Metadata: create/update/get a dataset description

[kyao]

The metadata API is defined here: https://datamart-upload.readthedocs.io/en/latest/api/
The minimal JSON content for POST /datasets must include properties: name, description and url. Below is a sample JSON:

{
  "name": "World Bank Development Indicators",
  "description": "World Development Indicators (WDI) is the primary World Bank collection of development indicators, compiled from officially recognized international sources.",
  "url": "https://data.worldbank.org/indicator"
}

If the optional datasetID property is included, then the value of datasetID is used as the dataset identifier. Otherwise, a dataset identifier is automatically generated.

The method PUT /datasets/id updates an existing datasets with given JSON content.
The method GET /datasets/id returns the JSON description.