javascript - 在 ExpressJS 中向文件路径添加参数

Question

我正在尝试上传引用我的 public/assets 目录中的客户文件夹的特定照片。文件路径应为 public/assets/:id。但是，从我的代码来看，当运行时，文件路径始终返回为 public/assets/undefined。有人对如何解决这个问题有建议吗？这是 express 中的代码。

app.param('id', function (req, res, next, id) {
 console.log(req.params.id);
  next();
  });
app.post('/file-upload', function(req, res) {
  // get the temporary location of the file
 var tmp_path = req.files.thumbnail.path;
  // set where the file should actually exists - in this case it is in the "images" directory
 var target_path = './public/assets/'+req.params.id;
  // move the file from the temporary location to the intended location
 fs.rename(tmp_path, target_path, function(err) {
    if (err) throw err;
    // delete the temporary file, so that the explicitly set temporary upload dir does not get filled with unwanted files
    fs.unlink(tmp_path, function() {
        if (err) throw err;
        res.send('File uploaded to: ' + target_path + ' - ' + req.files.thumbnail.size + ' bytes');
     });
  });
});

Answer 1

在路由中，您没有传递参数，请检查并更改您的路由逻辑，如下所示

app.post('/file-upload/:id', function(req, res) {

 var target_path = './public/assets/'+req.params.id; //or use req.param('id')

  ................

});

发布链接传递给你的第二个部分是你的 ID示例:http://localhost:port/file-upload/123

如果您遇到问题，请使用“使用‘？’将变量作为查询字符串传递”运算符

  app.post('/file-upload', function(req, res) {

     var target_path = './public/assets/'+req.query.id; 

      ................

    });

像这样发布链接示例:http://localhost:port/file-upload?id=123