How does react currently work in nodejs?

Question

Node.js

Hey

proto.sendFile = function (dirname, filename) {
// Контекст this это res
  var filename = filename ? dirname + filename : dirname
  var file = new fs.ReadStream(filename)

  file.on("error", function (err) {
    console.log("Error reading file %s : %s", filename, err)
  })

  this.on("close", function () {
    file.destroy()
  }) 

  file.pipe(this)
}

I don’t have an event closefor the object response, but I need it when the user’s speed is low and the user disconnected when uploading half of the file, and if he disconnects when uploading half of the file, it all hangs in memory.
Or is it already provided by nodejs?
there is an autoclose property in the ReadStream object, maybe it matters?

ReadStream {
  _readableState: 
   ReadableState {
     objectMode: false,
     highWaterMark: 65536,
     buffer: [],
     length: 0,
     pipes: null,
     pipesCount: 0,
     flowing: null,
     ended: false,
     endEmitted: false,
     reading: false,
     sync: true,
     needReadable: false,
     emittedReadable: false,
     readableListening: false,
     defaultEncoding: 'utf8',
     ranOut: false,
     awaitDrain: 0,
     readingMore: false,
     decoder: null,
     encoding: null },
  readable: true,
  domain: null,
  _events: { end: [Function], error: [Function] },
  _eventsCount: 2,
  _maxListeners: undefined,
  path: './config.js',
  fd: null,
  flags: 'r',
  mode: 438,
  start: undefined,
  end: undefined,
  autoClose: true,
  pos: undefined }

Answer 1

Nothing will hang in memory, file.destroy() on this.on("close"... does not need to be called either in case of success or in case of error, after calling pipe everything will happen automatically.