Add basic support for presetting custom files in sandbox.

app/controllers/submissions_controller.rb

@@ -119,9 +119,12 @@ def submission_params
       :enable_per_process_and_thread_memory_limit,
       :max_file_size,
       :redirect_stderr_to_stdout,
-      :callback_url
+      :callback_url,
+      :archive
     )
 
+    submission_params[:archive] = Base64Service.decode(submission_params[:archive])
+
     params[:base64_encoded] == "true" ? decode_params(submission_params) : submission_params
   end
 

app/jobs/isolate_job.rb

@@ -5,10 +5,12 @@ class IsolateJob < ApplicationJob
   STDOUT_FILE_NAME = "stdout.txt"
   STDERR_FILE_NAME = "stderr.txt"
   METADATA_FILE_NAME = "metadata.txt"
+  ARCHIVE_FILE_NAME = "archive.zip"
 
   attr_reader :submission, :cgroups,
               :box_id, :workdir, :boxdir, :tmpdir,
-              :source_file, :stdin_file, :stdout_file, :stderr_file, :metadata_file
+              :source_file, :stdin_file, :stdout_file,
+              :stderr_file, :metadata_file, :archive_file
 
   def perform(submission)
     @submission = submission
@@ -58,13 +60,20 @@ def initialize_workdir
     @stdout_file = workdir + "/" + STDOUT_FILE_NAME
     @stderr_file = workdir + "/" + STDERR_FILE_NAME
     @metadata_file = workdir + "/" + METADATA_FILE_NAME
+    @archive_file = boxdir + "/" + ARCHIVE_FILE_NAME
 
     [stdin_file, stdout_file, stderr_file, metadata_file].each do |f|
       initialize_file(f)
     end
 
     File.open(source_file, "wb") { |f| f.write(submission.source_code) }
     File.open(stdin_file, "wb") { |f| f.write(submission.stdin) }
+
+    if submission.archive?
+      File.open(archive_file, "wb") { |f| f.write(submission.archive) }
+      `cd #{boxdir} && timeout -s 15 -k 1s 2s unzip -n -qq #{archive_file} 2>&1`
+      File.delete(archive_file)
+    end
   end
 
   def initialize_file(file)

app/serializers/submission_serializer.rb

@@ -55,6 +55,10 @@ def language
     ActiveModelSerializers::SerializableResource.new(object.language, { serializer: LanguageSerializer, fields: [:id, :name] })
   end
 
+  def archive
+    Base64Service.encode(object.archive)
+  end
+
   private
 
   def object_decoder(method)

db/migrate/20200115205044_add_archive_to_submissions.rb

@@ -0,0 +1,5 @@
+class AddArchiveToSubmissions < ActiveRecord::Migration[5.0]
+  def change
+    add_column :submissions, :archive, :binary
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20200114220437) do
+ActiveRecord::Schema.define(version: 20200115205044) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -55,6 +55,7 @@
     t.string   "command_line_arguments"
     t.boolean  "redirect_stderr_to_stdout"
     t.string   "callback_url"
+    t.binary   "archive"
     t.index ["token"], name: "index_submissions_on_token", using: :btree
   end