JP2008217138A - Server device, client device, server control program, and client control program for server-based computing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To store screen data generated and transferred in a server device, and to independently browse and use them, without impairing an advantage inherent in a system in a server-based computing system. <P>SOLUTION: A storage permission setting management file performing setting management of permission/forbiddance of storage in a client device 20 about a data file generated by an application program startable/executable in the server device 10 according to an input event from the client device 20 is stored and managed in the server device 10. When a request of the storage according to user operation about display screen data generated in the server device 10 according to the input event from the client device 20, transferred to the client device 20, and displayed is inputted, a storage permission confirmation request added with an ID of the display screen data is transmitted to the server device 10, and "storage OK" or "storage NG" is confirmed and decided based on the storage permission setting management file. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a server / client system connected via a network such as a LAN (Local Area Network), and operates all applications input / output / displayed on the client device on the server device. The present invention relates to a server device, a client device, a server control program, and a client control program of the server-based computing system.

  Conventionally, in each PC terminal connected to a network such as an in-house LAN, the individual PC terminal independently starts and executes an application such as document creation or table creation, and various files generated in association with this start up and execution. The data is stored in its own storage device in the PC terminal, or stored in an external storage medium such as a magnetic disk, an optical disk, or a small semiconductor memory, or transferred to and stored in a storage device managed by a server device on the network.

  In such a conventional server / client system, the generated files are managed in each PC terminal itself. Therefore, if the PC terminal is lost or illegally taken out and put into the hands of a third party, the stored file is saved. May be read out and important information and confidential information may be leaked.

  In addition, if each PC terminal starts and executes an application independently, it is necessary to update, change, and add the application for each PC terminal, which is cumbersome and expensive. .

  For this reason, in recent server client systems, all applications that are input / output and displayed on each PC terminal (client device) are started and executed on the server device, and all generated files associated with this are also executed on the server device side. An SBC (Server Based Computing) system that is managed is introduced (see, for example, Patent Document 1).

In such a server-based computing system, drawing data of application software executed on the server side is transferred to the client device, and the drawing data is simply displayed on the client device.
JP 2004-171063 A

  As described above, in the server-based computing system, all applications that are input / output / displayed on the client device are started and executed on the server device, and all generated files associated therewith are also managed on the server device side. Therefore, even if the client device is lost or illegally taken into the hands of a third party, no saved file will be read, and important or confidential information may be leaked Will disappear.

  However, since the client device cannot be used at all in an environment outside the network where connection with the server device is not possible, even when a document image for presentation is created using the server device, for example, It cannot be taken out and displayed on the customer side for explanation.

  Therefore, it is conceivable that the file desired by the user of the client device created in the server-based computing system is simply stored in the client device and browsed alone. However, this makes it impossible to prevent important information from being leaked, and it must be taken into the client device together with the saved file and an application program for opening and displaying the file. There is a problem.

  An object of the present invention is made in view of such a problem, and screen data generated and transferred by a server device is stored on a client device and browsed and used independently without losing the original advantages of the system. The present invention provides a server device, a client device, a server control program, and a client control program of a server-based computing system that enables the above.

  The first server device of the server-based computing system according to the present invention includes management information storage means for storing management information in which whether or not the screen information transmitted to the client device can be stored in the client device is stored; Confirmation request receiving means for receiving a confirmation request for whether or not to save the transmitted screen information from the client device, and when the confirmation request for saving or not is received by the confirmation request receiving means, the management information storage means A storage availability determination unit that determines whether storage is possible based on the stored management information, and a determination result of transmitting to the client device a determination result of whether storage is possible for the transmitted screen information determined by the storage availability determination unit And a transmission means.

  In the first server device of the server-based computing system according to the present invention, the management information sets whether or not the screen information transmitted to the client device can be stored in the client device in units of users. It is characterized by management information.

  In the first server device of the server-based computing system according to the present invention, the management information is input from the client device as to whether or not the screen information transmitted to the client device can be stored in the client device. The management information is set for each application that is activated in response to the above.

  In the first server device of the server-based computing system according to the present invention, the management information is input from the client device as to whether or not the screen information transmitted to the client device can be stored in the client device. The management information is set in units of files generated in accordance with an application activated in response to the above.

  In the first server device of the server-based computing system according to the present invention, the management information is input from the client device as to whether or not the screen information transmitted to the client device can be stored in the client device. Management information set in units of data in the screen information generated according to an application activated in response to the application.

  Further, the first server device of the server-based computing system according to the present invention is configured such that, in the storage availability determination unit, the data unit in the screen information is based on the management information stored by the management information storage unit. When it is determined that the storage is prohibited, the information processing unit further includes a position information acquisition unit that acquires position information in the screen information of the data unit for which the storage is prohibited, and the determination result transmission unit includes the storage result determination unit. When the prohibition of saving in units of data is determined by the above, the location information in the screen information in the unit of data acquired by the location information acquisition means is prohibited for saving the transmitted screen information. It transmits to the said client apparatus with the judgment result of prohibition, It is characterized by the above-mentioned.

  The second server device of the server-based computing system according to the present invention includes management information storage means for storing management information in which whether or not the screen information transmitted to the client device can be stored in the client device is stored; Confirmation request receiving means for receiving a confirmation request for whether or not to save the transmitted screen information from the client device, and when the confirmation request for saving or not is received by the confirmation request receiving means, the management information storage means A storage permission determination unit that determines whether storage is possible based on the stored management information, and when the storage information determination unit determines that storage of the partial area of the transmitted screen information is prohibited, the transmitted screen Partial concealment processing means for concealing a partial area of information, and partial concealment processing by this partial concealment processing means It is characterized in that a storage information transmitting means for transmitting to have been the client device as information to be stored screen information.

  The client device of the server-based computing system according to the present invention includes a screen information receiving unit that receives screen information generated by the server device, and whether or not the screen information received by the screen information receiving unit can be stored. A confirmation request transmitting means for transmitting a confirmation request to the server apparatus; and a determination result of whether or not storage is possible, which is transmitted from the server apparatus in response to the storage permission confirmation request transmitted by the confirmation request transmitting means. A determination result receiving means; and a save permission / inhibition corresponding processing means for storing or not saving the screen information received from the server device based on the determination result of the save permission received by the determination result receiving means. It is characterized by having prepared.

