CN103841170B - A kind of cloud storage method and server - Google Patents
A kind of cloud storage method and server Download PDFInfo
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- CN103841170B CN103841170B CN201210491004.5A CN201210491004A CN103841170B CN 103841170 B CN103841170 B CN 103841170B CN 201210491004 A CN201210491004 A CN 201210491004A CN 103841170 B CN103841170 B CN 103841170B
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Abstract
The present invention relates to field of data storage, and more particularly to a kind of cloud storage method and server, the method is applied to server end, comprising: receive the file upload request that user sends, the upload request includes the unique features value of the file；Judged to obtain the first judging result with the presence or absence of identical file in server according to the unique features value of the file；When first judging result shows in server to obtain list of file references corresponding with the characteristic value there are when identical file, the mark of user is added to the list of file references；When first judging result shows feedback message to be sent to user, so that user is according to transmitting file on the feedback message there is no when identical file in server；The unique features value for storing the file and the file that upload, creates list of file references corresponding with the characteristic value；Save the mapping relations between the characteristic value, list of file references, file storage address of file.
Description
Technical field
The present invention relates to field of data storage, more particularly to a kind of cloud storage method and server.
Background technique
With the development of cloud computing (cloud computing) technology, cloud storage system has obtained extensive concern.Yun Cun
Storage is referred to through cluster application, grid or divides in new concept cloud computing conceptive extension and developed
Various types of storage equipment a large amount of in network are gathered collaboration by application software by the functions such as cloth file system
Work, it is common that a system of data storage and business access function is externally provided.Cloud storage is a kind of with data storage and pipe
Reason is the cloud computing system of core.
In the cloud storage system of the prior art, the data of user are independently saved as unit of account, same user's
File is kept separately together.However, in this manner, the same file in different accounts will be repeated quickly and easily as many times as required preservation,
The waste of memory space is caused, while causing the waste of user and server bandwidth resource, needs a kind of cloud storage side
Method solves the problems, such as this.
Summary of the invention
In order to solve the above technical problems, can be saved the embodiment of the invention provides a kind of cloud storage method and server
Memory space, reduces the occupancy of bandwidth resources, and method is realized simple.Technical solution is as follows:
According to a first aspect of the embodiments of the present invention, a kind of cloud storage method is provided, the method is applied to server
End, comprising:
The file upload request that user sends is received, the upload request includes the unique features value of the file；
Judged to obtain the first judgement knot with the presence or absence of identical file in server according to the unique features value of the file
Fruit；
When first judging result shows to obtain corresponding with the characteristic value in server there are when identical file
List of file references adds the mark of user to the list of file references；
When first judging result shows that identical file is not present in server, feedback message is sent to user,
So that user is according to transmitting file on the feedback message；The unique features value of the file and the file that upload is stored, newly
Build list of file references corresponding with the characteristic value；Save the characteristic value of file, list of file references, file storage address it
Between mapping relations.
Preferably, described create list of file references corresponding with the characteristic value specifically:
User identifier is added to the list of file references by new files reference listing, save list of file references with
The corresponding relationship of the characteristic value of file.
Preferably, the method also includes:
The file deletion requests of user are received, the removal request includes the unique features value of the file；
List of file references corresponding with the characteristic value is obtained according to the unique features value of the file；
User identifier corresponding with the user is deleted in the list of file references.
Preferably, the method also includes:
When the user identifier in the list of file references is empty, delete and the list of file references in the server
Corresponding file data.
Preferably, the method also includes:
The file download request of user is received, includes the unique features value of the file in the downloading request；
List of file references corresponding with the unique features value is obtained according to the unique features value of the file；
Judge that the user identifier of the user whether there is in list of file references, obtains the second judging result；
In the presence of second judging result shows that the user identifier of the user is in list of file references, according to text
Mapping relations between the characteristic value and file storage address of part obtain file data corresponding with the characteristic value；
By the file data transfer to user terminal.
Preferably, the method also includes:
User account information is stored, the account information includes user identifier, the file information；
When list of file references updates, user account information described in synchronized update.
