fastfile/src/index.js at main · servless/fastfile · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
// src/index.js

const title = '文件加速下载';
const subtitle = '快速下载网络文件';
const inputPlaceholder = '请输入下载链接';
const tips = '按回车键执行下载';
const githubUrl = 'https://github.com/servless/fastfile';

const footerJS = `
<script charset="UTF-8" id="LA_COLLECT" src="//sdk.51.la/js-sdk-pro.min.js"></script>
<script>LA.init({id:"KjS1VsJ98ywewicI",ck:"KjS1VsJ98ywewicI"})</script>
`;

const logoSVG = (size = 120) => {
	return `<svg xmlns="http://www.w3.org/2000/svg" width="${size}" height="${size}" fill="currentColor" class="bi bi-cloud-arrow-down" viewBox="0 0 16 16">
	<path fill-rule="evenodd" d="M7.646 10.854a.5.5 0 0 0 .708 0l2-2a.5.5 0 0 0-.708-.708L8.5 9.293V5.5a.5.5 0 0 0-1 0v3.793L6.354 8.146a.5.5 0 1 0-.708.708z"/>
	<path d="M4.406 3.342A5.53 5.53 0 0 1 8 2c2.69 0 4.923 2 5.166 4.579C14.758 6.804 16 8.137 16 9.773 16 11.569 14.502 13 12.687 13H3.781C1.708 13 0 11.366 0 9.318c0-1.763 1.266-3.223 2.942-3.593.143-.863.698-1.723 1.464-2.383m.653.757c-.757.653-1.153 1.44-1.153 2.056v.448l-.445.049C2.064 6.805 1 7.952 1 9.318 1 10.785 2.23 12 3.781 12h8.906C13.98 12 15 10.988 15 9.773c0-1.216-1.02-2.228-2.313-2.228h-.5v-.5C12.188 4.825 10.328 3 8 3a4.53 4.53 0 0 0-2.941 1.1z"/>
	</svg>`;
};

let AntiReptilianUA = ['netcraft'];

// 根据主机名选择对应的上游地址
function routeByHosts(host) {
  // 定义路由表
  const routes = {
    // 生产环境
    "quay": "quay.io",
    "gcr": "gcr.io",
    "k8s-gcr": "k8s.gcr.io",
    "k8s": "registry.k8s.io",
    "ghcr": "ghcr.io",
    "cloudsmith": "docker.cloudsmith.io",
    "nvcr": "nvcr.io",
		"github": "github.com",
		"gitlab": "gitlab.com",

    // 测试环境
    "test": "registry-1.docker.io",
  };

  if (host in routes) {
		return [routes[host], true];
  }

  return [host, false];
}

// 严格检测 URL 是否合法
function isStrictValidUrl(urlString) {
	// 要求必须有 http(s):// 开头，并且域名中必须包含至少一个点（.）和合法的 TLD（至少2个字母）
	const regex = /^https?:\/\/((?:[a-zA-Z0-9-]+\.)+[a-zA-Z]{2,})(\/[^\s]*)?$/;
	return regex.test(urlString);
  }

/** @type {RequestInit} */
const PREFLIGHT_INIT = {
  // 预检请求配置
  headers: new Headers({
    'access-control-allow-origin': '*', // 允许所有来源
    'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS', // 允许的HTTP方法
    'access-control-max-age': '1728000', // 预检请求的缓存时间
  }),
};

/**
 * 构造响应
 * @param body 响应体
 * @param status 响应状态码
 * @param headers 响应头
 */
function makeRes(
  body,
  status = 200,
  headers = {}
) {
  headers['access-control-allow-origin'] = '*'; // 允许所有来源
  return new Response(body, { status, headers });
}

/**
 * 构造新的URL对象
 * @param urlStr URL字符串
 */
function newUrl(urlStr) {
  try {
    // console.log(`Constructing new URL object with path ${urlStr}`);
    return new URL(urlStr);
  } catch (err) {
    console.error(err);
    return null;
  }
}

async function nginx() {
  const text = `
  <!DOCTYPE html>
  <html>
  <head>
  <title>Welcome to nginx!</title>
  <style>
    body {
      width: 35em;
      margin: 0 auto;
      font-family: Tahoma, Verdana, Arial, sans-serif;
    }
  </style>
  </head>
  <body>
  <h1>Welcome to nginx!</h1>
  <p>If you see this page, the nginx web server is successfully installed and
  working. Further configuration is required.</p>

