CN101917474A - Method, system and device for downloading file - Google Patents
Method, system and device for downloading file Download PDFInfo
- Publication number
- CN101917474A CN101917474A CN2010102537041A CN201010253704A CN101917474A CN 101917474 A CN101917474 A CN 101917474A CN 2010102537041 A CN2010102537041 A CN 2010102537041A CN 201010253704 A CN201010253704 A CN 201010253704A CN 101917474 A CN101917474 A CN 101917474A
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- file
- downloaded
- hash
- fat
- described file
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
Abstract
The invention discloses a method, a system and a device for downloading a file. The downloading method comprises the following steps of: acquiring useless data in the file to be downloaded; removing the useless data in the file to be downloaded, and compressing the file to be downloaded; and downloading the compressed file to be downloaded to a memory of terminal equipment. Thus, according to the invention, it is possible to improve the efficiency of file transmission, save costs of production and after-sale service, and prolong the service life of the memory of the terminal equipment.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method for down loading, system and device of file.
Background technology
Because multimedia services such as picture, audio frequency and video need be provided, the required memory space of terminal equipment is increasing, and at present, terminal equipment manufacturer extensively adopts 2Gb even more jumbo NandFlash memory.
In actual applications, in order to reserve sufficient system file and user file memory space to terminal equipment, terminal equipment manufacturer can plan bigger file system area when making the terminal software version, thereby causes terminal software version capacity to increase.And researching and developing, producing and waiting after sale in each link, when the terminal software version is carried out download and upgrade,, influence cost, time and the benefit of terminal equipment manufacturer because the increase of terminal software version capacity causes the time of download terminal software version to increase.
The terminal software version generally is that terminal equipment and computer are carried out physical connection, by USB port with transfer of data in terminal equipment.At present, when the terminal software version was downloaded to terminal equipment, computer directly broke into packet with whole version file and is transferred to terminal equipment by USB port.Adopt this mode to download, because the file system area of terminal software version is excessive, the file available capacity that is built in the file system may be seldom (for example, the file system that has has only just made up some bibliographic structures, there is no root and subdirectory file), when transmitting useful file, also transmitted the hash that much is used to fill the file system capacity simultaneously, reduce efficiency of transmission, increased the time that the terminal software version is downloaded.In addition, the hash in the file system has also write in the memory of terminal equipment, and memory has been carried out unnecessary operation bidirectional, has shortened the useful life of the memory of terminal equipment.
Summary of the invention
Main purpose of the present invention is to provide a kind of method for down loading, system and device of file, one of to solve the above problems at least.
According to an aspect of the present invention, provide a kind of method for down loading of file, having comprised: obtained the hash in the file to be downloaded; Remove this hash in the file to be downloaded, the compression file to be downloaded; File to be downloaded after the compression is downloaded in the memory of terminal equipment.
According to a further aspect in the invention, provide a kind of download system of file, having comprised: main frame, be used for removing the hash of file to be downloaded, the file to be downloaded after this hash is removed in compression, and the file to be downloaded after will compressing downloads to terminal equipment; Terminal equipment is connected with main frame by communication interface, is used to receive the file to be downloaded after the compression of main frame transmission, and the file to be downloaded that receives is write in the memory of terminal equipment.
According to a further aspect of the invention, provide a kind of main frame, having comprised: acquisition module is used for obtaining the hash of file to be downloaded; Compression module is used for removing this hash of file to be downloaded, the compression file to be downloaded; Sending module is used for the file to be downloaded of compressed module compression is sent to terminal equipment.
By the present invention, main frame is when downloading file to be downloaded to terminal equipment, remove the hash in the file to be downloaded, compress file to be downloaded then, be transferred to terminal equipment again, thereby can shorten the time of file transfer and the time that data write terminal equipment, reduced the write operation of unnecessary data, and then improved the efficient of file transfer, and saved production and after-sale service cost, prolonged the life-span of the memory of terminal equipment.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the download system of the file of the embodiment of the invention;
Fig. 2 is the structural representation according to the main frame of the embodiment of the invention;
Fig. 3 is the structural representation of main frame according to the preferred embodiment of the invention;
Fig. 4 is the structural representation of the enquiry module of the main frame of another preferred embodiment according to the present invention;
Fig. 5 is the flow chart according to the method for down loading of the file of the embodiment of the invention;
Fig. 6 is the structural representation of FAT file system;
Fig. 7 is the flow chart of the method for down loading of file according to the preferred embodiment of the invention;
Fig. 8 is the corresponding relation schematic diagram of list item and user data area bunch number in the FAT table.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 1 is the structural representation according to the download system of the file of the embodiment of the invention, and this download system comprises: main frame 2 and terminal equipment 4.Wherein, main frame 2 is used for removing the hash of file to be downloaded, and the file to be downloaded after the hash is removed in compression, and the file to be downloaded after will compressing downloads to terminal equipment 4; Terminal equipment 4 is connected with main frame 2 by communication interface (for example, USB interface), is used to receive the above-mentioned file to be downloaded after the compression of main frame 2 transmission, and the data that receive are write in its memory.