According to a second aspect of the embodiments of the present invention, a kind of cloud storage service device is provided, comprising:
First receiving unit, for receiving the file upload request of user's transmission, the upload request includes the file
Unique features value；
First judging unit judges in server for the unique features value according to the file with the presence or absence of identical text
Part obtains the first judging result；It is single into addition when first judging result shows in server there are when identical file
Member；When first judging result shows that identical file is not present in server, into storage unit；
First acquisition unit obtains and institute for showing in server there are when identical file when the first judging result
The corresponding list of file references of characteristic value is stated, adds the mark of user to the list of file references；
Storage unit, for being sent to user when the first judging result shows that identical file is not present in server
Feedback message, so that user is according to transmitting file on the feedback message；Store the unique of the file and the file uploaded
Characteristic value creates list of file references corresponding with the characteristic value；Save characteristic value, the list of file references, file of file
Mapping relations between storage address.
Preferably, the storage unit includes that reference listing establishes unit, the reference listing establishes unit for creating
User identifier is added to the list of file references, saves the characteristic value of list of file references and file by list of file references
Corresponding relationship.
Preferably, the server further include:
Second receiving unit, for receiving the file deletion requests of user, the removal request include the file only
One characteristic value；
Second acquisition unit draws for obtaining file corresponding with the characteristic value according to the unique features value of the file
Use list；
Unit is deleted, for deleting user identifier corresponding with the user in the list of file references.
Preferably, the deletion unit is also used to servicing when the user identifier in the list of file references is empty
File data corresponding with the list of file references is deleted in device.
Preferably, the server further include:
Third receiving unit includes the file in the downloading request for receiving the file download request of user
Unique features value；
Third acquiring unit, for obtaining text corresponding with the unique features value according to the unique features value of the file
Part reference listing；
Second judgment unit is obtained for judging that the user identifier of the user whether there is in list of file references
Second judging result；
4th acquiring unit, the second judging result for sending when the judging unit show user's mark of the user
In the presence of knowledge in list of file references, according to the mapping relations between the characteristic value of file and file storage address, obtain with
The corresponding file data of the characteristic value；
Transmission unit is used for the file data transfer to user terminal.
Preferably, the storage unit is also used to store user account information, the account information includes user identifier, text
Part information；
The server further include:
Updating unit, for when list of file references updates, user account information described in synchronized update.
The one aspect of the embodiment of the present invention has the beneficial effect that cloud storage method provided in an embodiment of the present invention, with
On user orientation server when transmitting file, the unique features value of transmitting file is first gone up, when server has been deposited according to characteristic value judgement
In same file, the mark of user is only added in list of file references, and is operated without actual storage.In this way, phase
Only storage is a in the server for same file, saves memory space.On the other hand, when the upper transmitting file of user, text is first uploaded
The characteristic value of part just uploads file data, reduces bandwidth resources in this way when identical file being only not present in the server
Occupancy.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is cloud storage method first embodiment schematic diagram provided in an embodiment of the present invention；
Fig. 2 is cloud storage method second embodiment schematic diagram provided in an embodiment of the present invention；
Fig. 3 is cloud storage method 3rd embodiment schematic diagram provided in an embodiment of the present invention；
Fig. 4 is cloud storage service first embodiment schematic diagram provided in an embodiment of the present invention；
Fig. 5 is cloud storage service second embodiment schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Inventive embodiments provide a kind of cloud storage method and server, can save memory space, reduce bandwidth resources
Occupancy, method is realized simple.
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
It is cloud storage method flow chart of first embodiment provided by the invention referring to Fig. 1.
First embodiment of the invention provides a kind of cloud storage method, and the method is applied to server end, comprising:
S101, receives the file upload request that user sends, and the upload request includes the unique features value of the file.
In the first embodiment of the invention, when user wants the transmitting file on cloud storage service device, not with the prior art
With, file data is not uploaded directly, but unique features value corresponding with the file uploaded is first obtained in client, it will
File upload request comprising file unique features value is sent to cloud storage service device.Preferably, the file upload request is logical
The mode for crossing encryption is transmitted.The unique features value of the file is used for unique identification file.When specific implementation, the file
Unique features value can be using hashing algorithm obtain file cryptographic Hash, or with other algorithms calculate obtain spy
Sign mark.When it is implemented, MD5(Message-Digest Algorithm 5, message digest algorithm 5 can be used), SHA1
(Secure Hash Algorithm) calculates file content, unique features value of the value that will acquire as file.The present invention does not limit
The specific method for obtaining file unique features value, those skilled in the art are in other realities for not making the creative labor lower acquisition
Existing mode all belongs to the scope of protection of the present invention.
