JP2013059931A - Data processing device, server, and data processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute proper operation in resuming interrupted post-processing.SOLUTION: A data processing device includes: a requesting section that issues a request to transmit processing data to a server; a receiving section that receives the processing data transmitted from the server in response to the request; and a processing section that sequentially acquires the received processing data and executes processing by using the processing data. When the processing section acquires the processing data again after interrupting the acquisition of the processing data before completing the acquisition of the processing data, the requesting section requests the transmission of data of the entire processing data which have not been acquired by the processing section when the reason for interrupting the acquisition of the processing data is classified into a first group, and requests transmission of the entire processing data when the reason for interrupting the acquisition of the processing data is classified into a second group.

Description

  The present invention relates to a data processing device, a server, and a data processing method, and to a technology for executing processing in response to a request acquired from a user via a server in a cloud computing system.

  2. Description of the Related Art Conventionally, a cloud computing system that provides a service that allows a specific printer to execute printing by sending an e-mail is known (for example, Patent Document 1). This cloud computing system (hereinafter simply referred to as a printing system) includes a server that generates print data corresponding to a specific printer based on an e-mail when a specific e-mail is received, and a specific registered in the server The printer acquires print data from the server and executes printing. Therefore, the user of the printing system can use the printer registered in the printing system even when the printer driver is not installed in a client terminal such as a PC (Personal Computer) or a smartphone.

JP 2008-71257 A

  In such a printing system, the server generates print data based on the email sent by the user, notifies the printer of the existence of the print job, and the printer that received the notification sends the print data to the server. Printing is performed while acquiring print data by making a transmission request. Since the memory size installed in the printer is limited from the viewpoint of cost, the print data of the portion where printing has been completed is discarded from the memory, and a memory area is secured for print data to be processed next. Since the printer performs printing while acquiring print data in this way, if an error occurs in the printer during print data acquisition, printing cannot be continued and printing data cannot be discarded from memory. Eventually, the print data transmitted subsequently cannot be received.

In such a case, conventionally, since an error has occurred, the operation is to end printing, and the operation after error recovery after being interrupted by an error has not been particularly considered.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique for performing an appropriate operation when the processing is resumed after the processing is interrupted.

  A data processing apparatus for achieving the above object includes a requesting unit, a receiving unit, and a processing unit. The request unit makes a transmission request for processing data to the server. The receiving unit receives the processing data transmitted from the server in response to the transmission request. The processing unit sequentially acquires the received processing data and performs processing using the processing data. The request unit makes a transmission request as follows when the acquisition of the processing data is resumed after the acquisition of the processing data is interrupted before the processing unit completes the acquisition of the processing data. That is, when the reason for interrupting the acquisition of processing data is classified into the first group, the requesting unit makes a transmission request for a portion of the entire data that has not been acquired by the processing unit, and interrupts the acquisition of processing data If the reason is classified into the second group, a transmission request is made for the entire data.

  Here, the following events are assumed as the reason for classification into the first group. That is, it is an occurrence of an event that it is desirable to resume the interrupted process from the continuation after the event that causes the interruption is resolved. The following events are assumed to be classified as the second group. That is, it is an occurrence of an event that it is desirable to process the interrupted process again from the beginning after the event that causes the interruption is resolved. The group into which the reason for interruption (becoming event) is classified is predetermined in the data processing apparatus.

  Therefore, according to the configuration of the present invention, when the acquisition of the processing data is resumed, it is possible to switch between acquiring the entire data again or acquiring only the unacquired portion depending on the reason for the interruption. As a result, if an event occurs that it is desirable to resume processing from the point of continuation, the processing unit can acquire unacquired processing data. Compared with a configuration in which the whole is acquired again, the time required for processing can be shortened. In addition, when an event occurs that it is desirable to start processing again from the beginning when restarting after interruption, the entire processing data can be reacquired, so that the entire processing data is again targeted. Can be processed.

