Channels: Server-Sent Events

[AstraLuma]

Server-Sent Events are kind of the less sexy little cousin to WebSockets. They support a much simpler protocol (no negotiation!) but only do asynchronous server->client.

Could Server Sent Events be added to the channels stack?

[flo-dhalluin]

You can easily do SSE on top of channels. It's about setting content-type to text/event-stream and format correctly the streaming response. I have written a little library implementation on top of channels, last weekend: it's just a matter of cleanup /writing the doc before publishing...

Le 18 avril 2016 16:36:18 GMT+02:00, Jamie Bliss [email protected] a écrit :

Server-Sent Events are kind of the less sexy little cousin to
WebSockets. They support a much simpler protocol (no negotiation!) but
only do asynchronous server->client.

Could Server Sent Events be added to the channels stack?

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[AstraLuma]

Oh, how fortuitous! Look forward to that.

[andrewgodwin]

(To echo flo above, yes, this is entirely possible, SSEs are just a streamed HTTP response, not a new protocol like WebSockets. Channels should already correctly do streaming responses either in the Django style or natively using http.response messages with the more-data flag set.)

Closing this here as it's something better done in a third party library - feel free to post updates here about progress though.

[flo-dhalluin]

Hey,

I just pushed ssechannels
Did not find a better idea than the decorator based endpoints creation, enables users to not care at all about channels. Pretty untested, probably broken but still proof of concept/example on how to SSE with channels. feedbacks wanted !!

[AstraLuma]

Why is the event name binary but the data a string?

[jkarneges]

And for something Channels 2 compatible, there's django-eventstream.