WO2018098919A1

WO2018098919A1 - Automatic update method and device for qt program

Info

Publication number: WO2018098919A1
Application number: PCT/CN2017/075723
Authority: WO
Inventors: 徐超
Original assignee: 武汉斗鱼网络科技有限公司
Priority date: 2016-12-01
Filing date: 2017-03-06
Publication date: 2018-06-07
Also published as: CN106648761B; CN106648761A

Abstract

The present invention relates to the technical field of computer programs, and particularly relates to an automatic update method and device for a Qt program. The method comprises: acquiring an update information file (101); determining, by means of comparing a parsing result of the update information file against corresponding local information, whether the corresponding local information needs an update (104); if so, then initiating an update to overwrite the corresponding local information with an update file (105); and if not, then preserving the local information. The device of the present invention can be employed to implement the above method. The method and device of the present invention improve update efficiency and reduce update complexity.

Description

Method and device for automatically updating in QT program

Technical field

The present invention relates to the field of computer program technologies, and in particular, to a method and apparatus for automatically updating in a QT program.

Background technique

The Qt program is a cross-platform C++ graphical user interface application development framework that can be used to develop both GUI programs and non-GUI programs such as console tools and servers. Qt programs are object-oriented frameworks that use special code generation extensions, as well as some macros that are easy to extend and allow components to become. After the development of the Qt program is released, there will be an automatic update version. However, the general update is simply to directly overwrite the new version of the file from the server to the local file, and does not involve the special case of modular update, update file check, update level mechanism, etc., and the general update The update check is performed as soon as the main program is started, and the update is frequently verified. In addition, the general update, update information file structure is too complicated, and the update program cannot be updated.

Summary of the invention

In view of this, the present invention provides a method and apparatus for automatically updating in a QT program, which can improve update efficiency and reduce update complexity, thereby being more suitable for practical use.

In order to achieve the above first object, the technical solution of the method for automatically updating in the QT program provided by the present invention is as follows:

The method provided by the present invention for automatically updating in a QT program includes the following steps:

Obtain an update information file;

Determining whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information:

If an update is required, an update is initiated such that the update file overwrites corresponding local information;

If the update is not required, the local information is maintained.

The method for automatically updating in the QT program provided by the present invention can be further implemented by the following technical measures.

Advantageously, said parsing said update information file to obtain a parsed update information file comprises the steps of:

Loading the update information file and returning text objects and error values;

Judge the returned text object and the error value:

If the text object does not have an error message, returning the JSON object through the text object, and returning each field value in the form of a key-value pair to obtain the parsed update information file;

If the text object has an error message, the error is updated and the error is recalled.

Preferably, the version number of the local information is defined as a first version number, the version number of the parsed update information file is defined as a second version number, and the recommended version number of the parsed update information file is defined as a third version. number;

The comparing, by comparing the parsed update information file and the corresponding local information, determining whether the corresponding local information needs to be updated includes the following steps:

Comparing the string of the first version number with the string of the second version number:

If the character string of the first version number is not equal to the character string of the second version number, starting an update;

If the character string of the first version number is equal to the character string of the second version number, maintaining the Local information;

and / or,

Comparing the string of the first version number with the string of the third version number:

If the character string of the first version number is not equal to the character string of the third version number, starting an update;

If the character string of the first version number is equal to the character string of the third version number, maintaining the local information;

and / or,

Calculating the MD5 value of the local information and obtaining the first MD5 value, calculating the MD5 value of the parsed update information file and obtaining the second MD5 value:

If the first MD5 value is not equal to the second MD5 value, starting an update;

If the first MD5 value is equal to the second MD5 value, the local information is maintained.

Preferably, the method for calculating the MD5 value comprises the following steps:

Obtaining a hash function object of the file object to be calculated;

Applying the hash function object to add file data to be calculated;

Calculating and returning an MD5 value of the file to be calculated according to the file data to be calculated;

The first MD5 value and the second MD5 value are notified to the main program by a checkback function of the update listener interface of the dynamic link library.

