一，安装casbin

1,casbin项目代码的地址

https://github.com/casbin/casbin

2,为go安装casbin

liuhongdi@ku:~$ go get -u github.com/casbin/casbin/v2

说明：刘宏缔的go森林是一个专注golang的博客，
          地址：https://blog.csdn.net/weixin_43881017

说明：作者:刘宏缔 邮箱: [email protected]

二，演示项目的相关信息

1，项目地址

https://github.com/liuhongdi/digv11

2,项目功能说明：

   /admin/* :只有role为 superAdmin时可访问

  /article/* : role为superAdmin/user时均可访问

  /home/*:   role为任何用户时均可访问

3，项目结构：如图:

三，配置文件说明:

1,config/rbac_model.conf

1.  
   # Request definition 自定义请求的格式
2.  
   [request_definition]
3.  
   r = sub, obj, act
4.  
    
5.  
   # Policy definition 策略定义
6.  
   [policy_definition]
7.  
   p = sub, obj, act
8.  
    
9.  
   # Policy effect
10.  
    [policy_effect]
11.  
    e = some(where (p.eft == allow))
12.  
     
13.  
    # Matchers
14.  
    [matchers]
15.  
    #m = r.sub == p.sub && r.obj == p.obj && r.act == p.act
16.  
    m = (r.sub == p.sub || p.sub == "*") && keyMatch(r.obj,p.obj) && (r.act == p.act || p.act == "*")

2,rbac2.csv

1.  
   p,superAdmin,/article/*,*
2.  
   p,superAdmin,/admin/*,*
3.  
   p,*,/home/*,*
4.  
   p,user,/article/*,*

说明：csv文件必须用相应的软件生成,如图:

四，go代码说明

1,homeController.go

1.  
   package controller
2.  
    
3.  
   import (
4.  
   "github.com/gin-gonic/gin"
5.  
   "github.com/liuhongdi/digv11/pkg/result"
6.  
   )
7.  
    
8.  
   type HomeController struct{}
9.  
    
10.  
    func NewHomeController() HomeController {
11.  
    return HomeController{}
12.  
    }
13.  
    //首页，任何人可访问，不登录也可访问
14.  
    func (a *HomeController) Home(c *gin.Context) {
15.  
    resultRes := result.NewResult(c)
16.  
    resultRes.Success("this is home page");
17.  
    return
18.  
    }

2,adminController.go

1.  
   package controller
2.  
    
3.  
   import (
4.  
   "github.com/gin-gonic/gin"
5.  
   "github.com/liuhongdi/digv11/pkg/result"
6.  
   )
7.  
    
8.  
   type HomeController struct{}
9.  
    
10.  
    func NewHomeController() HomeController {
11.  
    return HomeController{}
12.  
    }
13.  
    //首页，任何人可访问，不登录也可访问
14.  
    func (a *HomeController) Home(c *gin.Context) {
15.  
    resultRes := result.NewResult(c)
16.  
    resultRes.Success("this is home page");
17.  
    return
18.  
    }

3,ArticleController.go

1.  
   package controller
2.  
    
3.  
   import (
4.  
   "fmt"
5.  
   "github.com/gin-gonic/gin"
6.  
   "github.com/liuhongdi/digv11/pkg/page"
7.  
   "github.com/liuhongdi/digv11/pkg/result"
8.  
   "github.com/liuhongdi/digv11/pkg/validCheck"
9.  
   "github.com/liuhongdi/digv11/request"
10.  
    "github.com/liuhongdi/digv11/service"
11.  
    )
12.  
     
13.  
    type ArticleController struct{}
14.  
     
15.  
    func NewArticleController() ArticleController {
16.  
    return ArticleController{}
17.  
    }
18.  
    //得到一篇文章的详情
19.  
    func (a *ArticleController) GetOne(c *gin.Context) {
20.  
    result := result.NewResult(c)
21.  
    param := request.ArticleRequest{ID: validCheck.StrTo(c.Param("id")).MustUInt64()}
22.  
    valid, errs := validCheck.BindAndValid(c, &param)
23.  
    if !valid {
24.  
    result.Error(400,errs.Error())
25.  
    return
26.  
    }
27.  
     
