// 文件下载 将pdf文件转为流的形式，传到前端，实现下载功能
router.get(‘/downloadFile‘,(req,res)=>{
let { id } = req.query;
// var path="public/pdf/5ea56710fb5a2fdad7cabcf3.pdf";
var path=`public/pdf/${id}.pdf`;
var fileStream = fs.createReadStream(path);
res.setHeader(‘Content-type‘, ‘application/octet-stream‘);
// res.setHeader(‘Content-Disposition‘, ‘attachment;filename=1.pdf‘);
res.setHeader(‘Content-Disposition‘, `‘attachment;filename=${id}.pdf‘`);
fileStream.on(‘data‘, function (data) {
res.write(data, ‘binary‘);
});
fileStream.on(‘end‘, function () {
res.end();
console.log(‘The file has been downloaded successfully!‘);
});
})