  Further, in the client device of the server-based computing system according to the present invention, the storage permission / inhibition correspondence processing means includes the determination result of storage permission received by the determination result receiving means accompanied with the determination result of storage prohibition. When the received screen information is position information in data units, concealment processing means for concealing the received screen information according to the position information of the data units, and concealment processing in data units by the concealment processing means Screen information storing means for storing the screen information stored.

  Further, in the client device of the server-based computing system according to the present invention, the storage permission / inhibition processing means has an external transfer storage control means for transferring and storing the screen information to be stored to an external device. It is characterized by.

  According to the present invention, a server-based computing system in which screen data generated and transferred by a server device can be stored by a client device and can be browsed and used independently without losing the original advantages of the system. Server apparatus, client apparatus, server control program, and client control program can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration of a server-based computing system including a server device 10 and client devices 20 (20P, 20M),... According to an embodiment of the present invention.

  This server-based computing system includes a server device 10 and a plurality of client devices 20 (20P, 20M),... Connected on a network N composed of a LAN (Local Area Network) or a WAN (Wide Area Network). .

  The client device 20 is, for example, a personal computer wired on the network N, 20P is a portable personal computer wirelessly connected via an access point AP on the network N, and 20M is wireless via the access point AP. It is a connected mobile phone.

  An OA peripheral device such as a FAX 20F or a printer (not shown) is also connected to the network N of this server-based computing system.

  The server device 10 has various application programs such as a document creation processing program, a spreadsheet processing program, an address book program, a notepad program, a presentation material creation program, a mail processing program, an Internet connection processing program, and a Web display program. , The client device 20 (20P, 20M) connected to the server device 10 is activated in response to an operation input (input event) signal from the client device 20 (20P, 20M),.

  In this server device 10, the display output drawing data generated in accordance with the execution of the application program according to the operation input signal from the client device 20,... Is transferred by the built-in accelerator circuit 10A (see FIG. 2). Are converted into drawing data for use, compressed and encrypted (hereinafter referred to as encoding), and transmitted (transferred) to the client device 20 of the access source.

  In the client devices 20 (20P, 20M),..., The drawing data transferred from the server device 10 is decompressed and decoded (hereinafter referred to as decoding) in the accelerator circuit 20A (see FIG. 3) in each client device. And displayed on the display device 26.

  That is, each of the client devices 20 (20P, 20M),... In this server-based computing system has an input function corresponding to a user operation such as a keyboard and a mouse, and an output such as an LCD display unit (26) and a printer. It has functions as main functions and does not have at least various application functions and data file management functions that the server device 10 has.

  And the data file produced | generated with the various processes started and performed in the server apparatus 10 according to the operation input (input event) signal from the client apparatus 20 ... is fundamentally in the said server apparatus 10. Alternatively, it is stored and stored for each user account or as a shared file in a storage device such as a magnetic disk managed and managed by the server device 10.

  On the other hand, the client device 20 causes the display device 26 to display the drawing data generated and transferred by the server device 10 in response to an operation input (input event) at the client device 20 as display screen data. Along with this, the server device 10 is also checked for permission to save the display screen data in response to a user operation, and has a function of recording and saving only display screen data permitted to be saved in the memory and displaying it alone.

  FIG. 2 is a block diagram showing a circuit configuration of the server device 10 in the server-based computing system.

  The server device 10 includes a CPU 11 serving as a computer. The CPU 11 is connected to a ROM 13, a RAM 14, and a display device 15 via a bus 12, and is connected to the accelerator circuit 10 </ b> A. A VRAM 16 is mounted on the accelerator circuit 10A.

  The CPU 11 also has an input unit 17 such as a keyboard and a mouse, an external storage HDD (Hard Disk Drive) 18, a transmission / reception control unit 19 with the client device 20, and a real-time counter that outputs the current time over time. RTC) 11T is connected.

  The CPU 11 controls the operation of each part of the circuit by using the RAM 14 as a working memory in accordance with a system program or various application programs stored in advance in the ROM 13. The various programs are activated and executed in response to processing command signals corresponding to user operations (input events) from the client devices 20 (20P, 20M),.

  In this server device 10, various data generated according to an application program that is activated and executed in response to an input event signal from the client device 20 is stored in the external storage HDD 18 in association with the user ID, for example. . The screen data for display is converted into drawing data for transfer obtained by extracting the image change portion (difference) between the previous screen data and the current screen data using the VRAM 16 in the accelerator circuit 10A. 20 is transferred to display.

  Further, the contents of application programs started and executed for each client device 20 (20P, 20M),... In the server device 10 and the file display status thereof are stored in the application management information 14A (FIG. 4 (FIG. 4)). A1) (see A2)). Further, as the application program is started and executed, the state of the display screen generated and updated in response to the input event signal from the client device 20 is the screen update information 14B written in the RAM 14 (FIG. 4 (B1) ( (See B2)).

  In the RAM 14 of the server device 10, the display screen data generated in response to the input event signal from the client device 20, transferred to the client device 20, and displayed for display permission (OK) / storage prohibited (NG) ) For each user, a storage permission setting management file 14X (see FIG. 5) is provided.

  FIG. 3 is a block diagram showing a circuit configuration of the client device 20 (20P, 20M) in the server-based computing system.

  The client device 20 includes a CPU 21 as a computer, to which a ROM 23 and a RAM 24 are connected via a bus 22 and an accelerator circuit 20A is connected. The accelerator circuit 20A is equipped with a VRAM 25, and display screen data written in the VRAM 25 is output to the display device 26 and displayed.

  Further, the CPU 21 has various input devices such as an input unit 27 such as a keyboard and a mouse, an external storage HDD (Hard Disk Drive) 28, an authentication device, a barcode reader, a CCD camera, a printer, and a wireless device via the bus 22. A USB / parallel / serial interface 30 for connecting the terminal 29, a transmission / reception control unit (wired / wireless) 31 with the server device 10, and a real-time counter (RTC) 21T for outputting the current time over time are connected.

  The CPU 21 uses the RAM 24 as a working memory in accordance with a system program stored in advance in the ROM 23 to control the operation of each part of the circuit. The server 21 receives a key input signal from the input unit 27 and the transmission / reception control unit 31. The system program is activated and executed in accordance with an application response signal from 10, transfer drawing data, and the like.

  In the client device 20, the display drawing data generated and transferred by executing the application program in the server device 10 is decoded by the accelerator circuit 20A, written as display screen data in the VRAM 25, and displayed on the display device 26. The

  At this time, the client device 20 confirms with the server device 10 whether the display screen data is transferred from the server device 10 and displayed on the display device 26 according to a user operation. When the storage permission is confirmed, the RAM 14 and the external storage HDD 28 are written and stored. The stored display screen data is selectively read as it is in response to a user operation and displayed on the display device 26.

