When using Lambda@Edge, a function cannot use environment variables.
This CDK Construct uses a Custom Resource to inject a config.json
file with user provided values into an existing function, and
publishes a new version that is ready to be used as part of a
CloudFront Distribution.
Inspired by similar mechanism in https://github.com/aws-samples/cloudfront-authorization-at-edge/
npm install @henrist/cdk-lambda-configUsing the construct:
const originalFunction = lambda.Function.fromFunctionArn(...)
const updatedFunction = new LambdaConfig(this, "UpdatedFunction", {
function: originalFunction,
config: {
Key1: "Some value",
Nested: {
Key2: "Other value",
},
},
nonce: "1", // See TSDoc.
}
// Can now retrieve the new version:
updatedFunction.versionRead from within the handler:
const fs = require("fs")
const path = require("path")
const config = JSON.parse(
fs.readFileSync(path.join(__dirname, "config.json"), "utf-8"),
)
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