CN102882985B - Based on the file sharing method that cloud stores - Google Patents
Based on the file sharing method that cloud stores Download PDFInfo
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Abstract
The invention discloses a kind of file sharing method stored based on cloud, first user arranges Shared Folders and sharing users in the online file of cloud storage server, and Shared Folders is synchronized in the online file of the second user with in local folders, the Shared Folders file of online file, by the online file of poll, is synchronized in the Shared Folders of local folders by the second user.If Shared Folders is LAN-sharing file, be then synchronized in the LAN-sharing file of the local folders of the second user by the LAN-sharing file file of local area network (LAN) by the local folders of first user.Thus achieving the online file-sharing stored based on cloud, the present invention can realize sharing of shared file very easily, and has effectively saved local area network (LAN) outlet bandwidth, improves shared speed.
Description
Technical field
The present invention relates to cloud memory technology, particularly relate to a kind of file sharing method stored based on cloud.
Background technology
Along with the development of Internet technology, cloud computing and cloud store the concern being just more and more subject to IT industry circle, and its application is also promoted gradually, obtains favorable comment widely.Cloud storage is in cloud computing (cloudcomputing) conceptive extension and the new concept of development out one, cloud computing is the development of distributed treatment (Distributed Computing), parallel processing (Parallel Computing) and grid computing (GridComputing), be through network and huge computing program be split into numerous less subprogram automatically, then the bulky systems transferring to multi-section server to form analyze as calculated after result is returned to user.By cloud computing technology, Internet Service Provider can within the several seconds, process number in necessarily even hundred million information, reach and " supercomputer " powerful equally network service.Concept and the cloud computing of cloud storage are similar, it refers to by functions such as cluster application, grid or distributed file systems, various dissimilar memory device a large amount of in network is gathered collaborative work by application software, a system of data storage and Operational Visit function is externally provided jointly.All devices in cloud form storage system is all completely transparent to user, and Anywhere any one can be connected with cloud storage by an access cable through the user authorized, and is stored into row data access to cloud.
In cloud storage scheme conventional at present, the data of user are stored in cloud storage server, and the arbitrary equipment accessing Internet of user, can take the data be stored in cloud storage server, and applying in a flexible way of multiple stage terminal can be realized, be not limited in which station terminal.
But for the collaborative work of multi-user, how to utilize cloud memory technology, the cloud realizing multi-user stores content and shares and collaborative work, still imperfect solution.Simultaneously, store in cloud server at line file, local file must to be transferred in online file directory by Internet bandwidth and to store by client software, and the client of user needs to read shared file from online file directory and is transferred to local realization to be shared.The method of visible prior art takies outlet bandwidth, and occupies a large amount of cloud server storage resources, the cloud Storage sharing between inapplicable LAN subscriber.
Summary of the invention
Object of the present invention is exactly to solve the multiple users share resource the problem of collaborative work that store based on cloud, LAN subscriber is when carrying out cloud Storage sharing simultaneously, take the problem of network egress bandwidth, a kind of method of cloud Storage sharing is provided, takies Internet resources few.
The present invention proposes a kind of file sharing method stored based on cloud, for passing through cloud storage server shared file between users, described user comprises first user and the second user, described first user and the second user include the online file being arranged on cloud storage server end, and be arranged on local local folders, described online file sharing method comprises step:
First user creates Shared Folders in described online file, and arranges at least one second user and share created Shared Folders;
The shared information of described Shared Folders is uploaded to cloud storage server by first user;
Information shared in described cloud storage server record, according to described shared information, in the online file of the second user, increases described Shared Folders;
Second user's poll cloud storage server, is synchronized to local folders by the Shared Folders in cloud storage server.
Wherein, described shared information comprises: Shared Folders title, Shared Folders bibliographic structure, sharing users and shared attribute.
Further, described online file sharing method also comprises step:
The Shared Folders file of the local folders of first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Whether the current version number that the file last revision that changes relatively number and cloud storage server return there occurs jump, if do not jumped, then the version information of the described file that changes and correspondence thereof is stored in cloud storage server, if there occurs jump, then revise filename, the version information of the described file that changes and correspondence thereof is stored in cloud storage server;
First user or second user's poll cloud storage server, whether the Shared Folders relatively in the Shared Folders of the local folders of oneself and cloud storage server has missing documents, search in the Shared Folders of described online file if any just corresponding according to the lacked file version information of disappearance, connect with cloud storage server after finding corresponding file, by the file synchronization that finds in the Shared Folders of local folders.
