal.
For example, the following tags can be incorporated into an HTML file.
<script type = "text / javascript" src = "sample.js">
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・
</ script>
This tag means "JavaScript is used and the script file is sample.js". According to the present invention, in the js file (synchronization control script), for example, the function to be transmitted by the controlled terminal 2B that has received the page response to the synchronization server 1 is described.

(S24) The controlled terminal 2B executes the rendering process in the page response and displays the page on the display.

[Step 3: S3] At this time, the controlled terminal 2B also executes the script embedded in the page. As a result, the controlled terminal 2B transmits a page transition notification including the page address to the synchronization server 1.
On the other hand, the synchronization server 1 transfers the page transition notification received from the controlled terminal 2B to the control terminal 2A.

[Step 4: S4]
(S41) The control terminal 2A transmits a page acquisition request including the page address of the received page transition notification to the synchronization server 1.
(S42) At this time, the synchronization server 1 has already cached the page at the page address of the page acquisition request. Therefore, the page response can be immediately returned to the control terminal 2A.
(S43) The control terminal 2A executes rendering processing for the page response and displays the page.

  According to the steps of S1 to S4 described above, after the page is cached in advance in the synchronization server 1 by the page acquisition request transmitted from the controlled terminal 2B, the page acquisition request transmitted from the control terminal 2A A synchronization page is returned to the control terminal 2A. Thereby, the same page can be synchronously displayed between the control terminal 2A and the controlled terminal 2B.

  FIG. 3 is a second sequence diagram in the present invention.

  In the second sequence in FIG. 3, messages are exchanged in the same manner as in the first sequence in FIG. 2, but “Comet” for holding the request is used. “Comet” can transmit an event generated in the server to the terminal without receiving a request message from the terminal. Specifically, the server is put on hold without immediately responding to the request from the terminal. When an event occurs on a predetermined page, the server responds to the page. As a result, an event occurring in the server can be immediately transmitted to the terminal.

  In the following, only the S0, S1, and S3 that are different from the first sequence in FIG. 2 will be described in the second sequence in FIG.

(S0) Each of the control terminals 2A and 2B transmits a Comet request to the synchronization server 1 in advance.
On the other hand, the synchronization server 1 places this Comet request on hold. The synchronization server 1 uses a response (200 OK) to the pending Comet request as a page transition notification to be transmitted to the control terminals 2A and 2B.
In this way, the control terminal 2A and the controlled terminal 2B establish a session with the synchronization server 1 in advance.

(S1) (S3) The control terminal 2A (or controlled terminal 2B) configures a “page transition notification” to be transmitted to the synchronization server 1 as a message of an HTTP POST method. Upon receiving the page transition notification of the POST request, the synchronization server 1 immediately returns a response (200 OK).
Here, the synchronization server 1 transfers the page transition notification to the controlled terminal 2B (or the control terminal 2A) as a Comet response (200OK) held in S0.
The controlled terminal 2B (or the control terminal 2A) receives the page transition notification as a Comet response (200OK).
The controlled terminal 2B (or the control terminal 2A) transmits a Comet request again to the synchronization server 1 so that the next event can be received.

  FIG. 4 is a third sequence diagram in the present invention.

The third sequence in FIG. 4 holds the page acquisition request without using Comet, as compared with the second sequence in FIG.
(S41) According to FIG. 4, the control terminal 2A transmits the page acquisition request of S41 of FIG. 2 in advance at the same time as or before the step S1. That is, the control terminal 2A transmits a page acquisition request (S41) and a page transition notification (S1) to the synchronization server 1 almost simultaneously. Here, the synchronization server 1 holds the page acquisition request.

(S42) When receiving the page transition notification from the control terminal 2B, the synchronization server 1 checks the page address (URL) included in the page transition notification. When the page address matches the already cached page, a page response including the cached page is returned to the control terminal 2A. The synchronization server 1 can return a page response to the control terminal 2A without accessing the Web server 1 again.

  FIG. 5 is a sequence diagram illustrating a case where the page transition notification transmitted from the synchronization server to the controlled terminal is lost.

  Regarding S1, according to FIG. 5, the control terminal 2A transmits a page transition notification to the synchronization server 1, and the synchronization server 1 transmits the page transition notification to the controlled terminal 2B. At this time, it is assumed that the page transition notification transmitted from the synchronization server 1 does not reach the controlled terminal 2B for some reason (for example, network failure or session disconnection).

