CN100352195C - Jp2004348666 - Google Patents

Abstract

The invention provides a system of a client and a server, a server and an information processing system. In the dragging client and server system, the server controls the dragging time of the client. The server (10) has a Web server (11), a sequence control unit (12), and a client management unit (13). The web server (11) accepts the request from the client (20), and returns a response corresponding to the request to the client (20). A Web server (11) or a sequence control unit (12) generates a command for a client (20) to make a predetermined request. The client management unit (13) transmits the generated command to the client (20).

Description

Client and server systems, servers and information processing systems

technical field

The present invention relates to a technique for controlling the sequence of screens displayed on a client, and more particularly to a technique for controlling the sequence of Web applications from a server.

Background technique

With the popularization of Web technology, the number of client and server systems using Web servers and Web browsers has begun to increase. The features of this system include the advantages that the system can be easily constructed using screens described in HTML (HyperText Markup Language), etc., and excellent personalized services can be provided.

However, HTTP (Hyper Text Transfer Protocol: Hypertext Transfer Protocol) used in this system is a very simple communication protocol that responds to requests from clients and returns responses from servers. As a result, applications using HTTP are typically pull-and-pull systems where the client actively obtains the necessary information.

Therefore, some kind of processing by the server is necessary for the request from the client, so it may not be able to respond immediately. In addition, regardless of the operation of the client, depending on the status of the application managed by the server, it may be necessary to display a certain screen on the client. In these cases, the client often sends a request to the server at a certain interval, and when the server's conditions are complete, it accepts the specified response, thereby achieving the goal.

Contents of the invention

It is an object of the present invention to provide a technique in which the server controls the timing of dragging by the client in a dragging client and server system.

Another object of the present invention is to perform sequence control of screens displayed on a client in a system of a client and a server.

The system of the client and the server according to an embodiment of the present invention includes: a client with a browser and a server that accepts an HTTP (Hyper Text Transfer Protocol) request from the browser and returns an HTTP response corresponding to the request. The server has: according to the connection establishment request from the client, a connection unit that establishes a connection with the client using a socket; an instruction generation unit that generates an instruction for the browser to perform a specified request; The connection established by the unit is an instruction sending unit that sends the generated instruction to the client, and the system is characterized in that the server further has: a content that stores the contents of a plurality of display pages whose display order is predetermined A storage unit; when receiving a request from the client to acquire any one of the plurality of display pages, a judging unit for judging whether the request conforms to the display order, and when the acquired request does not conform to the When the display order is specified, the instruction generating unit generates an instruction for the client to make a request conforming to the display order. In this way, even in a system of a client and a server communicating by HTTP, the server can control the client's request and can also control the display order of the display pages displayed by the client.

In a preferred embodiment, the connection unit may also have a storage unit for storing the IP address of the client after the connection is established. In this case, the generation unit generates a command corresponding to the client whose IP address is stored in the storage unit, and the transmission unit refers to the storage unit and transmits the generated command.

The server according to one embodiment of the present invention has: a response unit that accepts a request from a client and returns a response corresponding to the request to the client; an instruction generation unit that generates an instruction for the client to perform a specified request; The client sends the instruction sending unit of the generated instruction, and the server is characterized in that it also has: a content storage unit that stores the contents of a plurality of display pages whose display order is predetermined; When obtaining any one of the plurality of display pages from the terminal, a judging unit that judges whether the request conforms to the display order, and when the acquired request does not conform to the display order, the instruction generating unit Instructions are generated for the client to make requests in accordance with the display order. In this way, the server can control the requests made by the client, and can also control the display order of the display pages displayed by the client.

A server according to one embodiment of the present invention has: a response unit that accepts a request from the first client and returns a response corresponding to the request to the first client; accepts a request from the first client and generates a response unit for the second client to perform an instruction generating unit for a command of a prescribed request; an instruction sending unit for sending the generated instruction to the second client. In this way, the first client can control the display screen of the second client using the server.

