You’ll be reinventing the wheel, to be sure. But here’s the basics: A list of unvisited URLs – seed this with one or more starting pages A list of visited URLs – so you don’t go around in circles A set of rules for URLs you’re not interested in – so you don’t index the … Read more
Check out dive written in golang. Awesome tool!
As you mentioned in your question it takes too much time to load the whole page(especially when some resource is unavailable) is pretty much possible if the Application Under Test (AUT) uses JavaScript or AJAX Calls. In your first scenario you have induced both set_page_load_timeout(5) and set_script_timeout(5) set_page_load_timeout(time_to_wait) : Sets the amount of time to … Read more
Edit I’ve made a python library to scrape tableau dashboard. The implementation is more straightforward : from tableauscraper import TableauScraper as TS url = “https://public.tableau.com/views/Colorado_COVID19_Data/CO_Home” ts = TS() ts.loads(url) dashboard = ts.getDashboard() for t in dashboard.worksheets: #show worksheet name print(f”WORKSHEET NAME : {t.name}”) #show dataframe for this worksheet print(t.data) run this on repl.it Old answer … Read more
Ruby’s Capybara is an integration test library, but it can also be used to write stand-alone web-crawlers. Given that it uses backends like Selenium or headless WebKit, it interprets javascript out-of-the-box: require ‘capybara/dsl’ require ‘capybara-webkit’ include Capybara::DSL Capybara.current_driver = :webkit Capybara.app_host = “http://www.google.com” page.visit(“https://stackoverflow.com/”) puts(page.html)
HttpWebRequest may be taking a while to detect your proxy settings. Try adding this to your application config: <system.net> <defaultProxy enabled=”false”> <proxy/> <bypasslist/> <module/> </defaultProxy> </system.net> You might also see a slight performance gain from buffering your reads to reduce the number of calls made to the underlying operating system socket: using (BufferedStream buffer = … Read more
JavaScript is handled by both Bing and Google crawlers. Yahoo uses the Bing crawler data, so it should be handled as well. I didn’t look into other search engines, so if you care about them, you should look them up. Bing published guidance in March 2014 as to how to create JavaScript-based websites that work … Read more
There are two general ways to detect robots and I would call them “Polite/Passive” and “Aggressive”. Basically, you have to give your web site a psychological disorder. Polite These are ways to politely tell crawlers that they shouldn’t crawl your site and to limit how often you are crawled. Politeness is ensured through robots.txt file … Read more
You said matching the user agent on ‘bot’ may be awkward, but we’ve found it to be a pretty good match. Our studies have shown that it will cover about 98% of the hits you receive. We also haven’t come across any false positive matches yet either. If you want to raise this up to … Read more