private static void HttpListenHandler(IAsyncResult result)
{
HttpListenerContext context = null;
if (HttpListener == null)
{
return;
}
if (result != ApiListener.result)
{
return;
}
try
{
context = HttpListener.EndGetContext(result);
string body = null;
if (context.Request.HasEntityBody)
{
using (System.IO.Stream bodyStream = context.Request.InputStream)
{
using (System.IO.StreamReader reader = new System.IO.StreamReader(bodyStream, context.Request.ContentEncoding))
{
body = reader.ReadToEnd();
}
}
}
byte[] responseBuffer;
var response = "ok";
string command = "Unknown Command";
try
{
var urlParams = new List <string>(context.Request.RawUrl.Split(new char[] { '/' })).Select(us => Uri.UnescapeDataString(us)).ToList();
if (!string.IsNullOrWhiteSpace(body))
{
urlParams.Add(body);
}
if (string.IsNullOrWhiteSpace(urlParams.FirstOrDefault()))
{
urlParams.RemoveAt(0);
}
if (string.IsNullOrWhiteSpace(urlParams.LastOrDefault()) && urlParams.Any())
{
urlParams.RemoveAt(urlParams.Count - 1);
}
if (!urlParams.Any())
{
response = Documentation.Function(null);
}
else if (urlParams[0] == "favicon.ico")
{
context.Response.StatusCode = 404;
response = "Not found.";
}
else
{
command = urlParams[0];
urlParams.RemoveAt(0);
if (!Commands.ContainsKey(command))
{
throw new ApiError($"Invalid Command \"{command}\"");
}
command = Commands[command]?.Name; //normalize name for display during errors
response = Commands[command].Function(urlParams) ?? response;
}
}
catch (Exception e)
{
response = $"{command}: {e.Message}";
context.Response.StatusCode = e is ApiError ? 400 : 500;
}
responseBuffer = Encoding.UTF8.GetBytes(response);
context.Response.ContentType = "application/json; charset=utf-8";
// Get a response stream and write the response to it.
context.Response.ContentLength64 = responseBuffer.Length;
using (System.IO.Stream output = context.Response.OutputStream)
{
output.Write(responseBuffer, 0, responseBuffer.Length);
output.Close();
}
Log(Debug($"{context.Request.RawUrl} => {context.Response.StatusCode}: {response}"));
}
catch (Exception e) {
Log(Critical($"{context?.Request?.RawUrl ?? "(Error getting accessed URL)"} => {e.Message}"));
}
finally
{
try
{
if (HttpListener.IsListening)
{
Listen();
}
}
catch (ObjectDisposedException)
{ }
}
}