外链跳转

src/layouts/BaseLayout.astro

@@ -143,6 +143,7 @@ const currentYear = new Date().getFullYear();
     <script is:inline src="https://cdn.jsdmirror.com/npm/@fancyapps/ui@5.0/dist/fancybox/fancybox.umd.js"></script>
     <script is:inline src="/js/random.js"></script>
     <script is:inline src="/js/search/typesense-search.js"></script>
+    <script is:inline src="/js/external-links.js"></script>
     <script is:inline>
       (() => {
         const storageKey = 'site-theme';

src/lib/external-link-whitelist.ts

@@ -0,0 +1,11 @@
+export const externalLinkWhitelist = [
+  'blog.biss.click',
+  'biss.click',
+  'github.com',
+  'astro.build',
+  'edgeone.ai',
+  'localhost',
+  '127.0.0.1',
+];
+
+export const externalLinkWaitSeconds = 10;

src/pages/go.astro

@@ -0,0 +1,130 @@
+---
+import BaseLayout from '@/layouts/BaseLayout.astro';
+import { externalLinkWaitSeconds, externalLinkWhitelist } from '@/lib/external-link-whitelist';
+
+const whitelist = externalLinkWhitelist.map((domain) => domain.toLowerCase());
+---
+
+<BaseLayout title="外链跳转" description="即将离开本站，请确认访问的外部链接。">
+  <section class="external-redirect" data-external-redirect>
+    <div class="external-redirect-panel">
+      <p class="external-redirect-eyebrow" data-status-label>外部链接</p>
+      <h1 data-title>正在检查目标链接</h1>
+      <p class="external-redirect-copy" data-message>请稍候，正在读取跳转地址。</p>
+
+      <div class="external-redirect-target" data-target-wrap hidden>
+        <span>目标地址</span>
+        <code data-target-url></code>
+      </div>
+
+      <div class="external-redirect-countdown" data-countdown-wrap hidden>
+        <svg viewBox="0 0 120 120" aria-hidden="true">
+          <circle cx="60" cy="60" r="52"></circle>
+          <circle cx="60" cy="60" r="52" data-countdown-ring></circle>
+        </svg>
+        <strong data-countdown>{externalLinkWaitSeconds}</strong>
+      </div>
+
+      <div class="external-redirect-actions">
+        <a class="external-redirect-button is-primary" href="/" data-continue hidden>立即访问</a>
+        <a class="external-redirect-button" href="/">返回首页</a>
+      </div>
+    </div>
+  </section>
+
+  <script
+    is:inline
+    define:vars={{
+      waitSeconds: externalLinkWaitSeconds,
+      whitelist,
+    }}
+  >
+    (() => {
+      const params = new URLSearchParams(window.location.search);
+      const rawUrl = params.get('url') || params.get('target') || params.get('to') || '';
+      const title = document.querySelector('[data-title]');
+      const message = document.querySelector('[data-message]');
+      const statusLabel = document.querySelector('[data-status-label]');
+      const targetWrap = document.querySelector('[data-target-wrap]');
+      const targetUrl = document.querySelector('[data-target-url]');
+      const countdownWrap = document.querySelector('[data-countdown-wrap]');
+      const countdown = document.querySelector('[data-countdown]');
+      const ring = document.querySelector('[data-countdown-ring]');
+      const continueLink = document.querySelector('[data-continue]');
+      const circumference = 2 * Math.PI * 52;
+
+      function setText(node, text) {
+        if (node) node.textContent = text;
+      }
+
+      function isWhitelisted(hostname) {
+        const host = hostname.toLowerCase();
+        return whitelist.some((domain) => {
+          const normalized = String(domain).replace(/^\*\./, '').toLowerCase();
+          return host === normalized || host.endsWith(`.${normalized}`);
+        });
+      }
+
+      function showError(text) {
+        setText(statusLabel, '无法跳转');
+        setText(title, '链接无效');
+        setText(message, text);
+      }
+
+      let destination;
+      try {
+        destination = new URL(rawUrl);
+      } catch {
+        showError('没有找到有效的目标地址，请返回上一页重新打开链接。');
+        return;
+      }
+
+      if (!['http:', 'https:'].includes(destination.protocol)) {
+        showError('仅支持跳转到 HTTP 或 HTTPS 链接。');
+        return;
+      }
+
+      targetWrap.hidden = false;
+      continueLink.hidden = false;
+      continueLink.href = destination.href;
+      targetUrl.textContent = destination.href;
+
+      if (isWhitelisted(destination.hostname)) {
+        setText(statusLabel, '白名单链接');
+        setText(title, '即将前往可信站点');
+        setText(message, '该域名已在白名单中，将立即为你打开。');
+        window.setTimeout(() => {
+          window.location.replace(destination.href);
+        }, 300);
+        return;
+      }
+
+      let remaining = Number(waitSeconds);
+      setText(statusLabel, '请确认');
+      setText(title, '即将离开本站');
+      setText(message, `目标域名不在白名单中，${remaining} 秒后将自动跳转。`);
+      countdownWrap.hidden = false;
+      countdown.textContent = remaining;
+
+      if (ring) {
+        ring.style.strokeDasharray = `${circumference}`;
+        ring.style.strokeDashoffset = '0';
+      }
+
+      const timer = window.setInterval(() => {
+        remaining -= 1;
+        countdown.textContent = remaining;
+        setText(message, `目标域名不在白名单中，${remaining} 秒后将自动跳转。`);
+
+        if (ring) {
+          ring.style.strokeDashoffset = String(circumference * (1 - remaining / waitSeconds));
+        }
+
+        if (remaining <= 0) {
+          window.clearInterval(timer);
+          window.location.replace(destination.href);
+        }
+      }, 1000);
+    })();
+  </script>
+</BaseLayout>

