Add an ETag header

[radekmie]

What do you think about serving an ETag header? It's not a big deal, but it can reduce the server load a bit, because browser can cache responses. It's kind of more important now, as Meteor have a cleaner way to SSR.

It'll probably be fairly easy: just use etag (express is using it) in the webapp/webapp_server.js, right before res.end().

[hwillson]

This should already be supported for static files @radekmie - see https://github.com/meteor/meteor/blob/0d7ce023e0902094305960fd5d1268e21702a9f3/packages/webapp/webapp_server.js#L458. Is something not working properly?

[hwillson]

Unless you mean generate and set an etag for every response (so not just static files). That isn't currently supported, and might be nice to add.

[radekmie]

Yes, I know that. I meant every response. At least the HTML.

[radekmie]

It’s already possible. Great!