  <p>For online documentation and support please refer to
  <a href="http://nginx.org/">nginx.org</a>.<br/>
  Commercial support is available at
  <a href="http://nginx.com/">nginx.com</a>.</p>

  <p><em>Thank you for using nginx.</em></p>
  </body>
  </html>
  `;
  return text;
}

async function searchInterface() {
  const html = `
  <!DOCTYPE html>
  <html>
  <head>
    <title>${title}</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
    :root {
      --github-color: #f0f6fc;
      --githubbj-color: #010409;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      display: flex;
      flex-direction: column;
      justify-content: center; // 新增
      align-items: center;
      min-height: 100vh;
      margin: 0;
      background: linear-gradient(120deg, #1a90ff 0%, #003eb3 100%);
      padding: 20px;
    }

    .container {
      text-align: center;
      width: 100%;
      max-width: 800px;
      padding: 0 20px;
      margin: 0 auto; // 修改
      display: flex; // 新增
      flex-direction: column; // 新增
      justify-content: center; // 新增
      min-height: 70vh; // 新增
    }

    .github-corner {
      position: fixed;
      top: 0;
      right: 0;
      z-index: 999;
    }

    .github-corner svg {
      fill: var(githubbj-color);
      color: var(--github-color);
      position: absolute;
      top: 0;
      border: 0;
      right: 0;
      width: 80px;
      height: 80px;
    }

    .github-corner a,
    .github-corner a:visited {
    color: var(--github-color) !important;
    }

    .github-corner a,
    .github-corner a:visited {
    color: transparent !important;
    text-decoration: none !important;
    }

    .github-corner .octo-body,
    .github-corner .octo-arm {
    fill: var(--github-color) !important;
    }

    .github-corner:hover .octo-arm {
      animation: octocat-wave 560ms ease-in-out;
    }

    @keyframes octocat-wave {
      0%, 100% {
        transform: rotate(0);
      }
      20%, 60% {
        transform: rotate(-25deg);
      }
      40%, 80% {
        transform: rotate(10deg);
      }
    }

    .logo {
      margin-bottom: 30px;
      transition: transform 0.3s ease;
    }
    .logo:hover {
      transform: scale(1.05);
    }
    .title {
      color: white;
      font-size: 2em;
      margin-bottom: 10px;
      text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    .subtitle {
      color: rgba(255,255,255,0.9);
      font-size: 1.1em;
      margin-bottom: 30px;
    }
    .search-container {
      display: flex;
      align-items: stretch;
      width: 100%;
      max-width: 600px;
      margin: 0 auto;
      height: 50px;
    }
    #search-input {
      flex: 1;
      padding: 15px 20px;
      font-size: 16px;
      border: none;
      border-radius: 8px 0 0 8px;
      outline: none;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      transition: all 0.3s ease;
    }
    #search-input {
      flex: 1;
      padding: 0 20px;
      font-size: 16px;
      border: none;
      border-radius: 8px 0 0 8px;
      outline: none;
      box-shadow: 0 2px 6px rgba(0,0,0,0.1);
      transition: all 0.3s ease;
      height: 100%;
    }
    #search-button {
      padding: 0 25px;
      background-color: #0066ff;
      border: none;
      border-radius: 0 8px 8px 0;
      cursor: pointer;
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    #search-button:hover {
      background-color: #0052cc;
      transform: translateY(-1px);
    }
    #search-button svg {
      width: 24px;
      height: 24px;
    }
    .tips {
      color: rgba(255,255,255,0.8);
      margin-top: 20px;
      font-size: 0.9em;
    }
    @media (max-width: 480px) {
      .container {
        padding: 0 15px;
        min-height: 60vh; // 新增
      }
      .github-corner svg {
        width: 60px;
        height: 60px;
      }
      .github-corner:hover .octo-arm {
        animation: none;
      }
      .github-corner .octo-arm {
        animation: octocat-wave 560ms ease-in-out;
      }
      .search-container {
        height: 45px;
      }

