Simple NodeJS function to convert .torrent files to magnet URIs

torrent-to-magnet.js

// This file is licensed under LGPLv3
// (c) teidesu 2020

const qs = require('querystring')
const crypto = require('crypto')
// https://gist.github.com/teidesu/a1eadf71ffd88166415e2ea8b94d3f3b
const bencode = require('./bencode')

function convert (file) {
    const data = bencode.decode(f)

    const infoHash = crypto.createHash('sha1').update(encode(data.info)).digest('hex')
    let params = {
        xt: `urn:btih:${infoHash}`,
        tr: []
    }
    
    if ('length' in data.info) {
        params.xl = data.info.length
    }
    if ('name' in data.info) {
        params.dn = data.info.name.toString('utf-8')
    }
    if ('announce' in data) {
        params.tr.push(data.announce.toString('utf-8'))
    }
    if ('announce-list' in data && Array.isArray(data['announce-list'])) {
        params.tr.push(...data['announce-list'].map(ann => ann.toString('utf-8')))
    }
    
    return 'magnet:?' + qs.stringify(params)
}

// usage:
console.log(convert(require('fs').readFileSync('lorem-ipsum.torrent')))

Perhaps the 'encode()' on line 12 is 'qs.encode()'.

Perhaps the 'encode()' on line 12 is 'qs.encode()'.

perhaps
I never ended up using this 😅

This has been a great help to me thank you 😊

When I try to import the magnets it tells me that it is invalid, did you have a solution?

When I try to import the magnets it tells me that it is invalid, did you have a solution?

Can you show the code and error message?

I manage to import the magnets, it's just the one that doesn't work

You should provide code so I can reproduce the error. 😅
And the execution environment must also be informed.
I can't tell just by looking at the magnet.

Here is my magnet generated by the script:
magnet:?xt=urn%3Abtih%3Afbe00679d7f8ee32ebbee1a5b51060117fce0b94&tr=http%3A%2F%2Fp2p.yggtracking.org%3A8080%2FtqL6KCot0p6wvZLHREAYBU5qg1UBgDOp%2Fannounce&xl=4939938707&dn=Foot.CDM22.GroupeD.Tunisie.Australie.261122.MULTi.1080p.HDTV.x264-BABA.mkv
And as a client uses alldebrid

I'm sorry. You are right.
I investigated and found that the process of reading and interpreting the file was wrong.
So infoHash and announce etc were being entered incorrectly.
So I found a new way.
I'm attaching a new code that uses a package called 'parse-torrent'! 😄

import parseTorrent from "parse-torrent";
import fs from "fs";
import qs from "querystring";

function convert(file) {
  const data = parseTorrent(file);

  let params = {
    xt: `urn:btih:${data.infoHash}`,
    dn: data.name,
    tr: data.announce,
  };

  return "magnet:?" + qs.stringify(params)
}

// usage:
console.log(convert(fs.readFileSync("lorem-ipsum.torrent")));

I still have the same error

I tested using Bittorrent and it worked fine. I'm not sure what's wrong. 😥