JP2013186769A - Information output sharing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information output sharing system etc. in which output of various types of information such as an image and voice are shared between a plurality of clients easily with a lower load in comparison with the past.SOLUTION: An information output sharing system 1 is configured by communicably connecting a plurality of clients 10 and a server 30. The clients 10 comprise a message transmission unit 13a which transmits a message including operation content specification information for specifying an operation causing a change in output content of the clients 10 to the server; and a message reception unit 13b which executes the operation specified by the message received from another client 10. At least one of each of the plurality of clients 10 or the server 30 comprises means to store transfer destination specification information for specifying a transmission destination of the massage and means to specify a client which becomes a transfer destination of the massage on the basis of the transfer destination specification information.

Description

  The present invention relates to an information output sharing system for outputting various information in a shared manner among a plurality of clients.

  Conventionally, a system for sharing a desktop image among a plurality of clients has been proposed. According to such a system, for example, an electronic conference in which a plurality of participants hold a meeting while viewing a common image, or an electronic lesson in which a teacher conducts a class for a plurality of students while viewing a common image, This can be realized even when the users are located away from each other.

  In such a system, it is necessary to transmit the data of the entire image or the updated portion to a plurality of clients at regular intervals. For example, in Patent Document 1, in a system configured by connecting a plurality of clients to be communicable via a server, image data is transmitted from the server to each client each time the shared screen area of the server is updated. Is disclosed.

JP 2005-348262 A

  However, in such a conventional system, it is necessary to transmit image data to the client every time the image is updated. Therefore, the system load and the network load increase, and depending on the system environment and the network environment, the image on the client is increased. There was a problem that updating was not performed quickly. In particular, if you want to have a real-time feeling by sharing not only the updated image but also the drawing state that is being updated, or if you have a large number of clients, send a larger amount of image data more frequently. The problem has become even more pronounced.

  The present invention has been made in view of the above, and the output of various information such as images and sounds can be performed in a shared manner among a plurality of clients with easier and lower load than before. An object of the present invention is to provide an information output sharing system, an information output sharing server, an information output sharing client, and an information output sharing program.

  The information output sharing system according to claim 1 or the information output sharing program according to claim 6 includes operation content specifying information for specifying an operation that causes a change in the output content in the output means of the client. Since the message is transferred to another client and the operation is executed by the other client, the processing load on the client and the server can be reduced as compared with the case where the output content itself such as image data is transferred. The load on the network can be reduced. For this reason, the information output sharing process can be executed at a higher speed than before, and the real-time property and convenience in information output sharing can be improved.

  According to the information output sharing system of claim 2, the client ID corresponding to the group ID is acquired, and the client to be the message transfer destination is specified based on the acquired client ID. The destination can be specified by the concept of group, and it is possible to set various groups according to the purpose and application and use them differently. Compared to the case where the message forwarding destination is specified for each client, information output is shared. It is possible to improve convenience in

  According to the information output sharing system according to the third aspect or the information output sharing program according to the fifth aspect, since the transfer destination of the message is specified mainly by the server, it is possible to reduce the load on the client.

  According to the information output sharing system of the fourth aspect, since the transfer destination of the message is mainly specified by the client, it is possible to reduce the load on the server and when the server is down for some reason. Even if it exists, since it can switch to another server easily and information output sharing can be continued, it becomes possible to improve the reliability of information output sharing.

1 is a block diagram functionally conceptually showing an information output sharing system according to Embodiment 1 of the present invention. It is a figure which shows the structural example of the client list classified by URL. It is a figure which shows the structural example of a group list. It is a figure which shows the structural example of the process target list in a server. It is a figure which shows the structural example of a transfer rule table. It is a flowchart of a connection process. It is a flowchart of a group setting process. It is a flowchart of an information output sharing process. FIG. 9 is a flowchart of information output sharing processing following FIG. 8. FIG. It is a block diagram which shows the information output sharing system which concerns on this Embodiment 2 functionally conceptually. It is a flowchart of an information output sharing process.

  Hereinafter, embodiments of an information output sharing system according to the present invention will be described in detail with reference to the accompanying drawings. First, after explaining a basic concept common to each embodiment, the specific contents of each embodiment will be described, and finally, modifications to each embodiment will be described. However, the present invention is not limited to each embodiment.

[Basic concept common to each embodiment]
First, a basic concept common to the embodiments will be described. This information output sharing system is a system for outputting various information in a shared manner among a plurality of clients (terminal devices). The content and output form of “information” are arbitrary and include the case where an image is displayed and output and the case where sound is output as a sound. In the following, the case where an image is displayed and output will be described. The “plurality of clients” may be the same device as each other or may be devices different from each other. “Shared” means that the same information is output by a plurality of clients. However, if necessary, there is a difference in information output contents and output timing among a plurality of clients. Or outputting only one or some of the plurality of clients selected from the clients.

  The specific application purpose of this information output sharing system is arbitrary. For example, an electronic conference in which a plurality of participants hold a meeting while viewing a common image, or a teacher gives a plurality of students a viewing of a common image. List electronic classes for classes. Below, the case where an electronic lesson is performed is demonstrated. In this electronic class, there are “teacher” and “student” as “user types”. A “teacher” is a person who conducts a lesson, and a “student” is a person who takes a lesson. However, when it is not necessary to distinguish such types of users, these types of users are collectively referred to as “users”. In this electronic lesson, it is assumed that there are a “teacher client” that is a client used by a teacher and a “student client” that is a client used by students as “client types”. However, when there is no need to distinguish such client types, these types of clients are collectively referred to as “clients”. Note that the type of client is a division seen from the type of user, and does not necessarily mean the physical type of the client. For example, each client can be configured as the same device.

  The basic concept of the connection between the client and the server in this information output sharing system will be described. Each client is installed with a “client-side application” that is an information output sharing application for clients (information output sharing program for clients). The function of this client-side application enables connection to the server in each client, etc. Is done. As this client-side application, unless otherwise specified, each client uses the same application.

  On the other hand, a server-side application (server-side information output sharing program) “server-side application” is installed in the server, and the server-side application function enables connection with each client. Done. This server side application communicates with each client based on a predetermined communication standard. Although this communication standard is arbitrary, it is preferable to adopt a communication standard with a low network load. For example, after establishing a connection with a client, communication can be performed using a dedicated protocol without establishing a connection again. Websocket can be used. The server is provided with a client object. This client object is a communication mediation program that mediates communication with a client, and is configured as a Servlet that is one of execution forms on the Web server side of Java (registered trademark), for example.

