如何使用节点将WAV文件从AWS Lambda中的/tmp文件夹上载到S3。js公司

我已经成功地创建了一个AWS Lambda函数来使用sox处理一些音频,并将结果存储到/tmp文件夹中。我想将结果文件上载到S3。我尝试了多种方法,但都没有成功。以下是我的功能:

const lambdaAudio = require('lambda-audio')
const fs = require('fs')

exports.handler = function(event, context) {

  lambdaAudio.sox('./input.mp3 -c 1 /tmp/output.wav')
    .then(response => {
        if (fs.existsSync('/tmp/output.wav')) {
              console.log('output.wav file exists.')  // This works!

              // UPLOAD TO S3 HERE  HOW???

        }            
    })
    .catch(errorResponse => {
      console.log('Error from the sox command:', errorResponse)
    })
}

更新时间: 以下是我的最终工作版本,其中包含了dpwrussell的答案:

var lambdaAudio = require('lambda-audio')
var fs = require('fs')
var AWS = require('aws-sdk');

var accessKeyId =  "xxxxxxxxxxxxxxxxxxxxx";
var secretAccessKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

AWS.config.update({
  accessKeyId: accessKeyId,
  secretAccessKey: secretAccessKey
});

exports.handler = function(event, context) {

  lambdaAudio.sox('./input.mp3 -c 1 /tmp/output.wav')
    .then(response => {
        if (fs.existsSync('/tmp/output.wav')) {
              console.log('output.wav file exists.')  

              uploadToS3();

        }            
    })
    .catch(errorResponse => {
      console.log('Error from the sox command:', errorResponse)
    })
}

function uploadToS3() {
  fs.readFile('/tmp/output.wav', function (err, data) {
    if (err) { throw err; }

    var base64data = new Buffer(data, 'binary');

    var s3 = new AWS.S3();
    s3.putObject({
      Bucket: 'my-bucket',
      Key: 'output.wav',
      Body: base64data
    },function (resp) {
      console.log('Done');
    });

  });
}