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Go Web Scraping Quick Start Guide

Go Web Scraping Quick Start Guide

By : Smith
3.5 (2)
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Go Web Scraping Quick Start Guide

Go Web Scraping Quick Start Guide

3.5 (2)
By: Smith

Overview of this book

Web scraping is the process of extracting information from the web using various tools that perform scraping and crawling. Go is emerging as the language of choice for scraping using a variety of libraries. This book will quickly explain to you, how to scrape data data from various websites using Go libraries such as Colly and Goquery. The book starts with an introduction to the use cases of building a web scraper and the main features of the Go programming language, along with setting up a Go environment. It then moves on to HTTP requests and responses and talks about how Go handles them. You will also learn about a number of basic web scraping etiquettes. You will be taught how to navigate through a website, using a breadth-first and then a depth-first search, as well as find and follow links. You will get to know about the ways to track history in order to avoid loops and to protect your web scraper using proxies. Finally the book will cover the Go concurrency model, and how to run scrapers in parallel, along with large-scale distributed web scraping.
Table of Contents (10 chapters)
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Web Scraping Navigation

So far, this book has focused on retrieving information for a single web page. Although this is the basis of web scraping, it does not cover the majority of use cases. More than likely, you will need to visit multiple web pages, or websites, in order to collect all of the information to fulfill your needs. This may entail visiting many known websites directly via a list or URLs, or following links discovered in some pages to more unknown places. There are many different ways of navigating your scraper through the web.

In this chapter, we will cover the following topics:

  • How to follow links
  • How to submit forms with POST requests
  • How to track your history to avoid loops
  • The difference between breadth-first and depth-first crawling

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