In actual applications, main frame 2 can be judged the file format of file to be downloaded, according to the file format of file to be downloaded, resolve file to be downloaded, obtain hash in the file to be downloaded, for example, be used to fill the data of file system capacitive structure, remove this part hash in the original file to be downloaded then, again file to be downloaded is effectively compressed, rebuild new file to be downloaded, the file to be downloaded that rebuilds is sent to terminal equipment 4.
For example, with file allocation table (File Allocation Table, abbreviating FAT as) file system files is example, main frame 2 can read the FAT table that is used for disk file index and location in the FAT file system, from the FAT table, obtain contents in table and indicate unappropriated list item, thereby determine bunch unoccupied with this list item corresponding user data district, and then determine that the data from the initial address of this bunch to the area stores of FAT file system tail are hash, this part hash is removed, on the basis that keeps FAT file system basic structure, original FAT file data district occupation space is effectively compressed, thereby dwindle the volume of FAT file system, rebuild new file to be downloaded, and this file to be downloaded is sent to terminal equipment 4.
The download system of the above-mentioned file by the embodiment of the invention, main frame 2 can be before being downloaded to terminal equipment 4 with file, remove the hash in this document, and file effectively compressed, thereby can improve the efficiency of transmission of file, minimizing has prolonged the life-span of memory to the unnecessary data write operation of the memory of terminal equipment 4, has saved production and after-sale service cost.
Fig. 2 is the structural representation according to the main frame 2 of the embodiment of the invention, and as shown in Figure 2, main frame 2 can comprise: acquisition module 20, compression module 22 and sending module 24.Wherein, acquisition module 20 is used for obtaining the hash of file to be downloaded; Compression module 22 is used for removing the hash of file to be downloaded, the compression file to be downloaded; Sending module 24 is used for the file to be downloaded of compressed module 22 compressions is sent to terminal equipment 4.
Preferably, acquisition module 20 can obtain hash in the file to be downloaded by the file format of analyzing file to be downloaded, Fig. 3 is the structural representation of main frame 2 according to the preferred embodiment of the invention, as shown in Figure 3, in the preferred embodiment, acquisition module 20 can comprise: judge module 200 and enquiry module 202.Wherein, judge module 200 is used to judge the file format type of file to be downloaded, for example, judges that file to be downloaded is the file of FAT file system files, new technology file system file or other Format Type; Enquiry module 202, be used for file format type according to file to be downloaded, hash in the inquiry file to be downloaded, for example, for the FAT file system files, its hash comprises the hash of filling the file system capacitive structure, and enquiry module 202 can inquire hash wherein according to the structure of FAT file system files.
In another preferred embodiment of the present invention, is example with the file to be downloaded for the FAT file system files, Fig. 4 is the structural representation of the enquiry module 202 of main frame 2 in the preferred embodiment, as shown in Figure 4, in the preferred embodiment, enquiry module 202 can comprise: first determines submodule 2020, is used for determining the FAT file system type of file to be downloaded, for example, determine that file to be downloaded is FAT12 type, FAT16 type or FAT32 type etc.; Reading submodule 2022, be used for FAT file system type according to file to be downloaded, read the FAT table of file to be downloaded, for different FAT file system types, the address of FAT table sector, place may be different with the size of FAT table, according to the FAT file system type that first definite submodule 2020 is determined, reading submodule 2022 can be determined the address and the FAT table size of FAT table sector, place, thereby reads the FAT table of file to be downloaded; Obtain submodule 2024, be used for according to this FAT table, obtain in the user data area of file to be downloaded vacant bunch initial address, in actual applications, put down in writing the situation that user data area has taken bunch in the FAT table, number there is certain corresponding relation in the family that its table record item is list item value and data field, obtain submodule 2024 by traversal FAT table, can obtain the indication of its contents in table does not take bunch (for example, value is 0) list item, thereby determine that corresponding with this list item bunch is vacant bunch, and then obtain the initial address of this bunch; Second determines that submodule 2026 is used for the initial address according to vacant bunch, determines that the data of the area stores of the end address from this initial address to file to be downloaded are hash.
