when i setup subscription endpoint(websocket connection) in my gqlgen + go code, it display an error as unable to upgrade *http.response to websocket websocket: request origin not allowed by Upgrader.CheckOrigin:

[melkamu-zinabu]

when i try to start websocket connection from frontend code,it display an error as unable to upgrade *http.response to websocket websocket: request origin not allowed by Upgrader.CheckOrigin in the server side to fix it i update the package but it still persist

• go version?

• // Create the GraphQL server srv := handler.NewDefaultServer(graph.NewExecutableSchema(graph.Config{ Resolvers: resolver, })) srv.AddTransport(&transport.Websocket{ Upgrader: websocket.Upgrader{

  	CheckOrigin: func(r *http.Request) bool {
  		// Replace "http://example.com" with the allowed origin
  		allowedOrigin := "http://localhost:5173/"
  		return r.Header.Get("Origin") == allowedOrigin
  	},
  },
  

  })

[melkamu-zinabu]

please help me

[suryatresna]

I've got the same issue. My problem was solved with the change using New instead of NewDefaultServer

something like this

srv := handler.New(graph.NewExecutableSchema(graph.Config{
Resolvers: resolver,
}))

If you use NewDefaultServer https://github.com/99designs/gqlgen/blob/master/graphql/handler/server.go#L35-L37, that can't override because WebSocket already initialize

[aleksey-korolev]

Origin header may be different or even missing depending on your frontend environment e.g. browser vs Postman client vs etc etc. You may have a look at default implementation of CheckOrigin to get better understanding how you'd like to customise this check: https://github.com/gorilla/websocket/blob/5e002381133d322c5f1305d171f3bdd07decf229/server.go#L87