CN113778680A - Document online preview method and system - Google Patents
Document online preview method and system Download PDFInfo
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- CN113778680A CN113778680A CN202111060311.3A CN202111060311A CN113778680A CN 113778680 A CN113778680 A CN 113778680A CN 202111060311 A CN202111060311 A CN 202111060311A CN 113778680 A CN113778680 A CN 113778680A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5011—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resources being hardware resources other than CPUs, Servers and Terminals
- G06F9/5016—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resources being hardware resources other than CPUs, Servers and Terminals the resource being the memory
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- 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
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- Computer Hardware Design (AREA)
- Human Computer Interaction (AREA)
- Document Processing Apparatus (AREA)
Abstract
The invention discloses a document online previewing method, which is realized based on a client and a server and comprises the following steps: s1, the client receives a document preview instruction of a user; s2, the client judges whether the document is in a supported document format, if so, the client loads a corresponding preview device, otherwise, the client terminates the program and prompts the user; s3, the client communicates to access the server to request to preview the document; s4, the server searches whether the converted preview document with the specified format corresponding to the document exists, if so, the document is directly transmitted to the client, otherwise, the server converts the document into the preview document with the specified format and then transmits the preview document to the client; and S5, the client analyzes the preview document and renders a display.
Description
Technical Field
The invention relates to the technical field of design information, in particular to a document online preview method and a document online preview system.
Background
Due to the development of internet technology, users want to open and preview documents (including but not limited to Word, spreadsheet, slide file, web page file, TXT text file) conveniently at various device terminals, and there are two main types of existing technical implementation manners:
1. the method for calling the third-party special program from the existing application program to open the document has the following problems:
(1) a user needs to download and install a special third-party special program on the equipment, the downloading and installation time is needed, and the additional storage space of the equipment is also occupied;
(2) after the third-party program is opened, the access authority of the document is exposed to the third-party program, and the user can perform additional storage and modification to cause uncontrollable document management authority;
(3) often, one special program can only open one or more documents, so that a user can preview a plurality of documents only by installing a plurality of third-party programs;
(4) when a user uses document preview on different devices (such as a mobile phone terminal and a computer terminal) and different operating systems (such as Mac, Windows, Android and iOS), different third-party application programs need to be installed according to the environment of a client, and troubles are caused to the user.
2. The method for previewing after converting the document into the bitmap file has the following problems:
(1) after the document is converted into the bitmap file, the character format is converted into the pixel format, and the occupied storage space is much larger than that of the original document;
(2) the time delay of network transmission is long due to the fact that the converted bitmap file is large, and the waiting time of a user is prolonged;
(3) the resolution of the bitmap file is fixed if the font and detail appear blurred under magnification;
(4) the characters in the bitmap file cannot be copied;
(5) the converted bitmap file is blurred when printed.
Disclosure of Invention
Aiming at the problem of the complaint, the invention provides a document online preview method and a document online preview system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a document online preview method is realized on the basis of a client and a server and comprises the following steps:
s1, the client receives a document preview instruction of a user;
s2, the client judges whether the document is in a supported document format, if so, the client loads a corresponding preview device, otherwise, the client terminates the program and prompts the user;
s3, the client communicates to access the server to request to preview the document;
s4, the server searches whether the converted preview document with the specified format corresponding to the document exists, if so, the document is directly transmitted to the client, otherwise, the server converts the document into the preview document with the specified format and then transmits the preview document to the client;
and S5, the client analyzes the preview document and renders a display.
Preferably, step S2 is specifically: and the client reads the format of the document which needs to be previewed currently through the suffix name of the document, compares the format with a document support format list stored by the client, judges whether the document is in a supported document format, if so, the client loads a corresponding previewing device, and otherwise, the client terminates the program and prompts a user.
Preferably, step S3 specifically includes:
s31, detecting the running environment of the current application by the client running environment detection instruction, and calling a document preview device corresponding to the running environment;
s32, the document previewing apparatus accesses the server through the network communication interface, and sends a request for previewing the document to the server.
Preferably, the runtime environment includes, but is not limited to, a web browser, an android operating system, an iOS operating system, a wechat H5 application environment, and a wechat applet environment.
Preferably, step S4 is specifically: the server receives a preview request, searches whether a preview document corresponding to the converted document exists in a memory according to main parameters of the request, if so, directly transmits the preview document to the client, otherwise, the server calls a document conversion device to convert the document into the preview document and store the preview document in the memory, and then transmits the preview document to the client.
Preferably, the main parameters of the preview request are a document resource address and a unique identifier of the document.
