@solegaonkar/lambdautils NPM

lambdautils

Handy utility functions for a Lambda Function

AWS Lambda functions invoked from API Gateway Proxy Integration require some common functionality. That is encapsulated in this module.

parseProxyEvent(event)

This method extracts useful details from the event object:

{
    body: JSON.parse(event.body),
    accountId: event?.requestContext?.accountId,
    requestTime: event?.requestContext?.requestTimeEpoch,
    sourceIp: event?.requestContext?.identity?.sourceIp,
    userAgent: event?.requestContext?.identity?.userAgent,
    authorization: auth,
    apiKey: event?.headers["x-api-key"],
}

This also validates any authentication in the Authorization header. If it is a Bearer JWT token, it is verified with the SECRET environment variable. If it is valid, the data of the token is available in the authorization: auth. Else it is ignored.

respond(response)

This takes care of adding the CORS headers to the response, along with stringifying the JSON.

Logging

To enable tracing and logging, we have utility functions error(), warn(), info() and debug(). They will log along with a log type and request id. setLogLevel() can be used to set the level 0-debug 1-info 2-warn 3-error