如何在 golang 中使用正则表达式获取 url 模式？

http.HandleFunc()HandleFunc()/favico.ico/images/ServeMux

/

例如：

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

var rNum = regexp.MustCompile(`\d`)  // Has digit(s)
var rAbc = regexp.MustCompile(`abc`) // Contains "abc"

func route(w http.ResponseWriter, r *http.Request) {
    switch {
    case rNum.MatchString(r.URL.Path):
        digits(w, r)
    case rAbc.MatchString(r.URL.Path):
        abc(w, r)
    default:
        w.Write([]byte("Unknown Pattern"))
    }
}

func digits(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("Has digits"))
}

func abc(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("Has abc"))
}

或者使用像 Gorilla MUX 这样的外部库。