WO2024011856A1

WO2024011856A1 - Metadata acquisition method and apparatus, and device and storage medium

Info

Publication number: WO2024011856A1
Application number: PCT/CN2022/141550
Authority: WO
Inventors: 佘文生; 陈俊; 刘宽; 夏勇; 段江南; 黄景平
Original assignee: 天翼云科技有限公司
Priority date: 2022-07-15
Filing date: 2022-12-23
Publication date: 2024-01-18
Also published as: CN115292250A

Abstract

A metadata acquisition method and apparatus, and a device and a storage medium. The method comprises: a virtual machine acquiring system management peripheral information of its own operating system on the basis of a system query command, which is input by a use subject (S201); and the virtual machine obtaining corresponding metadata from the system management peripheral information, wherein the metadata is used for an initialization configuration operation of the virtual machine (S202). By means of the method, no plug-in CDROM is required, no CDROM drive letter is occupied, and the situations of mistakenly deleting a file, disclosing a file, etc., due to opening a CDROM operation permission to the use subject are prevented, thereby effectively reducing the security risk of the loss of a metadata file. In addition, the method is executed inside the virtual machine, and the corresponding metadata is acquired without the need for network communication with another terminal device, such that when the metadata of the virtual machine is acquired in batches, a large amount of metadata can be quickly and accurately acquired by means of a relatively small network bandwidth.

Description

Metadata acquisition methods, devices, equipment and storage media

Technical field

This application relates to the field of virtualization technology and provides a metadata acquisition method, device, equipment and storage medium.

Background technique

When a virtual machine such as a cloud computer or cloud desktop is just started, the cloud host initialization program (cloud-init) and other services inside the virtual machine need to obtain the virtual machine metadata and perform initial configuration operations such as name, password, and network. Currently, the following two methods are commonly used to obtain the metadata of a virtual machine:

One is the Compact Disc Read-Only Memory (cdrom), mount the file containing metadata information to the virtual machine, and then read the cdrom information inside the virtual machine to obtain the corresponding virtual machine metadata. However, this method of obtaining metadata not only occupies the CDROM drive letter of the virtual machine, making it impossible for the virtual machine to plug in other CDROMs, but also increases the security risk of metadata file loss because it opens CDROM operation permissions to the user.

The other is to establish a network channel for the virtual machine to access an external metadata server, and obtain the corresponding metadata from the metadata server through the established network channel. However, when obtaining metadata in batches, the virtual machine needs to access the metadata server multiple times, which will occupy a high network bandwidth, which not only affects the normal network communication function of the virtual machine, but also easily causes network abnormalities and increases the failure of metadata acquisition. Rate.

technical problem

Embodiments of the present application provide a metadata acquisition method, device, equipment, and storage medium to solve the problems of occupying cdrom drive letters, occupying high network bandwidth, and having a high risk of file loss.

Technical solutions

In the first aspect, embodiments of the present application provide a method for obtaining metadata, including:

Obtain the system management peripheral information of its own operating system based on the system query command entered using the object;

Corresponding metadata is obtained from the system management peripheral information, and the metadata is used for initial configuration operations of the virtual machine.

Optionally, the system query command based on the object input is used to obtain the system management peripheral information of the own operating system, including:

Based on the system query command input by the use object, the system management peripheral information of the own operating system is obtained from the virtual machine startup parameters.

Optionally, before obtaining the system management peripheral information of the own operating system based on the system query command input using the object, it also includes:

In response to a command input operation triggered by the usage object, a command input interface is presented to the usage object, so that the usage object inputs the system query command in the command input interface.

Optionally, after presenting the command input interface to the user object, and before obtaining the system management peripheral information of the own operating system based on the system query command input by the user object, it also includes:

Obtain the system query command input using the object;

Determine whether the system query command is a legal command. If so, continue to obtain the system management peripheral information of its own operating system based on the system query command input by the user object; otherwise, send an alarm message to the user object to prompt the other party to restart Enter a new system query command.

