casbin测试包引用问题解决

示例程序

基于casbin的权限管理示例

参考:http://www.topgoer.com/gin框架/其他/权限管理.html

示例代码：


package main

import (
	"fmt"
	"log"

	"github.com/casbin/casbin"
	xormadapter "github.com/casbin/xorm-adapter"
	"github.com/gin-gonic/gin"
	_ "github.com/go-sql-driver/mysql"
)

func main() {
	// 要使用自己定义的数据库rbac_db,最后的true很重要.默认为false,使用缺省的数据库名casbin,不存在则创建
	a, err := xormadapter.NewAdapter("mysql", "root:123456@tcp(127.0.0.1:3306)/goblog?charset=utf8", true)
	if err != nil {
		log.Printf("连接数据库错误: %v", err)
		return
	}
	e, err := casbin.NewEnforcer("./rbac_models.conf", a)
	if err != nil {
		log.Printf("初始化casbin错误: %v", err)
		return
	}
	//从DB加载策略
	e.LoadPolicy()

	//获取router路由对象
	r := gin.New()

	r.POST("/api/v1/add", func(c *gin.Context) {
		fmt.Println("增加Policy")
		if ok, _ := e.AddPolicy("admin", "/api/v1/hello", "GET"); !ok {
			fmt.Println("Policy已经存在")
		} else {
			fmt.Println("增加成功")
		}
	})
	//删除policy
	r.DELETE("/api/v1/delete", func(c *gin.Context) {
		fmt.Println("删除Policy")
		if ok, _ := e.RemovePolicy("admin", "/api/v1/hello", "GET"); !ok {
			fmt.Println("Policy不存在")
		} else {
			fmt.Println("删除成功")
		}
	})
	//获取policy
	r.GET("/api/v1/get", func(c *gin.Context) {
		fmt.Println("查看policy")
		list := e.GetPolicy()
		for _, vlist := range list {
			for _, v := range vlist {
				fmt.Printf("value: %s, ", v)
			}
		}
	})
	//使用自定义拦截器中间件
	r.Use(Authorize(e))
	//创建请求
	r.GET("/api/v1/hello", func(c *gin.Context) {
		fmt.Println("Hello 接收到GET请求..")
	})

	r.Run(":9000") //参数为空 默认监听8080端口
}

//拦截器
func Authorize(e *casbin.Enforcer) gin.HandlerFunc {

	return func(c *gin.Context) {

		//获取请求的URI
		obj := c.Request.URL.RequestURI()
		//获取请求方法
		act := c.Request.Method
		//获取用户的角色
		sub := "admin"

		//判断策略中是否存在
		if ok, _ := e.Enforce(sub, obj, act); ok {
			fmt.Println("恭喜您,权限验证通过")
			c.Next()
		} else {
			fmt.Println("很遗憾,权限验证没有通过")
			c.Abort()
		}
	}
}

go.mod文件


module haedu-rbac/casbin-test

go 1.15

使用 go mod tidy 命令：


$ go mod tidy
go: finding module for package github.com/casbin/casbin
go: finding module for package github.com/go-sql-driver/mysql
go: finding module for package github.com/casbin/xorm-adapter
go: finding module for package github.com/gin-gonic/gin
go: found github.com/casbin/casbin in github.com/casbin/casbin v1.9.1
go: found github.com/casbin/xorm-adapter in github.com/casbin/xorm-adapter v1.0.0
go: found github.com/gin-gonic/gin in github.com/gin-gonic/gin v1.6.3
go: found github.com/go-sql-driver/mysql in github.com/go-sql-driver/mysql v1.5.0
go: finding module for package github.com/lib/pq
go: finding module for package github.com/go-xorm/xorm
go: found github.com/go-xorm/xorm in github.com/go-xorm/xorm v0.7.9
go: found github.com/lib/pq in github.com/lib/pq v1.8.0
go: finding module for package github.com/kr/pretty
go: found github.com/kr/pretty in github.com/kr/pretty v0.2.1

执行之后go.mod文件：


module haedu-rbac/casbin-test

go 1.15

require (
	github.com/casbin/casbin v1.9.1
	github.com/casbin/xorm-adapter v1.0.0
	github.com/gin-gonic/gin v1.6.3
	github.com/go-sql-driver/mysql v1.5.0
	github.com/go-xorm/xorm v0.7.9 // indirect
	github.com/kr/pretty v0.2.1 // indirect
	github.com/lib/pq v1.8.0 // indirect
)

示例程序提示的错误

提示返回参数不正确，查看NewAdapter源码：

发现此版本的确返回一个参数。对比github的源码，而是返回的两个参数：

go.mod更改xorm-adapter版本

更改：

github.com/casbin/xorm-adapter v1.0.0

为：

github.com/casbin/xorm-adapter master

执行 go mod tidy 命令，最终显示为：

github.com/casbin/xorm-adapter v1.0.1-0.20191120030838-267478260350

【注】其他类库雷同错误也可按照以上步骤解决。

最终go.mod文件：


module haedu-rbac/casbin-test

go 1.15

require (
	github.com/casbin/casbin/v2 v2.14.2
	github.com/casbin/xorm-adapter v1.0.1-0.20191120030838-267478260350
	github.com/gin-gonic/gin v1.6.3
	github.com/go-sql-driver/mysql v1.5.0
	github.com/kr/pretty v0.2.1 // indirect
	github.com/lib/pq v1.8.0 // indirect
)

修改main.go中import包


import (
	"fmt"
	"log"

	casbin "github.com/casbin/casbin/v2"
	xormadapter "github.com/casbin/xorm-adapter"
	"github.com/gin-gonic/gin"
	_ "github.com/go-sql-driver/mysql"
)

casbin加上版本号~~~