Further, in the data processing apparatus for achieving the above object, the request unit may perform a transmission request for a portion of the processing data that has not been acquired by the processing unit by specifying a range using an HTTP range header. Good.
By using the HTTP range header, a partial transmission request for processing data can be realized.

Furthermore, in the data processing apparatus for achieving the above object, the processing data may be print data, and the processing unit may be a processing unit that performs printing based on the acquired print data. In that case, the reason for being classified into the first group includes the occurrence of an error of at least one of no print medium, no color material, print medium type mismatch, and device cover open. The reason for the classification may include occurrence of an error of at least one of a print medium jam, a mechanical abnormality of the processing unit, and a power failure.
When the error is resolved after various errors as described above, depending on the group into which the error is classified, the entire print data transmission request is made, or the print data partial transmission request is made. Can be switched.

  Moreover, the server for achieving the said objective is provided with a memory | storage part and a transmission part. The storage unit stores processing data to be processed by the data processing device. The transmission unit transmits the processing data to the data processing device. When the transmission unit suspends the transmission of the processing data before completing the transmission of the entire processing data, and then retransmits the processing data, the transmission unit determines that the reason for interrupting the transmission of the processing data is the first group If the transmission data is classified into the second group, the reason why the transmission of the processing data is interrupted is transmitted to a part of the processing data including the part where the transmission unit has not been transmitted. If so, the entire processing data is transmitted.

  By adopting the configuration as described above, the server can switch the range of the processing data to be transmitted to the data processing device after the transmission is resumed, depending on the reason for interrupting the transmission of the processing data. That is, it is possible to switch between transmission of a part of print data including an untransmitted portion or transmission of the entire print data. The data processing apparatus can perform processing using the processing data transmitted from the server.

  Note that the function of each means described in the claims is realized by hardware resources whose function is specified by the configuration itself, hardware resources whose function is specified by a program, or a combination thereof. The functions of these means are not limited to those realized by hardware resources that are physically independent of each other. Further, the server is not limited to one configured from a single computer device, but includes a configuration in which a plurality of computer devices cooperate to operate as the above-described server. Furthermore, the present invention can be realized as a method, a computer program, and a recording medium for the program. Of course, the recording medium for the computer program may be a magnetic recording medium, a magneto-optical recording medium, or any recording medium developed in the future.

1 is a block diagram of a data processing apparatus according to a first embodiment. The schematic diagram which shows the structural example of the buffer concerning 1st embodiment. The figure which shows the classification | category of the error concerning 1st embodiment. The sequence chart of the printing sequence concerning a first embodiment. FIG. 3 is a schematic diagram illustrating the state of each part of print data according to the first embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the corresponding component in each figure, and the overlapping description is abbreviate | omitted.
1. 1. First embodiment 1-1. Configuration FIG. 1 is a block diagram showing the overall configuration of a printing system including a printer (data processing apparatus, printing apparatus) 3 and a server 2 in this embodiment. In the printing system illustrated in FIG. 1, when an e-mail addressed to an e-mail address associated with the printer 3 registered in the server 2 is transmitted from any communication terminal 1, the e-mail address is associated with the e-mail address of the destination. The printer 3 realizes a function of printing an e-mail attachment file or body text. The server 2, printer 3, and communication terminal 1 are connected to the Internet 4.

  The server 2 includes one or more computers, and includes an application server 21, an SMTP server 22, an HTTP server 23, and an XMPP server 24. Each of the application server 21, the SMTP server 22, the HTTP server 23, and the XMPP server 24 includes a CPU, a RAM, a ROM, a hard disk device, a communication unit, and an internal interface that connects them (not shown). The communication unit converts a signal received from the Internet via the LAN according to the protocol and transmits the converted signal to the internal bus, converts a signal received from the internal bus according to the protocol and transmits the converted signal to the Internet via the LAN.

