Online-Judge
Tools used
- Programming languages: Java, JavaScript, C and Linux Shell Script (bash)
- Frameworks / Libraries: Bootstrap, Jquery, Ace Editor, Ckeditor, Java Mailer(spring), Google GSON, Java Encoder OWASP, Apache Validator, Apache Commons File Upload and MySQL JDBC Connector
- Server: Tomcat 9
- Database: MySQL 5.7
- Host OS: Ubuntu 18.04 LTS
- Sandboxing: Chroot based on Ubuntu 18.04 LTS
- Compilers: GCC 7.3.0, G++ 7.3.0, JDK 11(Oracle) and Python 3
- Additional libraries: libseccomp-dev and software-properties-common
Edits required
- Edit website/src/auth/Mailer.java using your email and password after subscribing for google mail service.
- Edit website/src/link/Link.java using your database credentials.
- Replace path-to-workspace in web.xml with a suitable path such as home/username/Desktop.
Login id
- Email: [email protected]
- Password: 123456
Demo video
- Link 1 (LinkedIn - SD quality only): https://www.linkedin.com/posts/vaibhaw-samrat-76511813a_my-btech-final-year-project-an-online-judge-activity-6568790862925529088-ccIw
- Link 2 (Google Drive - can be viewed in HD quality): https://drive.google.com/file/d/1201HCjKUiBbg9pYA792fWk_rZNR2_2Yp/view?usp=sharing
Deployment
- Install JDK, Tomcat Server, MYSQL.
- Setup chroot based on Ubuntu 18.04 LTS with all the compilers and addtitional libraries installed inside it.
- Path of chroot should be "/cryptic_security/jail".
- Place the "liboj" folder at "/" without the source folders and readme files.
- Adjust the permissions of all the files in the "liboj" folder.
- Binary files in "liboj/bin" folder are setuid wrappers, so, set the permissions accordingly.
- Place the "java_policy" file(available in source folder of judge) inside the "/etc" folder of chroot os.
- Import the database using the "database.sql" file in database folder.
- Deploy the website on Tomcat Server.
Bugs
Some of the known bugs are:
- JQuery AJAX and prepend functions fail on Google Chrome but works on Firefox, Edge and other popular browsers.
- Judge fails for first few program run initially when server is started but starts working smoothly after 2 failed attempts.