torrey-playground-lambda

The Lambda function that powers the Torrey Playground.

Testing the Lambda function locally

Prerequisite

In order to invoke the Lambda function locally for testing purposes, the AWS Lambda Runtime Emulator must be installed. To install the emulator, from within the lambda/ directory, run:

curl -Lo ./aws-lambda-rie \
	https://github.com/aws/aws-lambda-runtime-interface-emulator/releases/latest/download/aws-lambda-rie \
	&& chmod +x ./aws-lambda-rie

Once the emulator is installed, continue on with the following instructions to invoke the Lambda function.

Invoking the Lambda function

From within the lambda/ directory:

1. Build the Docker image using the current directory as the build context:

docker build -t matthewkosloski/torrey-playground-lambda .

2. Start up a container named test1, mapping guest port 8080 to host port 9000:

This will run the container in an interactive mode. Any console.log statements in the handler code will show up in this window.

docker run --name test1 -p 9000:8080 matthewkosloski/torrey-playground-lambda:latest

3. Within a new terminal window, post data to the Lambda function using cURL:

curl --location --request POST 'http://localhost:9000/2015-03-31/functions/function/invocations' \
--header 'Content-Type: application/json' \
--data-raw '{
  "program": "(println (* 2 (+ 5 6)))",
  "options": {
    "semanticVersion": "3.0.2",
    "flags": []
  }
}'

4. Observe the output from the Lambda function:

{
  "statusCode": 200,
  "headers": {
    "Content-Type": "application/json"
  },
  "body": "{\"stdout\":\"22\\n\",\"stderr\":\"\"}"
}