Positioning advertisement code

Let's first position the logic of advertising on the page.

• Clue 1. Since the advertisement does not appear when the page is loaded, there must be an asynchronous method to load it;
• Clue 2: because every page is called, it is usually encapsulated in a js.

On the Druid main page, press F12, and you can see that the page references the following js file

<script src="js/lang.js" type="text/javascript" charset="utf8"></script>
<script src="js/common.js" type="text/javascript" charset="utf8"></script>

After checking one by one, it is found that the advertisement code exists in common.js.

Thirtieth elements

buildFooter : function() {
	var html ='<footer class="footer">'+
			  '    		<div class="container">'+
			  '<a href="https://render.alipay.com/p/s/taobaonpm_click/druid_banner_click" target="new"><img src="https://render.alipay.com/p/s/taobaonpm_click/druid_banner"></a><br/>' +
		  	  '	powered by <a href="https://github.com/alibaba/" target="_blank">AlibabaTech</a> & <a href="http://www.sandzhang.com/" target="_blank">sandzhang</a> & <a href="http://melin.iteye.com/" target="_blank">melin</a> & <a href="https://github.com/shrekwang" target="_blank">shrek.wang</a>'+
		  	  '			</div>'+
			  ' </footer>';
	$(document.body).append(html);
}

Delete ad code

At present, we can modify the return content of common.js through the Filter filter without changing the source code.

1. Judge whether the current path ends with / druid/js/common.js in Filter;
2. Get the content that the current file path should return;
3. Delete relevant code of advertisement and construct new content;
4. Return the new content to the foreground;

if(requestUrl.contains("/druid/js/common.js")){
    // Filter / druid/js/common.js path and replace the advertising code
    chain.doFilter(request, response);
    response.resetBuffer();
    // Get common file content
    String text = Utils.readFromResource("support/http/resources/js/common.js");
    // Regular expressions remove content between < footer class = "footer" > and < / footer >, including the footer itself
    text = text.replaceAll("<footer class=\"footer\">[^%]*</footer>", "");            
    // Return new content to front page
    response.getWriter().write(text);
}

After rerunning the code, visit druid/js/common.js, and you will find that the ad code is gone.

buildFooter : function() {
	var html ='';
	$(document.body).append(html);
},

At this time, I visited Druid's relevant page and found that there was no advertisement. It was a success!

Blog

https://my.oschina.net/gmarshal/blog/3074094

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