An information processing device according to an embodiment of the present invention has: a Web server that receives an HTTP (Hyper Text Transfer Protocol) request from a Web browser owned by a client and returns an HTTP response corresponding to the request; A connection establishment request, using a socket connection unit to establish a connection with the client; an instruction generation unit that generates an instruction that causes the Web browser to perform a specified HTTP request corresponding to the Web server; An established connection, an instruction sending unit that sends the generated instruction to the client, the information processing device is characterized in that the server further includes: a content that stores the contents of a plurality of display pages whose display order is predetermined A storage unit; when receiving a request from the client to acquire any one of the plurality of display pages, a judging unit for judging whether the request conforms to the display order, and when the acquired request does not conform to the When the display order is specified, the instruction generating unit generates an instruction for the client to make a request conforming to the display order.

The present invention also relates to a method for making a request from a client, the method comprising: a step of accepting a request from the client and returning a response corresponding to the request to the client; generating a request for the client to make a request A step of generating an instruction; and a step of sending the generated instruction to the client, the method is characterized in that it also has: a step of pre-storing the contents of a plurality of display pages with a predetermined display order, and when receiving When the request from the client is a request to obtain any one of the plurality of display pages, it is determined whether the request conforms to the display order, and when the obtained request does not conform to the display order, the In the generating step, an instruction for causing the client to make a request in accordance with the display order is generated.

The present invention also relates to another method for making a request from a client, the method having the steps of: receiving an HTTP request from a Web browser owned by the client, and returning an HTTP response corresponding to the request; corresponding to the connection from the client Establishing a request, using a socket to establish a connection with the client; generating an instruction for the Web browser to perform a specified HTTP request corresponding to the Web server; using the established connection, sending to the The step of sending the generated instruction by the client, the method is characterized in that it also has the step of pre-storing the contents of a plurality of display pages with a predetermined display order, when the received request from the client is to obtain When a request for any one of the plurality of display pages is requested, it is determined whether the request conforms to the display order, and when the obtained request does not conform to the display order, the generating step generates the The client is instructed to make a request in accordance with the display order.

In a preferred embodiment, the instruction may also include the URL (Uniform Resource Locator: same resource locator) of the Web page displayed by the Web browser.

Description of drawings

FIG. 1 is a configuration diagram of a system to which a client and a server according to an embodiment of the present invention are applied.

FIG. 2 is a diagram showing an example of a client list.

FIG. 3 is a flowchart showing the procedure of the forced page switching process.

FIG. 4 is a flowchart of processing performed by the sequence control unit 12 .

Fig. 5 is a diagram showing an example of a processing procedure when order processing is performed.

In the figure: 1-client and server system; 10-server; 11-WEB server; 12-sequence control department; 13-client management department; 16, 25-socket communication department; 20-client; 21- WEB browser; 22-Request issuance instruction part.

Detailed ways

Hereinafter, a system applying a client and a server according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an overall configuration diagram of a client and server system 1 according to the present embodiment. This system 1 has a server 10 and a client 20 . In FIG. 1 , there is one client 20 , but there may be a plurality of clients. The server 10 and the client 20 are connected through networks (not shown) such as the Internet and LAN (Local Area Network).

Both the server 10 and the client 20 are configured by, for example, a general-purpose computer system, and each component or function of the server 10 and the client 20 described below is realized, for example, by executing a computer program.

In the client 20, a Web browser 21 and a socket communication unit 25 are installed. The client 20 can use the Web browser 21 to acquire various information from the Web server, and display it on a display device (not shown, the same applies hereinafter). At this time, the Web browser 21 sends an HTTP (HyperText Transfer Protocol) request to the Web server, and acquires various information described in HTML (Hyper Text Markup Language) as an HTTP response thereto. Therefore, this system 1 is a so-called drag system in which the client 20 actively acquires information.

In the present embodiment, the Web browser 21 further includes a request issuance instruction unit 22 . The request issuance instructing unit 22 receives a page switching command (details will be described later) from the server 10, and instructs a request for issuance based on the received page switching command. For example, a URL is included in the page switching command, and the request issuance instructing unit 22 instructs issuance of a request for acquiring a Web page specified by the URL. The request issuance instructing unit 22 can be realized by reading application software called, for example, an applet.

Server 10 has: Web server 11; Sequence control section 12; Client management section 13; The relay processing unit 15 that transfers the notified information among the sequence control unit 12 ; the socket communication unit 16 ; and the content storage unit 17 that stores a plurality of Web pages.