S102 judges to obtain first with the presence or absence of identical file in server according to the unique features value of the file
Judging result.
In the first embodiment of the invention, file data is stored in server and is used correspondingly with file data
In the file characteristic value of unique identification file.When server receives file upload request, server is asked according to file upload
Ask the file unique features value for including and the file characteristic value being saved in server to be compared, judge whether there is with
The identical file characteristic value of the characteristic value.If it is present determining that there are identical files in server.If it does not,
It then determines and identical file is not present in server.
S103, when first judging result shows to obtain and the characteristic value in server there are when identical file
Corresponding list of file references adds the mark of user to the list of file references.
In the first embodiment of the invention, corresponding file referenced column is created for each file (or file characteristic value)
Table, the list of file references include to possess the corresponding user identifier of user of this file.It is taken when according to the judgement of file characteristic value
It is engaged in device there are when identical file, obtains list of file references corresponding with file characteristic value, and by the user of upper transmitting file
Corresponding user identifier is added in list of file references.In this way, server is not when being stored with identical file in server
Must the identical file data that uploads of actual storage, and user identifier need to be added in reference listing only to show to be transmitted through on user
This file, same file need to only save portion, save memory space.Preferably, being used in list of file references in addition to saving
Outside the identification information at family, time, the user behavior information of the upper transmitting file of user can further include.User behavior information can
To include operation that user executes file, the content for the operation that last time executes and the time of execution etc..
Preferably, also storing the account information of user in server, account information includes user identifier, the file information etc..
The file information may include the corresponding filename of file, file size, the file characteristic value etc. that user stores.In this way, working as user
When wanting access to file, it can obtain the characteristic value of file by the account of user, and then obtain text according to file characteristic value
Number of packages evidence.
S104, when first judging result shows to send and feed back to user there is no when identical file in server
Message, so that user is according to transmitting file on the feedback message；Store the unique features of the file and the file that upload
Value creates list of file references corresponding with the characteristic value；Save characteristic value, list of file references, the file storage of file
Mapping relations between address.
When being judged in server according to file characteristic value there is no identical file, server is to client (or user
Equipment) feedback message is sent, the feedback message is for showing that there is no identical files in server.At this moment, user passes through
Client (or user equipment) sends file data to server.Server receives client (or user equipment) transmission
File data, store upload file and unique document characteristic value corresponding with the file.Server creates and the spy
The corresponding list of file references of value indicative adds the corresponding user's mark of user of upper transmitting file in the list of file references of creation
Know, and saves the mapping relations between the characteristic value, list of file references, file storage address of file.It, can be with when specific implementation
Come maintenance documentation reference listing, file characteristic value, the mapping relations between file storage address using database.So far, i.e., complete
At cloud storage operation.
In the first embodiment of the invention, when user is to server up transfer file, the first unique features value of upper transmitting file,
When server has existed same file according to characteristic value judgement, the mark of user is only added in list of file references
Know, and is operated without actual storage.In this way, only storage is a in the server for identical file, memory space is saved.
On the other hand, when the upper transmitting file of user, the first characteristic value of upper transmitting file, when identical file being only not present in the server,
File data is just uploaded, reduces the occupancy of bandwidth resources in this way.
It referring to fig. 2, is cloud storage method second embodiment schematic diagram provided in an embodiment of the present invention.
It will be illustrated below for the specific embodiment of the relevant operation of the file in cloud storage service device, this field skill
For art personnel it is understood that each embodiment that the present invention introduces is only a part of the embodiment, each embodiment can be independent
It is applicable in, can also be applicable in combination, those skilled in the art are equal in the other embodiments for not making the creative labor lower acquisition
It belongs to the scope of protection of the present invention.
First for deleting file, method provided in an embodiment of the present invention is introduced.
S201, receives the file deletion requests of user, and the removal request includes the unique features value of the file.
In actual implementation, user's login account in client or user equipment realizes the specific file in account
Delete operation.It is previously noted that may include the file information in the account information of user, when specific implementation, file column can be used
Table saves the file information.Delete operation of the user for the file in listed files or the file in account, it will trigger to
Server sends file deletion requests.Into the file deletion requests that server is sent, the file comprising executing delete operation
Unique features value.
