Adaptor

The adaptor package converts between Fiber and net/http, letting you reuse handlers, middleware, and requests across both frameworks.

Features

• Convert net/http handlers and middleware to Fiber handlers
• Convert Fiber handlers to net/http handlers
• Convert a Fiber context (fiber.Ctx) into an http.Request

API Reference

Name	Signature	Description
HTTPHandler	HTTPHandler(h http.Handler) fiber.Handler	Converts http.Handler to fiber.Handler
HTTPHandlerFunc	HTTPHandlerFunc(h http.HandlerFunc) fiber.Handler	Converts http.HandlerFunc to fiber.Handler
HTTPMiddleware	HTTPMiddleware(mw func(http.Handler) http.Handler) fiber.Handler	Converts http.Handler middleware to fiber.Handler middleware
FiberHandler	FiberHandler(h fiber.Handler) http.Handler	Converts fiber.Handler to http.Handler
FiberHandlerFunc	FiberHandlerFunc(h fiber.Handler) http.HandlerFunc	Converts fiber.Handler to http.HandlerFunc
FiberApp	FiberApp(app *fiber.App) http.HandlerFunc	Converts an entire Fiber app to a http.HandlerFunc
ConvertRequest	ConvertRequest(c fiber.Ctx, forServer bool) (*http.Request, error)	Converts fiber.Ctx into a http.Request
CopyContextToFiberContext	CopyContextToFiberContext(context any, requestContext *fasthttp.RequestCtx)	Copies context.Context to fasthttp.RequestCtx

---

Usage Examples

1. Using net/http handlers in Fiber

This example shows how to run a standard net/http handler within a Fiber app:

package main

import (
    "fmt"
    "net/http"
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/adaptor"
)

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

    // Convert an http.Handler to a Fiber handler
    app.Get("/", adaptor.HTTPHandler(http.HandlerFunc(helloHandler)))

    app.Listen(":3000")
}

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, "Hello from net/http!")
}

2. Using net/http middleware with Fiber

Middleware written for net/http can run inside Fiber:

package main

import (
    "log"
    "net/http"
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/adaptor"
)

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

    // Apply an http middleware in Fiber
    app.Use(adaptor.HTTPMiddleware(loggingMiddleware))

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

    app.Listen(":3000")
}

func loggingMiddleware(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        log.Println("Request received")
        next.ServeHTTP(w, r)
    })
}

3. Using Fiber handlers in net/http

You can use Fiber handlers from net/http:

package main

import (
    "net/http"
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/adaptor"
)

func main() {
    // Convert a Fiber handler to an http.Handler
    http.Handle("/", adaptor.FiberHandler(helloFiber))
    
    // Convert a Fiber handler to an http.HandlerFunc
    http.HandleFunc("/func", adaptor.FiberHandlerFunc(helloFiber))
    
    http.ListenAndServe(":3000", nil)
}

func helloFiber(c fiber.Ctx) error {
    return c.SendString("Hello from Fiber!")
}

4. Running a Fiber app in net/http

You can wrap a full Fiber app inside net/http:

package main

import (
    "net/http"
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/adaptor"
)

func main() {
    app := fiber.New()
    app.Get("/", func(c fiber.Ctx) error {
        return c.SendString("Hello from Fiber!")
    })

    // Run Fiber inside an http server
    http.ListenAndServe(":3000", adaptor.FiberApp(app))
}

5. Converting a Fiber context (fiber.Ctx) to http.Request

To access an http.Request within a Fiber handler:

package main

import (
    "net/http"
    "github.com/gofiber/fiber/v3"
    "github.com/gofiber/fiber/v3/middleware/adaptor"
)

func main() {
    app := fiber.New()
    app.Get("/request", handleRequest)
    app.Listen(":3000")
}

func handleRequest(c fiber.Ctx) error {
    httpReq, err := adaptor.ConvertRequest(c, false)
    if err != nil {
        return err
    }
    return c.SendString("Converted Request URL: " + httpReq.URL.String())
}

---

Summary

The adaptor package lets Fiber and net/http interoperate so you can:

• Convert handlers and middleware in both directions
• Run Fiber apps inside net/http
• Convert fiber.Ctx to http.Request

This makes it straightforward to integrate Fiber with existing Go projects or migrate between frameworks.