JP5857461B2 - Client server system provided with web application, and client device in the client server system - Google Patents

Description

  The present invention relates to a client server system including a client having a web browser and a web server having a web application operating on the web browser, and a client device in the client server system.

  A web application is an application that performs actual work on a web server in response to various requests from a web browser connected via a network. Web applications have been rapidly spreading in recent years due to advantages such as easy version upgrades and availability without depending on client-side environments.

  Conventionally, in order to print a document on a web application from a client terminal, it is necessary to install print setting software such as a printer driver in the client terminal. Therefore, when printing from a printer that is used for the first time, it was necessary to find a corresponding printer driver and install it on the client terminal, and if the printer driver is not compatible with the OS of the client terminal, printing is performed. There was a problem that it could not be executed.

  In order to cope with the above problem, a system has been proposed in which a print file can be transmitted from a web browser to a server (print server, web server, etc.) and output to a printer can be executed via the server ( Patent Document 1). According to this system, the image data for preview is generated on the web server side in accordance with the print settings on the web browser, so that the user can make print settings while checking the preview on the web browser. On the other hand, according to the same system, if the print settings are changed on the web browser, it is necessary to convert the print file to raster format image data again on the web server side and download it to the client side. It has been pointed out that the performance of the system is degraded.

JP 2010-225176 A

  The present invention has been made in order to solve the problems associated with the above-described conventional technology, and an object of the present invention is to repeatedly execute image conversion processing of a print file on the server device side at the time of print setting by a web application. It is an object of the present invention to provide a client server system that can effectively prevent the performance degradation of the entire system and a client device in the system.

  The above object of the present invention is achieved by the following means.

(1) A client server system including a client device provided with a web browser and a server device provided with a web application operating on the web browser, wherein the client device prints a file to be printed on the web application. A setting unit that accepts a setting change instruction, and raster format image data representing the file before the change instruction is reflected, and edits the pre-change image data acquired from the server device without conversion. The determination unit that determines whether it is possible to generate post-change image data that is raster format image data representing the file after the change instruction is reflected, and the determination unit can generate If it is determined, the image data before change is changed to the change data. Anda editing unit for generating image data after the change by editing according to the instructions, the server apparatus, if it is determined that the determination unit is not capable of generating, the file to be rasterized in accordance with the change instruction The conversion unit that generates the changed image data according to the above, and the client device further includes a display unit that displays a preview of the file after the change instruction is reflected based on the changed image data. A featured client-server system.

(2) The determination unit, and setting items can be changed by the change instruction, referring to the table associating the said editing unit and the conversion unit, if the setting item is associated with the editing unit, wherein The client server according to (1) , wherein an editing unit edits the pre-change image data, and the conversion unit rasterizes the file when the setting item is associated with the conversion unit. system.

( 3 ) The editing unit executes at least one of enlargement or reduction of the pre-change image data, rearrangement of the pre-change image data, and superimposition of other image data on the pre-change image data. The client-server system according to (1) or (2) , wherein the changed image data is generated by:

( 4 ) The client-server system according to ( 3 ), wherein each of the other image data represents a finishing processing function of a printing apparatus that prints the file.

( 5 ) The client server system according to ( 4 ), wherein the finishing function includes a punch function or a staple function.

( 6 ) The display unit displays information about the print error instead of the post-change image data or in addition to the post-change image data when a print error occurs due to the change instruction. The client server system according to any one of (1) to ( 5 ) above.

( 7 ) A client device that executes a web application on a web browser, the setting unit receiving a print setting change instruction for a file printed on the web application, and the file before the change instruction is reflected A change in raster format image data representing the file after the change instruction is reflected by editing the image data before change obtained from the outside without converting the image data in raster format representing the file A determination unit that determines whether or not post-image data can be generated, and the post-change image by editing the pre-change image data according to the change instruction when the determination unit determines that the post-change image data can be generated. It has an editing unit for generating data, and determines that the evaluation unit is not capable of generating If, provided the file to an external conversion unit for generating image data after the change by rasterizing in accordance with the change instruction, a preview of the file after the change instruction based on the after-image data is reflected A client device further including a display unit for displaying.

(8) the evaluation unit includes a setting item can be changed by the change instruction, referring to the table associating the said editing unit and the conversion unit, if the setting item is associated with the editing unit, wherein The client device according to (7) , wherein an editing unit edits the pre-change image data, and if the setting item is associated with the conversion unit, the conversion unit rasterizes the file. .

