RESTful API via Gin

mkdir web-service-gin cd web-service-gin # 初始化项目 go mod init example/web-service-gin

package main import ( "net/http" "github.com/gin-gonic/gin" ) func main() { router := gin.Default() // 定义 get /albums 路由 router.GET("/albums", getAlbums) // 定义服务 endpoint router.Run("localhost:8080") } // albums 转 json 返回请求 func getAlbums(c *gin.Context) { c.IndentedJSON(http.StatusOK, albums) } // 数据示例（应当来自数据库） var albums = []album{ {ID: "1", Title: "Blue Train", Artist: "John Coltrane", Price: 56.99}, {ID: "2", Title: "Jeru", Artist: "Gerry Mulligan", Price: 17.99}, {ID: "3", Title: "Sarah Vaughan and Clifford Brown", Artist: "Sarah Vaughan", Price: 39.99}, } // 定义结构体 type album struct { ID string `json:"id"` Title string `json:"title"` Artist string `json:"artist"` Price float64 `json:"price"` }

// 根据 id 查询 func getAlbumByID(c *gin.Context) { id := c.Param("id") for _, a := range albums { if a.ID == id { c.IndentedJSON(http.StatusOK, a) return } } c.IndentedJSON(http.StatusNotFound, gin.H{"message": "album not found"}) } //============================================================================ // main func //============================================================================ //添加到 router.Run("localhost:8080") 之前 router.GET("/albums/:id", getAlbumByID)

// post 增加数据 func postAlbums(c *gin.Context) { var newAlbum album if err := c.BindJSON(&newAlbum); err != nil { return } albums = append(albums, newAlbum) c.IndentedJSON(http.StatusCreated, newAlbum) } //============================================================================ // main func //============================================================================ //添加到 router.Run("localhost:8080") 之前 router.POST("/albums", postAlbums)

curl http://localhost:8080/albums \ --include \ --header "Content-Type: application/json" \ --request "POST" \ --data '{"id": "4","title": "The Modern Sound of Betty Carter","artist": "Betty Carter","price": 49.99}'