28.  
    if (param.ID == 100) {
29.  
    var z int = 0
30.  
    var i int = 100 / z
31.  
    fmt.Println("i:%i",i)
32.  
    }
33.  
     
34.  
    articleOne,err := service.GetOneArticle(param.ID);
35.  
    if err != nil {
36.  
    result.Error(404,"数据查询错误")
37.  
    } else {
38.  
    result.Success(&articleOne);
39.  
    }
40.  
    return
41.  
    }
42.  
     

4,global/casbin.go

1.  
   package global
2.  
    
3.  
   import (
4.  
   "fmt"
5.  
   "github.com/casbin/casbin/v2"
6.  
   "log"
7.  
   "os"
8.  
   )
9.  
    
10.  
    var (
11.  
    Enforcer *casbin.Enforcer
12.  
    )
13.  
     
14.  
    //创建casbin的enforcer
15.  
    func SetupCasbinEnforcer() (error) {
16.  
    dir, _ := os.Getwd()
17.  
    modelPath := dir + "/config/rbac_model.conf"
18.  
    csvPath := dir + "/config/rbac2.csv"
19.  
    fmt.Println("modelPath:"+modelPath);
20.  
    fmt.Println("csvPath:"+csvPath);
21.  
    var errC error
22.  
    Enforcer, errC = casbin.NewEnforcer(modelPath, csvPath)
23.  
    //fmt.Printf("RBAC test start\n") // output for debug
24.  
    if (errC != nil) {
25.  
    //fmt.Println(errC)
26.  
    log.Fatalf("SetupCasbinEnforcer err: %v", errC)
27.  
    return errC
28.  
    } else {
29.  
    Enforcer.EnableLog(true)
30.  
    return nil
31.  
    }
32.  
    }

5,main.go

1.  
   package main
2.  
    
3.  
   import (
4.  
   "github.com/gin-gonic/gin"
5.  
   _ "github.com/jinzhu/gorm/dialects/mysql"
6.  
   "github.com/liuhongdi/digv11/global"
7.  
   "github.com/liuhongdi/digv11/router"
8.  
   "log"
9.  
   )
10.  
     
11.  
    //init
12.  
    func init() {
13.  
    //setting
14.  
    err := global.SetupSetting()
15.  
    if err != nil {
16.  
    log.Fatalf("init.setupSetting err: %v", err)
17.  
    }
18.  
     
19.  
    //logger
20.  
    err = global.SetupLogger()
21.  
    if err != nil {
22.  
    log.Fatalf("init.SetupLogger err: %v", err)
23.  
    }
24.  
     
25.  
    //access logger
26.  
    err = global.SetupAccessLogger()
27.  
    if err != nil {
28.  
    log.Fatalf("init.SetupAccessLogger err: %v", err)
29.  
    }
30.  
     
31.  
    //casbin
32.  
    err = global.SetupCasbinEnforcer()
33.  
    if err != nil {
34.  
    log.Fatalf("init.SetupCasbinEnforcer err: %v", err)
35.  
    global.Logger.Fatalf("init.SetupCasbinEnforcer err: %v", err)
36.  
    }
37.  
     
38.  
    //db
39.  
    err = global.SetupDBLink()
40.  
    if err != nil {
41.  
    log.Fatalf("init.SetupLogger err: %v", err)
42.  
    global.Logger.Fatalf("init.setupDBEngine err: %v", err)
43.  
    }
44.  
     
45.  
    global.Logger.Infof("------应用init结束")
46.  
    //global.Logger.
47.  
    }
48.  
     
49.  
    func main() {
50.  
     
51.  
     
52.  
    global.Logger.Infof("------应用main函数开始")
53.  
    //设置运行模式
54.  
    gin.SetMode(global.ServerSetting.RunMode)
55.  
    //引入路由
56.  
    r := router.Router()
57.  
    //run
58.  
    r.Run(":"+global.ServerSetting.HttpPort)
59.  
    }

6,middleware/permission.go

1.  
   package middleware
2.  
    