Preferably, step S5 is specifically: the client calls the document previewing device of the current application environment to render the previewed document and display the previewed document to a user, and according to the configuration parameters of the client, a semi-transparent character watermark can be dynamically loaded in a previewing page, wherein the content of the watermark is a dynamically-set character string parameter.
A document online preview system comprises a client and a server which are in communication connection, wherein the client comprises a user interaction interface, a client processor, a document preview device and a client communication interface, and the server comprises a server communication interface, a server processor and a memory;
the user interaction interface is used for realizing user interaction, and providing functions of opening and closing a window, operating a prompt, displaying a document content preview interface and the like;
the client processor is used for responding to user interaction, judging the application environment of the client and controlling the user interaction interface, the document preview device and the client communication interface;
the document previewing device can be used for processing document previewing requests in different application environments;
the client communication interface is used for sending a request to the server and receiving data transmitted back by the server;
the server communication interface is used for receiving the access request of the client and returning data;
the server processor is used for processing a document preview request of the client, controlling the logic of document conversion, and controlling the server communication interface and the memory;
the memory is used for storing data, original documents and preview documents after format conversion.
After adopting the technical scheme, compared with the background technology, the invention has the following advantages:
1. the invention provides a document online preview method and a document online preview system, and for various supported document formats, a user does not need to install a third-party special application program, so that the storage space of equipment and the running memory are reduced.
2. The invention provides a document online preview method and a document online preview system, wherein the document online preview is operated in an autonomous controllable environment, so that the exposure of the document reading and writing authority after a third-party application program opens a document can be avoided, and the watermarking and better authority control can be realized.
3. The invention provides a document online preview method and a document online preview system, which support various devices, including a mobile phone end, a tablet personal computer and a PC; the system can be operated under various common application environments, including an android client, an iOS client, a WeChat applet, a web browser and the like; the method can support various common document formats and is convenient for users to use.
4. Compared with a bitmap preview mode, the PDF file has smaller converted file capacity, higher transmission speed and clearer viewing and printing.
Drawings
FIG. 1 is a flow chart of the method steps of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the apparatus or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
Referring to fig. 1, the present invention discloses a document online preview method, which is implemented based on a client and a server, and includes the following steps:
s1, opening a link resource of a document by a user through a user interactive interface of the client, and receiving a preview instruction of the user by the client;
s2, the client reads the format of the current document to be previewed through the suffix name of the document, compares the format with the document support format list stored by the client, judges whether the document is in the supported document format, if so, the client loads the corresponding previewing device, otherwise, the client terminates the program and prompts the user through the user interaction interface;
and the latest document support format list is automatically downloaded from the server dynamically when the client is started.
S3, the client side communicates to access the server to request the preview document;
s31, detecting a running environment of the current application by a client running environment detection instruction, and calling a document preview device corresponding to the running environment;
the runtime environments include, but are not limited to, a web browser, an android operating system, an iOS operating system, a wechat H5 application environment, and a wechat applet environment.
S32, the document previewing device accesses the server through the network communication interface and sends a document previewing request to the server;
s4, the server receives the preview request, and searches whether the PDF document corresponding to the converted document exists in the memory according to the document resource address or the unique identification code, if so, the document is directly transmitted to the client, otherwise, the server calls the document conversion device to convert the document into the specified PDF document and then transmits the document to the client; if the previewed document is in the PDF file format, the document does not need to be converted again.
The document conversion device can output PDF documents of a single file or generate one PDF document per page according to configurable conversion parameters.
The PDF document transmitted by the server to the client via the communication interface may be a whole document or may be a PDF document sent per page.
And S5, the client calls a document preview device of the current application environment to analyze the PDF document, the PDF document is rendered and displayed to a user, and according to the configuration parameters of the client, the preview page can be dynamically loaded with the semitransparent character watermark, wherein the content of the watermark is the character string parameter which can be dynamically set.
A document online preview system comprises a client and a server which are in communication connection, wherein the client comprises a user interaction interface, a client processor, a document preview device and a client communication interface, and the server comprises a server communication interface, a server processor and a memory;
the user interaction interface is used for realizing user interaction, and providing functions of opening and closing a window, operating a prompt, displaying a document content preview interface and the like;
the client processor is used for responding to user interaction, judging the application environment of the client, and controlling a user interaction interface, a document preview device and a client communication interface;
the document previewing device can be used for processing document previewing requests under different application environments;
the client communication interface is used for sending a request to the server and receiving data transmitted back by the server;
the server communication interface is used for receiving an access request of the client and returning data;
the server processor is used for processing a document preview request of the client, controlling the logic of document conversion, controlling the communication interface of the server and the memory;
and the memory is used for storing the data, the original document and the preview document after the format conversion.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A document online preview method is realized on the basis of a client and a server and is characterized by comprising the following steps:
s1, the client receives a document preview instruction of a user;
s2, the client judges whether the document is in a supported document format, if so, the client loads a corresponding preview device, otherwise, the client terminates the program and prompts the user;
s3, the client communicates to access the server to request to preview the document;
s4, the server searches whether the converted preview document with the specified format corresponding to the document exists, if so, the document is directly transmitted to the client, otherwise, the server converts the document into the preview document with the specified format and then transmits the preview document to the client;
and S5, the client analyzes the preview document and renders a display.
