# Martini — Classy Composable Web Framework for Go

> Martini is a Go web framework that uses reflection-based dependency injection and a modular middleware stack to provide an expressive, Sinatra-like API for building web applications and services.

## Install

Save as a script file and run:

# Martini — Classy Composable Web Framework for Go

## Quick Use
```bash
go get github.com/go-martini/martini
```
```go
package main

import "github.com/go-martini/martini"

func main() {
    m := martini.Classic()
    m.Get("/", func() string {
        return "Hello, world!"
    })
    m.Run()
}
```

## Introduction
Martini is a Go web framework that provides an expressive, Sinatra-like API for handling HTTP requests. It relies on reflection-based dependency injection to wire services into handlers automatically, letting developers write concise route handlers without manual plumbing.

## What Martini Does
- Maps HTTP routes to handler functions with automatic parameter injection
- Provides a composable middleware stack for request processing pipelines
- Includes a Classic() preset with logging, recovery, and static file serving
- Supports route groups for organizing related endpoints under shared prefixes
- Injects services into handlers automatically via a reflection-based injector

## Architecture Overview
Martini's core is an injector that resolves function parameters at runtime using Go's reflect package. When a request arrives, the router matches it to a handler, the middleware stack runs in sequence, and the injector supplies dependencies (request, response writer, custom services) to each handler. This design keeps handlers short but incurs a small reflection overhead per request.

## Self-Hosting & Configuration
- Requires Go 1.18 or later
- Install with `go get github.com/go-martini/martini`
- `martini.Classic()` bundles Logger, Recovery, and Static middleware
- Bind custom services with `m.Map()` or `m.MapTo()` for interface injection
- Set the `MARTINI_ENV` environment variable to `production` to disable debug output

## Key Features
- Sinatra-inspired routing with clean, expressive handler signatures
- Dependency injection removes boilerplate wiring of services
- Middleware is composable — add, remove, or reorder with a single call
- Route groups share middleware and path prefixes
- Minimal core with optional add-on packages for sessions, rendering, and auth

## Comparison with Similar Tools
- **Gin** — uses httprouter for speed and avoids reflection; Martini trades performance for expressiveness
- **Echo** — similar middleware model but without reflection-based DI
- **Negroni** — middleware-only library by the same author; Martini adds routing and DI on top
- **Revel** — full MVC framework; Martini is a lighter, library-style approach
- **Fiber** — fasthttp-based for throughput; Martini targets developer ergonomics

## FAQ
**Q: Is Martini still maintained?**
A: The repository is not archived but receives infrequent updates. It remains usable and stable for existing projects.

**Q: Does reflection hurt performance?**
A: There is a measurable overhead per request compared to non-reflective routers like httprouter, but for most workloads it is not the bottleneck.

**Q: Can I use Martini with Go modules?**
A: Yes. The `github.com/go-martini/martini` import path works with Go modules.

**Q: What is the relationship between Martini and Negroni?**
A: Both were created by the same developer. Negroni focuses solely on middleware composition, while Martini adds routing and dependency injection.

## Sources
- https://github.com/go-martini/martini
- https://github.com/go-martini/martini#readme

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Author: Script Depot