实例

import (
   "fmt"
   "net/http"
   "strings"
)

func myHandler(w http.ResponseWriter, r *http.Request) {
   //解析参数,默认是不会解析的
   r.ParseForm()
   fmt.Fprintf(w, "%v\n", r.Form)
   fmt.Fprintf(w, "path:%s\n", r.URL.Path)
   fmt.Fprintf(w, "schema:%s\n", r.URL.Scheme)
   //get查询字符串
   fmt.Fprintf(w, "form:%s\n", r.Form)
   //控制台打印
   for k, v := range r.Form {
      fmt.Println("key: ", k)
      fmt.Println("value: ", strings.Join(v, ""))
   }

   fmt.Fprintf(w, "hello world\n")
}

func main() {
   //第一个参数是url的
   http.HandleFunc("/health", myHandler)

   //用于指定的tcp网络地址监听
   //第一个参数是监听地址,第二个参数是服务端处理程序,通常为空,为空表示服务端调用http.DefaultServeMux处理
   err := http.ListenAndServe("127.0.0.1:8183", nil)
   if err != nil {
      fmt.Println("有错误: ", err)
   }
}

httptest

import (
   "fmt"
   "net/http"
   "net/http/httptest"
   "testing"
)

func TestMyHandler(t *testing.T) {
   //创建一个请求
   req, err := http.NewRequest("GET", "/health", nil)
   if err != nil {
      t.Fatal(err)
   }

   // 我们创建一个 ResponseRecorder (which satisfies http.ResponseWriter)来记录响应
   rr := httptest.NewRecorder()

   //直接使用myHandler，传入参数rr,req
   myHandler(rr, req)

   // 检测返回的状态码
   if status := rr.Code; status != http.StatusOK {
      t.Errorf("返回的状态码是: %v",
         status)
   }
   // 检测返回的数据
   fmt.Println(rr.Body.String())
}