Two small modifications (MessageEvent object + retry field handling)

[xfra35]

Hi, I've tested EventSource.js in IE7/8/9 and it works great. Thanks for your work !

I slightly modified the code as follows :

• addition of the "type" property to the MessageEvent object
• handling of "retry" field name

(tested in IE7/8/9)

[remy]

The event.type looks good, but the interval isn't quite right. Note that the way this eventsource implementation works is that when the data comes in, the connection is dropped, so it has to automatically reestablish the connection. This should be pretty much right away.

Also the interval value shouldn't be available in the eventsource object as it's internal to our polyfill and shouldn't be exposed to the developer.

My gut feeling is the interval retry should be used here https://github.com/xfra35/polyfills/blob/18c85ae81ca905c2fa8255d9f4fff94b31a791d2/EventSource.js#L96 - but definitely needs testing with a server that maybe gets shutdown to test the retry backoff.

[xfra35]

"Also the interval value shouldn't be available in the eventsource object as it's internal to our polyfill and shouldn't be exposed to the developer." >> you're totally right. I didn't think about that aspect.

I just moved it back as originally (interval variable) and updated the "retry" line accordingly. I made a test with a server shutdown. It kept on trying every 2s (my retry value) and retrieved the connection correctly when the server went back up.

Concerning the default polling interval, don't you think 500ms is too short ? I've read somewhere that the usual default polling value is 3000ms although I can't find that value in the w3c specs.