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Published: Jul 8, 2020 License: MIT Imports: 5 Imported by: 0



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Authz is an authorization middleware for Gin, it's based on


go get

Simple Example

package main

import (


func main() {
    // load the casbin model and policy from files, database is also supported.
    e := casbin.NewEnforcer("authz_model.conf", "authz_policy.csv")

    // define your router, and use the Casbin authz middleware.
    // the access that is denied by authz will return HTTP 403 error.
    router := gin.New()


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.

Getting Help


This project is under MIT License. See the LICENSE file for the full license text.




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func NewAuthorizer

func NewAuthorizer(e *casbin.Enforcer, jwtKey []byte) gin.HandlerFunc

NewAuthorizer returns the authorizer, uses a Casbin enforcer as input


type BasicAuthorizer

type BasicAuthorizer struct {
	// contains filtered or unexported fields

BasicAuthorizer stores the casbin handler

func (*BasicAuthorizer) CheckPermission

func (a *BasicAuthorizer) CheckPermission(r *http.Request) bool

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

func (*BasicAuthorizer) GetUserName

func (a *BasicAuthorizer) GetUserName(r *http.Request) string

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

func (*BasicAuthorizer) RequirePermission

func (a *BasicAuthorizer) RequirePermission(c *gin.Context)

RequirePermission returns the 403 Forbidden to the client

Source Files

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