Judge0 API v1.6.0

v1.6.0 (2020-05-01)

New Features

• Added support for automatically redirecting stderr to stdout of the running program with the configuration flag redirect_stderr_to_stdout. Added configuration variable REDIRECT_STDERR_TO_STDOUT that can be used for setting default behaviour for every submission.
  • Commits: @8e6617aa
• Added configuration variable DISALLOW_ORIGIN that can be used for disabling CORS only for specific origins.
  • Commits: @f61b5496 @a927c9db
• Added configuration variables ALLOW_IP and DISALLOW_IP that can be used for allowing/disallowing only specific IP addresses that can use instance of Judge0 API.
  • Commits: @4fd0f34b
• Added support for built in maintenance mode that can be enabled with configuration variables MAINTENANCE_MODE and MAINTENANCE_MESSAGE. In maintenance mode clients cannot create or delete submissions i.e. they cannot create new database changes.
  • Commits: @201221e2
• Added support for universal field * which returns all attributes of a submission.
  • Commits: @521cc2e2
• Added route GET /statistics which returns some basic and useful information about Judge0 API instance. Statistic report is cached for 10 minutes.
  • Commits: @a24db632 @621c50f1 @eead8067
• Added basic support for callbacks which are called with HTTP verb PUT.
  • Pull Requests: #98
  • Issues: #33
  • Commits: @41e846b1
• Added support for presetting custom additional files in a sandbox.
  • Issues: #32 #88
  • Commits: @7829db87 @6d1f4293 @6573c52f
• Added routes GET /submissions/batch and POST /submissions/batch batch create and show or
  submissions.
  • Issues: #34
  • Commits: @6420156b @87859b58 @595c7e11 @04c900c9 @cb676d6c

Improvements

• Use Redis queue with name that corresponds with the current Judge0 API version. This allows multiple instances of different versions of Judge0 API to use the same Redis instance.
  • Commits: @dd6b62d7
• Refactored submission field checking.
  • Commits: @9acefdbc
• Refactored setting up of default values.
  • Commits: @a14ae5d5

Bug Fixes

• Fixed a bug that ignored custom setting of configuration variables enable_per_process_and_thread_time_limit and enable_per_process_and_thread_memory_limit.
  • Commits: @a6f693a0
• Fixed a bug where cgroups flags for isolate were chosen in the wrong conditions.
  • Commits: @4116b9cb
• Fixed a bug that caused Internal Error because sandbox cleanup failed.
  • Pull Requests: #126
  • Issues: #123 #143
  • Commits: @514aec53
• Fixed a bug where low memory_limit would cause Internal Error. Minimum required value for memory_limit is now 2048.
  • Commits: @655ccf27

Security Fixes

• Fixed a bug that allowed creation of an arbitrary size of the compile output.
  • Commits: @5fc7b823

Other Changes

• Do not implicitly force wide open CORS settings when in development mode. I.e. variable ALLOW_ORIGIN can now also be used in development mode.
  • Commits: @a3a24c5c
• Removed output of configuration settings when server or worker starts.
  • Commits: @7061de7a
• Updated all the gems except Rails to the latest versions.
  • Commits: @230c7a77 @69a9fe11 @095588e6
• Changed default value of enable_per_process_and_thread_memory_limit to false.
  • Commits: @4116b9cb
• Don't show total number of workers in /workers that is determined with configuration variable COUNT because that number is not relevant.
  • Commits: @99939b89
• Changed the default port to 80 in Docker Compose file.
  • Commits: @6ab67d6b
• Limited the log size to 100 MB in Docker Compose file.
  • Commits: @435c7d79
• Added logging to run-workers script.
  • Commits: @381265a2
• Updated dummy client default values.
• Added Docker Compose file for HTTPS support.
• Refactored all development and production scripts from scripts directory.
• Refactored judge0-api.conf file.

Deployment Procedure

With HTTPS (SSL/TLS)

1. Install Docker and Docker Compose.
2. Download and extract release archive:

wget https://github.com/judge0/api/releases/download/v1.6.0/judge0-api-v1.6.0-https.zip
unzip judge0-api-v1.6.0-https.zip

3. Change directory to judge0-api-v1.6.0-https:

cd judge0-api-v1.6.0-https

4. Edit docker-compose.yml and change variables VIRTUAL_HOST, LETSENCRYPT_HOST and LETSENCRYPT_EMAIL.
5. Run all services and wait few seconds until everything is initialized:

docker-compose up -d db redis nginx letsencrypt
sleep 10s
docker-compose up -d
sleep 5s

6. Your instance of Judge0 API v1.6.0 is now available at https://<YOUR DOMAIN>.

With HTTP

1. Install Docker and Docker Compose.
2. Download and extract release archive:

wget https://github.com/judge0/api/releases/download/v1.6.0/judge0-api-v1.6.0.zip
unzip judge0-api-v1.6.0.zip

3. Run all services and wait few seconds until everything is initialized:

cd judge0-api-v1.6.0
docker-compose up -d db redis
sleep 10s
docker-compose up -d
sleep 5s

4. Your instance of Judge0 API v1.6.0 is now available at http://<IP ADDRESS OF YOUR SERVER>.