  The synchronization server 1 of the present invention activates a “first timer” that measures a predetermined time after transmitting a page transition notification to the controlled terminal 2B. Then, when the first timer times out without receiving a page acquisition request from the controlled terminal 2B, the synchronization server 1 transmits a “page transition loss notification” to the control terminal 2A. The control terminal 2A can clearly indicate a retry alarm to the operator (for example, pop-up) by receiving the page transition loss notification.

  At this time, since both the control terminal 2A and the controlled terminal 2B do not change the page, the displayed page is kept synchronized. The operator who operates the control terminal 2A can retry the page transition operation again.

  FIG. 6 is a sequence diagram illustrating a case where the page transition notification transmitted from the synchronization server to the control terminal is lost.

  Regarding S3, according to FIG. 6, the controlled terminal 2B transmits a page transition notification to the synchronization server 1, and the synchronization server 1 transmits the page transition notification to the control terminal 2A. At this time, it is assumed that the page transition notification transmitted from the synchronization server 1 does not reach the control terminal 2A for some reason (for example, network failure or session disconnection). At this time, since the synchronization server 1 cannot communicate with the control terminal 2A, the page transition loss notification cannot be transmitted to the control terminal 2A as shown in FIG.

  The control terminal 2A of the present invention activates a “second timer” that measures a predetermined time after transmitting the page transition notification to the synchronization server. Then, when the second timer times out without receiving the page acquisition request from the synchronization server 1, the control terminal 2A, for the fourth step, includes the “page acquisition request including the page address of the previous page transition notification. Is transmitted to the synchronization server 1 (see S41 in FIG. 2). Here, for the control terminal 2A, a new page acquisition request may be automatically transmitted simultaneously with the timeout of the second timer, or manually transmitted based on an operator operation. There may be.

  In S3, when the page transition notification transmitted from the synchronization server 1 to the control terminal 2A is lost, the synchronization server 1 has already cached the page itself. Therefore, when the synchronization server 1 receives a page acquisition request from the control terminal 2A due to the timeout of the second timer, the synchronization server 1 can immediately return a page response including the page to the control terminal 2A.

  At this time, since both the control terminal 2A and the controlled terminal 2B transition pages, the displayed pages are kept synchronized.

  FIG. 7 is a functional configuration diagram of the synchronization server in the present invention.

  According to FIG. 7, the synchronization server 1 includes a communication interface 10 connected to the Internet, an HTTP processing unit 11, a proxy function unit 12, a page transition notification transfer unit 13, a page request response transfer unit 14, and a page response. A cache unit 15 and a page response reply unit 16 are included. These functional components excluding the communication interface are realized by executing a program that causes a computer mounted on the server to function.

  The HTTP processing unit 11 exchanges messages based on HTTP between the terminal 2 and the Web server 3.

  The proxy function unit 12 functions as a Web server for the terminal 2 and functions as a Web client for the Web server 3.

The page transition notification transfer unit 13 receives a “page transition notification” including a page address from the control terminal 2A or the controlled terminal 2B, and transfers the “page transition notification” to the controlled terminal 2B or the control terminal 2A.
Control terminal 2A-> (page transition notification)-> controlled terminal 2B (see S1 in FIG. 2)
Controlled terminal 2B-> (Page transition notification)-> Control terminal 2A (see S3 in FIG. 2)

  The page request response transfer unit 14 transfers the page acquisition request including the page address received from the controlled terminal 2B to the Web server 3 (see S2 in FIG. 2). Then, the page request response transfer unit 14 returns the page response received from the Web server 3 to the controlled terminal 2B. Here, the page request response transfer unit 14 embeds a script in the page response returned to the controlled terminal 2B. The script describes a function that the controlled terminal 2 </ b> B that has received the page response should send a “page transition notification” to the synchronization server 1.

  The page response cache unit 15 caches the page response returned to the controlled terminal 2B (see S22 in FIG. 2).

  When the page response reply unit 16 receives a “page acquisition request” including the page address from the control terminal 2A, the page response reply unit 16 returns the page response previously stored in the page response cache unit 15 to the control terminal 2A (FIG. 2 S4).

As described above in detail, according to page synchronization direction Ho及 beauty program of the present invention, as viewed from the control terminal, the page to always coincide with the display screen of the control terminal are displayed synchronously.

  Various changes, modifications, and omissions of the above-described various embodiments of the present invention can be easily made by those skilled in the art. The above description is merely an example, and is not intended to be restrictive. The invention is limited only as defined in the following claims and the equivalents thereto.

