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										 |  |  | # ./proxy/nginx.conf
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										 |  |  | # --- MAPA DE ORÍGENES PERMITIDOS ---
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							|  |  |  | # Este bloque debe estar fuera de los bloques 'server'.
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							|  |  |  | # Comprueba la cabecera 'Origin' de la petición ($http_origin) y, si coincide,
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							|  |  |  | # establece la variable $cors_origin con ese valor. Si no, queda vacía.
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							|  |  |  | map $http_origin $cors_origin { | 
					
						
							|  |  |  |     default ''; | 
					
						
							|  |  |  |     'https://www.eldia.com'        $http_origin; | 
					
						
							|  |  |  |     'https://extras.eldia.com'     $http_origin; | 
					
						
							|  |  |  |     'http://localhost:5173'       $http_origin; # Para desarrollo local
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							|  |  |  |     # Añada aquí cualquier otro dominio de desarrollo si es necesario
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							|  |  |  | } | 
					
						
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										 |  |  | # --- Upstreams (Definiciones de nuestros servicios) ---
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										 |  |  | upstream backend_api { | 
					
						
							|  |  |  |     server elecciones-api:8080; | 
					
						
							|  |  |  | } | 
					
						
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										 |  |  | upstream frontend_public { | 
					
						
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										 |  |  |     server elecciones-frontend:80; | 
					
						
							|  |  |  | } | 
					
						
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										 |  |  | upstream frontend_admin { | 
					
						
							|  |  |  |     server elecciones-frontend-admin:80; | 
					
						
							|  |  |  | } | 
					
						
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										 |  |  | 
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										 |  |  | # --- Servidor para el Frontend Público / Widgets (Puerto 80) ---
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										 |  |  | server { | 
					
						
							|  |  |  |     listen 80; | 
					
						
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										 |  |  |     server_name elecciones2025.eldia.com; | 
					
						
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										 |  |  |     # --- INICIO: MANEJO GLOBAL Y ROBUSTO DE CORS ---
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							|  |  |  |     # Para CUALQUIER petición OPTIONS (preflight), la interceptamos aquí mismo.
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							|  |  |  |     if ($request_method = 'OPTIONS') { | 
					
						
							|  |  |  |         # Añadimos las cabeceras que el navegador espera en una respuesta preflight.
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							|  |  |  |         add_header 'Access-Control-Allow-Origin' $cors_origin always; | 
					
						
							|  |  |  |         add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS' always; | 
					
						
							|  |  |  |         add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always; | 
					
						
							|  |  |  |         # Le decimos al navegador que puede cachear esta respuesta preflight por 24 horas.
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							|  |  |  |         add_header 'Access-Control-Max-Age' 1728000; | 
					
						
							|  |  |  |         add_header 'Content-Type' 'text/plain; charset=utf-8'; | 
					
						
							|  |  |  |         # Respondemos con 204 (No Content) y terminamos la petición.
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							|  |  |  |         # NUNCA se pasará al servicio de frontend.
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							|  |  |  |         return 204; | 
					
						
							|  |  |  |     } | 
					
						
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							|  |  |  |     # Para todas las peticiones que NO son OPTIONS (como GET), añadimos
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							|  |  |  |     # la cabecera de origen para que el navegador las acepte.
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							|  |  |  |     add_header 'Access-Control-Allow-Origin' $cors_origin always; | 
					
						
							|  |  |  |     add_header 'Access-Control-Allow-Credentials' 'true' always; | 
					
						
							|  |  |  |      | 
					
						
							|  |  |  |     # --- FIN: MANEJO GLOBAL DE CORS ---
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							|  |  |  |     # --- El resto de las rutas no cambian ---
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										 |  |  |     location /api/ { | 
					
						
							|  |  |  |         proxy_pass http://backend_api; | 
					
						
							|  |  |  |         proxy_set_header Host $host; | 
					
						
							|  |  |  |         proxy_set_header X-Real-IP $remote_addr; | 
					
						
							|  |  |  |         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; | 
					
						
							|  |  |  |     } | 
					
						
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							|  |  |  |     location / { | 
					
						
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										 |  |  |         # Ya no necesitamos la lógica de CORS aquí dentro.
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										 |  |  |         proxy_pass http://frontend_public; | 
					
						
							|  |  |  |         proxy_set_header Host $host; | 
					
						
							|  |  |  |         proxy_set_header X-Real-IP $remote_addr; | 
					
						
							|  |  |  |         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | } | 
					
						
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							|  |  |  | # --- SERVIDOR para el Frontend de Administración (Puerto 81) ---
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							|  |  |  | server { | 
					
						
							|  |  |  |     listen 81; | 
					
						
							|  |  |  |     server_name _; # Escucha en cualquier hostname que llegue a este puerto
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							|  |  |  |     # --- RUTA PARA LA API ---
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							|  |  |  |     # Es necesario repetir esto para que el panel de admin pueda hablar con la API.
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							|  |  |  |     location /api/ { | 
					
						
							|  |  |  |         proxy_pass http://backend_api; | 
					
						
							|  |  |  |         proxy_set_header Host $host; | 
					
						
							|  |  |  |         proxy_set_header X-Real-IP $remote_addr; | 
					
						
							|  |  |  |         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; | 
					
						
							|  |  |  |     } | 
					
						
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							|  |  |  |     # --- RUTA PARA LA APP DE ADMIN ---
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							|  |  |  |     location / { | 
					
						
							|  |  |  |         proxy_pass http://frontend_admin; | 
					
						
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										 |  |  |         proxy_set_header Host $host; | 
					
						
							|  |  |  |         proxy_set_header X-Real-IP $remote_addr; | 
					
						
							|  |  |  |         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | } |