The following code is made for to take a python code submission and encode and compare to the expected output in the db. However, when using special characters (‘´’, ‘~’, ‘ç’) it does not convert correctly
what causes an error in the comparison with the expected output.
For example, ‘print(‘não’)’, outputs to n�o, when it should obviously be ‘não’.

Note: the Raw stout data gives the correct hexcode for the input(Raw stdout data: <Buffer 6e e3 6f 0d 0a>).

submissionCodeHadler,js file:

`const { spawn } = require('child_process');
const fs = require('fs').promises

async function invokeSubmission(filePath, inputString, err, success) {

  const python = spawn('python', [filePath]);

  const inputBuffer = Buffer.from(inputString, 'utf-8');

  let stdout = "";
  let stderr = "";
  python.stdin.write(inputBuffer);
  python.stdin.end();

  python.stdout.on('data', (data) => {
    console.log('Raw stdout data:', data);
    stdout += data.toString();
  });

  python.stderr.on('data', (data) => {
    console.log('Raw stderr data:', data);
    stderr += data.toString('utf-8');
  });


  python.on('close', (code) => {
    if (code === 0) {
      // 0 significa sucesso, então envie stdout
      console.log("win", stdout);
      success(stdout);
    } else {
      stderr = stderr.split(',');
      console.log("fail", stderr);
      err(stderr[1] + stderr[2]);
    }
  });
}

module.exports = invokeSubmission;`

SubmissionFileHandler.js file:

    const fs = require('fs').promises
const config = require('../config')
const BASE_DIR = config.challengesBaseDir

fs.mkdir(BASE_DIR, { recursive: true })

class ChallengesFileHandler {
    async create(filename, data) {
        const path = `${BASE_DIR}/${filename}`
        const fileHandle = await fs.open(path, "w")
        fileHandle.writeFile(data)
        fileHandle.close()

        return path
    }
}

module.exports = new ChallengesFileHandler()

To encode correctly.