Created
June 1, 2018 21:36
-
-
Save svdoever/c4af8860baacd2d1a49a3afaceebf29a to your computer and use it in GitHub Desktop.
NodeJS Express service to convert YouTube url to mp4 url
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const axios = require('axios'); | |
| const express = require('express'); | |
| // from https://codewithmark.com/learn-to-create-youtube-video-downloader | |
| function qsToJson(qs) { | |
| var res = {}; | |
| var pars = qs.split('&'); | |
| var kv, k, v; | |
| for (i in pars) { | |
| kv = pars[i].split('='); | |
| k = kv[0]; | |
| v = kv[1]; | |
| res[k] = decodeURIComponent(v); | |
| } | |
| return res; | |
| } | |
| // from https://davidwalsh.name/query-string-javascript | |
| function getUrlParameter(search, name) { | |
| name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]'); | |
| var regex = new RegExp('[\\?&]' + name + '=([^&#]*)'); | |
| var results = regex.exec(search); | |
| return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' ')); | |
| }; | |
| async function youTubeVideoInfo(id) { | |
| var url = 'http://www.youtube.com/get_video_info?html5=1&video_id=' + id; | |
| const videoInfoResponse = await axios.get(url); | |
| if (videoInfoResponse.status != 200) { | |
| throw new Error(`YouTube get video info failed: ${videoInfoResponse.status} - ${videoInfoResponse.statusText}`); | |
| } | |
| var get_video_info = qsToJson(videoInfoResponse.data); | |
| // remapping urls into an array of objects | |
| var tmp = get_video_info["url_encoded_fmt_stream_map"]; | |
| if (tmp) { | |
| tmp = tmp.split(','); | |
| for (i in tmp) { | |
| tmp[i] = qsToJson(tmp[i]); | |
| } | |
| get_video_info["url_encoded_fmt_stream_map"] = tmp; | |
| } | |
| return get_video_info; | |
| } | |
| const app = express(); | |
| app.get('/youtube2mp4', async function (req, res) { | |
| res.setHeader('Content-Type', 'application/json'); | |
| if (req.query.url) { | |
| try { | |
| youTubeVideoUrl = req.query.url; | |
| youTubeVideoId = getUrlParameter(youTubeVideoUrl.substring(youTubeVideoUrl.indexOf('?')), 'v'); | |
| const videoInfo = await youTubeVideoInfo(youTubeVideoId); | |
| if (videoInfo.status === 'failed') { | |
| throw(new Error(`Failed due to: ${videoInfo.reason}`)); | |
| } | |
| if (!!videoInfo && !!videoInfo.url_encoded_fmt_stream_map) { | |
| const mp4VideoEntry = videoInfo.url_encoded_fmt_stream_map.find(v => v.type.startsWith('video/mp4')); | |
| if (!mp4VideoEntry) { | |
| throw(new Error(`Failed to resolve mp4 video for ${youTubeVideoUrl}`)); | |
| } | |
| res.send(`{success:true,url:'${mp4VideoEntry.url}'}`); | |
| } else { | |
| throw(new Error(`Failed to resolve mp4 video for ${youTubeVideoUrl}`)); | |
| } | |
| } catch(error) { | |
| res.send(`{success:false,error:'${error.message}'}`); | |
| } | |
| } else { | |
| res.send(`{success:false,error:'Url parameter missing'}`); | |
| } | |
| }); | |
| app.listen(9000, () => { | |
| console.log("Server listening on port 9000!"); | |
| }); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
its really help me to convert youtube video to mp4, really helpful tool. please post tool information about youtube2mp3.