  The SMTP server 22 has a function of transmitting and receiving an e-mail addressed to an e-mail address assigned to the printer 3 registered in the application server 21 based on SMTP (Simple Mail Transfer Protocol). The HTTP server 23 has a function of communicating with the printer 3 based on HTTP (Hyper Text Transfer Protocol), and functions as a “transmission unit” that transmits print data to the printer 3. The XMPP server 24 has a function of communicating with the printer 3 based on XMPP (Extensible Messaging and Presence Protocol), and transmits a print job presence notification to the printer 3. When the application server 21 receives the e-mail based on the SMTP, the application server 21 generates print data corresponding to the corresponding printer 3 based on the e-mail and stores the print data in the memory in the server 2 (corresponding to a “storage unit”). And a function of transmitting a print job notification to the corresponding printer 3 based on XMPP and transmitting the generated print data to the printer 3 in response to a transmission request based on HTTP from the printer 3.

  The printer 3 has a function of receiving print data from the server 2 using HTTP and executing printing when the server 2 is notified of the presence of a print job through a constant connection with the server 2 using XMPP. Accordingly, the printer 3 includes a communication unit 34 for transmitting and receiving various data via the Internet 4 in addition to the components of a normal printer such as a controller 31 having a CPU, ROM, RAM, and the like, and a printing unit 35. ing. The communication unit 34 converts the signal received from the Internet 4 via the LAN according to the protocol and sends it to the internal bus, and converts the signal received from the internal bus according to the protocol and sends it to the Internet via the LAN. The ROM of the controller 31 stores various computer programs such as a communication program and a printing program that are read into the RAM and executed by the CPU. Various functions of the printer 3 are realized by the CPU executing these computer programs.

  The communication program is a program for performing communication with the server 2 according to a communication protocol such as TCP / IP, HTTP, XMPP or the like. Note that the controller 31 has acquired in advance information necessary for connecting to the server 2 using HTTP or XMPP. The reception buffer 32 is a memory that stores data received from the outside by the controller 31 that executes the communication program via the communication unit 34, and is a memory that temporarily stores various data such as print data. The controller 31 and the communication unit 34 that execute the communication program correspond to a “request unit” that makes a print data transmission request to the server 2. The controller 31, the communication unit 34, and the reception buffer 32 that execute the communication program correspond to a “reception unit” that receives print data transmitted from the server 2.

  The print program reads the print data stored in the reception buffer 32, transfers it to the processing buffer 33, performs pre-print processing, converts the print data into data in a format suitable for printing in the printer 3, and converts the converted data. This is a program having a function of controlling the printing unit 35 based on data and performing printing. The controller 31 that executes the printing program, the printing unit 35, and the processing buffer 33 correspond to a “processing unit”. In the present embodiment, the server 2 renders a print target, generates print data, and transmits the print data to the printer 3. In the present embodiment, the pre-printing process refers to a resolution conversion process, a color conversion process, a halftone process, a rearrangement process, and the like performed on the print data received from the server 2. The processing buffer 33 stores pre-processing, processing steps, and post-processing data when the above-described pre-print processing is performed on the print data extracted and read out from various data stored in the reception buffer 32. It is a memory to do. The buffer memories respectively provided for data transfer of the above-described processes included in the pre-printing process are collectively referred to as a processing buffer 33.

  FIG. 2 is a schematic diagram for explaining each buffer. As shown in FIG. 2, for example, in this embodiment, the processing buffer 33 includes a first processing buffer 331 that stores print data read from the reception buffer 32 before resolution conversion processing, and data after resolution conversion that is color conversion processing. The second processing buffer 332 that stores the previous data, the third processing buffer 333 that stores the data after the color conversion processing and before the halftone processing, and the data after the halftone processing are arranged. A fourth processing buffer 334 that stores data before the rearrangement process and a fifth processing buffer 335 that stores data after the rearrangement process are included. The data stored in the fifth processing buffer 335 is used for printing by the printing unit 35. In the present embodiment, “the processing unit obtains the processing data” specifically refers to the controller 31 that executes the print processing program reads the print data stored in the reception buffer 32 from the reception buffer 32, and the processing buffer. 33 (first processing buffer 331). The print data read from the reception buffer 32 and transferred to the processing buffer 33 (first processing buffer 331) is discarded from the reception buffer 32 and applied to a storage location for new data to be received. Each time print data is transferred from the reception buffer 32 to the processing buffer 33, the print program has a measurement function that measures the accumulated data amount of the transferred print data as a size n.

