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More items
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.
Tool Sponsors - supporting Fiber with free IDE licenses and AI credits
⚙️ Installation
Fiber requires Go version 1.25 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 reused 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 reused in future requests. Visit our documentation to learn more.
🤖 Benchmarks
These tests are performed by TechEmpower. 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 version 1.25 or higher.
* Fiber automatically adapts common net/http handler shapes when you register them on the router, and you can still use the adaptor middleware when you need to bridge entire apps or net/http middleware.
net/http compatibility
Fiber can run side by side with the standard library. The router accepts existing net/http handlers directly and even works with native fasthttp.RequestHandler callbacks, so you can plug in legacy endpoints without wrapping them manually:
package main
import (
"log"
"net/http"
"github.com/gofiber/fiber/v3"
)
func main() {
httpHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if _, err := w.Write([]byte("served by net/http")); err != nil {
panic(err)
}
})
app := fiber.New()
app.Get("/", httpHandler)
// Start the server on port 3000
log.Fatal(app.Listen(":3000"))
}
When you need to convert entire applications or reuse net/http middleware chains, rely on the adaptor middleware. It converts handlers and middlewares in both directions and even lets you mount a Fiber app in a net/http server.
Express-style handlers
Fiber also adapts Express-style callbacks that operate on the lightweight fiber.Req and fiber.Res helper interfaces. This lets you port middleware and route handlers from Express-inspired codebases while keeping Fiber's router features:
// Request/response handlers (2-argument)
app.Get("/", func(req fiber.Req, res fiber.Res) error {
return res.SendString("Hello from Express-style handlers!")
})
// Middleware with an error-returning next callback (3-argument)
app.Use(func(req fiber.Req, res fiber.Res, next func() error) error {
if req.IP() == "192.168.1.254" {
return res.SendStatus(fiber.StatusForbidden)
}
return next()
})
// Middleware with a no-arg next callback (3-argument)
app.Use(func(req fiber.Req, res fiber.Res, next func()) {
if req.Get("X-Skip") == "true" {
return // stop the chain without calling next
}
next()
})
Note: Adapted net/http handlers continue to operate with the standard-library semantics. They don't get access to fiber.Ctx features and incur the overhead of the compatibility layer, so native fiber.Handler callbacks still provide the best performance.
👀 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
package main
import (
"fmt"
"log"
"github.com/gofiber/fiber/v3"
)
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
package main
import (
"encoding/json"
"fmt"
"log"
"github.com/gofiber/fiber/v3"
)
func main() {
app := fiber.New()
app.Get("/api/*", func(c fiber.Ctx) error {
msg := fmt.Sprintf("✋ %s", c.Params("*"))
return c.SendString(msg) // => ✋ register
}).Name("api")
route := app.GetRoute("api")
data, _ := json.MarshalIndent(route, "", " ")
fmt.Println(string(data))
// Prints:
// {
// "method": "GET",
// "name": "api",
// "path": "/api/*",
// "params": [
// "*1"
// ]
// }
log.Fatal(app.Listen(":3000"))
}
📖 Serving Static Files
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/fiber/v3/middleware/static"
)
func main() {
app := fiber.New()
// Serve static files from the "./public" directory
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
// Serve a single file for any unmatched routes
app.Get("*", static.New("./public/index.html"))
// => http://localhost:3000/any/path/shows/index.html
log.Fatal(app.Listen(":3000"))
}
📖 Middleware & Next
package main
import (
"fmt"
"log"
"github.com/gofiber/fiber/v3"
)
func main() {
app := fiber.New()
// Middleware that matches any route
app.Use(func(c fiber.Ctx) error {
fmt.Println("🥇 First handler")
return c.Next()
})
// Middleware that matches 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., check out our Template package that supports multiple view engines.
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/template/pug"
)
func main() {
// Initialize a new Fiber app with Pug template engine
app := fiber.New(fiber.Config{
Views: pug.New("./views", ".pug"),
})
// Define a route that renders the "home.pug" template
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
package main
import (
"log"
"github.com/gofiber/fiber/v3"
)
func middleware(c fiber.Ctx) error {
log.Println("Middleware executed")
return c.Next()
}
func handler(c fiber.Ctx) error {
return c.SendString("Handler response")
}
func main() {
app := fiber.New()
// Root API group with middleware
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
log.Fatal(app.Listen(":3000"))
}
Middleware Logger
📖 Logger
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/fiber/v3/middleware/logger"
)
func main() {
app := fiber.New()
// Use Logger middleware
app.Use(logger.New())
// Define routes
app.Get("/", func(c fiber.Ctx) error {
return c.SendString("Hello, Logger!")
