NodeJS : upload a file with a speed limit

speed-limit-upload.ts

import { createReadStream } from 'fs'
import { basename }  from 'path'
import * as request from 'request' // npm i request
import * as Throttle from 'throttle' // npm install throttle

const fileToUploadPath = '/foo.txt'
const fileSize = 1024 // Computed with 'fs.stat' for example

request.post(
  '/upload',
  {
    formData: {
      foo: 'bar',
      file: {
        // Create a ReadStream from the file, pipe it to a Throttle transform stream with a limit in bytes per second
        value: createReadStream(fileToUploadPath).pipe(new Throttle(512 * 1024)),
        // Because it's not a pure ReadStream, we have to provide manually the metadata
        // See: https://github.com/request/request#multipartform-data-multipart-form-uploads
        options: {
          filename: basename(fileToUploadPath),
          knownLength: fileSize,
        },
      },
    }
  },
  () => console.log('Upload finished!')
)