demo auth js for cf workshop in Shenzhen

auth.js

//Response when token ts does not match.
var response403 = {
    statusCode: 403,
    statusDescription: 'Unauthorized',
    headers: {
        'cache-control': { 
            'value': 'max-age=1296000'
        }
    }
};

function is_valid_token(token, ts) {
    if( token === 'cf_workshop' && ts === '20220624'){
        return true;
    }
    else
    {
        return false;
    }
};

function handler(event) {

    // Get request info
    var request = event.request;

    // If no token, then generate HTTP 403 response.
    if(!request.querystring.token || !request.querystring.ts) {
        console.log("Error: No token or ts in the querystring");
        return response403;
    }

    var token = request.querystring.token.value;
    var ts = request.querystring.ts.value;
    // If no token value, then generate HTTP 403 response.
    if(!token || !ts){
        return response403;
    }
    
    // invalid token, return 403 response
    if (!is_valid_token(token, ts)){
        return response403;
    }
    return request;
}