CN115238654A - Multi-user online real-time collaborative editing system - Google Patents
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Abstract
The invention discloses a multi-user online real-time collaborative editing system, which comprises a login registration module, a project creation module, a text file creation module, a document sharing module and collaborative editing; the login registration module is used for knowing the user identity participating in the project collaborative editing; the project creating module is used for creating projects by a creator and sharing the projects to other users; the authority module is used for setting the cooperation authority when the document is shared; the synchronization module is used for performing synchronous cooperation on the user side according to the cooperation authority; and the historical version module is used for viewing and rolling back the historical version. The method adopts OT algorithm to acquire the modified version of the document in real time, carries out two-way communication with the server through WebSocket protocol in real time, records and synchronizes the modification of the document, can return to the edited content at any previous moment, and can ensure the safety of data and synchronize the latest state of the project document to the user terminal in real time.
Description
Technical Field
The invention relates to the technical field of multi-user real-time collaborative project editing, in particular to a multi-user online real-time collaborative editing system.
Background
At present, the existing online collaboration system in China only performs collaborative editing on a single document, for example, a graphite document only can create single document collaborative editing, but not project collaborative editing, where a project refers to a file directory tree structure including multiple files, and the files include both text files and non-text files, such as pictures and PDF.
The operation of the project file directory tree can also be synchronized to collaborators in real time, and the operation comprises file deletion, file creation, file uploading, file renaming, file moving and the like. For the historical versions of the documents, the existing products in China only save the versions and return to a certain saved historical version, and the playback function of the historical modification process of the documents is not provided, so that the modification process of document editing cannot be checked, and the existing products cannot return to any historical version, namely the existing products cannot return to the contents of the documents edited at a certain moment.
In addition, the existing domestic online collaboration system is separated from communication software, and the fusion of project document collaboration and communication cannot be realized
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a multi-user online real-time collaborative editing system to overcome the technical problems in the prior art.
Therefore, the invention adopts the following specific technical scheme:
a multi-user online real-time collaborative editing system comprises a login and registration module, a project creation module, a text file creation module, a document sharing module and collaborative editing;
the login registration module is used for knowing the user identity participating in the project collaborative editing;
the project creating module is used for creating projects by a creator and sharing the projects to other users;
the permission module is used for setting the cooperation permission when the document is shared;
the synchronization module is used for performing synchronous cooperation on the user side according to the cooperation authority;
and the historical version module is used for checking and rolling back the historical version.
Further, the user identity includes a user ID and a user name.
Further, the item includes a file directory tree structure of a plurality of files;
wherein the files include text files and non-text files.
Further, the text files comprise a product white paper, a product requirement specification, a pushed soft text, a design document and a document which needs to be edited by a team in a same time and different places in a coordinated manner.
Further, the project sharing comprises sending a project sharing link address to other users or project creators to directly add other users;
if the project sharing is successful, the other users are called collaborators.
Further, the method for setting the collaboration right when sharing the document further includes the following steps:
the creator sets different authority operations according to own requirements, and other people only have reading authority and do not modify the authority;
wherein, the authority of the collaborators can only be provided by the creator;
when the front-end editor edits the content, the content is edited by multiple persons in a collaborative mode, the OT algorithm is used for obtaining the operation of modifying the content of the document in real time, and the content edited by the multiple persons in the collaborative mode is synchronously stored to the cloud in real time.
Further, the OT algorithm includes the steps of:
describing modification of document data;
the modification of the document content is carried out by bidirectional communication between a WebSocket protocol and a server;
modifications to the document content are recorded and synchronized.
Furthermore, the synchronization comprises that the document editing content is automatically stored to the cloud end without manual storage, so that the loss of the document content caused by power failure misoperation is avoided.
Further, the permission operation includes creating a text file, deleting a file, moving a file, uploading a file, creating a folder, and renaming a file.
Further, the synchronous collaboration includes synchronous project document uploading, synchronous new project documents, synchronous project document deletion, and synchronous project document content.
The invention has the beneficial effects that:
1. the method adopts the OT algorithm to obtain the modified version of the document in real time, carries out two-way communication between the WebSocket protocol and the server in real time, records and synchronizes the modification of the document, can check all the historical version modification records of the document, and can return to the edited content at any moment before.
