Programmatic Python Browser with JavaScript

问题

I want to screen-scrape a web-site that uses JavaScript.

There is mechanize, the programmatic web browser for Python. However, it (understandably) doesn't interpret javascript. Is there any programmatic browser for Python which does? If not, is there any JavaScript implementation in Python that I could use to attempt to create one?

回答1:

You might be better off using a tool like Selenium to automate the scraping using a web browser, so the JS executes and the page renders just like it would for a real user.

回答2:

The PyV8 package nicely wraps Google's V8 Javascript engine for Python. It's particularly nice because not only can you call from Python to Javascript code, but you can call back from Javascript to Python code. This makes it quite straightforward to implement the usual browser-supplied objects (that is, everything in the Javascript global namespace: "window", "document", and so on), which you'd need to do if you were going to make a Javascript-capable Python browser emulator thing, possibly by hooking this up with mechanize.

回答3:

My favorite is PyPhantomJS. It's written using Python and PyQt4. It's completely headless and you can control it completely from JavaScript.

However, if you are looking to actually see the page, you can use QWebView from PyQt4 as well.

回答4:

There is also spynner " a stateful programmatic web browser module for Python with Javascript/AJAX support based on the QtWebkit framework" : http://code.google.com/p/spynner/

回答5:

You could also try defining Chickenfoot page triggers on the pages in question, executing whatever operations you want on the page and saving the results of the operation to a local file, and calling Firefox from the command line inside your program, followed by reading the file.

回答6:

i recommend that you take a look at some of the options available to you at http://wiki.python.org/moin/WebBrowserProgramming - surprisingly this is coming up as a common question (i've found three on stackoverflow today, by searching for the words "python browser" on google). if you do the same you'll find the other answers i gave.