Optionally, determine whether the system query command is a legal command by performing the following operations:

Based on the system type of the operating system, obtain the corresponding grammar rules;

Determine whether the system query command complies with the grammatical rule. If so, the system query command is determined to be a legal command; otherwise, the system query command is determined to be an illegal command.

In a second aspect, embodiments of the present application also provide a metadata acquisition device, including:

The acquisition unit is used to obtain the system management peripheral information of its own operating system based on the system query command input using the object;

A processing unit configured to obtain corresponding metadata from the system management peripheral information, and the metadata is used for initial configuration operations of the virtual machine.

Optionally, the acquisition unit is used for:

Optionally, before obtaining the system management peripheral information of its own operating system based on the system query command input using the object, the metadata acquisition device further includes an interface presentation unit, and the interface presentation unit is used for:

Optionally, after presenting the command input interface to the user object, and before obtaining the system management peripheral information of the own operating system based on the system query command input by the user object, the metadata acquisition device further includes a command audit unit, The command audit unit is used for:

Obtain the system query command input using the object;

Optionally, the command audit unit determines whether the system query command is a legal command by performing the following operations:

In a third aspect, embodiments of the present application further provide a computer device, including a processor and a memory, wherein the memory stores program code, and when the program code is executed by the processor, the processor Perform the steps for any of the above metadata acquisition methods.

In a fourth aspect, embodiments of the present application also provide a computer-readable storage medium, which includes program code. When the program product is run on a computer device, the program code is used to cause the computer device to execute any of the above. The steps of the metadata acquisition method.

The beneficial effects of this application are as follows:

Embodiments of the present application provide a metadata acquisition method, device, equipment and storage medium. The method includes: obtaining the system management peripheral information of its own operating system based on a system query command input using an object; and then obtaining the system management peripheral information from the system management peripheral The corresponding metadata is obtained from the information, which is used for the initial configuration operation of the virtual machine.

Compared with the traditional metadata acquisition method, the method provided by the embodiment of the present application does not require external cdrom. Therefore, the cdrom drive letter will not be occupied, and the cdrom operation permission will not be opened to the user, causing accidental deletion of files, etc. In situations such as file leakage, the security risk of metadata file loss is effectively reduced.

In addition, the method provided by the embodiment of the present application is executed inside the virtual machine and does not require network communication with other terminal devices to obtain the corresponding metadata. Therefore, when the metadata of the virtual machine is obtained in batches, the virtual machine will not be affected. Under the condition of normal network communication function, a large amount of metadata can be obtained quickly and accurately at a small cost of network bandwidth.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1A is an optional schematic diagram of an application scenario in the embodiment of the present application;

Figure 1B is an optional schematic diagram of another application scenario in the embodiment of the present application;

Figure 2A is a schematic flowchart of obtaining metadata provided by an embodiment of the present application;

Figure 2B is a schematic diagram of the command input interface provided by the embodiment of the present application;

Figure 2C is a schematic diagram of alarm information provided by an embodiment of the present application;

Figure 3A is a schematic flowchart of obtaining metadata in the kvm virtual machine of centos7 provided by the embodiment of the present application;

Figure 3B is a logical schematic diagram of obtaining metadata in the kvm virtual machine of centos7 provided by the embodiment of the present application;

Figure 4 is a schematic structural diagram of a metadata acquisition device provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of a computer device provided in an embodiment of the present application;

Figure 6 is a schematic structural diagram of a computing device in an embodiment of the present application.

Embodiments of the invention

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are Some embodiments of the technical solution, rather than all embodiments. Based on the embodiments recorded in the application documents, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the technical solution of this application.

Some terms used in the embodiments of this application are explained below to facilitate understanding by those skilled in the art.

1. Cloud host initialization program (cloud-init):

cloud-init is an open source cloud initialization program, which is widely used in major cloud platforms and is used to initialize the customized information (such as host name, password, user data, etc.) specified in the newly created elastic cloud server. configuration.

