feat: Add Cloudflare token verification endpoint

Add /api/v1/cloudflare/verify, /api/v1/cloudflare/zone endpoints
so the Central UI's Cloudflare page can verify tokens and manage
zone configuration. This was a missing endpoint from the extraction.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/api/v1/handlers.go

@@ -212,6 +212,11 @@ func (api *API) RegisterRoutes(r *mux.Router) {
 	r.HandleFunc("/api/v1/crowdsec/bouncers", api.CrowdSecGetBouncers).Methods("GET")
 	r.HandleFunc("/api/v1/crowdsec/bouncers/{name}", api.CrowdSecDeleteBouncer).Methods("DELETE")
 
+	// Cloudflare management
+	r.HandleFunc("/api/v1/cloudflare/verify", api.CloudflareVerify).Methods("GET")
+	r.HandleFunc("/api/v1/cloudflare/zone", api.CloudflareGetZoneID).Methods("GET")
+	r.HandleFunc("/api/v1/cloudflare/zone", api.CloudflareSetZoneID).Methods("POST")
+
 	// Service registration
 	r.HandleFunc("/api/v1/services", api.ServicesListAll).Methods("GET")
 	r.HandleFunc("/api/v1/services", api.ServicesRegister).Methods("POST")

internal/api/v1/handlers_cloudflare.go

@@ -0,0 +1,129 @@
+package v1
+
+import (
+	"encoding/json"
+	"net/http"
+	"path/filepath"
+)
+
+type cloudflareZone struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}
+
+type cloudflareVerifyResponse struct {
+	TokenConfigured bool             `json:"tokenConfigured"`
+	TokenValid      bool             `json:"tokenValid"`
+	TokenStatus     string           `json:"tokenStatus"`
+	Zones           []cloudflareZone `json:"zones"`
+	Error           string           `json:"error,omitempty"`
+}
+
+// CloudflareVerify checks whether the stored Cloudflare API token is valid
+// and returns the zones it can access.
+func (api *API) CloudflareVerify(w http.ResponseWriter, r *http.Request) {
+	token := api.getCloudflareToken()
+	if token == "" {
+		respondJSON(w, http.StatusOK, cloudflareVerifyResponse{
+			TokenConfigured: false,
+		})
+		return
+	}
+
+	resp := cloudflareVerifyResponse{TokenConfigured: true}
+
+	tokenStatus, err := verifyCloudflareToken(token)
+	if err != nil {
+		resp.Error = err.Error()
+		respondJSON(w, http.StatusOK, resp)
+		return
+	}
+	resp.TokenStatus = tokenStatus
+	resp.TokenValid = tokenStatus == "active"
+
+	zones, err := listCloudflareZones(token)
+	if err != nil {
+		resp.Error = "Token valid but failed to list zones: " + err.Error()
+		respondJSON(w, http.StatusOK, resp)
+		return
+	}
+	resp.Zones = zones
+
+	respondJSON(w, http.StatusOK, resp)
+}
+
+// CloudflareGetZoneID returns the stored zone ID from secrets.
+func (api *API) CloudflareGetZoneID(w http.ResponseWriter, r *http.Request) {
+	zoneID := api.getCloudflareZoneID()
+	respondJSON(w, http.StatusOK, map[string]any{
+		"zoneId":     zoneID,
+		"configured": zoneID != "",
+	})
+}
+
+// CloudflareSetZoneID stores the zone ID in global secrets.
+func (api *API) CloudflareSetZoneID(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		ZoneID string `json:"zoneId"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		respondError(w, http.StatusBadRequest, "Invalid request body")
+		return
+	}
+
+	secretsPath := filepath.Join(api.dataDir, "secrets.yaml")
+	if err := api.secrets.SetSecret(secretsPath, "cloudflare.zoneId", req.ZoneID); err != nil {
+		respondError(w, http.StatusInternalServerError, "Failed to save zone ID")
+		return
+	}
+
+	respondMessage(w, http.StatusOK, "Zone ID saved")
+}
+
+func verifyCloudflareToken(apiToken string) (string, error) {
+	req, err := http.NewRequest(http.MethodGet,
+		"https://api.cloudflare.com/client/v4/user/tokens/verify", nil)
+	if err != nil {
+		return "", err
+	}
+	req.Header.Set("Authorization", "Bearer "+apiToken)
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	var result struct {
+		Result struct {
+			Status string `json:"status"`
+		} `json:"result"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return "", err
+	}
+	return result.Result.Status, nil
+}
+
+func listCloudflareZones(apiToken string) ([]cloudflareZone, error) {
+	req, err := http.NewRequest(http.MethodGet,
+		"https://api.cloudflare.com/client/v4/zones", nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Authorization", "Bearer "+apiToken)
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var result struct {
+		Result []cloudflareZone `json:"result"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return nil, err
+	}
+	return result.Result, nil
+}