Authz is an authorization middleware for Gin, it's based on https://github.com/casbin/casbin.

go get github.com/gin-contrib/authz

package main

import (
  "net/http"

  "github.com/casbin/casbin/v2"
  "github.com/gin-contrib/authz"
  "github.com/gin-gonic/gin"
)

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()
  router.Use(authz.NewAuthorizer(e))
}

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.

• Casbin

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