Middleware guides

Middleware - CORS

Detailed guide to Kern CORS middleware, including basic and advanced CORS configuration for browser-based APIs.

Kern.CORS and Kern.CORSWithConfig

Use CORS middleware when browser clients call your API from another origin.

Signatures

func CORS(origins []string) MiddlewareFunc
func CORSWithConfig(config CORSConfig) MiddlewareFunc

Basic example

app.Use(kern.CORS([]string{"https://app.example.com"}))

Advanced example

app.Use(kern.CORSWithConfig(kern.CORSConfig{
    AllowOrigins:     []string{"https://app.example.com"},
    AllowMethods:     []string{"GET", "POST", "PUT", "DELETE"},
    AllowHeaders:     []string{"Content-Type", "Authorization"},
    ExposeHeaders:    []string{"X-Request-ID"},
    AllowCredentials: true,
    MaxAge:           86400,
}))

Middleware - Recovery

Detailed guide to Kern.Recovery middleware for panic-safe request handling in production Go services.

Middleware - BearerAuth

Detailed guide to Kern Bearer token authentication middleware with default and configurable validation paths.

On this page

Kern.CORS and Kern.CORSWithConfig Signatures Basic example Advanced example