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download.lib

当前为 2020-06-29 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.gf.qytechs.cn/scripts/398502/821561/download.js 

  1. // ==UserScript==
  2. // @name        download
  3. // @version     1.2.3
  4. // @include     *
  5. // ==/UserScript==
  6. // TODO: 支持fetch,xhr
  7. (function (window) {
  8.   const storageInit = {
  9.     default: {
  10.       debug: false,
  11.       mode: 'gm_xhr', // one of gm_xhr,fetch,xhr
  12.       retry: 5,
  13.       css: [
  14.         '#gmDownloadDialog{position:fixed;bottom:0;right:0;z-index:999999;background-color:white;border:1px solid black;text-align:center;color:black;overflow-x:hidden;overflow-y:auto;display:none;}',
  15.  
  16.         '#gmDownloadDialog>.nav-bar>button{width:24px;height:24px;z-index:1000001;padding:0;margin:0;}',
  17.         '#gmDownloadDialog>.nav-bar>[name="pause"]{float:left;}',
  18.         '#gmDownloadDialog>.nav-bar>[name="pause"][value="pause"]::before{content:"⏸️"}',
  19.         '#gmDownloadDialog>.nav-bar>[name="pause"][value="resume"]::before{content:"▶"}',
  20.         '#gmDownloadDialog>.nav-bar>[name="hide"]{float:right;}',
  21.         '#gmDownloadDialog>.nav-bar>[name="hide"]::before{content:"×";color:red;}',
  22.         '#gmDownloadDialog>.nav-bar>[name="total-progress"]{cursor:pointer;width:calc(100% - 65px);margin:4px;}',
  23.         '#gmDownloadDialog>.nav-bar>[name="total-progress"]::before{content:attr(value)" / "attr(max);}',
  24.  
  25.         '#gmDownloadDialog>.task{overflow-x:hidden;overflow-y:auto;width:300px;height:40vh;}', // display:flex;flex-direction:column;
  26.         '#gmDownloadDialog>.task>div{display:flex;}',
  27.         '#gmDownloadDialog>.task>div>*{margin:0 2px;white-space:nowrap;display:inline-block;}',
  28.  
  29.         '#gmDownloadDialog>.task>div>a[name="title"]{width:206px;overflow:hidden;text-overflow:ellipsis;text-align:justify;}',
  30.         '#gmDownloadDialog>.task>div>a[name="title"]:empty::before{content:attr(href)}',
  31.  
  32.         '#gmDownloadDialog>.task>div[status="downloading"]>progress{width:120px;display:inline-block!important;}',
  33.         '#gmDownloadDialog>.task>div[status="downloading"]>progress::before{content:attr(value)" / "attr(max);}',
  34.  
  35.         '#gmDownloadDialog>.task>div>[name="status"]{width:32px;}',
  36.         '#gmDownloadDialog>.task>div[status="downloading"]>[name="status"]{width:48px;}',
  37.         '#gmDownloadDialog>.task>div[status="downloading"]>[name="status"]::before{content:"下载中";color:#00f;}',
  38.         '#gmDownloadDialog>.task>div[status="error"]>[name="status"]::before{content:"错误";color:#f00;}',
  39.         '#gmDownloadDialog>.task>div[status="timeout"]>[name="status"]::before{content:"超时";color:#f00;}',
  40.         '#gmDownloadDialog>.task>div[status="abort"]>[name="status"]::before{content:"取消";color:#f00;}',
  41.         '#gmDownloadDialog>.task>div[status="load"]>[name="status"]::before{content:"完成";color:#0f0;}',
  42.  
  43.         '#gmDownloadDialog>.task>div[status="downloading"]>[name="abort"]{width:32px;cursor:pointer;}',
  44.         '#gmDownloadDialog>.task>div[status="downloading"]>[name="abort"]::before{content:"abort";color:#f00;}'
  45.       ].join(''),
  46.       progress: '{order}{title}{progress}{status}{abort}',
  47.       thread: 5,
  48.       onComplete (list) { }, // 当list任务全部完成时(不管是否有下载错误)
  49.       onfailed (res, request) { }, // 当某次请求失败(error/timeout)超过重复次数(之后不再尝试请求)
  50.       onfailedEvery (res, request, type) { }, // 当某次请求失败(error/timeout)
  51.       async checkLoad (res) {}, // 返回布尔，当false时，执行onerror并再次请求
  52.  
