Bash function request handler

A request handler is a script that is run to handle each Bash function call. When creating a function version, you should specify the entry point: the name of a file with an extension (for example, handler.sh).

With the stdin standard input stream, the body of a request in JSON format is passed in the script.

The service information is specified in the script using environment variables:

• REQUEST_ID: ID of the request being handled.
• FUNCTION_NAME: Function ID.
• FUNCTION_VERSION: Function version ID.

When handled, the function returns the contents of the stdout standard output stream in JSON format.

Examples

The following function outputs the request structure and environment variables to both the execution log and function response:

#!/bin/bash
set -e

RESPONSE=$(cat | jq -sc '.[0] // {}' | jq -c '{statusCode:200, body:{env:env, request:.}}')
echo $RESPONSE >&2
echo $RESPONSE | jq -c '.body |= tostring' # make sure 'body' is a string, not a json node