2. In the aspect of service architecture design, as the key service components support horizontal capacity expansion, the simultaneous online of tens of thousands of people can be realized, and as the redundancy design of storage is adopted, the safety of data can be ensured, and the latest state of project documents can be synchronized to a user side in real time.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic block diagram of a multi-user online real-time collaborative editing system according to an embodiment of the present invention;
FIG. 2 is a timing diagram of a multi-user online real-time collaborative editing system in a multi-user online real-time collaborative editing system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a basic idea of OT content consistency in a multi-user online real-time collaborative editing system according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating multi-user collaboration in a multi-user online real-time collaborative editing system according to an embodiment of the present invention
Fig. 5 is a diagram of a multi-person online collaboration system architecture, according to another embodiment of the invention.
In the figure:
1. logging in a registration module; 2. a project creation module; 3. a permission module; 4. a synchronization module; 5. and a history version module.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable one skilled in the art to understand the embodiments and advantages of the disclosure for reference and without scale, wherein elements are not shown in the drawings and like reference numerals are used to refer to like elements generally.
According to an embodiment of the invention, a multi-user online real-time collaborative editing system is provided.
Referring to fig. 1-2, the multi-user online real-time collaborative editing system according to the embodiment of the present invention includes a login module, a project creation module, a text file creation module, a document sharing module, and collaborative editing;
the login registration module 1 is used for knowing the user identity participating in the project collaborative editing;
in one embodiment, the user identity includes a user ID and a username.
The project creating module 2 is used for creating projects by a creator and sharing the projects to other users;
in one embodiment, the item comprises a file directory tree structure of a plurality of files;
wherein the files comprise text files and non-text files;
in specific application, the project is shared with other users by copying a link address of the project and then sending the link address to other users, and the other users open the project through the link address; or the project creator adds the user through the mailbox; the link address is a cloud link address;
in one embodiment, the text files include product white papers, product requirements specifications, pushed soft texts, design documents, and documents that require team collaborative editing at the same time and at different locations.
The authority module 3 is used for setting a cooperation authority when sharing the document;
in one embodiment, the item sharing comprises sending an item sharing link address to other users or an item creator to directly add other users;
if the project sharing is successful, the other users are called collaborators;
in one embodiment, the method for setting the collaboration right when sharing the document further includes the following steps:
the creator sets different authority operations according to own requirements, and other people only have reading authority and do not modify the authority;
wherein, the authority of the collaborators can only be provided by the creator;
in specific application, a user creates a project, the user is called as a project creator, only the project creator can view the collaborator list and set collaborator permissions, and cooperation among collaborators with limited identities is performed by setting the permissions; if the user without the authority needs to join the cooperation, the project creator is required to share the authorization; after the user is added as a collaborator, the project document can be opened, the collaboration authority is a read-only authority and an editable authority, the read-only authority only has a viewing authority for the project document, and the project document can not be edited, and if the user is a project creator, the project document can be edited; if the user is a collaborator and is set as a read-only permission, only the project document has a viewing permission, and the project document cannot be edited; if the user is a collaborator and is set as an editable authority, document editing can be carried out; if the user is not a collaborator and a project creator, the user does not have the right to open the project document;
when the front-end editor edits the content, collaboratively editing the content by multiple persons, acquiring the operation of modifying the content of the document in real time by using an OT (root-probability) algorithm, and synchronously storing the collaboratively edited content by the multiple persons to a cloud end in real time;
in concrete applications, the operations can be abstracted into three atomic behaviors: retain-hold operation, insert-Insert operation, delete-Delete operation;
the editing content is actually an operation sequence of atomic behaviors;
in one embodiment, the OT algorithm includes the steps of:
describing modification of document data;
the modification of the document content is in two-way communication with the server through a WebSocket protocol;
recording and synchronizing the modification of the document content;
in specific applications, the OT algorithm is implemented as follows, and the basic idea of keeping the content consistency of the OT algorithm is shown in fig. 3, two users open the same online document in a browser, and the initial content of the document is "xyz"
