CN105224510B - Method for converting file in document format - Google Patents
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- CN105224510B CN105224510B CN201510602834.4A CN201510602834A CN105224510B CN 105224510 B CN105224510 B CN 105224510B CN 201510602834 A CN201510602834 A CN 201510602834A CN 105224510 B CN105224510 B CN 105224510B
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Abstract
The invention provides a method for converting a document format file, which comprises the following steps: acquiring a file needing format conversion; judging whether the format of the file is a document format or not; initializing the document format file; sending the document format file to a document conversion node; and carrying out format conversion processing on the document format file. The method for converting the document format file can convert the document format file by utilizing the P2P node, effectively improve the speed of converting the document format and reduce the processing load of a server and a user terminal.
Description
Technical Field
The present invention relates to the field of computer file processing, and in particular, to a method for converting a document format file.
Background
With the development of the internet, live broadcast or on demand broadcast by using the network gradually becomes a trend, is slowly merged into the daily life of people, forms a hotspot in all aspects of work, study, entertainment and the like, and is more and more widely applied to video conferences, online education, network televisions and video websites. Especially, under the large background of popularization of computers, intelligent mobile terminals and WIFI, 3G and 4G wireless networks, users can watch online live broadcast or on-demand activities at any place with network connection through the computers or the intelligent mobile terminal devices, and the users can obtain related information more conveniently. Activities such as online education, video conferencing, etc. are better presented to the end user in the form of multimedia through live or on-demand services.
The existing applications of online education, video conferences and the like often use an interactive electronic blackboard as a demonstration platform, which plays an important role in improving the demonstration quality and efficiency, shared documents in the interactive electronic blackboard are used more and more frequently, a user can upload demonstration documents (such as office documents, PDF documents, multimedia files and the like) to the demonstration platform to be opened, and the operations of annotation, explanation and the like can be performed in the demonstration process. When uploading to the presentation platform, presentation documents in different formats are converted into interactive presentation file formats supported by the presentation platform, for example, swf format files.
The file format conversion process is usually finished on a user terminal or a server, when the file format conversion is carried out on the user terminal, as the basic principle of transcoding is to decode the file first and then encode the file in a coding mode of the format to be converted, a large amount of data processing work is required, so that long time is required, the load is heavier for a household computer or intelligent mobile terminal equipment with general CPU performance, the conversion efficiency is lower, the time for waiting for finishing the format conversion becomes intolerable when the format conversion is carried out on a relatively large file, and the user experience is poorer due to the overlong time for converting the file format. When the file format conversion is performed on the server, because there are many user terminals simultaneously served and there are many tasks for performing the file format conversion, a large burden is imposed on the server, thereby affecting the provision of other services.
Peer-to-peer networking is an emerging networking technology in recent years, and compared with the traditional C/S mode, the P2P mode has a very significant characteristic that nodes can communicate directly without relying on centralized server resources. P2P is an abbreviation for peer to peer mode. The P2P technology is a technology for directly exchanging data or services between different end users without passing through a relay device. The peer-to-peer network breaks through the traditional Client/Server mode, the positions of all nodes are the same in the peer-to-peer network, and the peer-to-peer network has the characteristics of a Client and a Server and can be used as a service user and a service provider at the same time. The core of P2P is to use user resources to perform file transfer in a peer-to-peer manner, which is completely different from the traditional client-server computing model. P2P enables fast file exchange independent of servers through "decentralized" design and multipoint delivery mechanisms.
How to reasonably utilize the idle resources of the user terminal equipment in the P2P network to convert the file format is the technical problem solved by the invention.
Disclosure of Invention
The invention provides a method for converting a document format file, which can convert the document format file by utilizing a P2P node, effectively improve the speed of converting the document format and reduce the processing load of a server and a user terminal.
In order to achieve the above object, the present invention provides a method for converting a document format file, comprising the following steps:
acquiring a file needing format conversion;
judging whether the format of the file is a document format or not;
initializing the document format file;
sending the document format file to a document conversion node;
and carrying out format conversion processing on the document format file.
Further, the document format judgment method is to judge according to the suffix name of the file.
Further, when the file is in a multimedia format, the file is sent to a multimedia conversion node for format conversion.
Further, the initialization processing of the document format file is to judge whether the file is an encrypted file or an illegal file, and calculate the number of pages of the document format file.
