☰

百度翻译

用户脚本版的百度翻译API支持，无需申请token，@require即用

目前为 2023-04-15 提交的版本。查看 最新版本。

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.gf.qytechs.cn/scripts/452362/1175970/Baidu%20Translate.js 

  1. /* eslint-disable no-multi-spaces */
  2.  
  3. // ==UserScript==
  4. // @name               Baidu Translate
  5. // @name:zh-CN         百度翻译
  6. // @name:en            Baidu Translate
  7. // @namespace          PY-DNG APIS
  8. // @version            0.2.5
  9. // @description        Baidu translate api support for userscripts. No need for baidu's token.
  10. // @description:zh-CN  用户脚本版的百度翻译API支持，无需申请token，@require即用
  11. // @description:en     Baidu translate api support for userscripts. No need for baidu's token.
  12. // @author             PY-DNG
  13. // @license            MIT
  14. // @icon               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  15. // @grant              GM_xmlhttpRequest
  16. // @connect            fanyi.baidu.com
  17. // ==/UserScript==
  18.  
  19. /* Usage:
  20. ** baidu_translate(details): details = {
  21.        text: <string> Text you want to translate.
  22. 	         Required argument, no default value.
  23.        callback: <function> Callback function when translation succeed,
  24. 	             e.g. function(result) {console.log(result);}.
  25. 				 Argument `result` will be <string> translate result.
  26. 	             Required argument, no default value.
  27.        [src]: <string> Source language; e.g. 'zh' for Chinese, 'en' for English, 'ja' for Japanese, ....
  28. 	          Default: Auto detect.
  29.        [dst]: <string> Destination language,
  30. 	          Default: 'zh'.
  31.        [split]: <number> Text spliting max length, just leave blank if you don't know what this means.
  32. 	            What it is: Baidu has limited that up to 5000 letters can be translated each single API
  33. 	            request, so the translate function will split text by about every ${split} letters, and
  34. 				translates each of them with a single API request then concatenate the translate result
  35. 				together again. Don't worry if any sentence to be splited, actually the translate
  36. 				function splits text with '\n' first, then concatenate the '\n'-splited strings as long
  37. 				as possible while keeping its length <= ${split}.
  38. 	            Default: 5000
  39.        [onerror]: <function> Callback function when translation failed,
  40. 	              e.g. function(reason) {console.log(reason);}.
  41. 				  Argument: `reason` may be anything that causes its failure, just for debugging and do
  42. 				  not use it in production.
  43. 	              Default: function() {}.
  44.        [retry]: <number> Times to retry before onerror function being called or an error being thrown,
  45. 	            Default: 3.
  46.    }
  47. ** Or:
  48. ** baidu_translate(text, src, dst, callback, onerror, split, retry)
  49. **
  50. ** Overloads:
  51. ** baidu_translate(text, src, dst, callback, onerror, split)
  52. ** baidu_translate(text, dst, callback, onerror, split)
  53. ** baidu_translate(text, callback, onerror, split)
  54. ** baidu_translate(text, callback, onerror)
  55. ** baidu_translate(text, callback)
  56. */
  57.  
  58. let baidu_translate, bdTransReady;
  59. [baidu_translate, bdTransReady] = (function() {
  60. 	const BDT = new BaiduTranslateAPI();
  61. 	return [baidu_translate, bdTransReady];
  62.  
  63. 	function baidu_translate() {
  64. 		// Check BDT ready
  65. 		if (!BDT.gtk || !BDT.token) {
  66. 			//throw new Error('BaiduTranslateAPI not ready');
  67. 			return false;
  68. 		}
  69.  
  70. 		// Get argument
  71. 		const [text, src, dst, callback, onerror, split, retry] = parseArgs([...arguments], [
  72. 			function(args, defaultValues) {
  73. 				const details = args[0];
  74. 				const parsed = [...defaultValues];
  75. 				details.hasOwnProperty('text') && (parsed[0] = details.text);
  76. 				details.hasOwnProperty('src') && (parsed[1] = details.src);
  77. 				details.hasOwnProperty('dst') && (parsed[2] = details.dst);
  78. 				details.hasOwnProperty('callback') && (parsed[3] = details.callback);
  79. 				details.hasOwnProperty('onerror') && (parsed[4] = details.onerror);
  80. 				details.hasOwnProperty('split') && (parsed[5] = details.split);
  81. 				details.hasOwnProperty('retry') && (parsed[6] = details.retry);
  82. 				return parsed;
  83. 			},
  84. 			[1,4],
  85. 			[1,4,5],
  86. 			[1,4,5,6],
  87. 			[1,3,4,5,6],
  88. 			[1,2,3,4,5,6],
  89. 			[1,2,3,4,5,6,7]
  90. 		], ['', undefined, undefined, function() {}, function() {}, 5000, 3]);
  91.  
