html+js-timeSeriesGetWithPagingAndChart.html

﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>    
    <script src="http://dygraphs.com/dygraph-combined.js"></script>    
    <meta charset="utf-8" />
    <title>HTML5 and jQuery.js demonstration of the OptiRTC Public HTTP API.</title>
</head>
<body>
    <p>HTML5 and jQuery.js demonstration of the OptiRTC Public HTTP API.</p>
    <p>GET a time range of datapoints and draw a graph on this page and write the data to the browser's javascript console when all of the data from the original request has been received.</p>
    <p>This example uses the Dygraphs project to render its UI.</p>
    <p>In Google Chrome, open the Developer Tools and navigate to the Console tab to see mid-process output of this example.</p>
    <div id="graphdiv"></div>
    <script type="text/javascript">
        //declare global variables
        var dataValues = "Date, Temperature [deg F]\n";
        var pages = 0;
        var totalCount = 0;

        function GetValues(url) {
            $.ajax({
                url: url,
                dataType: "json",
            }).done(function (data) {
                pages = pages + 1;
                //this example gets all of the datapoint objects of the request and puts them in a local array before returning the complete dataset
                //alternate implementations might render these data points here as they come in to provide a more responsive and fluid page load
                $.each(data.Items, function (i, item) {
                    dataValues = dataValues + item.timeValue + ',' + item.value[0].value + '\n';
                });
                
                totalCount = totalCount + data.Count;

                //show the last page of data in the browser javascript console => remove in production systems
                console.log(data);

                //handle paging; next page of data provided by NextPageLink, which is typeof() == 'undefined' if the client just received the last page of data
                //see http://stackoverflow.com/questions/3390396/how-to-check-for-undefined-in-javascript
                if (typeof (data.NextPageLink) != 'undefined') {
                    GetValues(data.NextPageLink);
                }
                else {
                    //paging complete                     
                    console.log('\n');
                    console.log('Paging complete, total non-null datapoints received: ' + totalCount + ' in ' + pages + ' pages.');

                    g = new Dygraph(
                        document.getElementById("graphdiv"),
                        dataValues,
                        {}
                    );
                }
            });
        };

        $(document).ready(function () {
            //load a document of OptiRTC data.
            GetValues("https://public.optirtc.com/api/datapoint/?key={YOUR-KEY-HERE, NO BRACKETS}&dataStreamId={dataStreamId}&utcHistorical=5/2/2013&utcModern=5/8/2013");
        });
    </script>
</body>
</html>