API Gateway Configuration

Centralize API gateway configuration for microservices with service-specific rate limiting, authentication strategies, and CORS policies.

The Problem

API gateways require dozens of similar route definitions with slight variations:

• Repetitive configs — Copy-pasting route definitions
• Inconsistent settings — Easy to miss rate limits or auth rules
• Hard to maintain — Adding a service requires updating multiple places

The JSSON Solution

JSSON

routes [
template { service, version, basePath }

map (route) = {
  id = route.service + "-v" + route.version
  service = route.service
  path = "/api/v" + route.version + "/" + route.basePath

  // Auth based on version
  authType = route.version >= 2 ? "jwt" : "basic"
  tokenExpiry = route.version >= 3 ? 3600 : 7200

  // Rate limiting based on service
  requestsPerMinute = route.service == "auth" ? 100 : (route.service == "payment" ? 50 : 1000)
  burstSize = route.service == "payment" ? 10 : 100

  // CORS
  allowMethods = ["GET", "POST", "PUT", "DELETE"]
  allowHeaders = ["Content-Type", "Authorization"]

  // Caching
  cacheEnabled = route.service == "catalog" ? true : false
  cacheTTL = 300
}

"auth", 2, "auth"
"payment", 2, "payments"
"catalog", 3, "products"
"users", 2, "users"
]

JSON Output

{
"routes": [
  {
    "id": "auth-v2",
    "service": "auth",
    "path": "/api/v2/auth",
    "authType": "jwt",
    "tokenExpiry": 7200,
    "requestsPerMinute": 100,
    "burstSize": 100,
    "allowMethods": ["GET", "POST", "PUT", "DELETE"],
    "allowHeaders": ["Content-Type", "Authorization"],
    "cacheEnabled": false,
    "cacheTTL": 300
  }
  // ... more routes
]
}

Key Features

Arrays in Objects

allowMethods = ["GET", "POST", "PUT", "DELETE"]
allowHeaders = ["Content-Type", "Authorization"]

Nested Ternary Logic

requestsPerMinute = route.service == "auth" ? 100 : (route.service == "payment" ? 50 : 1000)

Different rate limits per service type!

When to Use

✅ Perfect for:

• API gateway configurations
• Microservices routing
• Rate limiting policies
• CORS management

Try It!

1. Save to api-gateway.jsson
2. Run: jsson -i api-gateway.jsson
3. Configure your gateway!

What’s Next?

• Feature Flags — Environment configs
• i18n — Multi-language support

Centralize your API config! 🌐