Fiber (webserver)

Setting up the preconfigured webserver:

app := fiber.New(...)

// register your routes here

fiber.UseFiber(...) // starts the webserver

It will integrate logging, metrics and basic error handling into your webserver app.

Error handling

app.Get("/path", func(ctx *fiber.Ctx) error {
	// whenever you return a `fiber.Error`:
	// - the status code will be set automatically
	// - the error will be logged
	// - and the error string wil be returned in the response body
	return fiber.NewFiberError(errors.New("your error"), fiber.StatusBadRequest)
})

Middleware usage

If you want to add middleware to your fiber app, you can do this like in the following:

func newMiddlewareMap() *MiddlewareHandlerMap {
	return &MiddlewareHandlerMap{
		// fiber supports middleware restriction to paths. Use an empty string for global middleware.
		// all middleware will be initialized in the same order that it is defined.
		"/path": []fiber.Handler{
			func(ctx *fiber.Ctx) error {
				// your middleware code here
				return ctx.Next()
			},
		},
	}
}

Predefined middleware

• middleware.NoCors() middleware that disables CORS for development environments

Used environment variables

variable name	default	use
HTTP_REQUEST_BODY_LIMIT	4	body size limit for all http requests
CORS_ALLOW_ORIGINS		list of allowed origins, example: https://becklyn.com, https://www.becklyn.com
CORS_ALLOW_HEADERS		list of allowed headers, example: Content-Type, Accept
CORS_EXPOSE_HEADERS		list of exposable headers, example: Content-Type, Accept
CORS_ALLOW_CREDENTIALS		bool that specifies if credentials are allowed