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SignalR integration in microservice architecture. #4365

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imranStem created

I have integrated the singalr in administration microservice.

private hubConnection: signalR.HubConnection
  public startConnection = () => {
    this.hubConnection = new signalR.HubConnectionBuilder()

                            console.log(this.hubConnection, 'hub connection');
      .then(() => console.log('Connection started'))
      .catch(err => console.log('Error while starting connection: ' + err));

      this.hubConnection.on('BroadcastMessage', (data) => {


I have put the above code in the appcomponent.ts file. The above code is working fine and when I send the signal from the administration microservice, I receive the message on "BroadcastMessage". I have used the administration service URL "https://localhost:44367".

Now I don't want to use the administration service URL, I want to use the gateway URL https://localhost:44325 so I configured the ocelot.json file as below.

      "ServiceKey": "Administration Service",
      "DownstreamPathTemplate": "/signalr-hubs/{everything}",
      "DownstreamScheme": "https",
      "DownstreamHostAndPorts": [
          "Host": "localhost",
          "Port": 44367
      "UpstreamPathTemplate": "/signalr-hubs/{everything}",
      "UpstreamHttpMethod": [ "Put", "Delete", "Get", "Post" ]
      "DownstreamPathTemplate": "/ws",
      "UpstreamPathTemplate": "/",
      "DownstreamScheme": "ws",
      "DownstreamHostAndPorts": [
          "Host": "localhost",
          "Port": 44367

When I use the above code, I am getting the below error in console.

[2023-01-17T11:47:29.510Z] Information: WebSocket connected to wss://localhost:44325/signalr-hubs/change-detection?id=Oiwz6joKZs_dxyeYKdUsHg.
Utils.js:141 [2023-01-17T11:47:29.513Z] Error: Connection disconnected with error 'Error: Server returned handshake error: Handshake was canceled.'.
log @ Utils.js:141
_stopConnection @ HttpConnection.js:396
transport.onclose @ HttpConnection.js:334
_close @ WebSocketTransport.js:144
webSocket.onmessage @ WebSocketTransport.js:84
wrapFn @ zone.js:766
invokeTask @ zone.js:406
onInvokeTask @ core.mjs:26218
invokeTask @ zone.js:405
runTask @ zone.js:178
invokeTask @ zone.js:487
invokeTask @ zone.js:1661
globalCallback @ zone.js:1692
globalZoneAwareCallback @ zone.js:1725
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app.component.ts:22 Error while starting connection: Error: Server returned handshake error: Handshake was canceled.

If I integrated the singalr into the web gateway then I am getting the ocelot configuration not found error.

This is the administration service log

[administration-service_786370b9-c]: [17:17:09 INF] Request starting HTTP/1.1 POST https://localhost:44367/signalr-hubs/change-detection/negotiate?negotiateVersion=1 - 0
[administration-service_786370b9-c]: [17:17:09 INF] CORS policy execution successful.
[administration-service_786370b9-c]: [17:17:09 INF] Executing endpoint '/signalr-hubs/change-detection/negotiate'
[administration-service_786370b9-c]: [17:17:09 INF] Executed endpoint '/signalr-hubs/change-detection/negotiate'
[administration-service_786370b9-c]: [17:17:09 INF] Request finished HTTP/1.1 POST https://localhost:44367/signalr-hubs/change-detection/negotiate?negotiateVersion=1 - 0 - 200 316 application/json 1.8707ms
[administration-service_786370b9-c]: [17:17:09 INF] Request starting HTTP/1.1 GET https://localhost:44367/signalr-hubs/change-detection?id=Oiwz6joKZs_dxyeYKdUsHg - 0
[administration-service_786370b9-c]: [17:17:09 INF] CORS policy execution successful.
[administration-service_786370b9-c]: [17:17:09 INF] Executing endpoint '/signalr-hubs/change-detection'
[administration-service_786370b9-c]: [17:17:29 INF] Executed endpoint '/signalr-hubs/change-detection'
[administration-service_786370b9-c]: [17:17:29 INF] Request finished HTTP/1.1 GET https://localhost:44367/signalr-hubs/change-detection?id=Oiwz6joKZs_dxyeYKdUsHg - 0 - 101 - - 20029.8655ms

This is the web gateway log:

[web-gateway_8b434f23-f]: [17:17:29 DBG] requestId: 0HMNOG1S5794U:00000002, previousRequestId: no previous request id, message: ocelot pipeline finished
[web-gateway_8b434f23-f]: [17:17:29 INF] Request finished HTTP/1.1 GET https://localhost:44325/signalr-hubs/change-detection?id=Oiwz6joKZs_dxyeYKdUsHg - - - 101 42 - 20035.4048ms
  • ABP Framework version: v6.0.0
  • UI type: Angular
  • DB provider: EF Core
  • Tiered (MVC) or Identity Server Separated (Angular): yes
  • Exception message and stack trace:
  • Steps to reproduce the issue:"

3 Answer(s)
  • User Avatar
    gterdem created
    Support Team

    Can you check if it’s working for you?

  • User Avatar
    imranStem created

    I have checked the above code. Its negotiate two times with different connection id and getting response No connection with that ID.

  • User Avatar
    gterdem created
    Support Team

    Can you check if your gateway has websocket configuration as in the ocelot documentation in the OnApplicationInitialization method like:

Made with ❤️ on ABP v8.2.0 Updated on February 19, 2024, 12:29