CN101719073A - Intelligent client-based on-demand downloading realization method - Google Patents
Intelligent client-based on-demand downloading realization method Download PDFInfo
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Abstract
The invention provides an intelligent client-based on-demand downloading realization method, which aims to solve the problem on the updating of an intelligent client program in a low-speed network and update the program in a configurable mode in a way of taking a function as a unit. In the method, configurable and expandable downloading definition configuration is provided, and an application program can be flexibly configured according to actual conditions; the downloading and updating process of a client is completely automatic in no need of manual intervention; abnormity processing is enhanced in a deployment link, and specifically, the program is automatically updated when the downloading is started when an abnormity occurs; and downloaded items can be downloaded when in use, which reduces network traffic in a disguised form and reduces the range of the influences of a patch on the client.
Description
Technical field
The present invention relates to a kind of SmartClient (Smart Client) technical field of computer internet, particularly relate to a kind of method of client-side program synchronously renewing file of SmartClient application.
Background technology
SmartClient (Smart Client) technology is a kind of rich client technology based on internet (Internet).In client, adopt rich client (Rich Client) technology, can make full use of the local resource of client machine, for the user provides abundant user-interaction experience.With B/S (Browser/Server, browser/server) application program is compared, can represent to users' interfaces is that picture is installed in GUI (the Graphics User Interface on the local desktop system, graphic user interface) program interface, it has a lot of complicated interface interactive elements such as tree, menu, grid etc., friendly and interaction to the user strengthen greatly, can satisfy the various individual demands of user interface interaction, and powers such as local data cache, off-line application can be provided.And contrast with C/S (Client/Server, client/server) application program, the SmartClient technology provides the automatic deployment of client-side program to upgrade, and has avoided the various loaded down with trivial details and difficult of client-side program maintenance.
The SmartClient technology adopts network service (Web Service) the technical transmission data based on HTTP and XML, can be based on internet access, and the client and server end only transmits data necessary information, this with compare based on the transmission mode (data message mixes with interface formats information) of HTML during B/S uses, can effectively reduce the network data transmission data volume, reduce requirement the network bandwidth.
In sum, the SmartClient technology allows application program to issue and use the rich client program with a kind of as the simple mode of use Web on the internet.The SmartClient technology is fit to the management information system that the exploitation To enterprises are used very much, has had multiple main product to build based on the SmartClient technology in the business management software field at present.
In large enterprise's management software based on the SmartClient technology, need be bigger in the program file total amount of client deployment, may reach hundreds of million, in slow network (under the environment of transmission bandwidth＜1Mb), the delay that client downloads is upgraded is long, (under the transmission bandwidth＜100Kb), even cause system unavailable, had a strong impact on the availability of system at some relatively poor network condition.In addition, not isolated each other between the client-side program file, often a function can need a plurality of program files simultaneously, can produce direct or indirect dependence between the program file, if when dispose upgrading, can not correctly handle this program file dependence to each other, can cause program error and can't using system.The method of the client-side program synchronously renewing file that a kind of SmartClient that the present invention relates to is used is intended to solve the SmartClient program updates problem under the slow network, and is the renewal that unit carries out program with the function by configurable mode.
Summary of the invention
The invention provides a kind of implementation method of down loading updating of SmartClient program,
Method of the present invention realizes in the following manner, the download of define by downloading, issue being disposed, three parts of down loading updating realize SmartClient as required.
1. download definition
The download definition defines three parts by download items definition, download unit definition and self refresh download items and forms.
Download items is the description to physical file in the SmartClient program.Download unit is that the download items that the function in the SmartClient uses is described.
The configuration information of download items is finally stored with the XML form, and need be deployed under the designated directory, and it is come into force.
Need define the behavior of download items when the definition download items, the behavior of download items is meant that download items is downloaded to after the client, and the action of execution, these actions have registration GAC, Activex, COM+.
