CN106777179B - Document online preview method and system - Google Patents
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- CN106777179B CN106777179B CN201611199646.2A CN201611199646A CN106777179B CN 106777179 B CN106777179 B CN 106777179B CN 201611199646 A CN201611199646 A CN 201611199646A CN 106777179 B CN106777179 B CN 106777179B
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- G06F16/10—File systems; File servers
- G06F16/11—File system administration, e.g. details of archiving or snapshots
- G06F16/116—Details of conversion of file system types or formats
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Abstract
The application discloses a document online preview method, which comprises the following steps: acquiring an original file; respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set; when a page preview request initiated by the user terminal for a target page in an original file is acquired, pictures corresponding to the target page are screened from the picture set, and the pictures are sent to the user terminal. Therefore, the file is converted into the small picture format occupying space, the corresponding picture of the page needing to be previewed by the user is sent to the user, flow consumption is reduced when the user previews the picture, the user can appoint to preview the picture of the page needing to be previewed without downloading and previewing the whole file, a specific program is not needed to be installed, the picture can be directly read, and user experience is improved. In addition, the application also correspondingly discloses a document online preview system.
Description
Technical Field
The invention relates to the field of computers, in particular to a document online previewing method and a document online previewing system.
Background
With the development and popularization of smart phones and mobile internet, mobile office becomes a trend. People need to quickly master information consultation, wherein the preview of an office document is an important operation, the current implementation scheme mainly converts the office document into a pdf file, and the pdf file is a file format designed for viewing conveniently and can protect the document from being tampered.
However, converting the office document into the pdf file also faces some problems, and first, the pdf file must be completely downloaded to a terminal such as a personal computer or a mobile phone for viewing, which consumes valuable network traffic, and the pdf file must be viewed only by installing a corresponding application program, so that the document cannot be integrated into other application programs.
Therefore, how to provide a method capable of quickly previewing and reducing the traffic consumption becomes a technical problem.
Disclosure of Invention
In view of this, the present invention provides a method and a system for online previewing a document, which can quickly preview a document, reduce traffic consumption, and improve user experience. The specific scheme is as follows:
a document online preview method comprises the following steps:
acquiring an original file;
respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set;
and when a page preview request initiated by the user terminal for a target page in the original file is acquired, screening out pictures corresponding to the target page from the picture set, and sending the pictures to the user terminal.
Preferably, the process of respectively converting each page of the original document into a corresponding picture includes:
acquiring file metadata corresponding to the original file to obtain target metadata; wherein the target metadata comprises file category information of the original file;
determining a file conversion queue corresponding to the file category information in the target metadata to obtain a target conversion queue;
saving the target metadata to the target conversion queue;
and correspondingly starting a picture conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue so as to convert each page of the original file into a corresponding picture and obtain the picture set.
Preferably, the process of saving the target metadata to the target conversion queue includes:
and storing the target metadata to the target conversion queue, allocating corresponding queue priority to the target metadata, and creating a global lock corresponding to the target metadata in the target conversion queue to obtain a target global lock.
Preferably, the process of saving the target metadata to the target conversion queue includes:
and storing the target metadata to the target conversion queue, allocating corresponding queue priority to the target metadata, and creating a global lock corresponding to the target metadata in the target conversion queue to obtain a target global lock.
Preferably, before the process of creating a global lock corresponding to the target metadata in the target translation queue, the method further includes:
and if a page preview request initiated by the user terminal for any page in the original file is acquired, the queue priority of the target metadata in the target conversion queue is promoted.
Preferably, the method further comprises the following steps: after the picture set is obtained, regularly checking whether useless pictures exist in the picture set;
when the useless pictures are detected, deleting the useless pictures; the useless pictures are pictures which are concentrated in a preset time and do not receive page preview requests.
The invention also discloses a document online preview system, which comprises:
the file acquisition module is used for acquiring an original file;
the file conversion module is used for respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set;
the preview request acquisition module is used for acquiring a page preview request initiated by the user terminal aiming at a target page in the original file;
the picture screening module is used for screening out pictures corresponding to the target page from the picture set;
and the picture sending module is used for sending the picture screened by the picture screening module to the user terminal.