      #search-input {
        padding: 0 15px;
      }

      #search-button {
        padding: 0 20px;
      }
    }
    </style>
  </head>
  <body>
    <a href="${githubUrl}" target="_blank" class="github-corner" aria-label="View source on Github">
      <svg viewBox="0 0 250 250" aria-hidden="true">
        <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
        <path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
        <path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path>
      </svg>
    </a>
    <div class="container">
      <div class="logo">${logoSVG(120)}</div>
			<h1 class="title">${title}</h1>
			<p class="subtitle">${subtitle}</p>
			<div class="search-container">
				<input type="text" id="search-input" placeholder="${inputPlaceholder}">
				<button id="search-button" title="搜索">
					<svg focusable="false" aria-hidden="true" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
						<path d="M21 21L16.65 16.65M19 11C19 15.4183 15.4183 19 11 19C6.58172 19 3 15.4183 3 11C3 6.58172 6.58172 3 11 3C15.4183 3 19 6.58172 19 11Z" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></path>
					</svg>
				</button>
			</div>
			<p class="tips">提示：${tips}</p>
		</div>
    <script>
			function performSearch() {
				const query = document.getElementById('search-input').value;
				if (query) {
					window.location.href = '/search?q=' + encodeURIComponent(query);
				}
			}

			document.getElementById('search-button').addEventListener('click', performSearch);
			document.getElementById('search-input').addEventListener('keypress', function(event) {
				if (event.key === 'Enter') {
					performSearch();
				}
			});
    </script>
		${footerJS}
  </body>
  </html>
  `;
  return html;
}

export default {
  async fetch(request, env) {
		const getReqHeader = (key) => request.headers.get(key);

		let url = new URL(request.url);
		const homePage = url.origin;

		const pathnameFirst = url.pathname;
		const pathnameArray = pathnameFirst.split('/');
		// console.log('p', pathnameArray);

		let targetUrl = '';
		switch (pathnameArray[1]) {
			case '':
				// 首页
				return new Response(await searchInterface(), {
					headers: {
						'Content-Type': 'text/html; charset=UTF-8',
					},
				});

			case 'favicon.ico':
				// 图标
				// return new Response(null, { status: 204 });
				return new Response(logoSVG(32), {
						headers: {
								'Content-Type': 'image/svg+xml',
								'Cache-Control': 'public, max-age=86400' // 缓存 1 天
						}
				});

			case 'https:':
			case 'http:':
					// 确保 pathnameFirst 的开头 `/` 被移除
					targetUrl = pathnameFirst.startsWith('/') ? pathnameFirst.slice(1) : pathnameFirst;
					targetUrl = targetUrl + url.search;
					break;

			case 'search':
				// 搜索
				targetUrl = url.searchParams.get('q') ?? '';
				break;

			default:
				let shortHost = routeByHosts(pathnameArray[1]);
				// console.log(shortHost, pathnameFirst)

				targetUrl = 'https://' + (shortHost[1]
					? pathnameFirst.replace(new RegExp(`^/${pathnameArray[1]}/`), `${shortHost[0]}/`)
					: pathnameFirst.replace(/^\/+/, '')
				); // 移除所有开头的 `/`
				break;
		}

		// console.log('target url: ', targetUrl);

		// 不合法的 URL, 跳转到首页
		if (! isStrictValidUrl(targetUrl)) {
			return Response.redirect(homePage, 302);
		}

		// const workers_url = url.origin;
		// console.log('workers_url: ', workers_url);

		// targetUrl = targetUrl + url.search;
		url = new URL(targetUrl);

		const userAgentHeader = request.headers.get('User-Agent');
		const userAgent = userAgentHeader ? userAgentHeader.toLowerCase() : "null";
		if (env.UA) {
			AntiReptilianUA = AntiReptilianUA.concat(await ADD(env.UA));
		}

