NCHU Algorithm Course Assignment Submission Platform (Deploy, Backend)

For Frontend related modifications, please refer to IdONTKnowCHEK/OnlineJudgeFE-NCHU

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This platform is modified based on QingdaoU/OnlineJudge, with several new features added to the Backend for course requirements:

1. Scripted the SSH configuration steps for containers in the DockerFile (to facilitate internal file modifications)
2. Each assignment is ranked by execution time or memory usage, and grades are assigned based on ranking
3. Assignments use Java with all import functions disabled by default, but can be selectively enabled as needed
4. Modified the original Special Judge function to use JSON format for setting assignment deadlines, allowed imports, ranking methods, late submission allowances, and late submission deadlines
5. Added Expired status to Judge results to mark late submissions

Deploy Step

1. Clone this repo

   git clone https://github.com/Rui0828/algo_oj_backend-NCHU-CSE.git

2. Configure environment parameters file .env

   export JUDGE_SERVER_TOKEN=TOKEN
   export BE_USERNAME=Backend-SSH-Username
   export BE_PASSWORD=Backend-SSH-Password

3. Start Docker Container

   docker-compose -p {container-name} up -d

Ranking by Execution Time or Memory Usage

• The system automatically selects the best-performing version (time/memory) from each user's submissions for ranking

Import Restrictions in Java (with Selective Allowances)

• If submitted code contains non-allowed import statements, the system will return Compile Error

Special Judge Function Modified to Special Settings

• Uses JSON format for configuration

• "expire_time": "2025-3-28T14:00:00" sets assignment deadline (default: no deadline)
• "allowed_imports": ["java.util.Scanner"] sets allowed imports (default: all disabled)
  • java.util.* means all packages in java.util are allowed
  • * means all packages are allowed
• "rank_type": "time" sets ranking type, options are time or memory (default: time)
• "late_allowed": ["ta", "test"] usernames allowed for late submissions
• "late_until":"2025-3-12T14:00:00" extended deadline for late submissions (default: no extended deadline)

Late Submissions Display Expired Status

Original QDUOJ:

• Backend (Django): https://github.com/QingdaoU/OnlineJudge
• Frontend (Vue): https://github.com/QingdaoU/OnlineJudgeFE
• Judger Sandbox (Seccomp): https://github.com/QingdaoU/Judger
• JudgeServer (A wrapper for Judger): https://github.com/QingdaoU/JudgeServer

License

MIT