adapter.go — fiber Source File

Source Code

package fiber

import (
	"fmt"
	"net/http"
	"reflect"

	"github.com/valyala/fasthttp"
	"github.com/valyala/fasthttp/fasthttpadaptor"
)

// toFiberHandler converts a supported handler type to a Fiber handler.
func toFiberHandler(handler any) (Handler, bool) {
	if handler == nil {
		return nil, false
	}

	switch handler.(type) {
	case Handler, func(Ctx): // (1)-(2) Fiber handlers
		return adaptFiberHandler(handler)
	case func(Req, Res) error, func(Req, Res), func(Req, Res, func() error) error, func(Req, Res, func() error), func(Req, Res, func()) error, func(Req, Res, func()), func(Req, Res, func(error)), func(Req, Res, func(error)) error, func(Req, Res, func(error) error), func(Req, Res, func(error) error) error: // (3)-(12) Express-style request handlers
		return adaptExpressHandler(handler)
	case http.HandlerFunc, http.Handler, func(http.ResponseWriter, *http.Request): // (13)-(15) net/http handlers
		return adaptHTTPHandler(handler)
	case fasthttp.RequestHandler, func(*fasthttp.RequestCtx) error: // (16)-(17) fasthttp handlers
		return adaptFastHTTPHandler(handler)
	default: // (18) unsupported handler type
		return nil, false
	}
}

func adaptFiberHandler(handler any) (Handler, bool) {
	switch h := handler.(type) {
	case Handler: // (1) direct Fiber handler
		if h == nil {
			return nil, false
		}
		return h, true
	case func(Ctx): // (2) Fiber handler without error return
		if h == nil {
			return nil, false
		}
		return func(c Ctx) error {
			h(c)
			return nil
		}, true
	default:
		return nil, false
	}
}

func adaptExpressHandler(handler any) (Handler, bool) {
	switch h := handler.(type) {
	case func(Req, Res) error: // (3) Express-style handler with error return
		if h == nil {
			return nil, false
		}
		return func(c Ctx) error {
			return h(c.Req(), c.Res())
		}, true
// ... (216 more lines)