The state notification processing unit 14 and the relay processing unit 15 can also be realized as, for example, a DLL (Dynamic Link Library).

The status notification processing unit 14 notifies the sequence control unit 12 of the status of the Web browser 21 based on the response returned from the Web server 11 to the Web browser 21 .

The Web pages stored in the content storage unit 17 include display pages whose display order (sequence) is predetermined. For example, a Web page related to user authentication is displayed on the Web browser 21 in the order of idle screen→authentication start screen→authentication confirmation screen→personal screen.

The Web server 11 receives an HTTP request from a Web browser, and returns an HTTP response corresponding thereto. For example, based on the URL (Uniform Resource Locator) included in the HTTP request, the Web page stored in the content storage unit 17 is acquired and returned as a response.

The sequence control unit 12 controls the display sequence of Web pages displayed on the display device of the client. For example, the order control unit 12 stores a display order of Web pages predetermined by the program as described above. The sequence control unit 12 judges whether or not the Web pages displayed on the Web browser 21 conform to the sequence. When this order is not followed, a page switching command is generated to make a request conforming to this order. The page switching command generated here includes URLs of Web pages to be displayed next in sequence. This page switching command is notified to the client management unit 13 via the relay processing unit 15 .

In addition, the Web server 11 generates a page switching command in response to a request from the client, and notifies the command to the client management unit 13 via the relay processing unit 15 . For example, if a page switching command is sent to a client different from the client that has sent the request, it is possible to control the display screen of another client from a certain client. In this case, the URL of the page to be displayed, the IP address of the target client to display the page, and the like are included in the request. This processing can be implemented as a thread within the Web server 11 .

That is, the system 1 is basically a dragging operation in which the client 20 actively acquires information from the server 10 , but the client 20 can be forced to perform the dragging operation by generating a page switching command and pushing the client 20 by the sequence control unit 12 .

The generation time of the page switching command may be any time other than the above. For example, the sequence control unit 12 may generate a page switching command based on a notification from an application program (not shown).

The socket communication units 16 and 25 are connection units that establish a connection with each other using a socket. Therefore, the client 20 and the server 10 can communicate by establishing a socket-based connection using the socket communication units 16 and 25 in addition to HTTP-based communication.

The socket communication unit 16 establishes a socket-based connection, for example, in response to a request from the socket communication unit 25 of the client. The IP address of the connected client can also be registered in the client data table 19 . Using this connection, the client management unit 13 transmits the page switching command generated by the sequence control unit 12 .

The client management unit 13 manages the target clients for which the server 1 performs sequence control. The client management unit 13 has a client data table 19 of registered clients of sequence control targets. The client data table 19 has, for example, as shown in FIG. 2 , an IP address 191 of the client and an ID 192 for identifying the client in the server. By referring to this data sheet, the client of the sequence control object can be known.

Next, the processing procedure of the server 10 forcing the client 20 to switch pages in the system 1 having the above configuration will be described using the flowchart of FIG. 3 .

First, the sequence control unit 12 requests the client management unit 13 to acquire an ID through the relay processing unit 15, and acquires the ID of the client registered in the client data table 19 (S11). The sequence control unit 12 generates a page switching command, and notifies it to the client management unit 13 via the relay processing unit 15 (S12). The destination ID is added to the page switching command. The client management unit 13 converts the ID into an IP address, and transmits a page switching command from the socket communication unit 25 to the client 20 .

In the client 20, the request issuance instructing unit 22 acquires the page switching command via the socket communication unit 25, and instructs the Web browser 21 to issue a page for acquiring the URL included in the page switching command (S14). The Web browser 21 issues a request to the server 10 according to the instruction (S15). At the server 10, the Web server 11 returns a response according to the request (S16). The Web browser 21 receives the response, and switches the page to be displayed on the display device (S17).

As a result, the server 10 can force the client 20 to perform page switching.

