我可以通过Javascript从另一个网页中获取特定页面的HTML代码吗？

Question

I've read about how there are multiple methods to grabbing source code from another webpage via jQuery or using Cross-Domain Requests. What I want to try and do is make it so I grab a div that has different code each time a page is loaded and not the source code as a whole. So for example, the greater detail you see when you use 'inspect element' or a tool like firebug to dive deeper into the page code.

Would I be using one of the same methods?

Answer 1

Yes.

If you control BOTH domains you can add the Access_control_CORS header to allow access of cross domain requests and use a headless browser like phantomJS to grab a cached version of rendered HTML page.

If you don't control both domains you will have to write a server side proxy to grab the page and all its resources (you will have to parse the page to get or rewrite links to images, javascripts, stylesheets etc...) then run it through phantomJS to create a HTML snapshot.`

source:

https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy
https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
http://phantomjs.org/

NOTE: despite my best efforts, stack overflow is absolutely convinced these links are code. Sorry for posting as code.