  Under such a premise, the client connects to the server using a URL (Uniform Resource Locator). As this URL, different URLs are set according to the type of client. For example, there are a teacher URL and a student URL. A plurality of URLs can be provided for each type. For example, when teacher A is in charge of class A and teacher B is in charge of class B, teacher A has a teacher URL for class A. The teacher B may connect to the server using the teacher URL for class B.

  In this information output sharing system, when an operation that causes a change in the output content in the client output means is performed, this operation is executed as an operation for causing a change in the output content in the output means of another client. . “Operation to change the output content” means to change the output content so that the user can grasp that the output content has been changed. For example, when the information is an image, In addition to changes to information, such as displaying an image, erasing an image, and changing a part of an image, changes to information output means such as changing the brightness of a client display are included. Hereinafter, such an operation that causes a change in the output content is simply referred to as an “operation”.

  In order to change the output contents of another client based on this operation, information is transmitted from the client to which the operation has been performed to the server, and the server transfers this information to the other client. In the following, the information transmitted and forwarded in this way is “message”, the client that is the sender of the message (the client that is directly operated by the user) is “client of the sender”, and the message destination (send The destination client is referred to as a “destination client”.

  In this way, when transferring a message, it is necessary to specify the destination client. The transfer destination client identification processing includes 1) a form mainly performed by the server, 2) a form mainly performed by the client, or 3) a form performed jointly by the server and the client. Hereinafter, a mode mainly performed by the server will be described in Embodiment 1, a mode mainly performed by the client will be described in Embodiment 2, and a mode performed jointly by the server and the client will be described in a modification.

[Embodiment 1]
Next, the first embodiment will be described. This form is a form in which the server mainly performs the process of specifying the transfer destination client. First, the configuration of the information output sharing system according to the present embodiment will be described, and then the processing performed in the information output sharing system will be described.

(Constitution)
First, the configuration of the information output sharing system according to the first embodiment will be described. FIG. 1 is a block diagram functionally conceptually illustrating the information output sharing system according to the first embodiment. The information output sharing system 1 is configured by connecting a plurality of teacher clients 10A and a plurality of student clients 10B and a server 30 via a network 40 so that they can communicate with each other.

(Configuration-Client)
The teacher client 10 </ b> A and the student client 10 </ b> B are configured as the same device except for special points, and will be collectively described below as the client 10. The client 10 is configured in terms of functional concept by connecting an input unit 11, an output unit 12, a control unit 13, a storage unit 14, and a network IF 15 via a bus. A book computer, a tablet computer, or a smartphone is used.

  The input unit 11 is an input unit for inputting various types of information to the client 10, and in particular, an operation unit for performing an operation that causes a change in the output content of the output unit 12 of the client 10. The specific configuration of the input unit 11 is arbitrary, and can be configured as, for example, a mouse, a keyboard, or a touch panel.

  The output unit 12 is an output unit for outputting various types of information at the client 10. The specific configuration of the output unit 12 is arbitrary. For example, the output unit 12 can be configured as a flat panel display such as a known liquid crystal display or organic EL display.

  The control unit 13 includes a CPU (Central Processing Unit), various programs interpreted and executed on the CPU (control programs such as an OS, programs that define various processing procedures, etc.), required programs, and required data. It is configured with a cache memory for storing (the control unit 31 described later is also the same). Various programs interpreted and executed on the CPU include a client-side application. The client-side application is stored in an arbitrary storage medium including, for example, a CD-ROM and a DVD, and then installed and stored in a storage unit. 14 is stored in a nonvolatile manner, and is interpreted and executed by the CPU, thereby constituting a substantial function of the control unit 13.

  The control unit 13 includes a message transmission unit 13a and a message reception unit 13b in terms of functional concept. The message transmitting unit 13a generates a message including operation content specifying information for specifying the operation and transmits the message to the server 30 when the operation is performed via the input unit 11 of the client 10. It is. When the message receiving unit 13b receives a message from another client 10 via the server 30, the message receiving unit 13b converts the operation specified by the operation content specifying information included in the message into the output content in the output unit 12 of the client 10. Message receiving means executed as an operation for causing a change. The function of each unit will be described together with each process.

  The storage unit 14 is a storage unit that stores information and parameters necessary for various processes executed by the client 10 in a nonvolatile manner, and is configured by, for example, an HD (Hard Disk) or a semiconductor memory (a storage unit 32 described later). The same). The storage unit 14 stores a client ID and a teacher application or a client application. The client ID is client identification information for uniquely identifying the client 10. That is, the storage unit 14 functions as a client identification information storage unit that stores client identification information.

  The network IF 15 is a communication unit for connecting the client 10 to the server 30 via the network 40 so as to be communicable, and is configured as a network board, for example.

(Configuration-Server)
In FIG. 1, the server 30 is configured by connecting a control unit 31, a storage unit 32, and a network IF 33 through a bus in terms of functional concept, for example, using a known Web server. .

  Various programs that are interpreted and executed on the CPU of the control unit 31 include a server-side application. The server-side application is stored after being stored in an arbitrary storage medium including, for example, a CD-ROM and a DVD. Thus, it is stored in the storage unit 32 in a nonvolatile manner, and is interpreted and executed by the CPU, thereby constituting a substantial function of the control unit 31.

  The control unit 31 includes a transmission / reception control unit 31a in terms of functional concept. The transmission / reception control unit 31 a is a transmission / reception control unit that, when receiving a message from the client 10, transfers the message to another client 10. In particular, in the first embodiment, when the message is received from the client 10, the transmission / reception control unit 31a receives the received message based on the transfer destination specifying information stored in the transfer destination specifying information storage means described later. The client 10 to be the transfer destination is specified, and functions as a transfer control unit that performs predetermined control so that the specified client 10 receives the message.

  The storage unit 32 stores a URL client list 32a, a group list 32b, an in-server processing target list 32c, and a transfer rule table 32d. These URL-specific client list 32a, group list 32b, in-server processing target list 32c, and transfer rule table 32d constitute transfer destination specifying information for specifying the transfer destination of a message, in part or in cooperation. That is, the storage unit 32 functions as a transfer destination specifying information storage unit that stores transfer destination specifying information.

