Web使用动态javascript内容抓取网站

Question

So I'm using python and beautifulsoup4(which i'm not tied to) to scrape a website. Problem is when I use urlib to grab the html of a page it's not the entire page because some of it is generated via the javascript. Is there any way to get around this?

Answer 1

There are basically two main options to proceed with:

• using browser developer tools, see what ajax requests are going to load the page and simulate them in your script, you will probably need to use json module to load the response json string into python data structure
• use tools like selenium that open up a real browser. The browser can also be "headless", see Headless Selenium Testing with Python and PhantomJS

The first option is more difficult to implement and it's, generally speaking, more fragile, but it doesn't require a real browser and can be faster.

The second option is better in terms of you get what any other real user gets and you wouldn't be worried about how the page was loaded. Selenium is pretty powerful in locating elements on a page - you may not need BeautifulSoup at all. But, anyway, this option is slower than the first one.

Hope that helps.