The configuration information of download unit is finally stored with the XML form, and need be deployed under the designated directory, and it is come into force.The download unit structure is as follows: as shown in Figure 2;
The minimum particle size that client is downloaded when down loading updating is a download items, and download items is downloaded to the version that client can write down download items afterwards.Other download unit is when downloading, because the download items client release is consistent with the service end version, download items need not be downloaded, and can be used under the situation about quoting by a plurality of download units in download items like this, only upgrades once.The structure of the version information of the download items of client records as shown in Figure 3.
After the download items that download unit comprises is updated, can note the version of carrier unit, client if consistent download unit does not just need to upgrade, has accelerated to detect the speed of upgrading carrying out to judge when upgrading whether download unit is consistent with the version of service end record in client like this.
Whether the self refresh download items has defined download items after download is finished, use the self refresh mode to dispose renewal, and the self refresh download items mainly comprises the download items of using in version detection assembly, download component, the deployment assembly.
2. issue is disposed
It is the process that generates download items version, download unit version information and download package that issue is disposed, and concrete step is as follows:
Step 2: the download items physical file of downloading definition in the definition is deployed in the system, generates the download items version information, the structure of version information is as follows.Version information adopts the MD5 Hash algorithm to generate, and benefit is that FileVersion is constant as long as political reform does not take place the content of file, and client just need not to upgrade.Be that with traditional benefit physical file not be used in revised file version in the frequent variation based on the FileVersion comparison, and content-based more reliable.Be illustrated in fig. 6 shown below, quoted download items in the download items version information.
3. down loading updating
The assembly that down loading updating comprises has version detection assembly, download component, deployment assembly, self refresh assembly four parts.
Down loading updating is as follows according to the step of flow performing:
At step 3: if occur failure in the downloading process, system provides prompting, confirms whether need to download again by the user, if select not withdraw from download the temporary file that generates in the deletion downloading process.
At step 6: if comprised the download items that self refresh assembly itself uses in the download items of downloading, need the deployment and the renewal of the assembly of execution self refresh earlier, start the self refresh assembly then.
Download unit version checking that step 1 is mentioned and the dual mode of download items version checking help improving the efficient that version is judged, the response time of program is provided.
Step 6 is mentioned, and refresh routine separates with the self refresh program, has guaranteed that the client All Files can both be updated.
The minimum particle size of client downloads is a download items.When different download units was used identical download items, client was only upgraded a download items and is got final product.
The minimum particle size of client downloads is a download items, as long as " download items " version unanimity, physical file does not just need to upgrade, and when different download units was used identical download items, client was only upgraded download items one time.
Download message defines flexibly by the mode of configuration, and according to " download unit " that SmartClient imports into, obtains " download items " physical file tabulation with the dependence of definite function.
Obtain the download items version of server record according to " download items " tabulation of obtaining, turn back to SmartClient, SmartClient compares according to the version information of " download items " version information that gets access to and active client record, filter out version inconsistent " download items ", and according to the download items file in download, at SmartClient record " download items " version.
According to file content obtain the MD5 hashed value and as the version of " download items ", the version of " download items " is the MD5 hashed value of file, as long as file content changes, SmartClient will file in download.
" download unit " dependence " download items ", " download unit " is Function Identification, " download items " is physical file.
" download items " is then more newly downloaded again in usefulness, in order to the download of dispersed intelligence client file.
Method of the present invention compared with prior art has the following advantages:
Configurable and extendible download definition configuration is provided, and application program can be according to the actual conditions flexible configuration.The down loading updating process full automation of client need not manual intervention.Dispose in the link and strengthened abnormity processing, after generation was unusual, program was being downloaded when starting and can upgraded automatically.Download items can be downloaded in use, covert reduction the flow of network, reduced the coverage of new patch to client.Adopt MD5 Hash algorithm spanned file version, as long as file content does not change, file just can not be updated download.Physical file is downloaded to after the client, can the act of execution mode, be registered as GAC object, Activex object, COM+.The mechanism that adopts dual judgement is judged in the renewal of download unit, has submitted the renewal verification efficiency to.The granularity of client downloads is a download items, as long as download items version unanimity, physical file does not just need to upgrade.
