[TOC] ## HellWorld ### 獲取 get / post / file 參數 main.go ``` package main import "github.com/gin-gonic/gin" func main() { router := gin.Default() // Param 獲取 :name 的值 router.GET("/user/:name", func(c *gin.Context) { name := c.Param("name") c.String(http.StatusOK, "Hello %s", name) }) router.GET("/user/:name/*action", func(c *gin.Context) { name := c.Param("name") action := c.Param("action") message := name + " is " + action c.String(http.StatusOK, message) }) router.POST("/user/:name/*action", func(c *gin.Context) { c.FullPath() == "/user/:name/*action" // true }) //獲取 get 參數 router.GET("/welcome", func(c *gin.Context) { firstname := c.DefaultQuery("firstname", "Guest") lastname := c.Query("lastname") // 等于 c.Request.URL.Query().Get("lastname") c.String(http.StatusOK, "Hello %s %s", firstname, lastname) }) //獲取 form 表單的值 router.POST("/form_post", func(c *gin.Context) { message := c.PostForm("message") nick := c.DefaultPostForm("nick", "anonymous") c.JSON(200, gin.H{ "status": "posted", "message": message, "nick": nick, }) }) //文件獲取 router.POST("/upload", func(c *gin.Context) { // router.MaxMultipartMemory = 8 << 20 // 8 MiB (default is 32 MiB) file, _ := c.FormFile("file") log.Println(file.Filename) // c.SaveUploadedFile(file, dst) c.String(http.StatusOK, fmt.Sprintf("'%s' uploaded!", file.Filename)) }) //多文件上傳 router.POST("/upload", func(c *gin.Context) { form, _ := c.MultipartForm() files := form.File["upload[]"] for _, file := range files { log.Println(file.Filename) // c.SaveUploadedFile(file, dst) } c.String(http.StatusOK, fmt.Sprintf("%d files uploaded!", len(files))) }) router.Run(":8080") } ``` `go run main.go`