( 9 ) The editing unit executes at least one of enlargement or reduction of the pre-change image data, rearrangement of the pre-change image data, and superimposition of other image data on the pre-change image data. The client device according to any one of the above (7) and (8) , wherein the changed image data is generated by:

( 10 ) The client apparatus according to ( 9 ), wherein each of the other image data represents a finishing processing function of a printing apparatus that prints the file.

( 11 ) The client device according to ( 10 ), wherein the finishing function includes a punch function or a staple function.

( 12 ) The display unit displays information on the print error instead of the post-change image data or in addition to the post-change image data when a print error occurs due to the change instruction. The client device according to any one of ( 7 ) to ( 11 ) above.

  The client device in the client server system according to the present invention has an image before the change instruction is reflected in order to generate image data (changed image data) after the change instruction at the time of print setting by the web application is reflected. Means for editing data (image data before change) are provided.

  Therefore, according to the present invention, the changed image data can be generated on the client device side even when a change instruction is accepted at the time of print setting by the web application, so the image conversion processing is repeatedly executed on the server device side. As a result, it is possible to effectively prevent a decrease in the performance of the entire system that may occur at the time of print setting by a web application.

It is a block diagram which shows the structure of the client server system which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the client apparatus (PC) which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the server apparatus (server) which concerns on one Embodiment of this invention. It is a functional block diagram of the web application which concerns on one Embodiment of this invention. It is a functional block diagram of a print setting program according to an embodiment of the present invention. It is the schematic which shows the data flow between PC and the server which concerns on one Embodiment of this invention. It is the schematic which shows the production | generation process module table which concerns on one Embodiment of this invention. It is a flowchart which shows the procedure of the program starting process which concerns on one Embodiment of this invention. It is a flowchart which shows the procedure of the preview display process which concerns on one Embodiment of this invention. It is the schematic which shows an example of the preview of the document file which concerns on one Embodiment of this invention. It is the schematic which shows an example of the preview of the document file which concerns on one Embodiment of this invention.

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

  FIG. 1 is a block diagram showing a configuration of a client server system (hereinafter referred to as “CS system”) according to an embodiment of the present invention. As shown in FIG. 1, the CS system according to the present embodiment includes a PC 1 as a client device, a server 2 as a server device, and a printer 3 as a printing device.

  Here, a web browser B is installed in the PC 1 according to the present embodiment, and a web application A that operates on the web browser B is installed in the server 2. The user of the PC 1 can use the web application via the web browser B.

  As shown in FIG. 1, the PC 1, the server 2, and the printer 3 are connected to each other via a network N so that they can communicate with each other. Here, the network N is a LAN based on Ethernet (registered trademark), token ring, FDDI or the like, or a WAN or the Internet in which LANs are connected by a dedicated line. The type and number of devices connected to the network N are not limited to the example in the figure. Note that communication between the PC 1 and the server 2 when executing the web application A is performed by HTTP.

  Next, the configuration of each device will be described. However, since the printer 3 is a general printer such as a laser printer or an inkjet printer, a detailed description thereof will be omitted. FIG. 2 is a block diagram illustrating a configuration of the PC 1 according to the present embodiment. As illustrated in FIG. 2, the PC 1 includes a control unit 11, a storage unit 12, a display unit 13, an input unit 14, and a network interface 15, which are connected to each other via a bus 16 so as to be able to communicate with each other. These components will be described in order below.

  The control unit 11 is a central control unit (CPU), and controls the operation of each unit according to a program and executes various arithmetic processes. The storage unit 12 includes a ROM that stores programs and parameters for controlling basic operations of the PC 1, a RAM that temporarily holds various data as a work area for the CPU, and an HDD that stores various programs and data files. It is a storage area. The storage unit 12 includes an image data storage database 12a for storing image data for preview display by preview display means D5 (described later).

  The display unit 13 is a display device such as an LCD for displaying various types of information to the user. In particular, the display unit 13 displays various UI (user interface) screens by the web browser B. The input unit 14 is an input device such as a keyboard and a mouse for acquiring various operation instructions from the user. The network interface 15 is a communication device such as a NIC for connecting the PC 1 to the network N.

  Next, FIG. 3 is a block diagram illustrating a configuration of the server 2 according to the present embodiment. As shown in FIG. 3, the server 2 includes a control unit 21, a storage unit 22, a network interface 23, and the like, and these are connected via a bus 24 so that bidirectional communication is possible. These components will be described in order below.

