private async void PollObd()
{
try
{
string s;
if (simulatormode)
{
s = "SIMULATORWINPHONE";
}
else
{
s = await GetVIN();
}
lock (_lock)
{
data["vin"] = s;
}
while (true)
{
foreach (var cmd in piDs.Keys)
{
var key = piDs[cmd];
if (simulatormode)
{
s = ObdShare.ObdUtil.GetEmulatorValue(cmd);
}
else
{
s = await RunCmd(cmd);
}
if (s != "ERROR")
{
lock (_lock)
{
data[key] = s;
}
}
if (!running)
{
return;
}
}
await Task.Delay(Interval);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
running = false;
if (dataReaderObject != null)
{
dataReaderObject.Dispose();
dataReaderObject = null;
}
if (dataWriterObject != null)
{
dataWriterObject.Dispose();
dataWriterObject = null;
}
if (socket != null)
{
await socket.CancelIOAsync();
socket.Dispose();
socket = null;
}
}
}
private async void ProcessRequestAsync(StreamSocket socket)
{
// very rudimentary web server request processing
try
{
// grab the request
StringBuilder request = new StringBuilder();
byte[] data = new byte[BufferSize];
IBuffer buffer = data.AsBuffer();
uint dataRead = BufferSize;
using (IInputStream input = socket.InputStream)
{
while (dataRead == BufferSize)
{
await Task.Delay(50); // allow time for the data to arrive esp on wifi
var result = await input.ReadAsync(buffer, BufferSize, InputStreamOptions.Partial);
request.Append(Encoding.UTF8.GetString(data, 0, (int)result.Length));
dataRead = result.Length;
}
}
// build some handy wrapper objects for request and response
var req = new Request(request.ToString());
var res = new Response(socket);
if (req.Method == null)
{
Debug.WriteLine("Cannot retrieve HTTP method");
return;
}
// go through the defined routes to handle the request
// TODO: implement route matching based on string patterns
var path = req.Path;
bool handled = false;
switch (req.Method)
{
case "GET":
foreach (var t in getRoutes)
{
if (t.Item1 == path)
{
await t.Item2(req, res);
handled = true;
break;
}
}
if (!handled)
{
foreach (var t in getStaticRoutes)
{
if (path.StartsWith(t.Item1))
{
await t.Item2(req, res);
handled = true;
break;
}
}
}
if (!handled)
{
// REVIEW: is 404 the right status code to return?
await res.SendStatusAsync(404);
}
break;
case "POST":
foreach (var t in postRoutes)
{
if (t.Item1 == path)
{
await t.Item2(req, res);
handled = true;
break;
}
}
if (!handled)
{
// REVIEW: is 404 the right status code to return?
await res.SendStatusAsync(404);
}
break;
default:
Debug.WriteLine("HTTP method not supported: " + req.Method);
break;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
finally
{
await socket.CancelIOAsync();
socket.Dispose();
}
}