  In this server-based computing system, the display screen data generated by the server device 10 in response to an event such as a key input from the client device 20 is updated every time the screen data is generated and updated. The difference in the area where the image has changed is extracted and transferred to the client device 20 as transfer drawing data. Then, only the image change area is sequentially rewritten with respect to the display screen data already displayed on the client device 20, and the display is updated. As a result, the amount of data transferred from the server device 10 to the client device 20 is greatly reduced.

  FIG. 4 is a diagram showing specific examples of the application management information 14A and the screen update information 14B stored and managed in the server device 10. FIGS. 4A and 4A show the data format configuration and application management information 14A. FIGS. 5A and 5B are diagrams showing the data contents according to this, and FIGS. 5B and 5B are diagrams showing the configuration of the data format of the screen update information 14B and the data contents according to the data format.

  The application management information 14A is generated and stored for each client device 20 that is accessing the server device 10 and, as shown in FIGS. 4A1 and 4A2, in response to an application activation event from the client device 20. “App state number” that is a serial number generated each time the application is started, “state change time” that indicates the change time of the display state of the application, and “application start number” that is the number of applications that are simultaneously started , “Delimiter” that is a delimiter of management information, “Started application name” that is the name of the started application, “File open information” that is a file name opened by the started application, and the same file name Combined with “display status” to show / hide files Composed of Te.

  In the application management information 14A, the application activation information portion including “activation application name”, “file open information”, and “display state” after the “delimiter” has a change in the display state of the application (for example, a new application Is added to the application activation information portion of the application that is already running.

  The screen update information 14B is generated and stored every time the display screen data corresponding to the input event signal from the client device 20 is updated. As shown in FIGS. 4B1 and 4B, the display update data 14B is displayed. “Screen Data ID” that is a unique number (for example, serial number) that is generated at each update, “Screen Update Time” that is the screen update time, and the status of the application that is running at the time of the screen update "Application state number" incorporated in the application management information 14A to be attached, and "display update data" which is the contents (drawing command, area information, image data, etc.) of the updated display screen data Is done.

  In the screen update information 14B, each display screen data managed in association with the “screen data ID” is linked to the application management information 14A by the “application state number” as indicated by an arrow R. Thus, it is possible to specify “start application name (application name)” and “file open information (file name)” in which the display screen data of the “screen data ID” is generated.

  FIG. 5 is a diagram showing a specific example of the storage permission setting management file 14X stored and managed in the server device 10.

  This save permission setting management file 14X indicates save permission (OK) / prohibit save (NG) of display screen data transferred and displayed for each user of the client device 20 (20P, 20M)... The range to be set and managed, and the target of the storage permission (OK) / storage prohibition (NG) is first in units of users, in units of applications in which the display screen data is generated, units of files, and units of items in the data. Settings are managed.

  That is, with respect to the display screen data generated by the server device 10 and transferred to the client device 20 in response to an input event from the client device 20 authenticated by the user name and the password, the client device 20 Whether or not the image can be saved is determined from the “screen data ID” of the display screen data “application state number” managed by the screen update information 14B and the application management information 14A → “launch application name (application Name) "" File open information (file name) "can be searched and confirmed in the save permission setting management file 14X.

  Next, operations of the server device 10 and the client devices 20 (20P, 20M),... In the server-based computing system according to the first embodiment having the above-described configuration will be described.

  FIG. 6 is a flowchart showing a screen update process in the server device 10.

  First, the generation and update of display screen data to be generated and transferred to the client device 20 in response to an input event signal from the client device 20, such as drawing processing information from the application that generated the display screen data, etc. Recognized by the occurrence of a screen update command event (step S1).

  Then, in the accelerator circuit 10A, a difference (image change portion) between the display screen data generated and updated this time and the display screen data generated last time is compared and extracted (steps S2 and S3), and the difference (image change portion) is extracted. ) Transfer drawing data for display updating, which includes an image and area position (coordinate) information in the display screen, is generated (step S4).

  At the same time, a unique “screen data ID” (for example, serial number) corresponding to the current display screen data is generated (step S5).

  Then, the current “application state number” is acquired from the application management information 14A in the RAM 14 shown in FIGS. 4A1 and 4A2 (step S6), as shown in FIGS. 4B1 and 4B2. Screen update information 14B is generated and stored (step S7).

  The display update data obtained by adding the screen data ID generated in step S5 to the transfer drawing data generated in step S4 is transmitted to the client device 20 via the transmission / reception control unit 19. (Step S8).

  As a result, in the client device 20, the drawing data included in the display update data received from the server device 10 is rewritten in accordance with the area position (coordinate) information with respect to the display screen data that has already been displayed. The display is updated.

  FIG. 7 is a display state diagram showing the setting operation of whether or not to save the display screen according to the user operation on the save permission setting management file 14X stored and managed in the server device 10.

  The input unit 17 is operated in the server device 10 to display a file list window W1 on the display device 15 as shown in FIG. 7A, for example, and as shown in FIG. And the property window W2 is displayed.

  Then, by operating a “remote user storage setting” button K1 provided in the property window W2, whether to save the display screen data corresponding to the selected file is set for each user as shown in FIG. 7C. To display a remote user storage setting window W3.

  In this remote user save setting window W3, by checking a check box, the save permission of the display screen data corresponding to the selected file is set, and by operating the “user edit” button K2, the save permission is set. User editing settings can be set.

  As a result, as shown in FIG. 7D, a file list in which storage permission is set for each user is generated, and stored in the RAM 14 as the storage permission setting management file 14X as shown in FIG. Will come to be.

  In the description of the setting operation for whether or not to save the display screen, the setting for whether or not to save the display screen data in units of files has been described. However, the setting of whether or not to save the display screen data in units of users, applications, or items in the display screen data Of course, it is also possible to carry out. For example, the setting operation for each application can be realized only by changing the selection of the file to be set to the selection of the application.

  The setting operation for each item in the display screen data and the specific storing operation will be described in a second embodiment to be described later.

  FIG. 8 is a flowchart showing storage control processing between the server apparatus 10 and the client apparatus 20 when the display screen data is stored in the client apparatus 20, and FIG. The flowchart showing the storage confirmation process, and FIG. 5B is a flowchart showing the data storage process in the client apparatus 20.

