fiber/middleware/cache

Cache Middleware

Cache middleware for Fiber designed to intercept responses and cache them. This middleware will cache the Body, Content-Type and StatusCode using the c.Path() (or a string returned by the Key function) as unique identifier. Special thanks to @codemicro for creating this middleware for Fiber core!

Table of Contents

• Cache Middleware
  • Table of Contents
  • Signatures
  • Examples
    • Default Config
    • Custom Config
    • Config
    • Default Config

Signatures

func New(config ...Config) fiber.Handler

Examples

First import the middleware from Fiber,

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

Then create a Fiber app with app := fiber.New().

Default Config

app.Use(cache.New())

Custom Config

app.Use(cache.New(cache.Config{
	Next: func(c *fiber.Ctx) bool {
		return c.Query("refresh") == "true"
	},
	Expiration: 30 * time.Minute,
	CacheControl: true,
}))

Config

// Config defines the config for middleware.
type Config struct {
	// Next defines a function to skip this middleware when returned true.
	//
	// Optional. Default: nil
	Next func(c *fiber.Ctx) bool

	// Expiration is the time that an cached response will live
	//
	// Optional. Default: 1 * time.Minute
	Expiration time.Duration

	// CacheHeader header on response header, indicate cache status, with the following possible return value
	//
	// hit, miss, unreachable
	//
	// Optional. Default: X-Cache
	CacheHeader string

	// CacheControl enables client side caching if set to true
	//
	// Optional. Default: false
	CacheControl bool

	// Key allows you to generate custom keys, by default c.Path() is used
	//
	// Default: func(c *fiber.Ctx) string {
	//   return c.Path()
	// }
	KeyGenerator func(*fiber.Ctx) string

	// Store is used to store the state of the middleware
	//
	// Default: an in memory store for this process only
	Storage fiber.Storage
}

Default Config

// ConfigDefault is the default config
var ConfigDefault = Config{
	Next:         nil,
	Expiration:   1 * time.Minute,
	CacheHeader:  "X-Cache",
	CacheControl: false,
	KeyGenerator: func(c *fiber.Ctx) string {
		return c.Path()
	},
	Storage:      nil,
}