Next, the processing of the sequence control unit 12 when displaying contents whose sequence is predetermined will be described using the flowchart of FIG. 4 . Here, the example sequence is an authentication program consisting of display page 1 (idle screen)→display page 2 (authentication start screen)→display page 3 (authentication confirmation screen)→display page 4 (personal screen). In this program, when the display time of the display page 2 and the display page 3 does not shift to the next screen even after a certain time elapses, it returns to the display page 1 as time-out.

The sequence control unit 12 generates a page switching command to display the page 1 and sends it to the client 20 to display the page 1 (S21). The sequence control part 12 monitors the state change of the client 20, and determines whether the display page has been switched (S22). When the display page has been switched (YES in S22), it is determined whether or not the newly displayed display page is the display page 2 (S23). Here, when the page 2 is not switched to display (No in S23), since the sequence is out of order, it returns to step S21, and the page 1 is forcibly displayed.

When switching to the display page 2 (S23 is Yes), because the order is met, so proceed to the next step to determine whether the time for displaying the page 2 exceeds the prescribed time (S24). When the display time of the displayed page 2 exceeds the predetermined time (YES in S24), the process returns to step S21 to forcibly display the page 1. When the predetermined time has not passed (S24: No), the sequence control part 12 monitors the state change of the client 20, and determines whether the display page has been switched (S25). When the display page has been switched (YES in S25), it is determined whether or not the newly displayed display page is the display page 3 (S26). Here, when the display page 3 is not switched (S26 is No), because the sequence does not conform to the order, the sequence control unit 12 generates a page switching command to display the page 2, and sends it to the client 20 to display the page 2, and returns to step S24 (S31).

When the display page 3 has been switched (YES in S26), because the order is met, the process proceeds to the next step, and it is judged whether the time for displaying the page 3 has passed the prescribed time (S27). When the display time of the displayed page 3 exceeds the predetermined time (YES in S27), the process returns to step S21 to forcibly display the page 1. When the predetermined time has not passed (S27: No), the sequence control part 12 monitors the state change of the client 20, and judges whether the display page was switched (S28). When the display page has been switched (YES in S28), it is determined whether or not the newly displayed display page is display page 4 (S29). Here, when the display page 4 is not switched (S29 is No), because the sequence does not conform to the order, the sequence control unit 12 generates a page switching command to display the page 3, and sends it to the client 20 to display the page 3, and returns to step S27 (S32). When the display page 4 has been switched (YES in S29), since the order is matched, the personal screen is continuously displayed. In this way, the server 10 can control the order of screens displayed on the client 20 .

Next, the processing procedure when the server 10 receives an order for a product or the like from the client 20 in the present system 1 will be described with reference to FIG. 5 .

First, the Web browser 21 of the client 20 displays an order screen for inputting an order. The user who is using the client 20 inputs necessary information on this screen, and sends a request to the server 10 (S41). When the Web server 11 accepts the request, it returns a confirmation screen indicating that the order has been accepted to the Web browser 21 as a response (S42).

Then, the Web server 11 instructs the order processing unit 30 that performs predetermined order processing such as inventory check to perform processing (S43). When the order processing unit 30 completes the predetermined processing, it notifies the sequence control unit 12 of the result (S44). The sequence control unit 12 generates a page switching command for displaying an order result screen showing the order result, and sends it to the client 20 through the client management unit 13 (S45, S46).

In the client 20, the request issuance instructing unit 22 receives the instruction, and instructs the Web browser 21 to issue a request for acquiring the display page 3 (S47). In response to this request, the Web browser 21 requests the Web server 11 to obtain an order result screen, and displays the obtained screen.

In this way, after accepting the request, some processing must be performed, so even if the processing result cannot be returned immediately, the provisional response (S42) to the request (S41) can be returned first, and the server will notify the client of the end of processing time. The terminal enables the client to obtain a display page displaying the processing result. That is, according to the present embodiment, in a system of a drag-and-drop client and a server, the server can push to force the client to drag.

The above-mentioned embodiments of the present invention are for illustrating examples of the present invention, and the scope of the present invention should not be limited to these embodiments. Those skilled in the art can implement the present invention in various other ways without departing from the technical idea of the present invention.

