# Echo — High Performance Minimalist Go Web Framework

> Echo is a high performance, minimalist Go web framework. Clean API, automatic TLS, HTTP/2, data binding, middleware, and group routing. A strong alternative to Gin with excellent documentation and built-in features.

## Install

Save in your project root:

## Quick Use

```bash
mkdir my-api && cd my-api
go mod init my-api
go get github.com/labstack/echo/v4
```

```go
package main

import (
    "net/http"
    "github.com/labstack/echo/v4"
    "github.com/labstack/echo/v4/middleware"
)

func main() {
    e := echo.New()
    e.Use(middleware.Logger())
    e.Use(middleware.Recover())
    e.Use(middleware.CORS())

    e.GET("/api/hello", func(c echo.Context) error {
        return c.JSON(http.StatusOK, map[string]string{"message": "Hello from Echo"})
    })

    e.Logger.Fatal(e.Start(":8080"))
}
```

## Intro

Echo is a high performance, minimalist Go web framework with a clean and expressive API. Features automatic TLS via Let"s Encrypt, HTTP/2 support, extensible middleware, data binding and validation, and central error handling.

- **Repo**: https://github.com/labstack/echo
- **Stars**: 32K+
- **Language**: Go
- **License**: MIT

## What Echo Does

- **Optimized router** — radix tree, zero dynamic allocations
- **Middleware** — Logger, Recover, CORS, JWT, BasicAuth, Rate Limiter, Gzip
- **Data binding** — JSON, XML, form, query to structs
- **Validation** — struct tag validation
- **Templates** — any Go template engine
- **Auto TLS** — Let"s Encrypt integration
- **HTTP/2** — native support
- **WebSocket** — via gorilla/websocket
- **Group routing** — shared prefix and middleware

## Architecture

Radix tree router with zero allocation path matching. Context carries request/response and is reused via sync.Pool. Middleware chain executes via `next()`. Implements `http.Handler` for stdlib compatibility.

## Comparison

| Framework | Router | Key Strength |
|---|---|---|
| Echo | Radix tree | Best docs, auto TLS |
| Gin | httprouter | Largest community |
| Fiber | Fasthttp | Fastest raw speed |
| Chi | stdlib | Full stdlib compat |

## 常见问题 FAQ

**Q: Echo vs Gin？**
A: 功能非常接近。Echo 文档更好、内置 auto TLS；Gin 社区更大、star 更多。两者性能几乎一样。

## 来源与致谢 Sources

- Docs: https://echo.labstack.com
- GitHub: https://github.com/labstack/echo
- License: MIT

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Author: AI Open Source