Question 1

What is Casbin?

Accepted Answer

Casbin is an authorization library that supports access control models like ACL, RBAC, ABAC for various programming languages including Golang, Java, C/C++, Node.js, JavaScript, PHP, Laravel, Python, .NET (C#), Delphi, Rust, Ruby, Swift (Objective-C), Lua (OpenResty), Dart (Flutter), and Elixir.

Question 2

What features does Casbin offer?

Accepted Answer

Casbin offers several features, including:
- Support for various access control models like ACL, RBAC, ABAC
- Flexible policy storage options, including databases, files, and in-memory
- Cross-language and cross-platform support, with consistent APIs across different implementations
- Easy switching or upgrading of authorization mechanisms by modifying a configuration file

Question 3

What languages and platforms does Casbin support?

Accepted Answer

Casbin is implemented in Golang, Java, PHP, and Node.js, and supports a wide range of programming languages and platforms, including C/C++, JavaScript, Laravel, Python, .NET (C#), Delphi, Rust, Ruby, Swift (Objective-C), Lua (OpenResty), Dart (Flutter), and Elixir.

Question 4

How does Casbin handle policy management?

Accepted Answer

In Casbin, an access control model is abstracted into a configuration file based on the PERM metamodel (policy, effect, request, matchers). This allows for easy switching or upgrading of the authorization mechanism by simply modifying the configuration file, without the need to change the underlying code.

Question 5

What are the use cases for Casbin?

Accepted Answer

Casbin can be used in a variety of applications that require access control, such as web applications, microservices, cloud-native environments (Kubernetes, Istio, Envoy, KubeSphere), and more. Its flexible and cross-language/platform support makes it a versatile choice for many authorization needs.

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