  The control unit 21 is a central control unit (CPU), and controls the operation of each unit according to a program and executes various arithmetic processes. The storage unit 22 includes a ROM that stores programs and parameters for controlling the basic operation of the server 2, a RAM that temporarily holds various data as a work area of the CPU, an HDD that stores various programs and data files, and the like. Storage area. The storage unit 22 includes a document file storage DB 22a for storing a document file for printing. The storage unit 22 stores a print setting program D (described later) for downloading to the PC 1. The communication interface 23 is a communication device such as a NIC for connecting the server 2 to the network N.

  Next, the web application A installed in the server 2 will be described. FIG. 4 is a functional block diagram of the web application A according to the present embodiment. As shown in FIG. 4, the web application A includes an image conversion unit A1, an output device information management unit A2, and a job generator in addition to various modules that execute various processes in response to a user request made via the browser B. Means A3 is provided. These functions will be described in detail with reference to FIG. FIG. 6 is a schematic diagram showing a data flow between the web application A and the print setting program D.

  The image conversion means A1 generates image data for preview by image conversion (rasterization) of the document file in the document file storage DB 22a. As shown in FIG. 6, the image data generated by the image conversion means A 1 is transferred to the PC 1 via the network N and stored in the image data storage DB 12 a in the storage unit 12. In FIG. 6, the image data generated by the image conversion means A1 is referred to as “before-change image data” or “after-change image data” for convenience. This point will be further described later.

  10 and 11 are schematic views showing an example of a preview based on the image data generated by the image conversion means A1. The image conversion means A1 can generate image data that directly shows the print result of the document file as shown in FIG. 10, or shows only the attribute information (file name, paper size, etc.) of the document file as shown in FIG. A summary page can also be generated. In addition, the image conversion means A1 can generate vector format image data by vector-converting the document file.

  The output device information management means A2 periodically communicates with a printing apparatus (such as the printer 3) on the network N to acquire information (hereinafter referred to as “device information”) regarding the printing function and finishing processing function of each apparatus. . The device information according to the present embodiment includes information related to the printing area, staple position, punch position, and the like of each apparatus. As shown in FIG. 6, the device information acquired by the output device information management unit A2 is transferred to the print setting unit D3 when setting the print of the document file. This point will be further described later.

  The job generation unit A3 converts the document file in the document file storage DB 22a into print data (print job) in a format that can be processed by the printing apparatus. As shown in FIG. 6, the print job generated by the job generation unit A3 is transferred to a printing apparatus such as the printer 3 for print processing.

  Next, the print setting program P stored in the storage unit 22 of the server 2 will be described. The print setting program P according to the present embodiment is a rich Internet application (hereinafter referred to as “RIA”) using JavaScript (registered trademark), Microsoft Silverlight (registered trademark), Adobe Flash (registered trademark), or the like. Are downloaded from the server 2 to the PC 1 and executed on the web browser of the PC 1.

  FIG. 5 is a functional block diagram of the print setting program D. As shown in FIG. 5, the print setting program D includes file reading means D1, output device selection means D2, print setting means D3, setting management means D4, preview display means D5, and image editing means D6. These components will be described with reference to FIG. Note that the print setting program D may further include image conversion means D7 (not shown) that generates image data for preview by image conversion (rasterization) of a document file in the same manner as the image conversion means A1 described above.

  The file reading means D1 receives a print document file selection result from the user via the web browser B. More specifically, the file reading means D1 displays a UI screen (not shown) for selecting a document file on the web browser B, and allows the user to select a document file for printing on the UI screen. As shown in FIG. 6, the document file selected by the user is transferred to the web server 2 via the network N and stored in the document data storage DB 22a.

  The output device selection unit D2 receives the selection result of the printing apparatus that prints the document file from the user via the web browser B. More specifically, the output device selection unit D2 displays a UI screen (not shown) for selecting an output device on the web browser B, and allows the user to select a printing apparatus that prints a document file on the UI screen. As shown in FIG. 6, the selection result of the printing apparatus by the user is transferred to the print setting unit D3.

  The print setting unit D3 receives an instruction to change the print setting of the document file from the user via the web browser B. More specifically, the print setting means D3 displays a print setting UI screen (not shown) on the web browser B, and allows the user to input an instruction to change the print setting of the document file on the UI screen. As shown in FIG. 6, the change instruction received by the print setting unit D3 is transferred to the setting management unit D4.