Further, when the page number of the document format file is 0, the file is marked as an empty file and the server is notified.
Further, the document conversion nodes include a first document conversion node without a PPT file conversion subtask and a second document conversion node with a PPT file conversion subtask.
Further, when the total number of pages of the document format file is less than the total number of the first document conversion nodes, each page of the document format file is sequentially distributed to each first document conversion node according to the node order.
Further, when the total number of pages of the document format file is greater than the total number of the first document conversion nodes and meets the condition of (L1 x 2+ L2) ≧ P, two pages of the document format file are sequentially distributed to each first document conversion node according to the node order, one page of the document format file is sequentially distributed to each second document conversion node according to the node order, and the conversion subtasks of each first document conversion node are preferentially distributed, wherein L1 represents the total number of the first document conversion nodes, L2 represents the total number of the second document conversion nodes, and P represents the total number of pages of the document format file.
Further, when the total number of pages of the document format file is greater than the total number of the first document conversion nodes and the number of the second document conversion nodes is 0, the total number of pages of the document format file is averagely allocated to the total number of each first document conversion node.
Further, when the total number of pages of the document format file is greater than the total number of the first document conversion nodes while satisfying a condition of (L1 × 2+ L2) < P and the number of second document conversion nodes is not 0, each node in the first document conversion nodes assigns a 2 n-page file, each node in the second document conversion nodes assigns n-page files, the remaining number of pages is sequentially assigned to the first document conversion nodes according to the order of the nodes, and if there are excess pages, the remaining number of pages is sequentially assigned to the second document conversion nodes according to the order of the nodes, wherein L1 represents the total number of first document conversion nodes, L2 represents the total number of second document conversion nodes, and P represents the total number of pages of the document format file.
Further, the format conversion processing of the document format file is to convert the document format file into an SWF format file or an html5 format file.
Further, the document conversion node is a node server in the P2P network.
Further, the document conversion node is a server or a virtual machine which is deployed in advance.
The invention provides a method for converting a document format file, which divides the document file needing format conversion into conversion subtasks of each single page, and reasonably distributes each page of conversion subtasks to P2P nodes for format conversion according to the number and the state of P2P nodes and the total page number of the document file. The file format file conversion method provided by the invention utilizes the P2P node to convert the format of each page of the document format file, effectively improves the efficiency of file format conversion through reasonable distribution of conversion subtasks, avoids the adoption of a server or a user terminal to convert the file format, and reduces the processing burden of the server or the user terminal.
Drawings
FIG. 1 is a flow chart of a method for converting a document format file according to a preferred embodiment of the present invention.
Detailed Description
The following description will be given with reference to the accompanying drawings, but the present invention is not limited to the following embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is noted that the drawings are in greatly simplified form and that non-precision ratios are used for convenience and clarity only to aid in the description of the embodiments of the invention.
Referring to FIG. 1, FIG. 1 is a flowchart illustrating a method for converting a document format file according to a preferred embodiment of the invention. The invention provides a method for converting a document format file, which comprises the following steps:
step S100: acquiring a file needing format conversion;
step S200: judging whether the format of the file is a document format or not;
step S300: initializing the document format file;
step S400: sending the document format file to a document conversion node;
step S500: and carrying out format conversion processing on the document format file.
According to the preferred embodiment of the present invention, the document format determination method is based on the suffix name of the file. The suffix name of the document format file comprises a ppt file, a word file, an excel file, a pdf file and a file suffix name corresponding to a document file supported by a system. When the suffix name of the file belongs to one of the document file suffix names supported above, it is judged as a document format file. For example, when the file suffix name is. doc or. docx, it is judged to be a word file.
Further, when the file is in a multimedia format, the file is sent to a multimedia conversion node for format conversion. According to the suffix name of the file, when the suffix name of the picture format or the audio/video format appears, the file is judged to belong to the multimedia format file, for example, when the suffix name of the file is JPG, GIF or BMP, the file is judged to be the picture format file, and when the suffix name of the file is MP3, MP4 or ASF, the file is judged to be the audio/video format file. Further, when the suffix name of the file does not belong to a document format or a multimedia format supported by the system, it is judged as an illegal file and notified to the server.