  When the resolution conversion processing for the print data stored in the first processing buffer 331 is completed, the controller 31 writes the processed data to the second processing buffer 332 and discards the print data from the first processing buffer 331. To do. The subsequent print data is read from the reception buffer 32 and transferred to the first processing buffer 331. Similarly, for the second processing buffer 332 to the fifth processing buffer 335, the controller 31 reads and processes data from the preceding buffer, and when writing to the succeeding buffer ends, discards the data from the preceding buffer and continues to the subsequent buffer. The data can be transferred to the previous buffer. The printing unit 35 includes an actuator, a sensor, a drive circuit, and mechanical parts for executing printing on a printing medium such as a photographic paper, plain paper, or an OHP sheet by a known printing method such as an inkjet method or a laser method. The print data corresponding to the portion that has been printed by the printing unit 35 is discarded from the processing buffer 33 (fifth processing buffer 335).

  FIG. 3 is a diagram exemplifying a correspondence relationship between the error content identified in the printer 3, the error code, and a group into which each error is classified. The ROM of the controller 31 stores an error code and a group into which errors are classified in association with each other. “No print medium” is an error in which printing cannot be executed because a predetermined print medium is not set in the printer 3. “No color material” is an error in which printing cannot be performed because there is no color material (recording agent) used for printing such as ink or toner. The “print medium type mismatch” is, for example, that the type of print medium such as photographic paper or plain paper specified in the print job does not match the type of print medium set in the printer 3. It is an error. “Cover open” is an error in which printing cannot be performed because the movable cover that covers the casing in which the machine part that performs the printing operation such as the print head is accommodated is opened. The above error is an error that it is desirable to resume printing from the continuation of the interruption due to the error after the error is resolved. Therefore, the above errors are classified into a “first group” as a group of errors in which printing is resumed from the next.

  The “print medium jam” is an error in which printing cannot be executed because the print medium is jammed on the print medium conveyance path. The “mechanical abnormality” is an error in which printing cannot be executed because some mechanical abnormality has occurred in the printer 3. “Power failure” is an error in which printing cannot be executed because power is not supplied. These errors are errors that desirably execute the print job again from the beginning after the error is resolved. Therefore, these errors are classified into a “second group” as a group of errors for reprinting from the beginning.

1-2. Printing Sequence In the printing system shown in FIG. 1, when an e-mail addressed to an e-mail address associated with the printer 3 is transmitted from the communication terminal 1 together with the attached file, the attached file is immediately printed in the printer 3. It is hoped that In addition, it is not desirable from the viewpoint of the load on the server 2 and the network traffic that the printer 3 polls the server 2 using a message based on HTTP in order to immediately obtain a print request. Therefore, the printer 3 receives from the server 2 a print job presence notification based on XMPP. XMPP is a so-called push-type protocol that can send a message in both directions, so that polling of the server 2 by the printer 3 is not necessary. If no communication error or other error has occurred when the printer 3 is turned on, the server 2 and the printer 3 are in a state where the XMPP connection is always established.

  FIG. 4 is a sequence chart of the print sequence in the present embodiment. More specifically, the print data included in one print job is acquired by the printer 3 and transferred to the processing buffer 33 before being transferred to the processing buffer 33. It is a sequence chart when an error occurs. In the sequence chart of FIG. 4, in order to clarify the main part of the invention, the details of the session establishment and disconnection sequence, the description of the ACK packet and FIN packet responding to each communication, etc. are related to the invention. It is omitted except.

