/tags/%E6%8A%80%E6%9C%AFRecent content in 技术 onHugoenFri, 15 May 2026 11:00:00 +0800/posts/1.htmlFri, 15 May 2026 11:00:00 +0800/posts/1.html<h2 id="什么是-cloudflare-5-秒盾">什么是 Cloudflare 5 秒盾</h2> <p>Cloudflare 的 &ldquo;5 秒盾&rdquo;（也称为 Browser Check 或 JS Challenge）是一种反爬虫机制。当用户访问受保护的页面时，会被拦截到一个中间页面，要求等待约 5 秒并通过 JavaScript 验证，验证通过后才能访问实际内容。</p> <h2 id="绕过方法">绕过方法</h2> <h3 id="方法一使用-curl_cffi">方法一：使用 curl_cffi</h3> <p><code>curl_cffi</code> 是一个 Python 库，可以模拟真实浏览器的 TLS 指纹和 HTTP/2 行为，从而绕过 Cloudflare 的 JS 挑战。</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="ln"> 1</span><span class="cl"><span class="kn">from</span> <span class="nn">curl_cffi</span> <span class="kn">import</span> <span class="n">requests</span> </span></span><span class="line"><span class="ln"> 2</span><span class="cl"> </span></span><span class="line"><span class="ln"> 3</span><span class="cl"><span class="c1"># 模拟 Chrome 浏览器指纹</span> </span></span><span class="line"><span class="ln"> 4</span><span class="cl"><span class="n">response</span> <span class="o">=</span> <span class="n">requests</span><span class="o">.</span><span class="n">get</span><span class="p">(</span> </span></span><span class="line"><span class="ln"> 5</span><span class="cl"> <span class="s2">&#34;https://example.com&#34;</span><span class="p">,</span> </span></span><span class="line"><span class="ln"> 6</span><span class="cl"> <span class="n">impersonate</span><span class="o">=</span><span class="s2">&#34;chrome110&#34;</span> </span></span><span class="line"><span class="ln"> 7</span><span class="cl"><span class="p">)</span> </span></span><span class="line"><span class="ln"> 8</span><span class="cl"> </span></span><span class="line"><span class="ln"> 9</span><span class="cl"><span class="nb">print</span><span class="p">(</span><span class="n">response</span><span class="o">.</span><span class="n">status_code</span><span class="p">)</span> </span></span><span class="line"><span class="ln">10</span><span class="cl"><span class="nb">print</span><span class="p">(</span><span class="n">response</span><span class="o">.</span><span class="n">text</span><span class="p">)</span> </span></span></code></pre></div><p>安装：</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="ln">1</span><span class="cl">pip install curl_cffi </span></span></code></pre></div><h3 id="方法二使用-undetected-chromedriver">方法二：使用 undetected-chromedriver</h3> <p><code>undetected-chromedriver</code> 是 Selenium 的增强版，可以绕过 Cloudflare 的自动化检测。</p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python"><span class="line"><span class="ln"> 1</span><span class="cl"><span class="kn">import</span> <span class="nn">undetected_chromedriver</span> <span class="k">as</span> <span class="nn">uc</span> </span></span><span class="line"><span class="ln"> 2</span><span class="cl"> </span></span><span class="line"><span class="ln"> 3</span><span class="cl"><span class="n">driver</span> <span class="o">=</span> <span class="n">uc</span><span class="o">.</span><span class="n">Chrome</span><span class="p">()</span> </span></span><span class="line"><span class="ln"> 4</span><span class="cl"><span class="n">driver</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s2">&#34;https://example.com&#34;</span><span class="p">)</span> </span></span><span class="line"><span class="ln"> 5</span><span class="cl"> </span></span><span class="line"><span class="ln"> 6</span><span class="cl"><span class="c1"># 等待页面加载</span> </span></span><span class="line"><span class="ln"> 7</span><span class="cl"><span class="kn">import</span> <span class="nn">time</span> </span></span><span class="line"><span class="ln"> 8</span><span class="cl"><span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="mi">6</span><span class="p">)</span> </span></span><span class="line"><span class="ln"> 9</span><span class="cl"> </span></span><span class="line"><span class="ln">10</span><span class="cl"><span class="nb">print</span><span class="p">(</span><span class="n">driver</span><span class="o">.</span><span class="n">page_source</span><span class="p">)</span> </span></span><span class="line"><span class="ln">11</span><span class="cl"><span class="n">driver</span><span class="o">.</span><span class="n">quit</span><span class="p">()</span> </span></span></code></pre></div><p>安装：</p>