  The URL-specific client list 32a is a list configured by associating the URL used when the client 10 connects to the server 30 and the type of the client 10 with each other. That is, the storage unit 32 functions as URL-specific client specifying information storage means for storing the URL-specific client list 32a. As shown in the configuration example of FIG. 2, the URL-specific client list 32a is configured by associating an item “URL set”, an item “URL”, an item “client object”, and information corresponding to each item with each other. ing. The item “URL set” is information for specifying a combination (set) of the transmission destination client 10 and the transfer destination client 10. In the example of FIG. 2, one or more teacher URLs and one or more URLs are used. Are associated with each other, the client 10 connected to the server 30 using the teacher URL and the client 10 connected to the server 30 using the student URL Clients 10 that connect to the server 30 using these teacher URLs or clients 10 that connect to the server 30 using the student URLs are transmission destinations or transfer destinations. It is specified. Information corresponding to the item “URL” is a URL used when the client 10 connects to the server 30. Information corresponding to the item “client object” is a client object generated for each client 10 when the client 10 connects to the server 30. The client list 32a by URL is generated or updated based on the generated client object when the client 10 connects to the server 30 and a client object is automatically generated by the server 30 in the connection process described later. The

  The group list 32b is a list configured by associating a client ID for uniquely identifying the client 10 with a group ID for uniquely identifying a group configured by the client 10. That is, the storage unit 32 functions as a group identification information storage unit that stores the group list 32b. As shown in the configuration example of FIG. 3, the group list 32 b is configured by associating an item “client ID” and an item “group ID” with information corresponding to each item. Information corresponding to the item “client ID” is a client ID. Information corresponding to the item “group ID” is a group ID (group identification information) for uniquely identifying the group. The group list 32b is generated or generated in a group setting process described later.

  The server processing target list 32 c is a list for specifying a message to be processed inside the server 30 without being transferred to another client 10 among messages transmitted from the client 10. That is, the storage unit 32 functions as an in-server processing message specifying information storage unit that stores the in-server processing target list 32c. As shown in the configuration example of FIG. 4, the intra-server processing target list 32c is configured by associating an item “message type” with information corresponding to this item. The information corresponding to the item “message type” is the type of message to be processed inside the server 30. The in-server processing target list 32 c is created by the administrator of the server 30 and stored in the storage unit 32.

  The transfer rule table 32d is a table configured by associating the type of the client 10 that is the message transmission source and the type of the client 10 that is the candidate of the message transfer destination. That is, the storage unit 32 functions as a transfer rule specifying information storage unit that stores the transfer rule table 32d. As shown in the configuration example of FIG. 5, the transfer rule table 32d includes items “transmission source client type”, item “message type”, item “group ID presence / absence”, and item “transfer destination candidate”. And the information corresponding to these items are associated with each other. Information corresponding to the item “type of client of transmission source” is the type of client 10 of the message transmission source. The information corresponding to the item “message type” is a message type. Information corresponding to the item “presence / absence of group ID” is group identification information presence / absence specifying information for specifying the presence / absence of a group ID. Here, there is “none” indicating that there is no group ID, or there is a group ID. “Yes” is stored. The information corresponding to the item “client as a transfer destination candidate” is transfer destination client specifying information for specifying the client 10 as a message transfer destination candidate. For example, the transfer destination specifying information stored in the second record from the top in FIG. 5 is “the type of the transmission source client = student” for the message transmitted from the client 10 (for connection to the server 30). If the URL used is a student URL), “message type = draw line”, and “group ID = none” (message does not contain a group ID), This indicates that “transfer destination candidate clients = all teachers” (all clients 10 whose URLs used for connection with the server 30 are teacher URLs are transfer destination candidates). The transfer rule table 32 d is created by the administrator of the server 30 and stored in the storage unit 32.

  The network IF 33 is a communication unit for connecting the server 30 to the client 10 via the network 40 so as to be communicable, and is configured as a network board, for example.

(Configuration-Network)
The network 40 in FIG. 1 is a WAN (Wide Area Network), which is typically the Internet, but may include a dedicated communication line or a LAN (Local Area Network).

(processing)
Next, various processes performed in the information output sharing system 1 configured as described above will be described. This process is roughly divided into a connection process, a group setting process, and an information output sharing process. Hereinafter, each process will be described sequentially. However, each of these processes may actually be executed as a series of continuous processes, or some processes may be executed as internal processes of some other processes. In the following description, it is assumed that each process is performed at an arbitrary timing except for a specially described timing, and that the processes are performed by the control units 13 and 30 except for a subject to be specifically described. “Step” is abbreviated as “S”.

(Processing-Connection processing)
First, the connection process will be described. This process is a process that is started when a teacher application or a student application is started in the client 10 by a predetermined method using the input unit 11, and is a process for establishing a connection between the client 10 and the server 30. . FIG. 6 is a flowchart of the connection process.

  First, the control unit 13 of the client 10 accesses the server 30 based on a predetermined URL, and transmits a connection request to the server 30 based on a predetermined communication standard (SA1). As the URL at this time, for example, a URL preset in the teacher application or the student application is used.

  Upon receiving the connection request, the control unit 31 of the server 30 establishes a connection with the client 10 based on a predetermined communication standard (SA2). Further, the control unit 31 of the server 30 generates a client ID for uniquely identifying the client 10 that established the connection by a known method, and transmits the client ID to the client 10 (SA3). At this time, the control unit 31 generates a client object including the generated client ID by a known method, and stores the generated client object in the URL client list 32a. That is, in the URL client list 32a, a URL set of a teacher URL and a student URL used by the client 10 is set in advance, and the client 10 connects the generated client object to the server 30. The URL is stored in the URL-specific client list 32a in association with the URL (teacher URL or student URL) used. Note that the client object stored in the URL-specific client list 32a is discarded when the connection with the server 30 is disconnected.

  On the other hand, the client 10 that has received the client ID from the server 30 stores the received client ID in the storage unit 14 (SA4). This ends the connection process.

  By performing such a connection process, each teacher can connect to the server 30 by starting the teacher application of his / her client 10, and each student can use the student application of his / her client 10. By starting up, the server 30 can be connected.

  After such connection processing, each teacher acquires the client ID of each student client 10B connected to the server 30 at an arbitrary timing. Specifically, 1) client ID acquisition processing of each student client 10B currently connected to the server 30, and 2) client ID acquisition processing of each student client 10B newly connected to the server 30 after that, 3) Thereafter, the client ID of each student client 10B that has disconnected from the server 30 is deleted.