  First, when the server 2 receives an e-mail transmitted from the communication terminal 1 to an e-mail address associated with the printer 3 (S100), a print target such as an attached file is rendered and printed based on the e-mail. Data is generated, and the server 2 transmits a print job notification to the printer 3 using XMPP (S105). Upon receiving the print job presence notification transmitted from the server 2 by XMPP, the communication unit 34 establishes an HTTP session with the server 2 (S110), and transmits a content information transmission request to the server 2 with an HTTP get request (S115). ). The server 2 that has received the content information transmission request transmitted from the printer 3 transmits the content information of the print job to the printer 3 (S120). Here, the content information includes information relating to print data included in the print job, such as a print data download destination URI and a print data document format. The content information is stored in the reception buffer 32 via the communication unit 34. The controller 31 analyzes the data stored in the reception buffer 32 and acquires content information. After acquiring the content information, the controller 31 discards the content information from the reception buffer 32.

  Subsequently, the controller 31 transmits a print data transmission request to the server 2 using an HTTP get request (S125). The print data download destination URI is included in the content information acquired by the printer 3 in S120. In S125, a transmission request is made for the entire print data included in the print job notified in S105. The server 2 receives the print data transmission request from the printer 3, and transmits the print data to the printer 3 by a predetermined size from the top using HTTP (S130). The print data transmitted in S130 is transmitted to the printer 3 in a form included in the response message corresponding to the get request in S125. The HTTP header included in the response message includes information indicating the size (size M) of the entire print data transmitted to the printer 3 (Content-Length header).

  The print data transmitted from the server 2 is stored in the reception buffer 32 by the communication unit 34 and the controller 31 that executes the communication program. The size M of the entire print data is also stored in the reception buffer 32. The controller 31 analyzes the data in the reception buffer 32, acquires the size M, and stores it. The storage of the size M is erased by the controller 31 when the print data is printed. Subsequently, the controller 31 transfers the print data stored in the reception buffer 32 to the processing buffer 33 (first processing buffer 331) if there is a vacancy in the processing buffer 33 (first processing buffer 331). The amount of accumulated print data (size n) is measured. The print data that has been transferred to the processing buffer 33 is discarded from the reception buffer 32. The data amount (size n) is measured for each print job (the value of size n is reset when printing of one print job is completed). The controller 31 performs pre-printing processing on the print data transferred to the processing buffer 33. Then, the controller 31 controls the printing unit 35 based on the data subjected to the pre-printing process to execute printing. Data in the processing buffer 33 corresponding to the portion where printing has been completed is discarded.

  While the controller 31 is receiving print data, transferring print data from the reception buffer 32 to the processing buffer 33, measuring the amount of transferred data, pre-printing processing, and printing execution, an error occurs in the printer 3. The sequence in the case of occurrence of this will be described below. If an error occurs in the printer 3, the printer 31 cannot continue printing, and the controller 31 interrupts the printing operation. The controller 31 temporarily leaves the data in the processing buffer 33 without discarding it in preparation for resuming printing. Since no space is generated in the processing buffer 33, the controller 31 does not transfer the print data in the reception buffer 32 to the processing buffer 33. Therefore, the reception buffer 32 is filled with data including print data that has been received one after another from the server 2 and that has not yet been subjected to pre-print processing, and the subsequent print data cannot be received.

  In order to notify the server 2 of this state, the controller 31 sets the window size to “0” in the ACK packet corresponding to the transmission of the print data from the server 2 in S130 and transmits it to the server 2 (S135). This state is called a zero window state. When the server 2 determines that the zero window state continues for a predetermined period (for example, 5 minutes), the server 2 transmits data for disconnecting the HTTP session (S140). Specifically, for example, the server 2 transmits an RST (Reset) packet to the printer 3. As a result, the session between the printer 3 and the server 2 is disconnected. When the session is disconnected, the controller 31 discards the print data stored in the reception buffer 32.

