ValidateSubprotocol() [3/3]

static void System.Net.WebSockets.WebSocketValidate.ValidateSubprotocol ( string subProtocol )

inlinestaticpackage

Definition at line 28 of file WebSocketValidate.cs.

    {
        if (string.IsNullOrWhiteSpace(subProtocol))
        {
            throw new ArgumentException(System.SR.net_WebSockets_InvalidEmptySubProtocol, "subProtocol");
        }
        string text = null;
        for (int i = 0; i < subProtocol.Length; i++)
        {
            char c = subProtocol[i];
            if (c < '!' || c > '~')
            {
                text = $"[{c}]";
                break;
            }
            if (!char.IsLetterOrDigit(c) && "()<>@,;:\\\"/[]?={} ".IndexOf(c) >= 0)
            {
                text = c.ToString();
                break;
            }
        }
        if (text != null)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_WebSockets_InvalidCharInProtocolString, subProtocol, text), "subProtocol");
        }
    }

References System.SR.Format(), System.SR.net_WebSockets_InvalidCharInProtocolString, System.SR.net_WebSockets_InvalidEmptySubProtocol, and System.text.