  92. 		// Split lines
  93. 		const textarr = text.replaceAll('\r\n', '\n').replaceAll('\n\r', '\n').replaceAll('\r', '\n').split('\n');
  94. 		if (textarr.some((t) => (t.length > split))) {
  95. 			throw new Error('Some paragraph is longer than given split length (' + split + ')');
  96. 		}
  97.  
  98. 		// Prepare
  99. 		const AM = new AsyncManager();
  100. 		const result = [];
  101. 		AM.onfinish = function() {
  102. 			callback(result.map(re => '\n'.repeat(re.newline_begin) + re.dst + '\n'.repeat(re.newline_end)).join('\n'));
  103. 		}
  104.  
  105. 		// Send requests
  106. 		let index = 0;
  107. 		while (textarr.length > 0) {
  108. 			// Join translate api paragraph
  109. 			let para = '';
  110. 			while (textarr.length > 0 && para.length + textarr[0].length < split) {
  111. 				para += '\n' + textarr.shift();
  112. 			}
  113. 			para = para.substr(1);
  114.  
  115. 			// Whether this paragraph contains \n at beginning
  116. 			const countNewLine = str => str.split('').filter(t => t === '\n').length;
  117. 			const newline_begin = countNewLine(para.match(/^\s*/) ? para.match(/^\s*/)[0] : '');
  118. 			const newline_end = countNewLine(para.match(/^\s*/) ? para.match(/\s*$/)[0] : '');
  119. 			result[index] = {src: para, dst: null, newline_begin, newline_end};
  120.  
  121. 			// API request
  122. 			AM.add();
  123. 			BDT.translate({
  124. 				text: para,
  125. 				args: [index],
  126. 				src: src,
  127. 				dst: dst,
  128. 				onerror: onerror,
  129. 				retry: retry,
  130. 				callback: function(json, i) {
  131. 					const temp_result = json.trans_result.data.reduce(function(pre, cur) {
  132. 						return (pre.push('\n'.repeat(cur.prefixWrap) + cur.dst), pre);
  133. 					}, []).join('\n');
  134. 					result[i].dst = temp_result;
  135. 					AM.finish();
  136. 				}
  137. 			});
  138. 			index++;
  139. 		}
  140. 		AM.finishEvent = true;
  141.  
  142. 		return true;
  143. 	}
  144.  
  145. 	function bdTransReady(callback) {
  146. 		const callbacks = [];
  147. 		BDT.oninit = dispatchCallback;
  148. 		bdTransReady = bdTransReady_inner;
  149. 		bdTransReady_inner();
  150.  
  151. 		function dispatchCallback() {
  152. 			callbacks.forEach(cb => cb());
  153. 			callbacks.splice(0, Infinity);
  154. 		}
  155.  
  156. 		function bdTransReady_inner() {
  157. 			callbacks.push(callback);
  158. 		}
  159. 	}
  160.  
  161. 	function BaiduTranslateAPI() {
  162. 		const BT = this;
  163. 		BT.gtk = BT.token = null;
  164. 		BT.inited = false;
  165.  
  166. 		let oninit=function() {};
  167. 		Object.defineProperty(BT, 'oninit', {
  168. 			enumerable: true,
  169. 			set: (f) => (typeof f === 'function' && (oninit = f) && BT.inited && oninit()),
  170. 			get: () => (oninit)
  171. 		});
  172.  
  173. 		init();
  174.  
  175. 		BT.calcSign = calcSign;
  176. 		BT.translate = translate;
  177.  
  178. 		async function translate(details) {
  179. 			const callback = details.callback;
  180. 			const text = details.text;
  181. 			const src = details.src || await langDetect(text);
  182. 			const dst = details.dst || 'zh';
  183. 			const onerror = details.onerror || function() {};
  184. 			const retry = details.retry || 0;
  185. 			const args = details.args || [];
  186.  
