/// <summary>
/// Handle a HTTP request. Only GET requests are supported.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private async void HandleRequest(StreamSocketListener sender, StreamSocketListenerConnectionReceivedEventArgs args)
{
try
{
StringBuilder request = new StringBuilder();
// Handle an incoming request
// First read the request
using (IInputStream input = args.Socket.InputStream)
{
byte[] data = new byte[BufferSize];
IBuffer buffer = data.AsBuffer();
uint dataRead = BufferSize;
while (dataRead == BufferSize)
{
await input.ReadAsync(buffer, BufferSize, InputStreamOptions.Partial);
request.Append(Encoding.UTF8.GetString(data, 0, data.Length));
dataRead = buffer.Length;
}
}
var requestLines = request.ToString().Split('\r', '\n');
if ((requestLines.Length > 0) && requestLines[0].ToUpper().StartsWith("GET "))
{
var url = requestLines[0].Substring(4).Split(' ')[0];
if (!await SendFile(args.Socket.OutputStream, url))
{
// if no static file has been served, check for a REST call
var e = new RestCommandArgs(url);
RestCommand?.Invoke(this, e);
if (e.IsValid)
{
var htmlResponse = string.IsNullOrEmpty(e.HtmlResponse) ? $"<html><body>Ok. ({e.Command})</body></html>" : e.HtmlResponse;
SendHtmlResponse(args.Socket.OutputStream, 200, "OK", htmlResponse);
}
else
{
SendHtmlResponse(args.Socket.OutputStream, 400, "Bad Request", $"<html><body><h1>Bad Request</h1>Invalid command: {e.Command}<br/>{e.ErrorMessage}</body></html>");
}
}
}
else
{
SendHtmlResponse(args.Socket.OutputStream, 400, "Bad Request", "<html><body>Bad Request</body></html>");
}
}
catch (Exception ex)
{
SendHtmlResponse(args.Socket.OutputStream, 500, "Internal Server Error", $"<html><body>Internal Server Error{ex}</body></html>");
}
}
/// <summary>
/// Handle a REST command.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Server_RestCommand(object sender, RestCommandArgs e)
{
try
{
var parts = e.Command.ToLower().Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
if ((parts.Length >= 4) && (parts[0] == "api"))
{
switch (parts[1])
{
case "gpio":
// switch GPIO pins directly, example: /api/gpio/17/1
e.IsValid = gpio.SetGPIO(parts[2], parts[3]);
break;
case "shutter":
// control a shutter group
e.IsValid = ShutterControl(parts[2], parts[3]);
break;
default:
// return "bad request"
e.IsValid = false;
e.ErrorMessage = $"\"{parts[1]}\" is an unknown api object. Valid objects are \"gpio\" or \"shutter\".";
break;
}
}
else
{
// return "bad request"
e.IsValid = false;
}
}
catch (Exception ex)
{
e.IsValid = false;
e.ErrorMessage = "Exception: " + ex.Message;
}
}