fix: code review — XSS, credentials 0600, interval leak, path bugs, title, unused imports

api.go

@@ -90,6 +90,8 @@ func (s *Server) handleConfig(w http.ResponseWriter, r *http.Request) {
 		jsonResponse(w, http.StatusOK, APIResponse{Success: true, Data: safe})
 
 	case http.MethodPost:
+		s.mu.Lock()
+		defer s.mu.Unlock()
 		var newCfg Config
 		if err := json.NewDecoder(r.Body).Decode(&newCfg); err != nil {
 			jsonResponse(w, http.StatusBadRequest, APIResponse{Error: "invalid JSON: " + err.Error()})
@@ -135,7 +137,7 @@ func (s *Server) handleStream(w http.ResponseWriter, r *http.Request) {
 
 	go2rtcURL := "http://127.0.0.1:1984/api/stream.mjpeg?src=" + camID + "_" + streamType
 
-	resp, err := http.Get(go2rtcURL)
+	resp, err := httpClient.Get(go2rtcURL)
 	if err != nil {
 		http.Error(w, "stream unavailable", http.StatusServiceUnavailable)
 		return
@@ -363,7 +365,7 @@ func (s *Server) handleRecordings(w http.ResponseWriter, r *http.Request) {
 		snapName := strings.Replace(name, "rec_", "snap_", 1)
 		snapName = strings.Replace(snapName, ".mp4", ".jpg", 1)
 		snapPath := camDir + "/" + snapName
-		if _, err := os.Stat(recDir + "/" + snapName); err == nil {
+		if _, err := os.Stat(scanDir + "/" + snapName); err == nil {
 			clip.Snap = snapPath
 		}
 
@@ -381,7 +383,12 @@ func (s *Server) handleRecordings(w http.ResponseWriter, r *http.Request) {
 			}
 		}
 
-		clips = append([]Clip{clip}, clips...) // newest first
+		clips = append(clips, clip)
+	}
+
+	// Reverse — newest first.
+	for i, j := 0, len(clips)-1; i < j; i, j = i+1, j-1 {
+		clips[i], clips[j] = clips[j], clips[i]
 	}
 
 	jsonResponse(w, http.StatusOK, APIResponse{Success: true, Data: clips})

config.go

@@ -125,7 +125,7 @@ func SaveConfig(cfg Config, path string) error {
 	header := []byte("# NextNVR Configuration\n# Generated by NextNVR setup\n\n")
 	out := append(header, data...)
 
-	if err := os.WriteFile(path, out, 0644); err != nil {
+	if err := os.WriteFile(path, out, 0600); err != nil {
 		return fmt.Errorf("writing config: %w", err)
 	}
 	return nil

go2rtc.go

@@ -68,7 +68,9 @@ func (g *Go2RTCManager) Stop() {
 	if g.cmd != nil && g.cmd.Process != nil {
 		log.Println("go2rtc: stopping...")
 		g.cmd.Process.Signal(os.Interrupt)
+		g.mu.Unlock()
 		time.Sleep(2 * time.Second)
+		g.mu.Lock()
 		g.cmd.Process.Kill()
 		g.running = false
 		log.Println("go2rtc: stopped")
@@ -139,5 +141,5 @@ func (g *Go2RTCManager) writeConfig(cameras []CameraConfig) error {
 		sb.WriteString(fmt.Sprintf("  %s_main: %s\n", cam.ID, mainURL))
 	}
 
-	return os.WriteFile("go2rtc.yaml", []byte(sb.String()), 0644)
+	return os.WriteFile("go2rtc.yaml", []byte(sb.String()), 0600)
 }

onvif.go

@@ -10,7 +10,6 @@ package main
 
 import (
 	"bytes"
-	"encoding/xml"
 	"fmt"
 	"io"
 	"net"
@@ -238,6 +237,3 @@ func buildRTSPURLs(ip, user, pass, manufacturer string) (string, string) {
 
 	return replacer.Replace(patterns.main), replacer.Replace(patterns.sub)
 }
-
-// suppress unused import warning for encoding/xml.
-var _ = xml.Unmarshal

