增加安全机制

mvcar/js/script.js

@@ -7,6 +7,10 @@ document.addEventListener('DOMContentLoaded', function() {
     let carDatabase = [];
     let isDataLoaded = false;
     
+    // 添加搜索频率限制
+    let lastSearchTime = 0;
+    const SEARCH_DELAY = 1000; // 1秒内只能搜索一次
+
     // 加载车辆数据
     fetch('js/cars.json')
         .then(response => response.json())
@@ -22,6 +26,20 @@ document.addEventListener('DOMContentLoaded', function() {
     searchButton.addEventListener('click', function() {
         const plate = licensePlateInput.value.trim();
         
+        // 检查输入长度
+        if (plate.length < 3) {
+            showError('请输入至少3个字符进行搜索');
+            return;
+        }
+        
+        // 检查搜索频率
+        const currentTime = new Date().getTime();
+        if (currentTime - lastSearchTime < SEARCH_DELAY) {
+            showError('搜索过于频繁，请稍后再试');
+            return;
+        }
+        lastSearchTime = currentTime;
+
         if (!plate) {
             showError('请输入车牌号码');
             return;
@@ -33,11 +51,17 @@ document.addEventListener('DOMContentLoaded', function() {
             return;
         }
 
-        // 在数据库中查找车牌（支持模糊匹配，忽略大小写）
-        //const carInfo = carDatabase.find(car => car.plate.includes(plate));
-        const carInfo = carDatabase.find(car => 
-            car.plate.toLowerCase().includes(plate.toLowerCase())
-        );
+        // 改进的模糊匹配逻辑 - 要求至少3个连续字符匹配
+        const carInfo = carDatabase.find(car => {
+            const lowerPlate = car.plate.toLowerCase();
+            const searchPlate = plate.toLowerCase();
+            
+            // 只有当搜索词长度>=3且能找到连续匹配时才返回true
+            if (searchPlate.length >= 3) {
+                return lowerPlate.includes(searchPlate);
+            }
+            return false;
+        });
         
         if (carInfo) {
             // 将车辆信息存储到 sessionStorage