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MyDownloader

包含多种下载方法的下载库

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.cn-greasyfork.org/scripts/515674/1581960/MyDownloader.js 

  1. // ==UserScript==
  2. // @name         MyDownloader
  3. // @version      2025.05.03
  4. // @description  包含多种下载方法的下载库
  5. // @author       You
  6. // @grant        none
  7. // @grant        GM_getValue
  8. // @grant        GM_setValue
  9. // @grant        GM_deleteValue
  10. // @grant        GM_download
  11. // @require https://update.greasyfork.org/scripts/480132/1476440/Get_all_img_Library.js
  12. // @require https://update.greasyfork.org/scripts/522187/1511410/Kquery.js
  13. // ==/UserScript==
  14. // 2025.01.07 更新了download text
  15. // 2025.01.07.02 更新了download text(src,name)
  16. // 2025.01.07.03 修复了download text(src,name)没有传入name的bug
  17. // 2025.05.03 修复isnowpage的bug
  18.  
  19.  
  20. /**
  21.  * 包含多种下载方法的下载类
  22.  * @example
  23.  const downloader = new Downloader();
  24.  downloader.Download_img(imgs);
  25. */
  26. function Downloader(){
  27. 	
  28. 	let downloading = 0;
  29. 	let downloaded = [];
  30. 	let downloadError = [];
  31. 	let imgs = null;
  32. 	let maxDownloadingCounts = 10;
  33. 	let timeout = null;
  34. 	let downloadType = ""
  35. 	let checkSrc = false;
  36. 	
  37. 	
  38. 	/**
  39. 	 * @example Download_img(imgs)
  40. 	 */
  41. 	this.Download_img = async (imgs)=>{
  42. 		Set_download(imgs)
  43. 		if(downloadType==""){
  44. 			Download_obo("GM_download");return;
  45. 		}
  46.  
  47. 		console.log(downloadType);
  48. 		if(downloadType=="GM_download"){
  49. 			Download_obo("GM_download");
  50. 		}else if(downloadType=="atag"){
  51. 			Download_obo("atag");
  52. 			console.log('download atag')
  53. 		}else if(downloadType=="blob"){
  54. 			Download_obo("blob");
  55. 		}else{
  56. 			alert("no this donwload type");
  57. 		}
  58. 	}
  59.  
  60. 	this.Set_downloadType = v => downloadType = v;
  61.  
  62. 	this.Set_maxDownloadingCounts = v => maxDownloadingCounts = v;
  63.  
  64. 	this.Set_timeout = v => timeout = v;
  65. 	
  66. 	this.Set_checkSrc = v => checkSrc = v;
  67. 	/**
  68. 	 * @example OneSuccess((success_img)=>{...})
  69. 	 */
  70. 	function OneSuccess(img){}
  71. 	this.OneSuccess = foo=>OneSuccess = foo;
  72. 	/**
  73. 	 * @example OneError((error_img)=>{...})
  74. 	 */
  75. 	function OneError(img){}
  76. 	this.OneError = foo=>OneError = foo;
  77. 	/**
  78. 	 * @example AllComplete(()=>{...})
  79. 	 */
  80. 	function AllComplete(){}
  81. 	this.AllComplete = foo=>AllComplete = foo;
  82. 	
