CN111191257A - File preview processing method and device - Google Patents
File preview processing method and device Download PDFInfo
- Publication number
- CN111191257A CN111191257A CN201911216375.0A CN201911216375A CN111191257A CN 111191257 A CN111191257 A CN 111191257A CN 201911216375 A CN201911216375 A CN 201911216375A CN 111191257 A CN111191257 A CN 111191257A
- Authority
- CN
- China
- Prior art keywords
- file
- information
- target
- terminal
- user
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/604—Tools and structures for managing or administering access control systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2141—Access rights, e.g. capability lists, access control lists, access tables, access matrices
Abstract
The embodiment of the invention provides a file preview processing method and a device, wherein the file preview processing method comprises the steps of receiving a file preview request sent by a terminal and acquiring browsing permission information of a user corresponding to the terminal; acquiring a corresponding original file according to the file preview request; generating a target file from the original file according to the file data adaptive to the browsing authority information; and sending the target file to the terminal. The embodiment of the invention realizes the control of the user on the file browsing authority and the safe browsing mode that the file does not fall to the ground, and is beneficial to protecting the core information of the file.
Description
Technical Field
The present invention relates to the field of computer technology application, and in particular, to a method and an apparatus for processing a preview of a file.
Background
Due to the increasing demands for office informatization and mobile office, particularly when some examination and approval review processes are involved, the mobile terminal examination and approval and document online preview functions become an indispensable part, but the existing methods have some limitations in the aspects of file floor control, cross-platform online preview, ultra-large file preview, fine-grained authority control and the like.
The current cross-platform online preview function generally downloads a remote file to a local processing front end, and is opened through third-party software or previewed and checked through a locally supported plug-in function; no matter which user role is, as long as the user role has the downloading authority of the file, the whole file can be downloaded, and all information of the file can be previewed and checked, so that the protection of the core information of the file is not facilitated; and the file original needs to fall to the local storage completely, causes and can directly take the file original from the front end storage through technical means, perhaps catches the problem of package through the interception, still can cause the problem that steal in the file transmission network communication of front and back end and catch the file original, has serious information leakage risk.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a method for previewing a document and a corresponding apparatus for previewing a document that overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present invention discloses a method for processing a preview of a file, including:
receiving a file preview request sent by a terminal, and acquiring browsing permission information of a user corresponding to the terminal;
acquiring a corresponding original file according to the file preview request;
generating a target file from the original file according to the file data adaptive to the browsing authority information;
and sending the target file to the terminal. Optionally, the file preview request includes user information; the acquiring of the browsing permission information of the user corresponding to the terminal includes:
when the user information comprises the browsing permission information, acquiring the browsing permission information of a user corresponding to the terminal from the user information;
or when the user information does not include the browsing permission information, acquiring the browsing permission information matched with the user information from preset browsing permission information.
Optionally, the file preview request includes file identification information; the original file is an original file corresponding to the file identification information; generating a target file from the original file according to the file data adapted to the browsing permission information, wherein the generating of the target file comprises:
converting the file format of the original file into a first target format to generate an intermediate file;
acquiring an accessible page matched with the browsing permission information from the intermediate file;
and generating the target file according to the accessible page.
Optionally, the generating the target file according to the accessible page includes:
acquiring a specified page matched with the browsing permission information from the accessible page;
generating a temporary file in a second target format by adopting the designated page;
and arranging the temporary files in sequence, and converting the file format of the temporary files into the first target format to obtain the target files.
Optionally, the generating a temporary file in a second target format by using the specified page includes:
converting the file format of the designated page into a second target format to obtain a temporary file;
acquiring watermark information; the watermark information comprises binary stream watermark information;
and embedding the binary stream watermark information in the temporary file of the second target format.
Optionally, the file preview request sent by the receiving terminal includes:
and receiving a file preview request which is generated and sent by calling a preset cross-platform browsing component by the terminal, wherein the cross-platform browsing component supports terminals of various platforms.
Optionally, the sending the target file to the terminal includes:
sending the target file adapted to the browsing permission information of the user corresponding to the terminal; the terminal is used for storing the target file into a memory, displaying the target file stored in the memory, and closing and displaying the target file and deleting the target file in the memory when closing operation aiming at the target file is detected.
An embodiment of the present invention further provides a device for processing preview of a file, including:
the preview request receiving module is used for receiving a file preview request sent by a terminal;
the permission information acquisition module is used for acquiring the browsing permission information of the user corresponding to the terminal;
the original file acquisition module is used for acquiring a corresponding original file according to the file preview request;
the target file generation module is used for generating a target file from the original file according to the file data adaptive to the browsing permission information;
and the target file sending module is used for sending the target file to the terminal.
Optionally, the preview request receiving module includes:
the preview request receiving submodule is used for receiving a file preview request generated and sent by a terminal calling a preset cross-platform browsing component; the cross-platform browsing component supports terminals of multiple platforms.
Optionally, the permission information obtaining module includes:
the permission information sub-acquisition module is used for acquiring the browsing permission information of the user corresponding to the terminal from the user information when the user information comprises the browsing permission information;
and the permission information sub-acquisition module is further used for or when the user information does not include the browsing permission information, acquiring the browsing permission information matched with the user information from preset browsing permission information.
Optionally, the file preview request includes file identification information; the original file acquisition module comprises:
the original file obtaining submodule is used for obtaining a corresponding original file according to the file identification information;
optionally, the target file generating module includes:
the intermediate file generation submodule is used for converting the file format of the original file into a first target format and generating an intermediate file;
the accessible page acquisition sub-module is used for acquiring the accessible page matched with the browsing permission information from the intermediate file;
and the target file generation submodule is used for generating the target file according to the accessible page.