Sharing of file between sharing users is achieved by above step, and user can be presented to the different editions that the different editions of identical file is organized as same file by cloud storage server, user can download each version, deletion action, also can, by file access pattern to the version of specifying, can also prevent user from revising the version conflict caused simultaneously simultaneously.
Further improvement of the present invention, described first user and the second user are in same local area network (LAN), and described Shared Folders is LAN-sharing file.Wherein, described shared information comprises: LAN-sharing Folder Name, LAN-sharing folder content structure, sharing users and shared attribute.Then described online file sharing method also comprises step:
The LAN-sharing file file of the local folders of first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Whether the current version number that the file last revision that changes relatively number and cloud storage server return there occurs jump, if do not jumped, then version information corresponding for the described file changed is stored in cloud storage server, if there occurs jump, then revise filename, version information corresponding for the described file changed is stored in cloud storage server;
First user or second user's poll cloud storage server, whether the LAN-sharing file compared in the LAN-sharing file of the local folders of oneself and cloud storage server has missing documents, if any disappearance just to local area network (LAN) transmission broadcasting packet;
The sharing users receiving broadcasting packet is searched in the LAN-sharing file of local folders according to the version information of lacked file, connect after finding corresponding file and between the user sending broadcasting packet, by the file synchronization found to send broadcasting packet user local folders LAN-sharing file in.
Achieve sharing of local area network (LAN) file by above-mentioned steps, the synchronizing direct of local area network (LAN) file connected local area network (LAN) synchronously, did not need to take local area network (LAN) outlet bandwidth.
Further, described version information comprises filename, file hash, version number, corresponding reviser and modification time.
According to the version information of file, particularly according to file hash, by comparison document hashed value, the disappearance file that will search can be found, describedly carry out ff according to file version information, comprise step:
Search the file identical with described file version information file hashed value, the file found and described disappearance file.By file hash unique identification file, the different editions file of same file name is distinguished, to realize the synchronous of file accurately.
The present invention is based on the file sharing method that cloud stores, user arranges Shared Folders and sharing users by client in the online file of cloud storage server, and is synchronized in the online file of each sharing users by Shared Folders.Keep synchronous between the file of user this locality and online file, thus realize whichever sharing users the file in Shared Folders is modified, file synchronization can both be realized between sharing users.Meanwhile, present invention also offers colophon, record can be made to the version modify that identical file is made, and the version file of conflict is preserved by amendment filename.Facilitate the collaborative work of sharing users.
Especially, if Shared Folders is LAN-sharing, the shared information of local area network (LAN) file is set up in cloud storage server, an i.e. virtual folder content, file in the LAN-sharing file of user is directly downloaded by the local folders of local area network (LAN) from sharing users, does not need to be downloaded to cloud storage server by the Internet.All that gigabit connects usually in current local area network (LAN), and Internet bandwidth is general all within 10Mb, the upstream bandwidth that some ADSL connect is within 512Kb, in local area network (LAN), directly the speed of transmission is higher than internet transmission speed 100 times to about 8000 times, therefore the speed shared is faster, decreases the network application taking of outlet bandwidth being caused to other users simultaneously.Also bring a benefit by the technological improvement of this programme, even when carrying out synchronous to the file in on-line storage, if find that in local area network (LAN), other client has this file, also directly can start local network transport, thus save the transmission time.
Accompanying drawing explanation
Fig. 1 is the shared file system structural representation that the present invention is based on cloud storage;
Fig. 2 is the file sharing method flow chart that the present invention is based on cloud storage;
Fig. 3 is the file-sharing file synchronisation method flow chart that the present invention is based on cloud storage;
Fig. 4 is the file-sharing file local online article part synchronous method flow chart that the present invention is based on cloud storage.
Embodiment
Be described in further details technical solution of the present invention below in conjunction with drawings and Examples, following examples do not form limitation of the invention.
Shared file system based on cloud storage comprises the cloud storage server of accessing Internet, and the user of accessing Internet.As shown in Figure 1, user A and user B, in same local area network (LAN), is linked into the Internet; User C and user D, in another one local area network (LAN), is linked into the Internet.
The terminal equipment of each user is made up of local computer and the client of installing on the local computer, client is by http or other procotol and cloud storage server end communication, get bibliographic structure and file content that user is stored in the online file of cloud storage server, client usually can be specified with user or default behavior determines that local folders on a local computer is for synchronous directory, the bibliographic structure of online file and file content are downloaded to local folders automatically, realize the content synchronization of local folders and online file.Simultaneously client by timing to cloud storage server poll, when online folder content changes, can by the file download that changes accordingly in catalogue corresponding to local folders.