  53.       method: 'GET',
  54.       user: null,
  55.       password: null,
  56.       overrideMimeType: null,
  57.       headers: {
  58.         // 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
  59.       },
  60.       responseType: 'text',
  61.       timeout: null,
  62.       anonymous: false,
  63.       onabort (res, request) { },
  64.       onerror (res, request) { },
  65.       onload (res, request) { },
  66.       onprogress (res, request) { },
  67.       onreadystatechange (res, request) { },
  68.       ontimeout (res, request) { }
  69.     },
  70.     list: [
  71.       // request 请求信息
  72.       // status 状态 undefined,downloading,error,timeout,abort,load
  73.       // retry 重复请求次数
  74.       // abort 终止请求
  75.       // response
  76.     ],
  77.     pause: false,
  78.     downloading: false,
  79.     element: {},
  80.     cache: []
  81.   };
  82.  
  83.   let storage = Object.assign({}, JSON.parse(JSON.stringify(storageInit)));
  84.  
  85.   const updateProgress = (task, res = {}) => {
  86.     let elem;
  87.     let max = res.lengthComputable ? res.total : 1;
  88.     let value = res.statusText === 'OK' ? max : res.lengthComputable ? res.loaded : 0;
  89.     if (max !== 1 && value !== 0) {
  90.       value = Math.floor(value / max * 100);
  91.       max = 100;
  92.     }
  93.     if (storage.element.dialog.querySelector(`.task>[index="${task.request.index}"]`)) {
  94.       elem = storage.element.dialog.querySelector(`.task>[index="${task.request.index}"]`);
  95.       if (res.lengthComputable) {
  96.         elem.querySelector('progress').setAttribute('value', value);
  97.         elem.querySelector('progress').setAttribute('max', max);
  98.       }
  99.       if (task.request.title) {
  100.         elem.querySelector('[name="title"]').textContent = task.request.title;
  101.       } else if (res.statusText === 'OK' && !elem.querySelector('[name="title"]').textContent) {
  102.         let dom;
  103.         if (typeof res.response === 'string') {
  104.           dom = new window.DOMParser().parseFromString(res.response, 'text/html');
  105.         } else if (res.response instanceof window.Document) {
  106.           dom = res.response;
  107.         }
  108.         if (dom instanceof window.Document) elem.querySelector('[name="title"]').textContent = dom.title;
  109.       }
  110.     } else {
  111.       elem = document.createElement('div');
  112.       elem.setAttribute('index', task.request.index);
  113.       elem.innerHTML = storage.config.progress.replace(/\{(.*?)\}/g, (all, $1) => {
  114.         if ($1 === 'order') {
  115.           return `<span>${task.request.index + 1}</span>`;
  116.         } else if ($1 === 'title') {
  117.           const title = task.request.title || '';
  118.           return `<a name="title" href="${task.request.url}" target="_blank">${title}</a>`;
  119.         } else if ($1 === 'progress') {
  120.           return `<progress value="${value}" max="${max}" style="display:none;"></progress>`;
  121.         } else if ($1 === 'status') {
  122.           return '<span name="status"></span>';
  123.         } else if ($1 === 'abort') {
  124.           return '<a name="abort"></a>';
  125.         } else {
  126.           return '';
  127.         }
  128.       });
  129.       storage.element.dialog.querySelector('.task').appendChild(elem);
  130.     }
  131.     elem.setAttribute('status', task.status);
  132.     elem.scrollIntoView();
  133.     storage.element.dialog.querySelector('[name="total-progress"]').setAttribute('value', storage.list.filter(i => i.status && i.status !== 'downloading').length);
  134.   };
  135.  