Preferably, the method of automatically updating in the QT program further comprises the following steps:

Get two starts adjacent to the updated time T ₁ and T _2;

Calculating a time difference t=|T ₂ -T ₁ | of the two adjacent startup updates;

Compare the relationship between the time difference t of the two adjacent start-up updates and the update threshold t ₀ :

When t>t ₀ , the update is started;

When t ≤ t ₀ , the update is rejected.

In order to achieve the above second object, the technical solution of the device automatically updated in the QT program provided by the present invention is as follows:

The apparatus for automatically updating in a QT program provided by the present invention includes an update information file acquiring unit, a comparison determining unit, and an updating unit,

The update information file obtaining unit is configured to acquire an update information file;

The comparison determining unit is configured to determine whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information:

When the result of the comparison determination unit is that the update is required, the update unit is configured to perform an update according to the determination result of the comparison determination unit, so that the update file covers the corresponding local information;

The local information is maintained when the result of the comparison judging unit is that no update is required.

The apparatus provided by the present invention for automatically updating in the QT program can be further implemented by the following technical measures.

Preferably, the file parsing unit comprises a loading module, an error value judging module, a field returning module, and an update callback module.

The loading module is configured to load the update information file and return a text object and an error value;

The error value judging module is configured to judge the returned text object and an error value:

When the judgment result of the error value judgment module is that the text object does not have error information, the field return module returns a JSON object through the text object, and returns each field value in the form of a key value pair to obtain the Parsed update information file;

When the judgment result of the error value judgment module is that the text object has error information, the The update callback module is used to update the error and call back the error.

Advantageously, said means for automatically updating in the QT program further comprises an MD5 value calculation unit,

The MD5 value calculation unit includes a hash function acquisition module, a file data addition module, and an MD5 value calculation return module.

The hash function obtaining module is configured to obtain a hash function object of the file object to be calculated;

The file data adding module is configured to apply the hash function object to add file data to be calculated;

The MD5 value calculation returning module is configured to calculate and return an MD5 value of the file to be calculated according to the file data to be calculated.

Advantageously, the comparison determination unit comprises a first comparison module and/or a second comparison module and/or a second comparison module and/or a third comparison module,

The first comparison module is configured to compare the first version number and the second version number, and when the first version number and the second version number are not equal, start an update; when the first version number and the When the second version numbers are equal, the local information is maintained;

The second comparison module is configured to compare the first version number and the third version number, and when the first version number and the third version number are not equal, start an update; when the first version number and the When the third version number is equal, the local information is maintained;

The third comparison module is configured to compare the first MD5 value and the second MD5 value, if the first MD5 value is not equal to the second MD5 value, initiate an update; if the first MD5 value is If the second MD5 values are equal, the local information is maintained;

among them,

The first version number is a version number of the local information, the second version number is a version number of the parsed update information file, and the third version number is a suggested version of the parsed update information file. number;

The first MD5 value is an MD5 value of local information, and the second MD5 value is an MD5 value of the parsed update information file.

Advantageously, said means for automatically updating in the QT program further comprises an update restriction unit,

The update restriction unit includes an update time acquisition module, an update time difference calculation module, and an update time difference comparison determination module.

The update time acquisition module is configured to acquire times T ₁ and T ₂ when the update is initiated twice;

Updating the time difference calculation module for calculating the starting time of the update of two adjacent difference _{_{t = | T 2 -T 1 |}} ;

The update difference comparing and judging means for comparing between two adjacent start the update time difference t and the updated threshold value t ₀ of the magnitude relationship, and decide whether to start the update:

When t>t ₀ , the update is started;

When t≤t _0, the refusal update.

The method and the device for automatically updating in the QT program provided by the present invention first obtain an update information file; after that, after comparing the parsed update information file and the corresponding local information, it is determined whether the corresponding local information needs to be updated. : If an update is needed, the update is initiated such that the update file overwrites the corresponding local information; if no update is required, the local information is maintained. Since there is a step of judging whether or not an update is required, the update is started only when it is determined that the corresponding local information needs to be updated, and is not updated when it is determined that the corresponding local information does not need to be updated, thereby avoiding A frequent verification update caused by an update check is performed as soon as the main program is started. Therefore, it can improve the update efficiency and reduce the update complexity.

