Logging the Redbull Stratos API

redbull-stratos-api-log.php

<?php

    /*

    Log RedBullStratos Telemetry

    Each telemetry data point is in the form:
  
    [AltitudeImperial] => 103477.69028871
    [AltitudeIsValid] => 1
    [AltitudeMetric] => 31540
    [CO2] => 0.16
    [CO2IsValid] => 1
    [CabinAirPressureBar] => 0.552270058929
    [CabinAirPressureIsValid] => 1
    [CabinAirPressurePSI] => 8.01
    [CabinTemperatureImperial] => 52.25
    [CabinTemperatureIsValid] => 1
    [CabinTemperatureMetric] => 12.25
    [CompassBearing] => 255.8
    [CompassDirection] => West
    [DirectionIsValid] => 1
    [GpsIsValid] => 1
    [GroundSpeedImperial] => 24.047017324788
    [GroundSpeedIsValid] => 1
    [GroundSpeedMetric] => 38.7
    [Id] => 1404936
    [Latitude] => 33.31489
    [Longitude] => -103.797115
    [OutsideAirPressureBar] => 0.022752699057
    [OutsideAirPressureIsValid] => 1
    [OutsideAirPressurePSI] => 0.33
    [OutsideTemperatureImperial] => -12.55
    [OutsideTemperatureIsValid] => 1
    [OutsideTemperatureMetric] => -23.75
    [Oxygen] => 23.5
    [OxygenIsValid] => 1
    [VerticalSpeedImperial] => 1062.9921259843
    [VerticalSpeedIsValid] => 1
    [VerticalSpeedMetric] => 5.4
    */

    $write = fopen("redbull.log", "a+");
    $lastId = 0;

    for(;;) 
    {
        $fp = fopen("http://services.redbullstratos.com/LiveData/Get?callback=redbullStratos.liveBroadcast.makeRequestCallback","r");
    
        $data = str_replace("redbullStratos.liveBroadcast.makeRequestCallback", "", stream_get_contents($fp));
        $data = substr($data, 1,strlen($data)-2);
        
        $object = json_decode($data);

        foreach($object->Telemetry as $index => $obj) {
            if($obj->Id > $lastId) {
                fwrite($write, implode(",", array(time()) + get_object_vars($obj)) . "\n");

                $lastId = $obj->Id;
            }
        }

        sleep(5);
    }
?>