Debugging

app/controllers/submissions_controller.rb

@@ -72,15 +72,23 @@ class SubmissionsController < ApplicationController
     with_server_sent_events do |server_sent_event|
       container_info_sent = false
       stderr = ''
-      output = @docker_client.execute_run_command(@submission, params[:filename]) do |stream, chunk|
+      output = @docker_client.execute_run_command(@submission, params[:filename])
-        unless container_info_sent
+      if output
-          server_sent_event.write({id: @docker_client.container.try(:id), port_bindings: @docker_client.container.try(:port_bindings)}, event: 'info')
+        server_sent_event.write({stdout: output[:stdout]}, event: 'output')
-          container_info_sent = true
+        server_sent_event.write({stderr: output[:stderr]}, event: 'output')
-        end
+        output[:status] = :ok if output[:status] == 0
-        server_sent_event.write({stream => chunk}, event: 'output')
+        server_sent_event.write({status: output[:status]}, event: 'status')
-        stderr += chunk if stream == :stderr
       end
-      server_sent_event.write(output, event: 'status')
+      #server_sent_event.write({stdout: output[:output][2], event: 'status')
+      # do |stream, chunk|
+      #   unless container_info_sent
+      #     server_sent_event.write({id: @docker_client.container.try(:id), port_bindings: @docker_client.container.try(:port_bindings)}, event: 'info')
+      #     container_info_sent = true
+      #   end
+      #   server_sent_event.write({stream => chunk}, event: 'output')
+      #   stderr += chunk if stream == :stderr
+      # end
+      # server_sent_event.write(output, event: 'status')
       if stderr.present?
         if hint = Whistleblower.new(execution_environment: @submission.execution_environment).generate_hint(stderr)
           server_sent_event.write(hint, event: 'hint')

lib/docker_client.rb

@@ -176,34 +176,35 @@ class DockerClient
 
   def send_command(command, container, &block)
     Timeout.timeout(@execution_environment.permitted_execution_time.to_i) do
-      stderr = []
+      output = container.exec(['bash', '-c', command])
-      stdout = []
+      #do |stream, chunk|
-      container.exec(['bash', '-c', command]) do |stream, chunk|
+      #  block.call(stream, chunk) if block_given? #this may issue
-        block.call(stream, chunk) if block_given?
+      #  if stream == :stderr
-        if stream == :stderr
+      ##    stderr.push(chunk)
-          stderr.push(chunk)
+      #  else
-        else
+      #    stdout.push(chunk)
-          stdout.push(chunk)
+      #  end
-        end
+      #end
-      end
+      Rails.logger.info output
-      {status: :ok, stderr: stderr.join, stdout: stdout.join}
+      {status: output[2], stderr: output[1].join, stdout: output[0].join}
     end
   rescue Timeout::Error
+    timeout_occured = true
     Rails.logger.info('got timeout error for container ' + container.to_s)
     #container.restart if RECYCLE_CONTAINERS
     DockerContainerPool.remove_from_all_containers(container, @execution_environment)
 
     # destroy container
-    destroy_container(container)
+    self.class.destroy_container(container)
 
     if(RECYCLE_CONTAINERS)
       # create new container and add it to @all_containers. will be added to @containers on return_container
-      container = create_container(@execution_environment)
+      container = self.class.create_container(@execution_environment)
       DockerContainerPool.add_to_all_containers(container, @execution_environment)
     end
-    {status: :timeout}
+    {status: :timeout,  stderr: '', stdout: ''}
   ensure
-    Rails.logger.info('after timeout error ensuring for' + container.to_s)
+    Rails.logger.info('send_command ensuring for' + container.to_s)
     RECYCLE_CONTAINERS ? return_container(container) : self.class.destroy_container(container)
   end
   private :send_command