Upload files from react to s3

route.js

var aws = require('aws-sdk');

aws.config.update({
    region: 'us-east-1',
    accessKeyId: process.env.AWSAccessKeyId,
    secretAccessKey: process.env.AWSSecretKey
})

const S3_BUCKET = process.env.bucket

router.post("/api/uploadavatar", async (req, res) => {

    const s3 = new aws.S3();
    const fileName = req.body.fileName;
    const fileType = req.body.fileType;

    const s3Params = {
        Bucket: S3_BUCKET,
        Key: fileName,
        Expires: 500,
        ContentType: fileType,
        ACL: 'public-read'
    };

    s3.getSignedUrl('putObject', s3Params, (err, data) => {
        
        if (err) {
            console.log(err);
            res.json({ success: false, error: err })
        }

        const returnData = {
            signedRequest: data,
            url: `https://${S3_BUCKET}.s3.amazonaws.com/${fileName}`
        };

        res.json({ success: true, data: { returnData } });

    });

});

upload.jsx

// Function
const [success, setSuccess] = useState(false);
    const [url, setUrl] = useState(null);

    const uploadInput = useRef();

    let uploadFile = async (e) => {
        setSuccess(false)
        e.preventDefault();

        let file = uploadInput.current.files[0];

        let fileParts = uploadInput.current.files[0].name.split('.');
        let fileName = shortid.generate() + "_" + fileParts[0];
        let fileType = fileParts[1];

        await axios.post("http://localhost:5000/api/uploadavatar", {
            fileName,
            fileType
        }).then(async res => {
            let data = res.data.data.returnData;
            let signedRequest = data.signedRequest
            setUrl(data.url)
            let options = {
                headers: {
                    'Content-Type': fileType
                }
            };
            await axios.put(signedRequest, file, options)
            .then(res => {
                console.log('archivo subido correctamente')
                setSuccess(true)
            }).catch(err => {
                console.log('error al put archivo ', err)
            })
        })

    }