I’m building an app on Google App Engine that needs to read web pages, parse them, and generate stats. I’m looking for a good headless browser solution that works with GAE. Does anyone know of any options?
I’ve heard about HTMLUnit, but I’m not sure if it’s compatible with GAE. Are there any alternatives that would work well for web scraping and analysis on App Engine?
My main requirements are:
Ability to load and render web pages
JavaScript support
DOM manipulation
Works within GAE restrictions
Any suggestions or experiences using headless browsers on App Engine would be really helpful. I’m open to different approaches if a full browser isn’t possible. Thanks!
I’ve had success using Selenium with ChromeDriver on GAE. You’ll need to set up a custom runtime and include the necessary binaries. It provides full browser capabilities including JavaScript execution and DOM manipulation. However, be mindful of GAE’s resource limits and execution time constraints. You may need to optimize your scraping logic and implement caching strategies to work within those boundaries. Another option to consider is using a third-party API service that handles the heavy lifting of web scraping externally, then process the results within your GAE app. This approach can be more scalable and avoids some of the sandbox limitations.
hey, i’ve used phantomjs on gae before and it worked pretty well. it’s headless and supports javascript. you might need to set it up as a custom runtime tho. there’s also some limitations with gae’s sandbox, so watch out for that. good luck with ur project!
I’ve actually tackled a similar challenge recently. While headless browsers can be tricky on GAE, I found HtmlUnit to be a decent compromise. It’s lightweight, Java-based, and works within GAE’s constraints.
HtmlUnit simulates a browser environment, handles JavaScript, and allows DOM manipulation. It’s not a full browser, but it gets the job done for most scraping tasks. The key is to configure it properly - disable CSS and image loading to save resources.
One caveat: complex JavaScript-heavy sites might give HtmlUnit trouble. In those cases, I’ve had to fall back to using external services or running scraping jobs on separate infrastructure.
Performance-wise, HtmlUnit is quite fast compared to full browsers. This helps stay within GAE’s execution time limits. Just remember to implement proper error handling and retries for reliability.