webring/cmd/web/helpers.go

package main

import (
	"fmt"
	"net/http"
	"path"
	"runtime/debug"
	"strings"
)

func (app *application) serverError(w http.ResponseWriter, err error) {
    trace := fmt.Sprintf("%s\n%s", err.Error(), debug.Stack())
    app.errorLog.Print(trace)

    http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
}

func (app *application) clientError(w http.ResponseWriter, status int) {
    http.Error(w, http.StatusText(status), status)
}

func (app *application) notFound(w http.ResponseWriter) {
    app.clientError(w, http.StatusNotFound)
}

func (app *application) cleanUrl(url string) string {
    s, _ := strings.CutPrefix(url, "http://")
    s, _ = strings.CutPrefix(s, "https://")
    s = path.Base(path.Clean(s))
    s = "http://" + s
    return s
}