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SOLVED

EventSource - Working polyfill

EventSource - Working polyfill

AndreasL
New Contributor

I'm trying to create a subscribtion to monitor nodes via javascript using the /event endpoint in the datalayer rest interface.

The problem is that the /automation/api/v2/events/subID GET requires authorization headers and that is not supported in any browser

https://developer.mozilla.org/en-US/docs/Web/API/EventSource

So i googled for a polyfill that suppors it and found this one;

https://github.com/Yaffle/EventSource

The problem is that using this never returns any messages. It does recieve data continously (the size increases) so so far it does work.

AndreasL_0-1656318044696.png

Does anyone have a working example using this?

/Andreas

 

2 REPLIES 2

jochen-scheib
Established Member

Hi Andreas,

can you replace

 

    es.addEventListener("message", listener);

 

with

 

    es.addEventListener("update", listener);

 

That should do the trick.

Subscription event updateSubscription event update

Best regards

Jochen

Attached the working example.

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