Files
Chatbot-ElDia/ChatbotApi/Program.cs
2025-11-18 14:34:26 -03:00

145 lines
4.7 KiB
C#

using ChatbotApi.Data.Models;
using DotNetEnv;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.RateLimiting;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using System.Threading.RateLimiting;
using Microsoft.AspNetCore.Identity;
using Microsoft.OpenApi.Models;
// Cargar variables de entorno desde el archivo .env
Env.Load();
var builder = WebApplication.CreateBuilder(args);
// Definimos una política de CORS para permitir solicitudes desde nuestro frontend de Vite
var myAllowSpecificOrigins = "_myAllowSpecificOrigins";
builder.Services.AddCors(options =>
{
options.AddPolicy(name: myAllowSpecificOrigins,
policy =>
{
policy.WithOrigins("http://localhost:5173", "http://localhost:5174") // La URL de tu frontend
.AllowAnyHeader()
.AllowAnyMethod();
});
});
// 1. Añadimos el DbContext para Entity Framework
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<AppContexto>(options =>
options.UseSqlServer(connectionString));
// 2. Añadimos ASP.NET Core Identity
builder.Services.AddIdentity<IdentityUser, IdentityRole>(options =>
{
options.Password.RequireDigit = true;
options.Password.RequiredLength = 8;
options.Password.RequireNonAlphanumeric = false;
options.Password.RequireUppercase = true;
options.Password.RequireLowercase = false;
})
.AddEntityFrameworkStores<AppContexto>()
.AddDefaultTokenProviders();
builder.Services.AddMemoryCache();
// =========== INICIO DE CONFIGURACIÓN JWT ===========
builder.Services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
options.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ValidateIssuerSigningKey = true,
ValidIssuer = builder.Configuration["Jwt:Issuer"],
ValidAudience = builder.Configuration["Jwt:Audience"],
IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(
builder.Configuration["Jwt:Key"] ?? throw new InvalidOperationException("La clave JWT no está configurada.")
))
};
});
// RATE LIMITING
builder.Services.AddRateLimiter(options =>
{
options.AddFixedWindowLimiter(policyName: "fixed", limiterOptions =>
{
limiterOptions.PermitLimit = 10; // Permitir 10 peticiones...
limiterOptions.Window = TimeSpan.FromMinutes(1); // ...por cada minuto.
limiterOptions.QueueLimit = 2; // Poner en cola hasta 2 peticiones si se excede el límite brevemente.
limiterOptions.QueueProcessingOrder = QueueProcessingOrder.OldestFirst;
});
// Esta función se ejecuta cuando una petición es rechazada
options.RejectionStatusCode = StatusCodes.Status429TooManyRequests;
});
builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(options =>
{
options.SwaggerDoc("v1", new OpenApiInfo { Title = "Chatbot API", Version = "v1" });
options.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
{
In = ParameterLocation.Header,
Description = "Por favor, introduce 'Bearer' seguido de un espacio y el token JWT",
Name = "Authorization",
Type = SecuritySchemeType.ApiKey,
Scheme = "Bearer"
});
options.AddSecurityRequirement(new OpenApiSecurityRequirement
{
{
new OpenApiSecurityScheme
{
Reference = new OpenApiReference
{
Type = ReferenceType.SecurityScheme,
Id = "Bearer"
}
},
new string[] {}
}
});
});
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
// =========== CONFIGURACIÓN Y USO DEL MIDDLEWARE DE ENCABEZADOS DE SEGURIDAD ===========
app.UseSecurityHeaders(policy =>
{
policy.AddDefaultSecurityHeaders(); // Añade los encabezados por defecto
policy.AddContentSecurityPolicy(builder =>
{
builder.AddDefaultSrc().Self();
// Permisos necesarios para Swagger UI
builder.AddScriptSrc().Self().UnsafeInline();
builder.AddStyleSrc().Self().UnsafeInline();
});
});
app.UseCors(myAllowSpecificOrigins);
app.UseRateLimiter();
app.UseAuthentication();
app.UseAuthorization();
app.MapControllers();
app.Run();