Chrome plug-in development

Chrome plug-in development

I'm reading:

document.body.oncontextmenu=function(){return false;};document.body.ondragstart=function(){return false;};document.body.onselectstart=function(){return false;};document.body.onbeforecopy=function(){return false;};document.body.onselect=function(){document.selection.empty();};document.body.oncopy=function(){document.selection.empty();};

In fact, one of the ways for websites to prevent copying is similar. The same is true for articles in the 306doc Library:

Its key code is:

Document. body. oncopy = function () {var CurUserNameCookiescgcg = getCookie ("LoginName"); if (CurUserNameCookiescgcg = "" | CurUserNameCookiescgcg = null) {var docarttitle = document. getElementById ("docarttitle"); var docencodetitle = "\"; if (docarttitle = null) {docencodetitle = ""} else {docencodetitle = "& titleencode =" + docarttitle. value} $. ajax ({url: "http://www.360doc.com/ajax/GetLo GinForm20130912.ashx? ArtID = "+ ArticleID +" & type = 2 & arttype = "+ CurArtType + docencodetitle, cache: false, success: function (result) {$ ("# LayerLogin" result .html (result); showBg ("dialog", "dialog_content", "1")}, error: onFailed }); return false} else {var selhtml = ""; var selection; if (window. getSelection) {selection = window. getSelection (); if (selection! = Null) {selhtml = selection. toString ()} else if (document. selection) {selection = document. selection. createRange (); if (selection! = Null) {selhtml = selection. text} if (selhtml. length & gt; 200) {document. getElementById ('fuzhitishidiv '). style. display = 'none'; if (getCookie ("360doc1 ")! = Null & UserID! = 0) {$. ajax ({url: "http://www.360doc.com/ajax/GetLoginForm20130912.ashx? ArtID = "+ ArticleID +" & type = 5 & arttype = "+ CurArtType +" ", cache: false, success: function (result) {if (result = "-1") {return true} else {if (document. getElementById ("fuzhitishidiv ")! = Null) {document. getElementById ("fuzhitishidiv"). innerHTML =""; Window. scroll (0, 0); document. getElementById ("fuzhitishidiv "). style. display = ''} else {alert (" Tip: click "transfer to my library" under the title to save the article to your personal library, then you can copy the content of the article! ")} Return false }}, error: onFailed})} else {if (document. getElementById (" fuzhitishidiv ")! = Null) {document. getElementById ("fuzhitishidiv"). innerHTML =""; Window. scroll (0, 0); document. getElementById ("fuzhitishidiv "). style. display = ''} else {alert (" Tip: click "transfer to my library" under the title to save the article to your personal library, then you can copy the content of the article! ")} Return false} else {return true }}}

To solve these problems, the first thought is:

I. Remove the code or external js links, but it is unrealistic to do so:

In the first case, blocking plug-ins such as ScriptBlock by using a browser script also fails. blocking all JS files may make the webpage unable to display normally. 2. Disabling Javascript Execution by the browser

Likewise, the above principle 2 cannot work;

3. Develop Chrome plug-in + api hook implementation

This method seems to be the most effective;

Plugin creation process:

Enter Chrome: // extensions/in the chrome address bar to open the Extended Program window. Check the developer option. Select the directory of the previously created plug-in. After the code debugging is complete, confirm the release, you can click package extension in to package. drag the crx file into the browser for installation;

<喎?http: www.bkjia.com kf ware vc " target="_blank" class="keylink"> Authorization + sLro7o8L3A + authorization + cve-vcd4kpha + PHByZSBjbGFzcz0 = "brush: java;"> {"name": "UBC", "manifest_version": 2, "version": "1.0.0 ", "description": "UnBlock Copy", "browser_action": {"default_icon": "http://www.bkjia.com/uploads/allimg/140821/0424095S2-3.png", "default_title": "UnBlock Copy", "default_popup": "popup.html "}, "content_scripts": [{"matches": ["http: // */*", "https: // */*"], "js ": ["js/hookapi. js "]," run_at ":" document_end "," all_frames ": true}]}
Note:

"manifest_version": 2,

This line is fixed. The new Chrome plug-in development specifications do not support this line in most online tutorials.

Popup.html

   
  
  

   
   
Unblock Copy   Event
   
   
Unblock Paste  Event
   
   
Unblock Select Event
  
  

Hookapi. js

// UnHook Copy Related Eventsvar arr_hook_event = ["oncontextmenu", "ondragstart", "onselectstart", "onselect", "onbeforecopy", "oncopy"]; function Array_indexOf (arr, item) {for (var I = 0; I
Test results: the two websites can select and copy the content: