Websocket with .Net core application in SignalR + Kestrel

[Antonio Gomes Rodrigues]

Hi,

I have something strange that I don't success to find a solution

I have try the plugin with echo.websocket.org without problem

But when I try our application, I have this error

2019-02-22 16:48:59,861 DEBUG e.l.w.WebSocketClient: Creating connection with tdc-lifemap-platform.svc.interne-groupe-seloger.com:80 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> GET /hub/pushpin?id=mpC8qj0LR2E_3VfayawDzw HTTP/1.1 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> Host: *:80 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> Origin: http://* 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> Cache-Control: no-cache 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> Accept: text/html,application/xhtml+xm…ml;q=0.9,image/webp,/;q=0.8 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36 2019-02-22 16:48:59,866 DEBUG e.l.w.WebSocketClient: >> Accept-Encoding: gzip, deflate 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Accept-Language: fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Pragma: no-cache 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Upgrade: websocket 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Connection: Upgrade 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Sec-WebSocket-Key: /t7DlRHshIYIh4zFFLnvzg== 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> Sec-WebSocket-Version: 13 2019-02-22 16:48:59,867 DEBUG e.l.w.WebSocketClient: >> 2019-02-22 16:48:59,870 DEBUG e.l.w.WebSocketClient: << HTTP/1.1 503 Service Unavailable 2019-02-22 16:48:59,870 DEBUG e.l.j.w.OpenWebSocketSampler: Http upgrade error in sampler 'WebSocket Open Connection'. eu.luminis.websocket.HttpUpgradeException: Http Upgrade failed with status code 503 at eu.luminis.websocket.WebSocketClient.checkHttpStatus(WebSocketClient.java:510) ~[jmeter-websocket-samplers-1.2.1.jar:?] at eu.luminis.websocket.WebSocketClient.checkServerResponse(WebSocketClient.java:460) ~[jmeter-websocket-samplers-1.2.1.jar:?] at eu.luminis.websocket.WebSocketClient.connect(WebSocketClient.java:186) ~[jmeter-websocket-samplers-1.2.1.jar:?] at eu.luminis.websocket.WebSocketClient.connect(WebSocketClient.java:104) ~[jmeter-websocket-samplers-1.2.1.jar:?] at eu.luminis.jmeter.wssampler.WebsocketSampler.sample(WebsocketSampler.java:159) [jmeter-websocket-samplers-1.2.1.jar:?] at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:622) [ApacheJMeter_core.jar:r1853323] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:546) [ApacheJMeter_core.jar:r1853323] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486) [ApacheJMeter_core.jar:r1853323] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253) [ApacheJMeter_core.jar:r1853323] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]

The application work fine with Chrome or Firefox

I have check all the header and I have the same with JMeter

Is anybody have successfully tested an .Net core application in SignalR + Kestrel? Can you help me?

Thanks Antonio

[Peter Doornbosch]

Hi Antonio,

Did you edit the logs show above? The Host and Origin header show a "*" as hostname, this should not be possible.

Your server is sending a HTTP 503 status code, see https://httpstatuses.com/503. You should check the server logs to find out why it sends a 503.

If you can't find it, the best advice i can give is to capture a session with wireshark while your browser is creating the websocket connection. May be that capture reveals an additional header that is required by your server.

Hth. Regards Peter