src/styles/site.css

@@ -2243,6 +2243,165 @@ meting-js {
   border-color: rgba(174, 205, 197, 0.2);
 }
 
+.external-redirect {
+  width: min(760px, calc(100% - (var(--page-gutter) * 2)));
+  min-height: calc(100vh - 240px);
+  margin: 42px auto 80px;
+  display: grid;
+  place-items: center;
+}
+
+.external-redirect-panel {
+  width: 100%;
+  overflow: hidden;
+  border: 1px solid rgba(255, 255, 255, 0.58);
+  border-radius: 8px;
+  padding: clamp(26px, 6vw, 48px);
+  background:
+    radial-gradient(circle at 15% 0%, rgba(255, 255, 255, 0.74), transparent 36%),
+    linear-gradient(145deg, rgba(255, 255, 255, 0.7), rgba(226, 248, 241, 0.42)),
+    rgba(255, 253, 248, 0.78);
+  box-shadow:
+    inset 0 1px 0 rgba(255, 255, 255, 0.82),
+    0 24px 64px rgba(44, 55, 63, 0.16);
+  backdrop-filter: blur(18px) saturate(165%);
+  -webkit-backdrop-filter: blur(18px) saturate(165%);
+}
+
+.external-redirect-eyebrow {
+  margin: 0 0 10px;
+  color: var(--accent);
+  font-size: 0.88rem;
+  font-weight: 800;
+}
+
+.external-redirect h1 {
+  margin: 0;
+  color: #20242a;
+  font-size: clamp(2rem, 6vw, 3.8rem);
+  line-height: 1.08;
+}
+
+.external-redirect-copy {
+  max-width: 620px;
+  margin: 16px 0 0;
+  color: var(--muted);
+  font-size: 1rem;
+}
+
+.external-redirect-target {
+  display: grid;
+  gap: 8px;
+  margin-top: 24px;
+  border: 1px solid rgba(15, 118, 110, 0.16);
+  border-radius: 8px;
+  padding: 14px 16px;
+  background: rgba(236, 253, 245, 0.64);
+}
+
+.external-redirect-target span {
+  color: var(--accent);
+  font-size: 0.84rem;
+  font-weight: 800;
+}
+
+.external-redirect-target code {
+  overflow-wrap: anywhere;
+  color: #33433f;
+  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
+  font-size: 0.92rem;
+}
+
+.external-redirect-countdown {
+  position: relative;
+  width: 112px;
+  height: 112px;
+  margin-top: 26px;
+}
+
+.external-redirect-countdown svg {
+  width: 112px;
+  height: 112px;
+  transform: rotate(-90deg);
+}
+
+.external-redirect-countdown circle {
+  fill: none;
+  stroke: rgba(15, 118, 110, 0.14);
+  stroke-width: 10;
+}
+
+.external-redirect-countdown circle:last-child {
+  stroke: #3eb8be;
+  stroke-linecap: round;
+  transition: stroke-dashoffset 0.9s linear;
+}
+
+.external-redirect-countdown strong {
+  position: absolute;
+  inset: 0;
+  display: grid;
+  place-items: center;
+  color: #2f4358;
+  font-size: 2rem;
+  line-height: 1;
+}
+
+.external-redirect-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+  margin-top: 28px;
+}
+
+.external-redirect-button {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 44px;
+  border: 1px solid rgba(15, 118, 110, 0.2);