  The client ID acquisition process of each student client 10B currently connected to the server 30 is performed as follows. First, the message transmitting unit 13a of each teacher client 10A generates a message for acquiring the client ID of each student client 10B and transmits the message to the server 30. This message is generated in the same format as the message described in the information output sharing process described later, and includes “message type = acquisition of client ID of each student”. The transmission / reception control unit 31a of the server 30 that has received this message identifies all the student clients 10B belonging to the same URL set as the teacher client 10A with reference to the URL client list 32a, and all the identified clients are identified. The message is transferred to the student client 10B. The message receiving unit 13b of the student client 10B that has received this transfer transmits the client ID stored in its own storage unit 14 to the server 30. Then, the transmission / reception control unit 31a of the server 30 transmits this client ID to the teacher client 10A. The client ID transmitted in this way is stored in the storage unit 14 of the teacher client 10A. By performing such processing, the client ID of each student client 10B currently connected to the server 30 is acquired.

  Thereafter, the client ID acquisition process of each student client 10B newly connected to the server 30 is performed as follows. First, the message transmission unit 13 a of the student client 10 </ b> B newly connected to the server 30 generates a message for transmitting the client ID stored in its own storage unit 14 and transmits it to the server 30. This message is generated in the same format as the message described in the information output sharing process described later, and includes “message type = student client ID transmission” and “data = client ID”. The transmission / reception control unit 31a of the server 30 that has received this message identifies all the teacher clients 10A belonging to the same URL set as the student client 10B with reference to the URL client list 32a, The message is transmitted to the teacher client 10A. The message receiving unit 13b of the teacher client 10A that has received this transmission additionally stores the client ID included in the data of the message in its own storage unit 14. By performing such processing, the client ID of each student client 10B newly connected to the server 30 is acquired.

  Further, the deletion process of the client ID of each student client 10B that is disconnected from the server 30 is performed as follows. First, when the student client 10B is disconnected, the transmission / reception control unit 31a of the server 30 removes the client object corresponding to the disconnected student client 10B from the client list 32a by URL from the client object. The client ID is acquired, all teacher clients 10A belonging to the same URL set as the student client 10B are specified with reference to the client list 32a by URL, and the acquisition is made to all the specified teacher clients 10A. Sent the client ID. The message receiving unit 13b of the teacher client 10A that has received this transmission deletes the client ID from its own storage unit 14. By performing such processing, the client ID of each student client 10B that has disconnected from the server 30 is deleted.

  Thereafter, by repeating such processing, the teacher client 10A of each teacher holds the client ID of each student client 10B connected to the server 30 at that time in the latest state. In this process, this client ID can be used. Here, the case where the teacher client 10A holds the client ID of each student client 10B has been described, but the student client 10B holds the client ID of each teacher client 10A by performing the same processing. You may make it do.

(Processing-Group setting processing)
Next, the group setting process will be described. This process is activated when the teacher application or the student application is instructed to execute the group setting process via the input unit 11 by a predetermined method. However, the group setting process may be started from either the teacher application or the student application (usually only the teacher application). In the following, a case will be described in which the teacher groups students by starting the group setting process from the teacher application. FIG. 7 is a flowchart of the group setting process.

  The control unit 13 of the teacher client 10A displays a predetermined group setting screen on the output unit 12 when a group setting request is made by the teacher via the input unit 11 in a predetermined method. This group setting screen is a screen for inputting information necessary for setting a group. The client ID of each student client 10B stored in the storage unit 14 of the teacher client 10A (the server 30 at that time). The client ID of each student client 10B connected to is displayed. Then, the teacher selects the client ID of the student client 10B to be designated as a group from the client IDs included in the group setting screen via the input unit 11, and inputs an arbitrary group ID to the input unit 11. (SB1, Yes), the message transmission unit 13a generates a group setting message based on the selected client ID and transmits it to the server 30 (SB2). This message is generated in the same format as the message described in the information output sharing process described later, and includes “message type = student group setting” and “data = client ID, group ID”. At this time, the control unit 13 associates the client ID with the group ID to generate a group list similar to that in FIG. 3 and stores it in the storage unit 14.

  On the group setting screen, in addition to the client ID, the name of the user using the client 10 specified by each client ID may be displayed together. For example, the server 30 associates a name set in advance for the teacher application or the student application, or a name input by the teacher or student via the input unit 11 when the teacher application or the student application is activated, with the client ID. When storing the group setting screen client ID from the server 30 to the client 10 from the server 30, the name corresponding to each client ID is transmitted and displayed on the group setting screen together with the client ID. You may make it do. Similarly, in addition to the name, any information that can be used as a reference for specifying the client 10 such as a nickname, age, sex, and facial photo may be displayed.

  On the other hand, when receiving the group setting message from the teacher client 10A, the transmission / reception control unit 31a of the server 30 generates a group list 32b by associating the client ID and the group ID included in the message with each other. And stored in the storage unit 32 (SB3). The transmission / reception control unit 31a generates a group setting message and transmits it to the student client 10B (SB4). This message is generated in the same format as the message described in the information output sharing process described later, and includes “message type = student group setting” and “data = group ID”. The student client 10B to which this message is sent specifies as follows. That is, the student client 10B belonging to the same URL set as the teacher client 10A that is the message transmission source is identified by referring to the client list 32a by URL, and the teacher client 10B is identified among the identified student clients 10B. Only the student client 10B having a client ID that matches the client ID included in the message of the client 10A is set as the message transmission destination.

  When the message receiving unit 13b of the student client 10B receives a group setting message from the server 30, the message receiving unit 13b assumes that the group ID included in the message is the group ID of the group to which the message belongs. 14. This completes the group setting process.

(Processing-Information output sharing process)
Finally, the information output sharing process will be described. This process is a process for outputting information in a shared manner among a plurality of clients 10, and is a process (event-driven process) that is started every time an operation is performed on the client 10. 8 and 9 are flowcharts of the information output sharing process.

  The message transmission unit 13a of the client 10 monitors whether or not an operation for changing the output content has been performed via the input unit 11 (SC1), and when the operation has been performed (SC1, Yes), A message is generated and transmitted (SC2). This completes the information output sharing process in the transmission source client 10.

  This message is information including “message type”, “source client ID”, “transfer destination client ID”, “group ID”, and “data”. It is generated as a JSON character configured by adding a predetermined tag indicating the type of each information.

  Among these pieces of information, the “message type” is automatically specified in accordance with an operation performed on the client 10 via the input unit 11. For example, when the operation is a teacher application launch, “message type = teacher app launch”, and when the operation is a student app launch, “message type = student app launch”, If the operation is line drawing, “message type = line drawing”, if the operation is line deletion, “message type = line deletion”, and if the operation is image display “Message type = display image”, “message type = delete image” when the operation is image deletion, and “ping” (check network connection status with the server 30) when the operation is “delete message” Message type = ping ”.

