how to send binary data over websocket? about websocketlistener HOT 8 CLOSED

It is in the main page, in the "Sending messages" section:

using (var messageWriter = ws.CreateMessageWriter(WebSocketMessageType.Binary))
   await myFileStream.CopyToAsync(messageWriter);

Cheers.

from websocketlistener.

Thanks for the quick response. I am having another question regarding deflate compression support for Safari browser. When I tested with sample web socket app on Safar, it is sending extension as x-webkit-deflate-frame and found that WS HTTP handshake response doesn't have ws-extension header. Wondering if this is supported in safari browser or not?

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The browser should issue a request containing something like:

Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits, x-webkit-deflate-frame

As far as I remember x-webkit-deflate-frame was the experimental support, but permessage-deflate will be the standard (I believe it is still a draft).

The server should reply a response with:

Sec-WebSocket-Extensions: permessage-deflate; blah.. blah...

Indicating that the extension is accepted, otherwise, check this howto to see if you configured it right: https://github.com/vtortola/WebSocketListener/wiki/Deflate-extension

from websocketlistener.

I did registered deflate extension as per the documentation and for Chrome it is getting response with "Sec-WebSocket-Extensions: permessage-deflate; " but thats not happening with Safari browser. The only difference is Chrome sends "permessage-deflate" in request whereas Safari sends "x-webkit-deflate-frame".

from websocketlistener.

In that case it won't work.

You can try to reuse my code to create your own, for example if the semantics are exactly the same you can try something like:

public sealed class WebSocketSafariDeflateExtension : IWebSocketMessageExtension
{
    public string Name { get { return "x-webkit-deflate-frame"; } }

    static readonly WebSocketExtension _response = new WebSocketExtension("x-webkit-deflate-frame", new List<WebSocketExtensionOption>(new[] { new WebSocketExtensionOption() { Name = "client_no_context_takeover" } }));
    public bool TryNegotiate(WebSocketHttpRequest request, out WebSocketExtension extensionResponse, out IWebSocketMessageExtensionContext context)
    {
        extensionResponse = _response;
        context = new WebSocketDeflateContext();
        return true;
    }
}

Again this is assuming that "client_no_context_takeover" works also when using "x-webkit-deflate-frame".

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i have followed this approach, but initial handshake is failing for safari browser. I can see that the extension is getting invoked during handshake, but client throws error saying invalid header "deflate-frame"

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Here is the actual error on browser console for Safari:

WebSocket connection to 'ws://3.20.165.63:28818' failed: Received unexpected deflate-frame parameter

from websocketlistener.

That is probably because Safari's implementation does not support the parameter "client_no_context_takeover", which is needed to work with DeflateStream compressing message by message. Sorry.

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