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Fiber

Fiber is an Express inspired web framework built on top of Fasthttp, the fastest HTTP engine for Go. Designed to ease things up for fast development with zero memory allocation and performance in mind.

⚡️ Quickstart

package main

import "github.com/gofiber/fiber/v2"

func main() {
	app := fiber.New()

	app.Get("/", func(c *fiber.Ctx) error {
		return c.SendString("Hello, World 👋!")
	})

	app.Listen(":3000")
}

🤖 Benchmarks

These tests are performed by TechEmpower and Go Web. If you want to see all results, please visit our Wiki.

⚙️ Installation

First of all, download and install Go. 1.14 or higher is required.

Installation is done using the go get command:

go get github.com/gofiber/fiber/v2

🎯 Features

💡 Philosophy

New gophers that make the switch from Node.js to Go are dealing with a learning curve before they can start building their web applications or microservices. Fiber, as a web framework, was created with the idea of minimalism and follows the UNIX way, so that new gophers can quickly enter the world of Go with a warm and trusted welcome.

Fiber is inspired by Express, the most popular web framework on the Internet. We combined the ease of Express and raw performance of Go. If you have ever implemented a web application in Node.js (using Express or similar), then many methods and principles will seem very common to you.

We listen to our users in issues, Discord channel and all over the Internet to create a fast, flexible and friendly Go web framework for any task, deadline and developer skill! Just like Express does in the JavaScript world.

👀 Examples

Listed below are some of the common examples. If you want to see more code examples , please visit our Recipes repository or visit our hosted API documentation.

📖 Basic Routing

func main() {
	app := fiber.New()

	// GET /john
	app.Get("/:name", func(c *fiber.Ctx) error {
		msg := fmt.Sprintf("Hello, %s 👋!", c.Params("name"))
		return c.SendString(msg) // => Hello john 👋!
	})

	// GET /john/75
	app.Get("/:name/:age/:gender?", func(c *fiber.Ctx) error {
		msg := fmt.Sprintf("👴 %s is %s years old", c.Params("name"), c.Params("age"))
		return c.SendString(msg) // => 👴 john is 75 years old
	})

	// GET /dictionary.txt
	app.Get("/:file.:ext", func(c *fiber.Ctx) error {
		msg := fmt.Sprintf("📃 %s.%s", c.Params("file"), c.Params("ext"))
		return c.SendString(msg) // => 📃 dictionary.txt
	})

	// GET /flights/LAX-SFO
	app.Get("/flights/:from-:to", func(c *fiber.Ctx) error {
		msg := fmt.Sprintf("💸 From: %s, To: %s", c.Params("from"), c.Params("to"))
		return c.SendString(msg) // => 💸 From: LAX, To: SFO
	})

	// GET /api/register
	app.Get("/api/*", func(c *fiber.Ctx) error {
		msg := fmt.Sprintf("✋ %s", c.Params("*"))
		return c.SendString(msg) // => ✋ register
	})

	log.Fatal(app.Listen(":3000"))
}

📖 Serving Static Files

func main() {
	app := fiber.New()

	app.Static("/", "./public")
	// => http://localhost:3000/js/script.js
	// => http://localhost:3000/css/style.css

	app.Static("/prefix", "./public")
	// => http://localhost:3000/prefix/js/script.js
	// => http://localhost:3000/prefix/css/style.css

	app.Static("*", "./public/index.html")
	// => http://localhost:3000/any/path/shows/index/html

	log.Fatal(app.Listen(":3000"))
}

📖 Middleware & Next

func main() {
	app := fiber.New()

	// Match any route
	app.Use(func(c *fiber.Ctx) error {
		fmt.Println("🥇 First handler")
		return c.Next()
	})

	// Match all routes starting with /api
	app.Use("/api", func(c *fiber.Ctx) error {
		fmt.Println("🥈 Second handler")
		return c.Next()
	})

	// GET /api/register
	app.Get("/api/list", func(c *fiber.Ctx) error {
		fmt.Println("🥉 Last handler")
		return c.SendString("Hello, World 👋!")
	})

	log.Fatal(app.Listen(":3000"))
}
📚 Show more code examples

Views engines

📖 Config 📖 Engines 📖 Render

Fiber defaults to the html/template when no view engine is set.

