casbinauthz

README

modules/casbin

Casbin authz is an authorization middleware for Revel, it's based on https://github.com/casbin/casbin.

Simple Example

package main

import (
	"net/http"
	"net/http/httptest"

	"github.com/casbin/casbin"
	"github.com/caeril/frevel/revel"
	"github.com/caeril/frevel/modules/auth/casbin"
)

var adapter = casbinauth.NewAdapter(params)
var enforcer = casbin.NewEnforcer("authz_model.conf", adapter)
var casbinModule = casbinauth.NewCasbinModule(enforcer)

var testFilters = []revel.Filter{
	casbinModule.AuthzFilter,
	func(c *revel.Controller, fc []revel.Filter) {
		c.RenderHTML("OK.")
	},
}

func main() {
	r, _ := http.NewRequest("GET", "/dataset1/resource1", nil)
    	r.SetBasicAuth("alice", "123")
    	w := httptest.NewRecorder()
    	context := revel.NewGoContext(nil)
    	context.Request.SetRequest(r)
    	context.Response.SetResponse(w)
    	c := revel.NewController(context)
    
    	testFilters[0](c, testFilters)
}

Documentation

The authorization determines a request based on {subject, object, action}, which means what subject can perform what action on what object. In this plugin, the meanings are:

1. subject: the logged-on user name
2. object: the URL path for the web resource like "dataset1/item1"
3. action: HTTP method like GET, POST, PUT, DELETE, or the high-level actions you defined like "read-file", "write-blog"

For how to write authorization policy and other details, please refer to the Casbin's documentation.

Documentation

Index

• func CheckPermission(e *casbin.Enforcer, r *revel.Request) bool
• func GetUserName(r *revel.Request) string
• type Adapter
  • func NewAdapter(params gormdb.DbInfo) *Adapter
  • func (a *Adapter) AddPolicy(sec string, ptype string, rule []string) error
  • func (a *Adapter) LoadPolicy(model model.Model) error
  • func (a *Adapter) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error
  • func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error
  • func (a *Adapter) SavePolicy(model model.Model) error
• type CasbinModule
  • func NewCasbinModule(enforcer *casbin.Enforcer) *CasbinModule
  • func (cm *CasbinModule) AuthzFilter(c *revel.Controller, fc []revel.Filter)
• type Line

Functions

func CheckPermission

func CheckPermission(e *casbin.Enforcer, r *revel.Request) bool

CheckPermission checks the user/method/path combination from the request. Returns true (permission granted) or false (permission forbidden)

func GetUserName

func GetUserName(r *revel.Request) string

GetUserName gets the user name from the request. Currently, only HTTP basic authentication is supported

Types

type Adapter

type Adapter struct {
	// contains filtered or unexported fields
}

Adapter represents the Gorm adapter for policy storage.

func NewAdapter

func NewAdapter(params gormdb.DbInfo) *Adapter

NewAdapter is the constructor for Adapter.

func (*Adapter) AddPolicy

func (a *Adapter) AddPolicy(sec string, ptype string, rule []string) error

AddPolicy adds a policy rule to the storage.

func (*Adapter) LoadPolicy

func (a *Adapter) LoadPolicy(model model.Model) error

LoadPolicy loads policy from database.

func (*Adapter) RemoveFilteredPolicy

func (a *Adapter) RemoveFilteredPolicy(sec string, ptype string, fieldIndex int, fieldValues ...string) error

RemoveFilteredPolicy removes policy rules that match the filter from the storage.

func (*Adapter) RemovePolicy

func (a *Adapter) RemovePolicy(sec string, ptype string, rule []string) error

RemovePolicy removes a policy rule from the storage.

func (*Adapter) SavePolicy

func (a *Adapter) SavePolicy(model model.Model) error

SavePolicy saves policy to database.

type CasbinModule

type CasbinModule struct {
	// contains filtered or unexported fields
}

func NewCasbinModule

func NewCasbinModule(enforcer *casbin.Enforcer) *CasbinModule

func (*CasbinModule) AuthzFilter

func (cm *CasbinModule) AuthzFilter(c *revel.Controller, fc []revel.Filter)

AuthzFilter enables the authorization based on Casbin.

Usage:

1. Add `casbin.AuthzFilter` to the app's filters (it must come after the authentication).
2. Init the Casbin enforcer.

type Line

type Line struct {
	PType string `gorm:"size:100"`
	V0    string `gorm:"size:100"`
	V1    string `gorm:"size:100"`
	V2    string `gorm:"size:100"`
	V3    string `gorm:"size:100"`
	V4    string `gorm:"size:100"`
	V5    string `gorm:"size:100"`
}