Problem With Conversions

Code Help Node JS
1

I am developing a basic converter program in node.js and HTML: https://replit.com/@OSoft/Converter?v=1
It looks like it converts, but the converted file cannot be opened and is unreadable, which compels me to conclude that the conversion process isn’t actually working. I am using “libreoffice-convert”. Can anyone analyze the code and tell me what I should fix or what I am doing wrong?

2

I saw that you are using “done” in your index.js and you should not use the done variable (which is the buffer) as a file path.

I modified your /convert route in your index.js. Try to see if it works.

import fs from 'fs';

// ...

app.post('/convert', upload.single('file'), (req, res) => {
  const format = req.body.format;
  if (!format) {
    res.status(400).send('No format specified');
    return;
  }
  if (!req.file) {
    res.status(400).send('No file uploaded');
    return;
  }
  const inputFile = req.file.path;
  const outputFile = `${inputFile}.${format}`;
  convert(inputFile, format, undefined, (err, done) => {
    if (err) {
      console.error(err);
      res.status(500).send('Error converting file');
      return;
    }
    // Set the content type based on the desired output format
    res.setHeader('Content-Type', `application/${format}`);
    // Send the buffer directly to the client
    res.send(done);

    // Clean up the temporary file
    fs.unlink(inputFile, (err) => {
      if (err) {
        console.error(err);
      }
    });
  });
});
2 Likes
3 
import express from 'express';
import multer from 'multer';
import { convert } from 'libreoffice-convert';
import { join } from 'path';
import fs from 'fs';

const app = express();
const upload = multer({ dest: 'uploads/' });

// Define a route for the root URL
app.get('/', (req, res) => {
  res.sendFile(join(__dirname, 'index.html'));
});

app.post('/convert', upload.single('file'), (req, res) => {
  const format = req.body.format;
  if (!format) {
    res.status(400).send('No format specified');
    return;
  }
  if (!req.file) {
    res.status(400).send('No file uploaded');
    return;
  }
  const inputFile = req.file.path;
  const outputFile = `${inputFile}.${format}`;
  convert(inputFile, format, undefined, (err, done) => {
    if (err) {
      console.error(err);
      res.status(500).send('Error converting file');
      return;
    }
    // Set the content type based on the desired output format
    res.setHeader('Content-Type', `application/${format}`);
    // Send the buffer directly to the client
    res.send(done);

    // Clean up the temporary file
    fs.unlink(inputFile, (err) => {
      if (err) {
        console.error(err);
      }
    });
  });
});


app.listen(3000, () => {
  console.log('Server running on port 3000');
});

I got this error:

import express from 'express';
^^^^^^

SyntaxError: Cannot use import statement outside a module
1 Like
4

Honestly I would just use require:

const express = require('express');
2 Likes
5

You didn’t set the type to module in your package.json file.

You can use the recommendation of @QwertyQwerty88

2 Likes
6 
const express = require('express');
const multer = require('multer');
import { convert } from 'libreoffice-convert';
import { join } from 'path';
import fs from 'fs';

const app = express();
const upload = multer({ dest: 'uploads/' });

// Define a route for the root URL
app.get('/', (req, res) => {
  res.sendFile(join(__dirname, 'index.html'));
});

app.post('/convert', upload.single('file'), (req, res) => {
  const format = req.body.format;
  if (!format) {
    res.status(400).send('No format specified');
    return;
  }
  if (!req.file) {
    res.status(400).send('No file uploaded');
    return;
  }
  const inputFile = req.file.path;
  const outputFile = `${inputFile}.${format}`;
  convert(inputFile, format, undefined, (err, done) => {
    if (err) {
      console.error(err);
      res.status(500).send('Error converting file');
      return;
    }
    // Set the content type based on the desired output format
    res.setHeader('Content-Type', `application/${format}`);
    // Send the buffer directly to the client
    res.send(done);

    // Clean up the temporary file
    fs.unlink(inputFile, (err) => {
      if (err) {
        console.error(err);
      }
    });
  });
});


app.listen(3000, () => {
  console.log('Server running on port 3000');
});

And I got this error:

import { convert } from 'libreoffice-convert';
^^^^^^

SyntaxError: Cannot use import statement outside a module
7

Change

import { convert } from 'libreoffice-convert';
import { join } from 'path';
import fs from 'fs';

With

const { convert } = require('libreoffice-convert');
const { join } = require('path');
const fs = require('fs');

You are mixing ES6 import statements with CommonJS.

2 Likes