node.js - nodejs中res.download()的的status code 是200 ok，但响应的都是乱码，求解！

Question

router.use("/download",function (req, res, next) {

res.download('d:/myFile/','模板.xlsx',function (err) {
    if(err){
        res.send(err);
    }else{
        res.send(true);
    }
});

});

后来又返回了以下这个
code:"ENOENT"
errno:-4058
expose:false
path:"E:企业版开通模板.xlsx"
status:404
statusCode:404
syscall:"stat"
res.download()的status code 是200 ok，但返回值都是乱码，这又该咋办呢？

Answer 1

你的路徑是不是有問題，具體的回傳值，要看介面怎麼定義{"code":"EISDIR"}？

express是在服務端運行的程序，具體要下載到那個目錄，是客戶端來決定的，例如：瀏覽器設定預設下載到桌面。

res.download的API如下：
res.download(path, [filename], [fn])
Transfer the file at path as an “attachment”, typically browsers will prompt the user for download. The Content-Distypically Content-Disposition “filename=” parameter, aka the one that will appear in the brower dialog is set to path by default, however you may provide an override filename.

When an error has ocurred or transfer is complete the optional callback fn is invoked. This method uses res.sendfile() to transfer the file.

res.download('/report-12345.pdf');

res.download('/report-12345.pdf', 'report.pdf');

res.download('/report-12345.pdf', 'report.pdf', function(err){
  if (err) {
    // handle error, keep in mind the response may be partially-sent
    // so check res.headerSent
  } else {
    // decrement a download credit etc
  }
});