User 1 and user 2 operate simultaneously, the operation of user 1 is O1= Insert (0, "a"), indicating that in position 0, the character string a is inserted; the operation of user 2 is O2= Delete (2,1), indicating that the element is deleted from the second position, and the deletion length is 1
The character string in the browser of the user 1 is changed into 'axyz', after the O2 operation reaches the browser of the user 1, the O2'= Transform (O2, O1) = Delete (3,1) occurs with the O1, although the O2' also executes the deletion operation, because the a character string is inserted into the O1, the deleted position +1, O2 'becomes the element with the deletion starting position of 3, the deletion length is 1, the O2' operation is executed on the 'axyz', the character string local to the user 2 becomes 'axy'
The character string in the browser of user 2 is changed to "xy" first, after the O1 operation reaches the browser of user 2, and the O2 conversion occurs, O1'= Transform (O1, O2) = Insert (0, "a"), because the element deleted by O2 is started from the second position, and there is no influence on adding the element to O1', O1'= O1, the O1' operation is performed on "xy", and the character string local to user 2 becomes "axy"
In a word, OT generates a new operation through a Transform conversion method, so that the contents of the two browsers are kept consistent after the current character string is applied to a conversion algorithm; the Transform conversion method is a conventional technical means;
in a specific application, as shown in fig. 4, two users open the same online document a in browsers, and the initial latest version number of the document a is: x, simultaneously operating by a user 1 and a user 2, wherein the operation of the user 1 is O1, the operation of the user 2 is O2, and the O1 and the O2 are editing and modifying operations; the browser uploads the editing and modifying operations O1 and O2 of the user 1 and the user 2 to a WebSocket Service server in real time through a WebSocket, then routes the editing and modifying operations O1 and O2 to a document A queue, the editing and modifying operations O1 are taken out from the document A queue for processing, the version number of the O1 is x +1 and is the next version number of the latest version number x of the document A, then the editing and modifying operations O1 are put in storage, the latest version number of the document A is updated to be x +1, and meanwhile the editing and modifying operations O1 are pushed to the browsers of the user 1 and the user 2 through the WebSocket; then, taking out the editing and modifying operation O2 from the document A queue for processing, and discarding the editing and modifying operation O2 of the user 2 by the server side because the version number of the O2 is x +1 and the latest version number of the document A is also x +1 at the moment and the requirement of the next version number is not met; further, browsers of the user 1 and the user 2 receive the editing and modifying operation O1, the user 1 receives the same editing and modifying operation O1 as the one sent by the user 1, does not perform Transform conversion processing, updates the local operation version number to x +2, generates a new editing and modifying operation O2' by performing Transform conversion with the O2 after receiving the O1, updates the local operation version number to x +2, and simultaneously uploads the editing and modifying operation O2' to a WebSocket Service server through a WebSocket, because the version number of the O2' is x +2 which is the next version number of the latest version number x +1 of the document a, the O2' is put in storage, updates the latest version number of the document a to x +2, and simultaneously pushes the editing and modifying operation O2' to the browsers of the user 1 and the user 2 through the WebSocket, the user 1 updates the local content after receiving the O2', modifies the local document version number to x +3, and the user 2 does not update the local content after receiving the O2', but modifies the local document content to x +3; the local content in the end user 1 and user 2 browsers is the same;
in one embodiment, the synchronization comprises that the document editing content is automatically saved to the cloud end without being manually saved, so that the file content is prevented from being lost due to misoperation of power failure;
in one embodiment, the permission operations include creating a text file, deleting a file, moving a file, uploading a file, creating a folder, and renaming a file.
The synchronization module 4 is configured to perform synchronization cooperation at the user side according to the cooperation permission;
in one embodiment, the synchronous collaboration includes synchronizing project document uploads, synchronizing new project documents, synchronizing project document deletions, and synchronizing project document content;
in specific application, the user side is a WEB side in the mobile terminal, or WEB sides on a desktop computer and a notebook computer, and the cooperative content is synchronously stored to the cloud end and then synchronously transmitted to the client sides of all collaborators in real time.
The historical version module 5 is used for checking and rolling back historical versions;
in specific application, the version is saved, the history modification record is played back, and when the history version is backed, the content of the project document is in an editable state;
the project creator can save the version at any editing time, the saved version forms a history version record, the creator can view the project document content of any history version, and can also rollback the document content to any history version, and the operation of rolling back a certain history version is used as the latest history record item.
