http://tour.golang.org/#57 A Tour of Go Exercise: HTTP Handlers Implement the following types and define ServeHTTP methods on them. Register them to handle specific paths in your web server. type String string type Struct struct { Greeting string Punct string Who string } For example, you should be able to register handlers using: http.Handle("/…

gistfile1.go

package main

import (
    "fmt"
    "net/http"
)

type String string

func (s String) ServeHTTP(
    w http.ResponseWriter,
    r *http.Request) {
    fmt.Fprint(w, s)
}

type Struct struct {
    Greeting string
    Punct    string
    Who      string
}

func (s Struct) ServeHTTP(
    w http.ResponseWriter,
    r *http.Request) {
    fmt.Fprint(w, s.Greeting, s.Punct, s.Who)
}

func main() {
    // your http.Handle calls here
    http.ListenAndServe("localhost:4000", nil)
    http.Handle("/string", String("I'm a frayed knot."))
    http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})
}

not works well, maybe fix with fixing order of main func lines.

func main() {
    // your http.Handle calls here
    http.Handle("/string", String("I'm a frayed knot."))
    http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})
    http.ListenAndServe("localhost:4000", nil)
}

It seems that, for this exercise, you can achieve the same result with:

func (s Struct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, s)
}

Just like the implementation on String

@aizatto for your solution to work, you need to change your main function to:

func main() {
// your http.Handle calls here
http.Handle("/string", String("I'm a frayed knot."))
http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})
http.ListenAndServe("localhost:4000", nil)
}

otherwise, trying to navigate to http://localhost:4000/string you will get a 'Not Found' error