$ show gofiber/fiber
This is the gofiber/fiber v3 repository, a high-performance, Express-inspired web framework written in Go. The framework provides a full-featured HTTP server with routing, middleware composition, request binding, session management, caching, logging, and an integrated HTTP client. It is built on top of the valyala/fasthttp library, emphasizing speed and low memory allocation. The architecture is library-based: users create an App instance, define routes and middleware, and start the server. The codebase is well-structured with extensive internal packages for common concerns (e.g., URL normalization, header parsing, template formatting). It includes over 30 built-in middleware packages, many of which are configurable and support pluggable storage backends. The code demonstrates strong engineering practices: extensive test coverage (including fuzz tests), object pooling, SIMD-style optimizations, and security-conscious design (SSRF protection, CSRF, redirect validation). Despite some internal complexity and duplication, it is a mature, actively maintained framework suitable for production use.
The LLM identified 4 files worth highlighting for reuse:
Provides a generic request data binding system that can deserialize HTTP request bodies (JSON, XML, Form, CBOR, MsgPack) and bind query parameters, headers, cookies, and URI parameters into arbitrary Go structs or maps. It supports custom binder registration and auto-detection based on Content-Type. The design is clean, extensible, and isolated from the core framework, making it reusable in other Go projects that need similar request parsing.
Implements a composable value extraction chain with provenance tracking. Extractors can pull values from headers, cookies, query parameters, form fields, or custom functions. Supports fallback logic, cycle detection, and introspection (Walk, Contains). This pattern is ideal for any middleware that needs to extract a value from multiple sources (e.g., authentication tokens). The package is self-contained with minimal dependencies.
An in-memory key-value store with configurable expiration, designed as a generic storage backend for middleware (e.g., rate limiting, caching). It uses a sync.Pool for internal metadata objects and provides efficient set, get, and delete operations. The implementation is isolated and could be extracted as a standalone library for applications needing a simple, expiring in-memory cache.
A full-featured HTTP client built on fasthttp, offering a fluent builder API for constructing requests (path parameters, headers, cookies, JSON/XML body marshaling). Supports hooks for request/response lifecycle, automatic cookie jar management (RFC 6265), retry via the retry addon, and file uploads. The client is designed with performance in mind (object pools, zero-copy streams) and could be reused as a standalone HTTP client.