上傳壓縮包檔名為【A你你】，node後端獲取到檔名變成了【A浣犱綘】。歡迎大神留言指導。
前端檔案上傳的post請求資訊如下：

伺服器端程式碼如下：
採用iconv嘗試了多種編碼和解碼方法，還是沒能正確還原字串。對照了utf-8漢字編碼是正確的，解碼結果不正確。

 			var  buf = new Buffer( file.name.split('.')[0], 'UTF-8');  
            // console.log(buf.toString('UTF-8'));         
            console.log(buf);
            buf = iconv.decode(buf,'UTF-8');           
            console.log(buf);
            // var temp = iconv.decode(buf,'utf-8');
            console.log("gbkBytes======================="); 
            var gbkBytes = iconv.encode(file.name.split('.')[0],'gbk');            
            console.log(gbkBytes);
            gbkBytes = iconv.decode(gbkBytes,'gbk');
            console.log(gbkBytes);  
            console.log("binary=======================");            
            var binary = iconv.encode(file.name.split('.')[0],'binary');  
            console.log(binary);     
            binary =  iconv.decode(binary,'UTF-8');
            console.log(binary);          
            console.log("end======================="); 
 

後臺輸出如下

utf-8編碼=======================
<Buffer 41 e4 bd a0 e4 bd a0>
QeS9oOS9oA==
gbk編碼=======================
<Buffer 41 c4 e3 c4 e3>
A浣犱綘
binary編碼=======================
<Buffer 41 60 60>
A``
end=======================

具體檔案資訊如下：

File {
  domain: null,
  _events: {},
  _eventsCount: 0,
  _maxListeners: undefined,
  size: 160462,
  path: '/tmp/upload_c4ec9eb09f55db9e6d2efce19760e034',
  name: 'A浣犱綘.rar',
  type: 'application/octet-stream',
  hash: null,
  lastModifiedDate: 2019-01-04T02:09:54.482Z,
  _writeStream: 
   WriteStream {
     _writableState: 
      WritableState {
        objectMode: false,
        highWaterMark: 16384,
        finalCalled: false,
        needDrain: false,
        ending: true,
        ended: true,
        finished: true,
        destroyed: false,
        decodeStrings: true,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        corked: 0,
        sync: false,
        bufferProcessing: false,
        onwrite: [Function: bound onwrite],
        writecb: null,
        writelen: 0,
        bufferedRequest: null,
        lastBufferedRequest: null,
        pendingcb: 0,
        prefinished: true,
        errorEmitted: false,
        bufferedRequestCount: 0,
        corkedRequestsFree: [Object] },
     writable: false,
     domain: null,
     _events: {},
     _eventsCount: 0,
     _maxListeners: undefined,
     path: '/tmp/upload_c4ec9eb09f55db9e6d2efce19760e034',
     fd: null,
     flags: 'w',
     mode: 438,
     start: undefined,
     autoClose: true,
     pos: undefined,
     bytesWritten: 160462,
     closed: true } }