IAsyncResult IHttpAsyncHandler.BeginProcessRequest(HttpContext http, AsyncCallback cb, object extraData)
{
var request = http.Request;
var response = http.Response;
var route = request.FilePath.ToLowerInvariant();
_my = new AnyRequest {
Http = http,
NotifyCompletion = () => endRequest(_my, cb),
Route = route
};
logStart(_my);
response.Headers.Set("Access-Control-Allow-Origin", "*");
try
{
startRequest(_my);
}
catch (ApplicationException ex)
{
_my.UserError = ex.Message;
endRequest(_my, cb);
}
catch (Exception ex)
{
_my.InternalError = ex;
endRequest(_my, cb);
}
return(this);
}
private void startRequest(AnyRequest my)
{
var http = my.Http.Request;
switch (my.Route)
{
case "/thumbnail": {
var width = http.RequireInt("width");
var height = http.RequireInt("height");
var url = http.Require("url");
break;
}
default: {
throw new ApplicationException($"Route '{my.Route}' is not found");
}
}
}
private void writeResponse(AnyRequest my)
{
var response = my.Http.Response;
if (my.InternalError != null)
{
response.ContentType = "application/json";
response.StatusCode = 500;
var data = new {
Error = my.InternalError.Message
};
response.Write(data.ToJson());
return;
}
if (my.UserError != null)
{
response.ContentType = "application/json";
response.StatusCode = 400;
var data = new {
Error = my.UserError
};
response.Write(data.ToJson());
return;
}
if (my.Json != null)
{
response.ContentType = "application/json";
response.StatusCode = 400;
response.Write(my.Json);
return;
}
if (my.Image != null)
{
response.ContentType = "image/png";
response.BinaryWrite(my.Image);
return;
}
}
private void endRequest(AnyRequest my, AsyncCallback notifyCompletion)
{
writeResponse(my);
_isCompleted = true;
notifyCompletion(this);
}
private void logEnd(AnyRequest my)
{
}
private void logStart(AnyRequest my)
{
}