2. Compact Disc Read-Only Memory (cdrom):

CDROM is an external memory device, a type of optical disc used on computers. This kind of optical disc can only write data once, and the information will be permanently stored on the optical disc. When using it, you need to use the optical disc drive to read the information.

3. Virtual Machine:

A virtual machine is an emulator of a computer system. It simulates a complete computer system with complete hardware system functions and runs in a completely isolated environment through software, which can provide the functions of a physical computer.

According to the application scenarios of virtual machines and their correlation with direct machines, they can be divided into system virtual machines and program virtual machines. A system virtual machine provides a complete system platform that can run a complete operating system, while a program virtual machine is designed to run a single computer program. However, no matter which virtual machine is used, its essence is software running on the virtual machine and is limited to the resources provided by the virtual machine.

The design ideas of the embodiments of this application are briefly introduced below:

When a virtual machine such as a cloud computer or cloud desktop is just started, services such as cloud-init inside the virtual machine need to obtain the virtual machine metadata and perform initial configuration operations such as name, password, and network. Currently, the following two methods are commonly used to obtain the metadata of a virtual machine:

One is to mount files containing metadata information to the virtual machine in the form of cdrom, and then read the cdrom information inside the virtual machine to obtain the corresponding virtual machine metadata. However, this method of obtaining metadata not only occupies the CDROM drive letter of the virtual machine, making it impossible for the virtual machine to plug in other CDROMs, but also increases the security risk of metadata file loss because it opens CDROM operation permissions to the user.

In view of this, embodiments of the present application provide a method for obtaining metadata. The method includes: obtaining system management peripheral information of its own operating system based on a system query command input using an object; and then obtaining corresponding virtual machine metadata from the system management peripheral information, and the metadata is used for initial configuration of the virtual machine operate.

The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present application, and are not used to limit the present application. In the absence of conflict, the present application The embodiments and features of the embodiments may be combined with each other.

Figure 1A shows one of the application scenarios of the embodiment of the present application. This scenario includes multiple physical terminal devices 110. Wired communication or wireless communication is established between each physical terminal device 110, and each physical terminal device 110 can be located in the same local area network or in different local area networks, which is not limited in this application.

The physical terminal device 110 runs the deployed virtual machine software in response to the launch operation triggered using the object. When the virtual machine is started, the virtual machine obtains the system management peripheral information of its own operating system based on the system query command entered using the object; and then obtains the corresponding metadata from the system management peripheral information, which is used for the virtual machine. Initialize configuration operations.

Figure 1B shows another application scenario of the embodiment of the present application. This scenario includes two physical terminal devices 110' and a server 130'. Wired communication or wireless communication is established between each physical terminal device 110' and the server 130', which is not limited in this application.

In response to the access operation triggered by the usage object, the physical terminal device 110' presents the access interface 120' to it; and then remotely accesses the virtual machine on the server 130' based on the URL and other information input by the usage object in the access interface 120'. When the virtual machine is started, the virtual machine obtains the system management peripheral information of its own operating system based on the system query command entered using the object; and then obtains the corresponding metadata from the system management peripheral information, which is used for the virtual machine. Initialize configuration operations.

Among them, the physical terminal device 110 and the physical terminal device 110' in the embodiment of the present application are both computer devices used by users. Computer equipment can be personal computers, mobile phones, tablets, notebooks, e-book readers, smart homes and other computer equipment with certain computing capabilities.

The server 130' in the embodiment of the present application can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or can provide cloud services, cloud databases, cloud computing, cloud functions, and cloud storage. , network services, cloud communications, middleware services, domain name services, security services, content distribution network (Content Delivery Network (CDN), as well as cloud servers for basic cloud computing services such as big data and artificial intelligence platforms, this application is not limited here.

Referring to the schematic flow chart shown in Figure 2A, when the virtual machine is started, the process of obtaining virtual machine metadata is as follows:

S201: The virtual machine obtains the system management peripheral information of its own operating system based on the system query command input using the object.

