CN102902630B - A kind of method and apparatus accessing local file - Google Patents
A kind of method and apparatus accessing local file Download PDFInfo
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- CN102902630B CN102902630B CN201210301744.8A CN201210301744A CN102902630B CN 102902630 B CN102902630 B CN 102902630B CN 201210301744 A CN201210301744 A CN 201210301744A CN 102902630 B CN102902630 B CN 102902630B
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Abstract
The embodiment of the invention discloses a kind of method accessing local file, described method includes: obtain the access request to local file；Judge whether described local file has the cache file of correspondence in buffer area according to the described access request got, if judged result is otherwise to read described local file according to described access request；If judging, described local file has the cache file of correspondence in buffer area, then judge whether described cache file is the most more new state, if then reading described cache file according to described access request；If judging, described cache file is not the most more new state, then read described local file according to described access request.The invention also discloses a kind of device realizing accessing local file.Use the present invention, can realize reading high efficiency and the real-time of local file simultaneously.
Description
Technical field
The present invention relates to a kind of field of computer technology, particularly relate to a kind of method accessing local file and dress
Put.
Background technology
Existing computer system generally can be accelerated secondary by caching mechanism during accessing local file and visit
The speed asked, caches in buffer area when accessing local file, if same of back-call
During ground file, the most directly use the data in caching, and load document again need not be gone, accelerate browser and visit
Ask speed.The defect of existing caching mechanism is:
Memory cache cannot guarantee real-time update, such as figure in local disk when browser access
During sheet, this picture being had been carried out memory cache, image content is revised on local disk by we afterwards
Have updated, when at this moment browser second time visits again this picture, browser will directly use data cached, and
The image content of latest update cannot be shown；Or set the unified memory cache that do not uses, browser second time
When accessing same picture, the most again read this picture from local disk, be downloaded, the action such as decoding,
This can directly result in browser performance and decline.
Summary of the invention
The technical problem to be solved is, it is provided that a kind of method and apparatus accessing local file,
Can realize reading high efficiency and the real-time of local file simultaneously.
In order to solve above-mentioned technical problem, embodiments provide a kind of method accessing local file,
Described method includes:
Obtain the access request to local file；
Judge whether described local file has the slow of correspondence in buffer area according to the described access request got
Deposit file, if judged result is otherwise to read described local file according to described access request；
If judging, described local file has the cache file of correspondence in buffer area, then judge described local file
Whether having renewal relative to described cache file, if judging, described local file does not has relative to described cache file
Renewal is had then to read described cache file according to described access request；
If judging, described local file has renewal relative to described cache file, then read according to described access request
Take described local file.
Correspondingly, the embodiment of the present invention additionally provides a kind of device realizing accessing local file, described device
Including:
Access request acquisition module, for obtaining the access request to local file；
Caching judge module, sentences for the described access request got according to described access request acquisition module
Whether disconnected described local file has the cache file of correspondence in buffer area；
File updates judge module, for when described caching judge module obtains the judged result of affirmative, sentences
Whether disconnected described local file has renewal relative to described cache file；
When described file updates judge module, cache file read module, for judging that described local file is relative
When described cache file does not update, read described cache file according to described access request；
Local file read module, is used for when described caching judge module obtains the judged result of negative or institute
When stating the judged result that file renewal judge module obtains affirmative, read described this locality according to described access request
File.
Implement the present invention, have the advantages that by read local file cache file time first
Confirm and cache file described in real-time update, thus be simultaneously achieved the high efficiency reading local file with in real time
Property.
Accompanying drawing explanation
In order to be illustrated more clearly that the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, attached in describing below
Figure is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property work on the premise of, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that the present invention is for realizing accessing the device first embodiment structural representation of local file；
Fig. 2 is that the file renewal of the device for realizing access local file in first embodiment of the invention is sentenced
The structural representation of disconnected module；
Fig. 3 is the first embodiment schematic flow sheet that the present invention accesses the method for local file；
Fig. 4 is the cache management schematic flow sheet after reading local file in first embodiment of the invention；
Fig. 5 is to judge in first embodiment of the invention whether described local file has relative to described cache file
The idiographic flow schematic diagram updated.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Fig. 1 is that the present invention is for realizing accessing the device first embodiment structural representation of local file.This
The bright device realizing access local file can be implemented in such as computer, digital TV terminal, mobile terminal etc. and is
In system, can by browser in system to the data in storage medium such as text, picture file or
DTV carousel data etc. conducts interviews, and realizes the caching mechanism proposed in the present invention in internal memory.
