Stream response

[lantica]

Hi folks.
Is there a way to stream the response instead of using send() for large response?

[franciscop]

Thanks for asking! Sure, there are multiple ways, please see this comment:

// Streaming a file:
const { file } = require('server/reply');
const mid = () => file("./path/myfile.mp3");

For arbitrary data:

// Untested, but you might/should be able to stream like this:
const { pipeline } = require('node:stream/promises');
const mid = async (ctx) => {
  ctx.res.setHeader('Content-Type', 'audio/mp3');
  await pipeline(nodeReadStream, ctx.res);
};

// If the above didn't work, this is verified to work:
const mid = (ctx) => {
  ctx.res.setHeader('Content-Type', 'audio/mp3');
  return new Promise((resolve) => {
    nodeReadStream.pipe(ctx.res).on('end', resolve);
  });
};

[lantica]

Thanks!
The pipeline works like a charm.

[franciscop]

Glad to hear! I've been working a lot with pipeline() in other projects and it's amazing :)