+  border-radius: 8px;
+  padding: 9px 16px;
+  color: var(--accent);
+  font-weight: 800;
+  background: rgba(236, 253, 245, 0.68);
+  transition:
+    color 0.2s ease,
+    background-color 0.2s ease,
+    transform 0.2s ease;
+}
+
+.external-redirect-button:hover,
+.external-redirect-button.is-primary {
+  color: #fff;
+  background: #3eb8be;
+  transform: translateY(-1px);
+}
+
+:root[data-theme='dark'] .external-redirect-panel {
+  border-color: rgba(174, 205, 197, 0.18);
+  background:
+    radial-gradient(circle at 14% 0%, rgba(114, 222, 210, 0.1), transparent 34%),
+    linear-gradient(145deg, rgba(28, 43, 47, 0.82), rgba(12, 22, 25, 0.72)),
+    rgba(17, 28, 31, 0.74);
+  box-shadow: var(--shadow);
+}
+
+:root[data-theme='dark'] .external-redirect h1,
+:root[data-theme='dark'] .external-redirect-countdown strong {
+  color: #edf7f5;
+}
+
+:root[data-theme='dark'] .external-redirect-target,
+:root[data-theme='dark'] .external-redirect-button {
+  border-color: rgba(114, 222, 210, 0.22);
+  background: rgba(114, 222, 210, 0.1);
+}
+
+:root[data-theme='dark'] .external-redirect-target code {
+  color: #dce9e6;
+}
+
 .site-footer {
   position: relative;
   margin-top: 64px;

static/js/external-links.js

@@ -0,0 +1,45 @@
+(() => {
+  const redirectPath = '/go/';
+  const urlParams = new URLSearchParams(window.location.search);
+
+  if (window.location.pathname === redirectPath || window.location.pathname === '/go') return;
+  if (urlParams.get('noExternalRedirect') === '1') return;
+
+  function getExternalUrl(anchor) {
+    const href = anchor.getAttribute('href');
+    if (!href || href.startsWith('#')) return null;
+
+    let targetUrl;
+    try {
+      targetUrl = new URL(href, window.location.href);
+    } catch {
+      return null;
+    }
+
+    if (!['http:', 'https:'].includes(targetUrl.protocol)) return null;
+    if (targetUrl.origin === window.location.origin) return null;
+
+    return targetUrl.href;
+  }
+
+  document.addEventListener('click', (event) => {
+    const anchor = event.target.closest?.('a[href]');
+    if (!anchor) return;
+    if (event.defaultPrevented || event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) return;
+
+    const externalUrl = getExternalUrl(anchor);
+    if (!externalUrl) return;
+
+    event.preventDefault();
+
+    const redirectUrl = `${redirectPath}?url=${encodeURIComponent(externalUrl)}`;
+    const target = anchor.getAttribute('target');
+
+    if (target && target !== '_self') {
+      window.open(redirectUrl, target, 'noopener,noreferrer');
+      return;
+    }
+
+    window.location.href = redirectUrl;
+  });
+})();