How can I echo the output from Ruby shell scripts in chunks?

Question

I'm setting up a mini deploy system with Ruby and Sinatra and Shell scripts, and when I trigger a deploy script I'd like ruby to continue to echo the output from the following:

post '/' do
  `/home/deploy/deploy.sh`
end

How can I ensure that Ruby will echo the output and send a chunked response (so that the content can continue to load)?

Thanks!

score 1 · Accepted Answer · edited May 23 '17 at 11:49

1

You have two distinct problems here:

How to stream-receive the output of the command while it is running?
- You want to use IO.popen.
Within Sinatra, how do I stream a response to the user?
- You want to use Sinatra 1.3's stream. (See also this question.)

edited May 23 '17 at 11:49

Community

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answered May 22 '12 at 13:09

Phrogz

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Interesting, I've seen many developers moving from backticks to popen. Thanks for the tip! I wouldn't have found `::Streaming` – crockpotveggies May 22 '12 at 19:07
@DeLongey Sorry, ::Streaming is for binary/file sends. See my updated answer for how to stream response to the browser. – Phrogz May 22 '12 at 19:56
Thanks for the update. I would have found out the hard way ;) – crockpotveggies May 22 '12 at 20:16

How can I echo the output from Ruby shell scripts in chunks?

1 Answers1