REST Constraint #6: Code on Demand—When, Why, and How to Use It

REST Constraint #6: Code on Demand—When, Why, and How to Use It

Of all the REST constraints, Code on Demand is the one that most developers either overlook or actively avoid. Unlike the other five constraints, it is the only optional one, meaning a RESTful system doesn’t have to use it. But when applied correctly, it can unlock powerful capabilities in web applications. Let’s explore what Code on Demand is, when it makes sense to use it, and why most REST APIs don’t rely on it.

REST Constraint #5: Embracing Layers for Flexibility and Scale

REST Constraint #5: Embracing Layers for Flexibility and Scale

Building a reliable, scalable web application is no easy feat. The internet is unpredictable, traffic surges happen, and security threats lurk around every corner. That’s why REST includes the Layered System constraint—a design principle that structures applications into multiple layers, each handling a specific role. Whether it’s distributing traffic, securing data, or managing services, layering helps RESTful systems stay resilient and adaptable.

REST Constraint #4: Cacheable for Better Performance

REST Constraint #4: Cacheable for Better Performance

The internet is fast—until it’s not. Nobody likes waiting for a sluggish API response, and overloaded servers don’t help either. That’s where caching comes in. RESTful APIs embrace caching to improve performance, reduce server load, and create a smoother user experience. But caching isn’t just about speed—it’s about efficiency. Let’s dive into how REST makes caching an essential part of scalable web applications.