If file to be downloaded is the FAT file system files, then compression module 22 is when the compression file to be downloaded, the basic structure that keeps its FAT file system, reduce the hash in the user data area, original file to be downloaded is effectively compressed in the user data area occupation space, dwindle the volume of FAT file system, rebuild new file to be downloaded.Thereby can realize effective compression of FAT file system files, reduce the time that the FAT file system files is downloaded transmission.
Fig. 5 is the flow chart according to the method for down loading of the file of the embodiment of the invention, and as shown in Figure 5, this method mainly may further comprise the steps:
Step S502, main frame 2 obtains the hash in the file to be downloaded;
For example, main frame 2 can be analyzed file to be downloaded by judging the file format type of file to be downloaded, the hash in the inquiry file to be downloaded.
Step S504, the hash that main frame 2 is removed in the file to be downloaded is compressed this file to be downloaded;
For example, main frame 2 can keep the basic structure of this file to be downloaded according to the file format type of file to be downloaded, reduces hash wherein, the file to be downloaded occupation space is effectively compressed again, and rebuilds new file to be downloaded.
Step S506, the file to be downloaded after main frame 2 will compress downloads in the memory of terminal equipment 4.
For example, main frame 2 can be wiped the memory of terminal equipment 4, and the file to be downloaded after will compressing then is written in the memory of terminal equipment 4.
The said method that provides by the embodiment of the invention, main frame 2 is before downloading files into terminal equipment 4, treating downloaded files earlier compresses, reduce hash wherein, thereby reduced the time of transfer of data, improve the efficient of transfer of data, avoided the memory of terminal equipment 4 is carried out the write operation of unnecessary data, prolonged the life-span of the memory of terminal equipment 4.
Be example with FAT file system structure shown in Figure 6 below, the technical scheme that the embodiment of the invention is provided describes.
As shown in Figure 6, the FAT file system structure comprises leader record district (Dos BootRecord abbreviates DBR as) 601, FAT district 602, root 603 and user data area 604.Wherein, DBR district and FAT district are the unit visit with the sector; Root is visited with the sector in FAT12 and FAT16 system, and root is bunch to be the unit visit in the FAT32 system; User data area 604 is bunch to be the unit visit.
Comprise DBR 6011 and residue reserve sector 6012 in the DBR district 601, DBR6011 is arranged in the 0th sector of FAT file system usually, and residue reserve sector 6012 space sizes are 0.Stored the guidance information that disk operating starts among the DBR 6011.Usually each sector-size is 512 bytes.
The FAT district comprises FAT16021 and FAT26022, and FAT26022 is the duplicate copy of FAT16011 usually, and the FAT table is for being used for a kind of chain structure that disk file index and location cause.
Root 603 has been stored the information such as root title in the disk.
User data area 604 has been stored subdirectory title and concrete file data, and its storage mode is bunch to be unit, and common bunch is the integral multiple of sector.
Fig. 7 is the flow chart according to the method for down loading of the FAT file system files of the embodiment of the invention, and as shown in Figure 7, the FAT file system files downloads to terminal equipment 4 from main frame 2 and mainly may further comprise the steps:
Step 701: terminal equipment 4 is connected on the USB port of main frame 2, sets up physical connection with main frame 2;
Step 702: the access of terminal equipment 4 on the main frame 2 detecting real-time USB port, control terminal 4 enters downloading mode, and the Flash driving is read among the RAM of terminal equipment 4, and operation Flash driver is set up data with driving and is connected;
Step 703: main frame 2 is resolved terminal document to be downloaded and whether is satisfied the FAT file system type, if satisfy, then execution in step 704; Otherwise, execution in step 708.
Particularly, main frame 2 can be preceding 512 bytes (being the 0th sector of FAT file system) that read file to be downloaded, be the leader record DBR 6011 of FAT file system, relativity shift DBR 6011 the 0th byte content is represented jump instruction, and 2 byte content that relativity shift 0x01FE begins are represented the effective end mark of DBR.If jump instruction is 0xEB or 0xE9, and effective end mark of DBR is 0x55AA, satisfies this condition, illustrates that then this terminal document is the FAT file system files.