If you want to execute partials or use a different engine like amber, handlebars, mustache or pug etc..

Checkout our Template package that support multiple view engines.

package main

import (
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/template/pug"
)

func main() {
	// You can setup Views engine before initiation app:
	app := fiber.New(fiber.Config{
		Views: pug.New("./views", ".pug"),
	})

	// And now, you can call template `./views/home.pug` like this:
	app.Get("/", func(c *fiber.Ctx) error {
		return c.Render("home", fiber.Map{
			"title": "Homepage",
			"year":  1999,
		})
	})

	log.Fatal(app.Listen(":3000"))
}

Grouping routes into chains

📖 Group

func middleware(c *fiber.Ctx) error {
	fmt.Println("Don't mind me!")
	return c.Next()
}

func handler(c *fiber.Ctx) error {
	return c.SendString(c.Path())
}

func main() {
	app := fiber.New()

	// Root API route
	api := app.Group("/api", middleware) // /api

	// API v1 routes
	v1 := api.Group("/v1", middleware) // /api/v1
	v1.Get("/list", handler)           // /api/v1/list
	v1.Get("/user", handler)           // /api/v1/user

	// API v2 routes
	v2 := api.Group("/v2", middleware) // /api/v2
	v2.Get("/list", handler)           // /api/v2/list
	v2.Get("/user", handler)           // /api/v2/user

	// ...
}

Middleware logger

📖 Logger

package main

import (
	"log"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/logger"
)

func main() {
	app := fiber.New()

	app.Use(logger.New())

	// ...

	log.Fatal(app.Listen(":3000"))
}

Cross-Origin Resource Sharing (CORS)

📖 CORS

import (
	"log"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
)

func main() {
	app := fiber.New()

	app.Use(cors.New())

	// ...

	log.Fatal(app.Listen(":3000"))
}

Check CORS by passing any domain in Origin header:

curl -H "Origin: http://example.com" --verbose http://localhost:3000

Custom 404 response

📖 HTTP Methods

func main() {
	app := fiber.New()

	app.Static("/", "./public")

	app.Get("/demo", func(c *fiber.Ctx) error {
		return c.SendString("This is a demo!")
	})

	app.Post("/register", func(c *fiber.Ctx) error {
		return c.SendString("Welcome!")
	})

	// Last middleware to match anything
	app.Use(func(c *fiber.Ctx) error {
		return c.SendStatus(404)
		// => 404 "Not Found"
	})

	log.Fatal(app.Listen(":3000"))
}

JSON Response

📖 JSON

type User struct {
	Name string `json:"name"`
	Age  int    `json:"age"`
}

func main() {
	app := fiber.New()

	app.Get("/user", func(c *fiber.Ctx) error {
		return c.JSON(&User{"John", 20})
		// => {"name":"John", "age":20}
	})

	app.Get("/json", func(c *fiber.Ctx) error {
		return c.JSON(fiber.Map{
			"success": true,
			"message": "Hi John!",
		})
		// => {"success":true, "message":"Hi John!"}
	})

	log.Fatal(app.Listen(":3000"))
}

WebSocket Upgrade

📖 Websocket

import (
    "github.com/gofiber/fiber/v2"
    "github.com/gofiber/fiber/v2/middleware/websocket"
)

func main() {
  app := fiber.New()

  app.Get("/ws", websocket.New(func(c *websocket.Conn) {
    for {
      mt, msg, err := c.ReadMessage()
      if err != nil {
        log.Println("read:", err)
        break
      }
      log.Printf("recv: %s", msg)
      err = c.WriteMessage(mt, msg)
      if err != nil {
        log.Println("write:", err)
        break
      }
    }
  }))