  The “transmission source client ID” is the client ID of the transmission source client 10. As this client ID, the client ID stored in the storage unit 14 in the connection process described above is used.

  The “transfer destination client ID” is the client ID of the client 10 when there is a client 10 to be designated as the transfer destination. The specific method for specifying the transfer destination client ID is arbitrary. For example, the output unit 12 of the teacher client 10A connected to the server 30 by the connection process has the same URL as the teacher client 10A. Output contents (specifically, desktop screens) displayed on the output units 12 of all student clients 10B belonging to the set are reduced and displayed in parallel. Further, the client ID corresponding to the output content of the output unit 12 of each student client 10B displayed on the output unit 12 of the teacher client 10A is transmitted from the server 30 and held in the teacher client 10A. . In such a situation, the teacher selects the output contents to be included in the message transfer destination among the output contents of the output part 12 of each student client 10B displayed on the output part 12 of the teacher client 10A. Is specified, the client ID corresponding to the specified output content is included in the message as the client ID of the transfer destination. Alternatively, for example, the client ID of the student client 10B is displayed as a list on the output unit 12 of the teacher client 10A, and the teacher inputs the client ID of the transfer destination from the list. You may make it designate via the part 11. FIG. Moreover, when using the output contents of the output unit 12 of the student client 10B and the client ID list of the student client 10B as described above, the names of the students may be displayed together. As the names of the students, for example, a name preset in the student application or a name input by the student through the input unit 11 when the student application is started is transmitted to the teacher client 10A through the server 30. You may do it. In the above description, the case where the teacher mainly selects the client ID of the transfer destination is exemplified. However, even when the student selects the client ID of the transfer destination, “student” and “teacher” in the above description are mutually connected. It can be explained by replacing it.

  “Group ID” is the group ID of the group when there is a group to be designated as the transfer destination. The specific identification method of this group ID is arbitrary. For example, the output unit 12 of the teacher client 10A connected to the server 30 by connection processing belongs to the same URL set as the teacher client 10A. The client IDs of all student clients 10B and the group IDs of the groups to which each student client 10B belongs are acquired from the group list 32b of the server 30 and output in association with each other. In such a situation, when the teacher designates the group ID of the group to be included in the message transfer destination among the output group IDs via the input unit 11, the designated group ID is included in the message. . In the above description, the case where the teacher selects the group ID is mainly exemplified. However, even when the student selects the group ID, “student” and “teacher” in the above description are interchanged to explain. be able to. Note that either or both of the client ID and group ID of the transfer destination can be omitted. For example, when both are omitted, the message is transferred to all clients 10 belonging to the same URL set.

  “Data” is information (operation specifying information) necessary for the operation performed on the client 10 via the input unit 11 to be executed at the client 10 of the transfer destination. 10 is automatically specified in accordance with the operation performed on 10. For example, when the operation is a teacher application launch, “message type = teacher app launch”, and when the operation is a student app launch, “message type = student app launch”, When the operation is a line drawing, the data includes information for specifying the branch line coordinates, the passing point coordinates, the end point coordinates, the line thickness, and the line color of the drawn line by a known method. If the operation is to delete a line, the data includes information for specifying a branch line coordinate, a passing point coordinate, a mark, and an end point coordinate of the deleted line by a known method. Further, when the operation is display of an image, information for specifying the displayed image (for example, URL for specifying the image in the case of an image acquired from the Web), display position of the displayed image And information for specifying the display size of the displayed image by a known method. When the operation is erasure of an image, information for identifying an erased image is included in a known method. In addition, according to the type of operation, information for specifying the content of the operation is specified and included in the data by a known method. However, the data is configured as data having a smaller capacity than when the output content itself of the destination client 10 is transmitted (for example, when the screen data of the destination client 10 is transmitted as it is).

  On the other hand, the transmission / reception control unit 31a of the server 30 monitors reception of a message from the client 10 (SC3), and when a message is received from the client 10 (SC3, Yes), it is included in the received message. Perform processing based on information.

  First, the transmission / reception control unit 31a of the server 30 determines whether or not the received message is a message to be processed inside the server 30 (SC4). Specifically, it is determined whether or not the type of message included in the received message corresponds to the type of message included in the in-server processing target list 32c. If it is determined that the message is not a message and if it corresponds, the message is determined to be processed inside the server 30. For example, if “message type = teacher application activation”, the message to be processed inside the server 30 in order to correspond to the message type included in the in-server processing target list 32c illustrated in FIG. If it is determined that there is “message type = line drawing”, it does not correspond to the message type included in the in-server processing target list 32c illustrated in FIG. It is determined that it is not a message.

  When it is determined that the message is to be processed inside the server 30 (SC4, Yes), the transmission / reception control unit 31a processes the message inside the server 30 without transferring the message to another client 10 ( SC5). For example, if “message type = ping execution”, the ping is executed and the result is transmitted to the client 10 of the transmission source. This completes the information output sharing process in the server 30.

  On the other hand, when it is determined that the message is not to be processed inside the server 30 (No in SC4), the transmission / reception control unit 31a of the server 30 refers to the transfer rule and identifies the client 10 as the transfer destination candidate ( SC6). More specifically, the URL used by the transmission source client 10 for connection to the server 30 is specified by a known method, and the transmission source client 10a is referred to by referring to the URL-specific client list 32a based on the specified URL. Specify 10 types. For example, when the specified URL is a teacher URL, it is specified that “the type of the client 10 as the transmission source = teacher”. Also, the type of message included in the received message is specified. Furthermore, the presence or absence of a group ID in the received message is specified. Then, the transfer destination client 10 corresponding to the combination of the type of the specified source client 10, the type of message, and the presence / absence of the group ID is specified with reference to the transfer rule table 32 d. For example, in the example of FIG. 5, when “source client type = student”, “message type = draw line”, and “group ID = none”, “candidate for transfer destination”. Specify “Client = All teachers”.

  Next, the transmission / reception control unit 31a of the server 30 refers to the client list 32a by URL, acquires a client object, and creates a transfer destination list (SC7). Specifically, all the client objects corresponding to the client 10 that is the transfer destination candidate specified in SC6 are acquired from the transfer destination list. For example, when “client as a transfer destination candidate = all teachers” is specified in SC6, in the example of FIG. 2, in the URL set corresponding to the URL used by the transmission source client 10 for connection to the server 30. Thus, all client objects corresponding to the teacher URL are acquired. Then, a client ID included in each acquired client object is specified, and a transfer destination list configured by the specified client ID is generated.