Before performing step 201, the virtual machine responds to a command input operation triggered by the use object and presents a command input interface to the use object, so that the use object inputs a system query command in the command input interface.

For example, the user enters the su command in the terminal interface of the virtual machine and presses Enter. When the word "password" appears on the terminal interface, the user then enters the account password of the virtual machine, and the user is presented with the command input interface shown in Figure 2B.

Next, after presenting the command input interface to the user object, before executing step 201, the virtual machine obtains the system query command input by the user object, and then determines whether the system query command is a legal command. If so, continues the system query based on the user object input. command to obtain the system management peripheral information of its own operating system; otherwise, an alarm message is sent to the user object, prompting the other party to re-enter a new system query command.

Specifically, the virtual machine can determine whether the system query command entered using the object is a legal command by performing the following operations:

Based on the system type of the operating system, the virtual machine obtains the corresponding syntax rules; and then determines whether the system query command complies with the syntax rules. If so, the system query command is determined to be a legal command; otherwise, the system query command is determined to be an illegal command.

In this embodiment of the present application, corresponding syntax rules are configured for different types of operating systems. Use the dmidecode command in a virtual machine running the Linux operating system to view system management peripheral information; use the wmic command in a virtual machine running the Windows operating system to view system management peripheral information.

Assume that the Linux operating system is running on the virtual machine, and the system query command entered by the user is "wmic –oem-string 1". Since this command does not comply with the syntax rules of the operating system, the virtual machine will ask the user in the command input interface. The warning message "Not an internal or external command, nor an operable program, please re-enter the system command" as shown in Figure 2C is displayed, prompting the other party to re-enter a new system query command.

Assume that the Linux operating system is running on the virtual machine, and the system query command entered by the user is "dmidecode –oem-string 1", because the command complies with the syntax rules of the operating system, the virtual machine determines that the system query command is a legal command, and then obtains the system management peripheral information of its own operating system based on the system query command.

In the method for obtaining virtual machine metadata provided by the embodiments of this application, the system administrator adds customized system management peripherals (i.e. System Management Basic Input Output System, smbios) field. This field contains the metadata required when the virtual machine starts. Therefore, when the virtual machine starts, you can obtain the system management peripheral information of its own operating system from the virtual machine startup parameters by using the system query command entered by the object.

For example, taking the kvm virtual machine that starts centos7 as an example, add the system management peripheral field "-smbios" to the virtual machine startup parameters. type=11,value=name=centos7-test1", the value of this field is the metadata "name=centos7-test1" required when starting the virtual machine.

S202: The virtual machine obtains corresponding metadata from the system management peripheral information, and the metadata is used for the initial configuration operation of the virtual machine.

Following the above example, take the kvm virtual machine that starts centos7 as an example. The system query command entered by the user is "dmidecode –oem-string 1". The virtual machine obtains the corresponding metadata from the system management peripheral information based on the data information to be queried. "name=centos7-test1". Compared with the traditional metadata acquisition method, the method provided by the embodiment of the present application does not require external cdrom. Therefore, the cdrom drive letter will not be occupied, and the cdrom operation permission will not be opened to the user, causing accidental deletion of files, etc. In situations such as file leakage, the security risk of metadata file loss is effectively reduced.

Referring to the flow diagram shown in Figure 3A and the logic diagram shown in Figure 3B, the process of obtaining metadata in the kvm virtual machine of centos7 is as follows:

S301: When the virtual machine starts, the user sends the su command to the virtual machine and executes the Enter operation;

S302: When the virtual machine receives the su command, in response to the enter operation triggered by the user, a prompt message of "enter password" is displayed in the terminal interface;

S303: The user sends the corresponding account password to the virtual machine;

S304: When the virtual machine receives the account password, it presents the command input interface to the user;

S305: The user sends the system query command "dmidecode –oem-string 1" to the virtual machine;

S306: When the virtual machine determines that the system query command is a legal command, it obtains the system management peripheral information of its own operating system based on the system query command;

S307: The virtual machine obtains the corresponding metadata "name=centos7-test1" from the system management peripheral information;

S308: The virtual machine presents the corresponding metadata "name=centos7-test1" to the user.

