Daemonizing about httpuv HOT 6 CLOSED

I'll look into it, thanks for the suggestion.

from httpuv.

I'm not too familiar with libuv, but I'd be happy to help if you point me in the general direction :-)

from httpuv.

That would be fantastic. How would this work with R's single thread limitation? It seems to me you either need to block or fork the R session to be able to serve a request?

from httpuv.

There is a mechanism by which R will call your code back occasionally to let you do work, called addInputHandler. I'm not sure how well documented it is, but if you look in the R source you can see how it works (Rhttpd uses it). Essentially you will get called back on the main thread once in a while.

Sadly this isn't available on Windows, so on that platform you need to create a hidden window on the main thread, then launch a second thread to monitor your events with; when an event is ready to be handled then you post a message onto the hidden window, and that window's window procedure will process the events.

It's all a little hairy but can and has been done before.

from httpuv.

'addInputHandler' is what the websockets library used in unix. So, one
option is to go the sam route and only support this on unix. Would that
make sense as a start?

On Wed, May 8, 2013 at 8:20 PM, Joe Cheng [email protected] wrote:

There is a mechanism by which R will call your code back occasionally to
let you do work, called addInputHandler. I'm not sure how well documented
it is, but if you look in the R source you can see how it works (Rhttpd
uses it). Essentially you will get called back on the main thread once in a
while.

Sadly this isn't available on Windows, so on that platform you need to
create a hidden window on the main thread, then launch a second thread to
monitor your events with; when an event is ready to be handled then you
post a message onto the hidden window, and that window's window procedure
will process the events.

It's all a little hairy but can and has been done before.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/1#issuecomment-17642369
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from httpuv.

I would recommend to imitate as closely as possible what Rhttpd is doing. The undocumented parts of R often get breaking changes between versions, with no warnings from R-core. The last thing you want is everything breaking down in a future version of R due to some internal changes.

from httpuv.