  83. 	this.Set_download = (iimgs)=>{Set_download(iimgs);}
  84. 	function Set_download(iimgs){
  85. 		downloaded = [];
  86. 		downloading = 0;
  87. 		downloadError = [];
  88. 		imgs = iimgs;
  89. 	}
  90. 	function Download_obo(dtype){
  91. 		async function Download_one(i){
  92. 			if(i>=imgs.length){AllComplete();return;}
  93. 			if(downloading>=maxDownloadingCounts){setTimeout(()=>{Download_one(i)},1000);return;}
  94. 			const img = imgs.eq(i);
  95. 			downloading++;
  96. 			function success(img){
  97. 				OneSuccess(img);
  98. 				downloading--;
  99. 				downloaded.push(img);
  100. 				ConsoleWrite((downloaded.length+downloadError.length)+"/"+imgs.length)
  101. 			}
  102. 			function error(img){
  103. 				OneError(img);
  104. 				downloading--;
  105. 				downloadError.push(img);
  106. 			}
  107. 			switch(dtype){
  108. 				case "GM_download":
  109. 					Donwload_img_by_GM(img)
  110. 						.then(img=>success(img))
  111. 						.catch(img=>{
  112. 							dtype = "blob"
  113. 							Download_one(i);
  114. 						});
  115. 					break;
  116. 				case "blob":
  117. 					Download_img_by_blob(img)
  118. 						.then(img=>success(img))
  119. 						.catch(img=>{
  120. 							dtype = "atagIfram";
  121. 							Download_one(i);
  122. 						});
  123. 					break;
  124. 				case "atagIfram":
  125. 					Download_img_by_atag(img)
  126. 						.then(img=>success(img))
  127. 						.catch(img=>{
  128. 							error(img);
  129. 							dtype = "GM_download";
  130. 						});
  131. 					break;
  132. 			}
  133. 			Download_one(++i);
  134. 		}
  135. 		Download_one(0);
  136. 	}
  137. 	function ConsoleWrite(mass){
  138. 		if(window.GAIL){
  139. 			window.GAIL.showmass(mass);
  140. 		}
  141. 	}
  142. 	this.ConsoleWrite = foo=>ConsoleWrite = foo;
  143. 	
  144. 	this.Donwload_img_by_GM = img=>{Donwload_img_by_GM(img);}
  145. 	function Donwload_img_by_GM(img){
  146. 		return new Promise(async(resolve,reject)=>{
  147. 			if(!img){alert("img is empty");reject(img);return;}
  148. 			if(!GM_download){alert("GM_download is undefind");reject(img);return;}
  149. 			let name = '';
  150. 			let src = '';
  151. 			try{
  152. 				await Check_and_get_nameAndsrc({img:img,checkSrc:checkSrc})
  153. 						.then((m)=>{
  154. 							name = m.name;
  155. 							src = m.src;
  156. 							console.log(m);
  157. 						});
  158. 			}catch(error){
  159. 				reject(img);
  160. 				return;
  161. 			}
  162. 			console.log(name)
  163. 			console.log(src)
  164. 			GM_download({
  165. 				url:src,
  166. 				name:name,
  167. 				onload:function(){
  168. 					resolve(img);
  169. 				},
  170. 				onerror:function(){
  171. 					reject(img);
  172. 				},
  173. 				onprogress:function(){
  174. 					
  175. 				}
  176. 			});
  177. 			if(timeout){
  178. 				setTimeout(()=>{
  179. 					reject(img);
  180. 				},timeout);
  181. 			}
  182. 		})
  183. 	}
  184. 	
  185. 	this.Download_img_by_blob = (img)=>{Download_img_by_blob(img);}
  186. 	function Download_img_by_blob(img){
  187. 		return new Promise(async(rs,rj)=>{
  188. 			if(!img){alert("imgs is empty");rj(img);return;}
  189. 			
  190. 			let name = '';
  191. 			let src = '';
  192. 			try{
  193. 				await Check_and_get_nameAndsrc({img:img,checkSrc:checkSrc})
  194. 						.then((m)=>{
  195. 							name = m.name;
  196. 							src = m.src;
  197. 							console.log(m);
  198. 						});
  199. 			}catch(error){
  200. 				rj(img);
  201. 				return;
  202. 			}
  203. 			UrlToBlob({url:src,timeout:timeout})
  204. 				.then(blob=>{
  205. 					let a = $('<a></a>').attr({
  206. 						download:name,
  207. 						href:blob
  208. 					})
  209. 					a[0].click();
  210. 					rs(img);
  211. 				})
  212. 				.catch(er=>{
  213. 					console.log(er);
  214. 					rj(img);
  215. 				});
  216. 			if(timeout){
  217. 				setTimeout(()=>{
  218. 					rj(img);
  219. 				},timeout)
  220. 			}
  221. 		})
  222. 	}
  223. 	
