Large Scale Web Scraping

1. www.websitedatascraping.com Large Scale Web Scraping E-mail: info@websitedatascraping.com Skype: nprojectshub

2. Is it all about proxies? • Oftentimes the emphasis is on proxies to get around antibots. But the logic of the scraper is important too. It is fairly intertwined. • Using good quality proxies is surely important. If you use blacklisted proxies, even the best scraper logic will not yield good results. • However, a good circumvention logic of the scraper that is in tune with the requirement of the website is equally important. • Over the years, antibots have shifted from server-side validation to client-side validation where they look at JavaScript and browser fingerprinting, etc… • So really, it depends a lot on the target website. Most of the time, decent proxies combined with good crawling knowledge and accrual strategy should do the trick and deliver acceptable results.

3. When you start getting blocks... • Thus, the first thing before even starting a web scraping project is to understand the website you are trying to scrape. Your crawls should be well under the total number of users that a website has the infrastructure to successfully serve and never exceed the number of resources the website has. Staying respectful to the website will take you a long way for your scraping project. • If you are still getting banned, here are a few basic checkpoints: • Check if your headers are able to mimic real-world browsers. • The next step would be to check if the website has enabled geo-blocking. Using region-specific proxies may help here. • Residential proxies may be useful in case the website is blocking data center proxies. • Then it comes down to your crawl strategy. You should be careful before hitting the predicted ajx or mobile endpoints and try to be organic and follow the site-map. • If you start getting white-listed sessions, leverage those by creating a good cookie handling and session management strategy. • Most of the websites vigorously check for browser fingerprints and employ JavaScript in a big way so your infrastructure should be designed to handle those challenges.

4. Dealing with captchas • The best thing to do against captchas is to ensure that you don't even get a captchas. • Scraping politely might be enough in your case. • If not, then using different types of proxies, regional proxies, and efficiently handling JavaScript challenges can reduce the chances of getting a captchas. • Despite all the efforts, if you still get a captchas, you could try third party solutions or design a simple solution yourself to handle easy captchas. -: If you have any other query then visit our website or send message on email:- http://www.websitedatascraping.com/ info@websitedatascraping.com