Fiber is an Express inspired web framework build 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"
func main() {
app := fiber.New()
app.Get("/", func(c *fiber.Ctx) {
c.Send("Hello, World!")
})
app.Listen(3000)
}
⚙️ Installation
First of all, download and install Go. 1.11 or higher is required.
Installation is done using the go get command:
go get github.com/gofiber/fiber
🤖 Benchmarks
These tests are performed by TechEmpower and Go Web. If you want to see all 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
- Available in 9 other languages
- 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 follow 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 on Node.js (using Express or similar), then many methods and principles will seem very common to you.
We listen to our users in issues (and all over the Internet) to create a fast, flexible and friendly Go web framework for any tasks, deadlines and developer skills! 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 API documentation.
Routing
func main() {
app := fiber.New()
// GET /john
app.Get("/:name", func(c *fiber.Ctx) {
fmt.Printf("Hello %s!", c.Params("name"))
// => Hello john!
})
// GET /john
app.Get("/:name/:age?", func(c *fiber.Ctx) {
fmt.Printf("Name: %s, Age: %s", c.Params("name"), c.Params("age"))
// => Name: john, Age:
})
// GET /api/register
app.Get("/api*", func(c *fiber.Ctx) {
fmt.Printf("/api%s", c.Params("*"))
// => /api/register
})
app.Listen(3000)
}
Serve 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
app.Listen(3000)
}
Middleware & Next
func main() {
app := fiber.New()
// Match any route
app.Use(func(c *fiber.Ctx) {
fmt.Println("First middleware")
c.Next()
})
// Match all routes starting with /api
app.Use("/api", func(c *fiber.Ctx) {
fmt.Println("Second middleware")
c.Next()
})
// POST /api/register
app.Post("/api/register", func(c *fiber.Ctx) {
fmt.Println("Last middleware")
c.Send("Hello, World!")
})
app.Listen(3000)
}
📚 Show more code examples
Template engines
Already supports:
func main() {
// You can setup template engine before initiation app:
app := fiber.New(&fiber.Settings{
ViewEngine: "mustache",
ViewFolder: "./views",
ViewExtension: ".tmpl",
})
// OR after initiation app at any convenient location:
app.Settings.ViewEngine = "mustache"
app.Settings.ViewFolder = "./views"
app.Settings.ViewExtension = ".tmpl"
// And now, you can call template `./views/home.tmpl` like this:
app.Get("/", func(c *fiber.Ctx) {
c.Render("home", fiber.Map{
"title": "Homepage",
"year": 1999,
})
})
// ...
}
Grouping routes into chains
func main() {
app := fiber.New()
// Root API route
api := app.Group("/api", cors()) // /api
// API v1 routes
v1 := api.Group("/v1", mysql()) // /api/v1
v1.Get("/list", handler) // /api/v1/list
v1.Get("/user", handler) // /api/v1/user
// API v2 routes
v2 := api.Group("/v2", mongodb()) // /api/v2
v2.Get("/list", handler) // /api/v2/list
v2.Get("/user", handler) // /api/v2/user
// ...
}
Custom 404 response
func main() {
app := fiber.New()
app.Static("/public")
app.Get("/demo", func(c *fiber.Ctx) {
c.Send("This is a demo!")
})
app.Post("/register", func(c *fiber.Ctx) {
c.Send("Welcome!")
})
// Last middleware to match anything
app.Use(func(c *fiber.Ctx) {
c.SendStatus(404) // => 404 "Not Found"
})
app.Listen(3000)
}
JSON Response
func main() {
app := fiber.New()
type User struct {
Name string `json:"name"`
Age int `json:"age"`
}
// Serialize JSON
app.Get("/json", func(c *fiber.Ctx) {
c.JSON(&User{"John", 20})
// => {"name":"John", "age":20}
})
app.Listen(3000)
}
WebSocket support
func main() {
app := fiber.New()
app.WebSocket("/ws/:name", func(c *fiber.Conn) {
log.Println(c.Params("name"))
for {
mt, msg, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
break
}
log.Printf("recovery: %s", msg)
err = c.WriteMessage(mt, msg)
if err != nil {
log.Println("write:", err)
break
}
}
})
// Listen on ws://localhost:3000/ws/john
app.Listen(3000)
}
Recover from panic
func main() {
app := fiber.New()
app.Get("/", func(c *fiber.Ctx) {
panic("Something went wrong!")
})
app.Recover(func(c *fiber.Ctx) {
c.Status(500).Send(c.Error())
// => 500 "Something went wrong!"
})
app.Listen(3000)
}
💬 Media
- Welcome to Fiber — an Express.js styled web framework written in Go with ❤️ (by Vic Shóstak, 03 Feb 2020)
- Fiber official release is out now! 🎉 What's new and is he still fast, flexible and friendly? (by Vic Shóstak, 21 Feb 2020)
👍 Contribute
If you want to say thank you and/or support the active development of Fiber:
- Add a GitHub Star to the project.
- Tweet about the project on your Twitter.
- Write a review or tutorial on Medium, Dev.to or personal blog.
- Help us to translate this
READMEto another language.
☕ Supporters
 HenrikBinggl |
 Vic Shóstak |
 MarvinJWendt |
 ToishY |
⭐️ Stars
⚠️ License
Fiber is free and open-source software licensed under the MIT License.