Description of drawings
Fig. 1 is the structural drawing of download items:
Fig. 2 is the download unit structural drawing;
Fig. 3 is the structural drawing of version information of the download items of client records;
Fig. 4 is the structural drawing of version information of the download unit of client records:
Fig. 5 self refresh download items structural drawing;
Fig. 6 is the download items version information;
Fig. 7 is the download unit version information;
Fig. 8 is a graph of a relation of downloading download items and download unit in the definition;
Fig. 9 is the graph of a relation of download items version and download items, download unit version and download unit;
Figure 10 is the process flow diagram of down loading updating.
Embodiment
Followingly the preferred embodiments of the present invention are done following detailed description the in detail, make above-mentioned target of the present invention, feature and advantage more clear, understandable with reference to accompanying drawing.
In order to be more readily understood the embodiment of this method, be described in detail with example.
Example:
Scene: system definition three functions, function A, function B, function C, the corresponding relation of the file of function and use is as follows, wherein file A.dll need register GAC in client.
A.Dll function A, function C
B.Dll function B, function C
Step 1:
1. define download items configuration file, DownloadItem_Test.xml; File structure is as follows:
<GSPDownloadFileInfo>
<ID>A.dll</ID>
<ServerPath/>
<ClientPath/>
<FileName>A.dll</FileName>
<DownloadFileName>A.zip</DownloadFileName>
<ActionModes>
<Modes>GAC</Modes>
</ActionModes>
</GSPDownloadFileInfo>
<GSPDownloadFileInfo>
<ID>B.dll</ID>
<ServerPath/>
<ClientPath/>
<FileName>B.dll</FileName>
<DownloadFileName>B.zip</DownloadFileName>
<ActionModes>
<Modes>None</Modes>
</ActionModes>
</GSPDownloadFileInfo>
Download items A, B have been defined.
2. define download unit configuration file, DownloadUnit_Test.Xml
<GSPDownloadUnit>
<ID>SYS0102</ID>
<Code>SYS0102</Code>
＜Name〉function A＜/Name 〉
<DownLoadItems>
<string>A.dll</string>
</DownLoadItems>
</GSPDownloadUnit>
<GSPDownloadUnit>
<ID>SYS0103</ID>
<Code>SYS0103</Code>
＜Name〉function B＜/Name 〉
<DownLoadItems>
<string>B.dll</string>
</DownLoadItems>
</GSPDownloadUnit>
<GSPDownloadUnit>
<ID>SYS0104</ID>
<Code>SYS0104</Code>
＜Name〉function C＜/Name 〉
<DownLoadItems>
<string>A.dll</string>
<string>B.dll</string>
</DownLoadItems>
</GSPDownloadUnit>
Three download unit SYS0102, SYS0103, SYS0104 have been defined.Wherein SYS0102 relies on download items A.dll; SYS0103 relies on download items B.dll; SYS0104 relies on download items A.dll, B.dll.The download items, the download unit configuration file that define are deployed to the server assigned catalogue.
Step 2:
3. dispose download items A.dll, B.dll, generate download items version and download unit version information, and generate download package: A.zip, B.zip at server end.
Step 3:
4. after the client login system, click function function A carries out the down loading updating of SYS0102, SmartClient is downloaded to application server request SYS0102 download unit, application server returns A.dll download items version information, client judges that download items does not exist or version is inconsistent, carry out the download of A.dll, and the download unit version information of record A.dll download items version information and function A is in temporary file.
5.A.dll after download items is downloaded and finished, use the zip standard format to unpack download package, and the file storage after unpacking arrived temp directory.
6. judge whether A.dll needs to start self refresh, judged result is for denying.Carry out the anti-behavior act of A.dll, promptly unload GAC, then behavior act registration GAC.
7. write down the version information of A.dll download items, the version information of function A, and empty temporary version information, carry out calling of function A.
8. client continues click function B, carry out the download of download unit SYS0103, SmartClient is downloaded to application server request SYS0103 download unit, application server returns B.dll download items version information, client judges that download items does not exist or version is inconsistent, carries out the download of B.dll.Remaining step and 5,
9. identical with 6,7.
10. client continues click function C, carry out the download of download unit SYS0104, SmartClient is downloaded to application server request SYS0104 download unit, application server returns A.dll and B.dll download items version information, client judges that download items has existed and the version unanimity, do not need to download, directly carry out calling of function.