  The time when the error is resolved and the printing can be resumed is undecided, and maintaining the HTTP session until this time places a load on the server 2. Specifically, the memory area reserved for each session cannot be released for a long time, and as a result, the time from receipt of an e-mail sent from another communication terminal to execution of printing is delayed. . In order to prevent this delay, the session between the server 2 and the printer 3 is once disconnected.

  When it is detected that the error in the printer 3 has been eliminated, the controller 31 establishes an HTTP session with the server 2 again (S145), and transmits a print data transmission request to the server 2 (S150). In S150, the content of the error that has occurred is determined, and the transmission request mode is switched according to the content of the error. Specifically, when an error is classified into the first group, a transmission request is made by specifying the range of continuation due to the error, and when the error is classified into the second group, the entire print data is Request transmission again.

  First, the case of an error in the first group (when a range is specified) will be described. When the controller 31 detects that the error has been resolved, the controller 31 resumes pre-printing processing and printing using the print data stored in the processing buffer 33. In addition, the controller 31 print data that has already been subjected to the pre-print processing based on the download destination URI of the print data at the time of the error and the value of the data amount (size n) transferred to the processing buffer 33. A transmission request is made by designating a range indicating the remaining print data portion excluding. Since the print data received from the server 2 and stored in the reception buffer 32 is discarded when the session is disconnected, the portion of the print data stored in the reception buffer 32 is also subject to reacquisition. Specifically, the controller 31 compares the size M and the size n of the entire print data, and if size M> size n> 0, the print data starts from the position following the data for size n from the top of the print data. A range of print data for (size M−size n) up to the end (position of size M) is specified. An HTTP range header is used for range specification.

  FIG. 5 is a schematic diagram illustrating print data included in one print job, and is a schematic diagram for explaining an example of a state of print data when an error occurs in the printer 3. In this example, the print data is divided into four parts from the head, and are called d1, d2, d3, and d4 in order from the head. The print data is transmitted from the server 2 in order from the top, stored in the reception buffer 32 in order, transferred to the processing buffer 33, subjected to pre-printing processing, printed, and discarded. When an error occurs, the print data d1 of a predetermined size from the top of the print data is already printed and discarded from the processing buffer 33, and the print data d2 subsequent to the print data d1 is stored in the processing buffer 33. Data that has been transferred and is undergoing pre-printing processing and data that is being printed. The print data d3 subsequent to the print data d2 is stored in the reception buffer 32 but not yet transferred to the processing buffer 33. Suppose there is. It is assumed that the print data d4 subsequent to the print data d3 is data that has not been received by the printer 3 yet. If an error occurs at the time of this state, the controller 31 sets the print data d3 and print data d4 in the range specified in the print data transmission request in S150.

  When the server 2 receives the transmission request for the print data whose range is specified as described above, the server 2 extracts the print data (d3 and d4) of the requested portion and transmits it to the printer 3 (S160). The print data d4 corresponds to the print data that has not been transmitted by the server 2. Therefore, the transmission of the print data d3 and the print data d4 by the server 2 corresponds to “transmit a part including the untransmitted portion of the entire processing data”. When the print data is received and stored in the reception buffer 32, the controller 31 of the printer 3 transfers to the processing buffer 33 and performs pre-printing processing to execute printing, as described above. Therefore, after the error is resolved, the print data d2 is directly resumed in the pre-printing process or printing, and is discarded from the processing buffer 33 after the printing is completed. Further, the print data d3 and the print data d4 are transmitted from the server 2 to the printer 3, and pre-printing processing and printing are performed.

