Login request rejected, decoding failed

Ryan.Dowell

When attempting to log in with websockets RCC API, client is receiving
{"Stream":"ClosedRecover","Data":"Suspect","Code":"UsageError","Text":"Login request rejected, decoding failed"}}] LOG_INFO vtisprc 30.01.2023 07:26:02.753313 6224(520) Tr2Session[919] Status [Login]: Login request rejected, decoding failed

What would cause this error? Do we have any additional resources regarding this? Thanks

wasin.w

Hello @Ryan.Dowell

Did the application request the access token from the RDP API and send that token with the WebSocket Login message to RCC?

Basically, the application needs to send an HTTP Post request to RDP API first:

POST /auth/oauth2/v1/token HTTP/1.1
Accept: */*
Content-Type: application/x-www-form-urlencoded
Host: api.refinitiv.com:443
Content-Length: XXX

username=GEM-XXXXX
&password=XXXXXXX
&client_id=GEM-XXXXX 
&grant_type=password
&takeExclusiveSignOnControl=true

Then, the RDP API sends the access token back to the application as a JSON message

{
  "access_token": "<Access Token>",
  "refresh_token": "XXXXXX",
  "expires_in": "600",
  "scope": "ZZZZZZZ",
  "token_type": "Bearer"
}

Next, the application establishes a connection to the RCC WebSocket server and sends the WebSocket Login request message to RCC with the access token. The JSON message format is as follows:

{
  "Domain":"Login",
  "ID":1,
  "Key":{
    "Elements":{
      "ApplicationId":"256",
      "AuthenticationToken":"<Access Token>",
      "Position":"Machine IP/Machine Hostname"
    },
    "NameType":"AuthnToken"
  }
}

The client can find more detail about RCC and the WebSocket direct connection via this tutorial page.

Hope this helps.

Jirapongse

@Ryan.Dowell

Thanks for reaching out to us.

If the problem always happens, please share the login request message and the RCC hostname that the client is using. We will check the format of the login request message.

However, if the problem happens intermittently, please contact the Refinitiv Contributions Channel support team directly via MyRefinitiv. The error was sent by the RCC server so the support team may be able to check the cause of this error.