  136.   const main = xhr;
  137.   main.sync = xhrSync;
  138.   main.init = (option) => {
  139.     main.stop();
  140.     for (const elem of Object.values(storage.element)) elem.parentNode.removeChild(elem);
  141.     storage = Object.assign({}, JSON.parse(JSON.stringify(storageInit)));
  142.     storage.config = Object.assign(storage.default, option);
  143.     for (const listener of ['onComplete', 'onfailed', 'onfailedEvery', 'checkLoad',
  144.       'onabort', 'onerror', 'onload', 'onprogress', 'onreadystatechange', 'ontimeout']) {
  145.       if (typeof storage.config[listener] !== 'function') storage.config[listener] = function () {};
  146.     }
  147.  
  148.     const style = document.createElement('style');
  149.     style.id = 'gmDownloadStyle';
  150.     style.textContent = storage.config.css;
  151.     document.head.appendChild(style);
  152.     storage.element.style = style;
  153.  
  154.     const dialog = document.createElement('div');
  155.     dialog.id = 'gmDownloadDialog';
  156.     dialog.innerHTML = [
  157.       '<div class="nav-bar">',
  158.       '  <button name="pause" value="pause"></button>',
  159.       '  <progress name="total-progress" value="0" max="1" title="点击清除已完成"></progress>',
  160.       '  <button name="hide"></button>',
  161.       '</div>',
  162.       '<div class="task"></div>',
  163.       '<div class="bottom-bar"></div>'
  164.     ].join('');
  165.     dialog.addEventListener('click', (e) => {
  166.       // TODO
  167.       const name = e.target.getAttribute('name');
  168.       if (name === 'pause') {
  169.         let value = e.target.getAttribute('value');
  170.         if (value === 'pause') {
  171.           main.pause();
  172.           value = 'resume';
  173.         } else {
  174.           main.resume();
  175.           value = 'pause';
  176.         }
  177.         e.target.setAttribute('value', value);
  178.       } else if (name === 'hide') {
  179.         main.hideDialog();
  180.       } else if (name === 'total-progress') {
  181.         for (const i of storage.element.dialog.querySelectorAll('.task>[status="load"]')) {
  182.           i.style.display = 'none';
  183.         }
  184.       } else if (name === 'abort') {
  185.         const index = e.target.parentNode.getAttribute('index') * 1;
  186.         const task = storage.list.find(i => i.request.index === index);
  187.         if (task && task.abort && typeof task.abort === 'function') task.abort();
  188.       } else {
  189.         // console.log(e.target, name);
  190.       }
  191.     });
  192.     document.body.appendChild(dialog);
  193.     storage.element.dialog = dialog;
  194.   };
  195.  
  196.   main.list = (urls, option, index = false, start = false) => {
  197.     // urls: string[], option: object
  198.     // urls: object[], option: undefined
  199.     for (const url of urls) {
  200.       const optionThis = Object.assign({}, option);
  201.       let request = typeof url === 'string' ? { url: url } : Object.assign({}, url);
  202.       if (!request.url) {
  203.         console.error('user-download: 缺少参数url');
  204.         continue;
  205.       }
  206.       request = Object.assign(optionThis, request);
  207.       request.raw = url;
  208.       request.index = storage.list.length;
  209.       if (typeof index === 'number') {
  210.         storage.list.splice(index, 0, { request });
  211.         index++;
  212.       } else {
  213.         storage.list.push({ request });
  214.       }
  215.     }
  216.     storage.element.dialog.querySelector('[name="total-progress"]').setAttribute('max', storage.list.length);
  217.     if (start && !storage.downloading) main.start();
  218.   };
  219.   main.add = (url, option, index, start) => main.list([url], option, index, start);
  220.   main.start = () => {
  221.     const startTask = (task) => {
  222.       task.status = 'downloading';
  223.       updateProgress(task);
  224.  