11. at what mention in 6: if judge that result that whether A.dll need to start self refresh for being, then withdraws from current application program, and starts the self refresh process.The self refresh program is carried out unpacking of A.zip, and searches more new route according to the download items version information of record, carries out the anti-behavior act unloading GAC of history file, carries out the behavior act registration GAC of A.dll again.
12. the download items version information of record A.dll and the download unit version information of function A, and A.dll download items version information that writes down in the deletion temporary file and the download unit version information of function A.
13. restart master routine, carry out calling of function.
In sum, by configurable and extendible download definition configuration is provided, make that application program can be according to the actual conditions flexible configuration.The down loading updating process full automation of client need not manual intervention.Dispose in the link and strengthened abnormity processing, after generation was unusual, program also can be upgraded when downloading startup automatically.Download items can be downloaded in use again, has reduced the flow of network, has reduced the coverage of new patch to client.Adopt MD5 Hash algorithm spanned file version, as long as file content does not change, file just can not be updated download.Physical file is downloaded to after the client, can the act of execution mode, be registered as GAC object, Activex object, COM+ etc.The mechanism that adopts dual judgement is judged in the renewal of download unit, has submitted the renewal verification efficiency to.The granularity of client downloads is a download items, as long as download items version unanimity, physical file does not just need to upgrade.
Claims (7)
1. the download implementation method as required based on SmartClient is characterized in that, the download of define by downloading, issue being disposed, three parts of down loading updating realize SmartClient as required; Concrete steps are as follows:
1) downloads definition
The download definition defines three parts by download items definition, download unit definition and self refresh download items and forms;
Download items is the description to physical file in the SmartClient program, and download unit is that the download items that the function in the SmartClient uses is described, and the structure of download items is as follows:
The configuration information of download items is finally stored with the XML form, and need be deployed under the designated directory, and it is come into force;
Need define the behavior of download items when the definition download items, the behavior of download items is meant that download items is downloaded to after the client, and the action of execution, these actions have registration GAC, Activex, COM+;
The configuration information of download unit is finally stored with the XML form, and need be deployed under the designated directory, and it is come into force;
Client is when down loading updating, the minimum particle size of downloading is a download items, download items is downloaded to the version that client can write down download items afterwards, other download unit is when downloading, because the download items client release is consistent with the service end version, download items need not be downloaded, and is used under the situation about quoting by a plurality of download units in download items, only upgrades once;
After the download items that download unit comprises is updated, can note the version of carrier unit, client if consistent download unit does not just need to upgrade, has accelerated to detect the speed of upgrading carrying out to judge when upgrading whether download unit is consistent with the version of service end record in client like this;
The self refresh download items has defined download items after download is finished, and uses the self refresh mode to dispose renewal, and the self refresh download items mainly comprises the download items of using in version detection assembly, download component, the deployment assembly;
2) issue is disposed
It is the process that generates download items version, download unit version information and download package that issue is disposed, and concrete step is as follows:
(1) is deployed to the service end assigned catalogue downloading the download items, the download unit configuration file that define in the definition, it is come into force;
(2) the download items physical file of downloading definition in the definition is deployed in the system, generates the download items version information, version information adopts the MD5 Hash algorithm to generate, and political reform does not take place the content of file, and FileVersion is constant, and client need not to upgrade;
(3) use the compression algorithm of standard to compress the physical file of download items appointment according to " file name during download " of download items configuration, form download package, after physical file was compressed, client can effectively reduce download when downloading physical file;
(4) download package of duplicating compression is under the http path that client-access arrives, for client downloads;
(5) in the download unit configuration file, search the download unit of this download items of all references, and be download unit generation version information;
3) down loading updating
The assembly that down loading updating comprises has version detection assembly, download component, deployment assembly, self refresh assembly four parts;
Step 1: use the version detection component detection to upgrade, client is searched the version of client downloads unit by download unit ID, and with the download unit version of service end record relatively, unanimity then is not returned as and downloads, inconsistent, obtain the download items version information that all download units are quoted from server, and with the download items version information of client stores relatively, there is not download items in inconsistent or client, then writing down this download items needs to download, return download unit version information and the download items version list that needs to download at last, judge the download unit version earlier and adopt the checking of download unit version and the double verification mode of download items version checking, help improving the efficient that version is judged, shorten the response time of program;