Optionally, the target file generating sub-module includes:
a designated page obtaining unit, configured to obtain, from the accessible page, a designated page adapted to the browsing permission information;
the temporary file generating unit is used for generating a temporary file in a second target format by adopting the specified page;
and the target file generating unit is used for arranging the temporary files in sequence and converting the file format of the temporary files into the first target format to obtain the target files.
Optionally, the temporary file generating unit includes:
the format conversion subunit is used for converting the file format of the specified page into a second target format to obtain a temporary file;
the watermark information acquisition subunit is used for acquiring watermark information; the watermark information comprises binary stream watermark information;
the temporary file generating subunit is configured to embed the binary stream watermark information in the first temporary file of the temporary file in the second target format.
Optionally, the target file sending module includes:
the target file sending submodule is used for sending the target file which is adaptive to the browsing permission information of the user corresponding to the terminal; the terminal is used for storing the target file into a memory, displaying the target file stored in the memory, and closing and displaying the target file and deleting the target file in the memory when closing operation aiming at the target file is detected.
An embodiment of the present invention further provides an electronic device, including:
the file preview processing device comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the computer program realizes the file preview processing method when being executed by the processor.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when being executed by a processor, the computer program realizes the file preview processing method.
The embodiment of the invention has the following advantages:
the embodiment of the invention provides a file preview processing method and device, wherein a file preview request sent by a terminal is received through a cross-platform browsing tool, and an original file is obtained through the file preview request; acquiring browsing authority information of a preview user corresponding to a terminal, and generating a target file from an original file through file data adapted to the browsing authority information; finally, the generated target file is returned to the terminal, a preview user corresponding to the terminal can only check the target file but cannot check the original file, and the target file is a file adaptive to the browsing authority of the preview user, namely, the fine-grained control on different role authorities of the same file as required; the method realizes the safe browsing processing mode of controlling the file browsing authority of the user and preventing the original file from falling to the ground.
Drawings
FIG. 1 is a flowchart illustrating the steps of a method for previewing documents according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first embodiment of a method for processing a preview of a document according to the present invention;
FIG. 3 is a flowchart illustrating steps of a second embodiment of a method for processing a preview of a document according to the present invention;
FIG. 4 is a process flow diagram of a preview and processing embodiment of a file of the present invention;
FIG. 5 is a block diagram of a preview processing apparatus for a document according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment of the invention provides a method and a device which are respectively applied to a terminal side and a server side. The embodiment of the invention provides a file previewing method and device, which are applied to a terminal, wherein the terminal is communicated with a connected server; the preview processing method and device of the file are also provided, and are applied to a server which is communicated with a connected terminal.
It should be noted that, in a specific implementation, the embodiment of the present invention may be applied to a mobile terminal, for example, a mobile phone, a tablet computer, a personal digital assistant, a wearable device (such as glasses, a watch, and the like), and the like; the operating system of the mobile terminal may include Android (Android), IOS, Windows Phone, Windows, and the like.
Referring to fig. 1, a flowchart illustrating steps of an embodiment of a file previewing method according to the present invention is shown, where the method is applied to a terminal, and the terminal communicates with a connected server, and specifically includes the following steps:
in an embodiment of the present invention, a terminal applied by the method may be a mobile terminal, an operating system of the mobile terminal may be Android and IOS, and the terminal may call a preset cross-platform browsing component in a Web application using a browser, where the preset cross-platform browsing component may be a cross-platform PDF browsing tool PDFViewer written by using JavaScript. It should be noted that the cross-platform PDF browsing tool PDFViewer uses a WebNative architecture, and the architecture can realize that two clients of one code can both be resolved into native pages, that is, the browser, the Android and the iOS can be used in multiple places only by one development, thereby greatly reducing the development cost.
In the terminal, a file preview request can be generated, and the generated file preview request can include parameters such as file identification information and user information of a preview user; the generated file preview request may be sent to a connected server to request a preview of a certain file.
102, receiving the target file returned by the server in response to the file preview request, and storing the target file in a memory; the target file is adapted to the browsing permission information of the user corresponding to the terminal;
in an embodiment of the present invention, the terminal receives the processed file sent by the connected server, and can store the processed file in its memory, that is, the processed file does not need to be cached in the terminal, which can effectively limit possible leakage and theft of the file in the online preview process. It should be noted that the processed file may be a file adapted to the browsing permission information of the preview user, that is, the preview file is related to the browsing permission of the preview user, the found file before processing is not cached in the floor of the terminal, the terminal can only view the processed file, and the processed file is only stored in the memory.
in an embodiment of the present invention, since the processed file is stored in the memory, the terminal does not need to read the processed file from the cache space, and can directly open and display the processed file stored in the memory to the previewing user.
And 104, when closing operation aiming at the target file is detected, closing and displaying the target file and deleting the target file in the memory.
In an embodiment of the present invention, when a closing operation of a user on a processed file is detected, the data related to the processed file may be deleted immediately when the user closes the display, that is, a browsing manner in which the file does not fall to the ground for caching may be adopted, so as to prevent the risk of file leakage caused by exporting the residual historical data by using a technical means.
In the file previewing method in the embodiment of the invention, a terminal previews a file by using a cross-platform browsing tool, and generates and sends a file previewing request to a connected server, wherein the file previewing request comprises parameters such as file identification information and user information of a previewing user; and receiving a file adaptive to the browsing permission information of the preview user, caching the file in a memory, directly opening the display file, and immediately deleting the related information of the file in the memory when the file is closed. The file previewing method realizes compatibility of cross-platform browsing, control of a user on file browsing permission and a safe file browsing mode without falling to the ground.
