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.

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⚠️ Attention

Fiber v3 is currently in beta and under active development. While it offers exciting new features, please note that it may not be stable for production use. We recommend sticking to the latest stable release (v2.x) for mission-critical applications. If you choose to use v3, be prepared for potential bugs and breaking changes. Always check the official documentation and release notes for updates and proceed with caution. Happy coding! 🚀

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⚙️ Installation

Fiber requires Go version 1.22 or higher to run. If you need to install or upgrade Go, visit the official Go download page. To start setting up your project. Create a new directory for your project and navigate into it. Then, initialize your project with Go modules by executing the following command in your terminal:

go mod init github.com/your/repo

To learn more about Go modules and how they work, you can check out the Using Go Modules blog post.

After setting up your project, you can install Fiber with the go get command:

go get -u github.com/gofiber/fiber/v3

This command fetches the Fiber package and adds it to your project's dependencies, allowing you to start building your web applications with Fiber.

⚡️ Quickstart

Getting started with Fiber is easy. Here's a basic example to create a simple web server that responds with "Hello, World 👋!" on the root path. This example demonstrates initializing a new Fiber app, setting up a route, and starting the server.

package main

import (
    "log"

    "github.com/gofiber/fiber/v3"
)

func main() {
    // Initialize a new Fiber app
    app := fiber.New()

    // Define a route for the GET method on the root path '/'
    app.Get("/", func(c fiber.Ctx) error {
        // Send a string response to the client
        return c.SendString("Hello, World 👋!")
    })

    // Start the server on port 3000
    log.Fatal(app.Listen(":3000"))
}

This simple server is easy to set up and run. It introduces the core concepts of Fiber: app initialization, route definition, and starting the server. Just run this Go program, and visit http://localhost:3000 in your browser to see the message.

Zero Allocation

Fiber is optimized for high-performance, meaning values returned from fiber.Ctx are not immutable by default and will be re-used across requests. As a rule of thumb, you must only use context values within the handler and must not keep any references. Once you return from the handler, any values obtained from the context will be re-used in future requests. Visit our documentation to learn more.

🤖 Benchmarks

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

🎯 Features

• Robust Routing
• Serve Static Files
• Extreme Performance
• Low Memory footprint
• API Endpoints
• Middleware & Next support
• Rapid server-side programming
• Template Engines
• WebSocket Support
• Socket.io Support
• Server-Sent Events
• Rate Limiter
• And much more, explore Fiber

💡 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.

⚠️ Limitations

• Due to Fiber's usage of unsafe, the library may not always be compatible with the latest Go version. Fiber v3 has been tested with Go versions 1.22 and 1.23.
• Fiber is not compatible with net/http interfaces. This means you will not be able to use projects like gqlgen, go-swagger, or any others which are part of the net/http ecosystem.

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

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

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

📖 Route Naming

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

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

    data, _ := json.MarshalIndent(app.GetRoute("api"), "", "  ")
    fmt.Print(string(data))
    // Prints:
    // {
    //    "method": "GET",
    //    "name": "api",
    //    "path": "/api/*",
    //    "params": [
    //      "*1"
    //    ]
    // }

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

📖 Serving Static Files

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

    app.Get("/*", static.New("./public"))
    // => http://localhost:3000/js/script.js
    // => http://localhost:3000/css/style.css

    app.Get("/prefix*", static.New("./public"))
    // => http://localhost:3000/prefix/js/script.js
    // => http://localhost:3000/prefix/css/style.css

    app.Get("*", static.New("./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/list
    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 (
    "log"

    "github.com/gofiber/fiber/v3"
    "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/v3"
    "github.com/gofiber/fiber/v3/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/v3"
    "github.com/gofiber/fiber/v3/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.Get("/", static.New("./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 (
    "log"

    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/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
}

Server-Sent Events

📖 More Info

import (
    "log"

    "github.com/gofiber/fiber/v3"
    "github.com/valyala/fasthttp"
)