DRAWINGS

Various other advantages and benefits will become apparent to those skilled in the art from a The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:

1 is a flow chart showing the steps of a method for automatically updating in a QT program according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a signal flow relationship relationship between devices automatically updated in a QT program according to Embodiment 2 of the present invention.

detailed description

In order to solve the problems existing in the prior art, the present invention provides a method and apparatus for automatically updating in a QT program, which can improve the update efficiency and reduce the update complexity, thereby being more suitable for practical use.

In order to further explain the technical means and functions of the present invention for achieving the intended purpose of the invention, the following describes a method and an apparatus for automatically updating in a QT program according to the present invention with reference to the accompanying drawings and preferred embodiments. , structure, characteristics and efficacy, as detailed below. In the following description, different "an embodiment" or "an embodiment" does not necessarily mean the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments can be combined in any suitable form.

The term “and/or” in this context is merely an association that describes an associated object, indicating that there may be three relationships, for example, A and/or B. The specific understanding is that A and B can be included at the same time, and can be separate. If A exists, B may exist alone, and any of the above three cases may be provided.

Embodiment 1

Referring to FIG. 1, a method for automatically updating in a QT program according to Embodiment 1 of the present invention includes Next steps:

Step 101: Obtain an update information file.

In this embodiment, the update information file is a JSON format file, and the tree structure of the JSON format file includes three layers; wherein the first layer is an update information layer, and the update information layer is used for saving information including a version number, an update time, and a suggestion. The version number and the update size; the second layer is the module information layer, the information used by the module information layer includes the module name, the version number, and the size; the third layer is the update file information layer, and the updated file information layer is used to save the information including File name, file MD5 value, file path. Among them, the JSON format file is the most efficient, and the file is designed as a three-layer tree structure, which can reduce the complexity of updating information. Specifically, the decrease in complexity is achieved by layering the updated basic information with the updated file information, and separating the update files in units of modules.

Step 102: The files that are transmitted by the network need to be compressed. Therefore, after the step 101, the updated information file needs to be decompressed to obtain the decompressed update information file. In this embodiment, the update information file is in the RAR or ZIP format. Compressed file.

Step 103: Parse the decompressed update information file to obtain a parsed update information file.

In this embodiment, parsing the decompressed update information file to obtain the parsed update information file includes the following steps: Step 1031: Load the decompressed update information file and return the text object and the error value; Step 1032: The text object and the error value are judged: if the text object does not have the error information, step 1033 is executed: the JSON object is returned by the text object, and each field value is returned in the form of a key-value pair to obtain the parsed update information file; If there is an error message in the text object, go to step 1034: Update the error and call back the error.

Step 104: Determine whether the corresponding local information needs to be updated by comparing the parsed update information file with the corresponding local information:

If the update is required, step 105 is performed to start the update, so that the update file covers the corresponding local information;

If no update is needed, go back to step 101.

The first mode of determining whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information includes the following steps: Step 10411: Define a version number of the local information as the first version number, Defining the version number of the parsed update information file as the second version number; Step 10412: Comparing the string of the first version number with the string of the second version number: Step 10413: If the string of the first version number is the second If the string of the version number is not equal, the update is started; Step 10414: If the string of the first version number is equal to the string of the second version number, the local information is maintained.

The second method of determining whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information includes the following steps: Step 10421: Define the version number of the local information as the first version number. Defining the recommended version number of the parsed update information file as the third version number; Step 10422: Comparing the string of the first version number with the string of the third version number: Step 10423: If the string of the first version number and the first If the strings of the three version numbers are not equal, the update is started; Step 10424: If the string of the first version number is equal to the string of the third version number, the local information is maintained.

When comparing the first version number and the second version number, when the current field is the same, the comparison of the next field is continued until the comparison is obtained, and the first version number is considered to be small, and the update is started. For example, when the first version number is 1.0.1 and the second version number is 1.1.0, the second field is performed because the first field of the first version number and the first field of the second version number are both “1”. The comparison, because the first field of the first version number is "0", and the second field of the second version number is "1", can get unequal results, at this time, I think the first version number is small.

