What fields does a Serverless HTTP event have in AWS Lambda?

I was reading through the Serverless docs, and I wasn’t clear on exactly what was available on the event that gets passed in when I use the default lambda-proxy integration, so I wrote it out via console.log.

I’ve submitted a pull request to the docs, but here it is for now.

{
    "resource": "/",
    "path": "/",
    "httpMethod": "POST",
    "headers": {
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
        "Accept-Encoding": "gzip, deflate, br",
        "Accept-Language": "en-GB,en-US;q=0.8,en;q=0.6,zh-CN;q=0.4",
        "cache-control": "max-age=0",
        "CloudFront-Forwarded-Proto": "https",
        "CloudFront-Is-Desktop-Viewer": "true",
        "CloudFront-Is-Mobile-Viewer": "false",
        "CloudFront-Is-SmartTV-Viewer": "false",
        "CloudFront-Is-Tablet-Viewer": "false",
        "CloudFront-Viewer-Country": "GB",
        "content-type": "application/x-www-form-urlencoded",
        "Host": "j3ap25j034.execute-api.eu-west-2.amazonaws.com",
        "origin": "https://j3ap25j034.execute-api.eu-west-2.amazonaws.com",
        "Referer": "https://j3ap25j034.execute-api.eu-west-2.amazonaws.com/dev/",
        "upgrade-insecure-requests": "1",
        "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36",
        "Via": "2.0 a3650115c5e21e2b5d133ce84464bea3.cloudfront.net (CloudFront)",
        "X-Amz-Cf-Id": "0nDeiXnReyHYCkv8cc150MWCFCLFPbJoTs1mexDuKe2WJwK5ANgv2A==",
        "X-Amzn-Trace-Id": "Root=1-597079de-75fec8453f6fd4812414a4cd",
        "X-Forwarded-For": "50.129.117.14, 50.112.234.94",
        "X-Forwarded-Port": "443",
        "X-Forwarded-Proto": "https"
    },
    "queryStringParameters": null,
    "pathParameters": null,
    "stageVariables": null,
    "requestContext": {
        "path": "/dev/",
        "accountId": "125002137610",
        "resourceId": "qdolsr1yhk",
        "stage": "dev",
        "requestId": "0f2431a2-6d2f-11e7-b799-5152aa497861",
        "identity": {
            "cognitoIdentityPoolId": null,
            "accountId": null,
            "cognitoIdentityId": null,
            "caller": null,
            "apiKey": "",
            "sourceIp": "50.129.117.14",
            "accessKey": null,
            "cognitoAuthenticationType": null,
            "cognitoAuthenticationProvider": null,
            "userArn": null,
            "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36",
            "user": null
        },
        "resourcePath": "/",
        "httpMethod": "POST",
        "apiId": "j3azlsj0c4"
    },
    "body": "postcode=LS17FR",
    "isBase64Encoded": false
}