  FIG. 9 is a display state diagram showing a storing operation accompanying the data storing process in the client device 20.

  For example, as shown in FIG. 9A, in the client device 20, the “spreadsheet” application program in the server device 10 is activated, transferred, and included in the “November sales.dat” file. When the "screen save" instruction operation is performed in a state where the display screen data G of the "digital camera price list" is displayed on the display device 26, first, it is added to the display update data serving as the base of the display screen data G. "Screen data ID" (for example, "1000") is acquired (step B1).

  Then, based on the acquired “screen data ID (1000)”, a storage permission confirmation data packet for confirming whether or not the display screen data G can be stored is generated (step B2). (Step B3).

  At this time, on the display device 26 of the client device 20, for example, as shown in FIG. 9B, a response waiting window W11 displaying a dialog “Checking with server” is displayed (step B4). (Step B5).

  In the server device 10, when the storage permission confirmation data packet generated and transmitted by the client device 20 is received (step A1), the received storage permission confirmation data packet is analyzed and becomes a target of the storage permission confirmation request. "Screen data ID (1000)" is acquired (step A2).

  Then, based on the acquired “screen data ID (1000)”, the screen update information 14B stored and managed in the RAM 14 is referred to as shown in FIG. “Display update data” is specified, and “application state number (0001)” corresponding to the specified “display update data” is acquired, and the application management information 14A is referred to, and the activated application name “spreadsheet” And the file name “November sales.dat” is specified (step A3).

  Then, for the startup application name “spreadsheet” and the file name “November sales.dat” corresponding to the display screen data that is the target of the storage permission confirmation request specified according to the screen information 14B and the application management information 14A, As shown in FIG. 5, the storage permission setting management file 14X that is set and managed in the RAM 14 is referred to according to the user name and password at the time of connection authentication of the client device 20, and the startup application name “spreadsheet” or It is confirmed whether or not the file name “November sales.dat” is set as “Save prohibited application name” or “Save prohibited file name” (step A4).

  Then, the state is awaiting confirmation of the storage permission determination result (step A5). For example, the file name “November sales.dat” corresponding to the display screen data subject to the storage permission confirmation request is “storage prohibited file name”. If it is determined that it is not set, a storage permission notification packet indicating “storage permission (OK)” is generated (step A6), and a response is transmitted to the client device 20 that is the confirmation request source (step A7). ).

  When the storage permission notification packet (OK) transmitted as a response by the server device 10 is received in the client device 20 (step B5), the response waiting window W11 displayed as shown in FIG. 9B is displayed. Is deleted and displayed (step B6), the received storage permission notification packet (OK) is analyzed (step B7), and it is determined whether it is "save OK" or "save NG" (step B8).

  Here, when it is determined that “save is OK” (step B8 (Yes)), as shown in FIG. 9A, the display of the “digital camera price list” displayed on the display device 26 is displayed. The screen data G is stored in a folder requiring user authentication in the RAM 14 or the external storage HDD 18 after security is secured by encryption processing, division processing, or the like (step B9).

  If it is determined that “save NG” (step B8 (No)), the display screen data G displayed on the display device 26 and requested to be saved is not saved.

  Then, on the display device 26, for example, as shown in FIG. 9C, a saving result window W12 displaying a dialog meaning “screen data saving” or “screen data saving prohibited” is displayed, and the saving result is displayed. The user is notified (step B10).

  FIG. 10 is a display state diagram showing a browsing operation associated with the stored data browsing process in the client device 20.

  When the client device 20 is activated, first, as shown in FIG. 10A, a “server connection” button K21 for connecting to the server device 10 and a “stored data browsing” button K22 for browsing stored data offline. Is initially displayed on the display device 26.

  In the activation method selection window W21, when the user selects the “browse stored data” button K22, as shown in FIG. 10B, user authentication for requesting input of a user name and password for ensuring security is performed. A window W22 is displayed.

  In the user authentication window W22, when the user name and password are input and it is determined that the authentication is OK, display screen data stored in the RAM 14 or a folder requiring user authentication in the external storage HDD 18 is read out. As shown in FIG. 10C, a stored data list window W23 is displayed in which each display screen data is displayed as a thumbnail image SM1, SM2,.

  When a user-desired thumbnail image SMn is selected and input in the saved data list window W23, display screen data G corresponding to the selected thumbnail image SMn is read out, for example, as shown in FIG. As shown, it is viewed and displayed in the normal display size.

  Therefore, according to the data storage / browsing function by the server device 10 and the client device 20 of the first embodiment in the server-based computing system having the above configuration, the server device 10 is activated in response to an input event from the client device 20. The server device 10 stores and manages a storage permission setting management file 14X for setting and managing storage permission / prohibition in the client device 20 for a data file generated by an executable application program. When a storage request is input in response to a user operation for display screen data generated in the server device 10 in response to an input event from the client device 20 and transferred to the client device 20 and displayed, A storage permission confirmation request to which the ID of the display screen data is added is transmitted to the server device 10, and “save OK” or “save NG” is confirmed based on the storage permission setting management file 14X.

  As a result, only the display screen data for which storage permission is set in advance in the server device 10 can be selectively stored on the client device 20 side, and can be browsed and displayed by the client device 20 alone. It is possible to surely prevent the leakage. In addition, since the display screen data itself is stored and simply browsed and displayed, it is not necessary to load the client apparatus 20 with an application program for opening and displaying the file.

  Therefore, the display screen data generated and transferred by the server device 10 can be stored and browsed independently without losing the original data security of the server-based computing system and the advantages of the thin client. become.

  In the data storage / browsing function by the client device 20 of the first embodiment, whether to save the display screen data generated by the server device 10 is set for each user, each application, and each file. The display screen data itself belonging to the user, application, or file to which “Save prohibited” is set can be “Saved” and “Save prohibited”. However, the data saving / viewing function of the second embodiment will be described below. As explained, for each data item described in the display screen data, set "Save permission" and "Save prohibition", and selectively hide or fill only the "Save prohibited" data item part. It is good also as a structure which can be preserve | saved and browsed.

(Second Embodiment)
FIG. 11 is a functional block diagram showing the configuration of the server device 10 ′ of the second embodiment in the server-based computing system.

  The server device 10 ′ starts and executes an application program corresponding to an input event from the client device 20, and the display screen data generated and transferred to the client device 20 by the application processing unit 31 A. The storage device includes a storage permission management processing unit 33 for setting and managing storage permission / inhibition in the client device 20 and a communication processing unit 34 for performing communication with the client device 20.