  Note that the print setting unit D3 can display the UI screen customized according to the device information by referring to the device information of the printing apparatus selected by the user. The “customized print setting UI screen” here is a UI grayed out so that buttons and check boxes related to functions not installed in the printing apparatus (double-sided printing, stapling, punching, etc.) are not selected. Refers to the screen.

  Based on the change instruction transferred from the print setting unit D3, the setting management unit D4 determines whether the image editing unit D6 or the image conversion unit A1 should generate image data after the change instruction is reflected. In the following, the image data after the change instruction is reflected is referred to as “image data after change”, and the image data before the change instruction is reflected is “changed” for comparison with “image data after change”. It will be referred to as “previous image data”.

  More specifically, the setting management unit D4 refers to the generation processing module table T illustrated in FIG. 7, and the setting item to be changed by the change instruction is “image editing unit” or “image conversion unit”. Determine whether they are associated. Assume that the processing module table T as shown in FIG. 7 is stored in advance in the storage unit 12 of the PC 1.

  In the example of FIG. 7, the individual setting items are “image editing means” and “image” depending on whether or not post-change image data can be generated only by editing the pre-change image data in the image data storage DB 12 a. It is associated with one of the “conversion means”. That is, when the setting item to be changed is “page allocation”, “single-sided / double-sided printing” or the like, it is possible to generate post-change image data only by editing the pre-change image data in the image data storage DB 12a. These setting items are associated with “image editing means”.

  On the other hand, if the setting item to be changed is “color setting (color correction)” or “watermark”, the changed image data cannot be generated unless the original document file is converted again. The setting item is associated with “image converting means”. However, the correspondence relationship between the “setting item” and the “generation processing module” defined by the generation processing module table T according to the present embodiment is not limited to the example illustrated in FIG.

  The preview display means D5 displays a preview of the document file on the web browser B based on the image data in the image data storage DB 12a. The preview display means D5 displays a preview based on the pre-change image data until a change instruction is accepted by the print setting means D3, but changes after the print setting change instruction is accepted and the changed image data is generated. Display a preview based on the post-image data. 10 and 11 are schematic views showing an example of a preview displayed by the preview display means D5.

  The image editing unit D6 generates post-change image data by editing the pre-change image data in the image data storage DB 12a in accordance with the change instruction transferred from the setting management unit D4. More specifically, the image editing unit D6 does not re-rasterize the document file, but enlarges / reduces the pre-change image data, rearranges the pre-change image data, or adds other data to the pre-change image data. The post-change image data is generated by superimposing the image data. The other image data here refers to image parts representing various finishing processing functions (punch function, stapling function, etc.) mounted on the printing apparatus selected by the user, and this is a storage unit of the PC 1. 12 or the like.

  Next, an outline of the operation of the CS system according to the present embodiment will be described. FIG. 8 is a flowchart showing a procedure of processing (hereinafter referred to as “program start processing”) for starting the print setting program D and displaying the print setting UI screen by the PC 1 according to the present embodiment. This process is executed when a print setting start instruction is received. Note that the algorithm shown in the flowchart of FIG. 8 is stored as a control program in the ROM in the recording unit 12, and is read into the RAM and executed when the operation starts.

  First, the PC 1 connects to the server 2 via the network N by accessing the URL of the server 2 from the web browser B (S101). Then, the PC 1 determines whether or not the print setting program D stored in the recording unit 22 of the server 2 has been downloaded (S102).

  If the print setting program D has been downloaded (YES in S102), the print setting program D in the storage unit 12 is activated (S104). If the print setting program D has not been downloaded (NO in S102). ) After downloading the print setting program D stored in the server 2 to the storage unit 12 (S103), the print setting program D is activated (S104). Note that the steps S101 to S104 may be executed when the web application A is started by the web browser B, instead of being executed when the print setting is performed on the web application A as described above.

  Subsequently, the PC 1 receives the selection result of the printing apparatus that prints the document file by the output device selection unit D2 (S105). Then, the PC 1 acquires device information of the selected printing apparatus from the output device information management unit A2 of the server 2 (S106). Thereafter, the PC 1 generates a print setting UI screen customized according to the device information acquired in S106 by the print setting unit D3, displays it on the web browser B (S107), and ends the series of processing. (End)

  FIG. 9 is a flowchart showing a procedure of processing (hereinafter referred to as “preview display processing”) for displaying a preview of a document file for printing by the PC 1 according to the present embodiment. The algorithm shown in the flowchart of FIG. 9 is stored as a control program in the ROM in the storage unit 12, and is read into the RAM and executed when the operation starts.

