AWS Cloudfront is not classifying the Tablet device as Tablet

Question

When using lambda I could either get 'Desktop' or 'Mobile'.

but if I send a Tablet UserAgent, it is not classifying it as Tablet.

Here is the lambda code that i used!

exports.handler = (event, context, callback) => {
    var region = process.env.AWS_REGION ? process.env.AWS_REGION : 'us-east-1';
    console.log(region);
    console.log(event);

    var device = {};
    if( event.headers['CloudFront-Is-Mobile-Viewer']  === "true" )
         device.device = 'Mobile';
    else if ( event.headers['CloudFront-Is-Tablet-Viewer']  === "true" )
         device.device = 'Tablet';
     else
         device.device = 'Desktop';

     var response = {
        statusCode: 200,
        body: JSON.stringify(device)
    };

    callback(null, response);
};

I did double checked the headers received to lambda as well.

'CloudFront-Is-Desktop-Viewer': 'true',
'CloudFront-Is-Mobile-Viewer': 'false',
'CloudFront-Is-SmartTV-Viewer': 'false',
'CloudFront-Is-Tablet-Viewer': 'false',
'CloudFront-Viewer-Country': 'US',

Answer 1

You can seek reference from the below link:

http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/header-caching.html#header-caching-web-device

So if you are down-converting these to a single device categorization, you are likely to get the most sensible result if you test them in this order, stopping on the first match:

CloudFront-Is-SmartTV-Viewer
CloudFront-Is-Tablet-Viewer
CloudFront-Is-Mobile-Viewer
CloudFront-Is-Desktop-Viewer