'WebSockets Server .NET Core - IsWebSocketRequest always returns false

I'm using what I consider some fairly "standard" code in .NET Core to implement a web socket server:

if (ctx.Request.Path == "/api/v1/sometest")
    {
        if (ctx.WebSockets.IsWebSocketRequest)
        {
            WebSocket wsSock = await ctx.WebSockets.AcceptWebSocketAsync();

But I can never establish a session because IsWebSocketRequest is always null.

I can see the Connection: Upgrade and Upgrade: websocket headers...

I know I must be missing something but unsure what... Scanned through github dotnet source code to see if I could figure it out that way but no luck finding a solution yet.

I'm using Windows 10 Kestrel VS Code .NET Core 3.1

Solution 1:^[1]

I had AddWebSockets in Startup.ConfigureServices BUT I forgot to also include the middleware in Startup.Configure. Call app.UseWebSockets here to register the middleware in your chain.

Solution 2:^[2]

According to this link app.UseWebSockets() should be placed right before app.UseEndpoints() in startup.cs .

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	James Scott
Solution 2	AmirHossein Rezaei

'WebSockets Server .NET Core - IsWebSocketRequest always returns false

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]