The file sharing method that the present invention is based on cloud storage as shown in Figure 2, comprises step:
Step 201, first user create Shared Folders in online file, and arrange at least one second user and share created Shared Folders.
It is Shared Folders that user can arrange existing online file, or a newly-built Shared Folders, " Shared Folders A " that such as user A is stored in the online file of cloud storage server is set to share, or it is directly newly-built, and allowing user B, user C and user D shares this file.User A, user B, user C and user D are also called sharing users.
The shared information of Shared Folders is uploaded to cloud storage server by step 202, first user.
Particularly, the shared information of " Shared Folders A " is uploaded to cloud storage server by user A, and shared information comprises this article part folder title, folder content structure, sharing users and shared attribute.
Information shared in step 203, cloud storage server record, according to shared information, in the online file of the second user, increase Shared Folders.
Particularly, information shared in cloud storage server record, according to described shared information at its sharing users B, increases " Shared Folders A " in the online file of user C and user D.
Step 204, second user's poll cloud storage server, be synchronized to local folders by the Shared Folders in cloud storage server.
After user B, user C and user D log in client, respective clients poll cloud storage server, inquires the shared information of the Shared Folders of oneself to cloud storage server, produces the catalogue of " Shared Folders A " in local folders.
It should be noted that, " the Shared Folders A " that set up in above-mentioned steps shares based on cloud storage server, that is user A is after foundation " Shared Folders A ", the client meeting poll cloud storage server of user A, " Shared Folders A " is set up in default folder in this locality or the file of specifying, and by the file download in cloud storage server " Shared Folders A " in local " Shared Folders A ", realize the synchronous of two places.Equally, at user B, after user C and user D is based upon line file folder " Shared Folders A ", also can poll cloud storage server, " Shared Folders A " is set up in default folder in this locality or the file of specifying, and by the file download in cloud storage server " Shared Folders A " in local " Shared Folders A ", realize the synchronous of two places.
When amendment occurs the file of " the Shared Folders A " of user this locality, its client learns the amendment of file by the system call of operating system, the redaction of this file can be uploaded to the path that the online file of cloud storage server is corresponding.When amendment occurs the file of user A, user B, user C and user D local folders separately, all the redaction of this file can be uploaded to the catalogue that the online file of respective cloud storage server is corresponding.For " the Shared Folders A " of user A, the file of whichever user in the synchronous directory of the correspondence " Shared Folders A " of this locality changes, and the redaction of this file can be uploaded to " the Shared Folders A " of cloud storage server." Shared Folders A " file equally for cloud storage server changes, and also can cause the file in each user's local folders in " Shared Folders A " that corresponding change occurs.
First user of the present invention or synchronous between the Shared Folders of the second user in this locality and the Shared Folders file of high in the clouds memory, as shown in Figure 3, comprise the steps:
The local folders file of step 301, first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Step 302, compare the current version number that the file last revision that changes number and cloud storage server return and whether there occurs jump, if do not jumped, then the version information of the file changed and correspondence thereof is stored in cloud storage server, if there occurs jump, then revise filename, the version information of the file changed and correspondence thereof is stored in cloud storage server;
Step 303, first user or second user's poll cloud storage server, whether the Shared Folders relatively in oneself local folders in Shared Folders and cloud storage server has missing documents, search in the Shared Folders of described online file if any just corresponding according to the lacked file version information of disappearance, reply after finding corresponding file, connect with cloud storage server, by the file synchronization that finds to local folders.
It should be noted that, here version information comprises the filename of file, file hash (filehash), version number, corresponding reviser and modification time, wherein file hash is the unique file identification of file set up by hash algorithm, MD5, SHA1 is current most widely used hash (HASH) algorithm, the hashed value of certain file be exactly by the content of certain file from start to finish byte-by-byte carry out the computing of MD5 or SHA1 algorithm, finally obtain the hashed value of this file, therefore file hash is only relevant to file content, two files that content is identical can obtain identical file hash.Although likely there is the situation that the different file of content also obtains same file hashed value, in actual applications, the probability that, total files limited at number of users is limited, this thing happens is very little.For SHA1 algorithm, its hashed result represents with 2 systems of 160, that is can represent about 1.46 × 10
48plant the possibility of file.Current industry generally uses MD5 or SHA1 algorithm file content to be carried out to the mark of uniqueness.When a series of change occurs for some like this files, the content of what actual storage was got up is a series of different editions, the different editions that this line item is organized as same file by cloud storage server presents to user.Client can access these release contents, can also download, deletion action to each version, also can by file access pattern to the version of specifying.
