lucasfrecia / sql-adapter

database/sql Adapter for Casbin V2

sql-adapter

sql-adapter is a database/sql Adapter for Casbin V2.

With this library, Casbin can load policy lines or save policy lines from supported databases.

Tested Databases

master branch

• SQLite3: github.com/mattn/go-sqlite3
• MySQL(v5.5): github.com/go-sql-driver/mysql
• MariaDB(v10.2): github.com/go-sql-driver/mysql
• PostgreSQL(v9.6): github.com/lib/pq
• SQL Server(v2008R2-SP3): github.com/denisenkom/go-mssqldb

oracle branch

• Oracle(v11.2): github.com/mattn/go-oci8

Installation

go get github.com/Blank-Xu/sql-adapter

Simple Examples

SQLite3

package main

import (
	"database/sql"
	"log" 

	sqladapter "github.com/Blank-Xu/sql-adapter"
	"github.com/casbin/casbin/v2"
	_ "github.com/mattn/go-sqlite3"
)

func main() {
	// connect to the database first.
	db, err := sql.Open("sqlite3", "file:test.db")
	if err != nil {
		panic(err)
	}
	if err = db.Ping();err!=nil{
		panic(err)
	}

	// Initialize an adapter and use it in a Casbin enforcer:
	// The adapter will use the Sqlite3 table name "casbin_rule_test",
	// the default table name is "casbin_rule".
	// If it doesn't exist, the adapter will create it automatically.
	a, err := sqladapter.NewAdapter(db, "sqlite3", "casbin_rule_test")
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	// Load the policy from DB.
	if err = e.LoadPolicy(); err != nil {
		log.Println("LoadPolicy failed, err: ", err)
	}

	// Check the permission.
	has, err := e.Enforce("alice", "data1", "read")
	if err != nil {
		log.Println("Enforce failed, err: ", err)
	}
	if !has {
		log.Println("do not have permission")
	}

	// Modify the policy.
	// e.AddPolicy(...)
	// e.RemovePolicy(...)

	// Save the policy back to DB.
	if err = e.SavePolicy(); err != nil {
		log.Println("SavePolicy failed, err: ", err)
	}
}

MySQL

package main

import (
	"database/sql"
	"log"
	"runtime"
	"time"

	sqladapter "github.com/Blank-Xu/sql-adapter"
	"github.com/casbin/casbin/v2"
	_ "github.com/go-sql-driver/mysql"
)

func finalizer(db *sql.DB) {
	err := db.Close()
	if err != nil {
		panic(err)
	}
}

func main() {
	// connect to the database first.
	db, err := sql.Open("mysql", "root:YourPassword@tcp(127.0.0.1:3306)/YourDBName")
	if err != nil {
		panic(err)
	}
	if err = db.Ping();err!=nil{
		panic(err)
	}

	db.SetMaxOpenConns(20)
	db.SetMaxIdleConns(10)
	db.SetConnMaxLifetime(time.Minute * 10)

	// need to control by user, not the package
	runtime.SetFinalizer(db, finalizer)

	// Initialize an adapter and use it in a Casbin enforcer:
	// The adapter will use the Sqlite3 table name "casbin_rule_test",
	// the default table name is "casbin_rule".
	// If it doesn't exist, the adapter will create it automatically.
	a, err := sqladapter.NewAdapter(db, "mysql", "casbin_rule_test")
	if err != nil {
		panic(err)
	}

	e, err := casbin.NewEnforcer("examples/rbac_model.conf", a)
	if err != nil {
		panic(err)
	}

	// Load the policy from DB.
	if err = e.LoadPolicy(); err != nil {
		log.Println("LoadPolicy failed, err: ", err)
	}

	// Check the permission.
	has, err := e.Enforce("alice", "data1", "read")
	if err != nil {
		log.Println("Enforce failed, err: ", err)
	}
	if !has {
		log.Println("do not have permission")
	}

	// Modify the policy.
	// e.AddPolicy(...)
	// e.RemovePolicy(...)

	// Save the policy back to DB.
	if err = e.SavePolicy(); err != nil {
		log.Println("SavePolicy failed, err: ", err)
	}
}

Getting Help

• Casbin

License

This project is under Apache 2.0 License. See the LICENSE file for the full license text.