golang 获取get参数

package main

import (
"log"
"net/http"
)

func main() {
http.HandleFunc("/", handler)
http.ListenAndServe(":8081", nil)
}

func handler(w http.ResponseWriter, r *http.Request) {

keys, ok := r.URL.Query()["key"]

if !ok || len(keys) < 1 {
    log.Println("Url Param ‘key‘ is missing")
    return
}

// Query()["key"] will return an array of items,
// we only want the single item.
key := keys[0]

log.Println("Url Param ‘key‘ is: " + string(key))

}