我正在尝试编写一个程序，可以将HTTP URL转换为种子文件。该项目基本上适用于下载链接包含小文件的情况，比如1-500Mb的文件。我的问题是，如果文件大小超过这个范围，应用程序就会崩溃或超时。所以我想知道如何解决这个问题。以下是我的代码和Github链接。
https://github.com/savadks95/FireBit
var http = require('http');
var webtorrentify = require('webtorrentify-link');
var fs = require('fs');
var url = require("url");
var path = require("path");
var validUrl = require('valid-url');
var express = require('express');
var getUrls = require('get-urls');
var remote = require('remote-file-size');
var app = express();
var downloadLink;
var fileName;
var fileSize;
var server;
var parsed;
var param;
var link;
var port;
port = process.env.PORT || 80;
app.get('/favicon.ico', function(req, res){
console.log('favicon request recived');
});
app.get('*', function(req, res){
if(req.url==='/'){
//app.use('/public/html', express.static(path.join(__dirname)));
fs.readFile('public/html/index.html', function (err, data) {
res.write(data);
});
}else if (req.url === '/l?thelink='){
fs.readFile('public/html/emptyRequest.html', function (err, data) {
res.write(data);
res.end();
});
}else{
//---------Reciving Url--------------------
console.log(req.query.thelink);
downloadLink=req.query.thelink;
//-----------------------------------------
//------------checking for valid url-------
if (validUrl.isUri(downloadLink)) {
console.log('Looks like an URL');
//-----------------------------------------
//----------Extracting filename-------------
parsed = url.parse(downloadLink);
fileName = path.basename(parsed.pathname);
console.log(path.basename(parsed.pathname));
//-------------------------------------------
//----------Finding File size----------------
remote(downloadLink, function(err, o) {
fileSize = (o/1024)/1024;
console.log('size of ' + fileName + ' = ' + fileSize+" MB");
//-------------------------------------------
if (fileSize < 501)
{
///////////////Creating Torrent////////////////////
webtorrentify(downloadLink)
.then(function (buffer) {
console.log('creating the torrent');
//res.send('what is');
//-------------------------------------------
res.setHeader('Content-Type', 'application/x-bittorrent');
res.setHeader('Content-Disposition', `inline; filename="${fileName}.torrent"`);
res.setHeader('Cache-Control', 'public, max-age=2592000'); // 30 days
res.send(buffer);
console.log(fileName+'.torrent created');
res.end();
//-------------------------------------------
});
////////////////////////////////////////////////
}
else{
console.log('More than 500 MB');
res.send("<h4> More than 500 MB or invalid URL </h4>");
}
});
}
else {
console.log('not url');
fs.readFile('public/html/404.html', function (err, data) {
res.write(data);
res.end();
});
}
}
});
app.listen(port);
console.log('server up and running', port);