Avoid the Assertion error?

[5nyper]

At times I would get this error:

assert.js:85
  throw new assert.AssertionError({
  ^
AssertionError: false == true
    at Connection._send (/Users/vikaton/Desktop/speech2text/node_modules/http2/lib/protocol/connection.js:326:9)
    at runCallback (timers.js:651:20)
    at tryOnImmediate (timers.js:624:5)
    at processImmediate [as _immediateCallback] (timers.js:596:5)

when running this function

function post(audioBuffer) {
  return new Promise((resolve, reject) => {
   // some headers and content
  let req = require('http2').request(options, function(res) {
      console.log("CALLBACK HAS BEEN CALLED BACK")
      console.log(res.statusCode)
      if (res.statusCode > 204) {
          console.log("ERR with return code " + res.statusCode)
          req.end('', function(){
            console.log('ended request cause of bad code')
          })
          reject('BAD CODE')
      }
      else if (res.statusCode == 204) {
        in_session = false
        player.play('204.mp3', function(err) {
          if (err) throw err
        })
        reject('NO REPSONSE') . // usually this doesnt fire cause I get The assertion error here
      }
  		streamToBuffer(res, function(err, buffer) {
  			console.log('response', buffer.length);
  			if (err) {
  				console.error('error', err);
  				return false;
  			}

  			let parsedMessage = httpParser(buffer);
  			var multipart = parsedMessage.multipart;

  			if (Array.isArray(multipart)) {
  				multipart.forEach(function(part) {
  					//console.log(part)
  					var headers = part.headers;
  					var bodyBuffer = part.body;
  					var contentType = _.get(headers, 'Content-Type');

  					if (bodyBuffer) {
  						if (contentType === 'application/octet-stream') {
  							fs.writeFileSync('audio.mp3', bodyBuffer)
  							player.play('audio.mp3', function(err) {
  								if (err) throw err
                  in_session = false
                  resolve('SUCCESS')
  							})
  						} else if (contentType === 'application/json') {
  							var body = JSON.parse(bodyBuffer.toString('utf8'));
  							console.log(body) //bookmark
  						}
  					}
  				});
  			}
  		});

  		req.on('error', function(e) {
  			console.log('problem with request: ' + e.message);
  		});
      req.setTimeout(5000, function(){
        in_session = false
        console.log('timed out')
      })
  	});
    console.log('REQ IS ' + req)
  	if (isStream(audioBuffer)) {
  		streamToBuffer(audioBuffer, function(error, buffer) {
  			if (error) {
  				console.error(error);
  				return false;
  			}
  			sendRequest(buffer); //check before this
  		});
  	} else if (isBuffer(audioBuffer)) {
  		sendRequest(audioBuffer);
  	} else {
  		console.error('Audio buffer invalid');
  	}

  	function sendRequest(audBuffer) {
      console.log('should sent data')
  		req.write(postDataStart);
  		console.log(postDataStart)
  		req.write(audBuffer);
  		console.log(audBuffer)
  		req.write(postDataEnd);
  		console.log(postDataEnd)
  		req.end(null, function(){
        console.log('ended request and sent data')
      })
  	}
  })
}

My question is, what is the underlying cause for this error in the code (if its even the code thats the problem) and how can I avoid it?

[5nyper]

Apologies for the horrible formatting :/

[zaknuces]

#239