According to the preferred embodiment of the present invention, the initialization process of the document format file is to determine whether the file is an encrypted file or an illegal file, and to calculate the number of pages of the document format file. And when the page number of the document format file is 0, marking the file as an empty file and informing the server. And judging whether the file is an illegal file or not is to judge whether the file format is consistent with the file format corresponding to the suffix name of the file, and when the file format is inconsistent, judging that the file is the illegal file and informing the server. And when the file is judged to be the encrypted file, the server is also informed of the incapability of processing.
In accordance with a preferred embodiment of the present invention, the document conversion nodes include a first document conversion node without a PPT file conversion subtask and a second document conversion node with a PPT file conversion subtask. Because the PPT file format conversion task has a large processing load on the server and a low conversion speed, the P2P node server is divided into a first document conversion node and a second document conversion node according to whether the PPT file conversion subtask already exists in the server, so that the conversion subtask is preferentially allocated to the first document conversion node which is idle and has high residual processing capacity, and the second document conversion node which already has the PPT conversion subtask is not divided or is divided into a few new conversion subtasks as far as possible, so that the processing waiting time of the new conversion subtask is reduced, and the conversion efficiency is improved.
The document file format conversion subtask is distributed according to the total number of pages of the file and the quantity relationship between the first document conversion node and the second document conversion node and according to the following principle:
and when the total page number of the document format file is less than the total number of the first document conversion nodes, sequentially distributing each page of the document format file to each first document conversion node according to the node sequence. In this case, because there are many first document conversion nodes, the conversion subtask may not be allocated to the second document conversion node, and the conversion subtask may not be allocated to the first document conversion node that is ranked later, and the document format conversion subtask of each page is processed by the first document conversion node that is idle and has a high residual processing capability, so that the conversion efficiency can be improved, the conversion speed can be increased, the user waiting time can be reduced, and the user experience can be improved.
When the total page number of the document format files is larger than the total number of the first document conversion nodes and meets the condition that (L1 x 2+ L2) is larger than or equal to P, two pages of document format files are sequentially distributed to each first document conversion node according to the node sequence, one page of document format file is sequentially distributed to each second document conversion node according to the node sequence, and conversion subtasks of each first document conversion node are preferentially distributed, wherein L1 represents the total number of the first document conversion nodes, L2 represents the total number of the second document conversion nodes, and P represents the total page number of the document format files. In this case, two-page file conversion subtasks are preferentially assigned to each first document conversion node, the remaining number of pages is assigned to the second document conversion node, and only one page conversion subtask is assigned to each second document conversion node. The task allocation is performed according to the order of the nodes, so that the second document conversion node after the ranking may not allocate the conversion subtasks, and when the number of the first document conversion nodes is large, the second conversion node may not allocate the conversion subtasks, and even the first document conversion node after the ranking may not allocate the conversion subtasks, when the total number of pages is an odd number of pages, the following first document conversion node only allocates one conversion subtask, for example, when the total number of pages of the file to be subjected to document format conversion is 49 pages, the number of the first document conversion nodes is 30, the number of data of the second document conversion node is 10, and the conversion subtasks are allocated according to the following principle: the first document conversion nodes ranked as the first 24 are sequentially distributed with 2-page conversion subtasks according to the node sequence, the 25 th first document conversion node is distributed with 1-page conversion subtasks, and the rest first document conversion nodes and the rest second document conversion nodes are not distributed with conversion subtasks.
And when the total number of pages of the document format file is greater than the total number of the first document conversion nodes and the number of the second document conversion nodes is 0, averagely distributing the total number of pages of the document format file to the total number of each first document conversion node. In this case, all the nodes are the first document conversion nodes, the total number of pages of the document format file is divided by the total number of nodes, and if the document format file cannot be divided completely, the document format file is processed in a manner of discarding after a decimal point, for example, when the total number of pages of the document file is 100 pages, the total number of the first document conversion nodes is 30, the number of the second document conversion nodes is 0, 100/30 is calculated to be 3.33, and 3.33 is automatically calculated to be 3, that is, each node is first allocated with 3 conversion subtasks, so each first document conversion node is first allocated with 3 conversion subtasks, and the remaining 10 conversion subtasks are sequentially allocated to the first 10 first document conversion nodes according to the node order.
