feat: Phase 2 — metrics counters, mock Wallarm test server, stats UI, add runtime config to gitignore

cmd/mockwallarm/main.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"time"
+)
+
+// MockWallarm is a test server that simulates a Wallarm node.
+// Usage: go run mock_wallarm.go [--mode=allow|block|slow|flaky]
+//
+// Modes:
+//   allow  — always return "allow" verdict
+//   block  — always return "block" verdict
+//   slow   — delay 5s then allow (tests timeout)
+//   flaky  — succeed 3 times, then fail 3 times (tests circuit breaker)
+
+type Verdict struct {
+	Verdict string `json:"verdict"`
+	Reason  string `json:"reason,omitempty"`
+	Score   int    `json:"score,omitempty"`
+}
+
+var (
+	requestCount int
+	mode         string
+)
+
+func main() {
+	mode = "allow"
+	if len(os.Args) > 1 {
+		mode = os.Args[1]
+	}
+	// Also support --mode=block style
+	if len(mode) > 7 && mode[:7] == "--mode=" {
+		mode = mode[7:]
+	}
+
+	http.HandleFunc("/inspect", handleInspect)
+	http.HandleFunc("/health", handleHealth)
+
+	port := "8085"
+	if p := os.Getenv("PORT"); p != "" {
+		port = p
+	}
+
+	log.Printf("Mock Wallarm node starting on :%s (mode=%s)", port, mode)
+	if err := http.ListenAndServe(":"+port, nil); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func handleInspect(w http.ResponseWriter, r *http.Request) {
+	requestCount++
+
+	switch mode {
+	case "block":
+		writeVerdict(w, "block", "SQL injection detected", 95)
+
+	case "slow":
+		time.Sleep(5 * time.Second)
+		writeVerdict(w, "allow", "clean", 0)
+
+	case "flaky":
+		if requestCount <= 3 {
+			writeVerdict(w, "allow", "clean", 0)
+		} else {
+			// Simulate failure — return 500
+			http.Error(w, "internal error", 500)
+		}
+		if requestCount >= 6 {
+			requestCount = 0 // reset cycle
+		}
+
+	default: // allow
+		writeVerdict(w, "allow", fmt.Sprintf("clean (request #%d)", requestCount), 0)
+	}
+}
+
+func handleHealth(w http.ResponseWriter, r *http.Request) {
+	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
+}
+
+func writeVerdict(w http.ResponseWriter, verdict, reason string, score int) {
+	writeJSON(w, http.StatusOK, Verdict{Verdict: verdict, Reason: reason, Score: score})
+}
+
+func writeJSON(w http.ResponseWriter, status int, v interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	json.NewEncoder(w).Encode(v)
+}

main.go

@@ -116,20 +116,7 @@ func handleSaveConfig(w http.ResponseWriter, r *http.Request) {
 }
 
 func handleGetStats(w http.ResponseWriter, r *http.Request) {
-	state := breaker.State()
-	var stateStr string
-	switch state {
-	case StateClosed:
-		stateStr = "closed"
-	case StateOpen:
-		stateStr = "open"
-	case StateHalfOpen:
-		stateStr = "half-open"
-	}
-	writeJSON(w, http.StatusOK, map[string]interface{}{
-		"circuit":      stateStr,
-		"enabled":      getConfig().Enabled,
-	})
+	writeJSON(w, http.StatusOK, metricsSnapshot())
 }
 
 func handleReturnVerdict(w http.ResponseWriter, r *http.Request) {

middleware.go

@@ -4,27 +4,60 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"sync/atomic"
 
 	"zoraxy-waf/zoraxy_plugin"
 )
 
 var breaker = newCircuitBreaker()
 