  Next, the case of the second group error (when the whole is reacquired) will be described. When the error that has occurred is classified into the second group, the controller 31 discards the pre-printing process data, the pre-printing process process data, and the post-process data stored in the processing buffer 33, and prints the same as in S125. A transmission request is made for the entire included print data (S150). That is, with reference to FIG. 5, the controller 31 makes a transmission request for the print data d1, d2, d3, d4. In response to the transmission request from the printer 3, the server 2 sequentially transmits the entire print data (d1, d2, d3, d4) included in the print job to the printer 3 (S155). Then, the controller 31 of the printer 3 sequentially stores the print data transmitted from the server 2 in the reception buffer 32 in the same manner as in S130, and again starts the processing buffer 33 from the top of the print data d1 at the top of the print data indicated by the print job. And execute pre-printing processing and printing. Therefore, after the error is resolved, printing is executed again from the beginning. When printing corresponding to one print job is completed, the printer 3 notifies the server 2 of the print end as a print job status (S160). If there is no other print job for the printer 3, the server 2 communicates with the printer 3 using HTTP. The session is disconnected (S165). If an error occurs again after resuming printing, the window size is set to “0” in the ACK packet corresponding to the transmission of print data from the server 2 and transmitted to the server 2 as in S135. The operations after S140 are repeated.

  As described above, according to the present embodiment, the mode of the print data transmission request after session reconnection can be switched according to the content of the error that has occurred. If an error occurs, it is desirable to resume printing from the continuation of the interruption due to an error, the print data that has already been transferred to the processing buffer 33 and is the processing target of the pre-printing process (during or has been processed) No transmission request is made, and a transmission request is sent to the server for print data that has not yet been transferred to the processing buffer 33 and has not yet been processed for pre-print processing. Therefore, it is possible to prevent printing from being executed again by performing pre-print processing on the print data of the already printed portion or the portion of the print pre-processing portion. As a result, printing can be resumed from the continuation when printing is interrupted, so that consumables such as ink and print media can be prevented from being consumed unnecessarily. In addition, since printing is resumed from the continuation, the time required for printing can be shortened as compared with the case of printing again from the beginning. On the other hand, if an error occurs that it is desirable to reprint from the beginning, after the session is reconnected, a transmission request for the entire print data is made to the server again, and the entire print data is received from the server again. Then, the pre-printing process is performed again in order from the top of the print data, and the entire print data included in the print job can be printed again.

2. Other Embodiments The technical scope of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the example in which the data processing apparatus is applied to the printer has been described. However, the present invention can be applied to various apparatuses that request the processing data from the server and perform some processing using the processing data acquired from the server. It is. For example, it is applied to a game machine that receives game data from a server and provides a game. If an error occurs during an action game or shooting game stage, the error is classified into the second group. You may make it classify | categorize into this group.

  In addition, the errors exemplified in the above embodiment and their classification are examples, and other various errors are classified into the first group or the second group, and the errors exemplified in the above embodiment are classified. It is conceivable not to include or change the error classification exemplified in the above embodiment. For example, “waste liquid overflow”, which is an error in which printing cannot be continued because the waste liquid exceeds an allowable amount in a container for storing ink waste liquid, can be assumed as an error classified into the second group. For example, when the cover of the printer 3 is locked during printing, an error “open cover” is not detected (does not occur) during printing. Therefore, “open cover” is set to the first group and the second group during printing. It does not have to be classified into any of the groups. Further, for example, “power failure” may be classified into the first group, and after energization, printing may be resumed from the continuation of the interruption due to an error.

Further, the configuration of the buffer described in the above embodiment (FIG. 2) is merely an example, and the present invention is not limited to this. Further, the server 2 may perform part or all of the pre-printing process shown in the above embodiment. Alternatively, the server 2 may notify the printer 3 of an unrendered print target, the printer 3 may render the print target to generate print data, and perform pre-printing processing on the print data. Therefore, the format of the print data transmitted from the server 2 is not limited to the example shown in the above embodiment.
Moreover, although the said embodiment demonstrated the return from an error and an error, it is not restricted to this, It applies when returning after interrupting by other than an error, The reason for interruption is made into the 1st group or the 2nd group. It may be classified.

