Relational-database-based online and controllable browsing method for PDF document

Abstract

The invention discloses a relational-database-based online and controllable browsing method for a PDF document, and relates to the technical field of networks. According to the method, the PDF document is converted into a binary system and encrypted by utilizing a server, the PDF document after being converted and encrypted is stored into a relational database, the information of the PDF document is displayed in a paged mode on line by reading the bookmark information of the PDF document itself, and the functions of controlling the display page number sequence, page scaling, page rotation, page skip and the like of a PDF converted image on line are achieved. In this way, a user can browse the PDF document on line without installing software of the Adobe Company, and the display effect of the PDF document can be controlled on line.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method for online controllable browsing of PDF documents. Background technique [0002] PDF documents are based on the PostScript language image model, which can guarantee accurate colors and accurate printing effects no matter what kind of printer is used, that is, PDF will faithfully reproduce every character, color and image of the original. In daily study and office work, users need to browse and view PDF documents: if the method of unified storage and online browsing is not adopted, the following problems will arise: [0003] 1. First of all, for users, if they want to view PDF documents, they generally use Adobe’s PDF viewing tool software, or third-party PDF viewing tools developed by other companies, so that PDFs can be saved by users through these tools, However, for PDF providers: some PDFs are not allowed to be downloaded, but can only be viewed online. [0004] 2...

AI Technical Summary

Problems solved by technology

[0003] 1. First of all, for users, if they want to view PDF documents, they generally use Adobe’s PDF viewing tool software, or third-party PDF viewing tools developed by other companies, so that PDFs can be saved by users through these tools, However, for PDF providers: some PDFs are not allowed to be downloaded and can only be viewed online

[0004] 2. If the user's network terminal device installs a PDF viewing tool, the same PDF document will be stored in each network terminal device, which will waste storage space and greatly increase the cost

When some network terminal equipment has a computer virus or failure, such as an important PDF document that cannot be recovered or exported, the consequences will be very serious

[0005] 3. Since there are many tools for generating PDF documents, and there are many tool software for viewing PDF documents, the existing technology cannot guarantee that these PDF viewing tools can be 100% compatible with PDF documents generated by different tools, and capacitive problems are prone to occur when viewing these documents. This causes users to be unable to view various PDF documents in time, affecting work efficiency

[0006] 4. In the prior art, if the encoding form of the PDF document is not changed but is directly converted into a picture format and stored in a document server or database, then these documents converted into pictures must have the possibility of leaking

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