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Return helpful error if client code targets wrong SignalR Hub proxy generation endpoint #1181

rustd opened this Issue · 2 comments

2 participants


I had an incorrect script reference to:

<script src="/signalr/hub"></script>

Notice the missing 's' for "hub". This generated an HTTP 500 from the server. If I make the request directly in the browser, I get:

[InvalidOperationException: Protocol error: Unknown transport.]

Could we somehow provide a helpful error message here indicating the user has simply made a mistake in their script reference?


We can't assume the http request came from a script reference.


We need to think about more scenarios like this and ways that we can provide better error messages.

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