Cannot able to send the downloaded local file to google cloud speech api using Nodejs

I'm Downloading the file using nodejs to local and sending it to the google cloud speech api. But I keep on getting this below error while sending it.

error { Error: No audio content.
at A:\myprojects\twilio-bot\voicecall-bot\node_modules\grpc\src\node\src\cli
ent.js:434:17
code: 3,
metadata: Metadata { _internal_repr: {} },
note: 'Exception occurred in retry method that was not classified as 
transient} 

Here is my Code below, Can somebody help me, I don't know what I'm doing wrong.

PS: The speech api code working fine with already existing local file.

var fs = require('fs');
var request = require("request");

var Audioinput = "./currentaudio.wav";
var Currentdataurl = "https Url of the audio.wav";

//I didn't use this because I'm downloading file over https.

request.get(Currentdataurl)
    .on('error', function(err) {
        console.log(err)
}).pipe(fs.createWriteStream(Audioinput));


speech.recognize(Audioinput, {
    encoding: 'LINEAR16',
    sampleRateHertz: 8000,
    languageCode: "en-IN"
}, function(err, transcript) {
    if(err){
    console.log("error", err);
} else {
    console.log("data1",transcript); 
}});

via Devan