HelloWorld
最后更新于：2022-04-02 02:48:16
[TOC]
## HellWorld
### 获取 get / post / file 参数
main.go
```
package main
import "github.com/gin-gonic/gin"
func main() {
router := gin.Default()
// Param 获取 :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
})
//获取 get 参数
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)
})
//获取 form 表单的值
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,
})
})
//文件获取
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))
})
//多文件上传
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`
';