go Gin安裝及初始化操作示例
第一步初始化
1.新建文件夾(項(xiàng)目名)
2.終端進(jìn)入該項(xiàng)目,敲 go mod init gin-class 產(chǎn)生go.mode文件
3.golang打開(kāi),Go Modules設(shè)置GOPROXY=https://goproxy.io
4.新建mian.go,下面代碼粘貼進(jìn)去
5.運(yùn)行
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() r.GET("/ping", func(c *gin.Context) { c.JSON(200, gin.H{ "message": "pong", }) }) r.Run() // listen and serve on 0.0.0.0:8080 }
修改啟動(dòng)端口
# 默認(rèn)是8080端口 r.Run(":8888")
get請(qǐng)求url取參數(shù)
//get請(qǐng)求 "/get/123?user=jeff&pwd=admin" r.GET("/get/:id", func(c *gin.Context) { id := c.Param("id") user := c.DefaultQuery("user","jeff") pwd := c.Query("pwd") c.JSON(200, gin.H{ "message": "hell gyy", "id":id, "user":user, "pwd":pwd, }) })
Param
:取“?”之前的參數(shù)
Query
:取“?”之后的參數(shù)
DefaultQuery
:優(yōu)先取key值,沒(méi)有就用默認(rèn)值
Post請(qǐng)求獲取form參數(shù)
r.POST("/post", func(c *gin.Context) { user := c.DefaultPostForm("user","jeff") pwd := c.PostForm("pwd") c.JSON(200, gin.H{ "message": "hell gyy", "user":user, "pwd":pwd, }) })
DefaultPostForm
:優(yōu)先取key值,沒(méi)有就用默認(rèn)值
PostForm
:取key
模型綁定ShouldBind
ShouldBindJSON
package main import "github.com/gin-gonic/gin" type PostParams struct { Name string `json:"name"` Age int `json:"age"` Sex bool `json:"sex"` } func main() { r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindJSON(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出錯(cuò)!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 }
ShouldBinduri
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() //攜帶中間件啟動(dòng)路由 r.POST("/testBind/:name/:age/:sex", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindUri(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出錯(cuò)!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 } type PostParams struct { Name string `json:"name" uri:"name"` Age int `json:"age" uri:"age"` Sex bool `json:"sex" uri:"ses"` }
ShouldBindQuery
package main import "github.com/gin-gonic/gin" func main() { r := gin.Default() //攜帶中間件啟動(dòng)路由 r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindQuery(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"出錯(cuò)!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 } type PostParams struct { Name string `json:"name" uri:"name" form:"name"` Age int `json:"age" uri:"age" form:"age"` Sex bool `json:"sex" uri:"ses" form:"sex"` }
自定義驗(yàn)證器,表單驗(yàn)證
binding:"required,mustBig"
package main import ( "github.com/gin-gonic/gin" "github.com/gin-gonic/gin/binding" "github.com/go-playground/validator/v10" ) type PostParams struct { Name string `json:"name" uri:"name" form:"name"` Age int `json:"age" uri:"age" form:"age" binding:"required,mustBig"` Sex bool `json:"sex" uri:"ses" form:"sex"` } // 過(guò)濾年齡小于18 func mustBig(f1 validator.FieldLevel) bool { if f1.Field().Interface().(int) <=18{ return false } return true } func main() { r := gin.Default() //攜帶中間件啟動(dòng)路由 if v, ok := binding.Validator.Engine().(*validator.Validate); ok { v.RegisterValidation("mustBig", mustBig) } r.POST("/testBind", func(c *gin.Context) { p := PostParams{} err := c.ShouldBindJSON(&p) if err != nil{ c.JSON(400,gin.H{ "msg":"小于18歲了!", "data":gin.H{}, }) }else{ c.JSON(200,gin.H{ "msg":"success", "data":p, }) } c.JSON(200, gin.H{ }) }) r.Run(":8888") // listen and serve on 0.0.0.0:8080 }
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