S202, server judge with the presence or absence of identical file in server, such as according to the unique features value of the file
Fruit exists, and enters step S203, if it does not, returning to error message.
When specific implementation, server according in the file unique features value that includes in file deletion requests and server
The file characteristic value of preservation is compared, and judges whether there is file characteristic value identical with the characteristic value.If it is present
Determine that there are identical files in server.Identical file is not present in server if it does not exist, then determining.
S203, judging result show to obtain file corresponding with the characteristic value there are when identical file in server
Reference listing.
In the server, the one-to-one correspondence for saving list of file references and list of file references and file characteristic value closes
System.
S204 deletes user identifier corresponding with the user in the list of file references of acquisition.
In second embodiment of the invention, server is when receiving the deletion file request of user's transmission, not directly
File is deleted, and only needs to delete reference corresponding with the user in list of file references, that is, deletes the user couple
The user identifier answered.After deleting the user identifier in reference listing, user account information is updated.Specifically, from
Information corresponding with the file deleted is deleted in the file information in the account information of family.
Preferably, when that is, this document is not quoted by user, being taken when the user identifier in list of file references is empty
It is engaged in deleting file data corresponding with the list of file references in device.Due to storing list of file references, text in server
Mapping relations between part characteristic value, file storage address.Therefore, when server receives file deletion requests, according to file
Characteristic value gets list of file references corresponding with the file characteristic value, and deletes and user couple in list of file references
After the user identifier answered, when the user identifier in list of file references is empty, it can pass through list of file references or file
The corresponding relationship of characteristic value and file storage address obtains file actual storage address, and executes deletion and institute in the server
State the operation of the corresponding file data of list of file references.
In second embodiment of the invention, when receiving file deletion requests, do not delete directly in the server directly
File data, but by the file characteristic value in file deletion requests, obtain file referenced column corresponding with file characteristic value
Table, and delete the corresponding user identifier of user deleted in list of file references and send removal request.In this way, delete file also only
Corresponding reference in list of file references need to be deleted, is realized simple.
It is cloud storage method 3rd embodiment schematic diagram provided in an embodiment of the present invention referring to Fig. 3.
The specific embodiment by the download/access operation for the file in cloud storage service device is illustrated below.
S301, receives the file download request of user, and the downloading request includes the unique features value of the file.
In actual implementation, user's login account in client or user equipment carries out the specific file in account
Down operation.It is previously noted that may include the file information in the account information of user, when specific implementation, file column can be used
Table saves the file information.User is for the file in listed files or the down operation of the file in account, it will trigger to
Server sends file download request.Into the file download request that server is sent, the file comprising executing down operation
Unique features value.
S302, server judge with the presence or absence of identical file in server, such as according to the unique features value of the file
Fruit exists, and enters step S303, if it does not, returning to error message.
When specific implementation, server according in the file unique features value that includes in file download request and server
The file characteristic value of preservation is compared, and judges whether there is file characteristic value identical with the characteristic value.If it is present
Determine that there are identical files in server.Identical file is not present in server if it does not exist, then determining.
S303 obtains list of file references corresponding with the characteristic value.
In the server, the one-to-one correspondence for saving list of file references and list of file references and file characteristic value closes
System.
S304 judges that the user identifier of the user whether there is in list of file references, obtains the second judging result.
User identifier is retrieved in list of file references, if it is present proving that user has operating right.If do not deposited
Returning to error message.
S305, in the presence of second judging result shows that the user identifier of the user is in list of file references,
According to the mapping relations between the characteristic value of file and file storage address, file data corresponding with the characteristic value is obtained.
In third embodiment of the invention, server is when receiving the downloading file request of user's transmission, according to service
The list of file references that stores in device, file characteristic value, the mapping relations between file storage address, obtain file actual storage
Address, and get file data corresponding with the file characteristic value in downloading request.
S306, by the file data transfer to user terminal.
Above embodiments are illustrated, method provided in an embodiment of the present invention for executing down operation to file
It can be adapted for user equipment for other operations of the file stored in server.
In third embodiment of the invention, when executing downloading, access operation to the file in server, and pass through text
What part characteristic value operated with being associated.For user to the down operation of file, server can be according to file characteristic value and file
Reference listing judges whether user has operating right, if had permission, just allows user to execute and correspondingly operates, improve data
The safety of storage.
