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@laziel laziel/youtube.js forked from max-te/youtube.js
Created Nov 17, 2018

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Download Youtube-Video in node.js
var http = require('http')
var fs = require('fs')
var argv = require('optimist').argv
var rxVideoID = /v=([\]\[!"#$%'()*+,.\/:;<=>?@\^_`{|}~-\w]*)/
var link = argv._.toString()
var videoID = link.match(rxVideoID)[1]
http.get("http://www.youtube.com/get_video_info?video_id="+videoID, function(res) {
var chunks = []
res.on('data', function(chunk){chunks.push(chunk)
}).on('end', function(){
var data = Buffer.concat(chunks).toString()
var videoInfo = parseVideoInfo(data)
downloadVideo(videoInfo)
})
}).on('error', function(e) {
console.log("Got error: " + e.message)
});
function parseVideoInfo(videoInfo) {
var rxUrlMap = /url_encoded_fmt_stream_map=([\]\[!"#$%'()*+,.\/:;<=>?@\^_`{|}~-\w]*)/
urlmap = unescape(videoInfo.match(rxUrlMap)[1])
var rxUrlG = /url=([\]\[!"#$%'()*+,.\/:;<=>?@\^_`{|}~-\w]*)/g
var rxUrl = /url=([\]\[!"#$%'()*+,.\/:;<=>?@\^_`{|}~-\w]*)/
var urls = urlmap.match(rxUrlG)
urls = map(urls, function(s) {return s.match(rxUrl)[1]} )
urls = map(urls, unescape)
var rxTitle = /title=([\]\[!"#$%'()*+,.\/:;<=>?@\^_`{|}~-\w]*)/
var title = argv.o ? argv.o : videoInfo.match(rxTitle)[1]
return { title: title, urls: urls }
}
function downloadVideo(videoInfo) {
var url = videoInfo.urls[0];
var filename = videoInfo.title + ".flv"
http.get(url,
function(res) {
var stream = fs.createWriteStream(filename)
res.pipe(stream)
})
console.log("Downloading to "+filename);
}
function map (a,f) {
for(i=0;i<a.length;i++){
a[i]= f(a[i])
}
return a
}
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