When the total number of pages of the document format file is greater than the total number of the first document conversion nodes, and simultaneously satisfies the condition of (L1 x 2+ L2) < P, and the number of second document conversion nodes is not 0, each node in the first document conversion nodes allocates 2n pages of files, each node in the second document conversion nodes allocates n pages of files, the remaining pages are sequentially allocated to the first document conversion nodes according to the order of the nodes, and if the number of redundant pages is more, the remaining pages are sequentially allocated to the second document conversion nodes according to the order of the nodes, wherein L1 represents the total number of the first document conversion nodes, L2 represents the total number of the second document conversion nodes, and P represents the total number of pages of the document format file. In this case, the total number of pages of the document file to be subjected to format conversion is divided by (L1 × 2+ L2), and the calculation result is distributed after discarding the decimal point, for example, when the total number of pages of the document to be subjected to format conversion is 110 pages, the number of the first document conversion nodes is 20, the number of the second document conversion nodes is 10, the calculation is 110/50 is 2.2, and n is 2, that is, each first document conversion node is firstly distributed with 4 conversion subtasks, each second document conversion node is firstly distributed with 2 conversion subtasks, and the remaining 10 conversion subtasks are sequentially distributed to the first ten first document conversion nodes according to the node order.
When the document conversion node distributed with the conversion subtasks leaves, all the distributed conversion subtasks are taken out, then all the document conversion nodes are traversed, each conversion subtask is sequentially distributed to the node server which does not have the conversion subtasks at present to be processed, if all the document conversion nodes at present have the conversion subtasks in the process, the first conversion subtask is distributed to the document conversion node which is arranged at the top of the sequence, then all the document conversion nodes are traversed again, and the second conversion subtask is continuously distributed according to the rule until all the taken conversion subtasks are completely distributed.
The document conversion node is a node server in the P2P network. Meanwhile, the document conversion node server can also adopt a plurality of servers or virtual machines deployed by the document conversion node server, the servers or virtual machines form a server cluster to distribute and process the file format conversion subtasks, and a service provider adopts the servers or virtual machines deployed by the service provider to enhance the stability of the conversion service.
According to the preferred embodiment of the present invention, the format conversion processing of the document format file is to convert the document format file into an SWF format file or an html5 format file.
The SWF is a Flash animation file based on vectors, is generally created by using FLASH software and generates an SWF file format, and can also convert files of types such as doc, ppt, PDF and the like into the SWF format through corresponding software. SWF format files are widely used to create attractive applications that contain rich video, sound, graphics, and animation. Raw content can be created in Flash or imported from other Adobe applications (such as Photoshop or Illustrator), simple animations can be quickly designed, and advanced interactive projects can be developed using Adobe AcitonScript 3.0. Which designers and developers can use to create presentations, applications, and other content that allows user interaction. Flash may contain simple animations, video content, complex presentations and applications and anything in between. By designing the SWF file format, the addition of user interactive contents can be realized by applications such as online education, video conferences and the like, so that the effects of more intuition, vividness and image are achieved. In the preferred embodiment of the invention, the document file format conversion is carried out by using iSpring software, which is an interactive courseware making tool, so that a presentation document can be easily added into sound, video, test questions, interaction and the like, and simultaneously, the Flash film in the SWF file format is converted by one key, and the original visualization and animation effects can be kept while the conversion is carried out.
HTML5, which is a version of the HTML standard that replaces the HTML 4.01 and XHTML 1.0 standards made in 1999, is still in the development stage, but most browsers already support some HTML5 technology. HTML5 has two major features: first, the performance of the Web page is enhanced. Next, a function of a Web application such as a local database is added. When referring to HTML5 in a broad sense, it actually refers to a set of combinations of technologies including HTML, CSS and java script. It is desirable to reduce the browser's need for rich web Application Services (RIAs) that require plug-ins, such as Adobe Flash, Microsoft Silverlight, and Oracle JavaFX, and to provide a more standard set that effectively enhances web applications. Especially, the webpage multimedia characteristic of HTML supports multimedia functions of Audio, Video and the like at a webpage end, brings out the best in each other with APPS, a camera and a Video and Audio function carried by a website, and simultaneously has the advantages of supporting multiple devices, spanning platforms and self-adaption. In the preferred embodiment of the present invention, the document file format conversion can also be performed by using the isring software, and the document format file is converted into the HTML5 format for presentation.
And after all the document conversion nodes finish the format conversion subtask processing, the server collects all conversion results and combines the conversion results into a presentation document according to the original page sequence, and the server stores the presentation document for subsequent presentation so as to finish the format conversion process of the whole document file.
