Created
September 17, 2012 15:56
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Download Youtube-Video in node.js
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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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i want school management system.
teachers have to login and download video from youtube capturing url link.
student learn via video.
could you help me?