  187. 			GM_xmlhttpRequest({
  188. 				method: 'POST',
  189. 				url: 'https://fanyi.baidu.com/v2transapi',
  190. 				headers: {
  191. 					'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36',
  192. 					'Content-Type': 'application/x-www-form-urlencoded'
  193. 				},
  194. 				data: toQueryString({
  195. 					'from': src,
  196. 					'to': dst,
  197. 					'query': text,
  198. 					'simple_means_flag': 3,
  199. 					'sign': calcSign(text),
  200. 					'token': BT.token
  201. 				}),
  202. 				onload: function(response) {
  203. 					response.status !== 200 && Err(response);
  204. 					const json = JSON.parse(response.responseText);
  205. 					json.error && Err(json);
  206. 					callback.apply(null, [json].concat(args));
  207.  
  208. 					function Err(e) {
  209. 						!_onerror(e) && console.log('Retrying...\nleft: ' + (retry-1).toString());
  210. 						console.log(e);
  211. 						throw new Error('Server returned with an error (logged above)');
  212. 					}
  213. 				},
  214. 				onerror: _onerror,
  215. 				ontimeout: _onerror,
  216. 				onabort: _onerror,
  217. 			});
  218.  
  219. 			// Returns true for error, false for retry
  220. 			function _onerror(e) {
  221. 				console.log('sign = ' + calcSign(text));
  222. 				if (retry > 0) {
  223. 					setTimeout(retryRequest.bind(null, e), 500);
  224. 					return false;
  225. 				}
  226. 				onerror(e);
  227. 				return true;
  228. 			}
  229.  
  230. 			function retryRequest(e) {
  231. 				translate({
  232. 					callback: callback,
  233. 					text: text,
  234. 					src: src,
  235. 					dst: dst,
  236. 					onerror: onerror,
  237. 					retry: retry - 1,
  238. 					args: args
  239. 				});
  240. 			}
  241. 		}
  242.  
  243. 		function langDetect(text) {
  244. 			return new Promise((resolve, reject) => {
  245. 				GM_xmlhttpRequest({
  246. 					method: 'POST',
  247. 					url: 'https://fanyi.baidu.com/langdetect',
  248. 					headers: {
  249. 						'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36',
  250. 						'Content-Type': 'application/x-www-form-urlencoded'
  251. 					},
  252. 					data: toQueryString({'query': text}),
  253. 					onload: function(response) {
  254. 						const json = JSON.parse(response.responseText);
  255. 						resolve(json.lan);
  256. 					},
  257. 					onerror: function(e) {reject(e)},
  258. 					ontimeout: function(e) {reject(e)},
  259. 					onabort: function(e) {reject(e)},
  260. 				});
  261. 			});
  262. 		}
  263.  
  264. 		// Calc sign based on query-text and gtk
  265. 		function calcSign(query) {
  266. 			function a(r, o) {
  267. 				for (var t = 0; t < o.length - 2; t += 3) {
  268. 					var a = o.charAt(t + 2);
  269. 					a = a >= "a" ? a.charCodeAt(0) - 87 : Number(a),
  270. 						a = "+" === o.charAt(t + 1) ? r >>> a: r << a,
  271. 						r = "+" === o.charAt(t) ? r + a & 4294967295 : r ^ a
  272. 				}
  273. 				return r
  274. 			}
  275. 			var C = null;
  276. 			var token = function(r, _gtk) {
  277. 				var o = r.length;
  278. 				o > 30 && (r = "" + r.substr(0, 10) + r.substr(Math.floor(o / 2) - 5, 10) + r.substring(r.length, r.length - 10));
  279. 				var t = void 0,
  280. 					t = null !== C ? C: (C = _gtk || "") || "";
  281. 				for (var e = t.split("."), h = Number(e[0]) || 0, i = Number(e[1]) || 0, d = [], f = 0, g = 0; g < r.length; g++) {
  282. 					var m = r.charCodeAt(g);
  283. 					128 > m ? d[f++] = m: (2048 > m ? d[f++] = m >> 6 | 192 : (55296 === (64512 & m) && g + 1 < r.length && 56320 === (64512 & r.charCodeAt(g + 1)) ? (m = 65536 + ((1023 & m) << 10) + (1023 & r.charCodeAt(++g)), d[f++] = m >> 18 | 240, d[f++] = m >> 12 & 63 | 128) : d[f++] = m >> 12 | 224, d[f++] = m >> 6 & 63 | 128), d[f++] = 63 & m | 128)
  284. 				}
  285. 				for (var S = h,
  286. 					 u = "+-a^+6",
  287. 					 l = "+-3^+b+-f",
  288. 					 s = 0; s < d.length; s++) S += d[s],
  289. 					S = a(S, u);
  290.  
  291. 				return S = a(S, l),
  292. 					S ^= i,
  293. 					0 > S && (S = (2147483647 & S) + 2147483648),
  294. 					S %= 1e6,
  295. 					S.toString() + "." + (S ^ h)
  296. 			}
  297.  
