CN107885848A - Web page screen-cutting method based on web technology - Google Patents
Web page screen-cutting method based on web technology Download PDFInfo
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- CN107885848A CN107885848A CN201711111579.9A CN201711111579A CN107885848A CN 107885848 A CN107885848 A CN 107885848A CN 201711111579 A CN201711111579 A CN 201711111579A CN 107885848 A CN107885848 A CN 107885848A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/958—Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking
- G06F16/986—Document structures and storage, e.g. HTML extensions
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Abstract
The invention discloses a kind of Web page screen-cutting method based on web technology, comprise the following steps：The routine interface of web page browser is called to obtain each HTML element for the webpage to be intercepted；Call browser program interface to parse the attribute of each HTML element, the attribute being parsed is saved as to orderly HTML element attribute list；Browser program interface is called to create HTML canvas painting canvas；Browser program interface scan round HTML element attribute list is called, the html attribute content in HTML element attribute list is plotted on canvas painting canvas；The canvas painting canvas transform coding completed is base64 character strings and preserved by the routine interface for calling canvas painting canvas；User is guided to download canvas painting canvas by way of adding button on the page.The present invention, which has, needs not rely on other instruments, solves the characteristics of technical problem that Web page screen-cutting is relied on third party's instrument.
Description
Technical field
The present invention relates to web design fields, more particularly, to a kind of screenshotss method based on web page.
Background technology
In general Web page screen-cutting technology by the way that viewable pictures are preserved and allow user to be sheared according to demand, now we
Extra instrument is needed to go to complete this task.If the screenshotss instrument that user is not adapted to, the purpose of user is not just reached.
Common web page all goes rolling to show content with scroll bar, and now current visual screen can not just show
Whole contents, user can not disposably make the screen for including whole page content, and the picture intercepted is not easy to keep original painting
Definition, have a certain degree of distortion.
In view of the above-mentioned problems, current way renders generally by server end, but this has undoubtedly aggravated server
Burden, and third party's plug-in unit that full frame intercepting page is also partial view device is realized, the cost used is higher, integrates relatively more tired
It is difficult.There is presently no a set of effective solution.
The content of the invention
The goal of the invention of the present invention is to overcome Web page screen-cutting at present of the prior art to rely on third party's screenshotss instrument
Deficiency, there is provided a kind of Web page screen-cutting method based on web technology.
To achieve these goals, the present invention uses following technical scheme：
A kind of Web page screen-cutting method based on web technology, comprises the following steps：
(1-1) calls the routine interface of web page browser to obtain each HTML element for the webpage to be intercepted；
(1-2) calls the attribute of each HTML element of browser program interface parsing, if detecting current html element
Element includes sub- HTML element, treats that current HTML element continues to parse sub- HTML element after being parsed, and constantly repeat to work as
Preceding resolving, untill all HTML elements and sub- HTML element are all parsed, the attribute being parsed is preserved
For orderly HTML element attribute list；
(1-3) calls one HTML of browser program interface establishment canvas painting canvas；
(1-4) calls browser program interface scan round HTML element attribute list, has in HTML element attribute list
Picture resource links url, and picture resource link url calls browser program interface to send network request and Loaded Image x.jpg, treats
After the completion of resource loading, using canvas painting canvas drawing rules, the html attribute content in HTML element attribute list is drawn
Onto canvas painting canvas；
The canvas painting canvas transform coding completed is base64 words by the routine interface of (1-5) calling canvas painting canvas
Symbol is gone here and there and preserved, and obtains the canvas painting canvas of character string forms；
(1-6) guides user to download canvas painting canvas by way of adding button on the page, when user clicks on button
When, canvas painting canvas is saved on local memory device in the form of picture using browser.
Content used in the present invention all is from the element of the current web page page, it is not necessary to relies on other instruments, solves
The technical problem that Web page screen-cutting relies on third party's instrument.Further, the picture intercepted according to present example can be with
Whole comprising the webpage to be intercepted needs content, solves dependence of the current screenshotss instrument to screen viewing area.Enter one
Step, the picture that present example is intercepted can highly reduce image quality.Further, the picture that the present invention intercepts can be only with text
This preservation, the shelf space of storage device is saved, be also beneficial to propagate.
Preferably, HTML element is 4, respectively div elements, canvas elements, image elements and ul elements.
Preferably, the attribute of HTML element includes background color, background picture, position, text message, the text of element
The frame attribute of pattern and element.
Preferably, HTML element attribute list includes background color, border width, the color H TML elements of frame line
Text, text font, the width of HTML element, the height of HTML element, HTML element is apart from the distance of screen left frame, HTML
Element is apart from the distance of screen upper side frame, the background of HTML element, the address of background.