  First, the PC 1 receives a document file selection result by the file reading means D1 (S201), and uploads the document file to the document file storage DB 22a of the server 2 via the network N (S202). The document file uploaded to the document file storage DB 22a is converted into raster format image data by the image conversion means A1. Thereby, pre-change image data is generated.

  Subsequently, the PC 1 downloads the pre-change image data generated by the image conversion means A1 via the network N, and stores it in the image data storage DB 12a (S203). Then, the preview display means D5 displays a preview of the document file based on the pre-change image data in the image data storage DB 12a (S204).

  Subsequently, the PC 1 receives a print setting change instruction from the print setting unit D3 (S205). If no change instruction has been accepted (NO in S205), the series of processing ends (end). On the other hand, when a change instruction is accepted (YES in S205), the generation processing module table T in the storage unit 12 is referred to (S206), and it is determined whether or not post-change image data should be generated by the image editing unit D6. (S207). That is, it is determined whether or not the setting item changed by the change instruction is associated with the “image editing unit” in the generation processing module table T.

  If the image editing unit D6 determines that the post-change image data should be generated (YES in S207), the image editing unit D6 edits the pre-change image data in the image data storage DB 12a to edit the post-change image. Data is generated (S208). For example, when the setting item changed by the change instruction is “page allocation”, “single side / double side”, etc., the post-change image data is changed by executing enlargement / reduction and rearrangement of the pre-change image data. Generate.

  When the setting item changed by the change instruction is “staple”, “punch”, or the like, post-change image data is generated by superimposing image parts corresponding to these functions on the pre-change image data. At this time, if the device information acquired in S106 of FIG. 8 includes information on the staple position (“upper left”, “upper right”, etc.), it is preferable to superimpose the image parts in accordance with the staple position. .

  The post-change image data generated in S208 is stored in the image data storage DB 12a. Since the change instruction by the user may be repeated thereafter, the pre-change image data is preferably held in the image data storage DB 12a together with the post-change image data.

  On the other hand, when it is determined by the image editing unit D6 that the post-change image data should not be generated (NO in S207), that is, the setting item to be changed is associated with the “image conversion unit” in the generation processing module table T. If so, the change instruction is transferred to the image conversion means A1 of the server 2 via the network N (S209). The image conversion means A1 that has received the change instruction generates image data after change by image-converting the document file in the document file storage folder 22a again.

  However, when the image conversion unit D7 is provided on the print setting program D side (that is, the PC1 side) as described above, it is preferable to generate the changed image data by the image conversion unit D7 on the PC1 side. Thereby, it is possible to prevent the performance of the entire system from being deteriorated due to the transfer processing of image data from the server 2 to the PC 1.

  Thereafter, the PC 1 downloads the changed image data generated by the image conversion means A1 (S210), and stores it in the image data storage DB 12a. The PC 1 displays a preview based on the changed image data in the image data storage DB 12a (S211), and ends the series of processes (END). That is, in S211, a preview of the document file reflecting the change instruction is displayed based on the post-change image data generated by either the image editing unit D6 or the image conversion unit A1.

  When a print error occurs on the printing apparatus side due to the changed print settings, the preview display unit D5 displays information (error message) about the print error instead of the changed image data or in addition to the changed image data. Etc.) can be displayed. For example, if the stapling function is specified in the changed print settings, but the same function is not installed in the printing device, the preview display means D5 indicates that “staple processing cannot be executed. Error message can be displayed.

  As described above, the PC 1 in the CS system according to the present embodiment reflects the change instruction to generate image data (post-change image data) after the change instruction at the time of print setting by the web application A is reflected. Image editing means D6 for editing image data before being changed (image data before change) is provided.

  Therefore, according to the present embodiment, even if a change instruction is accepted at the time of print setting by the web application A, the post-change image data can be generated on the PC 1 side, and therefore image conversion processing (rasterization) is performed on the server 2 side. ) Need not be repeatedly executed, and as a result, it is possible to effectively prevent a decrease in the performance of the entire system that may occur at the time of print setting by the web application A.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, the client device according to the present invention may be any device that can execute a program downloaded on a web browser, and may be a smartphone, a tablet terminal, or the like. The server device according to the present invention may be a general PC or a computer built in a printing device or the like on a network. The printing apparatus according to the present invention may be an MFP having a scan function, a copy function, and the like in addition to a print function.