Referring to fig. 2, a flowchart of a first embodiment of a method for processing a preview of a file according to the present invention is shown, where the method is applied to a server, and the server communicates with a connected terminal; the method specifically comprises the following steps:
the server can receive a file preview request sent by a terminal connected with the server, wherein the file preview request comprises parameters such as file identification information, user information of a preview user and the like; the server can also acquire the browsing authority information of the previewing user corresponding to the connected terminal, and the server can acquire and process the file requested to be previewed by the previewing user through the received file previewing request and the acquired browsing authority information.
In one embodiment of the invention, a server acquires a file which needs to be previewed by a user by receiving a file previewing request sent by a connected terminal, wherein the file previewing request comprises parameters such as file identification information and user information of a previewing user; the server can search an original file which needs to be previewed by a previewing user according to the file identification information, and check the authority of the searched file according to file previewing authority information in the user information of the previewing user, wherein the file previewing authority information can comprise the previewing authority of the previewing user to a certain file requested to be previewed; and after authentication, processing the searched file according to the browsing authority information in the user information or the local browsing authority information of the preview user at the terminal, wherein the preview user with authority can preview the searched and processed file.
in an embodiment of the present invention, the received file preview request includes parameters such as file identification information and user information of a preview user, and the server may search an original file that needs to be previewed by the preview user according to the file identification information, and check the permission of the searched original file according to file preview permission information in the user information of the preview user, and the preview user with permission may obtain the searched original file; after the original file is authenticated according to the file identification information and the file preview information, the searched original file can be taken back to the server side from the cache server or the file server.
in an embodiment of the present invention, the original file of the server may be retrieved through the file identification information and the user information, and at this time, the server may generate adapted file data according to the browsing permission information of the preview user, and generate a file that is finally returned to the terminal by the server from the original file, that is, a target file, according to the adapted file data.
And step 204, sending the target file to the terminal.
In an embodiment of the invention, the server side can process the original file through the browsing permission information of the preview user corresponding to the connected terminal, and return the processed file to the connected terminal, and the terminal is displayed for the preview user to view.
According to the file preview processing method provided by the embodiment of the invention, the server receives the file preview request and the browsing authority information of the preview user corresponding to the connected terminal, processes the file requested to be previewed by the preview user according to the browsing authority information, and returns the processed file to the preview user of the connected terminal for viewing, namely the preview user can only view the file information related to the browsing authority of the preview user, so that a safe file browsing and processing mode is realized, and the core information of the file is protected.
Referring to fig. 3, a flowchart illustrating steps of a second embodiment of a file preview processing method according to the present invention is shown, which may specifically include the following steps:
in an embodiment of the present invention, a server may receive a file preview request sent by a connected terminal, where the file preview request includes parameters such as file identification information and user information of a preview user; and responding to a request of a preview user corresponding to the connected terminal for previewing a certain file by receiving the file preview request. Step 301 may include the following sub-steps:
substep S11, the receiving terminal calls the preset cross-platform browsing component to generate and send a file preview request; the cross-platform browsing component supports terminals of multiple platforms.
The method comprises the steps that a server receives a file preview request sent by a connected terminal, wherein the connected terminal can be a mobile terminal, and an operating system of the mobile terminal can be Android and IOS; the file preview request of the connected terminal can be generated and sent by calling a preset cross-platform browsing component; the cross-platform browsing component can support terminals of multiple platforms.
In an embodiment of the present invention, the connected terminal may invoke a preset cross-platform browsing component in a Web application using a browser, where the preset cross-platform browsing component may be a cross-platform PDF browsing tool PDFViewer written by using JavaScript. It should be noted that the cross-platform PDF browsing tool PDFViewer uses a WebNative architecture, and the architecture can realize that two clients of one code can both be resolved into native pages, that is, three platforms of browser, Android and iOS can be used in multiple places only by one development, thereby greatly reducing the development cost and realizing cross-platform browsing.
the server may further obtain browsing permission information of a previewing user corresponding to the connected terminal, where the browsing permission information may include a permission of the previewing user to refine a document requested to be previewed to a page, that is, a permission of the previewing user to an accessible page in the document content.
In one embodiment of the present invention, step 302 may include the following sub-steps:
substep S21, when the user information includes the browsing right information, obtaining the browsing right information of the user corresponding to the terminal from the user information;
in an embodiment of the present invention, when the server obtains the browsing permission information of the preview user from the connected terminal, in one case, the browsing permission information may be obtained through a file preview request sent by the connected terminal. Because the file preview request can include parameters such as file identification information and user information, when the user information can include browsing permission information of the preview user, the server can acquire the browsing permission information of the preview user corresponding to the terminal connected with the server from the user information.
And a substep S22, or when the user information does not include the browsing right information, obtaining the browsing right information matched with the user information from preset browsing right information.
In an embodiment of the present invention, when the server obtains the browsing right information of the preview user from the terminal connected to the server, in another case, the browsing right information may be obtained locally through the connected terminal. When the user information in the file preview request sent by the connected terminal does not include the browsing permission information of the preview user, because a plurality of browsing permission information can exist locally in the terminal connected with the terminal and are matched with the user information of a plurality of preview users through the user identification, at this time, the server can obtain the browsing permission information which is the same as the user identification of the user information from the plurality of browsing permission information locally in the connected terminal.
the received file preview request comprises parameters such as file identification information and user information of a preview user, the server can search an original file which needs to be previewed by the preview user according to the file identification information, the authority of the searched original file is checked according to file preview authority information in the user information of the preview user, and the preview user with the authority can acquire the searched original file; after the original file is authenticated according to the file identification information and the file preview authority information, the searched original file can be taken back to the server side from the cache server or the file server.
