Proxy blacklist daily updating script
– either by banning all accesses from a particular IP or by banning all accesses that use a specific id to access the server (most browsers and web spiders identify themselves whenever they request a page by user agents.
Chrome browser for example uses The banning can be temporary or permanent. Permanent bans go against the open nature of the Internet but some sites resort to this “scorch the internet” measure.
Imagine a life without Google, because Google also uses web scraping/crawling to get almost all its data.
Without Google and web scraping, we would never find all the wonderful sites and information and the Internet would not be as indispensable as it is today.
Phantom JS, and the latest entrant – Google’s own headless chrome are some options to explore further.
Keep in mind that headless browsers use a lot of resources (RAM, CPU, Bandwidth etc) in comparison to script based approaches.
All these ideas above provide a starting point for you to build your own solutions or refine your existing solution.
If you have any ideas or suggestions, please join the discussion in the comments section.
If a crawler performs multiple requests per second and downloads large files, an under-powered server would have a hard time keeping up with requests from multiple crawlers.