  The client device according to the present invention can be realized by a dedicated hardware circuit for executing the above procedure or by a program describing the above procedure. When the present invention is realized by the latter, a program for operating the client device may be provided by a computer-readable recording medium such as a floppy (registered trademark) disk or CD-ROM, or via a network such as the Internet. It may be provided online. Here, the program recorded on the computer-readable recording medium is usually transferred to a ROM, a hard disk or the like built in the recording device. Further, the program may be provided as a single application software, or may be incorporated into the software as one function of the client device.

1 PC,
11 Control unit,
12 storage unit,
12a DB for storing image data,
13 Display section,
14 input section,
15 network interface,
2 servers,
21 control unit,
22 storage unit,
22a Document file storage DB,
23 Network interface,
3 Printer,
A web application,
A1 image conversion means,
A2 output device information management means,
A3 job generation means,
B Web browser
D print setting program,
D1 file reading means,
D2 output device selection means,
D3 print setting means,
D4 setting management means,
D5 preview display means,
D6 image editing means,
T Generation processing module table.

Claims (12)

A client server system including a client device provided with a web browser and a server device provided with a web application operating on the web browser,
The client device,
A setting unit that receives an instruction to change print settings of a file to be printed on the web application;
Raster image data representing the file before the change instruction is reflected, and after the change instruction is reflected by editing the image data before change acquired from the server device without conversion. A determination unit that determines whether it is possible to generate post-change image data that is image data in a raster format that represents the file;
An editing unit that generates the post-change image data by editing the pre-change image data according to the change instruction when it is determined that the determination unit can generate ,
The server device includes a conversion unit that generates the changed image data by rasterizing the file according to the change instruction when the determination unit determines that the file cannot be generated,
The client apparatus further includes a display unit that displays a preview of the file after the change instruction is reflected based on the changed image data. The determination unit, and setting items can be changed by the change instruction, referring to the table associating the said editing unit and the conversion unit, if the setting item is associated with the editing unit, the editing unit client-server system according to claim 1 is editing the before-image data, when the setting item is associated with the conversion unit, characterized in that to rasterize the file to the conversion unit. The editing unit performs the change by executing at least one of enlargement or reduction of the pre-change image data, rearrangement of the pre-change image data, and superimposition of other image data on the pre-change image data. 3. The client server system according to claim 1, wherein post-image data is generated. 4. The client server system according to claim 3 , wherein each of the other image data represents a finishing processing function of a printing apparatus that prints the file. The client server system according to claim 4 , wherein the finishing processing function includes a punch function or a staple function. The display unit displays information related to the print error instead of the post-change image data or in addition to the post-change image data when a print error occurs due to the change instruction. 1. The client server system according to any one of 1 to 5 . A client device that executes a web application on a web browser,
A setting unit that receives an instruction to change print settings of a file to be printed on the web application;
Raster-format image data representing the file before the change instruction is reflected, and editing the pre-change image data acquired from the outside without conversion , whereby the change instruction is reflected A determination unit that determines whether or not post-change image data that is raster format image data representing a file can be generated;
An editing unit that generates the post-change image data by editing the pre-change image data according to the change instruction when it is determined that the determination unit can generate ,
When the determination unit determines that it cannot be generated, a conversion unit that generates the changed image data by rasterizing the file according to the change instruction is provided outside,
A client device further comprising a display unit for displaying a preview of the file after the change instruction is reflected based on the changed image data. The determination unit, and setting items can be changed by the change instruction, referring to the table associating the said editing unit and the conversion unit, if the setting item is associated with the editing unit, the editing unit The client device according to claim 7 , wherein the pre-change image data is edited, and if the setting item is associated with the conversion unit, the conversion unit rasterizes the file. The editing unit performs the change by executing at least one of enlargement or reduction of the pre-change image data, rearrangement of the pre-change image data, and superimposition of other image data on the pre-change image data. 9. The client apparatus according to claim 7, wherein the post-image data is generated. The client apparatus according to claim 9 , wherein each of the other image data represents a finishing processing function of a printing apparatus that prints the file. The client apparatus according to claim 10 , wherein the finishing processing function includes a punch function or a staple function. The display unit displays information related to the print error instead of the post-change image data or in addition to the post-change image data when a print error occurs due to the change instruction. The client device according to any one of 7 to 11 .