Considerations When Conducting Web Crawling

Web crawling, or web scraping, is an incredibly useful method for automatically collecting data from the internet, but it also comes with several legal and ethical responsibilities.

Many websites prohibit crawling to prevent server overload and clearly state these restrictions in their terms of service.

Ignoring these rules and proceeding with crawling can lead to legal disputes.

Moreover, if you plan to use the collected data for commercial purposes, you must comply with relevant laws, such as copyright laws.

Common rules for web crawlers are typically defined in a website's robots.txt file.

This file is located at the https://website.com/robots.txt path (for example, https://en.wikipedia.org/robots.txt) and specifies which pages web crawlers can and cannot access.

Here is a simple example of a robots.txt file:

Copy
User-agent: *
Disallow: /private/
Allow: /public/

In this example, all crawlers are prohibited from accessing the /private/ directory but are allowed to access the /public/ directory.

Adhering to the robots.txt file is a fundamental ethical practice in web crawling.

Ignoring this file and collecting all data from a website goes against the website operator's intentions and can be considered illegal.