In one embodiment of the present invention, step 303 may include the following sub-steps:
a substep S31, the file preview request including file identification information; acquiring a corresponding original file according to the file identification information;
in an embodiment of the present invention, the server may search for a file through file identification information sent by the connected terminal, authenticate the searched file according to file preview permission information in the user information of the preview user, and retrieve the searched file to the server side when the authentication result is that the file has permission.
the original file of the server can be retrieved through the file identification information and the file preview authority information in the user information, at this time, the server can generate adaptive file data according to the browsing authority information, and generate a file, namely a target file, which is finally returned to the connected terminal by the server from the original file according to the adaptive file data.
In one embodiment of the present invention, step 304 may include the following sub-steps:
substep S41, converting the file format of the original file into a first target format, and generating an intermediate file;
the server side can firstly perform format conversion operation on the retrieved original file, and uniformly convert the format of the original file with the compatible format into the file with the same format, namely, the file format of the original file is converted into the first target format.
In an embodiment of the present invention, the first target format may be a PDF format, that is, the same format that is uniformly converted may be a PDF format, and then original files that are not in the PDF format are all converted into files in the PDF format, and the original files that are converted into the PDF format are intermediate files, and the intermediate files are stored in the cache server.
The file formats supported by the file format conversion service may include, but are not limited to, 130 compatible file formats:
"abw", "zabw", "swf", "pmd", "pm3", "pm4", "pm5", "pm6", "p65", "cwk", "ase", "agd", "fhd", "kth", "key", "numbers", "pages", "pdb", "dxf", "bmp", "csv", "txt", "", "cdr", "cmx", "cgm", "dif", "dbf", "xml", "eps", "emf", "epub", "fb2", "gpl", "gnm", "gnumeri", "gif", "hwp", "plt", "html", "htm", "jtd", "jtt", "jpeg", "wpk 1", "wks", "pg123", "wk3", "wk4", "pct", "mml", "met", "xls", "xlw", "xlt", "xlsxlsx", "iqy", "doppx", "pppx", "pppsx", "pppsp", "ppxt", "ppxl", "ppxp", "" phb ",26", "pot", "pub", "rtf", "doc", "dot", "wps", "wdb", "wri", "vsd", "pgm", "pbm", "ppm", "odt", "fodt", "ods", "fos", "pods", "odp", "fodp", "odg", "fodg", "odf", "odb", "sx w", "stw", "sxc", "stc", "sxi", "sti", "sxd", "std", "sxm", "pcx", "pcd", "psd", "pdf", "png", "qxp", "wb2", "wq1", "wq2", "svg", "sgv", "602", "sdc", "vor", "sda", "sdd", "sdp", "sdw", "sgl", "sgf", "rlf", "ras", "svm", "slk", "tif", "tiff", "tfa", "uof", "uot", "uos", "39uff wpd", "xbm", "xpm", "zmf", and the like. The embodiment of the invention is compatible with, but not limited to, the checking of the files in the 130 formats, and the high compatibility brings high usability, so that a user can complete work conveniently.
Substep S42, obtaining an accessible page matched with the browsing permission information from the intermediate file;
the intermediate file in the PDF format is acquired from the cache server, and the browsing right information of the previewing user may include a right of the previewing user to refine a certain file requested to be previewed to a page, that is, a right of the previewing user to an accessible page in the file content, at this time, the accessible page in the PDF format of the previewing user may be extracted from the intermediate file in the PDF format according to the browsing right information.
In an embodiment of the present invention, the method for extracting and previewing the accessible page of the user according to the browsing permission information can be implemented by fine-grained permission management, that is, using a permission minimization principle. The fine-grained authority management is authority management at a data level, for example, a preview user needs to preview a certain file, and the preview user has preview authority for the file requested to be previewed.
The permission management method may be implemented by using a RBAC (Role-Based Access Control, which supports a minimum permission principle), that is, browsing permission information of a preview user may include user Role permission information of the preview user, and a page permitted to be accessed according to the user Role permission is extracted according to the user Role permission information, that is, an accessible page of the preview user is extracted. It should be noted that different pages accessible by different preview users are different, that is, different user permissions may obtain different pages for viewing the same file. The embodiment of the invention can adopt strict safety measures and fine-grained authority control, people with different roles in the same file see different contents, and the higher the general authority is, the more contents can be viewed, the more core information is related; the method effectively prevents the file from being possibly leaked and stolen in the online previewing process.
And a substep S43 of generating the target file according to the accessible page.
And extracting the accessible page in the PDF format from the intermediate file, further processing the accessible page by the server according to the browsing authority information of the preview user, and generating a file which is finally returned to the terminal, namely a target file.
In one embodiment of the present invention, the sub-step S43 may include the following sub-steps:
substep S431, obtaining a designated page adapted to the browsing permission information from the accessible page;
in an embodiment of the present invention, the server may obtain the page requirement accessed by the preview user according to the preview file request and the browsing permission information of the preview user sent by the terminal connected to the server, that is, may obtain the specified page in the PDF format that the user needs to access from the accessible page in the PDF format of the preview user. It should be noted that different pages that can be extracted by different preview users are different, that is, different pages may be obtained for viewing by different user rights of the same file.
The processing method for extracting the designated page from the file can reduce the waiting time of a user to the maximum extent in the file access, and in one embodiment of the invention, the processing method can be applied to the access of a super-large file, for example, a 100M-sized original file with about 5000 pages exists, the 100M-sized accessible page with about 5000 pages is obtained in the original file according to the browsing permission information of a previewing user, and the last page (namely, 5000 th page) of the accessible page is previewed by the previewing user, at this time, the file does not need to be downloaded locally and opened to the last page for viewing, the 5000 th page can be used as the designated page of the previewing user, the 5000 th page of the accessible page with about 5000 pages in the size of 100M is directly extracted, and the 5000 th page in the super-large file can be rapidly viewed within 1 second. The processing method for extracting the designated page has the advantages that the requirements of delay and file viewing efficiency brought by the processing method for extracting the designated page are met, under the condition that the safety control processing flow is ensured, the processing process is accelerated by utilizing various optimization modes, the waiting time of a user is reduced to the maximum extent, and the quick access capability of an ultra-large file is provided; the opening rendering of the file is completed at the server, the opening speed and the user browsing experience can depend on the server, and the opening speed of the super-large file is accelerated.
