How to return HTML code from Lambda function in NodeJS?

Question

I have the following Lambda function.

I need to return some custom html when the function is called.

I tried:

    exports.handler = async (event, context, callback) => {   
        const response = {
            statusCode: 200,
            headers: {
                'Content-Type': 'text/html',
            },
            body: String("Hi there !"),
        };
        return response;
    }

But when invoking the function, I'm getting the following error: The Lambda function returned an invalid entry in the headers object: Each header entry in the headers object must be an array. We can't connect to the server for this app or website at this time.

I took the code from AWS blueprint:

Original code from AWS:

Does anyone know what I'm doing wrong please?

Thanks. Cheers,

Answer 1

You appear to have used the regular AWS Lambda blueprint. Edge Lambda functions are different eg the status code is returned in status , not in statusCode .

Based on the documented example :

exports.handler = (event, context, callback) => {
    const response = {
        status: '200',
        statusDescription: 'OK',
        headers: {
            'cache-control': [{
                key: 'Cache-Control',
                value: 'max-age=100'
            }],
            'content-type': [{
                key: 'Content-Type',
                value: 'text/html'
            }]
        },
        body: "some HTML content here",
    };
    callback(null, response);
};