  Next, the transmission / reception control unit 31a of the server 30 determines whether a group ID is specified in the received message (SC8). Specifically, when a group ID is included in the received message, it is determined that “designation of group ID = present”, and when a group ID is not included in the received message, “group ID” Is specified ”. If it is determined that “group ID designation = none” (SC8, No), the process proceeds to the next SC10. On the other hand, when it is determined that “designation of group ID = present” (SC8, Yes), the client list that does not belong to the group is excluded from the transfer destination list with reference to the group list 32b (SC9). Specifically, a group ID is acquired from the received message, all client IDs corresponding to the acquired group ID are acquired from the group list 32b, and client IDs other than the acquired client ID are received in the received message. The client ID that does not belong to the specified group is excluded from the transfer list generated in SC7.

  Thereafter, the transmission / reception control unit 31a of the server 30 determines whether or not a client ID is specified in the received message (SC10). Specifically, when the received message includes a client ID, it is determined that “client ID designation = present”. When the received message does not include a client ID, “client ID” is determined. Is specified ”. If it is determined that “client ID designation = none” (No in SC10), the process proceeds to the next SC11. On the other hand, if it is determined that “Client ID designation = Yes” (SC10, Yes), the transfer destination list created in SC7, with some client IDs excluded in SC8 as necessary, is transferred. All client IDs that do not match the client ID included in the received message are excluded from the list (SC12).

  Then, the transmission / reception control unit 31a of the server 30 transfers the message based on the client ID included in the transfer destination list (SC11). Specifically, all the client IDs included in the transfer list are acquired from the transfer list created in SC7, with some client IDs excluded in SC8 and SC12 as necessary. To do. Then, the client object corresponding to the acquired client ID is acquired from the client list 32a by URL, and the acquired client object is instructed to transmit a received message to the client 10. Upon receiving this instruction, the client object transmits a message to the client 10 specified by the client ID included in the client object. This transmission is performed using the URL corresponding to the client object in the URL-specific client list 32a. The message transferred in this way may be, for example, the exact same message as the received message, or may be a message generated by excluding unnecessary information from the received message at the transfer destination client 10. . This completes the information output sharing process in the server 30.

  On the other hand, the message receiving unit 13b of the client 10 monitors whether or not a message is received from the server 30 (SC13), and when a message is received (SC13, Yes), based on the content of the received message. Then, an operation for changing the output contents in the output unit 12 is executed (SC14). Specifically, the message receiving unit 13b specifies the content of the operation to be executed based on the type of message included in the received message, and executes the content of the specified operation. For example, if “message type = draw line”, the output unit 12 based on the branch line coordinates, passage point coordinates, end point coordinates, line thickness, and line color of the drawn line designated by “data”. Draw a line on This completes the information output sharing process in the transfer destination client 10.

  By performing such information output sharing processing, when the teacher client 10A is operated, the output content of the student client 10B is changed by this operation, so that the output content of the teacher client 10A is changed to the student client. Shared as 10B output content. Alternatively, when the student client 10B is operated, the output content of the teacher client 10A is changed by this operation, so that the output content of the student client 10B is shared as the output content of the teacher client 10A.

  For example, when the teacher displays a question sentence and reference material that the student wants to show to the student on the output unit 12 of the teacher client 10A, the question sentence and reference material are also displayed on the output unit 12 of the student client 10B. At this time, if the teacher specifies client IDs of all students, these question sentences and reference materials are displayed on the output unit 12 of the student client 10B of all students. Alternatively, when the teacher specifies a group ID of a group to which only some students belong, these question sentences and reference materials are displayed only on the output unit 12 of the student client 10B of the students belonging to the group. . Thereafter, when the student enters an answer in the question sentence displayed on the output unit 12 of the student client 10B, the answer is displayed on the output unit 12 of the teacher client 10A. Next, when the teacher performs scoring by writing a circle or x mark on the answer in the output unit 12, the circle or x mark is also displayed on the output unit 12 of the student client 10B. At this time, when the teacher designates only the client ID of the student who made the answer, the circle mark, the X mark, and the like are displayed only on the output unit 12 of the student client 10B of the student.

[Embodiment 2]
Next, a second embodiment will be described. This form is a form in which the client mainly performs the process of specifying the transfer destination client. However, the configuration and processing relating to this embodiment are the same as the configuration and processing described in the first embodiment, unless otherwise specified, and the same reference numerals as those used in the first embodiment are used as necessary. Will be described. First, the configuration of the information output sharing system according to the present embodiment will be described, and then the processing performed in the information output sharing system will be described.

(Constitution)
First, the configuration of the information output sharing system according to the second embodiment will be described. FIG. 10 is a block diagram functionally conceptually showing the information output sharing system according to the second embodiment.

(Configuration-Client)
In the second embodiment, the message receiving unit 13b in the client control unit 13 receives the message from the client, based on the transfer destination specifying information stored in the transfer destination specifying information storage unit described later. It functions as a transfer control unit that specifies a client to be a transfer destination of the received message and performs predetermined control so that the specified client receives the message.

  The client storage unit 14 stores a group list 32b in addition to the client ID stored in the same manner as in the first embodiment. The client ID and the group list 32b constitute transfer destination specifying information for specifying the transfer destination of the message, in part or in cooperation. That is, the storage unit 14 functions as a transfer destination specifying information storage unit that stores transfer destination specifying information.

(Configuration-Server)
In the storage unit 32 of the server, the group list 32b and the transfer rule table 32d are omitted from the contents stored in the storage unit 32 in the first embodiment.

(processing)
Next, various processes performed in the information output sharing system configured as described above will be described. However, since the connection process can be performed in the same manner as in the first embodiment, the description thereof will be omitted, and the group setting process and the information output sharing process will be described sequentially.

(Processing-Group setting processing)
First, the group setting process will be described. This group setting process can be performed in substantially the same manner as the group setting process of FIG. 7, but SB3 is omitted. That is, when the transmission / reception control unit 31a of the server 30 receives a message from the teacher client 10A, the transmission / reception control unit 31a generates a group setting message without generating the group list 32b and storing it in the storage unit 32. Is transmitted to the client 10B (SB4). This completes the group setting process.
(Office comment: Fig. 11 is almost the same as Fig. 7, so it was deleted and Fig. 12 was moved to Fig. 11. Also, step "SE" in Fig. 12 was changed to "SD". )

(Processing-Information output sharing process)
Next, the information output sharing process will be described. FIG. 11 is a flowchart of the information output sharing process. However, SD1 to SD3 can be performed in the same manner as SC1 to SC3 of the information output sharing process of FIG.

