ETag - Fiber

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ETag
ETag middleware for Fiber that lets caches be more efficient and save bandwidth, as a web server does not need to resend a full response if the content has not changed.
Table of Contents
​Signatures​
​Examples​
​Default Config​
​Custom Config​
​Config​
​Default Config​
Signatures
func New(config ...Config) fiber.Handler
Examples
Import the middleware package that is part of the Fiber web framework
import (
  "github.com/gofiber/fiber/v2"
  "github.com/gofiber/fiber/v2/middleware/etag"
)
After you initiate your Fiber app, you can use the following possibilities:
Default Config
app.Use(etag.New())
​
// Get / receives Etag: "13-1831710635" in response header
app.Get("/", func(c *fiber.Ctx) error {
    return c.SendString("Hello, World!")
})
Custom Config
app.Use(etag.New(etag.Config{
    Weak: true,
}))
​
// Get / receives Etag: "W/"13-1831710635" in response header
app.Get("/", func(c *fiber.Ctx) error {
    return c.SendString("Hello, World!")
})
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
​
    // Weak indicates that a weak validator is used. Weak etags are easy
    // to generate, but are far less useful for comparisons. Strong
    // validators are ideal for comparisons but can be very difficult
    // to generate efficiently. Weak ETag values of two representations
    // of the same resources might be semantically equivalent, but not
    // byte-for-byte identical. This means weak etags prevent caching
    // when byte range requests are used, but strong etags mean range
    // requests can still be cached.
    Weak bool
}
Default Config
var ConfigDefault = Config{
    Next: nil,
    Weak: false,
}
EnvVar
Expvar
Last modified 28d ago
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Table of Contents
Signatures
Examples
Default Config
Custom Config
Config
Default Config