Step 2: the result according to the version detection assembly returns, for then illustrating, sky do not need to upgrade, return download unit version and download items version list information, then enable the download that download component is carried out download items;
Step 3: start download component and carry out download, adopt the http request mode to download the file in download that defines in the download items during download, after single download items is downloaded and is finished, can be in the download items version cache client temporary file, treat all download items all be downloaded finish after, note the carrier unit version in the client temporary file; Occur failure in the downloading process, system provides prompting, confirms whether need to download again by the user, selects not withdraw from download the temporary file that generates in the deletion downloading process; After download items was successfully downloaded, the function of record download items version helped continuing the renewal of execute file when mistake appears in program, has strengthened the robustness of program;
Step 4: judge whether the download items of downloading is present in the tabulation of self refresh download items, does not exist, and then enables the deployment assembly, exists, and then enables the self refresh assembly;
Step 5: start and dispose assembly, after download component is finished, use the compression algorithm of standard to unpack as download package, after unpacking, the name of file is according to the file name name that defines in the download items, the file storage that unpacks is in temp directory, treat all download package unpack finish after, interim download items version according to client records finds more new route and the behavior pattern of download items in client temporarily, there is behavior pattern, need to carry out earlier the anti-behavior pattern of history file, the behavior pattern of new file is carried out in the covering of execute file more at last; After download items is disposed and is upgraded successfully, deletion is at the interim download items version information of client, and record in the client downloads item version information, when all download items all upgrade finish after, note the carrier unit version information in client downloads unit version, and the interim download unit version information of deletion client; Mistake appears in the deployment, system can point out re-launching applications to attempt carrying out and dispose, application program can judge at first when restarting whether the interim download items version information in the interim download unit version information of client and client is empty, be not empty, start and dispose assembly, the deployment of execute file; The function of download package compression helps reducing the import amount of file at network, has strengthened the adaptive faculty of program under low bandwidth;
Step 6: start the self refresh assembly, after download component is finished, use the compression algorithm of standard to unpack as download package, after unpacking, the name of file is according to the file name name that defines in the download items, when the download items of downloading is in the tabulation of self refresh download items, start the self refresh assembly, when starting the self refresh assembly, need close the host process of current download, and start new process execution self refresh, and the procedure set at the place of self refresh to keep independent, can not with the version checking assembly, download component, dispose assembly and have direct adduction relationship, the update mode of file is identical with step 5; Comprised the download items that self refresh assembly itself uses in the download items of downloading, need to carry out earlier the deployment and the renewal of self refresh assembly, start the self refresh assembly then, refresh routine separates with the self refresh program, can guarantee that the client All Files can both be updated.
2. method according to claim 1 is characterized in that the minimum particle size of client downloads is a download items, " as long as download items " version unanimity, physical file does not just need to upgrade, and when different download units was used identical download items, client was only upgraded download items one time.
3. method according to claim 1 is characterized in that, download message defines flexibly by the mode of configuration, and according to " download unit " that SmartClient imports into, obtains " download items " physical file tabulation with the dependence of definite function.
4. method according to claim 1, it is characterized in that, obtain the download items version of server record according to " download items " tabulation of obtaining, turn back to SmartClient, SmartClient compares according to the version information of " download items " version information that gets access to and active client record, filter out version inconsistent " download items ", and according to the download items file in download, at SmartClient record " download items " version.
5. method according to claim 1, it is characterized in that according to file content obtain the MD5 hashed value and as the version of " download items ", the version of " download items " is the MD5 hashed value of file, as long as file content changes, SmartClient will file in download.
6. according to the method for claim 1, it is characterized in that, " download unit " dependence " download items ", " download unit " is Function Identification, " download items " is physical file.
7. according to the method for claim 1, it is characterized in that " download items " is with then more newly downloaded again, in order to the download of dispersed intelligence client file.
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