Preferably, also comprise the following steps between step (1-4) and step (1-5)：
In order to ensure to export the copyright of picture, copyright watermark is drawn according to canvas painting canvas drawing rule.
Preferably, include the property content of two HTML elements in each HTML element attribute list.
Therefore, the present invention has the advantages that：Other instruments are needed not rely on, solve Web page screen-cutting to third party
The technical problem that instrument relies on；The whole or need content that the picture that the present invention is intercepted can include the webpage to be intercepted, are solved
Determine dependence of the current screenshotss instrument to screen viewing area；The picture that the present invention is intercepted can highly reduce image quality；The present invention
The picture of interception can be preserved only with text, save shelf space, also be beneficial to propagate.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the present invention.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1 is a kind of Web page screen-cutting method based on web technology, is comprised the following steps：
1. the routine interface of web page browser is called to obtain each HTML (HyperText for the webpage for needing to intercept
Markup Language, HTML) element, HTML element here, HTML element include div elements, canvas
Element, image elements and ul elements, above-mentioned div elements are web page area isolated marks, for Placement Problems, image, and form,
Canvas elements are the HTML markup elements with javascript programming language graphing images, and image elements are to be used for
The mark of picture is placed on webpage, ul is list mark element.
2. browser program interface is called to parse the attribute of the HTML element obtained in 1 step, the attribute bag of HTML element
Include background color, background picture, position, text message, the text style of element, the frame attribute of element.If calling browses
Device routine interface detects that HTML element includes sub- HTML element, treats that current HTML element continues parsing after being parsed
HTML element, and current resolving is constantly repeated, untill all HTML elements and sub- HTML element are all parsed,
The attribute being parsed saves as orderly HTML element attribute list, and HTML element attribute column tableau format is,
[{background：' #fff ', border：' lpx solid red ', ' fontSize '：' 14px ', text：' text ',
width：' 20px ', height：' 10px ', left：' 20px ', top：' 20px ' }, { background：' #fff ',
backgroundImage：' url (x.jpg) ', border：' lpx solid red ' }], the category of each of which HTML element
Property be parsed after content all preserved with a pair of braces { }, the collection of whole element properties shares bracket [] preservation.This reality
The listings format for applying example saves the attribute of two HTML elements, wherein background：' #fff ' represents the back of the body of HTML element
Scape color is white, border：' lpx solid red ' represent that the border width of HTML element is 1 pixel, the face of frame line
Color is solid line, and the color of frame is red, text：' text ' represents that the text of HTML element is text, ' fontSize '：’
14px ' represents that test font size is 14 pixels, width：' 20px ', height：' 10px ' represents the width of HTML element
It is highly 10 pixels, left for 20 pixels：' 20px ', top：' 20px ' represents HTML element apart from screen left frame
Distance is 20 pixels, and the distance apart from screen upper side frame is 20 pixels, backgroundImage：' url (x.jpg) ' table
The background for showing element is picture, and the address of picture is url (x.jpg).
3. browser program interface is called to create HTML (HyperText Markup Language, a hypertext markup
Language) canvas painting canvas.
4. calling browser program interface scan round HTML element attribute list, there is picture resource to link url in list
(x.jpg), call browser program interface to send network request to Load Image x.jpg, after the completion for the treatment of resource loading, utilize
Canvas painting canvas drawing rules, html attribute content is plotted on canvas painting canvas, in the present embodiment, in attribute list
One element draws one wide 20 pixel according to drawing rule, and high 20 pixel, background color is white, text test, text
Size is 14 pixels, and frame is the figure of 1 pixel red solid line, according to this process successively by the content in attribute list according to
Canvas drawing rules are drawn one by one, above-mentioned canvas drawing rules refer to call browser canvas routine interfaces according to
A kind of method of family demand graphing.In order to ensure the copyright of figure export picture during this, can be drawn according to canvas
Cloth drawing rule draws copyright watermark.
5. call character string of the routine interface of canvas painting canvas by the content transformation drawn in step 4 for base64 codings
Preserve.
6. by way of adding button on the page, such as "<button>Download current page screenshotss</button>", when
When user clicks on button, the content in step 5 is saved on local memory device in the form of picture using browser.It is foregoing
Storage device include USB flash disk, read-only storage, mobile hard disk etc. and have on the medium of store function.
The invention provides a kind of method of web page screenshotss, it is necessary to illustrate, in the step that the flow chart of accompanying drawing is shown
Suddenly can be performed in the computer system of executable instruction, also, in some cases, can be suitable to the part in flow chart
Sequence adjusts.