		// 反爬虫
		if (AntiReptilianUA.some(fxxk => userAgent.includes(fxxk)) && AntiReptilianUA.length > 0) {
			// 首页改成一个nginx伪装页
			return new Response(await nginx(), {
				headers: {
					'Content-Type': 'text/html; charset=UTF-8',
				},
			});
		}

		if (userAgent && userAgent.includes('mozilla')) {
			if (url.pathname === '/') {
				if (env.URL302) {
					return Response.redirect(env.URL302, 302);
				} else if (env.URL) {
					if (env.URL.toLowerCase() === 'nginx') {
						// 首页改成一个nginx伪装页
						return new Response(await nginx(), {
							headers: {
								'Content-Type': 'text/html; charset=UTF-8',
							},
						});
					} else {
						return fetch(new Request(env.URL, request));
					}
				}
			}
		}

		// 修改包含 %2F 和 %3A 的请求
		if (!/%2F/.test(url.search) && /%3A/.test(url.toString())) {
			let modifiedUrl = url.toString().replace(/%3A(?=.*?&)/, '%3Alibrary%2F');
			url = new URL(modifiedUrl);
			// console.log(`handle_url: ${url}`);
		}
		// console.log(url.toString());

		return httpHandler(request, url.toString(), env);
  },
};

/**
 * 处理HTTP请求
 * @param req 请求对象
 * @param reqURL 请求路径
 * @param env 环境变量
 */
async function httpHandler(req, reqURL, env) {
	// console.log(1, reqURL, reqURL);
  const reqHdrRaw = req.headers;

  // 处理预检请求
  if (req.method === 'OPTIONS' && reqHdrRaw.has('access-control-request-headers')) {
    return new Response(null, PREFLIGHT_INIT);
  }

  const rawLen = '';

  const reqHdrNew = new Headers(reqHdrRaw);
  reqHdrNew.delete("Authorization"); // 修复s3错误

  // const refer = reqHdrNew.get('referer');

  const urlObj = newUrl(reqURL);
	// console.log(urlObj)
  if (!urlObj) return new Response("Bad URL", { status: 400 });

  if (urlObj.hostname === 'api.github.com' && env && env.GITHUB_TOKEN) {
    reqHdrNew.set('Authorization', `Bearer ${env.GITHUB_TOKEN}`);
    if (!reqHdrNew.has('User-Agent')) {
      reqHdrNew.set('User-Agent', 'Cloudflare-Worker');
    }
  }

  const reqInit = {
    method: req.method,
    headers: reqHdrNew,
    redirect: 'follow',
    body: req.body,
  };
  return await proxy(urlObj, reqInit, rawLen);
}

/**
 * 代理请求
 * @param urlObj URL对象
 * @param reqInit 请求初始化对象
 * @param rawLen 原始长度
 */
async function proxy(urlObj, reqInit, rawLen) {
  const res = await fetch(urlObj.href, reqInit);
  const resHdrOld = res.headers;
  const resHdrNew = new Headers(resHdrOld);

	// console.log(2, resHdrNew)
  // 处理重定向
	if (resHdrNew.has("location")) {
		const location = resHdrNew.get("location");
		if (location === null) {
			return new Response("Location header is null", { status: 500 });
		}
		reqInit.redirect = "follow";
		return proxy(new URL(location), reqInit, resHdrOld.get('content-length'));
	}

  // // 验证长度
  // if (rawLen) {
  //   const newLen = resHdrOld.get('content-length') || '';
  //   const badLen = (rawLen !== newLen);

  //   if (badLen) {
  //     return makeRes(res.body, 400, {
  //       '--error': `bad len: ${newLen}, except: ${rawLen}`,
  //       'access-control-expose-headers': '--error',
  //     });
  //   }
  // }

  const status = res.status;
  resHdrNew.set('access-control-expose-headers', '*');
  resHdrNew.set('access-control-allow-origin', '*');
  resHdrNew.set('Cache-Control', 'max-age=1500');

  // 删除不必要的头
  resHdrNew.delete('content-security-policy');
  resHdrNew.delete('content-security-policy-report-only');
  resHdrNew.delete('clear-site-data');

  return new Response(res.body, {
    status,
    headers: resHdrNew,
  });
}

async function ADD(envadd) {
  let addtext = envadd.replace(/[  |"'\r\n]+/g, ',').replace(/,+/g, ',');
  if (addtext.charAt(0) === ',') addtext = addtext.slice(1);
  if (addtext.charAt(addtext.length - 1) === ',') addtext = addtext.slice(0, addtext.length - 1);
  const add = addtext.split(',');
  return add;
}