Access-Control-Allow-Methods does not work

[mac-ro-ni]

I'm try to set Access-Control-Allow-Methods with a custom http request method types but it does not show on actual response headers

Custom Method : "RDSERVICE"

WebServer.Settings.Headers["Access-Control-Allow-Methods"] = "RDSERVICE";

[mac-ro-ni]

I was setting the request header.
Please guide me to set response header.

[mac-ro-ni]

Update
I have added Custom method to response headers in DefaultRoute using
ctx.Response.Headers["Access-Control-Allow-Methods"] = "RDSERVICE";
It is working fine with GET Request but when i try sending OPTIONS request it shows default methods i.e OPTIONS, HEAD , GET, PUT, POST, DELETE

[jchristn]

Did you try overloading Routes.Preflight?

[mac-ro-ni]

I didn't try that. please give an example for that

[jchristn]

You can see the default implementation here: https://github.com/jchristn/WatsonWebserver/blob/653fd49292faefe009a29acdcaaae81d715d69de/WatsonWebserver/WatsonWebserverRoutes.cs#L185

[mac-ro-ni]

@jchristn Thank you so much!

[mac-ro-ni]

After setting preflight cors error is resolved but the response is not being sent from the request

[jchristn]

Could you show me your code?

[mac-ro-ni]

WebServer:

WebServer = new Server("127.0.0.1", 11100, false, DefaultRoute); 
WebServer.Routes.Preflight = PreflightRoute;
WebServer.Start();

Routes:

 private async Task DefaultRoute(HttpContext arg)
        {
            String sourceIp = arg.Request.Url.Full;
           // HTTPIncomingRequest.Invoke(new Action(delegate () { HTTPIncomingRequest.Text = sourceIp; }));
            //Logcat.Invoke(new Action(delegate () { Logcat.Text += arg.ToJson(); }));
            arg.Response.Headers["Access-Control-Allow-Methods"] = "RDSERVICE";
            await arg.Response.Send("Hola");

        }

 private async Task PreflightRoute(HttpContext arg)
        {
            String sourceIp = arg.Request.Source.IpAddress;
           // HTTPIncomingRequest.Invoke(new Action(delegate () { HTTPIncomingRequest.Text = sourceIp; }));
          //  Logcat.Invoke(new Action(delegate () { Logcat.Text += "Preflight" + arg.ToJson(); }));
            arg.Response.Headers["Access-Control-Allow-Methods"] = "RDSERVICE";
            arg.Response.Headers["Content-type"] = "application/xml";
            await arg.Response.Send().ConfigureAwait(false);

        }

Developer Tools Screenshot: https://i.imgur.com/vyDH6El.png

[jchristn]

It's going to depend on how you implement your TCP client library. I have a few out there (SuperSimpleTcp being one) and there are others, or you can implement your own using TcpClient.

[mac-ro-ni]

I'm using SuperSimpleTCP Server to communicate with the other TCP clients but i'm confused about using the TCP received data as response for WatsonWebServer

[jchristn]

The received data should be a byte array that is given to you in an event. You can use the HttpResponse.Send(byte[]) method to send it. Is it not working?

[mac-ro-ni]

How to access data received from tcp client inside a HTTPRoute?

[jchristn]

I see two approaches. One, with SuperSimpleTcp, is to maintain a dictionary, key-value store, or table that is accessible to both the TCP client and the webserver. When data is received by the TCP client, put it in that repository, and have the webserver continually monitor for new data. The other is to use a library that provides explicit access to the underlying TCP socket, such as CavemanTcp. That library will allow you to directly read from the socket from within your route.