private Task _listen()
{
return(Task.Factory.StartNew(() =>
{
try
{
while (IsListening)
{
HttpListenerContext ctx = _listener.GetContext();
HttpListenerRequest req = ctx.Request;
HttpListenerResponse resp = ctx.Response;
try
{
string accesslog = DateTime.Now.ToString("o");
accesslog += "\t" + string.Format("Request #: {0}", ++_requestCount);
accesslog += "\t" + req.Url.ToString();
accesslog += "\t" + req.HttpMethod;
accesslog += "\t" + req.UserHostAddress;
accesslog += "\t" + req.UserAgent;
string origin = _getOrigin(req);
accesslog += "\t" + origin;
bool forbidden = false;
if (_url == origin || config.allowedDomains.Contains(origin))
{
resp.AppendHeader("Access-Control-Allow-Origin", origin);
}
else
{
if (req.Url.AbsolutePath == "/permissions")
{
resp.AppendHeader("Access-Control-Allow-Origin", origin);
}
else
{
resp.AppendHeader("Access-Control-Allow-Origin", _url);
forbidden = true;
}
}
if (req.HttpMethod == "OPTIONS")
{
resp.AddHeader("Access-Control-Allow-Headers", "*");
resp.StatusCode = (int)HttpStatusCode.OK;
resp.StatusDescription = "OK";
resp.Close();
}
else
{
if (forbidden)
{
accesslog += "\tfailed\tsame origin";
ServerConfig.appendLog(accesslog);
resp.StatusCode = (int)HttpStatusCode.Forbidden;
resp.StatusDescription = "FORBIDDEN";
resp.Close();
}
else
{
bool is404 = false;
if (req.Url.AbsolutePath == "/")
{
is404 = _home.handle(req, resp, accesslog);
}
else if (req.Url.AbsolutePath == "/permissions")
{
is404 = _permissions.handle(req, resp, accesslog);
}
else if (req.Url.AbsolutePath == "/printers")
{
is404 = _printers.handle(req, resp, accesslog);
}
else
{
is404 = true;
}
if (is404)
{
accesslog += "\tfailed\tnot found";
ServerConfig.appendLog(accesslog);
resp.StatusCode = (int)HttpStatusCode.NotFound;
resp.StatusDescription = "NOT FOUND";
resp.Close();
}
}
}
}
catch (Exception e)
{
ServerConfig.appendLog("Error: " + e.Message + "\n" + e.StackTrace);
resp.StatusCode = (int)HttpStatusCode.InternalServerError;
resp.StatusDescription = "INTERNAL SERVER ERROR";
resp.Close();
}
}
} catch (Exception e)
{
if (!(e is HttpListenerException && (e as HttpListenerException).ErrorCode == 995))
{
ServerConfig.appendLog(e.GetType().Name + ": " + e.Message + "\n" + e.StackTrace);
}
return false;
}
return true;
}));
}
