Who worked with the multiparty module?

Question

JavaScript

Hello, I have a problem, for example, I am uploading several files at once

$('#form').on('change', function (e) {
  e.preventDefault()
  var data = new FormData();

  $.each(e.target.files, function (i, file) {
    console.log(file)
     data.append('photo' + i, file)
  })

  console.log(data)
  $.ajax({
    type: "POST",
    url: "/upload",
    data: data,
    processData: false,
    contentType: false,
    cache: false,
    success: function (data) {
      console.log(data)
    },
    error: function (error) {
      console.log(error)
    }
  })
})

On the server, I upload them from multiparty, I find out the size of the files using the property part.byteCount,
and it takes this size from content-lengthand it stores the total length of the files, but how to find out the length of each file?

Answer 1

In the 'part' (part) event handler , this information is not available. It is available either in the 'file' (name, file)
handler

form.on('file', function(name, file) {
  console.log('File name: ' + name);
  console.log('File size: ' + file.size);
});
/*
name - the field name for this file
file - an object with these properties:
  fieldName - same as name - the field name for this file
  originalFilename - the filename that the user reports for the file
  path - the absolute path of the uploaded file on disk
  headers - the HTTP headers that were sent along with this file
  size - size of the file in bytes 
*/

or in the default form.parse(request, [cb])

form.parse(req, function (err, fields, files) {
    for (var name in files) {
        console.log('got file named ' + name + ' with size = ' + files[name]['size']);
    }

    console.log('Upload completed!');
    res.setHeader('text/plain');
    res.end('Received ' + files.length + ' files');
});