  The application processing unit 31A has a data creation / editing function 31a, a registration function 31b, a display function 31c, and a display management function 31d, and generates / edits data with a database (DB) including the RAM 14 and the external storage HDD 18. Registration / deletion / search / change processing of the recorded data is performed.

  The display management function 31d of the application processing unit 31A can manage areas for each item included in various data processed with the database (DB).

  The application processing unit 31 </ b> A includes a storage permission I / F (interface) 32 for the storage permission management processing unit 33. The storage permission I / F 32 includes a storage permission confirmation function 32a for confirming permission of data storage from the application program side, a DB name notification function 32b for confirming a DB name in the database (DB), and the database ( DB) for registering registered data, an item name notifying function 32c for notifying data items that can be individually saved, and notifying the status of display screen data generated by an application program that is currently activated / executed. Display state notification function 32d, and a display coordinate notification function 32e for notifying display coordinates of each data item area for display screen data generated by the application program.

  The storage permission management processing unit 33, with respect to the display screen data generated and edited by the application processing unit 31A, with respect to the storage permission setting management file 14X in units of data items for each user, each application, each file, and each application. Saving permission setting UI (user interface) 33a for setting saving permission / inhibition, saving permission status confirmation I / F 33b for checking / determining the setting state of saving permission / inhibition based on the saving permission setting management file 14X, and saving permission It has a discrimination I / F 33c.

  The communication processing unit 34 extracts a difference (image changing portion) between the previous screen data and the current screen data from the display screen data generated by the application processing unit 31A in response to an input event from the client device 20, and the client In addition to the basic function for generating the drawing data for transfer to the apparatus 20, the display confirmation request for the display screen data from the client apparatus 20 is received, the inquiry is sent to the storage permission management processing unit 33, and the storage permission determination result A storage permission confirmation reception function 34a and a storage permission management I / F 34b for acquiring the storage permission, and a determination result notification function 34c for notifying the client device 20 of the acquired storage permission determination result.

  Next, operations of the server device 10 ′ and the client devices 20 (20P, 20M),... In the server-based computing system of the second embodiment having the above configuration will be described.

  FIG. 12 is a flowchart showing storage permission setting management file update processing at the time of application installation in the server device 10 ′ of the second embodiment.

  When a new application program is installed in the ROM 13 via the external storage HDD 18 or the transmission / reception control unit 19, in the storage permission management processing unit 33, the installed application program includes a storage permission I / F 32. It is confirmed by inquiry to the application processing unit 31A (step J1).

  Here, if it is confirmed and determined that the newly installed application program has the storage permission I / F 32 (step J2 (Yes)), the application is inquired to the storage permission I / F 32. A list of data item names that are subject to storage permission setting is acquired (step J3).

  Then, for example, as shown in FIG. 5, item information in which a storage permission / storage prohibition attribute is added in association with the installed application name is additionally set in the storage permission setting management file 14X ( Step J4).

  FIG. 13 is a flowchart showing a storage permission setting management file update process according to a user (server administrator) operation in the server apparatus 10 ′ of the second embodiment.

  FIG. 14 is a diagram showing a display operation associated with the storage permission setting management file update process according to the user (server administrator) operation in the server apparatus 10 ′ of the second embodiment.

  First, the storage permission management processing unit 33 reads the storage permission setting management file 14X (see FIG. 5) (step L1) and, as shown in FIG. 14A, each application capable of setting storage permission / storage prohibition. A storage permission management application list window W31 that lists the names is displayed on the display device 15 (step L2).

  In this storage permission management application list window W31, when an application name (for example, “address book”) for which storage permission / storage prohibition is to be updated is selected and a “detailed setting” button is designated and input (step L3 → L4 (Yes)) ), The setting information of the current storage permission “OK” / storage prohibition “NG” for each data item associated with the application name “address book” is read from the storage permission setting management file 14X (see FIG. 5). (Step L7), as shown in FIG. 14B, a storage permission management detailed setting window W32 for detailed setting of storage permission (whether or not) for each data item is displayed (step L8).

  In the storage permission management application list window W31 shown in FIG. 14A, when an “end” button is input without selecting an application name and specifying an “detailed setting” button (step) L3 to L6), the storage permission setting management file update process is terminated.

  Then, in the storage address management detailed setting window W32 of the “address book” shown in FIG. 14B, storage permission for each data item is selected according to the operation of the user (server administrator). When the “OK” button is input (step L13 (Yes)), the storage permission for each data item at the time of inputting the “OK” button is (performed / not performed). Are reflected in the storage permission setting management file 14X (see FIG. 5) and updated (step L14).

  Thus, whether or not the storage permission setting management file 14X is updated according to the input of the “OK” button in the storage permission management detailed setting window W32 (step L14) or when the “Cancel” button is input ( Step L12 (Yes)), the display returns to the display state of the storage permission management application list window W31 shown in FIG. 14A (step L2).

  As a result, a storage permission setting management file 14X in which storage permission / storage prohibition is set for each data item generated for each application is generated and stored in the RAM 14.

  FIG. 15 is a flowchart showing storage permission inquiry response processing from the client device 20 in the server device 10 ′ of the second embodiment.

  In the state where the display screen data generated by the server device 10 ′ in response to an input event from the client device 20 is transferred to the client device 20 and displayed, the client communication processing unit 34 of the server device 10 ′ When the storage permission confirmation request for the display screen data from the client device 20 is received, the screen update information 14B shown in FIG. 4 is based on the screen data ID corresponding to the display screen data included in the storage permission confirmation request. In accordance with the application management information 14A, the storage permission management processing unit 33 confirms one or more currently activated application programs (step P1).

  Then, a storage permission setting management file 14X (see FIG. 5) is read from the RAM 14 (step P2), and whether or not one or a plurality of currently activated applications is set as a storage permission / storage prohibition target application. Judgment is made (step P3).

  Here, for example, when it is determined that the currently activated application program is “address book” and is set as a storage permission / storage prohibition target application (step P3 → P4), the “address book” It is determined whether or not there is an item set as a storage prohibition “NG” target for the data item included in the display screen data (step P5).

  Then, when it is determined that there is an item set as the object of the storage prohibition “NG” for the data item included in the display screen data of the “address book” (step P5 (Yes)), the storage prohibition “ An application whose display coordinates corresponding to the area of the target item “home address” in the current display screen data is “address book” based on the screen data ID for the first item “home address” that is the target of “NG” The processing unit 31A is inquired (step P6), and is in an acquisition waiting state (step P7).