  224. 	this.Download_img_by_atag = (img,nowIsImgPage)=>{Download_img_by_atag(img,nowIsImgPage);}
  225. 	async function Download_img_by_atag(img,nowIsImgPage) {
  226. 		return new Promise(async(resolve,reject)=>{
  227. 			if(!img){alert("imgs is empty");reject(img);return;}
  228. 			if(!GM_setValue){alert("GM_setValue is underfind");reject(img);return;}
  229. 			if (!nowIsImgPage) {
  230. 				let name = '';
  231. 				let src = '';
  232. 				try{
  233. 					await Check_and_get_nameAndsrc({img:img,checkSrc:checkSrc})
  234. 							.then((m)=>{
  235. 								name = m.name;
  236. 								src = m.src;
  237. 								console.log(m);
  238. 							});
  239. 				}catch(error){
  240. 					reject(img);
  241. 					return;
  242. 				}
  243. 				GM_setValue("downloadType", "start");
  244. 				GM_setValue("downloadName", name);
  245. 				GM_setValue("downloadSrc", src);
  246. 				let mi = new My_iframe();
  247. 				let iframe;
  248. 				let isTimeout = false;
  249. 				if(timeout){
  250. 					setTimeout(()=>{isTimeout = true;},timeout)
  251. 				}
  252. 				await mi.Add_iframe(src).then(ifr=>iframe = ifr);
  253. 				
  254. 				const checkDownload = setInterval(() => {
  255. 					if (GM_getValue("downloadType") === "end") {
  256. 						$(iframe).remove();
  257. 						resolve(img);
  258. 						clearInterval(checkDownload);
  259. 						return;
  260. 					}
  261. 					if(isTimeout){
  262. 						reject(img);
  263. 					}
  264. 				}, 100);
  265. 			}else {
  266. 				const newimg = $("img").attr({
  267. 					name:GM_getValue("downloadName"),
  268. 				})
  269. 				await Check_and_get_nameAndsrc({img:newimg,checkSrc:true})
  270. 						.then((m)=>{
  271. 							let name = m.name;
  272. 							let src = m.src;
  273. 							$('<a></a>').attr({
  274. 								'href': src,
  275. 								'download': name,
  276. 							})[0].click();
  277. 						});
  278. 				await new Promise(resolve => setTimeout(resolve, 1000));
  279. 				GM_setValue("downloadType", "end");
  280. 				window.close();
  281. 			}
  282. 			
  283. 		})
  284. 	}
  285. 	this.Listening_Download_by_atag = ()=>{
  286. 		const locationHref = window.location.href;
  287. 		const GM_downloadSrc = GM_getValue("downloadSrc");
  288. 		if(!GM_downloadSrc){return;}
  289. 		if(GM_downloadSrc == locationHref|| locationHref.indexOf(GM_downloadSrc)>=0 || GM_downloadSrc.indexOf(locationHref)>=0 ){
  290. 			Download_img_by_atag($("img"),true);
  291. 		}
  292. 	}
  293. 	
  294. 	
  295. 	/**
  296. 	 * @example Urls({url:url,timeout : 100})
  297.     */
  298.    this.UrlToBlob = (args)=>{UrlToBlob(args);}
  299. 	async function UrlToBlob(args) {
  300. 		return new Promise((resolve,reject)=>{
  301. 			if(!args.url){reject("no url");}
  302. 			if(args.timeout){
  303. 				const timeout = setTimeout(function() {reject("fetch timeout")}, args.timeout);
  304. 			}
  305. 			fetch(args.url)
  306. 					.then(response => {
  307. 						const contentLength = response.headers.get('Content-Length');
  308. 						const total = parseInt(contentLength, 10);
  309. 						let loaded = 0;
  310. 			
  311. 						// 克隆响应以便分别读取流和获得 Blob
  312. 						const clonedResponse = response.clone();
  313. 						const reader = clonedResponse.body.getReader();
  314. 			
  315. 						// 更新进度的函数
  316. 						function updateProgress({ done, value }) {
  317. 							if (done) {
  318. 								return; // 如果读取完毕，直接返回
  319. 							}
  320. 							loaded += value.byteLength; // 累加已加载字节
  321. 							const progress = (loaded / total) * 100; // 计算进度百分比
  322. 							console.log(`Loading: ${progress.toFixed(2)}%`);
  323. 							FetchShowProgress(progress);
  324. 							// 继续读取下一块数据
  325. 							return reader.read().then(updateProgress);
  326. 						}
  327. 			