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (6)
1. a kind of Web page screen-cutting method based on web technology, it is characterized in that, comprise the following steps：
(1-1) calls the routine interface of web page browser to obtain each HTML element for the webpage to be intercepted；
(1-2) calls the attribute of each HTML element of browser program interface parsing, if detecting current HTML element bag
Containing sub- HTML element, treat that current HTML element continues to parse sub- HTML element after being parsed, and constantly repeat current
Resolving, untill all HTML elements and sub- HTML element are all parsed, the attribute being parsed is saved as
The HTML element attribute list of sequence；
(1-3) calls one HTML of browser program interface establishment canvas painting canvas；
(1-4) calls browser program interface scan round HTML element attribute list, has picture in HTML element attribute list
Resource link url, picture resource link url call browser program interface to send network request and Loaded Image x.jpg, treat resource
After the completion of loading, using canvas painting canvas drawing rules, the html attribute content in HTML element attribute list is plotted to
On canvas painting canvas；
The canvas painting canvas transform coding completed is base64 character strings by the routine interface of (1-5) calling canvas painting canvas
And preserve, obtain the canvas painting canvas of character string forms；
(1-6) guides user to download canvas painting canvas by way of adding button on the page, when the user clicks on a button, profit
Canvas painting canvas is saved on local memory device in the form of picture with browser.
2. the Web page screen-cutting method according to claim 1 based on web technology, it is characterized in that, HTML element is 4, point
Wei not div elements, canvas elements, image elements and ul elements.
3. the Web page screen-cutting method according to claim 1 based on web technology, it is characterized in that, the attribute bag of HTML element
Include background color, background picture, position, text message, the text style of element and the frame attribute of element.
4. the Web page screen-cutting method according to claim 1 based on web technology, it is characterized in that, HTML element attribute list
Including background color, border width, the text of the color H TML elements of frame line, text font, the width of HTML element, HTML
The height of element, HTML element is apart from the distance of screen left frame, and HTML element is apart from the distance of screen upper side frame, HTML element
Background, the address of background.
5. the Web page screen-cutting method according to claim 1 based on web technology, it is characterized in that, step (1-4) and step
Also comprise the following steps between (1-5)：
In order to ensure to export the copyright of picture, copyright watermark is drawn according to canvas painting canvas drawing rule.
6. the Web page screen-cutting method based on web technology according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, each
Include the property content of two HTML elements in HTML element attribute list.
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| CN108595304A (en) * | 2018-04-19 | 2018-09-28 | 腾讯科技（深圳）有限公司 | Web monitor method and device |
| CN108959509A (en) * | 2018-06-27 | 2018-12-07 | 中国建设银行股份有限公司 | Webpage watermark processing method, device and electronic equipment |
| CN109284045A (en) * | 2018-09-13 | 2019-01-29 | 武汉轻工大学 | It is a kind of that element screenshot method and device are pressed based on browser plug-in |
| CN109783759A (en) * | 2019-01-15 | 2019-05-21 | 北京智融网络科技有限公司 | Page screenshot automatic generating method, equipment and readable storage medium storing program for executing |
| CN109783102A (en) * | 2019-01-18 | 2019-05-21 | 北京城市网邻信息技术有限公司 | Method, apparatus, equipment and the storage medium that Canvas painting canvas generates in a kind of small routine |
| CN109948123A (en) * | 2018-11-27 | 2019-06-28 | 阿里巴巴集团控股有限公司 | A kind of image combining method and device |
| CN111223032A (en) * | 2018-11-23 | 2020-06-02 | 浙江大学 | Watermark embedding method, watermark extracting method, watermark embedding device, watermark extracting equipment and data processing method |
| CN111309671A (en) * | 2019-12-04 | 2020-06-19 | 珠海派诺科技股份有限公司 | Method, device and storage medium for exporting PDF (Portable document Format) of web report |