Alternatively, when comparing the first version number and the third version number, when the first version number and the second version number are not equal, the fuzzy update is started, that is, the random update is performed according to the random number. For example, when the first version number is 1.0.1 and the third version number is 1.1.0, during the comparison, since 1.0.1≠1.1.0, the fuzzy update is started, that is, the random update is performed according to the random number.

The third mode of determining whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information includes the following steps: Step 10431: Calculate the MD5 value of the local information and obtain the first MD5 value. Calculating the MD5 value of the parsed update information file and obtaining the second MD5 value; Step 10432: If the first MD5 value is not equal to the second MD5 value, starting the update; Step 10433: If the first MD5 value and the second MD5 If the values are equal, the local information is maintained.

The method for calculating the value of the MD5 includes the following steps: Step 104311: Acquire a hash function object of the file object to be calculated using the QT QCryptographicHash hash (QCryptographicHash::Md5); Step 104312: Add the file to be calculated by using the adddata method of the hash function object Data; Step 104313: Calculate and return the MD5 value of the file to be calculated by md5C=hash.result().toHex(); according to the file data to be calculated.

In this embodiment, the first MD5 value and the second MD5 value are notified to the main program by using a checkback function of the update listener interface of the dynamic link library, and the dynamic link database is specifically:

Define an IUpdate interface and an IListener callback interface for external calls. interface:

Since all the modules are connected through the interface, command line parameters, and download files, the coupling degree between the modules and the modules can be well reduced, and thus the update and modification of each module is relatively independent.

In addition, the method of automatically updating in the QT program further includes the following steps between step 104 and step 105:

Step z1: obtaining times T ₁ and T _{2 of the} two adjacent start-ups;

Step z2: Calculate the time difference t=|T ₂ -T ₁ |

Step z3: Compare the relationship between the time difference t of the two adjacent start-up updates and the update threshold t ₀ : when t>t ₀ , the update is initiated; when t≤t ₀ , the update is rejected.

In this case, frequent updates can be avoided.

The method for automatically updating in the QT program provided by the present invention first obtains an update information file; after that, decompressing the update information file to obtain a decompressed update information file; and then parsing the decompressed update information file, Obtaining the parsed update information file; then, by comparing the parsed update information file and the corresponding local information, determining whether the corresponding local information needs to be updated: if an update is required, starting the update, so that the update file is Overwrite the corresponding local information; if no updates are needed, maintain local information. Since there is a step of judging whether or not an update is required, the update is started only when it is determined that the corresponding local information needs to be updated, and is not updated when it is determined that the corresponding local information does not need to be updated, thereby avoiding A frequent verification update caused by an update check is performed as soon as the main program is started. Therefore, it can improve the update efficiency and reduce the update complexity.

Embodiment 2

Referring to FIG. 2, an apparatus for automatically updating in a QT program according to Embodiment 2 of the present invention includes an update information file obtaining unit 201, a decompressing unit 202, a file parsing unit 203, a comparison judging unit 204, and an updating unit 205. The update information file obtaining unit 201 is configured to obtain an update information file; the decompression unit 202 is configured to decompress the update information file to obtain a decompressed update information file; and the file parsing unit 203 is configured to parse the decompressed update information file to obtain The parsed update information file; the comparison judging unit 204 is configured to judge whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information: when the result of the comparison judging unit 204 needs to be updated, the update unit 205 is configured to update according to the judgment result of the comparison judgment unit, so that the update file covers the corresponding local information; when the result of the comparison judgment unit 204 does not need to be updated, the local information is maintained.

The file parsing unit 203 includes a loading module, an error value judging module, and a field return module. Update the callback module. The loading module is configured to load the decompressed update information file and return a text object and an error value; the error value judging module is configured to judge the returned text object and the error value: when the error value judging module judges that the text object does not exist In the error message, the field return module returns the JSON object through the text object, and returns each field value in the form of a key-value pair to obtain the parsed update information file; when the error value judgment module determines that the text object has an error message The update callback module is used to update the error and call back the error.

Among them, the device automatically updated in the QT program further includes an MD5 value calculation unit. The MD5 value calculation unit includes a hash function acquisition module, a file data addition module, and an MD5 value calculation return module. The hash function obtaining module is configured to obtain a hash function object of the file object to be calculated; the file data adding module is configured to apply the hash function object to add the to-be-calculated file data; and the MD5 value calculation returning module is configured to calculate and return according to the file data to be calculated. MD5 value of the file to be calculated.