  Here, when the display coordinates corresponding to the area of the target item “home address” of the storage prohibition “NG” included in the display screen data of the “address book” is acquired, the client device 20 that is the confirmation request source is notified. (Step P8).

  The display coordinates corresponding to the rectangular area of the target item for which storage is prohibited “NG” are the upper left start point coordinates PS (x, y) and the lower right end point coordinates PE (x, y) of the rectangular area. Consist only of.

  Then, it is determined whether or not there is a next item set as a target of the storage prohibition “NG” (step P9), and if it is determined that the target item “home phone number” exists (step P9 (Yes) )), The processing from step P6 onward is repeated, the display coordinates corresponding to the area of the second target item “home phone number” of the storage prohibition “NG” are acquired, and the client device 20 of the confirmation request source Is further added to the storage-prohibited area information for notification to (steps P6 to P8).

  Thereafter, when it is determined that there is no next item set as a storage prohibition “NG” target for the “address book” application (step P9 (No)), the next application that is currently running is further determined. When it is determined whether or not there is a next active application (step P10 (Yes)), the processing after step P4 is repeated, and the next active application As for the data items included in the display screen data at, it is determined whether or not there is an item that is set as a storage prohibition “NG” target (steps P10 → P4, P5).

  Thus, the display screen data for which the storage permission confirmation is requested from the client device 20 is set as a storage prohibition “NG” target among the data items by one or more applications included in the display screen data. When the display coordinates [PS (x, y) + PE (x, y)] of all item areas are acquired, this is the storage prohibition area information (area information for erasing or filling the storage prohibition area and hiding it) To the communication processing unit 34 and transmitted as a response to the client device 20 that is the confirmation request source (step P11).

  As a result, the client device 20 erases the storage prohibition item area of the display screen data that is currently being displayed and requested the storage permission confirmation, based on the storage prohibition area information received from the server apparatus 10 '. Alternatively, it is painted and stored.

  FIG. 16 is a diagram showing a display state of display screen data on the client device 20 accompanying the operation of the server device 10 ′ and the client device 20 in the server-based computing system of the second embodiment. (A) is a diagram showing a state in which display screen data G1 generated and transferred from the server device 10 'is displayed in a state of being connected to the server device 10', and (B) is a data item for which storage is prohibited. It is a figure which shows the display state by the independent browsing of the said client apparatus 20 of the display screen data G1 'preserve | saved in this way.

  For example, when an “address book” application program is activated and executed in the server device 10 ′ in response to an input event from the client device 20, as shown in FIG. 16A, “name” “company name” Display screen data G1 including data items of “company phone number”, “home phone number”, and “home address” is generated, transferred to the client device 20, and displayed on the display device 26.

  Here, as described above, when the save operation is performed on the display screen data G1 of the “address book” received and displayed by the client device 20, among the data items included in the display screen data G1, “home phone” is displayed. Regarding the areas of the two items of “number” and “home address”, the storage prohibited area information [PS1 (x, y) + PE1 (x, y)] obtained by the response to the storage permission confirmation request to the server device 10 ′. The painting process M is performed in accordance with [PS2 (x, y) + PE2 (x, y)], and is stored and saved as display screen data G1 ′ after managing the saving permission setting.

  As a result, when the display screen data G1 ′ stored and saved by the client device 20 alone is displayed, as shown in FIG. 16B, the item areas [PS1 (x, y) to PE1 (x , y)] [PS2 (x, y) to PE2 (x, y)] is displayed with the display screen data G1 ′ in a state where the filling process M is performed, and leakage of important information is prevented. The display screen data G1 ′ can be saved and viewed.

In the specific example of the display screen data G1 ′ in FIG. 16, the item areas [PS (x, y) to PE (x, y)] prohibited from being stored in the screen data generated based on one application program. Has been described. For example, as shown in FIG. 17A, a plurality (two in this case) of application programs 1.2. In the display screen data G2 constituted by arranging the windows W41 and W42 of the respective screen data generated based on the above, a part of the two windows W41 and W42 is overlapped, so that the storage set in the lower window W42 is set. When a part of the prohibited item area [PS (x, y) to PE (x, y)] is hidden by the upper window W41, as shown in FIG. Storage prohibited area information divided into two rectangular areas excluding the overlapping area MX
[PS1 (250,200) + PE1 (500,280)] [PS2 (200,280) + PE2 (500,300)]
The display screen data G2 that has been correctly filled only in the item area [PS (x, y) to PE (x, y)] that is prohibited to save can be saved easily. And browse.

  FIG. 17 shows that in the server apparatus 10 ′ and the client apparatus 20 of the server-based computing system according to the second embodiment, windows W41 and W42 corresponding to a plurality of applications overlap and a part of the item area for which storage is prohibited is hidden. FIG. 10 is a diagram for explaining a method for dividing and acquiring the area information [PS (x, y) to PE (x, y)] when the information is generated.

  Therefore, according to the data storage / viewing function by the server apparatus 10 ′ and the client apparatus 20 of the second embodiment in the server-based computing system having the above-described configuration, the server apparatus 10 ′ according to an input event from the client apparatus 20 A storage permission setting management file for setting and managing storage permission / prohibition in the client device 20 for each data item included in the display screen data for display screen data generated by an application program that can be started and executed in 14X is stored and managed in the server device 10 '. When a request for saving the display screen data generated by the server device 10 'in response to an input event from the client device 20, transferred to the client device 20, and displayed, is input in response to a user operation. Then, a storage permission confirmation request to which the ID of the display screen data is added is transmitted to the server device 10 ′, and “save OK” or “save NG” for each data item is confirmed based on the storage permission setting management file 14X. Is done. Then, for the data item of “Save NG”, the storage device is notified of the storage prohibited area information.

  As a result, the client device 20 stores the display screen data concealed by selectively painting the data items notified of the storage prohibition area information, and allows the client device 20 to browse and display alone. Therefore, leakage of important information can be surely prevented. In addition, since the display screen data itself is stored and simply browsed and displayed, it is not necessary to load the client apparatus 20 with an application program for opening and displaying the file.

  Therefore, the display screen data generated and transferred by the server device 10 can be stored and browsed independently without losing the original data security of the server-based computing system and the advantages of the thin client. become.

