mangastream.js

javascript:(function(){"use strict";let proxy="https://cors-anywhere.herokuapp.com/";let host_regex="https?://readms.net/r/";let _scope=function(scope){this.dependencies=[];this.scope=scope;this.load=function(url){let script=document.createElement("script");script.src=url;let p=new Promise((resolve,reject)=>{script.onload=resolve;script.onerror=function(){reject(url)}});scope.appendChild(script);this.dependencies.push(p)};this.run=async function(func){await Promise.all(this.dependencies).catch(function(error){let emsg=`Dependency '${error}' failed to load`;alert(emsg);throw emsg});let script=document.createElement("script");script.text=`(function(){let proxy='${proxy}'; (${func.toString()})()})()`;scope.appendChild(script)}};let local_scope=async function(){let scope=new _scope(document.body);return scope};let iframe_scope=async function(){let iframe=document.createElement("iframe");iframe.style.display="none";let loaded=new Promise((resolve,reject)=>{iframe.onload=resolve});document.body.appendChild(iframe);await loaded;let scope=new _scope(iframe.contentDocument.body);return scope};let bookmarklet=async function(dependencies,func,scope=iframe_scope){if(!location.href.match(host_regex)){if(!confirm(`Current url doesn't match host regex:\n${host_regex}\n\nContinue?`))return}let iframe=await scope();for(let dependency of dependencies){iframe.load(dependency)}iframe.run(func);return iframe};bookmarklet(["https://stuk.github.io/jszip/dist/jszip.js","https://stuk.github.io/jszip-utils/dist/jszip-utils.js","https://stuk.github.io/jszip/vendor/FileSaver.js"],function(){function urlToPromise(url){return new Promise(function(resolve,reject){JSZipUtils.getBinaryContent(proxy+url,function(err,data){if(err){reject(err)}else{resolve(data)}})})}async function _process_urls(queue,limit){let executing=[];let promises=[];for(let[resolve,name,url]of queue){if(executing.length>=limit){await Promise.race(executing)}let promise=urlToPromise(url);executing.push(promise);promises.push(promise);promise.then(data=>{executing.splice(executing.indexOf(promise),1);resolve([name,data])})}}function process_urls(links,limit=4){let promises=[];let queue=[];for(let[name,link]of links){promise=new Promise(function(resolve,reject){queue.push([resolve,name,link])});promises.push(promise)}_process_urls(queue,limit);return promises}async function download_images(archive_name,links){var zip=new JSZip;let promises=process_urls(links);for(let promise of promises){let[filename,data]=await promise;zip.file(filename,data,{binary:true})}zip.generateAsync({type:"blob"},function updateCallback(metadata){}).then(function callback(blob){saveAs(blob,archive_name);console.log("done !")},function(e){alert(e)})}let maxpage=0;let parser=new DOMParser;async function fetch_page(page,prefix){link=`https://readms.net/r/${prefix}${manga_name}/${chapter}/${mangastream_chapter_id}/${page}`;let r=await fetch(link);let text=await r.text();let doc=parser.parseFromString(text,"text/html");let image_link=doc.getElementById("manga-page").src;let image_name=page.toString().padStart(Math.floor(Math.log10(maxpage))+1,0)+"_"+image_link.split("/").pop();return[image_name,image_link]}async function start(){let href_parts;for(let li of document.getElementsByClassName("btn-reader-page")[0].getElementsByTagName("li")){href_parts=li.firstChild.href.split("/");pageid=parseInt(href_parts.pop());if(pageid>maxpage){maxpage=pageid}}mangastream_chapter_id=href_parts.pop();chapter=href_parts.pop();manga_name=href_parts.pop();extras=[];let extra;while((extra=href_parts.pop())!=="r"){extras.push(extra+"/")}pages=[];for(let page=1;page<=maxpage;page++){pages.push(fetch_page(page,extras.join("")))}download_name=`[MangaStream]${manga_name}_c${chapter.padStart(3,0)}.zip`;download_images(download_name,await Promise.all(pages))}start()},local_scope)})();