The device being used in the present embodiment as shown in the figure realizing accessing local file at least may include that access request obtains
Delivery block 10, caching judge module 20, file update judge module 30, cache file read module 40 with
And local file read module 50, wherein:
Access request acquisition module 10 is for obtaining the access request to local file.Concrete, access request
Acquisition module 10 can obtain user by browser and ask the access of the local file in device storage medium
Asking, the local file in storage medium can be text, picture file or DTV carousel data etc.,
Described access request can include the protocol header of preset format and the file path of the local file of request, example
As: file: D KAWD331 1.JPG, dvb: 0631.MP4 etc..
Caching judge module 20 please for the described access got according to described access request acquisition module 10
Seek the cache file judging whether described local file has correspondence in buffer area.Concrete, in the present embodiment
Local file is to be associated with the cache file in buffer area by file path, and caching judge module 20 can
In buffer area, phase is searched with the file path according to the requested local file in the access request got
The cache file of association, described buffer area can be the internal memory cache region that device is built-in, it is also possible to for browser
The browser rs cache district set up in storage medium, if search less than; show that this is that browser accesses for the first time
This local file, does not the most cache it, and caching judge module 20 can trigger local file and read
Module 50 reads requested local file according to described access request.
File updates judge module 30 and is used for when described caching judge module 20 obtains the judged result of affirmative,
Judge whether described local file has renewal relative to described cache file.Concrete, when caching judge module
20 judged results obtaining affirmative show that requested local file has the cache file of correspondence in buffer area,
File updates judge module 30 and determines whether whether described local file has more relative to described cache file
Newly, if not updating, triggering cache file read module 40 and reading described caching literary composition according to described access request
Part, if local file has renewal relative to cache file, triggers local file read module 50 according to described visit
Requested local file is read in the request of asking.In the present embodiment, file renewal judge module 30 is permissible as shown in Figure 2
Farther include:
Modification time acquiring unit 301, for obtaining described local file respectively according to described access request
Rear modification time and last modification time corresponding to described cache file.Concrete, preserve in buffer area
File path and the local file of described cache file with local file can cached during described cache file
The final updating time of last update before carries out corresponding association and preserves, and described local file is at caching
The final updating time of front last update is i.e. as the last modification time that described cache file is corresponding.Repair
Change time in the past unit 301 can go to local file respectively in local storage medium, obtain described local literary composition
The last modification time of part, and in buffer area, obtain the last modification time that described cache file is corresponding.
Update judging unit 302, for the last modification time according to described local file and described caching literary composition
The last modification time that part is corresponding judges whether described local file has renewal relative to described cache file, if
The last modification time that the last modification time of described local file is corresponding with described cache file is identical, then sentence
Disconnected described local file does not update relative to described cache file, otherwise judge described local file relative to
Described cache file has renewal.Other judgment mode can be used in other embodiments to judge described this locality
Whether file has renewal relative to described cache file, such as can also be instant when local file is modified
The cache file triggered in buffer area is updated, if having completed buffer update, and labelling the most more new state, if
Outstanding updates then labelling the most more new state, file updates judge module 30 can be according to described in this marker for judgment
Whether local file has renewal relative to described cache file.
Optionally, the triggering mode that file updates judge module 30 concrete can be: file updates judge module
30 produce first code, by described when judging that described local file does not update relative to described cache file
First code sends extremely described cache file read module 40 and triggers described cache file read module 40 basis
Described access request reads cache file；When judging that described local file has renewal relative to described cache file
Time produce second code, described second code is sent to described local file read module 50 and triggers described
Ground file read module 50 reads local file according to described access request.Described first code can be one pre-
If code such as error code 304, described second code can be other error codes of non-304.
