Add SASL and TLS Authentication Examples for Client Libraries

[johnluoyx]

Description

Currently, the client-examples repository provides basic message production and consumption examples for various programming languages (Java, Python, Go, C++, JavaScript). However, it lacks examples demonstrating secure authentication methods that are commonly used in production environments.

Proposed Enhancement

Add SASL (Simple Authentication and Security Layer) and TLS authentication examples for all supported client libraries:

SASL Authentication Examples

• SASL/PLAIN: Username/password authentication
• SASL/SCRAM-SHA-256: Secure password-based authentication
• SASL/SCRAM-SHA-512: Enhanced secure password-based authentication
• SASL/OAUTHBEARER: OAuth 2.0 bearer token authentication

TLS/SSL Examples

• TLS with server certificate verification
• Mutual TLS (mTLS): Client certificate authentication
• Custom CA certificate configuration
• SSL keystore and truststore setup

Languages to Include

• Java
• Python
• Go
• C++
• JavaScript/Node.js

Benefits

1. Production Readiness: Help developers implement secure connections for production deployments
2. Security Best Practices: Demonstrate proper authentication and encryption setup
3. AutoMQ Integration: Show how to configure secure connections with AutoMQ clusters
4. Developer Experience: Provide ready-to-use examples for common security scenarios

Implementation Suggestions

For each language:

1. Create separate example files for different authentication methods
2. Include comprehensive configuration examples
3. Add Docker Compose files with secure AutoMQ setup
4. Provide clear documentation with step-by-step setup instructions
5. Include troubleshooting guides for common SSL/SASL issues

Example Structure

Priority

This enhancement would significantly improve the repository's value for developers working with secure Kafka/AutoMQ deployments in production environments.

Labels

enhancement, security, documentation, client-examples