API Reference

Cpnucleo exposes three API services: the WebApi (REST), the IdentityApi (authentication), and the GrpcServer (gRPC command handling).

WebApi — REST Endpoints

The WebApi uses FastEndpoints to define REST endpoints with Swagger/OpenAPI documentation. Each entity has 5 standard CRUD endpoints.

Base URL

• Direct: http://localhost:5100
• Via NGINX load balancer: http://localhost:9999

Swagger

Available in Development mode at /swagger.

Endpoint Pattern

Every entity follows this consistent pattern:

Available Entities

Example: Create Appointment

Request:

POST /api/appointment
Content-Type: application/json

{
  "id": "00000000-0000-0000-0000-000000000000",
  "description": "Sprint planning meeting",
  "keepDate": "2025-03-01T10:00:00Z",
  "amountHours": 2,
  "assignmentId": "...",
  "userId": "..."
}

Response (200 OK):

{
  "appointment": {
    "id": "...",
    "description": "Sprint planning meeting",
    "keepDate": "2025-03-01T10:00:00Z",
    "amountHours": 2,
    "assignmentId": "...",
    "userId": "...",
    "createdAt": "...",
    "active": true
  }
}

Data Access

All WebApi endpoints use EF Core via IApplicationDbContext for database operations. Endpoints inject the context directly:

public class Endpoint(IApplicationDbContext dbContext) : Endpoint<Request, Response>

Rate Limiting

• 50 requests per minute per IP address
• Fixed-window partitioning
• Queue limit: 10 additional requests
• Returns 429 Too Many Requests with Retry-After: 60 header when exceeded

API Client Generation

The WebApi generates downloadable API clients via Kiota:

• C# client: Available at /cs-client
• TypeScript client: Generated during build

IdentityApi — Authentication

Base URL

http://localhost:5200

Swagger

Available in Development mode at /swagger.

Login Endpoint

Request:

POST /api/login
Content-Type: application/json

{
  "login": "user@example.com",
  "password": "password123"
}

Response (200 OK):

{
  "token": "eyJhbGciOiJIUzI1NiIs..."
}

Response (404 Not Found):

Returned when credentials are invalid.

JWT Configuration

Rate Limiting

• 10 requests per minute per IP address
• Queue limit: 3 additional requests
• Stricter than WebApi to protect against brute-force attacks

Output Caching

• Base policy: 10-second cache expiration
• All responses are cached by default

GrpcServer — Remote Command Handling

The GrpcServer uses FastEndpoints.Messaging.Remote to handle commands over HTTP/2 gRPC transport.

Ports

• gRPC transport: http://localhost:5300 (HTTP/2)
• Health check: http://localhost:5301/healthz (HTTP/1.1)

Command Pattern

Each operation is a command/result pair defined in GrpcServer.Contracts:

Command -> Handler -> Result

Available Commands (per entity)

Each of the 11 entities has these 5 commands:

Total: 55 registered command handlers.

Data Access

All gRPC handlers use Dapper via IUnitOfWork for database operations, providing transactional support with explicit BeginTransactionAsync, CommitAsync, and RollbackAsync.

Handler Registration

Handlers are registered in Program.cs:

app.MapHandlers(h =>
{
    h.Register<CreateAppointmentCommand, CreateAppointmentHandler, CreateAppointmentResult>();
    h.Register<GetAppointmentByIdCommand, GetAppointmentByIdHandler, GetAppointmentByIdResult>();
    // ... 53 more handlers
});

Health Checks

All three APIs expose health check endpoints:

Root Endpoint

All services also respond to GET / with "Hello World!".

Authentication Flow

JWT authentication is configured but currently commented out in WebApi and GrpcServer. The IdentityApi is fully functional for token generation. When enabled:

1. Client authenticates via POST /api/login on IdentityApi
2. Receives JWT token
3. Includes token in Authorization: Bearer {token} header for WebApi/GrpcServer requests
4. Token validation checks issuer, audience, signing key, and expiration