  In the server device 10 ′ and the client device 20 of the second embodiment in the server-based computing system, the display screen data to be stored according to the storage permission setting management file 14X stored in the server device 10 ′. When the storage of the specific data item is prohibited, the coordinate information indicating the storage prohibited item area in the display screen data is transmitted as a response to the client device, and the client device 20 receives the response of the prohibited storage item. The storage prohibited item area in the display screen data is erased or filled in according to the coordinate information indicating the area so as to be concealed and stored / viewed, but in response to a storage permission confirmation request from the client device 20 The server apparatus 10 'erases or paints the storage prohibited item area. Crushing process again generates a concealment processed display image data to M, may be configured to be saved and transfers to the client device 20.

  Further, in the server device 10 (10 ′) and the client device 20 in the server-based computing system of each of the embodiments, the display screen displayed on the client device 20 based on the application process in the server device 10 (10 ′). The case where data is stored by the client device 20 itself and later viewed alone has been described. However, according to the content of the response to the storage permission confirmation request from the client device 20 to the server device 10 (10 ′), the data is stored on the network N. A configuration may be adopted in which data is transferred to an OA peripheral device such as a certain FAX 20F or a printer (not shown) and stored in its internal memory or output to paper and stored.

  It should be noted that each processing method performed by the server apparatus 10 (10 ′) and the client apparatus 20 of the server-based computing system described in the above embodiments, that is, the server apparatus 10 (10 ′) shown in the flowchart of FIG. Screen update processing, data storage confirmation processing by the server device 10 of the first embodiment shown in the flowchart of FIG. 8A, data storage processing of the client device 20 of the first embodiment shown in the flowchart of FIG. 12 for a storage permission setting file update process at the time of application installation by the server apparatus 10 'of the second embodiment shown in the flowchart of FIG. 12, and a user (server administrator) operation by the server apparatus 10' of the second embodiment shown in the flowchart of FIG. Corresponding storage permission setting management file update processing, flow of FIG. Each method such as a storage permission inquiry response process by the server device 10 'of the second embodiment shown in the chart is a program that can be executed by a computer, such as a memory card (ROM card, RAM card, etc.), magnetic disk ( It can be distributed by storing in an external recording medium such as a floppy disk, hard disk, etc., optical disk (CD-ROM, DVD, etc.), semiconductor memory or the like. Then, the computer (CPU 11) (21) of the server device 10 (10 ′) or the client device 20 reads the program stored in the external recording medium into the storage device (13) (23), and operates according to the read program. Is controlled, the data storage / browsing function by the server device 10 (10 ′) and the client device 20 described in the above embodiments can be realized, and the same processing as described above can be executed.

  In addition, program data for realizing each of the above methods can be transmitted on a communication network (LAN) N in the form of a program code, and a computer device (program server) connected to the communication network (LAN) N The program data is taken in via the transmission / reception control units (19) and (31) and stored in the storage devices (13) and (23), and the above-mentioned server device 10 (10 ') and client device 20 store the data. A browsing function can also be realized.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. Further, each of the embodiments includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in each embodiment or some constituent features are combined, the problems described in the column of the problem to be solved by the invention can be solved. When the effects described in the column of the effect of the invention can be obtained, a configuration in which these constituent elements are deleted or combined can be extracted as an invention.

1 is a block diagram showing a configuration of a server-based computing system including a server device 10 and client devices 20 (20P, 20M),... According to an embodiment of the present invention. The block diagram which shows the circuit structure of the server apparatus 10 in the said server base computing system. The block diagram which shows the circuit structure of the client apparatus 20 (20P, 20M) in the said server base computing system. It is a figure which shows the specific example of the application management information 14A memorize | stored and managed in the said server apparatus 10, and the screen update information 14B, The figure (A1) (A2) followed the structure of the data format of application management information 14A, and this The figure which shows data content, The figure (B1) (B2) is a figure which shows the structure of the data format of the screen update information 14B, and the data content according to this. The figure which shows the specific example of the preservation | save permission setting management file 14X memorize | stored and managed in the said server apparatus 10. FIG. 5 is a flowchart showing screen update processing in the server device 10; The display state figure which shows the setting operation of the display screen preservation | save permission according to user (server administrator) operation with respect to the preservation | save permission setting management file 14X memorize | stored and managed in the said server apparatus 10. FIG. 5 is a flowchart showing a storage control process between the server apparatus 10 and the client apparatus 20 when the display screen data is stored in the client apparatus 20, and FIG. FIG. 3B is a flowchart showing data storage processing in the client device 20. FIG. 6 is a display state diagram showing a storage operation associated with a data storage process in the client device 20. The display state figure which shows the browsing operation | movement accompanying the stored data browsing process in the said client apparatus 20. FIG. The functional block diagram which shows the structure of server apparatus 10 'of 2nd Embodiment in the said server base computing system. The flowchart which shows the preservation | save permission setting management file update process at the time of application installation in the server apparatus 10 'of the said 2nd Embodiment. The flowchart which shows the preservation | save permission setting management file update process according to user (server administrator) operation in server apparatus 10 'of the said 2nd Embodiment. The figure which shows the display operation accompanying the preservation | save permission setting management file update process according to user (server administrator) operation in the server apparatus 10 'of the said 2nd Embodiment. The flowchart which shows the storage permission inquiry response process from the client apparatus 20 in the server apparatus 10 'of the said 2nd Embodiment. It is a figure which shows the display state of the display screen data in the said client apparatus 20 with the operation | movement of the server apparatus 10 'and the client apparatus 20 in the server-based computing system of the said 2nd Embodiment, The same figure (A). The figure which shows the state which displayed the display screen data G1 produced | generated and transferred from the said server apparatus 10 in the state connected with the server apparatus 10, The same figure (B) is the display screen which the data item of prohibition of a preservation | save was set and preserve | saved The figure which shows the display state by independent browsing of the said client apparatus 20 of the data G1 '. In the server device 10 ′ and the client device 20 of the server-based computing system of the second embodiment, when windows W41 and W42 corresponding to a plurality of applications overlap and a part of the item area prohibited to be stored is hidden. The figure explaining the method for dividing | segmenting and acquiring the area | region information [PS (x, y) -PE (x, y)].

