Ocelot 16.0.1 routing failed when SignalR during WebSocket handshake

[xingwen1987]

Steps to Reproduce the Problem

1.Use the recommended configuration of SignalR in the official document

2.Make sure the SignalR server is available



3.Switch Url to Ocelot's route for SignalR, the following exception occurred

• Version:16.0.1
• Platform:.Net Core 3.1

[ssulleyymmann]

hi,
I am using service discovery, consul and signalr.
I have same problem. Is there any improvement, update or suggest?

[jlukawska]

UnableToFindDownstreamRouteError when using 16.0.1 version is often caused by "ReRoutes" word in ocelon.json file. The 16.0.1 version requires the word "Routes".

[ssulleyymmann]

hi jlukawska,

I'm already using it as "routes" but it doesn't work.

signalr js =>
const connection = new signalR.HubConnectionBuilder()
.withUrl("http://localhost:5000/socket/xhub", {
skipNegotiation: true,
transport: signalR.HttpTransportType.WebSockets
})
.configureLogging(signalR.LogLevel.Trace)
.build();

startup.cs
public void ConfigureServices(IServiceCollection services)
{
services
.AddOcelot(Configuration)
.AddConsul()
.AddConfigStoredInConsul();

        services.AddSwaggerForOcelot(Configuration);
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseWebSockets();
        app.UseOcelot().Wait();
    }

ocelot cong =>
"Routes": [
{
"DownstreamPathTemplate": "/xhub",
"DownstreamScheme": "http",
"ServiceName": "x.socket",
"SwaggerKey": "x.api.socket",
"UpstreamPathTemplate": "/socket/xhub",
"UpstreamHttpMethod": [ "GET", "POST", "PUT", "DELETE", "OPTIONS" ],
"LoadBalancerOptions": {
"Type": "LeastConnection"
}
}
]

browser consol =>
[2020-09-30T08:30:51.216Z] Debug: Starting HubConnection.
Utils.ts:178 [2020-09-30T08:30:51.217Z] Debug: Starting connection with transfer format 'Text'.
Utils.ts:178 [2020-09-30T08:30:51.218Z] Trace: (WebSockets transport) Connecting.
WebSocketTransport.ts:64 WebSocket connection to 'ws://localhost:5000/socket/xhub' failed: Error during WebSocket handshake: Unexpected response code: 500
(anonymous) @ WebSocketTransport.ts:64
Utils.ts:168 [2020-09-30T08:30:51.318Z] Error: Failed to start the connection: Error: There was an error with the transport.
Utils.ts:178 [2020-09-30T08:30:51.319Z] Debug: HubConnection failed to start successfully because of error 'Error: There was an error with the transport.'.
x.js:60 Error: There was an error with the transport.
at WebSocket.webSocket.onerror (WebSocketTransport.ts:85)

[xingwen1987]

hi jlukawska,

I'm already using it as "routes" but it doesn't work.

signalr js =>
const connection = new signalR.HubConnectionBuilder()
.withUrl("http://localhost:5000/socket/xhub", {
skipNegotiation: true,
transport: signalR.HttpTransportType.WebSockets
})
.configureLogging(signalR.LogLevel.Trace)
.build();

startup.cs
public void ConfigureServices(IServiceCollection services)
{
services
.AddOcelot(Configuration)
.AddConsul()
.AddConfigStoredInConsul();

        services.AddSwaggerForOcelot(Configuration);
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseWebSockets();
        app.UseOcelot().Wait();
    }

ocelot cong =>
"Routes": [
{
"DownstreamPathTemplate": "/xhub",
"DownstreamScheme": "http",
"ServiceName": "x.socket",
"SwaggerKey": "x.api.socket",
"UpstreamPathTemplate": "/socket/xhub",
"UpstreamHttpMethod": [ "GET", "POST", "PUT", "DELETE", "OPTIONS" ],
"LoadBalancerOptions": {
"Type": "LeastConnection"
}
}
]

browser consol =>
[2020-09-30T08:30:51.216Z] Debug: Starting HubConnection.
Utils.ts:178 [2020-09-30T08:30:51.217Z] Debug: Starting connection with transfer format 'Text'.
Utils.ts:178 [2020-09-30T08:30:51.218Z] Trace: (WebSockets transport) Connecting.
WebSocketTransport.ts:64 WebSocket connection to 'ws://localhost:5000/socket/xhub' failed: Error during WebSocket handshake: Unexpected response code: 500
(anonymous) @ WebSocketTransport.ts:64
Utils.ts:168 [2020-09-30T08:30:51.318Z] Error: Failed to start the connection: Error: There was an error with the transport.
Utils.ts:178 [2020-09-30T08:30:51.319Z] Debug: HubConnection failed to start successfully because of error 'Error: There was an error with the transport.'.
x.js:60 Error: There was an error with the transport.
at WebSocket.webSocket.onerror (WebSocketTransport.ts:85)

dotnet/aspnetcore#10440

this issue give me some idea, in localhost, ocelot works fine, but in docker, route match faild

this is my new issue

#1364

[raman-m]

Hi @xingwen1987 !

Version: 16.0.1
Platform: .NET Core 3.1

I guess such spec is outdated during this 2023 year.
Could you upgrade your solution to .net7 and v19.0.2 please?
And let us know the current behavior of the bug please! 🙏

---

Another question

this is my new issue
#1364

Thanks for creation new user scenario!
But Is 1364 a duplicate of this 1283 issue?
I see they are both related to SignarR problems, right?
Are you sure they are different root cause issues?

[raman-m]

Outdated issue ❗