Cacher is the code snippet organizer for pro developers

<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/hmac-sha1.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/components/enc-base64-min.js"></script>
<script type="text/javascript">
function CalculateSig(stringToSign, privateKey){
    //calculate the signature needed for authentication
    var hash = CryptoJS.HmacSHA1(stringToSign, privateKey);
    var base64 = hash.toString(CryptoJS.enc.Base64);
    return encodeURIComponent(base64);
}

//set variables
var d = new Date;
var expiration = 3600; // 1 hour,
var unixtime = parseInt(d.getTime() / 1000);
var future_unixtime = unixtime + expiration;
var publicKey = "{key here}";
var privateKey = "{key here}";
var method = "POST";
var route = "forms/{form id here}/submissions";

stringToSign = publicKey + ":" + method + ":" + route + ":" + future_unixtime;
sig = CalculateSig(stringToSign, privateKey);
var url = 'http://domain.com/gravityformsapi/' + route + '?api_key=' + publicKey + '&signature=' + sig + '&expires=' + future_unixtime;

// input ID's on form (within GF editor)
var values = {input_values : {
                              input_1 : 'John',
                              input_2 : 'Smith',
                              input_5 : 'john.smith@example.com',
                              input_4 : 'Message goes here...'
                            }
        }

//json encode array
values_json = JSON.stringify(values);

$.post(url, values_json, function(data){
    console.log(data.response);
});
</script>