Serving files & handling requests with Webrick on same port - ruby

Question

Hi I have a need to be able to receive requests from GitLab (body => JSON) as well as serve files on same port. I am trying to use Webrick for this purpose. I can do these separately.
To serve files I do:
server = WEBrick::HTTPServer.new(:Port => 3030, :DocumentRoot => '/')
server.start
To receive and process jSON I do:
server = WEBrick::HTTPServer.new(:Port => 3030, :DocumentRoot => '/')
server.mount_proc '/' do | req, res |
Queue.new(req.body)
end
But I need this functionality combined, is there a way to do this with Webrick?

Answer 1

Yes, this is certainly possible with Webrick or any HTTP server. There will be two different HTTP actions depending on what the users wants to do, 1.) a GET request to serve the files or 2.) a POST request to process some JSON.
Here's a simple example to show you how to do both:
class Server < WEBrick::HTTPServlet::AbstractServlet
def do_GET (request, response)
puts "this is a get request"
end
def do_POST (request, response)
puts "this is a post request who received #{request.body}"
end
end
server = WEBrick::HTTPServer.new(:Port => 3030)
server.mount "/", Server
trap("INT") {
server.shutdown
}
server.start
Once that is running you can test this by doing the following in a separate terminal window:
curl localhost:3030
output:
this is a get request
localhost - - [23/Apr/2015:06:39:20 EDT] "GET / HTTP/1.1" 200 0
- -> /
To test the POST request:
curl -d "{\"json\":\"payload\"}" localhost:3030
output:
this is a post request who received {"json":"payload"}
localhost - - [23/Apr/2015:06:40:07 EDT] "POST / HTTP/1.1" 200 0
- -> /

Answer 2

Since you mentioned the purpose was a light code-base, here's a light, fast script using the Plezi framework...
This will allow for easier testing, I think (but I'm biased). Also, Plezi is faster on my machine then Webrick (although it's a pure ruby framework, no rack or 'c' extensions involved).
require 'plezi'
class MyController
def index
# parsed JSON is acceible via the params Hash i.e. params[:foo]
# raw JSON request is acceible via request[:body]
# returned response can be set by returning a string...
"The request's params (parsed):\n#{params}\n\nThe raw body:\n#{request[:body]}"
end
end
# start to listen and set the root path for serving files.
listen root: './'
# set a catch-all route so that MyController#index is always called.
route '*', MyController
(if you're running the script from the terminal, remember to exit irb using the exit command - this will activate the web server)