In summary, the document format file conversion method provided by the present invention splits the document file to be format-converted into conversion subtasks for each single page, and reasonably allocates each conversion subtask to the P2P node for format conversion according to the number and state of the P2P nodes and the total number of pages of the document file. The file format file conversion method provided by the invention utilizes the P2P node to convert the format of each page of the document format file, effectively improves the efficiency of file format conversion through reasonable distribution of conversion subtasks, avoids the adoption of a server or a user terminal to convert the file format, and reduces the processing burden of the server or the user terminal.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A method for converting a document format file, comprising the steps of:
acquiring a file needing format conversion;
judging whether the format of the file is a document format or not;
initializing the document format file;
sending the document format file to a document conversion node;
carrying out format conversion processing on the document format file;
the document conversion nodes comprise a first document conversion node without a PPT file conversion subtask and a second document conversion node with the PPT file conversion subtask;
when the total number of pages of the document format file is larger than the total number of the first document conversion nodes and simultaneously meets the condition that (L1 x 2+ L2) is larger than or equal to P, two pages of document format files are sequentially distributed to each first document conversion node according to the node order, one page of document format file is sequentially distributed to each second document conversion node according to the node order, and the conversion subtasks of each first document conversion node are preferentially distributed, wherein L1 represents the total number of the first document conversion nodes, L2 represents the total number of the second document conversion nodes, and P represents the total number of pages of the document format file;
when the total number of pages of the document format file is larger than the total number of the first document conversion nodes, and simultaneously the condition that (L1 x 2+ L2) < P is met, and the number of the second document conversion nodes is not 0, 2n pages of files are distributed to each node in the first document conversion nodes, n pages of files are distributed to each node in the second document conversion nodes, the rest pages are sequentially distributed to the first document conversion nodes according to the order of the nodes, and if the rest pages are left, the rest pages are sequentially distributed to the second document conversion nodes according to the order of the nodes, wherein n represents an integer obtained by discarding decimal points from the calculation result of dividing the total number of pages of the document files needing format conversion by (L1 x 2+ L2).
2. The method of converting a document format file according to claim 1, wherein the document format judgment method is a judgment based on a file suffix name.
3. The method of claim 1, wherein when the file is in a multimedia format, the file is transmitted to a multimedia conversion node for format conversion.
4. The method of converting a document format file according to claim 1, wherein the initialization process of the document format file is to judge whether the file is an encrypted file or an illegal file and to calculate the number of pages of the document format file.
5. The method of converting a document format file according to claim 4, wherein when the number of pages of the document format file is 0, it is marked as an empty file and notified to a server.
6. The method of converting a document format file according to claim 1, wherein when the total number of pages of the document format file is smaller than the total number of the first document conversion nodes, each page of the document format file is sequentially assigned to each of the first document conversion nodes in the order of nodes.
7. The method of converting a document format file according to claim 1, wherein when the total number of pages of the document format file is larger than the total number of the first document conversion nodes while the number of the second document conversion nodes is 0, the total number of pages of the document format file is averagely assigned to each of the total number of the first document conversion nodes.
8. The method for converting a document format file according to claim 1, wherein the format conversion processing of the document format file is converting the document format file into an SWF format file or an html5 format file.
9. The method of converting a document format file according to claim 1, wherein the document conversion node is a node server in a P2P network.
10. The method of converting a document format file according to claim 1, wherein the document conversion node is a pre-deployed server or a virtual machine.
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| CN111475477A (en) * | 2019-01-23 | 2020-07-31 | 北京二六三企业通信有限公司 | File format conversion method, client and format conversion server |
| CN110175149A (en) * | 2019-05-30 | 2019-08-27 | 京东方科技集团股份有限公司 | Conversion method, device and equipment based on DICOM file |
| CN110532524A (en) * | 2019-07-02 | 2019-12-03 | 杭州博世数据网络有限公司 | A kind of system and method for PPT document automatic conversion html5 document |
| CN110460864A (en) * | 2019-07-16 | 2019-11-15 | 仲恺农业工程学院 | A method of it improves and image quality of giving lessons is broadcast live online |
| CN113704214A (en) * | 2021-08-27 | 2021-11-26 | 北京市律典通科技有限公司 | Electronic file type conversion method and device and computer equipment |
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