Download Youtube Videos
当前为
// ==UserScript==
// @name Xmillsa's Youtube Downloader
// @version 0.0.5
// @namespace https://andys-net.co.uk/
// @author Xmillsa
// @grant none
// @match https://www.youtube.com/*
// @homepageURL https://andys-net.co.uk/
// @description Download Youtube Videos
// ==/UserScript==
(function(){
"use strict";
const ytDownloader = {};
let ytd = {
videoID: '',
videoObj: {},
formats: [],
adaptive: [],
container: null,
// Gets the current videos ID.
getVideoID: function(){
return new Promise(function(resolve, reject){
if (document.querySelector('[video-id]') === null){
// Doesn't exist yet...
reject('Can\'t find a video, trying again in .5 seconds.');
}else{
// Store the video ID.
// this.videoID = document.querySelector('[video-id]').getAttribute('video-id');
this.videoID = /(?![\?v=]).*?(?=&|$)/i.exec(window.location.search);
resolve();
}
}.bind(this));
},
// Let's get some details!
getVideoDetails: function(){
console.log('Get video details');
return new Promise(function(resolve, reject){
fetch('https://www.youtube.com/get_video_info?video_id='+ this.videoID +'&el=detailpage', {method: 'GET'})
.then(r => r.text())
.then(r => {
// Store some info.
this.videoObj = JSON.parse(decodeURIComponent(String(/player_response=[^&]*/i.exec(r)).replace('player_response=', '')));
this.formats = this.videoObj.streamingData.formats;
this.adaptive = this.videoObj.streamingData.adaptiveFormats;
// Carry on.
resolve();
})
.catch(e => {
console.error(e);
console.error('https://www.youtube.com/get_video_info?video_id='+ this.videoID +'&el=detailpage');
reject('There was an error with the fetch request... trying again.');
});
}.bind(this));
},
makeButtons: function(){
// Check we have a container to put our links.
if (this.container === null){
console.log('Container Missing, Creating...');
this.createContainer();
return;
}
this.formats.sort((a, b) => {
return parseInt(b.contentLength) - parseInt(a.contentLength);
});
this.adaptive.sort((a, b) => {
return parseInt(b.contentLength) - parseInt(a.contentLength);
});
let i = 0;
for(; i < this.formats.length; i++){
let a = this.createALink( this.formats[ i ] );
document.getElementById('andyLeft').appendChild(a);
document.getElementById('andyLeft').appendChild(document.createElement('br'));
}
i = 0;
for(; i < this.adaptive.length; i++){
let a = this.createALink( this.adaptive[ i ] );
document.getElementById('andyRight').appendChild(a);
document.getElementById('andyRight').appendChild(document.createElement('br'));
}
},
// This creates a container for our buttons.
createContainer: function(){
// Check it doesn't already exist.
if (document.getElementById('andysContainer') === null){
const div = document.createElement('div'),
target = document.getElementById('player');
// Check our target exists.
if (target !== null){
div.className = 'style-scope ytd-watch-flexy';
div.id = 'andysContainer';
div.innerHTML = '<div id="andyLeft"></div><div id="andyRight"></div>';
target.parentNode.insertBefore(div, target.parentNode.querySelector('#meta'));
this.container = div;
}
}
this.makeButtons();
},
/*
Creates our <a> links ready to be put into the page!
*/
createALink: function( format ){
// Create a button for each format.
let a = document.createElement('a'),
mime = format['mimeType'].split(';')[0],
qual = format['qualityLabel'],
size = Number(format['contentLength'] / 1024 / 1024).toFixed(2);
a.title = format['mimeType'];
switch (mime){
case 'video/3gpp':
a.innerText = qual +' .3gp';
break;
case 'video/mp4':
a.innerText = qual +' .mp4';
break;
case 'video/webm':
a.innerText = qual +' .webm';
break;
case 'audio/mp4':
a.innerText = 'Audio Only .m4a';
break;
case 'audio/webm':
a.innerText = 'Audio Only .webm';
break;
default:
a.innerText = qual +' Unknown Type?!';
}
a.innerText += ', Size: '+ size +'MB';
a.target = '_blank';
a.download = document.title.replace(' - YouTube', '').replace('(', '').replace(')', '');
a.href = format['url'];
return a;
},
reset: function(){
if (this.container !== null){
this.container.remove();
}
// Reset vars.
this.videoID = '';
this.videoObj = {};
this.formats = [];
this.adaptive = [];
this.container = null;
},
// The PROCESS
process: function(){
// Reset.
this.reset();
// Check we're on a watch?v= page.
if (/watch\?v/.test(window.location.href)){
this.getVideoID()
.then(() => {
// We have an ID, lets fetch it's info!
console.log('Found the video!');
this.getVideoDetails()
.then(() => {
console.log('Make buttons.');
this.makeButtons();
})
.catch(e => {
console.log(e);
// Try again?
setTimeout(this.process.bind(this), 500);
});
})
.catch(e => {
console.error(e);
// Try again?
setTimeout(this.process.bind(this), 500);
});
}
}
};
/*
Let's look for some page changes.
*/
let oldURL = '',
newURL = window.location.href;
setInterval(loopyLoops, 100);
// Check for changes.
function loopyLoops(){
newURL = window.location.href;
// We've moved pages, start the PROCESS.
if (oldURL !== newURL){
console.log('New page!');
oldURL = window.location.href;
ytd.process();
}
}
const css = `
#andysContainer{
margin-top:26px;
font-size:1.3em;
display:flex;
justify-content:space-evenly;
width:100%;
}
#andysContainer a{
color: #a92;
}`;
const style = document.createElement('style');
style.innerText = css;
document.head.appendChild(style);
}());