When described file updates judge module, cache file read module 40 is for judging that described local file is relative
When described cache file does not update, read described cache file according to described access request.Concrete,
Cache file read module 40 finds the slow of correspondence according to the file path in described access request in buffer area
Deposit file, browser and then the access of this cache file response user that can will read, and then browsing
Carry out on device resolving, typesetting, the operation such as render.
Local file read module 50 is used for when described caching judge module obtains the judged result of negative or institute
When stating the judged result that file renewal judge module obtains affirmative, read described this locality according to described access request
File.Concrete, local file read module 50 can be according to the file path in described access request at this
Ground storage medium reads described requested local file, browser and then the local literary composition that can will read
The access of part response user, and then carry out on a web browser resolving, typesetting, the operation such as render.And then it is local
File read module 50 can obtain the last amendment of described local file while reading described local file
Time.
Further, the device that being used in the present embodiment realizes accessing local file can also include:
Cache module 60, for being buffered in slow by the content of local file and the last modification time of local file
Deposit in district, respectively as the cache file of described local file corresponding with described cache file when finally revising
Between.The present embodiment can have read local file at local file read module 50 according to described access request
Cache module 60 can be by the content of described local file and finally repairing of described local file further afterwards
The time that changes associates with the file path of described local file and is saved in buffer area, respectively as described local literary composition
The cache file of part and last modification time corresponding to described cache file.In other embodiments, caching
Module 60 can be not limited only to after local file read module 50 reads local file according to access request
Perform above-mentioned cache management flow process, such as, according to user, the amendment of local file can also be operated triggering to this
The cache management flow process of local file.
Fig. 3 is the first embodiment schematic flow sheet that the present invention accesses the method for local file.The present invention accesses
The method of local file can be implemented in as in the computer systems such as computer, digital TV terminal, mobile terminal,
Can be by browser in system to the data in storage medium such as text, picture file or numeral electricity
Conduct interviews depending on carousel data etc., and in Installed System Memory, realize the caching mechanism proposed in the present invention.As
Method flow in the present embodiment shown in figure at least includes:
S301, obtains the access request to local file.In implementing, can be obtained by browser and use
The family access request to the local file in device storage medium, the local file in storage medium can be literary composition
Presents, picture file or DTV carousel data etc., described access request can include preset format
The file path of the local file of protocol header and request, such as: file: D KAWD331 1.JPG, dvb:
0631.MP4 etc..
According to the described access request got, S302, judges whether described local file has in buffer area right
The cache file answered.In implementing, in the present embodiment, local file is by file path and buffer area
Cache file be associated, browser can be according to the requested local literary composition in the access request got
The file path of part searches the cache file being associated in buffer area, and described buffer area can be that device is built-in
Internal memory cache region, it is also possible to the browser rs cache district set up in storage medium for browser, if finding
Corresponding cache file then triggers execution S303, if search less than; show that this is that browser accesses for the first time
This local file, does not the most cache it, then can trigger execution S305.
S303, it is judged that whether described local file has renewal relative to described cache file.In implementing,
Show that requested local file has the caching literary composition of correspondence in buffer area when S302 obtains the judged result of affirmative
Part, S303 determines whether described local file relative to whether the described cache file found has renewal,
If not updating, triggering and performing S304, if there being renewal, triggering and performing S305.Optionally, according to S303
Judged result trigger and read local file or the concrete triggering mode of cache file can be: described when judging
Producing first code relative to described cache file when local file does not update, browser is according to described first
Code triggers and reads cache file according to described access request；When judging that described local file is slow relative to described
Depositing when file has renewal and produce second code, browser triggers according to described second code please according to described access
Seek reading local file.Described first code can be a code such as error code 304 preset, described second
Code can be other error codes of non-304.
S304, reads described cache file according to described access request.In implementing, requested when judging
Local file do not update relative to the cache file in buffer area, then can read the caching of this correspondence
File, browser and then the access of this cache file response user that can will read, and then at browser
On carry out resolving, typesetting, the operation such as render.
S305, reads described local file according to described access request.In implementing, when S303 judges
Obtain requested local file and there is no the cache file of correspondence at buffer area, or when S304 judges described
Ground file has renewal relative to described cache file, then can exist according to the file path in described access request
Local storage medium reads described requested local file, browser and then this locality that can will read
The access of file response user, and then carry out on a web browser resolving, typesetting, the operation such as render.