  328. 						// 开始读取流以更新进度
  329. 						return reader.read().then(updateProgress).then(() => {
  330. 							// 完成后返回原始响应的 Blob
  331. 							return response.blob();
  332. 						});
  333. 					})
  334. 					.then(blob => {
  335. 						const blobUrl = URL.createObjectURL(blob);
  336. 						resolve(blobUrl);
  337. 					})
  338. 					.catch(error => {
  339. 						console.error('Error caching video:', error);
  340. 						reject(error);
  341. 					});
  342. 		});
  343. 	}
  344. 	this.FetchShowProgress = (pro)=>{FetchShowProgress(pro);}
  345. 	function FetchShowProgress(pro){
  346. 		if(this.maxDownloadingCounts==1 && this.imgs.length==1){
  347. 			window.GAIL.showmass(pro);
  348. 			$(".mass_top").css('font-size',"10vmin");
  349. 		}
  350. 	}
  351. 	
  352. 	this.Check_and_get_nameAndsrc = (args)=>{Check_and_get_nameAndsrc(args);}
  353. 	function Check_and_get_nameAndsrc(args){
  354. 		return new Promise(async (resolve,reject)=>{
  355. 			if(!args || !args.img){return reject();}
  356. 			let src = args.img.attr('big_src')||args.img.attr('big-src');
  357. 			if(!src){src = args.img.attr('src');}
  358. 			if(!src){src = args.img.attr('small_src')||args.img.attr('small-src');}
  359. 			if(!src){reject();}
  360. 			//console.log("check:"+src)
  361. 			if(args.checkSrc){
  362. 				try{
  363. 					await check_src_is_right(src);
  364. 				}catch(error){
  365. 					reject();
  366. 				}
  367. 			}
  368. 			let ext = src.match(/\.jpg|\.png|\.webp|\.gif|\.bmp/g);
  369. 			if(!ext){ext = '.png';}else{ext = ext[0];}
  370. 			let name = args.img.attr('name');
  371. 			if(!name){name = document.title + new Date().getTime() + Math.floor(Math.random()*100) + ext;}
  372. 			resolve({name:name,src:src,img:args.img});
  373. 		});
  374. 	}
  375. 	function generateUUID() {
  376. 	  return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c =>
  377. 	    (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
  378. 	  );
  379. 	}
  380.  
  381. 	
  382. 	this.check_src_is_right = (src)=>{check_src_is_right(src);}
  383. 	function check_src_is_right(src){
  384. 		return new Promise((resolve,reject)=>{
  385. 			let iimg = new Image();
  386. 			iimg.onload = function(){
  387. 				if(this.width*this.height*this.naturalWidth*this.naturalHeight==0){reject();}else{resolve();}
  388. 			}
  389. 			iimg.onerror = function(){reject();}
  390. 			iimg.src = src;
  391. 			setTimeout(function() {reject();}, 2000);
  392. 		})
  393. 	}
  394. 	
  395. 	function downloadText(text,name) {
  396. 	 
  397. 	    // 创建 Blob 对象
  398. 	    var blob = new Blob([text], { type: "text/plain" });
  399. 	 
  400. 	    // 创建下载链接
  401. 	    var url = URL.createObjectURL(blob);
  402. 	 
  403. 	    // 创建下载按钮
  404. 	    var a = document.createElement("a");
  405. 	    a.href = url;
  406. 	    a.download = name?name:"downloaded_text"+new Date().getTime()+".txt"; // 文件名
  407. 	    document.body.appendChild(a);
  408. 	 
  409. 	    // 模拟点击下载
  410. 	    a.click();
  411. 	 
  412. 	    // 清理
  413. 	    window.URL.revokeObjectURL(url);
  414. 	    document.body.removeChild(a);
  415. 	}
  416. 	this.Download_to_text = (url,name)=>{downloadText(url,name);}
  417. }
  418. $(function(){
  419. 	let dd = new Downloader()
  420. 	dd.Listening_Download_by_atag()
  421. })
  422.  
  423. window.Downloader = Downloader;