App Handler

Use custom handler type in your application

net/http

valyala/fasthttp

package main

import (
    "errors"
    "fmt"
    "log"
    "net/http"

    "github.com/vardius/gorouter/v4"
)

type AppHandlerFunc func(http.ResponseWriter, *http.Request) error

// ServeHTTP calls f(w, r) and handles error
func (f AppHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    if err := f(w, r); err != nil {
        w.WriteHeader(http.StatusInternalServerError)
        _, _ = fmt.Fprint(w, err.Error())
    }
}

func Index(w http.ResponseWriter, r *http.Request) error {
    return errors.New("I am app handler which can return error")
}

func main() {
    router := gorouter.New()
    router.GET("/", AppHandlerFunc(Index))

    log.Fatal(http.ListenAndServe(":8080", router))
}

package main

import (
    "errors"
    "log"

    "github.com/valyala/fasthttp"
    "github.com/vardius/gorouter/v4"
)

type AppHandlerFunc func(ctx *fasthttp.RequestCtx) error

// HandleFastHTTP calls f(ctx) and handles error
func (f AppHandlerFunc) HandleFastHTTP(ctx *fasthttp.RequestCtx) {
    if err := f(ctx); err != nil {
        ctx.SetBody([]byte(err.Error()))
        ctx.SetStatusCode(fasthttp.StatusInternalServerError)
    }
}

func index(_ *fasthttp.RequestCtx) error {
    return errors.New("I am app handler which can return error")
}

func main() {
    router := gorouter.NewFastHTTPRouter()
    router.GET("/", AppHandlerFunc(index))

    log.Fatal(fasthttp.ListenAndServe(":8080", router.HandleFastHTTP))
}