DESCRIPTION OF SYMBOLS 1 Synchronous server 10 Communication interface 11 HTTP processing part 12 Proxy function part 13 Page transition notification transfer part 14 Page request response transfer part 15 Page response cache part 16 Page response reply part 2A Control terminal 2B Controlled terminal 3 Web server

Claims (8)

In a page synchronization method in a system having a control terminal and a controlled terminal, a Web server that distributes a page, and a synchronization server that synchronizes display of a page between the control terminal and the controlled terminal.
A first step in which the control terminal transmits a page transition notification including a page address to the controlled terminal via the synchronization server;
The controlled terminal transmits a page acquisition request including the page address of the received page transition notification to the Web server via the synchronization server and receives a page response via the synchronization server. A second step of caching the response;
The controlled terminal has a third step of transmitting a page transition notification including the page address to the control terminal via the synchronization server;
The control terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server, and receives a page response from the synchronization server to synchronize the page with the controlled terminal. Feature page synchronization method. For the second step,
A twenty-first step in which the controlled terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server;
A synchronization server, wherein the synchronization server transfers the page acquisition request to the Web server based on the page address and caches the page response received from the Web server;
A 23rd step in which the synchronization server embeds a script for transmitting a page transition notification to the synchronization server in the page response and transmits the page response to the controlled terminal;
The controlled terminal has a 24th step of displaying the page of the received page response,
For the third step, the controlled terminal sends a page transition notification including the page address to the synchronization server by executing the script,
As a fourth step,
A 41st step in which the control terminal transmits a page acquisition request including the page address of the received page transition notification to the synchronization server;
A forty-second step in which the synchronization server transmits a page response based on the page address of the page acquisition request cached for the second step to the control terminal;
The page synchronization method according to claim 1, wherein the control terminal includes a forty-third step of displaying the page of the page response. For the first step, the control terminal transmits the page acquisition request including the page address to the synchronization server, and transmits a page transition notification including the page address to the synchronization server, and the synchronization server transmits the page acquisition request. Hold,
The page according to claim 1 or 2, wherein, as a fourth step, the synchronization server transmits a page response to the pending page acquisition request to the control terminal, and the control terminal displays the page. Synchronization method. For the first step, the synchronization server starts a first timer that counts a predetermined time after sending a page transition notification to the controlled terminal,
When the first timer times out, the synchronization server sends a page transition loss notification to the control terminal,
The page synchronization method according to any one of claims 1 to 3, wherein the control terminal clearly indicates a retry alarm due to the reception of the page transition loss notification. About a 1st step, after transmitting a page transition notice to a synchronous server, a control terminal starts the 2nd timer which times predetermined time,
The control terminal transmits a page acquisition request including a page address of the previous page transition notification to the synchronization server when the second timer times out, 5. The page synchronization method described.   6. The first step according to claim 1, wherein the control terminal transmits the page transition notification including the next page address by an operation of selecting a link button on the display screen or completing an input of text. The page synchronization method according to any one of the above. In a page synchronization method of a server that is communicable with a control terminal and a controlled terminal and a Web server that distributes a page, and synchronizes display of a page between the control terminal and the controlled terminal.
The server
A first step of receiving a page transition notification including a page address from the control terminal or the controlled terminal, and transferring the page transition notification to the controlled terminal or the control terminal;
A second step of transferring a page acquisition request including a page address received from a controlled terminal to a Web server and returning a page response received from the Web server to the controlled terminal;
A third step of caching the page response sent back to the controlled terminal;
When a page acquisition request including a page address is received from the control terminal, a fourth step of returning the page response previously accumulated in the third step to the control terminal is executed. A page synchronization method for a server, characterized in that a page is synchronized with a terminal. In a program to be executed by a computer mounted on a server that can communicate with a control terminal and a controlled terminal and a Web server that distributes a page and that synchronizes display of the page between the controlled terminal and the controlled terminal.
A first step of receiving a page transition notification including a page address from the control terminal or the controlled terminal, and transferring the page transition notification to the controlled terminal or the control terminal;
A second step of transferring a page acquisition request including a page address received from a controlled terminal to a Web server and returning a page response received from the Web server to the controlled terminal;
A third step of caching the page response sent back to the controlled terminal;
When a page acquisition request including a page address is received from the control terminal, the computer executes a fourth step of returning the page response previously stored in the third step to the control terminal, and A program for a server, characterized in that a page is synchronized with a controlled terminal.

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