  When it is determined that the message received from the client is not a message to be processed inside the server (SD4, No), the server transmission / reception control unit 31a transmits the message to the transfer destination client (SD6). Specifically, the URL used for connection with the server by the transmission source client is specified by a known method, and the same URL as the specified URL is identified by referring to the client list 32a by URL based on the specified URL. All the clients corresponding to the URL set are identified, and the message is transmitted with the client as the destination client. As a result, the server ends the information output sharing process.

  On the other hand, the message reception unit 13b of the client monitors whether or not a message is received from the server (SD7), and when the message is received (SD7, Yes), the received message should be processed by itself. It is determined whether it is a message.

  Specifically, the message receiving unit 13b determines whether or not the received message is transmitted to the group to which the message belongs (SD8). Specifically, it is determined whether or not the group ID is specified in the received message. If the group ID is not included in the received message, the process proceeds to the next SD9. On the other hand, if the received message includes a group ID, all client IDs corresponding to the group ID are acquired from the group list 32b, and whether the acquired client ID includes its own client ID. If it is included, it is determined that the received message is sent to the group to which it belongs, and if it is not included, the received message is sent to the group to which it belongs. It is determined that it has not been done. If it is determined that the message is not transmitted to the group to which the user belongs (SD8, No), the information output sharing process is terminated.

  On the other hand, if the received message does not contain a group ID or if it is determined that the received message is sent to the group to which it belongs (Yes in SD8), the received message It is determined whether or not it has been transmitted (SD9). Specifically, it is determined whether or not a client ID is specified in the received message. If the client ID is not included in the received message, the process proceeds to SD10. On the other hand, if the received message includes a client ID, it is determined whether or not the client ID matches its own client ID. If the client ID matches, the received message is sent to itself. If it is determined that the received message does not match, it is determined that the received message has been transmitted to itself. If it is determined that it has not been transmitted to itself (SD9, No), the information output sharing process is terminated.

  On the other hand, when the received message does not include the client ID or when it is determined that the received message has been sent to itself (Yes in SD9), the self message is determined based on the content of the received message. The operation for changing the output contents in the output unit 12 is executed (SD10). Specifically, the message receiving unit 13b specifies the content of the operation to be executed based on the type of message included in the received message, and executes the content of the specified operation. For example, if “message type = draw line”, the output unit 12 based on the branch line coordinates, passage point coordinates, end point coordinates, line thickness, and line color of the drawn line designated by “data”. Draw a line on This completes the information output sharing process in the transfer destination client.

(Modification)
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even if the output of various information such as images and sounds can be performed in a shared manner among a plurality of clients, even if it cannot be performed more easily and with a lower load than in the past, When the effect can be obtained by means different from the conventional one, the problem of the present invention is solved.

(About distribution and integration)
Further, each of the electrical components described above is functionally conceptual and does not necessarily need to be physically configured as illustrated. That is, the specific form of distribution / integration of each unit is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured. For example, the server function can be distributed to a plurality of servers. Further, the tables and lists stored in the storage unit 14 of the server or client can be arbitrarily distributed or integrated.

  In particular, the distributed functions of the server function and the client function can be arbitrarily changed. For example, in addition to the mode in which the server mainly performs the transfer destination client specifying process as described in the first embodiment and the mode in which the client is mainly performed as described in the second embodiment, the server and the client cooperate. It is good also as a form performed. In this case, a part of the server storage unit 32 or the control unit 31 in the first embodiment is provided to the client, or a part of the client storage unit 14 or the control unit 13 in the first embodiment is used in the server. You just have to have it.

(About the scope of information to be shared)
The range of information shared among a plurality of clients may be limited by an arbitrary method. For example, sharing of a specific type of image may be restricted, or only information on a specific area in the output range of the output unit 12 of the client may be shared. For example, the shareable range or the share restriction range is set in the client-side application, the client-side application determines whether or not the share is possible, and only the information determined to be shareable is transmitted as a message. That's fine.

(About the increase in user types and client types)
In each of the above-described embodiments, “teacher” and “student” are provided as the “user type”, and the teacher client 10A and the student client 10B are provided as the “client type”. These types of users and types of clients may be increased. For example, a “supervisor” who is a teacher is added as a user type, and a “client for a supervisor” (not shown) used by the supervisor may be included as a client type. . In this case, sharing of information output between the supervisor client and the teacher client 10A may be performed in the same manner as sharing information output between the teacher client 10A and the student client 10B. In this case, the output content of the output unit 12 of the teacher client 10 of each of the plurality of teachers can be shared as the output content of the output unit 12 of the client for the supervisor of the supervisor, It is possible to browse the contents of each teacher's class.

  In addition, a plurality of clients 10 may be used by one user, or a common client 10 may be used by a plurality of different types of users. For example, a “blackboard client” (not shown) having an electronic blackboard function is provided as the client 10. The blackboard client can be configured, for example, in the same manner as the client 10 described above, but the output unit 12 is configured to have a size that can be easily browsed by a plurality of users. When the teacher uses both his / her teacher client 10A and the blackboard client, the output contents of the output section 12 of the teacher client 10A are reflected in the output contents of the output section 12 of the blackboard client as they are. When the contents are shown to the students or the teacher operates the blackboard client, this operation can be reflected only in the output contents of the student client 10B. Alternatively, when the teacher and the student share the blackboard client, when the teacher or the student operates the blackboard client, this operation may be reflected in the output contents of the teacher client 10A and the output contents of the student client 10B. it can.

(About client ID acquisition processing)
In each of the above embodiments, the teacher client 10A of each teacher has been described as having the client ID of each student client 10B connected to the server 30 at that time in the latest state. The client ID may be acquired as necessary. For example, when performing the group setting process, the message sending unit 13a of the teacher client 10A of the teacher performs the same process as the “client ID acquisition process of each student client 10B currently connected to the server 30” described above. The client ID of each student client 10B may be acquired by generating a message for acquiring the client ID of each student client 10B and transmitting it to the server 30.

  Further, in the above-described “client ID acquisition processing of each student client 10B currently connected to the server 30”, the teacher client 10A requests the student client 10B to send the client ID via the server 30. However, this processing may be completed between the teacher client 10A and the server 30 alone. For example, when the transmission / reception control unit 31a of the server 30 receives an acquisition request for the client ID of the student client 10B from the teacher client 10A, the transmission / reception control unit 31a refers to the URL client list 32a in the storage unit 32 or By making a client ID transmission request to the client 10B, the client ID of the student client 10B connected to the server 30 at that time is acquired, and the acquired client ID is transmitted to the teacher client 10A. Also good.

