Websockets and Shiny Apps

[Christopher Wilson]

Is there any way to have a Shiny app that can be dynamically updated via an external websocket connection.  For example, if I have a device monitor that's pushing some counter over a websocket (or to a server that's exporting a websocket connection), is there any way to have a Shiny app connect to that websocket and update a plot?  I see httpuv websocket server, but not much in the way of clients out there.  Thoughts?

Thanks in advance.

-Chris

[Joe Cheng]

There's not currently a usable websocket client library. But how about serving your data over a plain TCP socket? I have an example of that here:
https://github.com/jcheng5/crandash/blob/master/global.R

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[Christopher Wilson]

Thank you, Joe.  I'll have a look at it.

BTW - I have a variety of data sources and have been looking at websocketd (http://websocketd.com/) as a way to quickly prototype fetching data using whatever means necessary (currently HBase/OpenTSDB and 40 lines of Python).  It'd be great if there was a clean way to update Shiny with a websocket library that supported TLS and decent level of auth.  If that ever gets prioritized happy to become a beta tester.

-Chris

[Christopher Wilson]

I wanted to re-ask the question regarding connecting R/Shiny to a websocket?  I've looked at Plotly's streaming API, PubNub, Kafka, and a few others and would like to see if there is work happening in this area?  If so I'd like to help as a tester as I've got a few patterns that require this functionality.

If there's a way to wire up a websocket with JS and connect that to R I'm all ears.

BTW - I found socket approach a little brittle.

-Chris