Simple Video Downloader 3.0.4 - Webpack, ES6, Unit Tests and more!

Introducing to Simple Video Downloader

The Video Downloader is a Chrome Extension that helps you save your favorite videos. It can be installed via Chrome Webstore:
https://chrome.google.com/webstore/detail/ilcdiicigjaccgipndigcenjieedjohj/

Total Number of Current Users

Install on Firefox or other browsers?

It should work, but not fully tested on Firefox via Chrome Extension Foxified

Changes v3.0.4

Pull Requests Merged: https://github.com/DoctorLai/VideoDownloadHelper/pull/4

using ES6 and webpack - npm run build
unit tests via mocha and chai - npm run test
adding ParseVideo class that analyses HTML
handles pearvideo.com
handles miaopai.com

Class of ParseVideo

/* jshint -W097 */
/* jshint -W117 */
"use strict";

const { ValidURL, extractDomain, FixURL } = require( '../js/functions' )  ;

class ParseVideo {
    constructor(url, html = "") {
        // e.g. https://www.dailymotion.com/video/x2bu0q2
        this.url = url;
        // e.g. <html>....</html>
        this.html = html;
    }

    // entry of video parser
    Parse() {
        let domain = extractDomain(this.url);
        let video_url = "";
        if (domain.includes("miaopai.com")) {
            video_url = ParseVideo.parse_miaopai_com(this.url, this.html);
            if (ValidURL(video_url)) {
                return video_url;
            }
        }        
        if (domain.includes("pearvideo.com")) {
            video_url = ParseVideo.parse_pearvideo_com(this.url, this.html);
            if (ValidURL(video_url)) {
                return video_url;
            }            
        }
        video_url = ParseVideo.extract_all_video_urls(this.url, this.html);
        if (video_url !== null) {
            return video_url;
        }
        video_url = ParseVideo.extract_all_mp4_urls(this.url, this.html);
        if (video_url !== null) {
            return video_url;
        }
        return null;
    }

    // parse miaopai.com video e.g. https://miaopai.com/show/abcde.html
    // this is one of the simplest form and we can get it from URL
    static parse_miaopai_com(url, html) {
        let re = /.*miaopai\.com\/show\/(.*)\.html?$/i;
        let found = re.exec(url);
        if (found !== null) {
            return "http://gslb.miaopai.com/stream/" + found[1] + ".mp4";
        } 
        return null;
    }

    // extract all video_url in html e.g. "video_url": "https://aaaabbb.com/"
    static extract_all_video_urls(url, html) {
        let re = /['"]?video_url['"]?:\s*(['"])(https?:[^\s'",]+)\1/ig;
        let found = re.exec(html);
        let video_url = [];
        while (found !== null) {  
            let url = FixURL(found[2]);
            if (ValidURL(url)) {
                video_url.push(url);
            }
            found = re.exec(html);
        }
        return (video_url.length === 0) ? null :
               ( (video_url.length === 1) ? video_url[0] : video_url);
    }

    // parse pearvideo.com e.g. http://www.pearvideo.com/video_1050733
    static parse_pearvideo_com(url, html) {
        let video_url = [];
        let re = /([hsl]d|src)Url\s*=\s*[\"\']([^\"\']+)[\'\"]/ig;
        let found = re.exec(html);
        while (found !== null) {
            let tmp_url = FixURL(found[2]); 
            if (ValidURL(tmp_url)) {
                video_url.push(tmp_url);
            }
            found = re.exec(html);
        }        
        return (video_url.length === 0) ? null :
               ( (video_url.length === 1) ? video_url[0] : video_url);        
    }

    // extract all MP4 in html e.g. "mp4","url":"https://aabb.com"
    static extract_all_mp4_urls(url, html) {
        let re = /mp4[\'\"]\s*,\s*[\'\"]url[\'\"]\s*:\s*[\'\"]([^\"\']+)[\'\"]/ig;
        let found = re.exec(html);
        let video_url = [];
        while (found !== null) {  
            let url = FixURL(found[1]);
            if (ValidURL(url)) {
                video_url.push(url);
            }
            found = re.exec(html);
        }
        return (video_url.length === 0) ? null :
               ( (video_url.length === 1) ? video_url[0] : video_url);
    }
}

if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {
	module.exports = {
		ParseVideo
	};
}

Screenshot

Roadmap

Use async/await to replace Promise/Then
Fix broken video parser due to video site changes e.g. ted.com
Add more unit tests (increase code coverage)
Support vimeo and other video sites
Merge video segments (ts)

VIP Key Exclusive to Utopian

Please note, you can enter the VIP Key which allows you to call the server API in case the client video parser fails locally - this greatly unlocks video parser to many many other video sites.