  225.       const request = Object.assign({}, task.request);
  226.       const tryCallFailed = (res, type) => {
  227.         delete task.abort;
  228.         if (!navigator.onLine) {
  229.           main.pause();
  230.           storage.element.dialog.querySelector('.nav-bar>[name="pause"]').value = 'resume';
  231.         }
  232.         task.retry = typeof task.retry === 'number' && !isNaN(task.retry) ? task.retry + 1 : 1;
  233.  
  234.         if (typeof task.request.onfailedEvery === 'function') {
  235.           task.request.onfailedEvery(res, task.request, type);
  236.         } else if (typeof storage.config.onfailedEvery === 'function') {
  237.           storage.config.onfailedEvery(res, task.request, type);
  238.         }
  239.         if (task.retry >= storage.config.retry) {
  240.           if (typeof task.request.onfailed === 'function') {
  241.             task.request.onfailed(res, task.request);
  242.           } else if (typeof storage.config.onfailed === 'function') {
  243.             storage.config.onfailed(res, task.request);
  244.           }
  245.         }
  246.       };
  247.       request.onabort = (res) => {
  248.         task.status = 'abort';
  249.         if (typeof task.request.onabort === 'function') {
  250.           task.request.onabort(res, task.request);
  251.         } else if (typeof storage.config.onabort === 'function') {
  252.           storage.config.onabort(res, task.request);
  253.         }
  254.         tryCallFailed(res, 'abort');
  255.         updateProgress(task, res);
  256.       };
  257.       request.onerror = (res) => {
  258.         task.status = 'error';
  259.         if (typeof task.request.onerror === 'function') {
  260.           task.request.onerror(res, task.request);
  261.         } else if (typeof storage.config.onerror === 'function') {
  262.           storage.config.onerror(res, task.request);
  263.         }
  264.         tryCallFailed(res, 'error');
  265.         updateProgress(task, res);
  266.       };
  267.       request.onload = async (res) => {
  268.         let success;
  269.         if (typeof task.request.checkLoad === 'function') {
  270.           success = await task.request.checkLoad(res);
  271.         } else if (typeof storage.config.checkLoad === 'function') {
  272.           success = await storage.config.checkLoad(res);
  273.         }
  274.         if (success === false) {
  275.           request.onerror(res);
  276.           return;
  277.         }
  278.  
  279.         task.status = 'load';
  280.         task.response = res;
  281.         delete task.abort;
  282.         delete task.retry;
  283.         if (typeof task.request.onload === 'function') {
  284.           task.request.onload(res, task.request);
  285.         } else if (typeof storage.config.onload === 'function') {
  286.           storage.config.onload(res, task.request);
  287.         }
  288.         updateProgress(task, res);
  289.       };
  290.       request.onprogress = (res) => {
  291.         if (typeof task.request.onprogress === 'function') {
  292.           task.request.onprogress(res, task.request);
  293.         } else if (typeof storage.config.onprogress === 'function') {
  294.           storage.config.onprogress(res, task.request);
  295.         }
  296.         updateProgress(task, res);
  297.       };
  298.       request.onreadystatechange = (res) => {
  299.         if (typeof task.request.onreadystatechange === 'function') {
  300.           task.request.onreadystatechange(res, task.request);
  301.         } else if (typeof storage.config.onreadystatechange === 'function') {
  302.           storage.config.onreadystatechange(res, task.request);
  303.         }
  304.         updateProgress(task, res);
  305.       };
  306.       request.ontimeout = (res) => {
  307.         task.status = 'timeout';
  308.         if (typeof task.request.ontimeout === 'function') {
  309.           task.request.ontimeout(res, task.request);