Substep S432, adopting the designated page to generate a temporary file in a second target format;
the server may extract the specified page in PDF format, further process the specified page, and generate a temporary file in a second target format.
In one embodiment of the present invention, the sub-step S432 may include the following sub-steps:
substep S4321, converting the file format of the specified page into a second target format to obtain a temporary file;
in an embodiment of the present invention, the server may convert the extracted specified page in the PDF format into a second target format, where the second target format may be a PPM (Portable Pixelmap, a LINUX picture format, and the storage format may be ASCII code or binary) picture format file, that is, the specified page converted into the PPM format is the first temporary file. The format of the first temporary file can be a PPM picture format, the PPM picture format can prevent copying of page characters and use of a tool for converting PDF into WORD, and the server end can adaptively reduce the sampling rate according to the requirement of a terminal connected with the server end on precision pixels in the conversion process, namely, the first temporary file is properly blurred; performance is improved by reducing the single page resolution, while appropriate blurring can prevent OCR (Optical character recognition) to some extent.
Substep S4322, acquiring watermark information; the watermark information comprises binary stream watermark information;
in an embodiment of the present invention, the server may process the temporary file in the PPM format, and at this time, may obtain the watermark information added to the temporary file in the PPM format, where the content of the watermark information may be formed by splicing and fixing the user information of the preview user and the dynamic information such as the timestamp, that is, the watermark information is the dynamic information; it should be noted that the obtained watermark information may be an explicit watermark in a picture format added to the picture, or may be binary stream watermark information, which may be embedded in the picture and exist as an implicit watermark.
Sub-step S4323, embedding the binary stream watermark information in the temporary file of the second target format.
In an embodiment of the present invention, the server may add or embed the acquired watermark information in a temporary file in a PPM format.
In one case, the server end can add watermark information to the temporary file in the PPM format, the watermark information is in the picture format, the size of the watermark font, the placement position, the density and other information can be automatically calculated according to the size proportion information of the temporary file in the PPM format, and the watermarks of the files with different sizes can be guaranteed to have a uniform visual effect; in another case, the server can embed the watermark information into a temporary file in a PPM format, the watermark information is binary stream information at the time, an interface can be reserved, the added watermark information in the picture format is converted into binary embedded watermark information, and the binary embedded watermark information is restored into a picture to generate an implicit watermark, so that if the file is leaked, if the explicit watermark is removed by a technical means, tracing is performed.
And a substep S433 of arranging the temporary files in sequence and converting the file format of the temporary files into the first target format to obtain the target files.
The server side can arrange the temporary files with watermark information in PPM format according to the page number sequence; and the temporary files in the PPM format formed by arrangement can be converted into a first target format to obtain a processed file, namely a target file, which is finally returned to the terminal.
In an embodiment of the present invention, the first target format may be a PDF format, and the server may load a PPM-format file into a PDF-format page according to the number of permutations, and reorganize the new PDF-format page to generate a new PDF-format file, where the new PDF-format file is a file that is finally returned to the terminal, that is, a target file.
The server side can acquire the adapted original file through a file preview request sent by the connected terminal, process the original file according to the browsing permission information of the preview user, return the processed file to the connected terminal, and display the terminal for the preview user to check.
In one embodiment of the present invention, step 305 may include the following sub-steps:
substep S51, sending the target file adapted to the browsing permission information of the user corresponding to the terminal; the terminal is used for storing the target file into a memory, displaying the target file stored in the memory, and closing and displaying the target file and deleting the target file in the memory when closing operation aiming at the target file is detected.
And the server can send the file processed according to the browsing permission information to the connected terminal through the cross-platform browsing tool so as to facilitate the preview user corresponding to the connected terminal to view.
In an embodiment of the present invention, the connected terminal may receive a processed file sent by the server, and may store the processed file in its memory, where the processed file is a file related to the browsing permission of the preview user, that is, the connected terminal cannot perform landing caching on a file searched before being processed by the server, and the connected terminal can only view the processed file, and the processed file is only stored in the memory, that is, a browsing manner in which the original file is not cached in the landing mode may be adopted, which may effectively limit possible leakage and theft of the file in the online preview process.
The connected terminal stores the processed file in the memory, the processed file does not need to be read from the cache space, and the processed file stored in the memory can be directly opened and displayed to a previewing user; and when the closing operation of the preview user on the processed file is detected, the connected terminal can immediately delete the related data of the processed file when the user closes the displayed file, namely, a safe file browsing mode can be adopted, so that the risk of file leakage caused by the fact that the residual historical data is exported by using a technical means is prevented.
