My solution to "Exercise better errors" from Section 03 of Francesc Campoy's Go Web Workshop

go-web-workshop_s03-e3.go

// https://github.com/campoy/go-web-workshop/blob/master/section03/README.md

package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"strings"

	"github.com/gorilla/mux"
)

// type errorReader struct{}

// func (e errorReader) Read(p []byte) (n int, err error) {
// 	return 0, errors.New("test error")
// }

func bodyHandler(w http.ResponseWriter, r *http.Request) {
	// b, err := ioutil.ReadAll(&errorReader{})
	b, err := ioutil.ReadAll(r.Body)

	if err != nil {
		w.WriteHeader(http.StatusInternalServerError)
		fmt.Fprintln(w, "Internal Server Error")
		return
	}
	name := strings.TrimSpace(string(b))
	if name == "" {
		w.WriteHeader(http.StatusBadRequest)
		fmt.Fprintln(w, "Bad Request")
		return
	}
	fmt.Fprintf(w, "Hello, %s!", name)
}

func main() {
	r := mux.NewRouter()
	r.HandleFunc("/hello", bodyHandler)
	http.Handle("/", r)
	if err := http.ListenAndServe("127.0.0.1:8080", nil); err != nil {
		log.Fatal(err)
	}
}