Based on the same inventive concept as the above method embodiments, embodiments of the present application also provide a metadata acquisition device. As shown in Figure 4, the metadata acquisition device 400 may include:

The acquisition unit 401 is used to obtain the system management peripheral information of its own operating system based on the system query command input using the object;

The processing unit 402 is configured to obtain corresponding metadata from the system management peripheral information, and the metadata is used for the initial configuration operation of the virtual machine.

Optionally, the acquisition unit 401 is used for:

Based on the system query command input using the object, the system management peripheral information of the own operating system is obtained from the virtual machine startup parameters.

Optionally, before obtaining the system management peripheral information of its own operating system based on the system query command input using the object, the metadata acquisition device 400 also includes an interface presentation unit 403, which is used to:

In response to a command input operation triggered by the usage object, a command input interface is presented to the usage object, so that the usage object inputs a system query command in the command input interface.

Optionally, after presenting the command input interface to the user object, and before obtaining the system management peripheral information of its own operating system based on the system query command input by the user object, the metadata acquisition device 400 further includes a command audit unit 404 to perform command auditing. Unit 404 is used for:

Get system query commands using object input;

Determine whether the system query command is a legal command. If so, continue to obtain the system management peripheral information of its own operating system based on the system query command entered by the user object; otherwise, send an alarm message to the user object and prompt the other party to re-enter a new system query command. .

Optionally, the command audit unit 404 determines whether the system query command is a legal command by performing the following operations:

Based on the system type of the operating system, obtain the corresponding syntax rules;

Determine whether the system query command complies with the grammatical rules. If so, the system query command is determined to be a legal command; otherwise, the system query command is determined to be an illegal command.

For the convenience of description, each of the above parts is divided into modules (or units) according to their functions and described separately. Of course, when implementing this application, the functions of each module (or unit) can be implemented in the same or multiple software or hardware.

After introducing the access method and device of the service platform according to the exemplary embodiment of the present application, next, a computer device according to another exemplary embodiment of the present application is introduced.

Those skilled in the art can understand that various aspects of the present application can be implemented as systems, methods or program products. Therefore, various aspects of the present application can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be collectively referred to herein as "Circuits", "modules" or "systems".

Based on the same inventive concept as the above method embodiments, embodiments of the present application also provide a computer device. Referring to FIG. 5 , the computer device 500 may include at least a processor 501 and a memory 502 . The memory 502 stores program code. When the program code is executed by the processor 501, it causes the processor 501 to perform the steps of any of the above metadata acquisition methods.

In some possible implementations, a computing device according to the present application may include at least one processor, and at least one memory. The memory stores program code. When the program code is executed by the processor, it causes the processor to perform the steps in the metadata acquisition method described above in this specification according to various exemplary embodiments of the present application. For example, the processor may perform the steps shown in Figure 2A.

A computing device 600 according to this embodiment of the present application is described below with reference to FIG. 6 . The computing device 600 in FIG. 6 is only an example and should not impose any limitations on the functions and usage scope of the embodiments of the present application.

As shown in Figure 6, computing device 600 is embodied in the form of a general-purpose computing device. The components of the computing device 600 may include, but are not limited to: the above-mentioned at least one processing unit 601, the above-mentioned at least one storage unit 602, and a bus 603 connecting different system components (including the storage unit 602 and the processing unit 601).

Bus 603 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, or a local bus using any of a variety of bus structures.

The storage unit 602 may include a readable medium in the form of a volatile memory, such as a random access memory (RAM) 6021 and/or a cache storage unit 6022, and may further include a read-only memory (ROM) 6023.