According to the file preview processing method provided by the embodiment of the invention, a server responds to a file preview request sent by a connected terminal and processes a file; obtaining an adapted original file according to a file preview request, uniformly converting the same format of a compatible format file according to browsing permission information of a preview user, wherein the browsing permission information can comprise user role permission information of the preview user, obtaining accessible pages of files in the same format according to the user role authority information, obtaining appointed pages of accessible pages according to the file preview request and the user role authority information, converting the file format of the appointed pages into files in picture format, adding or embedding watermark information to the file with the picture format according to the acquired watermark information, loading the file with the picture format and the watermark information in the original sequence to form a new PDF (Portable document Format) format file, and returning the new PDF format file to a terminal connected with the new PDF format file to finish the processing work of the file; the connected terminal can use a cross-platform browsing tool to preview a new PDF file returned by the server, the new PDF file is a file matched with the browsing authority information of a previewing user, the file is cached in a memory and directly opened and displayed, the related information of the file in the memory is immediately deleted when the file is closed, and the file previewing work is completed. The file preview processing method realizes multi-format file conversion, control of a user on file browsing permission, a file permission minimization principle, a safe processing mode of converting a picture format to prevent copying and dynamic display and hidden watermark processing, and realizes compatibility of cross-platform browsing, control of the user on the file browsing permission and a safe browsing mode of not falling to the ground of the file.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 4, a process flow diagram of a file preview and processing embodiment of the present invention is shown, where the process flow diagram includes a left block diagram and a right block diagram, where the left block diagram is a process of previewing a file by a terminal when a user previews the file; the right block shows the processing procedure of a file by a connected server when a user previews the file.
It should be noted that, in a specific implementation, the embodiment of the present invention may be applied to a mobile terminal, for example, a mobile phone, a tablet computer, a personal digital assistant, a wearable device (such as glasses, a watch, and the like), and the like; the operating system of the mobile terminal may include Android (Android), IOS, Windows Phone, Windows, and the like.
In an embodiment of the present invention, as shown in fig. 3, a user initiates a call to a previewed file through a terminal, at this time, the terminal (Android, iOS, browser) may initiate a call request for viewing the file through a cross-platform browsing tool, that is, a file preview request, where the file preview request includes parameters such as a file number (that is, file identification information) and user information, and the parameters are transmitted to a back-end server through the cross-platform browsing tool; the backend server may perform the following processing on the file in response to the request sent by the terminal:
the back-end server receives the file, at the moment, the server can check the authority according to the file number and the user information transmitted by the calling party, and then the server retrieves the file to the back end from the cache server or the file storage server;
the back-end server carries out format conversion processing, and at the moment, the server can uniformly convert the files with compatible formats into intermediate files with the same format;
the back-end server carries out page extraction processing, at the moment, the server can extract the appointed page in the intermediate file into a temporary file in a picture format according to the terminal calling parameter requirement and the page and page number requirements allowed to be accessed by the user role authority, and different pages which can be extracted by different users are different;
the back-end server performs watermarking processing, at the moment, the server can render watermarks on the temporary pictures, and the watermark content is dynamic information such as calling user information and timestamps and the like and is spliced and fixed watermark content generally;
the back-end server generates a file, and at the moment, the server can reorganize the temporary files after the watermarks are drawn in sequence to generate a PDF file serving as an output result to be returned to a terminal caller;
and after the back-end server generates a file which is finally returned to the terminal, namely the processed file, the terminal displays the file, at the moment, the terminal can store a new PDF file returned by the back-end in an internal memory by using a cross-platform PDF viewing tool, the new PDF file is directly displayed to the front-end information, and relevant data is immediately deleted once the display is closed.
In the embodiment of the invention, when a user previews a certain file, a terminal previews the file and processes the file by a server, so that the compatibility of cross-platform browsing is realized, the user controls the file browsing authority and a safe browsing mode that the file does not fall to the ground, multi-format file support is also realized, the user controls the file browsing authority, fine-grained control on different roles and authorities of the same file as required is realized, the super-large file is quickly accessed, and a picture format is converted to prevent copying and a safe processing mode of dynamic implicit watermark processing is realized for each call.
Referring to fig. 5, a block diagram illustrating a structure of an embodiment of a file preview processing apparatus according to the present invention may specifically include the following modules:
a preview request receiving module 501, configured to receive a file preview request sent by a terminal;
an authority information obtaining module 502, configured to obtain browsing authority information of a user corresponding to the terminal;
an original file obtaining module 503, configured to obtain a corresponding original file according to the file preview request;
a target file generating module 504, configured to generate a target file from the original file according to file data adapted to the browsing permission information;
and an object file sending module 505, configured to send the object file to the terminal.
In an embodiment of the present invention, the preview request receiving module 501 may include the following sub-modules:
the preview request receiving submodule is used for receiving a file preview request generated and sent by a terminal calling a preset cross-platform browsing component; the cross-platform browsing component supports terminals of multiple platforms.
In an embodiment of the present invention, the permission information obtaining module 502 may include the following sub-modules:
the permission information sub-acquisition module is used for acquiring the browsing permission information of the user corresponding to the terminal from the user information when the user information comprises the browsing permission information;
and the permission information sub-acquisition module is further used for or when the user information does not include the browsing permission information, acquiring the browsing permission information matched with the user information from preset browsing permission information.
In one embodiment of the present invention, the file preview request includes file identification information; the original file acquiring module 503 may include the following sub-modules:
the original file obtaining submodule is used for obtaining a corresponding original file according to the file identification information;
in one embodiment of the present invention, the target file generation module 504 may include the following sub-modules:
the intermediate file generation submodule is used for converting the file format of the original file into a first target format and generating an intermediate file;
the accessible page acquisition sub-module is used for acquiring the accessible page matched with the browsing permission information from the intermediate file;
and the target file generation submodule is used for generating the target file according to the accessible page.
In an embodiment of the present invention, the target file generation submodule may include the following units:
a designated page obtaining unit, configured to obtain, from the accessible page, a designated page adapted to the browsing permission information;
the temporary file generating unit is used for generating a temporary file in a second target format by adopting the specified page;
and the target file generating unit is used for arranging the temporary files in sequence and converting the file format of the temporary files into the first target format to obtain the target files.