It referring to fig. 4, is a kind of cloud storage service device first embodiment schematic diagram provided in an embodiment of the present invention.
The server includes:
First receiving unit 401, for receiving the file upload request of user's transmission, the upload request includes the text
The unique features value of part.
First judging unit 402 judges in server for the unique features value according to the file with the presence or absence of identical
File, obtain the first judging result；When first judging result shows in server there are when identical file, into
One acquiring unit 403；When first judging result shows that identical file is not present in server, into storage unit
404。
First acquisition unit 403, for showing in server there are when identical file when the first judging result, obtain with
The corresponding list of file references of the characteristic value adds the mark of user to the list of file references.
Storage unit 404, for being sent out to user when the first judging result shows that identical file is not present in server
Feedback message is sent, so that user is according to transmitting file on the feedback message；Store the file uploaded and the file only
One characteristic value creates list of file references corresponding with the characteristic value；Save characteristic value, the list of file references, text of file
Mapping relations between part storage address.
Preferably, the storage unit 404 includes that reference listing establishes unit, the reference listing is established unit and is used for newly
List of file references is built, user identifier is added to the list of file references, saves the feature of list of file references and file
The corresponding relationship of value.
It is a kind of cloud storage service device second embodiment schematic diagram provided in an embodiment of the present invention referring to Fig. 5.
The server 500 includes:
First receiving unit 501, for receiving the file upload request of user's transmission, the upload request includes the text
The unique features value of part.
First judging unit 502 judges in server 500 for the unique features value according to the file with the presence or absence of phase
Same file obtains the first judging result；When first judging result shows in server 500 there are when identical file,
Into first acquisition unit 403；When first judging result shows to enter in server 500 there is no when identical file
Storage unit 404.
First acquisition unit 503, for showing to obtain in server 500 there are when identical file when the first judging result
List of file references corresponding with the characteristic value is taken, adds the mark of user to the list of file references.
Storage unit 504, for when the first judging result shows in server 500 there is no identical file, Xiang Yong
Family sends feedback message, so that user is according to transmitting file on the feedback message；Store the file and the file uploaded
Unique features value, create list of file references corresponding with the characteristic value；Save characteristic value, the file referenced column of file
Mapping relations between table, file storage address.
Preferably, the server 500 further include:
Second receiving unit 505, for receiving the file deletion requests of user, the removal request includes the file
Unique features value.
Second acquisition unit 506, for obtaining text corresponding with the characteristic value according to the unique features value of the file
Part reference listing.
Unit 507 is deleted, for deleting user identifier corresponding with the user in the list of file references.
Preferably, the deletion unit 507 is also used to taking when the user identifier in the list of file references is empty
It is engaged in deleting file data corresponding with the list of file references in device.
Preferably, the server 500 further include:
Third receiving unit 508 includes the file in the downloading request for receiving the file download request of user
Unique features value.
Third acquiring unit 509, it is corresponding with the unique features value for being obtained according to the unique features value of the file
List of file references.
Second judgment unit 510 is obtained for judging that the user identifier of the user whether there is in list of file references
Take the second judging result.
4th acquiring unit 511, the second judging result for sending when the judging unit show the use of the user
In the presence of family mark is in list of file references, according to the mapping relations between the characteristic value of file and file storage address, obtain
Take file data corresponding with the characteristic value.
Transmission unit 512 is used for the file data transfer to user terminal.
Preferably, the storage unit 504 is also used to store user account information, the account information includes user's mark
Know, the file information.
The server 500 further include:
Updating unit 513, for when list of file references updates, user account information described in synchronized update.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The present invention can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, programs, objects, group
Part, data structure etc..The present invention can also be practiced in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage equipment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method
Part explanation.The apparatus embodiments described above are merely exemplary, wherein described be used as separate part description
Unit may or may not be physically separated, component shown as a unit may or may not be
Physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to the actual needs
Some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying
In the case where creative work, it can understand and implement.