The comparison judging unit 204 includes a first comparison module and/or a second comparison module and/or a second comparison module and/or a third comparison module. The first comparison module is configured to compare the first version number and the second version number. When the first version number and the second version number are not equal, the update is started; when the first version number is equal to the second version number, the first version is maintained. Local information. The second comparison module is configured to compare the first version number and the third version number. When the first version number and the third version number are not equal, the update is started; when the first version number is equal to the third version number, the Local information. The third comparison module is configured to compare the first MD5 value and the second MD5 value, and if the first MD5 value and the second MD5 value are not equal, start an update; if the first MD5 value is equal to the second MD5 value, the local information is maintained. . The first version number is the version number of the local information, the second version number is the version number of the parsed update information file, and the third version number is the suggested version number of the parsed update information file. The first MD5 value is the MD5 value of the local information, and the second MD5 value is the MD5 value of the parsed update information file.

In addition, the device that is automatically updated in the QT program further includes an update restriction unit. The update restriction unit includes an update time acquisition module, an update time difference calculation module, and an update time difference comparison determination module. The update time acquisition module is configured to acquire the times T ₁ and T _{2 of the} two adjacent start updates; the update time difference calculation module is configured to calculate the time difference t=|T ₂ -T ₁ | of the two adjacent start updates; The module is used to compare the magnitude relationship between the time difference t of the two adjacent start-up updates and the update threshold t ₀ , and decide whether to start the update: when t>t ₀ , the update is initiated; when t≤t ₀ , the update is rejected. In this case, frequent updates can be avoided.

The device automatically updated in the QT program provided by the present invention first obtains the update information file by the update information file obtaining unit 201; after that, the decompressing unit 202 decompresses the update information file to obtain the decompressed update information file; And parsing the decompressed update information file by the file parsing unit 203 to obtain the parsed update information file; and then comparing the parsed update information file and the corresponding local information by the comparison judging unit 204, determining the Whether the corresponding local information needs to be updated: if an update is required, the update is initiated by the update unit 205 so that the update file overwrites the corresponding local information; if no update is required, the local information is maintained. Since the comparison judging unit 204 is present, the update unit is triggered to start the update only when it is determined that the corresponding local information needs to be updated, and the update unit 205 is not triggered to be updated when it is determined that the corresponding local information does not need to be updated. Therefore, it is possible to avoid frequent verification updates caused by the update check as long as the main program is started. Therefore, it can improve the update efficiency and reduce the update complexity.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the present invention. The spirit and scope of the Ming. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A method for automatically updating in a QT program, comprising the steps of:

Obtain an update information file;

Determining whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information:

If an update is required, an update is initiated such that the update file overwrites corresponding local information;

If the update is not required, the local information is maintained.
The method of automatically updating in a QT program according to claim 1, wherein the parsing the update information file to obtain the parsed update information file comprises the following steps:

Loading the update information file and returning text objects and error values;

Judge the returned text object and the error value:

If the text object does not have an error message, returning the JSON object through the text object, and returning each field value in the form of a key-value pair to obtain the parsed update information file;

If the text object has an error message, the error is updated and the error is recalled.
The method of automatically updating in a QT program according to claim 1, wherein the version number of the local information is defined as a first version number, and the version number of the parsed update information file is defined as a second version number, and the The suggested version number of the parsed update information file is the third version number;

It is characterized in that

The comparing, by comparing the parsed update information file and the corresponding local information, determining whether the corresponding local information needs to be updated includes the following steps:

Comparing the string of the first version number with the string of the second version number:

If the character string of the first version number is not equal to the character string of the second version number, start more new;

If the character string of the first version number is equal to the character string of the second version number, maintaining the local information;

and / or,

Comparing the string of the first version number with the string of the third version number:

If the character string of the first version number is not equal to the character string of the third version number, starting an update;

If the character string of the first version number is equal to the character string of the third version number, maintaining the local information;

and / or,

Calculating the MD5 value of the local information and obtaining the first MD5 value, calculating the MD5 value of the parsed update information file and obtaining the second MD5 value:

