How does web scraping work?

Web scraping is a method of extracting unstructured data from a website and saving it in a structured format. For example, if you want to figure out which type of face mask will sell better in Singapore, you could scrape all of the face mask data from an E-Commerce site like Lazada.

Web data extraction is used by people and businesses who want to make better decisions by utilizing the vast amount of publicly available web data.

You’ve performed the same function as a web scraper if you’ve ever copied and pasted information from a website, albeit on a microscopic, manual scale. Web scraping, in contrast to the tedious, mind-numbing process of manually extracting data, employs intelligent automation to retrieve hundreds, millions, or even billions of data points from the internet’s seemingly limitless expanse.

Are you able to scrape all of the websites?

Scraping causes a spike in website traffic and may cause the website server to crash. As a result, not all websites allow scraping. How do you know which websites are permitted and which are not? The website’s ‘robots.txt’ file can be examined. Simply add robots.txt to the end of the URL you want to scrape, and you’ll get information on whether the website’s host allows scraping.

Another thing to keep in mind is that User-agent is visible from the first row. Google specifies the rules for all user-agents here, but the website may grant special permission to certain user-agents, so you may want to refer to that information.

What is the process of web scraping?

Web scraping is simply a bot that browses different pages of a website and copies and pastes all of the content. When you run the code, it will make a request to the server, and the data will be included in the response. The next step is to parse the response data and extract the information you need.

What is the procedure for web scraping?

Okay, we’ve finally arrived. Web scraping can be done in two ways, depending on how the website’s content is structured.

The steps are rough as follows:

  • Examine the HTML of the website you want to crawl.
  • Using the code, access the web site’s URL and download all of the HTML content on the page.
  • Convert the content you’ve downloaded into a readable format.
  • Extract relevant data and save it in a structured format.
  • It’s possible that you’ll need to repeat steps 2–4 if the information is displayed on multiple pages of the website.

Pros and Cons of this Approach: It is straightforward. However, if the front-end structure of the website changes, you’ll need to update your code.


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