5.7 کتابخانه http سمت سرور پیشرفته

 1package main
 2
 3import (
 4	"encoding/json"
 5	"fmt"
 6  "log"
 7	"net/http"
 8)
 9
10// todo struct  with json tags
11type Todo struct {
12	ID     int    `json:"id"`
13	Title  string `json:"title"`
14	Status bool   `json:"status"`
15}
16
17// just work as a DB for us!
18var todos []Todo
19
20// get all the items in the Todo list and write it. GET
21func getTodos(w http.ResponseWriter, r *http.Request) {
22	w.Header().Set("Content-Type", "application/json")
23	json.NewEncoder(w).Encode(todos)
24}
25
26// append a new data in array. POST
27func addTodo(w http.ResponseWriter, r *http.Request) {
28	w.Header().Set("Content-Type", "application/json")
29
30	var todo Todo
31	json.NewDecoder(r.Body).Decode(&todo)
32
33 // NOTE: this isn't a good way to set ids in production!
34	todo.ID = len(todos) + 1
35	todos = append(todos, todo)
36
37	json.NewEncoder(w).Encode(todo)
38}
39
40// change the todo status. PATCH
41func updateTodo(w http.ResponseWriter, r *http.Request) {
42	w.Header().Set("Content-Type", "application/json")
43
44	var todo Todo
45	json.NewDecoder(r.Body).Decode(&todo)
46
47	for i, t := range todos {
48		if t.ID == todo.ID {
49			todos[i].Status = todo.Status
50			json.NewEncoder(w).Encode(todos[i])
51			return
52		}
53	}
54
55	w.WriteHeader(http.StatusNotFound)
56	json.NewEncoder(w).Encode(map[string]string{"message": "TODO not found"})
57}
58
59// remove the TODO from array. DELETE
60func deleteTodo(w http.ResponseWriter, r *http.Request) {
61	w.Header().Set("Content-Type", "application/json")
62
63	var todo Todo
64	json.NewDecoder(r.Body).Decode(&todo)
65
66	for i, t := range todos {
67		if t.ID == todo.ID {
68			todos = append(todos[:i], todos[i+1:]...)
69			json.NewEncoder(w).Encode(map[string]string{"message": "TODO deleted"})
70			return
71		}
72	}
73
74	w.WriteHeader(http.StatusNotFound)
75	json.NewEncoder(w).Encode(map[string]string{"message": "TODO not found"})
76}
77
78
79func main() {
80  // set routes
81	http.HandleFunc("/todos", getTodos)
82	http.HandleFunc("/todos/add", addTodo)
83	http.HandleFunc("/todos/update", updateTodo)
84	http.HandleFunc("/todos/delete", deleteTodo)
85
86  // start server
87	fmt.Println("Server starting at port 8080")
88	log.Fatal(http.ListenAndServe(":8080", nil))
89}

1{
2    "title":"todo1 test"
3}

1{
2    "id": 1,
3    "title": "todo1 test",
4    "status": false
5}

1[
2    {
3        "id": 1,
4        "title": "todo1 test",
5        "status": false
6    },
7  //...
8]

1{
2    "id":1,
3    "status":true
4}

1{
2    "id": 1,
3    "title": "todo1 test",
4    "status": true
5}

1{
2    "id":1
3}

1{
2    "message": "TODO deleted"
3}