  310.         } else if (typeof storage.config.ontimeout === 'function') {
  311.           storage.config.ontimeout(res, task.request);
  312.         }
  313.         tryCallFailed(res, 'timeout');
  314.         updateProgress(task, res);
  315.       };
  316.       task.abort = xhr(request).abort;
  317.     };
  318.     const checkDownload = () => {
  319.       if (storage.pause) {
  320.         storage.downloading = false;
  321.         return;
  322.       }
  323.       while (storage.list.filter(i => i.status === 'downloading').length < storage.config.thread && storage.list.findIndex(i => i.status === undefined) >= 0) {
  324.         startTask(storage.list.find(i => i.status === undefined));
  325.       }
  326.       if (storage.list.findIndex(i => i.status === undefined) === -1) {
  327.         while (storage.list.filter(i => i.status === 'downloading').length < storage.config.thread && storage.list.findIndex(i => (i.retry || 0) < storage.config.retry && !(['downloading', 'load'].includes(i.status))) >= 0) {
  328.           startTask(storage.list.find(i => (i.retry || 0) < storage.config.retry && !(['downloading', 'load'].includes(i.status))));
  329.         }
  330.         if (storage.list.findIndex(i => i.status !== 'load' && (i.retry || 0) < storage.config.retry) === -1) {
  331.           storage.config.onComplete(storage.list);
  332.           storage.downloading = false;
  333.         } else {
  334.           setTimeout(checkDownload, 200);
  335.         }
  336.       } else {
  337.         setTimeout(checkDownload, 200);
  338.       }
  339.     };
  340.     storage.downloading = true;
  341.     checkDownload();
  342.   };
  343.   main.stop = () => {
  344.     storage.pause = true;
  345.     for (let i = 0; i < storage.list.length; i++) {
  346.       storage.list.retry = Infinity;
  347.       if (storage.list.abort) storage.list.abort();
  348.     }
  349.     storage.list = [];
  350.     storage.pause = false;
  351.   };
  352.  
  353.   main.pause = () => {
  354.     storage.pause = true;
  355.     for (const i of storage.list.filter(i => 'abort' in i)) i.abort();
  356.   };
  357.   main.resume = () => {
  358.     storage.pause = false;
  359.     if (!storage.downloading) main.start();
  360.   };
  361.   main.retry = () => {
  362.     for (const i of storage.list.filter(i => 'retry' in i)) storage.list[storage.list.indexOf(i)].retry = 0;
  363.     if (!storage.downloading) main.start();
  364.   };
  365.   main.showDialog = () => {
  366.     storage.element.dialog.style.display = 'block';
  367.   };
  368.   main.hideDialog = () => {
  369.     storage.element.dialog.style.display = 'none';
  370.   };
  371.   main.emptyDialog = () => {
  372.     storage.element.dialog.querySelectorAll('.task').innerHTML = '';
  373.   };
  374.   main.console = () => console.log(storage);
  375.   main.storage = {
  376.     get: (name, value) => name in storage ? storage[name] : value,
  377.     set: (name, value) => (storage[name] = value),
  378.     config: {
  379.       get: (name, value) => name in storage.config ? storage.config[name] : value,
  380.       set: (name, value) => (storage.config[name] = value)
  381.     },
  382.     getSelf: () => storage
  383.   };
  384.  
  385.   function xhr (url, onload, data = null, opt = {}) {
  386.     if (storage.config.debug) console.log({ url, data });
  387.     if (typeof url === 'object') {
  388.       opt = url;
  389.       url = opt.url;
  390.       data = opt.data;
  391.     }
  392.     opt.onload = onload || opt.onload;
  393.     if (opt.cache) {
  394.       const str = JSON.stringify({ url, data, opt });
  395.       const find = storage.cache.find(i => i[0] === str);
  396.       if (find) return find[1];
  397.     }
  398.     if ((storage.config.mode === 'gm_xhr' || !['gm_xhr', 'fetch', 'xhr'].includes(storage.config.mode)) && typeof GM_xmlhttpRequest === 'function') {
  399.       return GM_xmlhttpRequest({
  400.         url: url,
  401.         data: data,
  402.  
