ruby - Keep page alive while running in background using threads -


my sinatra-based ruby app works fine locally, however, when push cloudfoundry, page times out before app prints results on page (says: "hc.run.company.com took long respond. http error 504). main.rb:

require 'rest-client' require 'sinatra' require 'open-uri' require 'net/http' require 'dir' require 'json' # require 'sinatra/async' # require 'socket'  class devmonit < sinatra::base     # register sinatra::async      @@services = array.new      def self.register(service)         @@services << service     end      '/url/:url'         url = params[:url].to_s # store 'url' parameter         is_verbose = params[:v].to_s # store 'v' parameter      # stream :keep_open |out|     #   print 'out = '  # debug     #   p out # debug     #   check_status(url, is_verbose) |x|     #       out << "x=#{x}"     #       out.close     #  end     # end      return check_status(url, is_verbose)     end      def verbose(is_verbose)         if !is_verbose.nil? && is_verbose == 'true'             return true         else             return false         end     end      def check_status(uri_str, is_verbose, limit = 10)     response = restclient.get "#{uri_str}"          case response.code             when 200...300                 @@services.each |service|                     if service.is_matched?("#{uri_str}")                         tool_name = service.class.name.split('::').last.downcase # fetch name of class tool_name                         @@result = service.check_tool_specific("#{tool_name}","#{uri_str}", "#{verbose(is_verbose)}")                     end                 end                  if @@result.nil?                     return 'no results, went wrong!'                 end                  return "#{@@result.to_json}"        when net::httpredirection                 location = response['location']                 check_status(location, limit - 1)             else                 puts "it doesn't work!"                 puts "#{response.code}"     end   rescue socketerror => e; #do e.message     return {         :url => uri_str,         :timestamp => time.now.strftime('%y-%m-%d %t'),         :results => 'cannot resolve hostname'     }     end     run! if app_file == $0 end

i trying have thread feeds browser keep alive (http code 200?) while it's executing return check_status(url, is_verbose) or @ if service.is_matched?("#{uri_str}"). reason why trying because app triggers jenkins job , waits finish app takes necessary information puts in json format (which output), outputs return "#{@@result.to_json}".

i've been reading on how but, can't make work, (i've tried doing sockets , failed miserably, tried doing this , didn't work either).

any kind of guidance appreciated.

update:

this code takes longest time (waits jenkins job finish pull required information):

# require 'em-http-request'  class waitforjob   def self.job(current_build_json, last_build_json, start_job)     job_result_hash = hash.new{|hsh,key| hsh[key] = {} } # initialize hash storing results     start_job.send_request # start jenkins job     get_current_build_number = checkjson.get_from_json("#{current_build_json.send_request}", 'nextbuildnumber') # fetch nextbuildnumber job starts (as doesn't increment while it's in queue); nextbuildnumber going currentbuildnumber     current_build_number = get_current_build_number.to_i # save nextbuildnumber separate variable comparison     get_last_build_number = checkjson.get_from_json("#{last_build_json.send_request}", 'number')     get_last_build_duration = checkjson.get_from_json("#{last_build_json.send_request}", 'duration')     get_last_build_result = nil     loop       timeout::timeout(120)         # em.run           sleep(5) # debug           get_last_build_number = checkjson.get_from_json("#{last_build_json.send_request}", 'number')           get_last_build_result = checkjson.get_from_json("#{last_build_json.send_request}", 'result')           get_last_build_duration = checkjson.get_from_json("#{last_build_json.send_request}", 'duration')            # conn = em::httprequest.new('http://localhost:9000/')           # start = time.now            # r1 = conn.get :query => {delay: 1.5}, :keepalive => true           # r2 = conn.get :query => {delay: 1.0}            # r2.callback           #   p time.now - start # =>  1.5 - keep-alive + pipelining           #   em.stop           # end         # end       end       break if !get_last_build_result.nil? && !get_last_build_duration.zero? && (current_build_number == get_last_build_number) # end loop when job done     end      job_name = "#{checkjson.get_from_json("#{last_build_json.send_request}", 'fulldisplayname')}" # fetch job's name     job_name = job_name.split(/ |\./) # splits job_name using '.' , ' ' delimiters      job_result_hash['job_type'] = "#{job_name[3]}" # takes last part of jenkins job name (ex: dev.eng-paas.devtools.testing_integration_job)     job_result_hash['build_number'] = "#{current_build_number}" # return build number can used in different situations     job_result_hash['job_duration'] = "#{checkjson.get_from_json("#{last_build_json.send_request}", 'duration')}" # fetches duration of job     job_result_hash['job_result'] = "#{checkjson.get_from_json("#{last_build_json.send_request}", 'result').downcase}" # fetches if job successful/unstable/failure     return job_result_hash   end end


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