Hi

I am having issues using cookie-based authentication, when opening the web socket connection to wss://emea-1-t2.streaming-pricing-api.refinitiv.com:443/WebSocket. I am developing my application in C# against .Net 5.0 using the WebSocketSharp library.

Assume I have a valid access token/refresh token pair acquired from the authentication server https://api.refinitiv.com/auth/oauth2/v1/token, i.e.

{
    "access_token":"eyJ0e****effg",
    "refresh_token": "****-def6-47b3-aeb2-1468796846b5",
    "expires_in": "300",
    "token_type": "Bearer"
}

Request based

I can successfully authenticate using a Login request as the initial request on the form:

{
    "Domain":"Login",
    "ID":1,
    "Key":{
        "Elements":{
            "ApplicationId":"256",
            "AuthenticationToken":"aBcDeFgHiJkLmNoPqRsTuVwXyZ",
            "Position":"127.0.0.1"
        },
        "NameType":"AuthnToken"
    }
}

This means I get a repsonse stating that the data is streaming etc., and I can perform additional requests.

Cookie based

The story is different, when I try to use cookie based authentication. The feature is described in the Protocol Specification page 18, where one can supply the below HTTP cookies, before connecting:

*ads*authTokenName : AuthToken
*ads*positionName : position
*ads*applicationIdName : applicationId

No matter what I do, I am not able to authenticate using this method. I have tried different ApplicationIds and positions. My code for this part is:

WebSocket.SetCookie(new Cookie("*ads*authTokenName", access_token));
WebSocket.SetCookie(new Cookie("*ads*positionName", position));
WebSocket.SetCookie(new Cookie("*ads*applicationIdName", "256"));

First of all, the example application provided here uses som completely different header names, i.e. AuthToken, AuthPosition, and applicationId. They seem more legit, than those in the protocol specification, but nevertheless, it doesn't work.

Whenever I try to perform a request (not Login request) after the connection, I am met with the following exception, after which the connection terminates:

Received Log Event (Level: Fatal): WebSocketSharp.WebSocketException: The header of a frame cannot be read from the stream.
   at WebSocketSharp.WebSocketFrame.processHeader(Byte[] header)
   at WebSocketSharp.WebSocketFrame.<>c__DisplayClass73_0.<readHeaderAsync>b__0(Byte[] bytes)
   at WebSocketSharp.Ext.<>c__DisplayClass48_0.<ReadBytesAsync>b__0(IAsyncResult ar)

• Is cookie-based even possible?
• If so, which header names and values should I provide?
• Bonus question: Am I right in the assumption, that the token does not need to be refreshed, when application as a cookie? I not, what is the recommended method for refreshing it?