+// Metrics counters
+var (
+	requestsTotal    uint64
+	requestsAllowed  uint64
+	requestsBlocked  uint64
+	requestsBypassed uint64 // fail-open or disabled
+)
+
+func metricsSnapshot() map[string]interface{} {
+	return map[string]interface{}{
+		"total":    atomic.LoadUint64(&requestsTotal),
+		"allowed":  atomic.LoadUint64(&requestsAllowed),
+		"blocked":  atomic.LoadUint64(&requestsBlocked),
+		"bypassed": atomic.LoadUint64(&requestsBypassed),
+		"circuit":  circuitStateStr(breaker.State()),
+		"enabled":  getConfig().Enabled,
+	}
+}
+
+func circuitStateStr(s CircuitState) string {
+	switch s {
+	case StateClosed:
+		return "closed"
+	case StateOpen:
+		return "open"
+	case StateHalfOpen:
+		return "half-open"
+	}
+	return "unknown"
+}
+
 // handleInspect is the static capture ingress handler.
 // Zoraxy proxies matching requests here. The plugin decides:
 //   - Return 280 (CAPTURED) → block the request
 //   - Return 284 (UNHANDLED) → forward as normal
 func handleInspect(w http.ResponseWriter, r *http.Request) {
+	atomic.AddUint64(&requestsTotal, 1)
 	cfg := getConfig()
 	if !cfg.Enabled {
-		// WAF disabled — pass through.
+		atomic.AddUint64(&requestsBypassed, 1)
 		w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_UNHANDLED))
 		return
 	}
 
 	state := breaker.State()
 	if state == StateOpen {
-		// Fail-open: Wallarm is down, let traffic through.
+		atomic.AddUint64(&requestsBypassed, 1)
 		log.Printf("WAF: breaker OPEN — fail-open, passing %s %s", r.Method, r.URL.Path)
 		w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_UNHANDLED))
 		return
@@ -32,9 +65,9 @@ func handleInspect(w http.ResponseWriter, r *http.Request) {
 
 	resp, err := inspect(r)
 	if err != nil {
+		atomic.AddUint64(&requestsBypassed, 1)
 		log.Printf("WAF: inspection error: %v", err)
 		breaker.RecordFailure()
-		// Fail-open on error.
 		w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_UNHANDLED))
 		return
 	}
@@ -42,14 +75,14 @@ func handleInspect(w http.ResponseWriter, r *http.Request) {
 	breaker.RecordSuccess()
 
 	if resp.Verdict == "block" {
+		atomic.AddUint64(&requestsBlocked, 1)
 		log.Printf("WAF: BLOCKED %s %s — reason: %s", r.Method, r.URL.Path, resp.Reason)
-		// Return the Zoraxy control code for "captured" (blocked).
 		w.Header().Set("Content-Type", "text/html")
 		w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_CAPTURED))
 		fmt.Fprintf(w, `<html><body><h1>403 Forbidden</h1><p>Request blocked by WAF.</p></body></html>`)
 		return
 	}
 
-	// Allowed — let Zoraxy forward normally.
+	atomic.AddUint64(&requestsAllowed, 1)
 	w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_UNHANDLED))
 }

web/app.js

@@ -16,6 +16,10 @@ function loadStats() {
       (data.circuit === 'open' ? 'warn' : data.circuit === 'closed' ? 'ok' : 'warn'));
     $('#waf-status').text(data.enabled ? 'Active' : 'Disabled').attr('class', 'stat-value ' +
       (data.enabled ? 'ok' : 'off'));
+    $('#stat-total').text(data.total || 0);
+    $('#stat-allowed').text(data.allowed || 0);
+    $('#stat-blocked').text(data.blocked || 0);
+    $('#stat-bypassed').text(data.bypassed || 0);
   });
 }
 

web/index.html

@@ -54,6 +54,22 @@
         <span class="stat-label">WAF Status:</span>
         <span id="waf-status" class="stat-value">--</span>
       </div>
+      <div class="stat-row">
+        <span class="stat-label">Total Inspected:</span>
+        <span id="stat-total" class="stat-value">0</span>
+      </div>
+      <div class="stat-row">
+        <span class="stat-label">Allowed:</span>
+        <span id="stat-allowed" class="stat-value ok">0</span>
+      </div>
+      <div class="stat-row">
+        <span class="stat-label">Blocked:</span>
+        <span id="stat-blocked" class="stat-value warn">0</span>
+      </div>
+      <div class="stat-row">
+        <span class="stat-label">Bypassed (fail-open):</span>
+        <span id="stat-bypassed" class="stat-value">0</span>
+      </div>
     </section>
   </main>