The above is only a specific embodiment of the invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of cloud storage method, which is characterized in that the method is applied to server end, comprising:
The file upload request that user sends is received, the upload request includes the unique features value of the file；
Judged to obtain the first judging result with the presence or absence of identical file in server according to the unique features value of the file；
When first judging result shows to obtain file corresponding with the characteristic value there are when identical file in server
Reference listing adds the mark of user to the list of file references；
When first judging result shows that identical file is not present in server, feedback message is sent to user, so that
User is obtained according to transmitting file on the feedback message；Store upload file and the file unique features value, create with
The corresponding list of file references of the characteristic value；It saves between the characteristic value, list of file references, file storage address of file
Mapping relations；Wherein, the list of file references includes to possess the corresponding user identifier of user of the file, for showing
Stating user has operating right to the file, when receiving operation of the user for the file, according to the file
File characteristic value and the list of file references judge whether user has operating right；When the judgment result is yes, allow
User executes operation；
The method also includes:
The file deletion requests of user are received, the removal request includes the unique features value of the file；
List of file references corresponding with the characteristic value is obtained according to the unique features value of the file；
User identifier corresponding with the user is deleted in the list of file references；
When the user identifier in the list of file references is empty, delete in the server corresponding with the list of file references
File data.
2. the method according to claim 1, wherein described create file referenced column corresponding with the characteristic value
Table specifically:
User identifier is added to the list of file references, saves list of file references and file by new files reference listing
Characteristic value corresponding relationship.
3. the method according to claim 1, wherein the method also includes:
The file download request of user is received, includes the unique features value of the file in the downloading request；
List of file references corresponding with the unique features value is obtained according to the unique features value of the file；
Judge that the user identifier of the user whether there is in list of file references, obtains the second judging result；
In the presence of second judging result shows that the user identifier of the user is in list of file references, according to file
Mapping relations between characteristic value and file storage address obtain file data corresponding with the characteristic value；
By the file data transfer to user terminal.
4. the method according to claim 1, wherein the method also includes:
User account information is stored, the account information includes user identifier, the file information；
When list of file references updates, user account information described in synchronized update.
5. a kind of cloud storage service device characterized by comprising
First receiving unit, for receive user transmission file upload request, the upload request include the file only
One characteristic value；
First judging unit judges in server for the unique features value according to the file with the presence or absence of identical file,
Obtain the first judging result；When first judging result shows in server there are when identical file, into adding unit；
When first judging result shows that identical file is not present in server, into storage unit；
First acquisition unit, for showing in server to obtain and the spy there are when identical file when the first judging result
The corresponding list of file references of value indicative adds the mark of user to the list of file references；
Storage unit, for sending and feeding back to user when the first judging result shows that identical file is not present in server
Message, so that user is according to transmitting file on the feedback message；Store the unique features of the file and the file that upload
Value creates list of file references corresponding with the characteristic value；Save characteristic value, list of file references, the file storage of file
Mapping relations between address；Wherein, the list of file references includes to possess the corresponding user identifier of user of the file,
For showing that the user has operating right to the file, when receiving operation of the user for the file, according to
The file characteristic value and the list of file references of the file judge whether user has operating right；When judging result is
When being, user is allowed to execute operation；
The server further include:
Second receiving unit, for receiving the file deletion requests of user, the removal request includes unique spy of the file
Value indicative；
Second acquisition unit, for obtaining file referenced column corresponding with the characteristic value according to the unique features value of the file
Table；
Unit is deleted, for deleting user identifier corresponding with the user in the list of file references；And when described
When user identifier in list of file references is empty, number of files corresponding with the list of file references is deleted in the server
According to.
6. server according to claim 5, which is characterized in that the storage unit includes that reference listing establishes unit,
The reference listing establishes unit for new files reference listing, and user identifier is added to the list of file references, protects
Deposit the corresponding relationship of the characteristic value of list of file references and file.
7. server according to claim 5, which is characterized in that the server further include:
Third receiving unit includes the unique of the file in the downloading request for receiving the file download request of user
Characteristic value；
Third acquiring unit is drawn for obtaining file corresponding with the unique features value according to the unique features value of the file
Use list；
Second judgment unit obtains second for judging that the user identifier of the user whether there is in list of file references
Judging result；
4th acquiring unit, the second judging result for sending when the judging unit show that the user identifier of the user exists
In the presence of in list of file references, according to the mapping relations between the characteristic value of file and file storage address, obtain with it is described
The corresponding file data of characteristic value；
Transmission unit is used for the file data transfer to user terminal.
8. server according to claim 5, which is characterized in that the storage unit is also used to store user account letter
Breath, the account information includes user identifier, the file information；
The server further include:
Updating unit, for when list of file references updates, user account information described in synchronized update.
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