If the first MD5 value is not equal to the second MD5 value, starting an update;

If the first MD5 value is equal to the second MD5 value, the local information is maintained.
The method for automatically updating in a QT program according to claim 3, wherein the method for calculating the MD5 value comprises the following steps:

Obtaining a hash function object of the file object to be calculated;

Applying the hash function object to add file data to be calculated;

Calculating and returning an MD5 value of the file to be calculated according to the file data to be calculated;

The first MD5 value and the second MD5 value are notified to the main program by a checkback function of the update listener interface of the dynamic link library.
A method of automatically updating in a QT program according to claim 1, further comprising Includes the following steps:

Obtaining times T 1 and T 2 of two adjacent start-up updates;

Calculating a time difference t=|T 2 -T 1 | of the two adjacent startup updates;

Compare the relationship between the time difference t of the two adjacent start-up updates and the update threshold t 0 :

When t>t 0 , the update is started;

When t ≤ t 0 , the update is rejected.
An apparatus for automatically updating in a QT program, comprising: an update information file acquisition unit, a comparison determination unit, and an update unit,

The update information file obtaining unit is configured to acquire an update information file;

The comparison determining unit is configured to determine whether the corresponding local information needs to be updated by comparing the parsed update information file and the corresponding local information:

When the result of the comparison determination unit is that the update is required, the update unit is configured to perform an update according to the determination result of the comparison determination unit, so that the update file covers the corresponding local information;

The local information is maintained when the result of the comparison judging unit is that no update is required.
The apparatus for automatically updating in a QT program according to claim 6, wherein the file parsing unit comprises a loading module, an error value judging module, a field returning module, and an update callback module.

The loading module is configured to load the update information file and return a text object and an error value;

The error value judging module is configured to judge the returned text object and an error value:

When the judgment result of the error value judgment module is that the text object does not have error information, the field return module returns a JSON object through the text object, and returns each field value in the form of a key value pair to obtain the Parsed update information file;

When the judgment result of the error value judgment module is that the text object has error information, the update callback module is used to update the error and call back the error.
The apparatus for automatically updating in a QT program according to claim 6, further comprising an MD5 value calculation unit,

The MD5 value calculation unit includes a hash function acquisition module, a file data addition module, and an MD5 value calculation return module.

The hash function obtaining module is configured to obtain a hash function object of the file object to be calculated;

The file data adding module is configured to apply the hash function object to add file data to be calculated;

The MD5 value calculation returning module is configured to calculate and return an MD5 value of the file to be calculated according to the file data to be calculated.
The apparatus for automatically updating in a QT program according to claim 6, wherein the comparison judging unit comprises a first comparison module and/or a second comparison module and/or a second comparison module and/or a third comparison. Module,

The first comparison module is configured to compare the first version number and the second version number, and when the first version number and the second version number are not equal, start an update; when the first version number and the When the second version numbers are equal, the local information is maintained;

The second comparison module is configured to compare the first version number and the third version number, and when the first version number and the third version number are not equal, start an update; when the first version number and the When the third version number is equal, the local information is maintained;

The third comparison module is configured to compare the first MD5 value and the second MD5 value, if the first MD5 value is not equal to the second MD5 value, initiate an update; if the first MD5 value is If the second MD5 values are equal, the local information is maintained;

among them,

The first version number is a version number of the local information, the second version number is a version number of the parsed update information file, and the third version number is a suggested version number of the parsed update information file;

The first MD5 value is an MD5 value of local information, and the second MD5 value is an MD5 value of the parsed update information file.
The apparatus for automatically updating in a QT program according to claim 6, further comprising an update restriction unit,

The update restriction unit includes an update time acquisition module, an update time difference calculation module, and an update time difference comparison determination module.

The update time acquisition module is configured to acquire times T 1 and T 2 when the update is initiated twice;

The update time difference calculation module is configured to calculate a time difference t=|T 2 -T 1 | of the two adjacent startup updates;

The update time difference comparison judging module is configured to compare the size relationship between the time difference t and the update threshold t 0 of the two adjacent start updates, and decide whether to start the update:

When t>t 0 , the update is started;

When t ≤ t 0 , the update is rejected.