public/app.js

@@ -61,8 +61,12 @@ async function loadCameras() {
 }
 
 // ── Live Grid ──
+let gridRefreshTimer = null;
+
 function renderLiveGrid() {
     const grid = document.getElementById('grid');
+    // Clear previous refresh timer.
+    if (gridRefreshTimer) { clearInterval(gridRefreshTimer); gridRefreshTimer = null; }
     grid.innerHTML = '';
     for (let i = 0; i < 8; i++) {
         const cam = cameras[i];
@@ -80,16 +84,23 @@ function renderLiveGrid() {
                 <span class="tile-status online"></span>
                 <span class="tile-label">${cam.name}</span>
             `;
-            setInterval(() => {
-                const img = tile.querySelector('img');
-                if (img) img.src = `/recordings/${cam.name || cam.id}/latest.jpg?t=${Date.now()}`;
-            }, 3000);
             tile.addEventListener('click', () => openFocus(cam));
         } else {
             tile.innerHTML = '<span class="tile-placeholder">No Camera</span>';
         }
         grid.appendChild(tile);
     }
+
+    // Single global refresh timer — avoids interval leak.
+    gridRefreshTimer = setInterval(() => {
+        grid.querySelectorAll('.grid-tile:not(.offline) img.grid-snap').forEach(img => {
+            const camId = img.closest('.grid-tile').dataset.camId;
+            if (camId) {
+                const cam = cameras.find(c => c.id === camId);
+                if (cam) img.src = `/recordings/${cam.name || cam.id}/latest.jpg?t=${Date.now()}`;
+            }
+        });
+    }, 3000);
 }
 
 // ── Focus Overlay ──
@@ -153,16 +164,36 @@ async function loadClips() {
 }
 function renderClips(clips) {
     const grid = document.getElementById('pb-clips');
-    if (clips.length === 0) { grid.innerHTML = '<p style="color:var(--text-muted);grid-column:1/-1">No recordings found for this selection.</p>'; return; }
-    grid.innerHTML = clips.map(c => `
-        <div class="clip-card" onclick="playClip('${c.path}')">
-            <img src="${c.snap || ''}" class="clip-thumb" loading="lazy"
-                 onerror="this.style.display='none'" alt="${c.time}">
-            <div>${c.live ? '🔴 ' : '🎬 '}${c.time}</div>
-            <div class="clip-time">${c.name}</div>
-            <div class="clip-size">${formatSize(c.size)}</div>
-        </div>
-    `).join('');
+    grid.innerHTML = '';
+    if (clips.length === 0) {
+        grid.innerHTML = '<p style="color:var(--text-muted);grid-column:1/-1">No recordings found for this selection.</p>';
+        return;
+    }
+    clips.forEach(c => {
+        const card = document.createElement('div');
+        card.className = 'clip-card';
+        card.addEventListener('click', () => playClip(c.path));
+        if (c.snap) {
+            const thumb = document.createElement('img');
+            thumb.className = 'clip-thumb';
+            thumb.src = c.snap;
+            thumb.loading = 'lazy';
+            thumb.onerror = () => { thumb.style.display = 'none'; };
+            card.appendChild(thumb);
+        }
+        const timeDiv = document.createElement('div');
+        timeDiv.textContent = (c.live ? '🔴 ' : '🎬 ') + c.time;
+        card.appendChild(timeDiv);
+        const nameDiv = document.createElement('div');
+        nameDiv.className = 'clip-time';
+        nameDiv.textContent = c.name;
+        card.appendChild(nameDiv);
+        const sizeDiv = document.createElement('div');
+        sizeDiv.className = 'clip-size';
+        sizeDiv.textContent = formatSize(c.size);
+        card.appendChild(sizeDiv);
+        grid.appendChild(card);
+    });
 }
 function playClip(path) {
     document.getElementById('pb-player').classList.remove('hidden');

public/index.html

@@ -3,7 +3,7 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>NextNVR — Casa Alba Mindelo</title>
+    <title>NextNVR</title>
     <link rel="stylesheet" href="/style.css">
 </head>
 <body>

recorder.go

@@ -85,7 +85,7 @@ func (rm *RecorderManager) startRecorder(cam CameraConfig) {
 			cam.Username, cam.Password, cam.IP)
 	}
 
-	log.Printf("recorder: starting %s → %s", cam.ID, rtspURL)
+	log.Printf("recorder: starting %s", cam.ID)
 
 	rm.mu.Lock()
 	proc := &recorderProcess{

server.go

@@ -11,6 +11,7 @@ import (
 	"net/http/httputil"
 	"net/url"
 	"strings"
+	"sync"
 )
 
 //go:embed public/*
@@ -22,6 +23,7 @@ type Server struct {
 	http      *http.Server
 	mux       *http.ServeMux
 	appConfig *Config // mutable config reference for hot-reload
+	mu        sync.RWMutex
 }
 
 // NewServer creates and configures the HTTP server.