fix: 截断不完整的蓝牙设备名称的UTF8编码内容

src/utils/jensen.js

@@ -603,6 +603,56 @@ function Jensen(log, conn) {
   this.registerHandler = function (cmdid, handler) {
     handlers[cmdid] = handler;
   };
+
+  this.truncateIncompleteUtf8 = function(uint8arr) {
+    const bytes = uint8arr;
+    let end = bytes.length;
+
+    // 从后面向前，看多少个 continuation bytes (0b10xxxxxx)
+    let continuationBytes = 0;
+
+    // 向前扫描最多 3 个字节（UTF-8 最长是 4 字节字符）
+    for (let i = bytes.length - 1; i >= Math.max(0, bytes.length - 4); i--) {
+      const byte = bytes[i];
+      if ((byte & 0b1100_0000) === 0b1000_0000) {
+        // 是 continuation byte
+        continuationBytes++;
+        continue;
+      } else {
+        // 遇到一个不是 continuation byte 的字节
+        const lead = byte;
+        let expectedLength = 1;
+        if ((lead & 0b1111_1000) === 0b1111_0000) {
+          expectedLength = 4;
+        } else if ((lead & 0b1111_0000) === 0b1110_0000) {
+          expectedLength = 3;
+        } else if ((lead & 0b1110_0000) === 0b1100_0000) {
+          expectedLength = 2;
+        } else if ((lead & 0b1000_0000) === 0) {
+          expectedLength = 1;
+        } else {
+          // 无效 lead byte，可以认为不完整
+          expectedLength = continuationBytes + 1;
+        }
+
+        // 如果从这个 lead 到末尾的字节数 < 期待长度，说明不完整
+        const actualLength = (bytes.length - 1 - i) + 1; // 包括 lead 自己
+        if (actualLength < expectedLength) {
+          // 截断到 lead 字节之前
+          end = i;
+        }
+        break;
+      }
+    }
+
+    if (end < bytes.length) {
+      // 返回截断后的子数组
+      return bytes.subarray(0, end);
+    } else {
+      // 整体是完整的
+      return bytes;
+    }
+  }
 }
 
 function Command(id) {
@@ -1518,7 +1568,7 @@ Jensen.registerHandler(BLUETOOTH_SCAN, (msg) => {
       mac.push(m.length == 1 ? '0' + m : m);
     }
     devices.push({
-      name: decoder.decode(sname),
+      name: decoder.decode(this.truncateIncompleteUtf8(sname)),
       mac: mac.join('-')
     });
   }
@@ -1543,7 +1593,7 @@ Jensen.registerHandler(BT_GET_PAIRED_DEV_LIST, (msg) => {
     }
     let seq = msg.body[k++] & 0xff;
     devices.push({
-      name: decoder.decode(sname),
+      name: decoder.decode(this.truncateIncompleteUtf8(sname)),
       mac: mac.join('-'),
       sequence: seq
     });
@@ -1572,7 +1622,7 @@ Jensen.registerHandler(BLUETOOTH_STATUS, (msg) => {
   return {
     status: 'connected',
     mac: mac.join('-'),
-    name: decoder.decode(sname),
+    name: decoder.decode(this.truncateIncompleteUtf8(sname)),
     a2dp: (msg.body[i++] & 0xff) == 1,
     hfp: (msg.body[i++] & 0xff) == 1,
     avrcp: (msg.body[i++] & 0xff) == 1,
@@ -1637,7 +1687,7 @@ Jensen.registerHandler(BT_DEV_LIST, (msg) => {
     let rssi = msg.body[k++] & 0xff;
     let cod = ((msg.body[k++] & 0xff) << 16) | ((msg.body[k++] & 0xff) << 8) | (msg.body[k++] & 0xff);
     devices.push({
-      name: decoder.decode(sname),
+      name: decoder.decode(this.truncateIncompleteUtf8(sname)),
       mac: mac.join('-'),
       rssi: rssi,
       cod: cod