The file sharing method that the present invention is based on cloud storage can also judge version conflict, namely when file is shared, the situation that the same version of many people to certain file is modified may occur, and at this moment whether client is jumped to judge whether there occurs by the contrast of the current version that returns file last revision number and cloud storage server number and is conflicted; If there occurs conflict, then revise filename and store.Usually, when not conflicting, after the current version number that cloud storage server returns is revised with user file, the version number reported is consistent; Only have in case of a collision, because conflict causes there has been the version number that this file is new in online file, so the version number returned is inconsistent with the version number reported, just had jump.
Particularly, the version number that " the menu .doc " in shared file file of user A is original is V1, user A revises " menu .doc ", and in the version information reported after amendment, version number is V2, and cloud storage server can return a current version number to be come for user A.In case of no collision, the version number returned is V2, then carry out the storage of " menu .doc " file with version number V2, if in the case of a conflict, namely user B also have modified " menu .doc " simultaneously, and store prior to user A, its version number is V2, after now user A reports version information, the version number that cloud storage server returns is V3, there occurs jump, then user A needs to revise filename, as " menu (2) .doc " stores, now can make one of following two kinds of processing modes to " menu (2) .doc ": mode one, its version number is V2 and the content of its version number V1 is pointed to the V1 version of " menu .doc ", mode two, its version number is that V1 is without old version.
As a further improvement on the present invention, for the user having file sharing needs in same local area network (LAN), such as user A and user B, although need the targeted customer shared just in same local area network (LAN), sync client is all between local computer and cloud storage server, carry out file transfer by the Internet.This mode do not have direct in local area network (LAN) swap file, but around a long way, not only occupy outlet bandwidth, and make synchronous efficiency not high owing to not utilizing the high-speed transfer speed of local area network (LAN).In order to address this problem, file-sharing synchronizing function in local area network (LAN) is integrated in sync client by the present invention, user is allowed directly in local area network (LAN), to carry out file synchronization mutually, without cloud storage server as central point, All Files all disperses to be stored in the subscriber computer in local area network (LAN), but LAN-sharing file and its bibliographic structure and shared information are still recorded in cloud storage server, the version information of each file is also have recorded at cloud storage server, comprise filename, file hash (filehash), version number, the additional informations such as corresponding reviser (founder) and modification time, wherein file hash is the unique file identification of file set up by hash algorithm.
The online file local network sharing method that the present invention is based on cloud storage is identical with the method flow shown in Fig. 2, difference is, what preserve in cloud storage server during LAN-sharing is only the shared information of LAN-sharing file, do not comprise concrete file content, and its file download is downloaded from this locality of sharing users, does not need local area network (LAN).During LAN-sharing, between sharing users, the method for file synchronization as shown in Figure 4, comprises step:
The local folders file of step 401, first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Step 402, relatively described in the current version number that returns of the file last revision that changes number and cloud storage server whether there occurs jump, if do not jumped, then version information corresponding for the described file changed is stored in cloud storage server, if there occurs jump, then revise filename, version information corresponding for the described file changed is stored in cloud storage server;
Step 403, first user or second user's poll cloud storage server, relatively in oneself local folders, whether LAN-sharing file has missing documents with the LAN-sharing file in cloud storage server, if any disappearance just to local area network (LAN) transmission broadcasting packet;
Step 404, the sharing users receiving broadcasting packet are searched in the LAN-sharing file of local folders according to the version information of lacked file, reply after finding corresponding file, and connect between the user sending broadcasting packet, by the file synchronization that finds to send broadcasting packet user local folders LAN-sharing file in.
Particularly, still for Fig. 1, when user A creates " local area network (LAN) file ", user A client is by the shared information reporting cloud stores service end of " local area network (LAN) file ", shared information comprises this article part folder title, folder content structure, sharing users and shared attribute, and shared attribute is here LAN-sharing.Information shared in cloud storage server record, and in its sharing users, such as, increase " local area network (LAN) file " in the online file of user B.It should be noted that, owing to being LAN-sharing, so what increase in the online file of user B is only the shared information of " local area network (LAN) file ", do not comprise the content of file.
When user B starts client, client obtains the shared information of " local area network (LAN) file " from the online file of user B, and contrast with local folders, if not then " local area network (LAN) file " is created in local folders, and compare " local area network (LAN) file " in the local folders of oneself and whether have missing documents with " the local area network (LAN) file " in cloud storage server, if any just sending broadcasting packet to local area network (LAN), user A searches in the LAN-sharing file of local folders according to the version information of lacked file after receiving broadcasting packet, reply after finding corresponding file, connect between user A and user B and carry out file transfer.
