This API Runs Code submissions in a secure environment and Passes Verdicts based on pre-saved testcases. It uses RabbitMQ for Queueing the submissions, Redis for Caching the results and Docker for Sandboxing. It is a Remote Code Execution Engine, linked to an online judge. It suppports the following Languages:
- C
- C++
- Python 3
The Following Services should be up and running:
Apart from this You should have Docker Installed in your system
Run the following Command to clone the repository:
git clone https://github.com/bluemincoder/Online-Judge.git
node Server/server.js
node Judge/config/rabbitMQ.js
The Problem Lies in the scale, This kind of API would work fine without Message Queueing with a small scale, whee at a time, the API might only face about 10-15 Submission at a time at most. However For a lager Scale, it becomes Impossible to execute all of them at once. One solution could be rate Limiting, but It would be unfair in a coding contest if your submission is held because of rate limiting, and hence Message Queueing was a Legitimate option.
Let us Consider a case where a person tries to submit a malicious Code, like try to do a Fork attack or execute "rm-rf". In such Cases Docker Plays a crucial role in Containerizing the effects of such malicious code.
Following Header is to be used for All requests:
{"Content-type" : "application/json"}
Testcases need to be individually sent as a Post request to
http://localhost:3000/testCase/:questionID
where :questionID refers to a unique question ID for a question
The Body for Posting Testcases should be in the following format:
{
inputSRC : "Input of the respective testcase"
outputSRC : "Expected output for the above input"
}
To delete The Testcases, send a Delete request to:
http://localhost:3000/testCase/delete-all/:questionID
To Check a particular Testcase, send a Get request to:
http://localhost:3000/testCase/:questionID/:testcaseNumber
where :testCaseNumber refers to the testcase number of the particular Test Case you want to recieve.
Although the Testcases are posted individually, a submitted program will be tested against all the testcases.
To post a submission, send a Post request to:
http://localhost:3000/submit/
The body of the Post should include:
{
questionID: "Question ID of the question for whom the submission is supposed to be"
language: "Language Code of the Submission as per given below"
timeOut: "Time Limit for Execution"
src: "Source code of Submission"
}
The language Code of the languages are given below:
- C: 'C'
- C++: 'C++'
- Python: 'python3'
When Successfully Queued, the API Sends the Following response:
{
status: "InQueue"
submissionID: "The submission ID assigned by the API to the respective submission"
}
After this, the User needs to send Regular Get Requests to:
http://localhost:3000/result/:submissionID
To get updates about the Submission. Here submissionID is the Submission ID assigned to the submission by the application
Refer Below for What does each response mean:
- AC: All Correct
- WA: Wrong Answer
- CE: Compilation Error
- timeOut: Time Limit Exceeded
- Online Coding Contests
- Coding Interviews
- Online Assesments and Coding Tests