  403.         method: opt.method || (data ? 'POST' : storage.config.method || 'GET'),
  404.         user: opt.user || storage.config.user,
  405.         password: opt.password || storage.config.password,
  406.         overrideMimeType: opt.overrideMimeType || storage.config.overrideMimeType || `text/html; charset=${document.characterSet}`,
  407.         headers: opt.headers || storage.config.headers,
  408.         responseType: ['text', 'json', 'blob', 'arraybuffer', 'document'].includes(opt.responseType) ? opt.responseType : storage.config.responseType,
  409.         timeout: opt.timeout || storage.config.timeout,
  410.         anonymous: opt.anonymous || storage.config.anonymous,
  411.         onabort (res) {
  412.           (opt.onabort || storage.config.onabort)(res);
  413.         },
  414.         onerror (res) {
  415.           (opt.onerror || storage.config.onerror)(res);
  416.         },
  417.         onload (res) {
  418.           if (opt.cache) {
  419.             const str = JSON.stringify({ url, data, opt });
  420.             storage.cache.push([str, res]);
  421.           }
  422.           (opt.onload || storage.config.onload)(res);
  423.         },
  424.         onprogress (res) {
  425.           (opt.onprogress || storage.config.onprogress)(res);
  426.         },
  427.         onreadystatechange (res) {
  428.           (opt.onreadystatechange || storage.config.onreadystatechange)(res);
  429.         },
  430.         ontimeout (res) {
  431.           (opt.ontimeout || storage.config.ontimeout)(res);
  432.         }
  433.       });
  434.     }
  435.     if ((storage.config.mode === 'fetch' || !['gm_xhr', 'fetch', 'xhr'].includes(storage.config.mode)) && typeof window.fetch === 'function') { // TODO
  436.       // https://developer.mozilla.org/zh-CN/docs/Web/API/WindowOrWorkerGlobalScope/fetch
  437.       const controller = new window.AbortController();
  438.       const signal = controller.signal;
  439.       window.fetch(url, {
  440.         body: data,
  441.  
  442.         method: opt.method || (data ? 'POST' : storage.config.method || 'GET'),
  443.         // user: opt.user || storage.config.user,
  444.         // password: opt.password || storage.config.password,
  445.         // overrideMimeType: opt.overrideMimeType || storage.config.overrideMimeType || `text/html; charset=${document.characterSet}`,
  446.         // headers: opt.headers || storage.config.headers,
  447.         // responseType: ['text', 'json', 'blob', 'arraybuffer', 'document'].includes(opt.responseType) ? opt.responseType : storage.config.responseType,
  448.         // timeout: opt.timeout || storage.config.timeout,
  449.         // anonymous: opt.anonymous || storage.config.anonymous,
  450.  
  451.         signal
  452.       }).then(function (res) {
  453.         if (opt.cache) {
  454.           const str = JSON.stringify({ url, data, opt });
  455.           storage.cache.push([str, res]);
  456.         }
  457.         (opt.onload || storage.config.onload)(res);
  458.       }).catch(function (res) {
  459.         (opt.onerror || storage.config.onerror)(res);
  460.       });
  461.       return controller;
  462.     }
  463.     if ((storage.config.mode === 'xhr' || !['gm_xhr', 'fetch', 'xhr'].includes(storage.config.mode)) && typeof window.fetch === 'function') { // TODO
  464.       // https://developer.mozilla.org/zh-CN/docs/Web/API/XMLHttpRequest
  465.     }
  466.   }
  467.   function xhrSync (url, data = null, opt = {}) {
  468.     return new Promise((resolve, reject) => {
  469.       const optRaw = Object.assign({}, opt);
  470.       opt.onload = (res) => {
  471.         (optRaw.onload || storage.config.onload)(res);
  472.         resolve(res);
  473.       };
  474.       for (const event of ['onload', 'onabort', 'onerror', 'ontimeout']) {
  475.         opt[event] = (res) => {
  476.           (optRaw[event] && typeof optRaw[event] === 'function' ? optRaw[event] : storage.config[event])(res);
  477.           if (['onload'].includes(event)) {
  478.             resolve(res);
  479.           } else {
  480.             reject(res);
  481.           }
  482.         };
  483.       }
  484.       xhr(url, opt.onload, data, opt);
  485.     });
  486.   }
  487.  
  488.   window.xhr = main;
  489.   main.init();
  490. })(typeof window !== 'undefined' ? window : document);

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