| CN111694493A (en) * | 2020-06-08 | 2020-09-22 | 杭州有赞科技有限公司 | Webpage screenshot method, computer equipment and readable storage medium |
| CN112306619A (en) * | 2020-12-02 | 2021-02-02 | 广州橙行智动汽车科技有限公司 | Screenshot method and device |
| CN112579947A (en) * | 2019-09-29 | 2021-03-30 | 北京国双科技有限公司 | Webpage element graph intercepting method and device and electronic equipment |
| CN112784202A (en) * | 2021-02-03 | 2021-05-11 | 中国电子科技集团公司第二十八研究所 | Method for improving definition of webpage screenshot based on WEB technology |
| EP3883256A4 (en) * | 2018-11-20 | 2022-03-23 | Wangsu Science & Technology Co., Ltd. | Live stream processing method in webrtc and stream pushing client |
| CN115809387A (en) * | 2022-11-29 | 2023-03-17 | 四川虹魔方网络科技有限公司 | Webpage element screenshot realization method based on SVG |
| CN117076811A (en) * | 2023-10-13 | 2023-11-17 | 腾讯科技（深圳）有限公司 | Webpage export method, device, equipment and storage medium |
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| CN108595304B (en) * | 2018-04-19 | 2022-12-27 | 腾讯科技（深圳）有限公司 | Webpage monitoring method and device |
| CN108595304A (en) * | 2018-04-19 | 2018-09-28 | 腾讯科技（深圳）有限公司 | Web monitor method and device |
| CN108959509A (en) * | 2018-06-27 | 2018-12-07 | 中国建设银行股份有限公司 | Webpage watermark processing method, device and electronic equipment |
| CN109284045B (en) * | 2018-09-13 | 2021-11-05 | 武汉轻工大学 | Element-based screenshot method and device based on browser plug-in |
| CN109284045A (en) * | 2018-09-13 | 2019-01-29 | 武汉轻工大学 | It is a kind of that element screenshot method and device are pressed based on browser plug-in |
| EP3883256A4 (en) * | 2018-11-20 | 2022-03-23 | Wangsu Science & Technology Co., Ltd. | Live stream processing method in webrtc and stream pushing client |
| CN111223032A (en) * | 2018-11-23 | 2020-06-02 | 浙江大学 | Watermark embedding method, watermark extracting method, watermark embedding device, watermark extracting equipment and data processing method |
| CN109948123A (en) * | 2018-11-27 | 2019-06-28 | 阿里巴巴集团控股有限公司 | A kind of image combining method and device |
| CN109948123B (en) * | 2018-11-27 | 2023-06-02 | 创新先进技术有限公司 | Image merging method and device |
| CN109783759A (en) * | 2019-01-15 | 2019-05-21 | 北京智融网络科技有限公司 | Page screenshot automatic generating method, equipment and readable storage medium storing program for executing |
| CN109783102A (en) * | 2019-01-18 | 2019-05-21 | 北京城市网邻信息技术有限公司 | Method, apparatus, equipment and the storage medium that Canvas painting canvas generates in a kind of small routine |
| CN109783102B (en) * | 2019-01-18 | 2022-04-12 | 北京城市网邻信息技术有限公司 | Method, device, equipment and storage medium for generating Canvas in applet |
| CN112579947A (en) * | 2019-09-29 | 2021-03-30 | 北京国双科技有限公司 | Webpage element graph intercepting method and device and electronic equipment |
| CN111309671B (en) * | 2019-12-04 | 2023-01-31 | 珠海派诺科技股份有限公司 | Method and device for exporting PDF (Portable document Format) from web report and storage medium |
| CN111309671A (en) * | 2019-12-04 | 2020-06-19 | 珠海派诺科技股份有限公司 | Method, device and storage medium for exporting PDF (Portable document Format) of web report |
| CN111694493B (en) * | 2020-06-08 | 2022-05-31 | 杭州有赞科技有限公司 | Webpage screenshot method, computer equipment and readable storage medium |
| CN111694493A (en) * | 2020-06-08 | 2020-09-22 | 杭州有赞科技有限公司 | Webpage screenshot method, computer equipment and readable storage medium |
| CN112306619A (en) * | 2020-12-02 | 2021-02-02 | 广州橙行智动汽车科技有限公司 | Screenshot method and device |
| CN112784202A (en) * | 2021-02-03 | 2021-05-11 | 中国电子科技集团公司第二十八研究所 | Method for improving definition of webpage screenshot based on WEB technology |
| CN112784202B (en) * | 2021-02-03 | 2022-10-04 | 中国电子科技集团公司第二十八研究所 | Method for improving definition of webpage screenshot based on WEB technology |
| CN115809387A (en) * | 2022-11-29 | 2023-03-17 | 四川虹魔方网络科技有限公司 | Webpage element screenshot realization method based on SVG |
| CN117076811A (en) * | 2023-10-13 | 2023-11-17 | 腾讯科技（深圳）有限公司 | Webpage export method, device, equipment and storage medium |
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Address after: 310000 Rooms 103-27, Building 19, No. 1399, Liangmu Road, Cangqian Street, Yuhang District, Hangzhou, Zhejiang Patentee after: Hangzhou Meichuang Technology Co.,Ltd. Address before: 12 / F, building 7, Tianxing International Center, 508 Fengtan Road, Gongshu District, Hangzhou City, Zhejiang Province 310011 Patentee before: HANGZHOU MEICHUANG TECHNOLOGY CO.,LTD. |