Explanation of symbols

10, 10 '... Server device 20, 20M, 20P ... Client device 20F ... FAX
10A, 20A ... accelerator circuit 11, 21 ... CPU
11T, 21T ... Real-time counter (RTC)
12, 22 ... Bus 13, 23 ... ROM
14, 24 ... RAM
14A ... Application management information 14B ... Screen update information 14X ... Storage permission setting management file 15, 26 ... Display device 16, 25 ... VRAM
17, 27 ... Input unit 18, 28 ... External storage HDD
19, 31 ... Transmission / reception control unit 29 ... Various external devices 30 ... USB / parallel / serial interface 31A ... Application processing unit 31a ... Data creation / editing function 31b ... Registration function 31c ... Display function 31d ... Display management function 32 ... Save permission I / F
32a ... Storage permission confirmation function 32b ... DB name notification function 32c ... Item name notification function 32d ... Display state notification function 32e ... Display coordinate notification function 33a ... Storage permission setting UI (user interface)
33b ... Storage permission status confirmation I / F
33c ... Storage permission discrimination I / F
34 ... Communication processing unit 34a ... Storage permission confirmation reception function 34b ... Storage permission management I / F
34c ... Discrimination result notification function N ... Communication network AP ... Access point W1 ... File list window W2 ... Property window W3 ... Remote user save setting window W11 ... Response wait window W12 ... Save result window W21 ... Startup method selection window W22 ... User authentication Window W23 ... Saved data list window W31 ... Save permission management application list window W32 ... Save permission management detailed setting window W41, W42 ... Each screen data window by application K1 ... "Remote user save setting" button K2 ... "User edit" button K21 ... "Server connection" button K22 ... "Saved data browsing" button G, G1, G1 '... Display screen data M ... Filling process MX ... Overlapping area

Claims (12)

A server device for a server-based computing system,
Management information storage means for storing management information for setting whether or not the screen information transmitted to the client device can be saved in the client device;
Confirmation request receiving means for receiving a confirmation request for whether or not to save the transmitted screen information from the client device;
A storage availability determination unit that determines whether storage is possible based on the management information stored by the management information storage unit when a confirmation request for storage availability is received by the confirmation request reception unit;
A determination result transmitting means for transmitting to the client device a determination result of whether or not storage is possible for the transmitted screen information determined by the storage permission determination means;
A server device for a server-based computing system, comprising:   The server-based computing according to claim 1, wherein the management information is management information in which whether or not the screen information transmitted to the client device can be stored in the client device is set for each user. System server device.   The management information is management information in which screen information transmitted to the client device is set in units of applications that are activated in response to an input from the client device. Item 2. A server device for a server-based computing system according to Item 1.   The management information is management information in which screen information transmitted to the client device is set in units of files generated according to an application that is activated in response to an input from the client device as to whether the client device can save the screen information. The server device of the server-based computing system according to claim 1.   The management information sets whether or not the screen information transmitted to the client device can be saved in the client device in units of data in the screen information generated according to an application activated in response to an input from the client device. The server apparatus of the server-based computing system according to claim 1, wherein the server apparatus is management information. The screen of the data unit that is prohibited to be saved when the prohibition of saving in the data unit in the screen information is determined in the saving information determination unit based on the management information stored in the management information storage unit. It further comprises position information acquisition means for acquiring position information in the information,
The determination result transmission unit includes a unit of data in the screen information in the unit of data acquired by the position information acquisition unit that is prohibited from storage in the unit of data when the unit of storage is determined to be in the storage unit. Transmitting the position information to the client device together with the determination result of prohibition of storage of the transmitted screen information;
The server device of the server-based computing system according to claim 5. A server device for a server-based computing system,
Management information storage means for storing management information for setting whether or not the screen information transmitted to the client device can be saved in the client device;
Confirmation request receiving means for receiving a confirmation request for whether or not to save the transmitted screen information from the client device;
A storage availability determination unit that determines whether storage is possible based on the management information stored by the management information storage unit when a confirmation request for storage availability is received by the confirmation request reception unit;
A partial concealment processing means for concealing a partial area of the transmitted screen information when it is determined that storage of the partial area of the transmitted screen information is determined by the storage possibility determination unit;
Storage information transmitting means for transmitting to the client device as information to be stored, the screen information in which the partial area is concealed by the partial concealment processing means;
A server device for a server-based computing system, comprising: A client device of a server-based computing system,
Screen information receiving means for receiving screen information generated by the server device;
Confirmation request transmitting means for transmitting a confirmation request for whether or not to save the screen information received by the screen information receiving means to the server device;
A determination result receiving means for receiving a determination result of whether or not storage is possible sent from the server device in response to the confirmation request for whether or not storage is possible sent by the confirmation request transmitting means;
Based on the determination result on whether or not storage can be received by the determination result receiving unit, a storage permission / inhibition corresponding processing unit that performs processing for storing or not storing the screen information received from the server device;
A client device of a server-based computing system, comprising: The storage permission / inhibition correspondence processing means includes:
In a case where the determination result on whether or not storage is possible received by the determination result receiving means is position information of a data unit for the received screen information accompanied by a determination result on prohibition of storage, the received screen information is Concealment processing means for concealment processing according to the position information of the data unit;
Screen information storing means for storing screen information concealed in data units by the concealment processing means;
9. The client device of the server-based computing system according to claim 8, further comprising: The storage permission / inhibition correspondence processing means includes:
10. The client device of the server-based computing system according to claim 8, further comprising an external transfer storage control unit that transfers and stores screen information to be stored to an external device. A server control program for controlling a computer of a server device of a server-based computing system,
The computer,
Management information storage means for storing, in a memory, management information in which whether or not the screen information transmitted to the client device can be stored in the client device is set,
Confirmation request receiving means for receiving a confirmation request for whether or not to save the transmitted screen information from the client device;
A storage propriety judging means for judging whether or not to save based on the management information stored in the memory by the management information storage means when a confirmation request for the saving possibility is received by the confirmation request receiving means;
A determination result transmitting means for transmitting to the client device a determination result of whether or not to store the transmitted screen information determined by the storage permission determination means;
Server control program for server-based computing system that functions as a server. A client control program for controlling a computer of a client device of a server-based computing system,
The computer,
Screen information receiving means for receiving screen information generated by the server device;
Confirmation request transmitting means for transmitting a confirmation request for whether or not to save the screen information received by the screen information receiving means to the server device;
A determination result receiving means for receiving a determination result of whether or not storage is possible sent from the server device in response to the confirmation request for whether or not storage is possible sent by the confirmation request transmitting means;
Based on the determination result of the storage availability received by the determination result receiving means, the storage availability corresponding processing means for performing the process of saving or non-saving on the screen information received from the server device,
Server-based computing system client control program that functions as a server.

Images