WebSocket Protocol Comparison

📡 Legacy Custom JSON Protocol

Endpoint: /ws/chat-legacy

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Click Connect to start legacy WebSocket

Message Format:
// Authentication
{"type": "auth", "token": "jwt_here"}

// Chat Message
{"type": "chat", "message": "Hello"}

// Response
{"type": "chat", "username": "AI", "message": "Hi there!", "timestamp": 1234567890}

🚀 STOMP Protocol

Endpoint: /ws/chat (with SockJS)

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Click Connect to start STOMP WebSocket

STOMP Commands:
CONNECT
Authorization: Bearer jwt_token

SEND
destination:/app/chat
{"message": "Hello"}

MESSAGE
destination:/topic/chat
{"sender": "AI", "message": "Hi!"}

📊 Protocol Comparison

Feature	Custom JSON Protocol	STOMP Protocol
Standardization	❌ Custom implementation	✅ Industry standard protocol
Client Libraries	⚠️ Manual implementation needed	✅ Rich ecosystem of libraries
Message Routing	❌ Broadcast only	✅ Topics, queues, user-specific
Authentication	⚠️ Custom JWT in message	✅ Built-in header-based auth
Acknowledgments	❌ No built-in support	✅ Message acknowledgments
Heartbeat	⚠️ Custom ping/pong	✅ Built-in heartbeat mechanism
Error Handling	⚠️ Custom error format	✅ Standardized error frames
Scalability	⚠️ Limited to single server	✅ Supports message brokers
Private Messaging	❌ Not implemented	✅ User-specific destinations
Message Persistence	❌ No persistence	✅ Can integrate with persistent brokers

🎯 When to Use Each Protocol

Custom JSON Protocol

Simple, single-purpose applications
Full control over message format
Minimal dependencies
Educational purposes
Legacy system compatibility

STOMP Protocol

Production applications
Multi-user chat systems
Real-time collaboration tools
Microservices communication
Scalable messaging solutions

💡 Recommendation: Use STOMP for new applications. It provides better standardization, more features, and easier integration with existing messaging infrastructure. The custom JSON protocol can be maintained for backward compatibility.