lambda-middy

Prerequistes

node 14
jq (nice to have)

get started

clone
npm i

test

invoke local

npx serverless invoke local -f hello
{
  "message": "👋"
}

offline dev

npm run start:offline

then

curl -s http://localhost:3001/dev/hello | jq
{
  "message": "👋"
}

curl -s "http://localhost:3001/dev/hello?name=andy" | jq
{
  "message": "Hello!"
}

curl -s "http://localhost:3001/dev/hello?name=error" -i
HTTP/1.1 500 Internal Server Error
access-control-allow-origin: *
x-dns-prefetch-control: off
strict-transport-security: max-age=15552000; includeSubDomains; preload
x-download-options: noopen
x-content-type-options: nosniff
referrer-policy: no-referrer
x-permitted-cross-domain-policies: none
content-type: text/plain; charset=utf-8
cache-control: no-cache
content-length: 16
Date: Wed, 15 Dec 2021 11:35:47 GMT
Connection: keep-alive
Keep-Alive: timeout=5

Unexpected error

deploy

export AWS_ACCESS_KEY_ID=<your id>
export AWS_SECRET_ACCESS_KEY=<your secret>

npm run deploy

cleanup

export AWS_ACCESS_KEY_ID=<your id>
export AWS_SECRET_ACCESS_KEY=<your secret>

npm run remove

notes

without middy

const baseHhandler = async (event) => {
  try {
    console.log(event);
    const { name } = event.queryStringParameters || 'unknown';
    const message = greetings(name);
    const response = {
      statusCode: 200,
      body: JSON.stringify({ message }),
    };
    console.log(response);
    return response;
  } catch (error) {
    console.error(error);
    return {
      statusCode: 500,
      body: JSON.stringify({
        error,
      }),
    };
  }
};

with middy

const { name } = event.queryStringParameters || 'unknown';
  const message = greetings(name);
  return {
    statusCode: 200,
    body: JSON.stringify({ message }),
  };
};

const handler = middy(baseHhandler)
  .use(inputOutputLogger())
  .use(httpErrorHandler());

Contributing

Anyone and everyone is welcome to contribute.

Issues

Find a bug or want to request a new feature? Please let me know by submitting an issue.

Licensing

Licensed under the MIT License

A copy of the license is available in the repository's LICENSE file.

tsamaya/lambda-middy