Step 704: main frame 2 is determined the FAT file system type;
Wherein, comprise a data structure-basic input parameters district (BiosParameter Block among the DBR 6011, abbreviate BPB as), it has write down FAT file system structure essential information, for example, FAT file system sector sum, FAT table size and information such as number and reserve sector size, by these information, can calculate FAT table place sevtor address, the sum of user data area bunch, according to the size of user data area bunch, can determine the type of file system.
If the number of document cluster is less than 4085, then this document is the FAT12 type; If the number of document cluster is more than or equal to 4085, and less than 65525, then this document is the FAT16 type; If the number of document cluster is more than or equal to 65525, then this document is the FAT32 type.
Step 705: according to FAT1 6021 place sevtor address and FAT table size, obtain FAT1 6021 data, data in the FAT table are read in the internal memory;
Step 706: the initial address of obtaining vacant bunch of the user data area of FAT file system files;
Write down the situation that the user area has taken bunch in the FAT table, its table record item is the corresponding relation that bunch number exists of list item value and user data area, Fig. 8 for list item in the FAT table and user data area bunch number the schematic diagram of corresponding relation, wherein, the mapping relations between bunches numbers 802 of the list item 801 of FAT table and user data area are: user data area bunch number=list item-2 of FAT table.If user data area is bunch occupied, then corresponding contents in table is not 0.For FAT16, FAT32 type file system, a end of file bunch pairing contents in table is 0xFFFF; For FAT12 type file system, a end of file bunch pairing contents in table is 0x0FFF.
Step 707: compress FAT file system files to be downloaded;
The initial address that the user data area of main frame 2 definite FAT file system files is vacant bunch to the data of the area stores of FAT file system tail are hash.Then main frame 2 keeps FAT file system basic structure, promptly keep the useful data in DBR district, FAT district, root and the user data area, reduce the hash in the user data area, original FAT file data district taken up room effectively compress, dwindle FAT file system volume, rebuild file to be downloaded.
Step 708: main frame 2 is wiped the Flash of terminal equipment 4, and file to be downloaded is write among the terminal equipment Flash;
Step 709: restart terminal equipment, determine to download successfully.
Need to prove, though the foregoing description is that example describes with the FAT file system files, but be not limited to this, file for other Format Type, as long as main frame 2 can determine the hash of this document by analyzing its file format type, then can adopt with FAT file system files similar methods file in download to terminal equipment 4.
From above description, in embodiments of the present invention, compress by treating the file that downloads to terminal equipment, remove the hash in this document, shortened the time of file transfer and file write memory, improve file downloading speed, saved production, after service cost, prolonged the life-span of memory simultaneously.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the method for down loading of a file is characterized in that, comprising:
Obtain the hash in the file to be downloaded;
Remove the described hash in the described file to be downloaded, compress described file to be downloaded;
Described file to be downloaded after the compression is downloaded in the memory of terminal equipment.
2. method according to claim 1 is characterized in that, the hash of obtaining in the file to be downloaded comprises:
Judge the file format type of described file to be downloaded;
According to described file type, inquire about the described hash in the described file to be downloaded.
3. method according to claim 2 is characterized in that, described file to be downloaded is a file allocation table FAT file system files.
4. method according to claim 3 is characterized in that, according to described file type, the described hash of inquiring about in the described file to be downloaded comprises:
Determine the FAT file system type of described file to be downloaded;
According to the FAT file system type of described file to be downloaded, read the FAT table of described file to be downloaded;
According to described FAT table, obtain in the user data area of described file to be downloaded vacant bunch initial address;
The data of determining the area stores of the end address from described initial address to described file to be downloaded are described hash.
5. method according to claim 4 is characterized in that, the initial address of obtaining in the user data area of described file to be downloaded vacant bunch comprises:
Travel through described FAT table, obtain its contents in table and indicate unappropriated list item;
Obtain the described user data area corresponding with described list item bunch, determine described bunch for vacant bunch;
Obtain described vacant bunch initial address.
6. method according to claim 3 is characterized in that, removes the described hash in the described file to be downloaded, and the remaining data that compresses described file to be downloaded comprises:
Keep the FAT file system basic structure of described file to be downloaded, reduce the described hash in the described file to be downloaded, described file to be downloaded occupation space is compressed.
