An aws s3 uploading sample code in Node.js

gist_aws_upload.js

console.log('Arg list below:');
process.argv.forEach((val, index) => {
    console.log(`${index}: ${val}`);
});

function isEmpty(obj) {
    return !Object.keys(obj).length;
}

var args = process.argv.slice(2);
if (isEmpty(args)) {
    console.error('Please give a path for uploading');
    process.exit(0);
}

// ref: https://stackoverflow.com/questions/47535820

function uploadToS3(key, body) {
    var AWS = require('aws-sdk');
    var s3 = new AWS.S3();
    var bucketName = '{PLEASE-REPLACE-THIS-FOR-YOUR-BUCKET-NAME}';
    s3.upload({
        Bucket: bucketName,
        ACL: 'public-read',
        Body: body,
        Key: key,
        ContentType: 'application/octet-stream'
    }, (err, response) => {
        if (err) {
            console.error(err);
        } else {
            console.log('uploading is succeed!', response);
        }
    });
}

var uploadPath = args[0];
var fs = require('fs');
fs.access(uploadPath, fs.F_OK, (err) => {
    if (err) {
        console.error('fail to read from file:', uploadPath, err);
        process.exit(-1);
    } else {
        var path = require('path');
        var uuid = require('node-uuid');
        var keyName = 'upload_' + uuid.v4() + path.extname(uploadPath);
        uploadToS3(keyName, fs.createReadStream(uploadPath));
    }
})