2. The method for previewing the document on line according to claim 1, wherein the step S2 is specifically as follows: and the client reads the format of the document which needs to be previewed currently through the suffix name of the document, compares the format with a document support format list stored by the client, judges whether the document is in a supported document format, if so, the client loads a corresponding previewing device, and otherwise, the client terminates the program and prompts a user.
3. The method for previewing the document on line according to claim 1, wherein the step S3 specifically comprises:
s31, detecting the running environment of the current application by the client running environment detection instruction, and calling a document preview device corresponding to the running environment;
s32, the document previewing apparatus accesses the server through the network communication interface, and sends a request for previewing the document to the server.
4. A method for on-line previewing of a document according to claim 3, wherein: the runtime environments include, but are not limited to, a web browser, an android operating system, an iOS operating system, a wechat H5 application environment, and a wechat applet environment.
5. The method for previewing the document on line according to claim 1, wherein the step S4 is specifically as follows: the server receives a preview request, searches whether a preview document corresponding to the converted document exists in a memory according to main parameters of the request, if so, directly transmits the preview document to the client, otherwise, the server calls a document conversion device to convert the document into the preview document and store the preview document in the memory, and then transmits the preview document to the client.
6. The method for previewing the document on line according to claim 5, wherein: the main parameters of the preview request are a document resource address and a unique identifier of a document.
7. The method for previewing the document on line according to claim 3, wherein the step S5 is specifically as follows: the client calls the document previewing device of the current application environment to render the previewed document and display the previewed document to a user, and according to the configuration parameters of the client, a semi-transparent character watermark can be dynamically loaded in a previewing page, wherein the content of the watermark is a dynamically-set character string parameter.
8. A document online preview system according to any of claims 1 to 7, wherein: the system comprises a client and a server which are in communication connection, wherein the client comprises a user interaction interface, a client processor, a document previewing device and a client communication interface, and the server comprises a server communication interface, a server processor and a memory;
the user interaction interface is used for realizing user interaction, and providing functions of opening and closing a window, operating a prompt, displaying a document content preview interface and the like;
the client processor is used for responding to user interaction, judging the application environment of the client and controlling the user interaction interface, the document preview device and the client communication interface;
the document previewing device can be used for processing document previewing requests in different application environments;
the client communication interface is used for sending a request to the server and receiving data transmitted back by the server;
the server communication interface is used for receiving the access request of the client and returning data;
the server processor is used for processing a document preview request of the client, controlling the logic of document conversion, and controlling the server communication interface and the memory;
the memory is used for storing data, original documents and preview documents after format conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060311.3A CN113778680A (en) | 2021-09-10 | 2021-09-10 | Document online preview method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060311.3A CN113778680A (en) | 2021-09-10 | 2021-09-10 | Document online preview method and system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160224517A1 (en) * | 2015-01-29 | 2016-08-04 | Dropbox, Inc. | Modifying Native Documents with Formulas in a Preview |
| CN107515945A (en) * | 2017-08-30 | 2017-12-26 | 四川长虹电器股份有限公司 | A kind of method of the preview document in webpage |
| CN108804503A (en) * | 2018-04-12 | 2018-11-13 | 北京明朝万达科技股份有限公司 | A kind of online method for previewing of document and system |
| CN110232161A (en) * | 2019-04-25 | 2019-09-13 | 天津市职业大学 | A kind of online method for previewing of document based on browser |
-
2021
- 2021-09-10 CN CN202111060311.3A patent/CN113778680A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160224517A1 (en) * | 2015-01-29 | 2016-08-04 | Dropbox, Inc. | Modifying Native Documents with Formulas in a Preview |
| CN107515945A (en) * | 2017-08-30 | 2017-12-26 | 四川长虹电器股份有限公司 | A kind of method of the preview document in webpage |
| CN108804503A (en) * | 2018-04-12 | 2018-11-13 | 北京明朝万达科技股份有限公司 | A kind of online method for previewing of document and system |
| CN110232161A (en) * | 2019-04-25 | 2019-09-13 | 天津市职业大学 | A kind of online method for previewing of document based on browser |
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