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ksgmet-downloader

Lambda function that fetches data from KSG-Met and stores it on an S3 bucket.

Building

To install dependencies run:

npm install

In order to include to dev dependencies:

npm install --saveDev

To build the zip file for Lambda, run one of the following two commands.

If on a POSIX system:

npm run-script build-aws-resource

If on Windows:

npm run-script build-aws-resource-win

For Lambda, a zip containing the following files will be created:

  • index.js
  • the src/ directory
  • node_modules/ directory
  • package.json
  • LICENSE

The zip file will be put into the dest folder.

Running

In order to run manually outside of Lambda run:

node manual_run.js

This above the downloader without the Lambda handler.

Configuration

Configuration is read from environment variables. It can be provide by an .env file placed in the working directory. The following configuration variables are supported:

  • SERVER_URL - base url of the server
  • PL_CSV_PATH - path to the poland CSV directory, prognozy/CSV/poland by default
  • PL_CSV_STEP - step used to the determine the next hour value to pull from, by default 1. Applies to Poland CSV.
  • PL_CSV_FETCH_HOURS - how many hours of Poland CSV data to fetch (maps to directory paths). Default is 40.
  • PL_CSV_ERROR_LIMIT - how many 404 errors to tolerate and retry by going lower. Default is 0. Applies to Poland CSV.
  • EU_LONG_CSV_PATH - path to the Europe long CSV directory, prognozy/CSV/europe_long by default
  • EU_LONG_CSV_STEP - step used to the determine the next hour value to pull from, by default 3. Applies to Europe long CSV.
  • EU_LONG_CSV_FETCH_HOURS - how many hours of Europe long CSV data to fetch (maps to directory paths). Default is 168.
  • EU_LONG_CSV_ERROR_LIMIT - how many 404 errors to tolerate and retry by going lower. Default is 3. Applies to Europe long CSV.
  • PL_CACHE_PATH - path to Poland cache directory. Default is prognozy/CACHE/poland.
  • LOG_LEVEL - Winston logging level, default is info.
  • UPLOAD_TO_S3 - whether to upload data to S3. By default false.
  • LOAD_AWS_CONFIG_FILE: - whether to load aws configuration from .aws-config.json.
  • S3_BUCKET_NAME - the name of the S3 bucket to upload to

Tests

In order to run jasmine unit tests, execute:

npm run-script test