打开数据通道的请求不包含令牌

Question

aws ssm start-session returns url and token to open WebSocket Connection. https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_StartSession.html#API_StartSession_ResponseSyntax

Tried a client to open WebSocket connection: https://hashrocket.com/blog/posts/development-of-a-simple-command-line-websocket-client

But I am getting following error when trying to send input like {"type": "echo", "payload": "whoami"}

websocket: close 1003 (unsupported data): Channel : request to open data channel does not contain token.

I tried setting headers with multiple options like

headers := make(http.Header)
headers.Add("Authorization", "Bearer " + token)
headers.Add("token_type", "bearer")
headers.Add("access_token", token)
headers.Add("token", token)
headers.Add("Authentication", token)

//  "github.com/gorilla/websocket"
ws, _, err := websocket.DefaultDialer.Dial(url, headers)

Most of the code is same as in 2nd link mentioned above except trying for wss (not ws).

I guess I am missing something in header. Any idea? Thx

Expected Behavior: Should be able to send requests (like above) and get responses successfully.

Answer 1

From the godoc for DialContext, which I realize you are just using dial, but it applies. Emphasis mine

https://godoc.org/github.com/gorilla/websocket#Dialer.DialContext

If the WebSocket handshake fails, ErrBadHandshake is returned along with a non-nil *http.Response so that callers can handle redirects, authentication, etcetera. The response body may not contain the entire response and does not need to be closed by the application.

Please try not discarding the response so you can inspect it to determine how to fix the problem.

As a general rule, if something isn't working out, and you are ignoring some return value, check and see what you are ignoring and you'll often find the solution.

Let me know if this helps or not and I can update/delete the answer.