  298. 			return token(query, BT.gtk);
  299. 		}
  300.  
  301. 		function toQueryString(obj) {
  302. 			const USP = new URLSearchParams();
  303. 			for (const [key, value] of Object.entries(obj)) {
  304. 				USP.append(key, value);
  305. 			}
  306. 			return USP.toString();
  307. 		}
  308.  
  309. 		// Request token and gtk
  310. 		function init() {
  311. 			// Request twice, make sure gtk is latest,
  312. 			// or may get 998 error while requesting translate API
  313. 			requestIndex(requestIndex.bind(null, function(html) {
  314. 				BT.token = html.match(/token: ["'](.*?)["'],/)[1];
  315. 				BT.gtk = html.match(/window.gtk = ["'](.*?)["'];/)[1];
  316. 				BT.inited = true;
  317. 				oninit();
  318. 			}));
  319.  
  320. 			function requestIndex(callback) {
  321. 				const url = 'https://fanyi.baidu.com';
  322. 				GM_xmlhttpRequest({
  323. 					method: 'GET',
  324. 					headers: {
  325. 						'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'
  326. 					},
  327. 					url: url,
  328. 					onload: function(response) {
  329. 						callback(response.responseText);
  330. 					}
  331. 				});
  332. 			}
  333. 		}
  334. 	}
  335.  
  336. 	function AsyncManager() {
  337. 		const AM = this;
  338.  
  339. 		// Ongoing xhr count
  340. 		this.taskCount = 0;
  341.  
  342. 		// Whether generate finish events
  343. 		let finishEvent = false;
  344. 		Object.defineProperty(this, 'finishEvent', {
  345. 			configurable: true,
  346. 			enumerable: true,
  347. 			get: () => (finishEvent),
  348. 			set: (b) => {
  349. 				finishEvent = b;
  350. 				b && AM.taskCount === 0 && AM.onfinish && AM.onfinish();
  351. 			}
  352. 		});
  353.  
  354. 		// Add one task
  355. 		this.add = () => (++AM.taskCount);
  356.  
  357. 		// Finish one task
  358. 		this.finish = () => ((--AM.taskCount === 0 && AM.finishEvent && AM.onfinish && AM.onfinish(), AM.taskCount));
  359. 	}
  360.  
  361. 	function parseArgs(args, rules, defaultValues=[]) {
  362. 		// args and rules should be array, but not just iterable (string is also iterable)
  363. 		if (!Array.isArray(args) || !Array.isArray(rules)) {
  364. 			throw new TypeError('parseArgs: args and rules should be array')
  365. 		}
  366.  
  367. 		// fill rules[0]
  368. 		(!Array.isArray(rules[0]) || rules[0].length === 1) && rules.splice(0, 0, []);
  369.  
  370. 		// max arguments length
  371. 		const count = rules.length - 1;
  372.  
  373. 		// args.length must <= count
  374. 		if (args.length > count) {
  375. 			throw new TypeError(`parseArgs: args has more elements(${args.length}) longer than ruless'(${count})`);
  376. 		}
  377.  
  378. 		// rules[i].length should be === i if rules[i] is an array, otherwise it should be a function
  379. 		for (let i = 1; i <= count; i++) {
  380. 			const rule = rules[i];
  381. 			if (Array.isArray(rule)) {
  382. 				if (rule.length !== i) {
  383. 					throw new TypeError(`parseArgs: rules[${i}](${rule}) should have ${i} numbers, but given ${rules[i].length}`);
  384. 				}
  385. 				if (!rule.every((num) => (typeof num === 'number' && num <= count))) {
  386. 					throw new TypeError(`parseArgs: rules[${i}](${rule}) should contain numbers smaller than count(${count}) only`);
  387. 				}
  388. 			} else if (typeof rule !== 'function') {
  389. 				throw new TypeError(`parseArgs: rules[${i}](${rule}) should be an array or a function.`)
  390. 			}
  391. 		}
  392.  
  393. 		// Parse
  394. 		const rule = rules[args.length];
  395. 		let parsed;
  396. 		if (Array.isArray(rule)) {
  397. 			parsed = [...defaultValues];
  398. 			for (let i = 0; i < rule.length; i++) {
  399. 				parsed[rule[i]-1] = args[i];
  400. 			}
  401. 		} else {
  402. 			parsed = rule(args, defaultValues);
  403. 		}
  404. 		return parsed;
  405. 	}
  406. }) ();

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