In an embodiment of the present invention, the temporary file generating unit may include the following sub-units:
the format conversion subunit is used for converting the file format of the specified page into a second target format to obtain a temporary file;
the watermark information acquisition subunit is used for acquiring watermark information; the watermark information comprises binary stream watermark information;
the temporary file generating subunit is configured to embed the binary stream watermark information in the first temporary file of the temporary file in the second target format.
In one embodiment of the present invention, the target file sending module 505 may include the following sub-modules:
the target file sending submodule is used for sending the target file which is adaptive to the browsing permission information of the user corresponding to the terminal; the terminal is used for storing the target file into a memory, displaying the target file stored in the memory, and closing and displaying the target file and deleting the target file in the memory when closing operation aiming at the target file is detected.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
An embodiment of the present invention further provides an electronic device, including:
the file previewing processing method comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, when the computer program is executed by the processor, each process of the file previewing processing method embodiment is realized, the same technical effect can be achieved, and in order to avoid repetition, repeated description is omitted.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements each process of the above-mentioned embodiment of the file preview processing method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method and the device for processing the preview of the file provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A preview processing method of a file is characterized by comprising the following steps:
receiving a file preview request sent by a terminal, and acquiring browsing permission information of a user corresponding to the terminal;
acquiring a corresponding original file according to the file preview request;
generating a target file from the original file according to the file data adaptive to the browsing authority information;
and sending the target file to the terminal.
2. The method of claim 1, wherein the file preview request includes user information; the acquiring of the browsing permission information of the user corresponding to the terminal includes:
when the user information comprises the browsing permission information, acquiring the browsing permission information of a user corresponding to the terminal from the user information;
or when the user information does not include the browsing permission information, acquiring the browsing permission information matched with the user information from preset browsing permission information.
3. The method of claim 1, wherein the file preview request includes file identification information; the original file is an original file corresponding to the file identification information; generating a target file from the original file according to the file data adapted to the browsing permission information, wherein the generating of the target file comprises:
converting the file format of the original file into a first target format to generate an intermediate file;
acquiring an accessible page matched with the browsing permission information from the intermediate file;
and generating the target file according to the accessible page.
4. The method of claim 3, wherein the generating the target file from the accessible page comprises:
acquiring a specified page matched with the browsing permission information from the accessible page;
generating a temporary file in a second target format by adopting the designated page;
and arranging the temporary files in sequence, and converting the file format of the temporary files into the first target format to obtain the target files.
5. The method of claim 4, wherein generating a temporary file in a second target format using the specified page comprises:
converting the file format of the designated page into a second target format to obtain a temporary file;
acquiring watermark information; the watermark information comprises binary stream watermark information;
and embedding the binary stream watermark information in the temporary file of the second target format.
6. The method according to claim 1, wherein the receiving of the file preview request sent by the terminal comprises:
a receiving terminal calls a preset cross-platform browsing component to generate and send a file preview request; the cross-platform browsing component supports terminals of multiple platforms.
7. The method of claim 1, wherein the sending the target file to the terminal comprises:
sending the target file adapted to the browsing permission information of the user corresponding to the terminal; the terminal is used for storing the target file into a memory, displaying the target file stored in the memory, and closing and displaying the target file and deleting the target file in the memory when closing operation aiming at the target file is detected.
8. A preview processing apparatus for a document, comprising:
the preview request receiving module is used for receiving a file preview request sent by a terminal;
the permission information acquisition module is used for acquiring the browsing permission information of the user corresponding to the terminal;
the original file acquisition module is used for acquiring a corresponding original file according to the file preview request;
the target file generation module is used for generating a target file from the original file according to the file data adaptive to the browsing permission information;
and the target file sending module is used for sending the target file to the terminal.
9. An electronic device, comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing a method of preview processing of a document according to any of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements a preview processing method of a document according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216375.0A CN111191257A (en) | 2019-12-02 | 2019-12-02 | File preview processing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216375.0A CN111191257A (en) | 2019-12-02 | 2019-12-02 | File preview processing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111191257A true CN111191257A (en) | 2020-05-22 |
Family
ID=70709490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911216375.0A Pending CN111191257A (en) | 2019-12-02 | 2019-12-02 | File preview processing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111191257A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931096A (en) * | 2020-09-02 | 2020-11-13 | 平安国际智慧城市科技股份有限公司 | Method and device for previewing files on mobile terminal, computer equipment and storage medium |