  log.Fatal(app.Listen(":3000"))
  // ws://localhost:3000/ws
}

Recover middleware

📖 Recover

import (
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/recover"
)

func main() {
	app := fiber.New()

	app.Use(recover.New())

	app.Get("/", func(c *fiber.Ctx) error {
		panic("normally this would crash your app")
	})

	log.Fatal(app.Listen(":3000"))
}

🧬 Internal Middleware

Here is a list of middleware that are included within the Fiber framework.

Middleware Description
basicauth Basic auth middleware provides an HTTP basic authentication. It calls the next handler for valid credentials and 401 Unauthorized for missing or invalid credentials.
compress Compression middleware for Fiber, it supports deflate, gzip and brotli by default.
cache Intercept and cache responses
cors Enable cross-origin resource sharing (CORS) with various options.
csrf Protect from CSRF exploits.
filesystem FileSystem middleware for Fiber, special thanks and credits to Alireza Salary
favicon Ignore favicon from logs or serve from memory if a file path is provided.
limiter Rate-limiting middleware for Fiber. Use to limit repeated requests to public APIs and/or endpoints such as password reset.
logger HTTP request/response logger.
pprof Special thanks to Matthew Lee (@mthli)
proxy Allows you to proxy requests to a multiple servers
requestid Adds a requestid to every request.
recover Recover middleware recovers from panics anywhere in the stack chain and handles the control to the centralized ErrorHandler.
timeout Adds a max time for a request and forwards to ErrorHandler if it is exceeded.

🧬 External Middleware

List of externally hosted middleware modules and maintained by the Fiber team.

Middleware Description
adaptor Converter for net/http handlers to/from Fiber request handlers, special thanks to @arsmn!
helmet Helps secure your apps by setting various HTTP headers.
jwt JWT returns a JSON Web Token (JWT) auth middleware.
keyauth Key auth middleware provides a key based authentication.
rewrite Rewrite middleware rewrites the URL path based on provided rules. It can be helpful for backward compatibility or just creating cleaner and more descriptive links.
session This session middleware is build on top of fasthttp/session by @savsgio MIT. Special thanks to @thomasvvugt for helping with this middleware.
template This package contains 8 template engines that can be used with Fiber v1.10.x Go version 1.13 or higher is required.
websocket Based on Fasthttp WebSocket for Fiber with Locals support!

🌱 Third Party Middlewares

This is a list of middlewares that are created by the Fiber community, please create a PR if you want to see yours!

👍 Contribute

If you want to say thank you and/or support the active development of Fiber:

  1. Add a GitHub Star to the project.
  2. Tweet about the project on your Twitter.
  3. Write a review or tutorial on Medium, Dev.to or personal blog.
  4. Support the project by donating a cup of coffee.

Supporters

Fiber is an open source project that runs on donations to pay the bills e.g. our domain name, gitbook, netlify and serverless hosting. If you want to support Fiber, you can buy a coffee here.

User Donation
@destari x 10
@dembygenesis x 5
@thomasvvugt x 5
@hendratommy x 5
@ekaputra07 x 5
@jorgefuertes x 5
@candidosales x 5
@l0nax x 3
@ankush x 3
@bihe x 3
@justdave x 3
@koddr x 1
@lapolinar x 1
@diegowifi x 1
@ssimk0 x 1
@raymayemir x 1
@melkorm x 1
@marvinjwendt x 1
@toishy x 1

‎‍💻 Code Contributors

Code Contributors

⭐️ Stargazers

Stargazers over time

⚠️ License

Copyright (c) 2019-present Fenny and Contributors. Fiber is free and open-source software licensed under the MIT License. Official logo was created by Vic Shóstak and distributed under Creative Commons license (CC BY-SA 4.0 International).

Third-party library licenses

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