Serverless Cloudwatch events appearing encrypted / serialized

Serverless Framework
1

I’m testing out Cloudwatch logs as a trigger for serverless functions. However when my serverless function is triggered, it’s just outputting jibberish, which I figured was some form of encryption. Unfortunately I don’t know what that encryption is.

Here’s the output:

{"awslogs":{"data":"H4sIAAAAAAAAAGVRX2sjIRz8KovPa/Gn679AHtK7JATatJDAPRylmFVSqVkXNSlL6XevSbmnA59mxhln/EQnl7M5uv00OjRDvxf7xevjcrdbrJeoRfFjcKnCShIlNJdUMVrhEI/rFM9jZcxgwlR8n1/dxQ0l/7C7kpw5VXqLn7bOh5Dxo+nvY3zHzynehdibgLXinCpOMLHigAkwhR11FksCSiulwNpDtcvnQ+6TH4uPw8qH4lJGs7/IGh+m0Uw4u3RxKdQa2LoL/hXi2X6Y0r8tbw96iMe8+8/ipvpzVVUe8IotHpbdhsJ6c49ebhV+btekT+RtbcI4qE4STVgHwDqliRYSuGCEXhnCuCCaMQFXoaBUCqk6oKo2KL6OXMyp7gVcSsmEBs01tP/Gr/aUgMZAMSMN8Nn16AYTTkgzejtXDHjblLe6qp3LmtVRraGiirRNrssnX6b5Zrt6apt9zfLDsTFDc/sS9PXy9Q34BmF05wEAAA=="}}

And here’s the function’s code:

const handler = async (event) => {
  console.log('*********RECEIVED EVENT FROM CLOUDWATCH**********')
  console.log(JSON.stringify(event));
  return {
    statusCode: 200,
    body: JSON.stringify(
      event,
      null,
      2
    )
  }
};

export { handler };
2

It looks like the data is base64 encoded. Have you tried decoding it?

3

Yeah that turned out to be the issue. It wasn’t just base64 though it was also gzipped so base64 was returning some jumbled text. Oh well, now fixed!