| CN112529759A (en) * | 2020-12-22 | 2021-03-19 | 北京百度网讯科技有限公司 | Document processing method, device, equipment, storage medium and computer program product |
| CN112637635A (en) * | 2020-12-15 | 2021-04-09 | 西安万像电子科技有限公司 | File security method and system, computer readable storage medium and processor |
| CN113779953A (en) * | 2021-11-10 | 2021-12-10 | 航天宏图信息技术股份有限公司 | Automatic document generation method and system |
| CN113821771A (en) * | 2021-11-24 | 2021-12-21 | 天津联想协同科技有限公司 | Dynamic watermark adding method, device, network disk and storage medium |
| CN114218441A (en) * | 2021-11-22 | 2022-03-22 | 慧之安信息技术股份有限公司 | Method for calling and displaying UOF document |
| CN115114646A (en) * | 2022-08-25 | 2022-09-27 | 北京前沿信安科技股份有限公司 | File authority processing method and device and storage medium |
| CN117634430A (en) * | 2024-01-10 | 2024-03-01 | 广州市天奕信息技术股份有限公司 | File conversion method, system, equipment and storable medium |
| CN112529759B (en) * | 2020-12-22 | 2024-05-14 | 北京百度网讯科技有限公司 | Document processing method, apparatus, device, storage medium, and computer program product |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010218472A (en) * | 2009-03-19 | 2010-09-30 | Hitachi Software Eng Co Ltd | System and control method for browsing information |
| CN102710761A (en) * | 2012-05-24 | 2012-10-03 | 上海克而瑞信息技术有限公司 | PDF (portable document format) file online storage and access method |
| CN106777179A (en) * | 2016-12-22 | 2017-05-31 | 金蝶软件（中国）有限公司 | A kind of online method for previewing of document and system |
| CN108733811A (en) * | 2018-05-21 | 2018-11-02 | 努比亚技术有限公司 | A kind of file access method, terminal and computer readable storage medium |
| CN109446823A (en) * | 2018-09-30 | 2019-03-08 | 天津字节跳动科技有限公司 | Preview file method, apparatus, electronic equipment and readable storage medium storing program for executing |
| CN110413570A (en) * | 2019-06-25 | 2019-11-05 | 大唐软件技术股份有限公司 | A kind of document index and search method and its device |
-
2019
- 2019-12-02 CN CN201911216375.0A patent/CN111191257A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010218472A (en) * | 2009-03-19 | 2010-09-30 | Hitachi Software Eng Co Ltd | System and control method for browsing information |
| CN102710761A (en) * | 2012-05-24 | 2012-10-03 | 上海克而瑞信息技术有限公司 | PDF (portable document format) file online storage and access method |
| CN106777179A (en) * | 2016-12-22 | 2017-05-31 | 金蝶软件（中国）有限公司 | A kind of online method for previewing of document and system |
| CN108733811A (en) * | 2018-05-21 | 2018-11-02 | 努比亚技术有限公司 | A kind of file access method, terminal and computer readable storage medium |
| CN109446823A (en) * | 2018-09-30 | 2019-03-08 | 天津字节跳动科技有限公司 | Preview file method, apparatus, electronic equipment and readable storage medium storing program for executing |
| CN110413570A (en) * | 2019-06-25 | 2019-11-05 | 大唐软件技术股份有限公司 | A kind of document index and search method and its device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111931096A (en) * | 2020-09-02 | 2020-11-13 | 平安国际智慧城市科技股份有限公司 | Method and device for previewing files on mobile terminal, computer equipment and storage medium |
| CN112637635A (en) * | 2020-12-15 | 2021-04-09 | 西安万像电子科技有限公司 | File security method and system, computer readable storage medium and processor |
| CN112529759A (en) * | 2020-12-22 | 2021-03-19 | 北京百度网讯科技有限公司 | Document processing method, device, equipment, storage medium and computer program product |
| CN112529759B (en) * | 2020-12-22 | 2024-05-14 | 北京百度网讯科技有限公司 | Document processing method, apparatus, device, storage medium, and computer program product |
| CN113779953A (en) * | 2021-11-10 | 2021-12-10 | 航天宏图信息技术股份有限公司 | Automatic document generation method and system |
| CN114218441A (en) * | 2021-11-22 | 2022-03-22 | 慧之安信息技术股份有限公司 | Method for calling and displaying UOF document |
| CN113821771A (en) * | 2021-11-24 | 2021-12-21 | 天津联想协同科技有限公司 | Dynamic watermark adding method, device, network disk and storage medium |
| CN115114646A (en) * | 2022-08-25 | 2022-09-27 | 北京前沿信安科技股份有限公司 | File authority processing method and device and storage medium |
| CN115114646B (en) * | 2022-08-25 | 2023-01-03 | 北京前沿信安科技股份有限公司 | File authority processing method and device and storage medium |
| CN117634430A (en) * | 2024-01-10 | 2024-03-01 | 广州市天奕信息技术股份有限公司 | File conversion method, system, equipment and storable medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111191257A (en) | File preview processing method and device | |
| Thing et al. | Live memory forensics of mobile phones | |
| KR101605156B1 (en) | Device, method, and computer for providing file deleting service | |
| WO2016033333A1 (en) | Multi-mode protected content wrapper | |
| US20130262696A1 (en) | Proxy server apparatus, client terminal apparatus, remote access system, transfer control method, access method, and recording medium | |
| CN102970307B (en) | Cipher safety system and password safety method | |
| CN109891415B (en) | Securing a Web server for an unauthorized client application | |
| EP3066639B1 (en) | Method and device for image processing, and storage medium | |
| US20170168997A1 (en) | System and computer-implemented method for incorporating an image into a page of content for transmission from a web-site | |
| CN104933375A (en) | Method and system for protecting electronic display document | |
| US20230359687A1 (en) | Browser-based mobile image capture | |
| US8485428B1 (en) | Systems and methods for providing security information about quick response codes | |
| CN104023332A (en) | Electronic terminal and short message encrypting and decrypting method thereof | |
| CN103701756A (en) | Method and device for protecting web form data and web server | |
| CN114386059A (en) | Webpage text confusion anti-crawler method and device, electronic equipment and storage medium | |
| US20210042436A1 (en) | Data storage using image objects shown in a real-time view | |
| KR20070060657A (en) | Method for protecting user information in mobile communication terminal and device using the same and computer-readable medium having thereon a program performing function embodying the same | |
| US8464343B1 (en) | Systems and methods for providing security information about quick response codes | |
| WO2016188079A1 (en) | Data storage method for terminal device and terminal device | |
| CN103067367A (en) | Password hidden method and device and password retrieval method and device | |
| CN115277670A (en) | Network connection control method and device of target application and electronic equipment | |
| CN115361376A (en) | Government affair file uploading method and device, electronic equipment and storage medium | |
| CN111835706B (en) | Method and device for checking malicious extension of browser and computer equipment | |
| CN114048050A (en) | Data processing method and device, electronic equipment and computer readable storage medium | |
| EP3246843A1 (en) | Terminal contact management method, management device and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200522 |
|
| RJ01 | Rejection of invention patent application after publication |