October 2015
Beginner to intermediate
174 pages
3h 32m
English
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Summary
This chapter covered two approaches to scrape data from dynamic web pages. It started with reverse engineering a dynamic web page with the help of Firebug Lite, and then moved on to using a browser renderer to trigger JavaScript events for us. We first used WebKit to build our own custom browser, and then reimplemented this scraper with the high-level Selenium framework.
A browser renderer can save the time needed to understand how the backend of a website works, however, there are disadvantages. Rendering a web page adds overhead and so is much slower than just downloading the HTML. Additionally, solutions using a browser renderer often require polling the web page to check whether the resulting HTML from an event has occurred yet, which ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.