7. the download system of a file is characterized in that, comprising:
Main frame is used for removing the hash of file to be downloaded, and the file to be downloaded after the described hash is removed in compression, and the described file to be downloaded after will compressing downloads to terminal equipment;
Described terminal equipment is connected with described main frame by communication interface, be used to receive the described file to be downloaded after the compression of described main frame transmission, and the described file to be downloaded that will receive writes in the memory of described terminal equipment.
8. system according to claim 7 is characterized in that, described main frame comprises:
Acquisition module is used for obtaining the hash of described file to be downloaded;
Compression module is used for removing the described hash of described file to be downloaded, compresses described file to be downloaded;
Sending module is used for the described file to be downloaded through described compression module compression is sent to described terminal equipment.
9. system according to claim 8 is characterized in that, described acquisition module comprises:
Judge module is used to judge the file format type of described file to be downloaded;
Enquiry module is used for the file format type according to described file to be downloaded, inquires about the described hash in the described file to be downloaded.
10. system according to claim 9 is characterized in that, described file to be downloaded is the FAT file system files; Described enquiry module comprises:
First determines submodule, is used for determining the FAT file system type of described file to be downloaded;
Reading submodule is used for the FAT file system type according to described file to be downloaded, reads the FAT table of described file to be downloaded;
Obtain submodule, be used for table, obtain in the user data area of described file to be downloaded vacant bunch initial address according to described FAT;
Second determines submodule, is used for according to described initial address, determines that the data of the area stores of the end address from described initial address to described file to be downloaded are described hash.
11. a main frame is characterized in that, comprising:
Acquisition module is used for obtaining the hash of file to be downloaded;
Compression module is used for removing the described hash of described file to be downloaded, compresses described file to be downloaded;
Sending module is used for the described file to be downloaded through described compression module compression is sent to terminal equipment.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN201010253704.1A CN101917474B (en) | 2010-08-12 | 2010-08-12 | The method for down loading of file, system and device |
PCT/CN2010/078678 WO2012019388A1 (en) | 2010-08-12 | 2010-11-12 | Method, system and device for file download |
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CN201010253704.1A CN101917474B (en) | 2010-08-12 | 2010-08-12 | The method for down loading of file, system and device |
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CN101917474A true CN101917474A (en) | 2010-12-15 |
CN101917474B CN101917474B (en) | 2015-08-12 |
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CN201010253704.1A Expired - Fee Related CN101917474B (en) | 2010-08-12 | 2010-08-12 | The method for down loading of file, system and device |
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CN105224698A (en) * | 2015-11-17 | 2016-01-06 | 盛趣信息技术(上海)有限公司 | Picture-storage system and method |
CN105224386A (en) * | 2015-09-06 | 2016-01-06 | 浪潮(北京)电子信息产业有限公司 | A kind of method and device improving virtual machine template transfer efficiency |
CN107168962A (en) * | 2016-03-07 | 2017-09-15 | 深圳市中兴微电子技术有限公司 | A kind of document handling method, client and user equipment |
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CN101876948A (en) * | 2009-04-30 | 2010-11-03 | 国际商业机器公司 | Method and device for supporting discontinuous access of data in local memory |
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- 2010-11-12 WO PCT/CN2010/078678 patent/WO2012019388A1/en active Application Filing
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US6427143B1 (en) * | 1998-04-10 | 2002-07-30 | Computer Associates Think, Inc. | Method for loading rows into a database table while enforcing constraints |
CN1255014A (en) * | 1998-10-09 | 2000-05-31 | 松下电器产业株式会社 | Programmable filter for removing filling bits from MPEG-2 bit stream |
CN1393849A (en) * | 2001-07-04 | 2003-01-29 | 英业达集团(南京)电子技术有限公司 | Speech playing method for electronic device |
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CN105224386B (en) * | 2015-09-06 | 2018-11-23 | 浪潮(北京)电子信息产业有限公司 | A kind of method and device improving virtual machine template efficiency of transmission |
CN105224698A (en) * | 2015-11-17 | 2016-01-06 | 盛趣信息技术(上海)有限公司 | Picture-storage system and method |
CN107168962A (en) * | 2016-03-07 | 2017-09-15 | 深圳市中兴微电子技术有限公司 | A kind of document handling method, client and user equipment |
Also Published As
Publication number | Publication date |
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WO2012019388A1 (en) | 2012-02-16 |
CN101917474B (en) | 2015-08-12 |
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