I was trying to run the Python program through spawn child process function and trying to give timeout option for TLE cases. But Timeout option is not working. Code is running fine for smaller inputs, but when running on input size > 1e9 it should terminate in 5 seconds according to my code. But when sending request it gets hanging around infinitely.
My Nodejs code
let python = spawn('python3', [`./uploads/${codefile}`], { timeout: 5000 });
python.stdout.on('data', (data) => {
res.status(200).json({ Success: data.toString() });
deleteFiles(req.files)
return;
});
python.stderr.on('data', (data) => {
res.status(200).json({ Error: data.toString() });
deleteFiles(req.files)
return;
});
python.on('error', (err) => {
// will handle Sigterm signal here
// res.status(200).json({
// errorMessage: "Time Limit Exceeded, Please Optimised Your Code",
// errorType: "Time Limit Exceeded"
// });
console.log(err)
res.status(500).send("Internal Server Error");
deleteFiles(req.files);
return;
});
My Python code
n=10000000000
b=0;
for i in range(n):
b+=1
print("calculated sum is",b)
I have also tried exec function with timeout option and it is working fine there but due to security reasons I do not wan't to use it. I am using Node.js version 16.15.1
Uh, if the timeout in spawn isn't working.. you can use setTimeout logic to kill the program that would have its Time Limit Exceeded
let python = spawn('python3', [`./uploads/${codefile}`]);
let timeout=setTimeout(()=>{
python.kill() //kills the program that is taking too long
deleteFiles(req.files)
res.status(200).json({
errorMessage: "Time Limit Exceeded, Please Optimised Your Code",
errorType: "Time Limit Exceeded"
});
},5000)
//I'd add a "python.on('end',some_callback)" but you seem to return the response on one chunk of data
python.stdout.on('data', (data) => {
res.status(200).json({ Success: data.toString() });
deleteFiles(req.files)
clearTimeout(timeout) //preventing the timeout from calling since it didn't take too long
return;
});
python.stderr.on('data', (data) => {
res.status(200).json({ Error: data.toString() });
deleteFiles(req.files)
clearTimeout(timeout) //preventing the timeout from calling since it didn't take too long
return;
});
python.on('error', (err) => {
// will handle Sigterm signal here
// res.status(200).json({
// errorMessage: "Time Limit Exceeded, Please Optimised Your Code",
// errorType: "Time Limit Exceeded"
// });
console.log(err)
clearTimeout(timeout) //preventing the timeout from calling since it didn't take too long
res.status(500).send("Internal Server Error");
deleteFiles(req.files);
return;
});