With the basics of HTTP out of the way, let's get acquainted with the tools we'll use in this book to demonstrate how HTTP works. This section goes through a few tools you'll need to follow along. Note that you only need one of the tools listed. It is important to note that you will be able to follow this book regardless of what tool you use, so pick one that you're comfortable with and get started!
We'll make heavy use of Graphical HTTP tools throughout this book. There are lots of options available in this category of HTTP tools, and we'll be using Paw 3. Although it's a paid App in the Mac App Store, there is a limited Trial version as well which can get you through the book.
curl is a free command line tool that is used to issue HTTP requests.
It is shipped with OS X and most GNU/Linux distributions, and you can simply invoke it on the command line by issuing the command below.
$ curl www.google.com
If you have version 1803 or later of Windows 10, cURL should be installed by default. If you have an earlier version of windows or cannot find cURL on your version, we recommend installing a GUI version of cURL. You won't be able to execute the command line commands, but you should still be able to perform the appropriate actions in the GUI.