Fig. 4 is the cache management schematic flow sheet after reading local file in first embodiment of the invention.Specifically
, after S304 reads described local file according to described access request, it is also possible to include local file
Cache management flow process, it should be pointed out that in other embodiments, the below cache management to local file
Flow process can be not limited only to occur after reading local file according to access request, it is also possible to according to user couple
The amendment operation of local file triggers the cache management flow process to this local file.As shown in the figure in the present embodiment
Cache management flow process include:
S401, obtains the content of described local file；
S402, obtains the last modification time of described local file；
S403, is buffered in caching by the content of described local file and the last modification time of described local file
Qu Zhong, as the last modification time that the cache file of described local file is corresponding with described cache file.This
In embodiment can by the last modification time of the content of described local file and described local file with described
Ground file file path association be saved in buffer area, respectively as described local file cache file with
And the last modification time that described cache file is corresponding.
Fig. 5 is to judge in first embodiment of the invention whether described local file has relative to described cache file
The idiographic flow schematic diagram updated.S303 in the present embodiment may include that further as shown in Figure 5
S501, obtains the last modification time of described local file and described respectively according to described access request
The last modification time that cache file is corresponding.Concrete, can be by when buffer area preserves described cache file
The last update before caching of described cache file and the file path of local file and local file
The final updating time carries out corresponding association and preserves, and last update is before caching for described local file
The rear renewal time is i.e. as the last modification time that described cache file is corresponding.Browser can go to this respectively
Ground file obtains the last modification time of described local file in local storage medium, and in buffer area
Obtain the last modification time that described cache file is corresponding.
S502, according to last modification time and corresponding finally the repairing of described cache file of described local file
The time of changing judges whether described local file has renewal relative to described cache file, if described local file
The last modification time that last modification time is corresponding with described cache file is identical, then perform S503 and judge described
Local file does not update relative to described cache file, otherwise performs S504 and judges that described local file is relative
Renewal is had in described cache file.Other judgment mode can be used in other embodiments to judge described
Whether ground file has renewal relative to described cache file, such as, trigger slow when local file is modified
The cache file deposited in district is updated, if completing to update, and labelling the most more new state, if outstanding updates
Then labelling the most more new state, follow-up can be according to local described in this marker for judgment when accessing same local file
Whether file has renewal relative to described cache file.
The embodiment of the present invention is by first confiring that when reading the cache file of local file and described in real-time update
Cache file, thus it is simultaneously achieved high efficiency and the real-time reading local file.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,
The hardware that can be by computer program instructions relevant completes, and described program can be stored in a computer
In read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.
Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory,
Or random store-memory body (Random Access Memory, RAM) etc. ROM).
Above disclosed be only present pre-ferred embodiments, certainly can not with this limit the present invention it
Interest field, the equivalent variations therefore made according to the claims in the present invention, still belong to the scope that the present invention is contained.
Claims (10)
1. the method accessing local file, it is characterised in that described method includes:
Obtaining the access request to local file, described access request includes the file path of described local file；
Judge whether described local file has in buffer area to be associated with the file path in described access request
Cache file, if judged result be otherwise according to described access request read described local file；
If judging that described local file has in buffer area to be associated with the file path in described access request
Cache file, then judge whether described local file has renewal relative to described cache file, if judging described
Local file does not update relative to described cache file and then reads described caching literary composition according to described access request
Part；
If judging, described local file has renewal relative to described cache file, then read according to described access request
Take described local file.
2. the method accessing local file as claimed in claim 1, it is characterised in that described in described basis
Access request also includes after reading described local file:
Obtain the content of described local file；
Obtain the last modification time of described local file；
The content of described local file and the last modification time of described local file are buffered in buffer area,
Respectively as the last modification time that the cache file of described local file is corresponding with described cache file.
3. the method accessing local file as claimed in claim 2, it is characterised in that described in described judgement
Whether local file has renewal to include relative to described cache file:
Last modification time and the described caching literary composition of described local file is obtained respectively according to described access request
The last modification time that part is corresponding；
If the last modification time phase that the last modification time of described local file is corresponding with described cache file
With, then judge that described local file has renewal relative to described cache file, otherwise judge described local file
Do not update relative to described cache file.
