## 路由定義
應用啟動文件中定義的路由初始化函數（ApiInit）中定義路由方法
引入路由使用到的控制器包
```
package router
import (
"github.com/gin-gonic/gin"
"project/controller/v1"
)
func ApiInit(router *gin.Engine){
router.POST("/login", v1.Login)
router.GET("/article", v1.Article{}.GetList
}
```
訪問靜態資源文件
`router.Static("路由規則", "靜態資源目錄")`
```
router.Static("/statics", "./statics")
```
## 路由參數
```
// 此 handler 將匹配 /user/john 但不會匹配 /user/ 或者 /user
router.GET("/user/:name", func(c *gin.Context) {
name := c.Param("name")
c.String(http.StatusOK, "Hello %s", name)
})
```
**允許跨域**
在common公共庫中設置請求頭允許跨域訪問
```
package common
import (
"github.com/gin-gonic/gin"
)
func Cors() gin.HandlerFunc {
return func(c *gin.Context) {
c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
c.Writer.Header().Set("Access-Control-Max-Age", "86400")
c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, Token")
c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
if c.Request.Method == "OPTIONS" {
c.AbortWithStatus(200)
} else {
c.Next()
}
}
}
```
路由中使用跨域方法
```
router.Use(common.Cors())
```
## 路由分組
```
package router
import (
"github.com/gin-gonic/gin"
"project/controller/v2"
)
func V2Init(router *gin.Engine){
router.Use(common.Cors())
V2 := router.Group("/V2")
V2.Use(middleware.AuthMiddleWare())
{
V2.GET("/article", v2.Article{}.GetList)
}
}
```
