Send audio from Node backend to frontend

Question

I have Node/Express server set up in which several thousand audio files are stored within the src folder. I currently have a route set up that sends JSON data in the response object. I wish to also send an mp3 audio file that can be parsed at the front end and be converted to an audio object. I cannot figure out how to encode the audio file such that it may be sent. I have looked into Blobs (these don't seem to be possible in Node) and converting the binary file into a string that may be sent as part of the response body.

Any ideas as to how this may be possible?

score 3 · Accepted Answer · answered Feb 26 '22 at 19:52

3

You can directly send the audio file with something like:

res.sendFile(__dirname, "/src/audioFile.mp3");

Or you could Base64 encode the audio file for your frontend to parse:

fs.readFile("./src/audioFile.mp3", function(err, result) {
  res.send(result.toString("base64"));
});

answered Feb 26 '22 at 19:52

code

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Thank you, given I am trying to send multiple files in one response, the latter method is ideal – Ben Feb 26 '22 at 21:46
@Ben great! Were you able to work it out? – code Feb 26 '22 at 22:25

Send audio from Node backend to frontend

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