title: CRUD url: /cookbook/crud menu: side: parent: cookbook

  1. weight: 3

CRUD 示例

服务端

server.go

  1. package main
  3. import (
  4.     "net/http"
  5.     "strconv"
  7.     "github.com/labstack/echo"
  8.     "github.com/labstack/echo/middleware"
  9. )
  11. type (
  12.     user struct {
  13.         ID   int    `json:"id"`
  14.         Name string `json:"name"`
  15.     }
  16. )
  18. var (
  19.     users = map[int]*user{}
  20.     seq   = 1
  21. )
  23. //----------
  24. // Handlers
  25. //----------
  27. func createUser(c echo.Context) error {
  28.     u := &user{
  29.         ID: seq,
  30.     }
  31.     if err := c.Bind(u); err != nil {
  32.         return err
  33.     }
  34.     users[u.ID] = u
  35.     seq++
  36.     return c.JSON(http.StatusCreated, u)
  37. }
  39. func getUser(c echo.Context) error {
  40.     id, _ := strconv.Atoi(c.Param("id"))
  41.     return c.JSON(http.StatusOK, users[id])
  42. }
  44. func updateUser(c echo.Context) error {
  45.     u := new(user)
  46.     if err := c.Bind(u); err != nil {
  47.         return err
  48.     }
  49.     id, _ := strconv.Atoi(c.Param("id"))
  50.     users[id].Name = u.Name
  51.     return c.JSON(http.StatusOK, users[id])
  52. }
  54. func deleteUser(c echo.Context) error {
  55.     id, _ := strconv.Atoi(c.Param("id"))
  56.     delete(users, id)
  57.     return c.NoContent(http.StatusNoContent)
  58. }
  60. func main() {
  61.     e := echo.New()
  63.     // Middleware
  64.     e.Use(middleware.Logger())
  65.     e.Use(middleware.Recover())
  67.     // Routes
  68.     e.POST("/users", createUser)
  69.     e.GET("/users/:id", getUser)
  70.     e.PUT("/users/:id", updateUser)
  71.     e.DELETE("/users/:id", deleteUser)
  73.     // Start server
  74.     e.Logger.Fatal(e.Start(":1323"))
  75. }

客户端

curl

创建 User

  1. curl -X POST \
  2.   -H 'Content-Type: application/json' \
  3.   -d '{"name":"Joe Smith"}' \
  4.   localhost:1323/users

Response

  1. {
  2.   "id": 1,
  3.   "name": "Joe Smith"
  4. }

获取 User

  1. curl localhost:1323/users/1

Response

  1. {
  2.   "id": 1,
  3.   "name": "Joe Smith"
  4. }

更新 User

  1. curl -X PUT \
  2.   -H 'Content-Type: application/json' \
  3.   -d '{"name":"Joe"}' \
  4.   localhost:1323/users/1

Response

  1. {
  2.   "id": 1,
  3.   "name": "Joe"
  4. }

删除 User

  1. curl -X DELETE localhost:1323/users/1

Response

NoContent - 204