Usage #

The plugin allows user to request an URL to directly send a file to Amazon S3.

Once the file has been uploaded, it has to be validated with upload:validate otherwise the uploaded file is automaticaly removed after a configurable TTL.

This behavior prevent users from filling the S3 bucket with useless files.

Get a Presigned URL #

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// Kuzzle request
{
  "controller": "s3/upload",
  "action": "getUrl",
  "filename": "headcrab.png",
  "uploadDir": "xen"
}

// Kuzzle response
{
  "fileKey": "xen/<uuid>-headcrab.png",
  "uploadUrl": "https://s3.eu-west-3.amazonaws.com/...",
  "fileUrl": "https://s3.eu-west-3.amazonaws.com/...",
  "ttl": 1200000
}

Upload the file to the Presigned URL #

Send a PUT request to the uploadUrl URL with the body set to the file's content and a Content-Type header corresponding to the file mime type.

Validate the file #

Finally, validate the uploaded file. If not validated in a timely manner (the TTL is configurable), the uploaded file is automatically removed.

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// Kuzzle request
{
  "controller": "s3/upload",
  "action": "validate",
  "fileKey": "xen/<uuid>-headcrab.png"
}

Using the SDK Javascript and axios #

You can use the SDK Javascript to interact with the s3 plugin and axios to send the file to S3.

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  // Get a Presigned URL
  const file = document.getElementById('uploadInput').files[0];
  const { result } = await kuzzle.query({
    controller: 's3/upload',
    action: 'getUrl',
    uploadDir: 'xen',
    filename: file.name
  });

  // Upload the file directly to S3
  const axiosOptions = {
    headers: {
      'Content-Type': file.type
    }
  };
  await axios.put(result.uploadUrl, file, axiosOptions);

  // Validate the uploaded file
  await kuzzle.query({
    controller: 's3/upload',
    action: 'validate',
    fileKey: result.fileKey
  });

Full web example #

You can see a full example here: s3-upload-test.html