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

  app.Get("/sse", func(c fiber.Ctx) error {
    c.Set("Content-Type", "text/event-stream")
    c.Set("Cache-Control", "no-cache")
    c.Set("Connection", "keep-alive")
    c.Set("Transfer-Encoding", "chunked")

    c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
      fmt.Println("WRITER")
      var i int

      for {
        i++
        msg := fmt.Sprintf("%d - the time is %v", i, time.Now())
        fmt.Fprintf(w, "data: Message: %s\n\n", msg)
        fmt.Println(msg)

        w.Flush()
        time.Sleep(5 * time.Second)
      }
    }))

    return nil
  })

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

Recover Middleware

📖 Recover

import (
    "log"

    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/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"))
}

Using Trusted Proxy

📖 Config

import (
    "log"

    "github.com/gofiber/fiber/v3"
)

func main() {
    app := fiber.New(fiber.Config{
        TrustProxy: true,
        TrustProxyConfig: fiber.TrustProxyConfig{
            Proxies: []string{"0.0.0.0", "1.1.1.1/30"}, // IP address or IP address range
        },
        ProxyHeader: fiber.HeaderXForwardedFor,
    })

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

🧬 Internal Middleware

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

Middleware	Description
adaptor	Converter for net/http handlers to/from Fiber request handlers.
basicauth	Provides HTTP basic authentication. It calls the next handler for valid credentials and 401 Unauthorized for missing or invalid credentials.
cache	Intercept and cache HTTP responses.
compress	Compression middleware for Fiber, with support for deflate, gzip, brotli and zstd.
cors	Enable cross-origin resource sharing (CORS) with various options.
csrf	Protect from CSRF exploits.
earlydata	Adds support for TLS 1.3's early data ("0-RTT") feature.
encryptcookie	Encrypt middleware which encrypts cookie values.
envvar	Expose environment variables with providing an optional config.
etag	Allows for caches to be more efficient and save bandwidth, as a web server does not need to resend a full response if the content has not changed.
expvar	Serves via its HTTP server runtime exposed variants in the JSON format.
favicon	Ignore favicon from logs or serve from memory if a file path is provided.
healthcheck	Liveness and Readiness probes for Fiber.
helmet	Helps secure your apps by setting various HTTP headers.
idempotency	Allows for fault-tolerant APIs where duplicate requests do not erroneously cause the same action performed multiple times on the server-side.
keyauth	Adds support for key based authentication.
limiter	Adds Rate-limiting support to Fiber. Use to limit repeated requests to public APIs and/or endpoints such as password reset.
logger	HTTP request/response logger.
pprof	Serves runtime profiling data in pprof format.
proxy	Allows you to proxy requests to multiple servers.
recover	Recovers from panics anywhere in the stack chain and handles the control to the centralized ErrorHandler.
redirect	Redirect middleware.
requestid	Adds a request ID to every request.
rewrite	Rewrites the URL path based on provided rules. It can be helpful for backward compatibility or just creating cleaner and more descriptive links.
session	Session middleware. NOTE: This middleware uses our Storage package.
skip	Skip middleware that skips a wrapped handler if a predicate is true.
static	Static middleware for Fiber that serves static files such as images, CSS, and JavaScript.
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
contrib	Third party middlewares
storage	Premade storage drivers that implement the Storage interface, designed to be used with various Fiber middlewares.
template	This package contains 9 template engines that can be used with Fiber v3 Go version 1.22 or higher is required.

🕶️ Awesome List

For more articles, middlewares, examples or tools check our awesome list.

👍 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 𝕏 (Twitter).
3. Write a review or tutorial on Medium, Dev.to or personal blog.
4. Support the project by donating a cup of coffee.

🖥️ Development

To ensure your contributions are ready for a Pull Request, please use the following Makefile commands. These tools help maintain code quality, consistency.

• make help: Display available commands.
• make audit: Conduct quality checks.
• make benchmark: Benchmark code performance.
• make coverage: Generate test coverage report.
• make format: Automatically format code.
• make lint: Run lint checks.
• make test: Execute all tests.
• make tidy: Tidy dependencies.

Run these commands to ensure your code adheres to project standards and best practices.

☕ 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
	@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

⭐️ Stargazers

🧾 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).