package main  
  
import (  
	"encoding/json"  
	"fmt"  
	"io"  
	"net/http"  
)  
  
func getRequest(w http.ResponseWriter, r *http.Request) {
	switch r.Method {
	case http.MethodGet:

		if r.URL.Query().Get("ID") == "" {
			http.Error(w,"ERROR : id is null",http.StatusBadRequest)
			return
		}
        
		marshal, _ := json.Marshal(struct {
			ID string `json:"ID"`
			Name string `json:"Name"`
		}{
			ID: r.URL.Query().Get("ID"),
			Name: "PostMan GET Method",
		})

		w.Header().Add("Content-Type", "application/json")
		io.WriteString(w, string(marshal[:]))
		break
	case http.MethodPost:

		var data map[string]interface{}

		body, err := ioutil.ReadAll(r.Body)
		if err != nil {
			fmt.Println(err)
		}

		err = json.Unmarshal(body, &data)
		if err != nil {
			http.Error(w, "can not Unmarshal", http.StatusBadRequest)
			return
		}
        
		marshal, _ := json.Marshal(struct {
			Body map[string]interface{} `json:"Body"`
		}{
			Body: data,
		})

		w.Header().Add("Content-Type", "application/json")
		io.WriteString(w, string(marshal[:]))
		break
	case http.MethodPut:

		var data map[string]interface{}

		body, err := ioutil.ReadAll(r.Body)
		if err != nil {
			fmt.Println(err)
		}

		err = json.Unmarshal(body, &data)
		if err != nil {
			http.Error(w, "can not Unmarshal", http.StatusBadRequest)
			return
		}

		marshal, _ := json.Marshal(struct {
			ID string `json:"ID"`
			Name string `json:"Name"`
		}{
			ID: data["ID"].(string),
			Name: "PostMan PUT Method",
		})

		w.Header().Add("Content-Type", "application/json")
		io.WriteString(w, string(marshal[:]))
		break
	case http.MethodDelete:

		if r.URL.Query().Get("ID") == "" {
			http.Error(w,"ERROR : id is null",http.StatusBadRequest)
			return
		}

		marshal, _ := json.Marshal(struct {
			Name string `json:"Name"`
		}{
			Name: "PostMan DELETE Method",
		})

		w.Header().Add("Content-Type", "application/json")
		io.WriteString(w, string(marshal[:]))
		break
	default:
		log.Println("ERROR: Invalid HTTP Method")
		w.WriteHeader(http.StatusBadRequest)
	}
}
  
func main() {  
	// 将你的请求处理程序绑定到/test路径  
	http.HandleFunc("/test", getRequest)  
  
	// 监听1024端口（注意：可能需要root权限或使用高于1024的端口）  
	fmt.Println("Starting server on port 1024...")  
	if err := http.ListenAndServe(":1024", nil); err != nil {  
		fmt.Println("Error starting server:", err)  
	}  
}