ZijianHe/koa-router
Koa Router
koa-router is a routing middleware for Koa applications that maps incoming HTTP requests to specific handler functions based on URL patterns and HTTP methods. It provides the foundation for organizing web endpoints and developing REST APIs by linking request paths to their corresponding controller actions.
The project enables the organization of complex endpoints through recursive router nesting, allowing multiple router instances to be mounted as middleware to create logical route hierarchies. It supports dynamic URL generation via named route mapping, which allows the creation of URL strings using identifiers rather than hardcoded paths.
The router includes capabilities for extracting and validating named URL parameters, regex-based path matching, and the management of middleware pipelines. It also handles method constraints, such as responding to OPTIONS requests and managing redirects.
Features
- HTTP Request Dispatching - Provides the primary mechanism for mapping incoming HTTP requests to specific handler functions based on URL and method.
- RESTful API Development - Provides the fundamental routing mechanisms required to build structured web services using standard HTTP methods and dynamic URL parameters.
- Route Parameter Injection - Extracts dynamic values from URL paths to provide them as accessible parameters within the request context.
- Recursive Router Mountings - Supports nesting router instances within others to create a hierarchical structure of endpoints.
- HTTP Request Routing - Maps incoming network paths and URL patterns to specific controller functions or callbacks.
- Koa Routing Middleware - Provides a comprehensive routing solution specifically tailored for Koa applications.
- Middleware Chains - Implements a sequential pipeline where request-response cycles pass through a series of middleware functions.
- Middleware Pipelines - Implements a middleware pipeline that allows a sequence of processing functions to execute before reaching the final request handler.
- Route Hierarchies - Allows the structuring of complex endpoints into logical hierarchies via nested router instances.
- Ordered Middleware Pipelines - Executes a strictly ordered sequence of middleware to process requests before reaching the final handler.
- Route Organization - Organizes web endpoints into modular collections and hierarchical structures using nested routers.
- URL Parameter Extraction - Extracts named segments from the URL path using regular expressions and adds them to the request context.
- Method-Based Handler Binding - Binds specific HTTP methods to handler functions to differentiate actions for the same URL path.
- Regex-Based Route Matching - Uses compiled regular expressions to match request URLs and extract parameters for handler identification.
- Named Route Lookups - Allows the generation of URLs from route identifiers to avoid hardcoding paths in the codebase.
- Route Naming Systems - Assigns unique identifiers to routes to facilitate dynamic URL generation and redirection.
- URL Generators - Provides utilities for programmatically constructing application URLs using route names and parameters.
Star history
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