})
log.Fatal(app.Listen(":3000"))
}
Cross-Origin Resource Sharing (CORS)
📖 CORS
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/fiber/v3/middleware/cors"
)
func main() {
app := fiber.New()
// Use CORS middleware with default settings
app.Use(cors.New())
// Define routes
app.Get("/", func(c fiber.Ctx) error {
return c.SendString("CORS enabled!")
})
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
package main
import (
"log"
"github.com/gofiber/fiber/v3"
)
func main() {
app := fiber.New()
// Define routes
app.Get("/", static.New("./public"))
app.Get("/demo", func(c fiber.Ctx) error {
return c.SendString("This is a demo page!")
})
app.Post("/register", func(c fiber.Ctx) error {
return c.SendString("Registration successful!")
})
// Middleware to handle 404 Not Found
app.Use(func(c fiber.Ctx) error {
return c.SendStatus(fiber.StatusNotFound) // => 404 "Not Found"
})
log.Fatal(app.Listen(":3000"))
}
JSON Response
📖 JSON
package main
import (
"log"
"github.com/gofiber/fiber/v3"
)
type User struct {
Name string `json:"name"`
Age int `json:"age"`
}
func main() {
app := fiber.New()
// Route that returns a JSON object
app.Get("/user", func(c fiber.Ctx) error {
return c.JSON(&User{"John", 20})
// => {"name":"John", "age":20}
})
// Route that returns a JSON map
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
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/fiber/v3/middleware/websocket"
)
func main() {
app := fiber.New()
// WebSocket route
app.Get("/ws", websocket.New(func(c *websocket.Conn) {
defer c.Close()
for {
// Read message from client
mt, msg, err := c.ReadMessage()
if err != nil {
log.Println("read:", err)
break
}
log.Printf("recv: %s", msg)
// Write message back to client
err = c.WriteMessage(mt, msg)
if err != nil {
log.Println("write:", err)
break
}
}
}))
log.Fatal(app.Listen(":3000"))
// Connect via WebSocket at ws://localhost:3000/ws
}
Server-Sent Events
📖 More Info
package main
import (
"bufio"
"fmt"
"log"
"time"
"github.com/gofiber/fiber/v3"
"github.com/valyala/fasthttp"
)
func main() {
app := fiber.New()
// Server-Sent Events route
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(func(w *bufio.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
package main
import (
"log"
"github.com/gofiber/fiber/v3"
"github.com/gofiber/fiber/v3/middleware/recover"
)
func main() {
app := fiber.New()
// Use Recover middleware to handle panics gracefully
app.Use(recover.New())
// Route that intentionally panics
app.Get("/", func(c fiber.Ctx) error {
panic("normally this would crash your app")
})
log.Fatal(app.Listen(":3000"))
}
Using Trusted Proxy
📖 Config
package main
import (
"log"
"github.com/gofiber/fiber/v3"
)
func main() {
app := fiber.New(fiber.Config{
// Configure trusted proxies - WARNING: Only trust proxies you control
// Using TrustProxy: true with unrestricted IPs can lead to IP spoofing
TrustProxy: true,
TrustProxyConfig: fiber.TrustProxyConfig{
Proxies: []string{"10.0.0.0/8", "172.16.0.0/12"}, // Example: Internal network ranges only
},
ProxyHeader: fiber.HeaderXForwardedFor,
})
// Define routes
app.Get("/", func(c fiber.Ctx) error {
return c.SendString("Trusted Proxy Configured!")
})
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 variables 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.
hostauthorization Validates the Host header against a configurable allowlist, protecting against DNS rebinding attacks.
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.
paginate Extracts pagination parameters from query strings. Supports page-based, offset-based, and cursor-based pagination with multi-field sorting.
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.
responsetime Measures request handling duration and writes it to a configurable response header.
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.
🕶️ 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 your personal blog.
4. Support the project by becoming a GitHub Sponsor.
💻 Development
To ensure your contributions are ready for a Pull Request, please use the following Makefile commands. These tools help maintain code quality and 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, please sponsor the organization via ⭐ GitHub Sponsors.
📅 Monthly Sponsors
🔥 Fiber Guardian
☕ Fiber Supporter
🪴 Fiber Friend
🎁 One-time Sponsors
🚀 Fiber Hero
🪴 Fiber Friend
💻 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).
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⚡️ Express inspired web framework written in Go
gofiber.io
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expressexpressjsfastfiberflexibleframeworkfriendlygogolanghacktoberfesthacktoberfest2020nodejsperformancerest-apiweb
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