sprayRewrite

sprayRewrite is a Scala library designed to facilitate request rewriting within the Spray web framework. It provides a set of tools and directives for manipulating incoming HTTP requests before they are processed by the application's routing logic. This can be useful for various purposes, such as URL normalization, redirecting old URLs to new ones, or modifying request headers.

The core functionality of sprayRewrite revolves around the concept of a "rewrite rule." A rewrite rule defines a pattern to match against an incoming request's URI and a transformation to apply if the pattern is matched. These rules can be chained together, allowing for complex rewriting scenarios. For instance, one rule might remove a trailing slash from a URL, while another redirects requests to a specific path to a different resource.

sprayRewrite integrates seamlessly with Spray's directive-based routing DSL. Developers can incorporate rewrite rules directly into their route definitions, enabling them to control how requests are handled at a granular level. The library supports different types of matching, including exact path matching, regular expression matching, and case-insensitive matching.

Common use cases for sprayRewrite include implementing SEO-friendly URL structures, handling deprecated API endpoints by redirecting them to their updated versions, and ensuring consistent URL formatting across an application. By providing a flexible and composable way to modify requests, sprayRewrite helps developers maintain cleaner code and improve the user experience of their web applications built with Spray.