(About group setting processing)
In each of the above embodiments, the teacher inputs the group ID in the teacher client 10A, but the transmission / reception control unit 31a of the server 30 may generate the group ID. For example, when the transmission / reception control unit 31a receives a group setting message from the teacher client 10A, the transmission / reception control unit 31a generates a group ID by a known method, and generates the generated group ID and the client ID included in the message. A group list 32 b is generated in association with each other and stored in the storage unit 32. Further, the transmission / reception control unit 31a transmits the generated group ID to the teacher client 10A, and the message reception unit 13b of the teacher client 10A associates the transmitted group ID with the client ID, as shown in FIG. The same group list is generated and stored in the storage unit 14.

DESCRIPTION OF SYMBOLS 1 Information output sharing system 10 Client 10A Teacher client 10B Student client 11 Input part 12 Output part 13, 31 Control part 13a Message transmission part 13b Message reception part 14, 32 Storage part 15, 33 Network IF
30 server 31a transmission / reception control unit 32a client list by URL 32b group list 32c processing target list in server 32d transfer rule table 40 network

According to the information output sharing system according to claim 1 or the information output sharing program according to claim 3 , operation content specifying information for specifying an operation that causes a change in the output content in the output means of the client is included. Since the message is transferred to another client and the operation is executed by the other client, the processing load on the client and the server can be reduced as compared with the case where the output content itself such as image data is transferred. The load on the network can be reduced. For this reason, the information output sharing process can be executed at a higher speed than before, and the real-time property and convenience in information output sharing can be improved. Further, since the message transfer destination is mainly specified by the server, it is possible to reduce the load on the client.

Claims (6)

An information output sharing system configured by connecting a plurality of clients and servers via a network so that they can communicate with each other.
Each of the plurality of clients is
When an operation that causes a change in the output content of the output means of the client is performed via the input means of the client, a message including operation content specifying information for specifying the operation is generated and sent to the server Message sending means for sending;
When the message is received from another client via the server, the operation specified by the operation content specifying information included in the message is changed to change the output content in the output means of the client Message receiving means to be executed as
The server
When the message is received from the client, it comprises a transmission / reception control means for transferring the message to another client,
Each of the plurality of clients or at least one of the servers is
Transfer destination specifying information storage means for storing transfer destination specifying information for specifying a transfer destination of the message;
When the message is received from the client, the client to be a transfer destination of the received message is specified based on the transfer destination specifying information stored in the transfer destination specifying information storage unit, and the specified Transfer control means for performing predetermined control so that the message is received at the client,
Information output sharing system. The transfer destination specifying information storage means is a group list configured by associating a client ID for uniquely identifying the client and a group ID for uniquely identifying a group constituted by the clients. , And group specifying information storage means for storing
When the transfer control unit receives the message from the client, the transfer control unit acquires a client ID corresponding to the group ID included in the message from the group specifying information storage unit, and based on the acquired client ID, Identify the client to which the received message should be forwarded,
The information output sharing system according to claim 1. The server includes the transfer destination specifying information storage unit and the transfer control unit,
The forwarding destination specifying information storage means of the server is
URL-specific client specifying information storage means for storing a URL used when the client connects to the server and a client list for each URL configured by associating the types of the clients with each other;
Transfer rule specifying information storage means for storing a transfer rule table configured by associating the type of client of the message transmission source and the type of client that is a candidate for the transfer destination of the message. And
The transfer control means of the server includes:
When the message is received from the client, the type of the client corresponding to the URL used when the client connects to the server is specified by referring to the client-specific information storage unit for each URL. Identify the type of client from which
Identifying the type of client that is a message transfer destination candidate corresponding to the type of client of the identified message transmission source with reference to the transfer rule specifying information storage unit,
A URL corresponding to the type of client that is a candidate for the destination of the specified message is specified with reference to the client-specific information storage unit for each URL,
Based on the specified URL, the client to be the transfer destination of the received message is specified.
The information output sharing system according to claim 1 or 2. The server forwards a message received from the client to the plurality of clients;
The client includes the transfer destination specifying information storage unit and the transfer control unit,
The transfer destination specifying information storage unit of the client stores a client ID for uniquely identifying the client,
When the transfer control unit of the client receives the message from the server, the transfer control unit specifies whether or not the client ID included in the message matches the client ID stored in the transfer destination specifying information storage unit. If they match, identify the client as the client to which the received message should be forwarded,
The information output sharing system according to claim 1 or 2. An information output sharing program executed on a server configured to be communicably connected to a plurality of clients via a network,
The server includes transfer destination specifying information storage means for storing transfer destination specifying information for specifying a transfer destination of the message when transferring a message transmitted from any of a plurality of clients to the other client. Prepared,
The forwarding destination specifying information storage means is
URL-specific client specifying information storage means for storing a URL used when the client connects to the server and a client list for each URL configured by associating the types of the clients with each other;
Transfer rule specifying information storage means for storing a transfer rule table configured by associating the type of client of the message transmission source and the type of client that is a candidate for the transfer destination of the message. And
The server,
When the message is received from the client, transmission / reception control means for transferring the message to another client;
When the message is received from the client, the client to be a transfer destination of the received message is specified based on the transfer destination specifying information stored in the transfer destination specifying information storage unit, and the specified Function as transfer control means for performing predetermined control so that the message is received at the client,
The transfer control means includes
When the message is received from the client, the type of the client corresponding to the URL used when the client connects to the server is specified by referring to the client-specific information storage unit for each URL. Identify the type of client from which
Identifying the type of client that is a message transfer destination candidate corresponding to the type of client of the identified message transmission source with reference to the transfer rule specifying information storage unit,
A URL corresponding to the type of client that is a candidate for the destination of the specified message is specified with reference to the client-specific information storage unit for each URL,
Based on the specified URL, the client to be the transfer destination of the received message is specified.
Information output sharing program. An information output sharing program executed by each of a plurality of clients configured to be communicably connected to a server via a network,
The client,
When an operation that causes a change in the output content of the output means of the client is performed via the input means of the client, a message including operation content specifying information for specifying the operation is generated and sent to the server Message sending means for sending;
When the message is received from another client via the server, the operation specified by the operation content specifying information included in the message is changed to change the output content in the output means of the client Function as message receiving means to execute as
Information output sharing program.

Images