Claims (7)

1. the system of client and server, this system comprises: possesses the client of browser and accepts HTTP request, return server the http response of described request from described browser,

Described server has:

Corresponding connection from described client is set up request, the linkage unit that uses socket and described client to connect;

Generation makes the instruction generation unit of the request that described browser stipulates;

The connection that use is set up by described linkage unit sends the transmitting element of the instruction of described generation to described client,

Described system features is that described server also has:

Storage has a plurality of content storage unit that show the content of page or leaf that DISPLAY ORDER is determined in advance;

When receiving the request of arbitrary page in described a plurality of demonstration pages or leaves from obtaining of described client, judge whether this request is the identifying unit that meets described DISPLAY ORDER,

When described request of obtaining did not meet described DISPLAY ORDER, described instruction generation unit generated and makes described client meet the instruction of the request of described DISPLAY ORDER.

2. the system of client according to claim 1 and server, described linkage unit also has the memory cell of the IP address of the client after storage connects,

Described instruction generation unit generates correspondingly has the instruction of the client of IP address in described cell stores,

Described transmitting element sends the instruction of described generation with reference to described memory cell.

3. server, this server has:

Acceptance is returned the response unit of the response of corresponding described request from the request of client to described client;

Generation makes the instruction generation unit of the instruction of the request that described client stipulates; With

Send the instruction sending unit of the instruction of described generation to described client,

Described server is characterised in that also have:

Storage has a plurality of content storage unit that show the content of page or leaf that DISPLAY ORDER is determined in advance;

When receiving the request of arbitrary page in described a plurality of demonstration pages or leaves from obtaining of described client, judge whether this request is the identifying unit that meets described DISPLAY ORDER,

When described request of obtaining did not meet described DISPLAY ORDER, described instruction generation unit generated and makes described client meet the instruction of the request of described DISPLAY ORDER.

4. information processor, this information processor has:

Accept the HTTP request from the Web browser that client has, return the Web server of the http response of corresponding described request;

Set up request according to connection, the linkage unit that uses socket and described client to connect from described client;

Generation makes described Web browser send the instruction generation unit of instruction of the HTTP request of regulation to described Web server; With

The connection that use is set up by described linkage unit sends the instruction sending unit of the instruction of described generation to described client,

Described information processor is characterised in that described Web server also has:

Storage has a plurality of content storage unit that show the content of page or leaf that DISPLAY ORDER is determined in advance;

When receiving the request of arbitrary page in described a plurality of demonstration pages or leaves from obtaining of described client, judge whether this request is the identifying unit that meets described DISPLAY ORDER,

When described request of obtaining did not meet described DISPLAY ORDER, described instruction generation unit generated and makes described client meet the instruction of the request of described DISPLAY ORDER.

5. information processor according to claim 4 is characterized in that, described instruction comprises the URL of the Web page or leaf that makes described Web browser demonstration.

6. method that client is asked, this method has:

Acceptance is returned the step of the response of corresponding described request from the request of client to described client;

Generation makes the generation step of the instruction of the request that described client stipulates; With

Send the step of the instruction of described generation to described client,

Described method feature is also have:

Storage in advance has a plurality of steps that show the content of page or leaf that DISPLAY ORDER is determined in advance,

When the described request that receives from client be obtain described a plurality of when showing arbitrary page in the page or leaf request, judge whether this request is to meet described DISPLAY ORDER, when described request of obtaining did not meet described DISPLAY ORDER, generation made described client meet the instruction of the request of described DISPLAY ORDER in described generation step.

7. method that client is asked, this method has:

Reception is asked from the HTTP of the Web browser that client has, and returns the step of the http response of corresponding described request;

Corresponding connection from described client is set up request, the step of using socket and described client to connect;

The generation step of the instruction that the HTTP that generation makes described Web browser carry out the regulation of corresponding described Web server asks;

Use the connection of described foundation, send the step of the instruction of described generation to described client,

Described method feature is also have:

Storage in advance has a plurality of steps that show the content of page or leaf that DISPLAY ORDER is determined in advance,

When the described request that receives from client be obtain described a plurality of when showing arbitrary page in the page or leaf request, judge whether this request is to meet described DISPLAY ORDER, when described request of obtaining did not meet described DISPLAY ORDER, generation made described client meet the instruction of the request of described DISPLAY ORDER in described generation step.

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