feat: soportar proxy reverso dinamico y actualizar puerto 2006 de produccion

.agente/infraestructura.md

@@ -1342,7 +1342,7 @@ Aplicación web en Go para transferencia inmediata de archivos, fotos, documento
 | Ubicación local | `siax-amd` — `/home/pablinux/Projects/GO/app_compartir` |
 | Servidor de producción | `server-webapps` CT 132 (`192.168.10.160`) — pendiente deploy |
 | Dominio público | `drop.sigmac.app` |
-| Puerto | `8085` |
+| Puerto | `2006` |
 | Servicio systemd | `app-compartir.service` |
 
 **Bases de Datos:**

agents.md

@@ -74,7 +74,7 @@ Goroutine periódica (ticker) que consulta items donde `is_guest = true AND expi
 | Parámetro | Valor |
 |---|---|
 | Dominio público | `drop.sigmac.app` |
-| Puerto interno | `8085` (o configurable vía `PORT`) |
+| Puerto interno | `2006` (producción) / `8085` (local) |
 | Servicio systemd | `app-compartir.service` |
 | BD principal | SQLite local (`data/compartir.db`) |
 | MCP ecosistema | `mcp.telcotronics.net` 🔧 en mantenimiento |

internal/handlers/handlers.go

@@ -70,6 +70,21 @@ type PageData struct {
 	Error         string
 }
 
+func (h *Handlers) getBaseURL(r *http.Request) string {
+	proto := "http"
+	if r.TLS != nil || r.Header.Get("X-Forwarded-Proto") == "https" {
+		proto = "https"
+	}
+	host := r.Host
+	if host == "" {
+		host = r.Header.Get("X-Forwarded-Host")
+	}
+	if host != "" {
+		return fmt.Sprintf("%s://%s", proto, host)
+	}
+	return h.cfg.BaseURL
+}
+
 func (h *Handlers) Index(w http.ResponseWriter, r *http.Request) {
 	if r.URL.Path != "/" {
 		http.NotFound(w, r)
@@ -164,14 +179,15 @@ func (h *Handlers) Upload(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	baseURL := h.getBaseURL(r)
 	resp := map[string]interface{}{
 		"id":           share.ID,
 		"title":        share.Title,
 		"file_size":    share.FileSize,
 		"mime_type":    share.MimeType,
 		"is_guest":     share.IsGuest,
-		"viewer_url":   fmt.Sprintf("%s/v/%s", h.cfg.BaseURL, share.ID),
-		"download_url": fmt.Sprintf("%s/d/%s", h.cfg.BaseURL, share.ID),
+		"viewer_url":   fmt.Sprintf("%s/v/%s", baseURL, share.ID),
+		"download_url": fmt.Sprintf("%s/d/%s", baseURL, share.ID),
 	}
 	if share.IsGuest {
 		resp["expires_in"] = "24 horas"
@@ -258,14 +274,15 @@ func (h *Handlers) ShareText(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	baseURL := h.getBaseURL(r)
 	resp := map[string]interface{}{
 		"id":           share.ID,
 		"title":        share.Title,
 		"file_size":    share.FileSize,
 		"mime_type":    share.MimeType,
 		"is_guest":     share.IsGuest,
-		"viewer_url":   fmt.Sprintf("%s/v/%s", h.cfg.BaseURL, share.ID),
-		"download_url": fmt.Sprintf("%s/d/%s", h.cfg.BaseURL, share.ID),
+		"viewer_url":   fmt.Sprintf("%s/v/%s", baseURL, share.ID),
+		"download_url": fmt.Sprintf("%s/d/%s", baseURL, share.ID),
 	}
 	if share.IsGuest {
 		resp["expires_in"] = "24 horas"
@@ -407,7 +424,8 @@ func (h *Handlers) QR(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	targetURL := fmt.Sprintf("%s/v/%s", h.cfg.BaseURL, id)
+	baseURL := h.getBaseURL(r)
+	targetURL := fmt.Sprintf("%s/v/%s", baseURL, id)
 	pngBytes, err := qrcode.Encode(targetURL, qrcode.Medium, 256)
 	if err != nil {
 		http.Error(w, "Error generando QR", http.StatusInternalServerError)