Preferably, the file conversion module includes:
the metadata acquisition sub-module is used for acquiring file metadata corresponding to the original file to obtain target metadata; wherein the target metadata comprises file category information of the original file;
a conversion queue determining submodule, configured to determine a file conversion queue corresponding to the file category information in the target metadata, to obtain a target conversion queue;
the metadata storage sub-module is used for storing the target metadata to the target conversion queue;
and the file conversion sub-module is used for correspondingly starting an image conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue so as to convert each page of the original file into a corresponding image and obtain the image set.
Preferably, the metadata saving sub-module includes:
a priority allocation unit, configured to store the target metadata to the target conversion queue, and allocate a corresponding queue priority to the target metadata;
and the global lock creating unit is used for creating a global lock corresponding to the target metadata in the target conversion queue to obtain a target global lock.
Preferably, the method further comprises the following steps:
the regular checking module is used for regularly checking whether useless pictures exist in the picture set after the picture set is obtained;
the picture deleting module is used for deleting the useless pictures when the useless pictures are detected; the useless pictures are pictures which are concentrated in a preset time and do not receive page preview requests.
In the invention, the document online preview method comprises the following steps: acquiring an original file; respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set; when a page preview request initiated by the user terminal for a target page in an original file is acquired, pictures corresponding to the target page are screened from the picture set, and the pictures are sent to the user terminal. Therefore, the file is converted into the small picture format occupying space, and the corresponding picture of the page needing to be previewed by the user is sent to the user, so that the flow consumption is reduced when the user previews the page, the user can specify the picture of the page needing to be previewed, the whole file is not required to be completely downloaded and previewed, a specific program is not required to be installed, the picture can be directly read, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart of a document online preview method according to an embodiment of the present invention;
FIG. 2 is a flowchart of another online document previewing method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a document online preview system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a document online previewing method, which is shown in a figure 1 and comprises the following steps:
step S11: and acquiring an original file.
Specifically, the server receives an original file uploaded by a user, allocates a storage location for the original file, stores the original file in the server, and provides materials for subsequent file conversion.
The type of the original file uploaded by the user may include file types such as a word document, an excel table, a txt text, or a pdf.
Of course, the server may receive multiple files simultaneously, and the user may upload the files in the form of an original file set, where the original file set includes multiple original files.
Step S12: and respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set.
Specifically, the server analyzes the type of the original file, divides each page in the file by using the type of the file, converts the original file after calculating the content and the quantity of the pictures corresponding to the pages of the original file, converts each page contained in the original file into the corresponding picture to obtain a picture set, wherein the original file corresponds to the picture set, and the picture set contains the picture corresponding to each page of the original file.
For example, a document is stored in the server, the server analyzes the document type, the analysis result is a word document, the content arrangement mode of the word document is utilized, the self-contained page format of the word document is taken as a standard, the number of pages of the document is calculated to be 50, the number of corresponding pictures needing to be converted is 50, after the analysis result is obtained, the word document is started to be converted, 50 pages are converted into corresponding 50 pictures respectively, and the 50 pictures are stored in the form of a picture set, wherein the picture set corresponds to the original file.
It can be understood that there may be a plurality of original files, and therefore, in order to increase the conversion speed, in the conversion process, the server may simultaneously convert a plurality of different original files, for example, there are 10 different original files, and the server simultaneously starts 10 processes to respectively convert the 10 different original files, so as to implement parallel conversion, thereby improving the conversion efficiency.
Step S13: when a page preview request initiated by the user terminal for a target page in an original file is acquired, pictures corresponding to the target page are screened from the picture set, and the pictures are sent to the user terminal.
Specifically, a user requesting for previewing sends a preview request according to a previewable file displayed by a server, when the server acquires the preview request sent by the user and analyzes a target page in an original file which the user needs to preview by using the preview request, a corresponding picture set is found by using the corresponding relation between the original file and the picture set, then a picture corresponding to the target page is screened out from the picture set according to the corresponding relation between the page and the picture, and the picture is sent to a user terminal.
It can be understood that the preview request of the user may include a preview request for multiple pages in the same original document, so that the pictures corresponding to multiple target pages are collectively screened out, and the pictures corresponding to the multiple target pages are sent to the user terminal; or receiving a page preview request initiated by a user for a target page in a plurality of original files, respectively searching the pictures corresponding to the target page in the corresponding picture sets of the original files, and then sending the searched pictures to the user terminal.