4. the method accessing local file as according to any one of claims 1 to 3, it is characterised in that
The last modification time of the described content by described local file and described local file is buffered in buffer area
In, the last modification time corresponding with described cache file as the cache file of described local file includes:
Last modification time corresponding with described cache file for described cache file is associated with described file path
Preserve.
5. the method accessing local file as according to any one of claims 1 to 3, it is characterised in that institute
State and judge described local file also includes after whether having renewal relative to described cache file:
When judging to produce first code when described local file does not update relative to described cache file, according to
Described first code triggers and reads cache file according to described access request；
When judging to produce second code, according to institute when described local file has renewal relative to described cache file
State second code to trigger according to described access request reading local file.
6. the device realizing accessing local file, it is characterised in that described device includes:
Access request acquisition module, for obtaining the access request to local file, described access request includes
The file path of described local file；
Caching judge module, is used for judging whether described local file has and described access request in buffer area
In the cache file that is associated of file path；
File updates judge module, for when described caching judge module obtains the judged result of affirmative, sentences
Whether disconnected described local file has renewal relative to described cache file；
When described file updates judge module, cache file read module, for judging that described local file is relative
When described cache file does not update, read described cache file according to described access request；
Local file read module, is used for when described caching judge module obtains the judged result of negative or institute
When stating the judged result that file renewal judge module obtains affirmative, read described this locality according to described access request
File.
7. the device realizing accessing local file as claimed in claim 6, it is characterised in that described device
Also include:
Cache module, for delaying the content of described local file and the last modification time of described local file
Exist in buffer area, respectively as last corresponding with described cache file of the cache file of described local file
Modification time.
8. the device realizing accessing local file as claimed in claim 7, it is characterised in that described file
Renewal judge module includes:
Modification time acquiring unit, for obtaining the last of described local file respectively according to described access request
Modification time and last modification time corresponding to described cache file；
Update judging unit, for the last modification time according to described local file and described cache file
Corresponding last modification time judges described cache file the most more new state, if described local file is
The last modification time that rear modification time is corresponding with described cache file is identical, then judge described local file phase
Described cache file is not updated, otherwise judges that described local file has more relative to described cache file
Newly.
9. realizing as according to any one of claim 6～8 accesses the device of local file, it is characterised in that
Described local file and last modification time thereof are buffered in buffer area, as institute by described cache module
The last modification time stating the cache file of local file corresponding with described cache file includes: cache module will
The last modification time that described cache file is corresponding with described cache file is associated protecting with described file path
Deposit.
10. realizing as according to any one of claim 6～8 accesses the device of local file, and its feature exists
In, described file updates judge module and is additionally operable to when judging that described local file does not has relative to described cache file
Produce first code when having renewal, described first code is sent extremely described cache file read module and triggers institute
State cache file read module and read cache file according to described access request；When judging described local file phase
Produce second code when having renewal for described cache file, described second code is sent to described local literary composition
Part read module triggers described local file read module and reads local file according to described access request.
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| CN201210301744.8A CN102902630B (en) | 2012-08-23 | 2012-08-23 | A kind of method and apparatus accessing local file |
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| EP3441876B1 (en) | 2016-04-27 | 2023-02-15 | Honor Device Co., Ltd. | Patch upgrade-based file processing method and device, terminal, and storage medium |
| CN106446097B (en) * | 2016-09-13 | 2020-02-07 | 苏州浪潮智能科技有限公司 | File reading method and system |
| CN110597452A (en) * | 2018-06-13 | 2019-12-20 | 中国移动通信有限公司研究院 | Data processing method and device of storage system, storage server and storage medium |
| CN111866419B (en) * | 2019-04-24 | 2022-05-31 | 杭州海康微影传感科技有限公司 | Thermal imaging image display method and device and thermal imaging equipment |
| CN112580059A (en) * | 2020-12-23 | 2021-03-30 | 北京宝兰德软件股份有限公司 | Anti-serialization vulnerability repairing method and device |
| CN114827129A (en) * | 2022-04-27 | 2022-07-29 | 济南浪潮数据技术有限公司 | File distribution method, device and medium |
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