public static bool IsLocationChanged(Location loc)
{
bool val = false;
if (HttpContext.Current.Cache["Location"] != null)
{
Location locContext = (Location)HttpContext.Current.Cache.Get("Location");
val = ((locContext.Latitude != loc.Latitude) || (locContext.Longitude != loc.Longitude));
}
return val;
}
public bool IsItGoingToRain(Location loc)
{
CultureInfo culture = (CultureInfo)CultureInfo.InvariantCulture.Clone();
//TODO: Fetch the weather from
string weatherurl = string.Format("http://api.wunderground.com/api/886500b765f937a7/conditions/forecast/q/{0},{1}.xml",
loc.Latitude.ToString("f5", culture),
loc.Longitude.ToString("f5", culture));
//Feature: conditions - Returns the current temperature, weather condition, humidity, wind,
//'feels like' temperature, barometric pressure, and visibility.
return _getAnswerDataFromURL(weatherurl);
}
protected void Page_Load(object sender, EventArgs e)
{
Response.ContentType = "application/json";
bool isItGoingtoRain = false;
Location loc = null;
RainHelper rainHelper = new RainHelper();
float lat = string.IsNullOrEmpty(Request["lat"]) ? float.NaN : float.Parse(Request["lat"], CultureInfo.InvariantCulture);
float lon = string.IsNullOrEmpty(Request["lat"]) ? float.NaN : float.Parse(Request["lon"], CultureInfo.InvariantCulture);
if (float.IsNaN(lat) || float.IsNaN(lon))
{
// Oh well -- no location available. Let's do a geoip lookup and see if that works
string ip = string.IsNullOrEmpty(Request["ip"]) ? Request.UserHostAddress : Request["ip"];
// This is because AppHarbor doesn't give me the ip address
if (ip != null && ip.StartsWith("10.") && !string.IsNullOrEmpty(Request.Headers["X-Forwarded-For"]))
ip = Request.Headers["X-Forwarded-For"];
// Localhost? I guess we will just use a location in copenhagen
if (ip == "::1" || ip == "127.0.0.1")
ip = "87.72.246.106";
IPAddress ipaddr = IPAddress.Parse(ip);
//Check if Location exists in cache
if (HttpContext.Current.Cache["Location"] == null)
{
//Get Location from url and add it into cache
loc = rainHelper.GetLocationByIp(ipaddr);
CacheHelp.SetLocationToContext(loc);
}
else
loc = CacheHelp.GetLocationFromContext(); //Get Location from the cache
}
else
{
loc = new Location()
{
Longitude = lon,
Latitude = lat,
};
//if Location is changed, then we must set new values in cache
if (HttpContext.Current.Cache["Location"] == null)
CacheHelp.SetLocationToContext(loc);
else
{
if (CacheHelp.IsLocationChanged(loc))
{
CacheHelp.ClearCacheItems();
CacheHelp.SetLocationToContext(loc);
}
}
}
//
//Check for IsItGoingToRain
if (HttpContext.Current.Cache["IsItGoingToRain"] == null)
{
isItGoingtoRain = rainHelper.IsItGoingToRain(loc);
CacheHelp.SetIsItGoingToRainToContext(isItGoingtoRain); //Set the other key in cache
}
else
isItGoingtoRain = CacheHelp.GetIsItGoingToRainFromContext(); //Read key value from the cache
Output = isItGoingtoRain ? "Yes" : "No";
}
public static void SetLocationToContext(Location loc)
{
//Set Location to the cache
//lifetime for the lookup is 5 minutes
HttpContext.Current.Cache.Insert("Location", loc, null, DateTime.Now.AddMinutes(5), TimeSpan.Zero, System.Web.Caching.CacheItemPriority.Default, null);
}
