nodejs createReadStream empty file

Question

I tried this simply code

var fs = require('fs');
var stream = fs.createReadStream(fileName);
stream.on('readable', function () {
   console.log("readable event called");
} );

And I noticed that if the file is an empty, then the event is not called. Is there elegant way to check that the file is empty?

Check the file size using fs.stat()

wf9a5m75
– wf9a5m75

2016-03-10 14:33:12 +00:00
Commented Mar 10, 2016 at 14:33 — wf9a5m75
– wf9a5m75, Commented Mar 10, 2016 at 14:33

Raz Luvaton · Accepted Answer · 2021-04-06 13:01:50Z

2

You can use streamName.on('end', () => {})

let readStream = fs.createReadStream(path/to/file);
let emptyFile = true;

readStream.once('data', chunk => {
  emptyFile = false;
});

readStream.on('end', () => {
  console.log('Stream ended');
  if (emptyFile) {
    console.log('Empty file');
  }
});

edited Apr 6, 2021 at 13:01

Raz Luvaton

3,8904 gold badges27 silver badges50 bronze badges

answered Oct 13, 2019 at 4:41

Ragland Asir

692 silver badges7 bronze badges

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