According to another embodiment of the present invention, as shown in fig. 5, the architecture implementation method of the multi-person online collaboration system comprises the following steps:
the system is realized by adopting a layered architecture, the front end and the rear end are separated, the front end adopts a Vue framework, the rear Gateway service Gateway adopts stateless service realized by a Django framework, the Gateway supports transverse capacity expansion and improves service carrying capacity, and the Gateway comprises but is not limited to a project generation module and an authority module; the back-end WebSocket Service realizes the multi-person cooperation function and simultaneously supports transverse capacity expansion to improve the Service carrying capacity, and comprises but is not limited to a synchronization module. The basic service comprises an HDFS distributed file system, a distributed cache, a non-relational MongoDB database and a MySql database cluster; HDFS distributed file systems are mainly used to store non-text data, such as pictures; the distributed cache is used as a cache layer for accessing the database, so that frequent access to the database is avoided, and the access pressure of the database is reduced; users can use the system to jointly create content only through a browser.
Wherein the above fig. 5 and the terms appearing in the above are explained as follows:
the Web Front is the development and design of a Front-end page;
vue is a set of responsive JavaScript development libraries;
nginx is an external server, and an external browser accesses the Nginx through url;
uWSGI is an internal server, mainly used for processing dynamic requests;
gateway is Gateway program;
the HDFS Cluster is a distributed file system Cluster and is a special data storage server;
the Cache Cluster is a Cache Cluster;
MySQL Cluster is a relational database Cluster;
MongoDB Cluster is a Key-Value type database Cluster;
the WebSocket Service is a Service for realizing a WebSocket protocol.
In summary, by means of the above technical solution of the present invention, the OT algorithm is adopted to obtain the modified version of the document in real time, and the two-way communication is performed between the server and the web socket protocol in real time to record and synchronize the modification of the file, so that all the historical version modification records of the document can be checked, and the editing content at any previous time can be returned; in the aspect of service architecture design, as the key service components support horizontal capacity expansion, the simultaneous online of tens of thousands of people can be realized, and as the redundancy design of storage is adopted, the safety of data can be ensured, and the latest state of project documents can be synchronized to a user side in real time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multi-user online real-time collaborative editing system is characterized by comprising a login registration module, a project creation module, a text file creation module, a document sharing module and collaborative editing;
the login registration module is used for knowing the user identity participating in the project collaborative editing;
the project creating module is used for creating projects by a creator and sharing the projects to other users;
the permission module is used for setting the cooperation permission when the document is shared;
the synchronization module is used for performing synchronous cooperation at the user side according to the cooperation authority;
and the historical version module is used for viewing and rolling back the historical version.
2. The system of claim 1, wherein the user identity comprises a user ID and a user name.
3. The system of claim 1, wherein the project comprises a file directory tree structure of a plurality of files;
wherein the files include text files and non-text files.
4. The multi-user online real-time collaborative editing system according to claim 3, wherein the text files include product white paper, product requirement specification, pushed soft text, design document, and document that requires team to collaboratively edit at the same time and different places.
5. The multi-user online real-time collaborative editing system according to claim 3, wherein the project sharing includes sending a project sharing link address to other users or project creators to directly add other users;
if the project sharing is successful, the other users are called collaborators.
6. The system of claim 1, wherein the step of setting collaboration rights when sharing the document further comprises:
setting different authority operations, wherein other people only have reading authority and do not modify the authority;
wherein, the authority of the collaborators can only be provided by the creator;
when the front-end editor edits the content, the content is edited in a multi-person cooperation mode, the OT algorithm is used for obtaining the operation of modifying the content of the document in real time, and the content edited in the multi-person cooperation mode is synchronously stored to the cloud in real time.
7. The multi-person online real-time collaborative editing system according to claim 6, wherein the OT algorithm comprises the steps of:
describing modification of document data;
the modification of the document content is in two-way communication with the server through a WebSocket protocol;
modifications to the document content are recorded and synchronized.
8. The multi-user online real-time collaborative editing system according to claim 7, wherein the synchronization includes that document editing contents are automatically saved to a cloud without manual saving, thereby avoiding file content loss caused by power failure misoperation.
9. The system of claim 6, wherein the permission operations include creating text files, deleting files, moving files, uploading files, creating folders, and renaming files.
10. The system of claim 1, wherein the synchronized collaboration comprises synchronized project document uploading, synchronized new project document creation, synchronized project document deletion, and synchronized project document content.
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