3.  
   import (
4.  
   "fmt"
5.  
   "github.com/gin-gonic/gin"
6.  
   "github.com/liuhongdi/digv11/global"
7.  
   "github.com/liuhongdi/digv11/pkg/result"
8.  
   )
9.  
    
10.  
    func PermissionMiddleWare() gin.HandlerFunc {
11.  
    return func(c *gin.Context) {
12.  
     
13.  
    // 请求的path
14.  
    p := c.Request.URL.Path
15.  
    // 请求的方法
16.  
    m := c.Request.Method
17.  
     
18.  
    role:="superAdmin"
19.  
    //role:="user"
20.  
    //role:="guest"
21.  
     
22.  
    fmt.Println("role:"+role)
23.  
    fmt.Println("path:"+p)
24.  
    fmt.Println("method:"+m)
25.  
     
26.  
    // 检查用户权限
27.  
    isPass, err := global.Enforcer.Enforce(role, p, m)
28.  
    if err != nil {
29.  
    resultRes := result.NewResult(c)
30.  
    resultRes.Error(2005,err.Error())
31.  
    return
32.  
    }
33.  
    if isPass {
34.  
    c.Next()
35.  
    } else {
36.  
    resultRes := result.NewResult(c)
37.  
    resultRes.Error(2006,"无访问权限")
38.  
    return
39.  
    }
40.  
    }
41.  
    }

7,其他相关代码可访问github

五，测试效果

1,middleware/permission.go中，

  role:="guest"

访问:

http://127.0.0.1:8000/home/home

返回:

访问:

http://127.0.0.1:8000/article/getone/2

返回:

访问:

http://127.0.0.1:8000/admin/admin

返回:

2,middleware/permission.go中，

role:="user"

访问:

http://127.0.0.1:8000/home/home

返回:

访问:

http://127.0.0.1:8000/article/getone/2

返回:

访问:

http://127.0.0.1:8000/admin/admin

返回:

3,middleware/permission.go中，

role:="superAdmin"

访问:

http://127.0.0.1:8000/home/home

返回:

访问:

http://127.0.0.1:8000/article/getone/2

返回:

访问:

http://127.0.0.1:8000/admin/admin

返回:

六，查看库的版本:

1.  
   module github.com/liuhongdi/digv11
2.  
    
3.  
   go 1.15
4.  
    
5.  
   require (
6.  
   github.com/gin-gonic/gin v1.6.3
7.  
   github.com/go-playground/universal-translator v0.17.0
8.  
   github.com/go-playground/validator/v10 v10.2.0
9.  
   github.com/jinzhu/gorm v1.9.16
10.  
    github.com/lestrrat/go-file-rotatelogs v0.0.0-20180223000712-d3151e2a480f
11.  
    github.com/lestrrat/go-strftime v0.0.0-20180220042222-ba3bf9c1d042 // indirect
12.  
    github.com/magiconair/properties v1.8.4 // indirect
13.  
    github.com/mitchellh/mapstructure v1.3.3 // indirect
14.  
    github.com/pelletier/go-toml v1.8.1 // indirect
15.  
    github.com/pkg/errors v0.9.1 // indirect
16.  
    github.com/spf13/afero v1.4.1 // indirect
17.  
    github.com/spf13/cast v1.3.1 // indirect
18.  
    github.com/spf13/jwalterweatherman v1.1.0 // indirect
19.  
    github.com/spf13/pflag v1.0.5 // indirect
20.  
    github.com/spf13/viper v1.7.1
21.  
    github.com/casbin/casbin/v2 v2.17.0
22.  
    go.uber.org/multierr v1.6.0 // indirect
23.  
    go.uber.org/zap v1.16.0
24.  
    golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
25.  
    golang.org/x/text v0.3.4 // indirect
26.  
    gopkg.in/ini.v1 v1.62.0 // indirect
27.  
    gopkg.in/yaml.v2 v2.3.0 // indirect
28.  
    )