Implementing a Cookie Jar with Req in Elixir

In his blog post, Carlo Colombo discusses the creation of a straightforward cookie jar plugin for use with the Req library in Elixir, designed for handling cookie-based sessions during website automation or scraping. The plugin works by setting cookies using the 'set-cookie' header and ensuring they are included in subsequent request headers. Despite its basic design, the plugin serves the fundamental need of managing cookies within an Elixir environment. The blog provides a code snippet that illustrates how to initialize the cookie jar, attach the plugin to a Req instance, manage cookie storage and retrieval using Elixir's Agent module, and append necessary steps to the request and response processes for handling cookies.