Therefore, the file is converted into the small picture format occupying space, and the corresponding picture of the page needing to be previewed by the user is sent to the user, so that the flow consumption is reduced when the user previews the file, the user can specify the picture of the page needing to be previewed, the whole file is not required to be completely downloaded and previewed, a specific program is not required to be installed, the picture can be directly read, and the user experience is improved.
The embodiment of the invention discloses a specific document online previewing method, and compared with the previous embodiment, the technical scheme is further explained and optimized in the embodiment. Referring to fig. 2, specifically:
step S21: and acquiring an original file.
Step S22: acquiring file metadata corresponding to an original file to obtain target metadata; the target metadata comprises file category information of the original file.
Specifically, the server analyzes various attribute information of the original file, and obtains file metadata corresponding to the original file to obtain target metadata; the target metadata comprises file category information of the original file.
It can be understood that the file category information includes information such as a file size, a file type, and a storage location of the original file in the server, which are analyzed by the server using the original file, and the server uses the file metadata to record a correspondence between the original file and the picture set and between the page and the picture, so that the corresponding file, page, or picture can be found through the file metadata.
Step S23: determining a file conversion queue corresponding to the file category information in the target metadata to obtain a target conversion queue; and saving the target metadata to a target conversion queue.
In practical application, if the file conversion process is only serial processing and has no corresponding file processing sequence, which may or may result in a situation of low file conversion efficiency, the file metadata is put into the corresponding file conversion queue to obtain a target conversion queue by using the file type information recorded in the file metadata, such as the file size and the file type of the original file, and in the same file conversion queue, the file metadata are arranged according to a preset priority, that is, the original file conversion sequence is ordered according to a preset priority.
The setting standard of the priority of the file conversion queue may use time required for converting a file into a picture as a determination standard, for example, a conversion time threshold is preset, the priority of a file whose conversion time is greater than or equal to the threshold is set as a low priority, and the priority of a file whose conversion time is less than the threshold is set as a medium priority, so as to prevent a file from occupying a file conversion process for a long time and causing a subsequent file conversion process to be blocked, and of course, a long-time file conversion process may be used separately for a file whose conversion time is longer than the threshold, and an original file whose conversion time exceeds the threshold is classified into a long-time file conversion process, so as to accelerate the file conversion speed.
It should be noted that, in order to prevent the file conversion queue from being called by multiple file conversion processes and generating a situation of repeatedly converting the same original file, after the target metadata is saved in the target conversion queue, a global lock corresponding to the target metadata in the target conversion queue is generated, and a target global lock is obtained.
And step S24, correspondingly starting a picture conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue, so as to convert each page of the original file into a corresponding picture, thereby obtaining a picture set.
Specifically, according to the priority sequence of the target metadata in the target conversion queue, correspondingly starting a picture conversion process of the original file, and locking the process by using a target global lock, so that the original file corresponding to the target metadata is not converted any more after other conversion processes detect the target global lock, and only one file conversion process is ensured to convert the original file; and when the picture conversion process aiming at the original file is finished, deleting the target global lock.
Step S25: when a page preview request initiated by the user terminal for a target page in an original file is acquired, pictures corresponding to the target page are screened from the picture set, and the pictures are sent to the user terminal.
It can be understood that, when the server receives a page preview request initiated by the user terminal for a target page in the original file, and the server does not find a picture corresponding to the target page in the stored picture set, the server searches for a corresponding target global lock;
if the corresponding target global lock is found, the picture corresponding to the target page is still in conversion, and after the target global lock is deleted, the picture corresponding to the target page is screened out in the picture set and sent to the user terminal.
If the target global lock is not found, the queue priority of the target metadata in the target conversion queue is improved, so that the original file corresponding to the target metadata starts to be converted or the conversion is started immediately after the previous original file finishes the conversion.
In practical application, the storage capacity of the server is limited, so that after a picture set is obtained, whether useless pictures exist in the picture set is periodically checked; when the useless pictures are detected, deleting the useless pictures; the useless pictures are pictures which are concentrated in the preset time and do not receive the page preview request, so that the storage space is saved, and manual processing is not needed. For example, after the picture set is obtained, the picture set is stored in a hard disk of the server, whether pictures in the picture set have pictures which do not receive the page preview request within 3 months is checked every 24 hours, and the pictures which do not receive the page preview request within 3 months are deleted. Of course, the preset time and the check period may be set by the administrator according to actual experience, and are not limited to the preset time being 3 months and the check period being 24 hours, and are not limited herein.
