httprouter is a high-performance HTTP request router for Go that maps incoming network requests to specific handler functions using a radix tree. It functions as a request dispatcher and path parameter parser, organizing URL paths in a tree structure to ensure efficient lookups.
The router specializes in capturing dynamic segments and catch-all wildcards from URL paths to pass directly into request handlers. It implements method-specific routing and automatically manages responses for unsupported HTTP methods.
The library covers broader capabilities including request normalization through trailing-slash redirects, static asset serving by mapping paths to the file system, and middleware integration for recovering from request panics.