Storage unit 602 may also include a program/utility 6025 having a set of (at least one) program modules 6024 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, Each of these examples, or some combination, may include the implementation of a network environment.

Computing device 600 may also communicate with one or more external devices 604 (e.g., keyboard, pointing device, etc.), with one or more devices that enable a user to interact with computing device 600, and/or with one or more devices that enable the computing device 600 to 600 can communicate with any device (eg, router, modem, etc.) that can communicate with one or more other computing devices. This communication may occur through input/output (I/O) interface 605. Also, computing device 600 may communicate with one or more networks (eg, a local area network (LAN), a wide area network (WAN), and/or a public network, such as the Internet) through network adapter 606 . As shown, network adapter 606 communicates with other modules for computing device 600 via bus 603 . It should be understood that, although not shown in the figures, other hardware and/or software modules may be used in conjunction with computing device 600, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives And data backup storage system, etc.

Based on the same inventive concept as the above method embodiments, various aspects of the metadata acquisition method provided by this application can also be implemented in the form of a program product, which includes program code. When the program product is run on a computer device, the program code is In order to cause the computer device to perform the steps in the metadata acquisition method according to various exemplary embodiments of the present application described above in this specification, for example, the computer device may perform the steps shown in FIG. 2A.

The Program Product may take the form of one or more readable media in any combination. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

Although the preferred embodiments of the present application have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are understood. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of this application.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A method for obtaining metadata, which is characterized by including:

Obtain the system management peripheral information of its own operating system based on the system query command input using the object;

Corresponding metadata is obtained from the system management peripheral information, and the metadata is used for initial configuration operations of the virtual machine.
The method of claim 1, wherein the system query command input using an object is used to obtain the system management peripheral information of the own operating system, including:

Based on the system query command input by the use object, the system management peripheral information of the own operating system is obtained from the virtual machine startup parameters.
The method according to claim 1, characterized in that, before obtaining the system management peripheral information of its own operating system based on the system query command input using the object, it further includes:

In response to a command input operation triggered by the usage object, a command input interface is presented to the usage object, so that the usage object inputs the system query command in the command input interface.
The method of claim 3, wherein after presenting a command input interface to the user object and before obtaining the system management peripheral information of the own operating system based on the system query command input by the user object, the method further includes:

Obtain the system query command input using the object;

Determine whether the system query command is a legal command. If so, continue to obtain the system management peripheral information of its own operating system based on the system query command input by the user object; otherwise, send an alarm message to the user object to prompt the other party to restart Enter a new system query command.
The method of claim 4, wherein it is determined whether the system query command is a legal command by performing the following operations:

Based on the system type of the operating system, obtain the corresponding grammar rules;

Determine whether the system query command complies with the grammatical rule. If so, the system query command is determined to be a legal command; otherwise, the system query command is determined to be an illegal command.
A metadata acquisition device, characterized by including:

The acquisition unit is used to obtain the system management peripheral information of its own operating system based on the system query command input using the object;

A processing unit configured to obtain corresponding metadata from the system management peripheral information, and the metadata is used for initial configuration operations of the virtual machine.
The device according to claim 6, characterized in that the acquisition unit is used for:

Based on the system query command input by the use object, the system management peripheral information of the own operating system is obtained from the virtual machine startup parameters.
The device according to claim 6, characterized in that, before obtaining the system management peripheral information of its own operating system based on the system query command input using the object, the metadata acquisition device further includes an interface presentation unit, and the interface Presentation units are used for:

In response to a command input operation triggered by the usage object, a command input interface is presented to the usage object, so that the usage object inputs the system query command in the command input interface.
A computer device, characterized in that it includes a processor and a memory, wherein the memory stores program code, and when the program code is executed by the processor, it causes the processor to execute claims 1 to 5 The steps of any of the methods.
A computer-readable storage medium, characterized in that it includes program code. When the program code is run on a computer device, the program code is used to cause the computer device to execute any one of claims 1 to 5. The steps of the method.