In addition, an embodiment of the present invention further provides a document online preview system, as shown in fig. 3, the system includes:
a file obtaining module 11, configured to obtain an original file;
the file conversion module 12 is configured to convert each page of the original file into a corresponding picture, so as to obtain a corresponding picture set;
a preview request obtaining module 13, configured to obtain a page preview request initiated by a user terminal for a target page in an original file;
the picture screening module 14 is used for screening out pictures corresponding to the target page from the picture set;
and the picture sending module 15 is used for sending the pictures screened by the picture screening module to the user terminal.
Specifically, the file conversion module 12 specifically includes a metadata acquisition sub-module, a conversion queue determination sub-module, a metadata storage sub-module, and a file conversion sub-module; wherein the content of the first and second substances,
the metadata acquisition sub-module is used for acquiring file metadata corresponding to the original file to obtain target metadata; the target metadata comprises file category information of the original file;
the conversion queue determining submodule is used for determining a file conversion queue corresponding to the file category information in the target metadata to obtain a target conversion queue;
the metadata storage submodule is used for storing the target metadata to a target conversion queue;
and the file conversion sub-module is used for correspondingly starting a picture conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue so as to convert each page of the original file into a corresponding picture and obtain a picture set.
The metadata storage submodule specifically comprises a priority allocation unit and a global lock creation unit; wherein the content of the first and second substances,
the priority distribution unit is used for storing the target metadata to a target conversion queue and distributing corresponding queue priority to the target metadata;
and the global lock creating unit is used for creating a global lock corresponding to the target metadata in the target conversion queue to obtain the target global lock.
The file conversion submodule specifically comprises a file conversion starting unit, a process locking unit and a global lock deleting unit; wherein the content of the first and second substances,
the file conversion starting unit is used for starting a picture conversion process of the original file;
the process locking unit is used for locking the process by using the target global lock when the file conversion starting unit starts the picture conversion process of the original file;
and the global lock deleting unit is used for deleting the target global lock after the picture conversion process aiming at the original file is finished.
The document online preview system in the embodiment of the invention further comprises:
and a priority changing module, configured to, before a process of creating a global lock corresponding to target metadata in a target conversion queue, if the preview request obtaining module 13 obtains a page preview request initiated by the user terminal for any page in the original file, raise a queue priority of the target metadata in the target conversion queue.
The regular checking module is used for regularly checking whether useless pictures exist in the picture set after the picture set is obtained by the file conversion module 12;
the picture deleting module is used for deleting the useless pictures when the useless pictures are detected; the useless pictures are pictures which are concentrated in a preset time and do not receive page preview requests.
Therefore, the file is converted into the small picture format occupying space, and the corresponding picture of the page needing to be previewed by the user is sent to the user, so that the flow consumption is reduced when the user previews the file, the user can specify the picture of the page needing to be previewed, the whole file is not required to be completely downloaded and previewed, a specific program is not required to be installed, the picture can be directly read, and the user experience is improved.
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 apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The document online preview method and system provided by the invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used to help understanding 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 (4)
1. A document online preview method is characterized by comprising the following steps:
acquiring an original file;
respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set;
when a page preview request initiated by a user terminal for a target page in the original file is acquired, pictures corresponding to the target page are screened out from the picture set, and the pictures are sent to the user terminal;
wherein the converting each page of the original document into a corresponding picture comprises:
acquiring file metadata corresponding to the original file to obtain target metadata; wherein the target metadata comprises file category information of the original file;
determining a file conversion queue corresponding to the file category information in the target metadata to obtain a target conversion queue;
saving the target metadata to the target conversion queue;
correspondingly starting a picture conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue so as to convert each page of the original file into a corresponding picture and obtain the picture set;
wherein, a plurality of different original files are converted to realize parallel conversion;
wherein the saving the target metadata to the target conversion queue comprises:
storing the target metadata to the target conversion queue, allocating corresponding queue priority to the target metadata, and creating a global lock corresponding to the target metadata in the target conversion queue to obtain a target global lock;
wherein the starting of the picture conversion process for the original file includes:
starting a picture conversion process of the original file, and locking the process by using the target global lock;
when the picture conversion process aiming at the original file is finished, deleting the target global lock;
wherein prior to the creating a global lock corresponding to the target metadata in the target translation queue, further comprising:
if a page preview request initiated by the user terminal for any page in the original file is acquired, the queue priority of the target metadata in the target conversion queue is promoted;
when a page preview request initiated by a user terminal for a target page in an original file is received and a picture corresponding to the target page is not found in a stored picture set, searching for a corresponding target global lock;
if the corresponding target global lock is found, screening out the picture corresponding to the target page from the picture set, and sending the picture to the user terminal;
if the target global lock is not found, the queue priority of the target metadata in the target conversion queue is improved, so that the original file corresponding to the target metadata starts to be converted or the conversion is started immediately after the previous original file finishes the conversion.
