转到Web服务器：在http：// localhost：8080 / handler上找不到任何内容

I am trying to learn web programming with Go. I stared out with a simple "hello world" web server:

package main

import "fmt"
import "net/http"

func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprint(w, "Hello, world")
}

func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

And when I go to

http://localhost:8080/handler    

in the browser, the browser can´t seem to find anything and nothing happens. What could be the reason for this?

You mapped your handler to the root ("/") of your server.

Call it like this in your browser

http://localhost:8080/

If you want to map a service to a specific name you can do this :

http.HandleFunc("/something", handler)

Then you would type this in your browser :

http://localhost:8080/something