How do I add middleware with Fiber in Go?

In this guide, we will explore how to add middleware to a Fiber application in Go. Middleware in Fiber allows you to add functionality to your routes, such as logging, authentication, and request parsing, among others.

package main

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

// Middleware function to log requests
func logger(c *fiber.Ctx) error {
    // Log the request method and URL
    fmt.Printf("%s %s\n", c.Method(), c.Path())
    // Call the next handler in the chain
    return c.Next()
}

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

    // Use the logger middleware for all routes
    app.Use(logger)

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

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