{"id":237,"date":"2026-08-30T10:24:04","date_gmt":"2026-08-30T02:24:04","guid":{"rendered":"https:\/\/yykcj.com\/?p=237"},"modified":"2026-08-30T10:24:04","modified_gmt":"2026-08-30T02:24:04","slug":"%e5%89%8d%e7%ab%af%e5%ae%89%e5%85%a8%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e%e5%8e%9f%e7%90%86%e5%88%b0%e9%98%b2%e5%be%a1%ef%bc%8c%e5%bd%bb%e5%ba%95%e5%91%8a%e5%88%ab-xss-%e4%b8%8e-csrf","status":"publish","type":"post","link":"https:\/\/yykcj.com\/?p=237","title":{"rendered":"\u524d\u7aef\u5b89\u5168\u5b9e\u6218\uff1a\u4ece\u539f\u7406\u5230\u9632\u5fa1\uff0c\u5f7b\u5e95\u544a\u522b XSS \u4e0e CSRF"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728\u5f53\u4eca\u7684 Web \u5f00\u53d1\u4e2d\uff0c\u524d\u7aef\u5b89\u5168\u5f80\u5f80\u662f\u88ab\u5ffd\u89c6\u7684\u4e00\u73af\u3002\u8bb8\u591a\u5f00\u53d1\u8005\u8ba4\u4e3a\u53ea\u8981\u540e\u7aef\u505a\u597d\u9632\u62a4\u5c31\u4e07\u4e8b\u5927\u5409\uff0c\u4f46\u5b9e\u9645\u4e0a\uff0cXSS\uff08\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff09\u548c CSRF\uff08\u8de8\u7ad9\u8bf7\u6c42\u4f2a\u9020\uff09\u662f\u4e24\u7c7b\u6700\u5e38\u89c1\u4e14\u5371\u5bb3\u5de8\u5927\u7684\u524d\u7aef\u5b89\u5168\u6f0f\u6d1e\u3002\u5b83\u4eec\u4e0d\u4ec5\u53ef\u80fd\u5bfc\u81f4\u7528\u6237\u6570\u636e\u6cc4\u9732\uff0c\u8fd8\u80fd\u8ba9\u653b\u51fb\u8005\u4ee5\u7528\u6237\u8eab\u4efd\u6267\u884c\u6076\u610f\u64cd\u4f5c\u3002\u672c\u6587\u5c06\u5e26\u4f60\u6df1\u5165\u7406\u89e3\u8fd9\u4e24\u79cd\u653b\u51fb\u7684\u539f\u7406\uff0c\u5e76\u901a\u8fc7\u5b9e\u6218\u4ee3\u7801\uff0c\u624b\u628a\u624b\u6559\u4f60\u6784\u5efa\u6709\u6548\u7684\u9632\u5fa1\u4f53\u7cfb\u3002<\/p>\n<h2>\u4e00\u3001XSS \u653b\u51fb\uff1a\u539f\u7406\u4e0e\u5206\u7c7b<\/h2>\n<p>XSS\uff08Cross-Site Scripting\uff0c\u8de8\u7ad9\u811a\u672c\u653b\u51fb\uff09\u662f\u6307\u653b\u51fb\u8005\u5c06\u6076\u610f\u811a\u672c\u6ce8\u5165\u5230\u7f51\u9875\u4e2d\uff0c\u5f53\u7528\u6237\u6d4f\u89c8\u8be5\u7f51\u9875\u65f6\uff0c\u6076\u610f\u811a\u672c\u5728\u7528\u6237\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\uff0c\u4ece\u800c\u7a83\u53d6\u7528\u6237\u4fe1\u606f\u6216\u6267\u884c\u6076\u610f\u64cd\u4f5c\u3002<\/p>\n<h3>1.1 \u653b\u51fb\u539f\u7406<\/h3>\n<p>XSS \u7684\u672c\u8d28\u662f<strong>\u672a\u7ecf\u8fc7\u6ee4\u7684\u7528\u6237\u8f93\u5165\u88ab\u5f53\u4f5c\u4ee3\u7801\u6267\u884c<\/strong>\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u7b80\u5355\u7684\u7559\u8a00\u677f\uff0c\u5982\u679c\u7528\u6237\u8f93\u5165 <code><script>alert('XSS')<\/script><\/code> \u800c\u7cfb\u7edf\u672a\u505a\u5904\u7406\uff0c\u90a3\u4e48\u5176\u4ed6\u7528\u6237\u8bbf\u95ee\u7559\u8a00\u677f\u65f6\uff0c\u8fd9\u6bb5\u811a\u672c\u5c31\u4f1a\u6267\u884c\u3002<\/p>\n<h3>1.2 \u5e38\u89c1\u7c7b\u578b<\/h3>\n<ul>\n<li><strong>\u53cd\u5c04\u578b XSS<\/strong>\uff1a\u6076\u610f\u811a\u672c\u901a\u8fc7 URL \u53c2\u6570\u4f20\u5165\uff0c\u5e76\u7acb\u5373\u5728\u54cd\u5e94\u4e2d\u8fd4\u56de\u6267\u884c\u3002\u4f8b\u5982\uff1a<code>http:\/\/example.com\/search?q=<script>...<\/code><\/li>\n<li><strong>\u5b58\u50a8\u578b XSS<\/strong>\uff1a\u6076\u610f\u811a\u672c\u88ab\u5b58\u50a8\u5728\u670d\u52a1\u5668\u7aef\uff08\u5982\u6570\u636e\u5e93\uff09\uff0c\u5f53\u5176\u4ed6\u7528\u6237\u8bbf\u95ee\u65f6\u88ab\u52a0\u8f7d\u6267\u884c\u3002\u5e38\u89c1\u4e8e\u8bc4\u8bba\u533a\u3001\u7528\u6237\u5934\u50cf\u7b49\u573a\u666f\u3002<\/li>\n<li><strong>DOM \u578b XSS<\/strong>\uff1a\u653b\u51fb\u901a\u8fc7\u4fee\u6539 DOM \u8282\u70b9\u6765\u89e6\u53d1\uff0c\u4e0d\u7ecf\u8fc7\u670d\u52a1\u5668\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 <code>innerHTML<\/code> \u5c06\u7528\u6237\u8f93\u5165\u63d2\u5165\u9875\u9762\u65f6\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001XSS \u9632\u5fa1\u5b9e\u6218<\/h2>\n<h3>2.1 \u8f93\u5165\u8fc7\u6ee4\u4e0e\u8f93\u51fa\u8f6c\u4e49<\/h3>\n<p><strong>\u8f93\u5165\u8fc7\u6ee4<\/strong>\u662f\u9632\u5fa1 XSS \u7684\u7b2c\u4e00\u9053\u9632\u7ebf\uff0c\u4f46\u8981\u6ce8\u610f\uff1a<strong>\u7edd\u4e0d\u80fd\u53ea\u4f9d\u8d56\u524d\u7aef\u8fc7\u6ee4<\/strong>\uff0c\u56e0\u4e3a\u653b\u51fb\u8005\u53ef\u4ee5\u7ed5\u8fc7\u524d\u7aef\u76f4\u63a5\u53d1\u9001\u8bf7\u6c42\u3002\u524d\u7aef\u8fc7\u6ee4\u4e3b\u8981\u7528\u4e8e\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u771f\u6b63\u7684\u5b89\u5168\u9632\u7ebf\u5728\u540e\u7aef\u3002<\/p>\n<p><strong>\u8f93\u51fa\u8f6c\u4e49<\/strong>\u662f\u6838\u5fc3\u9632\u5fa1\u624b\u6bb5\u3002\u5728\u5c06\u7528\u6237\u8f93\u5165\u63d2\u5165\u5230 HTML \u4e2d\u65f6\uff0c\u5fc5\u987b\u5bf9\u7279\u6b8a\u5b57\u7b26\u8fdb\u884c\u8f6c\u4e49\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u524d\u7aef\u5e38\u7528\u7684\u8f6c\u4e49\u51fd\u6570\uff1a<\/p>\n<pre><code class=\"language-javascript\">\n\/\/ utils\/escape.js\nfunction escapeHtml(str) {\n  if (typeof str !