golang中判断请求是http还是https获取当前访问地址

package main
import (
    "fmt"
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    if r.TLS != nil {
        fmt.Println("HTTPS request")
    } else {
        fmt.Println("HTTP request")
    }
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

location / {
    proxy_pass http://your_upstream_server;
    proxy_set_header X-Forwarded-Proto $scheme;
}

package main
import (
    "fmt"
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    proto := r.Header.Get("X-Forwarded-Proto")
    if proto == "https" {
        fmt.Println("HTTPS request")
    } else {
        fmt.Println("HTTP request")
    }
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

//获取当前访问的Host
func GetHost(r *http.Request) (Url string) {
    scheme := "http://"
    if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
        scheme = "https://"
    }
    return strings.Join([]string{scheme, r.Host}, "")
}