Is there a way to upload to S3 from a url using node.js?

Question

I found this question, but it doesn't seem to answer my question as I think it's still talking about local files.

I want to take, say, and imgur.com link and upload it to S3 using node. Is knox capable of this or do I need to use something else?

Not sure where to get started.

Answer 1

Building on @Yuri's post, for those who would like to use axios instead of request & ES6 syntax for a more modern approach + added the required Bucket property to params (and it downloads any file, not only images):

const uploadFileToS3 = (url, bucket, key) => {
  return axios.get(url, { responseType: "arraybuffer", responseEncoding: "binary" }).then((response) => {
    const params = {
      ContentType: response.headers["content-type"],
      ContentLength: response.data.length.toString(), // or response.header["content-length"] if available for the type of file downloaded
      Bucket: bucket,
      Body: response.data,
      Key: key,
    };
    return s3.putObject(params).promise();
  });
}

uploadFileToS3(<your_file_url>, <your_s3_path>, <your_s3_bucket>)
   .then(() => console.log("File saved!"))
   .catch(error) => console.log(error));

Answer 2

I’m not using knox but the official AWS SDK for JavaScript in Node.js. I issue a request to a URL with {encoding: null} in order to retrieve the data in buffer which can be passed directly to the Body parameter for s3.putObject(). Here below is an example of putting a remote image in a bucket with aws-sdk and request.

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

AWS.config.loadFromPath('./config.json');
var s3 = new AWS.S3();

function put_from_url(url, bucket, key, callback) {
    request({
        url: url,
        encoding: null
    }, function(err, res, body) {
        if (err)
            return callback(err, res);

        s3.putObject({
            Bucket: bucket,
            Key: key,
            ContentType: res.headers['content-type'],
            ContentLength: res.headers['content-length'],
            Body: body // buffer
        }, callback);
    })
}

put_from_url('http://a0.awsstatic.com/main/images/logos/aws_logo.png', 'your_bucket', 'media/aws_logo.png', function(err, res) {
    if (err)
        throw err;

    console.log('Uploaded data successfully!');
});