NGINX Problem with Configuring Websocket, no problem with SSE - asp.net

Question

i am working with NGINX configuration right now.
I am stuck at some strange point.
NGINX allow me to connect via SSE but not via Websocket.
This is my config:
server {
listen 80;
server_name _;
location / {
proxy_pass http://127.0.0.1:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
This is error from browser console via WEBSOCKET:
[2022-08-30T07:49:22.667Z] Error: Failed to start the transport 'WebSockets': Error: WebSocket failed to connect. The connection could not be found on the server, either the endpoint may not be a SignalR endpoint, the connection ID is not present on the server, or there is a proxy blocking WebSockets. If you have multiple servers check that sticky sessions are enabled.
This is WEBSOCKET: Browser Error
This is SSE: SSE
##EDIT:
This is section which fail:
try {
await this._startTransport(connectUrl, requestedTransferFormat);
this.connectionId = negotiate.connectionId;
return;
}
catch (ex) {
this._logger.log(LogLevel.Error, `Failed to start the transport '${endpoint.transport}': ${ex}`);
negotiate = undefined;
transportExceptions.push(new FailedToStartTransportError(`${endpoint.transport} failed: ${ex}`, HttpTransportType[endpoint.transport]));
if (this._connectionState !== "Connecting" /* Connecting */) {
const message = "Failed to select transport before stop() was called.";
this._logger.log(LogLevel.Debug, message);
return Promise.reject(new Error(message));
}
###UPDATE
I FOUND THE SOLUTION. MY ANSWER IS CORRECT ANSWER! :)

Answer 1

I am comming back with the solution.
It is easy.
First thing is:
You need to add in nginx.conf in http { } section this:
map $http_upgrade $connection_upgrade
{
default upgrade;
'' close;
}
and this is config:
server {
listen 50150;
server_name _;
location / {
proxy_pass http://127.0.0.1:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_cache off;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
and you are good to go!
[2022-08-30T10:30:48.900Z] Information: WebSocket connected to ws:~~/~hub?id=Zk-~~.
I hope someone will get use of it.
Best regards