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Go Web Scraping Quick Start Guide

You're reading from Go Web Scraping Quick Start Guide Implement the power of Go to scrape and crawl data from the web

Product type Paperback

Published in Jan 2019

Publisher Packt

ISBN-13 9781789615708

Length 132 pages

Edition 1st Edition

Languages

Go

Tools

golearn

Concepts

Data Analysis

Author (1):

Vincent Smith

View More author details

Table of Contents (10) Chapters

Preface

1. Introducing Web Scraping and Go FREE CHAPTER

2. The Request/Response Cycle

3. Web Scraping Etiquette

4. Parsing HTML

5. Web Scraping Navigation

6. Protecting Your Web Scraper

7. Scraping with Concurrency

8. Scraping at 100x

9. Other Books You May Enjoy

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What is a User-Agent string?

When an HTTP client makes a request to a web server, they identify who they are. This holds true for web scrapers and normal browsers alike. Have you ever wondered why a website knows that you are a Windows or a Mac user? This information is contained inside your User-Agent string. Here is an example User-Agent string for a Firefox browser on a Linux computer:

Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0

You can see that this string identifies the family, name, and version of the web browser, as well as the operating system. This string will be sent with every request from this browser inside of a request header, such as the following:

GET /index.html HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0

Not all User-Agent strings contain this much information. HTTP clients...

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Authors (1)

Smith

Smith

William Smith has been writing software since 1988, but he began his professional career in the environmental field with degrees in Environmental Science and Business Administration. While working in this field, William continued writing software as a hobbyist before returning to the University of Maryland for a degree in Computer Science. William currently works as an independent software engineer and author. He is the owner of Appsmiths LLC, a development and consulting firm concentrating on mobile application and game development using native tools as well as cross-platform tools, such as Xamarin and Monogame. William lives in rural West Virginia with his beautiful wife and four sons, where they enjoy hunting, fishing, and camping as a family.

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