2. The method for previewing a document on-line according to claim 1, further comprising:
after the picture set is obtained, regularly checking whether useless pictures exist in the picture set;
when the useless pictures are detected, deleting the useless pictures; the useless pictures are pictures which are concentrated in a preset time and do not receive page preview requests.
3. A document online preview system, comprising:
the file acquisition module is used for acquiring an original file;
the file conversion module is used for respectively converting each page of the original file into a corresponding picture to obtain a corresponding picture set;
the preview request acquisition module is used for acquiring a page preview request initiated by the user terminal aiming at a target page in the original file;
the picture screening module is used for screening out pictures corresponding to the target page from the picture set;
the picture sending module is used for sending the pictures screened by the picture screening module to the user terminal;
wherein the file conversion module comprises:
the metadata acquisition sub-module is used for acquiring file metadata corresponding to the original file to obtain target metadata; wherein the target metadata comprises file category information of the original file;
a conversion queue determining submodule, configured to determine a file conversion queue corresponding to the file category information in the target metadata, to obtain a target conversion queue;
the metadata storage sub-module is used for storing the target metadata to the target conversion queue;
the file conversion sub-module is used for correspondingly starting an image conversion process of the original file according to the priority sequence of the target metadata in the target conversion queue so as to convert each page of the original file into a corresponding image and obtain the image set;
wherein, a plurality of different original files are converted to realize parallel conversion;
wherein the metadata saving sub-module includes:
a priority allocation unit, configured to store the target metadata to the target conversion queue, and allocate a corresponding queue priority to the target metadata;
a global lock creating unit, configured to create a global lock corresponding to the target metadata in the target conversion queue, so as to obtain a target global lock;
the file conversion submodule specifically comprises a file conversion starting unit, a process locking unit and a global lock deleting unit; wherein the content of the first and second substances,
the file conversion starting unit is used for starting a picture conversion process of the original file;
the process locking unit is used for locking the process by using the target global lock when the file conversion starting unit starts the picture conversion process of the original file;
the global lock deleting unit is used for deleting the target global lock after the picture conversion process aiming at the original file is finished;
the priority changing module is used for promoting the queue priority of the target metadata in the target conversion queue if the preview request acquiring module acquires a page preview request initiated by the user terminal aiming at any page in the original file before the global lock corresponding to the target metadata in the target conversion queue is created;
when a page preview request initiated by a user terminal for a target page in an original file is received and a picture corresponding to the target page is not found in a stored picture set, searching for a corresponding target global lock;
if the corresponding target global lock is found, screening out the picture corresponding to the target page from the picture set, and sending the picture to the user terminal;
if the target global lock is not found, the queue priority of the target metadata in the target conversion queue is improved, so that the original file corresponding to the target metadata starts to be converted or the conversion is started immediately after the previous original file finishes the conversion.
4. The document online preview system of claim 3, further comprising:
the regular checking module is used for regularly checking whether useless pictures exist in the picture set after the picture set is obtained;
the picture deleting module is used for deleting the useless pictures when the useless pictures are detected; the useless pictures are pictures which are concentrated in a preset time and do not receive page preview requests.
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| CN103389969B (en) * | 2012-05-07 | 2016-02-24 | 腾讯科技（深圳）有限公司 | A kind of methods, devices and systems for mobile terminal preview pdf document |
| CN104767777A (en) * | 2014-01-07 | 2015-07-08 | 中国移动通信集团贵州有限公司 | System and method of opening remote file |
| CN104615391A (en) * | 2015-02-03 | 2015-05-13 | 九玉（北京）科技有限公司 | File previewing method, device and system |
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