slamdata / quasar-datasource-s3

Quasar connector providing support for Amazon S3 as a data source

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Quasar S3 Datasource

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libraryDependencies += "com.slamdata" %% "quasar-datasource-s3" % <version>


The configuration of the S3 datasource has the following JSON format

  "bucket": String,
  "jsonParsing": "array" | "lineDelimited",
  ["credentials": Object]
  • bucket the URL of the S3 bucket to use, e.g.
  • jsonParsing the format of the resources that are assumed to be in the container. Currently array-wrapped ("array") and line-delimited ("lineDelimited") are supported.
  • credentials (optional, default = empty) S3 credentials to use for access in case the bucket is not public. Object has the following format: { "accessKey": String, "secretKey": String, "region": String }. The credentials section can be omitted completely for public buckets, but for private buckets the section needs to be there with all 3 fields specified.


  "bucket": "",
  "jsonParsing": "array",
  "credentials": {
    "accessKey": "some access key",
    "secretKey": "super secret key",
    "region": "us-east-1"

Running the test suite for secure buckets

You need to decode the base64-encoded credentials.

For GNU base64:

base64 -d testCredentials.json.b64 > testCredentials.json

For BSD (or macOS) base64:

base64 -D -i testCredentials.json.b64 -o testCredentials.json

After this, you should be able to run the SecureS3DatasourceSpec spec