public void ProcessRequest(HttpContext context)
{
// Get the JSON string representing the saved graphics from the cookies.
var graphicsCookie = context.Request.Cookies["graphics"];
string json;
if (graphicsCookie != null)
{
json = context.Request.Cookies["graphics"].Value;
// The cookie needs to be decoded to become valid JSON.
json = context.Server.UrlDecode(json);
}
else
{
json = context.Request.Params["graphics"];
}
if (json == null)
{
// Write an error message if the cookie was not found.
context.Response.Write("Cookie or parameter not found: \"graphics\"");
context.Response.StatusCode = 500;
return;
}
// Get the format parameter, and set an initial value if one is not provided.
string format = context.Request.Params["f"];
if (format == null)
{
format = string.Empty;
}
if (Regex.IsMatch(format, "(?i)km[lz]"))
{
// Generate a KML document.
var jsSerializer = new JavaScriptSerializer();
// Loop through the layers.
var layers = jsSerializer.Deserialize <Dictionary <string, object> >(json);
var kml = ConversionUtilities.LayersDictionaryToKml(layers);
// Export the KML markup into either KML or KMZ, depending on the specified format.
var kmlFile = KmlFile.Create(kml, true);
if (string.Compare(format, "kmz", true) == 0)
{
var kmzFile = KmzFile.Create(kmlFile);
context.Response.ContentType = "application/vnd.google-earth.kmz";
context.Response.AddHeader("Content-Disposition", "filename=ExportedGraphics.kmz");
kmzFile.Save(context.Response.OutputStream);
}
else
{
context.Response.ContentType = "application/vnd.google-earth.kml+xml";
context.Response.AddHeader("Content-Disposition", "filename=ExportedGraphics.kml");
kmlFile.Save(context.Response.OutputStream);
}
}
else
{
context.Response.ContentType = "application/json";
context.Response.AddHeader("Content-Disposition", "filename=ExportedGraphics.json");
context.Response.Write(json);
}
}
