I'm implementing a server side event client in JavaScript, using EventSource. Messages sent by the backend never reached the frontend until I realized that my antivirus blocks them. As soon as I turned it off, the events started to work as expected and the messages arrived.
While of course I can disable this obnoxious busybody of a bugware on own my computer, but I can't ask my users to do the same. Also, it seems that Windows Security is blocking EventSource traffic too.
A lot of websites are using EventSource though, and they don't seem to be blocked. What's the secret?
What I'm trying to do is to give feedback to the frontend about a long conversion process running on the server. If you have a better idea than EventSource, please tell.
Update: Here's a working example of SSE: https://www.w3schools.com/html/tryit.asp?filename=tryhtml5_sse
This works in my browser. But if I replace the event source with my own API, it fails again.
from Server side events blocked by antivirus
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