Particularly, when user A or user B client find to create file in " the local area network (LAN) file " of user local folders from system call, it can be this file generated file hash (filehash), simultaneously by the version information of this file, comprise filename, file hash, version number, corresponding reviser and modification time and all report cloud storage server, these information of cloud storage server record and generate version number response to client.Similarly, when client finds that user's amendment have updated the file in " local area network (LAN) file " from system call, the filehash that meeting calculation document is new, upgrade the file version information of cloud storage server end, these information of cloud storage server record and generate version number response to client simultaneously.When transaction file, if find that the version number of cloud storage server increases progressively to there occurs jump, then supporting paper there occurs conflict, at this moment client by file to increase the mode renames such as digital number suffix.
Particularly, client meeting periodic polling cloud storage server, the lastest imformation of file structure is returned client by cloud storage server, when client terminal to discover has a new file, broadcast can be sent to local area network (LAN), with filehash value locating file, gathering around documentary client can respond, and sets up transmission connection and start transmission between client.After being transmitted, the client obtaining newly-increased file is to additional informations such as service end inquiry file versions and be kept at this locality.Through such function i ntegration, the user that can realize in same local area network (LAN) directly carries out file synchronization operation, selects flexibly for user provides.
It should be noted that, with file hash locating file in the present invention, be the file hash by comparison document, the file that file hash is identical is the file that content is identical.Meanwhile, in LAN-sharing, because file content does not leave in cloud storage server, therefore, client needs to open up the old version of a local cache district in order to storing documents.
Above embodiment is only in order to illustrate technical scheme of the present invention but not to be limited; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. the file sharing method stored based on cloud, for passing through cloud storage server shared file between users, it is characterized in that, described user comprises first user and the second user, described first user and second is with having the online file being arranged on cloud storage server end per family, and be arranged on local local folders, described file sharing method comprises step:
First user creates Shared Folders in described online file, and arranges at least one second user and share created Shared Folders;
The shared information of described Shared Folders is uploaded to cloud storage server by first user;
Information shared in described cloud storage server record, according to described shared information, in the online file of the second user, increases described Shared Folders;
Second user's poll cloud storage server, is synchronized to local folders by the Shared Folders in cloud storage server.
2. file sharing method according to claim 1, is characterized in that, described shared information comprises: Shared Folders title, Shared Folders bibliographic structure, sharing users and shared attribute.
3. file sharing method according to claim 1, is characterized in that, described file sharing method also comprises step:
The Shared Folders file of the local folders of first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Whether the current version number that the file last revision that changes relatively number and cloud storage server return there occurs jump, if do not jumped, then the version information of the described file that changes and correspondence thereof is stored in cloud storage server, if there occurs jump, then revise filename, the version information of the described file that changes and correspondence thereof is stored in cloud storage server;
First user or second user's poll cloud storage server, whether the Shared Folders relatively in the Shared Folders of the local folders of oneself and cloud storage server has missing documents, search in the Shared Folders of described online file if any just corresponding according to the lacked file version information of disappearance, connect with cloud storage server after finding corresponding file, by the file synchronization that finds in the Shared Folders of local folders.
4. file sharing method according to claim 1, is characterized in that, described first user and the second user are in same local area network (LAN), and described Shared Folders is LAN-sharing file.
5. file sharing method according to claim 4, is characterized in that, described shared information comprises: LAN-sharing Folder Name, LAN-sharing folder content structure, sharing users and shared attribute.
6. file sharing method according to claim 4, is characterized in that, described file sharing method also comprises step:
The LAN-sharing file file of the local folders of first user or the second user changes, and version information corresponding for the file changed is reported cloud storage server, and cloud storage server returns current version number;
Whether the current version number that the file last revision that changes relatively number and cloud storage server return there occurs jump, if do not jumped, then version information corresponding for the described file changed is stored in cloud storage server, if there occurs jump, then revise filename, version information corresponding for the described file changed is stored in cloud storage server;
First user or second user's poll cloud storage server, whether the LAN-sharing file compared in the local folders of oneself in LAN-sharing file and cloud storage server has missing documents, if any disappearance just to local area network (LAN) transmission broadcasting packet;
The sharing users receiving broadcasting packet is searched in the LAN-sharing file of local folders according to the version information of lacked file, connect after finding corresponding file and between the user sending broadcasting packet, by the file synchronization found to send broadcasting packet user local folders LAN-sharing file in.
7. the file sharing method according to claim 3 or 6, is characterized in that, described version information comprises filename, file hash, version number, corresponding reviser and modification time.
8. file sharing method according to claim 7, is characterized in that, described searches according to the file version information of lacked file, comprises step:
Search the file identical with described file version information file hashed value, the file found and described disappearance file.
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