private static void ProcessResponse <T>(HttpWebRequest request, RequestState <T> state)
{
try
{
using (var response = (HttpWebResponse)request.GetResponse())
{
if (state.Callback != null)
{
state.Callback(Response <T> .CreateSuccess(GetResponseBody(response)));
}
}
}
catch (Exception ex)
{
if (state.Callback != null)
{
state.Callback(Response <T> .CreateError(HandleException(ex)));
}
}
}
/**
* Invoked when the request channel is closed.
*/
protected void CloseHandler(object o, EventArgs args)
{
RequestState request = null;
lock (_sync) {
//retrieve the request state assiciated with the closed channel
request = (RequestState)_channel_to_state[o];
if (request == null)
{
//cannot happen
Console.Error.WriteLine("VTS unable to retrieve request for a closed channel");
return;
}
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1} channel closed.", _node.Address, request.Start);
#endif
_channel_to_state.Remove(o);
_num_requests--;
}
/**
* The request object has been removed the shared data structure.
* Since no one alse has access to it, it can be accessed outside the lock.
*/
SortedList sorted_result = new SortedList();
#if VTS_DEBUG
SortedList sorted_stat = new SortedList();
#endif
NCService.VivaldiState local_vs = _nc_service.State;
foreach (Address target in request.ResultTable.Keys)
{
object[] curr_result = (object[])request.ResultTable[target];
NCService.VivaldiState vs = (NCService.VivaldiState)curr_result[0];
double d = local_vs.Position.GetEucledianDistance(vs.Position);
sorted_result[d] = target;
#if VTS_DEBUG
Console.Error.WriteLine("VTS local: {0}, start: {1}, dest: {2}, distance: {3}",
_node.Address, request.Start, target, d);
string host = (string)curr_result[1];
sorted_stat[d] = new object[] { d, host };
#endif
}
#if VTS_DEBUG
lock (_sync) {
_query_list.Add(sorted_stat);
}
#endif
request.Callback(request.Start, sorted_result, request.Current);
}
private static void GetResponseCallback(IAsyncResult result)
{
RequestState state = (RequestState)result.AsyncState;
HttpWebResponse httpResponse = null;
try
{
using (System.Threading.Timer timeoutTimer = new System.Threading.Timer(new System.Threading.TimerCallback(o => state.Request.Abort())))
{
httpResponse = (HttpWebResponse)state.Request.EndGetResponse(result);
}
}
catch (WebException ex)
{
StringBuilder error = new StringBuilder();
error.AppendLine("URI: {0}".FormatString(state.Request.RequestUri));
error.AppendLine("Method: {0}".FormatString(state.Request.Method));
//If there was a web exception, we'll still try to parse the response.
if (ex.Response != null)
{
using (StreamReader reader = new StreamReader(ex.Response.GetResponseStream()))
{
error.AppendLine(reader.ReadToEnd());
}
}
state.OnError(new ApplicationException(error.ToString(), ex));
return;
}
if (state.Callback != null)
{
state.Callback(httpResponse);
}
}
