DPC2021: HTTP Patterns: PSR 7 & 15 By Example - Tim Lytle
Chances are your code already uses one of the HTTP PSRs in some way. In this 'no slides, just code' session we'll take a hands on look at how HTTP Messages (PSR-7) and HTTP Handlers (PSR-15) work, and how they can be properly leveraged.
HTTP messages provide a considerable advantage over global variables, and their immutability actually makes it easier to confidently modify an incoming request or an outgoing response in your web application.
HTTP handlers are a common concept in micro-frameworks, and PSR-15 provides a way to create reusable framework-agnostic code. But that's not all it provides. The HTTP handler interface can be used to inject the concept of middleware into an existing application without having to introduce a new framework. Or to easily build a lightweight application without any framework.
Take a guided tour through both PSRs, and find out how you can used them effectively in your current codebase.
What you'll learn from this talk:
the value in immutable HTTP Request objects
how to evolve an HTTP Request object
how to extend a library's HTTP Request object
how a middleware stack works
how easy it is to use PSR-7 & PSR-15 without any framework
This talk was given at the Dutch PHP Conference in 2021, organised and hosted by Ibuildings. Visit https://phpconference.nl or https://ibuildings.nl for more information.