  In the first embodiment, the content information transmission request to reception and the print data transmission request to reception are performed in a series of HTTP sessions. However, the content information transmission request to reception (FIG. 4). (S115 to S120), the HTTP session may be disconnected, and the print data transmission request to reception may be performed so that the HTTP session is newly established before the print data transmission request (S125). Also, in the first embodiment, after re-establishing the HTTP session after error elimination (S145) and then making a transmission request for the entire print data (S150), after re-establishing the HTTP session, the transmission request for the entire print data Before performing S1, the content information transmission request to reception may be performed again in the same manner as S115 to S120. After that, the HTTP session may be disconnected once, the HTTP session may be established again, and a transmission request for the entire print data may be made in S125.

  1: Communication terminal 2: Server 3: Printer 4: Internet 21: Application server 22: SMTP server 23: HTTP server 24: XMPP server 31: Controller 32: Reception buffer 33: Processing buffer , 34: communication unit, 35: printing unit

Claims (6)

A request unit for requesting transmission of processing data to the server;
A receiving unit for receiving the processing data transmitted from the server in response to the transmission request;
A processing unit that sequentially acquires the received processing data and performs processing using the processing data;
With
When the processing unit suspends the acquisition of the processing data before completing the acquisition of the processing data and then re-acquires the processing data, the request unit has the first reason for interrupting the acquisition of the processing data. Of the entire processing data, a request for transmission is made for a portion that has not been acquired by the processing unit, and the reason for interrupting acquisition of the processing data is classified into a second group. A transmission request for the entire processing data,
Data processing device. The request unit performs a transmission request for the processing data of a portion that is not acquired by the processing unit, by specifying a range using an HTTP range header.
The data processing apparatus according to claim 2. The processing data is print data,
The processing unit is a processing unit that performs printing based on the acquired print data,
The reason to be classified into the first group corresponds to the occurrence of an error of at least one of no print medium, no color material, print medium type mismatch, and device cover open,
The reason for being classified into the second group corresponds to occurrence of an error of at least one of a print medium jam, a mechanical abnormality of the processing unit, and a power failure.
The data processing apparatus according to claim 1 or 2. A storage unit for storing processing data to be processed by the data processing device;
A transmission unit for transmitting the processing data to the data processing device;
With
When the transmission unit retransmits the processing data after suspending the transmission of the processing data before completing the transmission of the entire processing data, the reason for the transmission unit interrupting the transmission of the processing data is In the case of being classified into the first group, the transmission unit transmits a part including a part that has not been transmitted, and the reason for interrupting the transmission of the processing data is the second reason. When it is classified into a group, the entire processing data is transmitted.
server. A request process for requesting transmission of processing data to the server;
A receiving step of receiving the processing data transmitted from the server in response to the transmission request;
A processing step of sequentially obtaining the received processing data and performing processing using the processing data;
Including
The reason why the acquisition of the processing data is interrupted in the requesting step when the processing data is acquired again after the acquisition of the processing data is interrupted before the acquisition of the processing data is completed in the processing step. If it is classified into one group, a transmission request is made for a portion of the whole processing data that has not been acquired by the processing unit, and the reason for interrupting the acquisition of the processing data is classified into a second group If so, a transmission request is made for the entire processing data.
Data processing method of data processing apparatus. A storage step for storing processing data to be processed by the data processing device;
A transmission step of transmitting the processing data to the data processing device;
Including
The reason why the transmission of the processing data is interrupted in the transmission step when the processing data is retransmitted after the transmission of the processing data is interrupted before the transmission of the entire processing data is completed in the transmission step Is classified into the first group, the transmission unit transmits a part of the entire processing data including a part that has not been transmitted, and the reason for interrupting the transmission of the processing data is the second reason. When the data is classified into the group, the entire processing data is transmitted.
How the server processes data.

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