== &#x27;string&#x27;) {\n    return str;\n  }\n  const map = {\n    &#x27;&amp;&#x27;: &#x27;&amp;amp;&#x27;,\n    &#x27;&lt;&#x27;: &#x27;&amp;lt;&#x27;,\n    &#x27;&gt;&#x27;: &#x27;&amp;gt;&#x27;,\n    &#x27;&quot;&#x27;: &#x27;&amp;quot;&#x27;,\n    &quot;&#x27;&quot;: &#x27;&amp;#039;&#x27;\n  };\n  return str.replace(\/[&amp;&lt;&gt;&quot;&#x27;]\/g, (m) =&gt; map[m]);\n}\n\n\/\/ \u4f7f\u7528\u793a\u4f8b\nconst userInput = &#x27;&lt;script&gt;alert(&quot;XSS&quot;)&lt;\/script&gt;&#x27;;\ndocument.getElementById(&#x27;output&#x27;).textContent = escapeHtml(userInput); \/\/ \u5b89\u5168\u663e\u793a\n<\/code><\/pre>\n<p>\ud83d\udca1 <strong>\u6ce8\u610f<\/strong>\uff1a\u4f7f\u7528 <code>textContent<\/code> \u800c\u4e0d\u662f <code>innerHTML<\/code> \u53ef\u4ee5\u81ea\u52a8\u8f6c\u4e49\uff0c\u4f46\u5982\u679c\u4f60\u5fc5\u987b\u4f7f\u7528 <code>innerHTML<\/code>\uff08\u4f8b\u5982\u6e32\u67d3\u5bcc\u6587\u672c\uff09\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u4e0a\u8ff0\u8f6c\u4e49\u51fd\u6570\u3002<\/p>\n<h3>2.2 \u4f7f\u7528 CSP\uff08\u5185\u5bb9\u5b89\u5168\u7b56\u7565\uff09<\/h3>\n<p>CSP \u662f\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684\u4e00\u79cd\u5b89\u5168\u673a\u5236\uff0c\u901a\u8fc7 HTTP \u54cd\u5e94\u5934\u6765\u9650\u5236\u9875\u9762\u53ef\u4ee5\u52a0\u8f7d\u7684\u8d44\u6e90\uff0c\u4ece\u800c\u6709\u6548\u963b\u6b62 XSS \u653b\u51fb\u3002<\/p>\n<p>\u5728 Express \u4e2d\u8bbe\u7f6e CSP\uff1a<\/p>\n<pre><code class=\"language-javascript\">\n\/\/ server.js\nconst express = require(&#x27;express&#x27;);\nconst helmet = require(&#x27;helmet&#x27;);\nconst app = express();\n\n\/\/ \u4f7f\u7528 helmet \u7b80\u5316 CSP \u914d\u7f6e\napp.use(helmet.contentSecurityPolicy({\n  directives: {\n    defaultSrc: [&quot;&#x27;self&#x27;&quot;],\n    scriptSrc: [&quot;&#x27;self&#x27;&quot;, &quot;&#x27;nonce-random&#x27;&quot;] \/\/ \u5141\u8bb8\u5185\u8054\u811a\u672c\u4f46\u9700\u8981 nonce\n  }\n}));\n\n\/\/ \u6216\u8005\u624b\u52a8\u8bbe\u7f6e\napp.use((req, res, next) =&gt; {\n  res.setHeader(\n    &#x27;Content-Security-Policy&#x27;,\n    &quot;default-src &#x27;self&#x27;; script-src &#x27;self&#x27; &#x27;nonce-abc123&#x27;; style-src &#x27;self&#x27; &#x27;unsafe-inline&#x27;&quot;\n  );\n  next();\n});\n<\/code><\/pre>\n<p>\ud83d\udca1 <strong>\u6700\u4f73\u5b9e\u8df5<\/strong>\uff1aCSP \u5e94\u4f5c\u4e3a\u7eb5\u6df1\u9632\u5fa1\u7684\u4e00\u90e8\u5206\uff0c\u5373\u4f7f\u8f93\u51fa\u8f6c\u4e49\u88ab\u7ed5\u8fc7\uff0cCSP \u4e5f\u80fd\u963b\u6b62\u6076\u610f\u811a\u672c\u7684\u6267\u884c\u3002<\/p>\n<h3>2.3 \u8bbe\u7f6e HttpOnly Cookie<\/h3>\n<p>\u5c06\u654f\u611f Cookie\uff08\u5982 Session ID\uff09\u8bbe\u7f6e\u4e3a <code>HttpOnly<\/code>\uff0c\u53ef\u4ee5\u9632\u6b62 JavaScript \u901a\u8fc7 <code>document.cookie<\/code> \u8bfb\u53d6\uff0c\u4ece\u800c\u4fdd\u62a4 Cookie \u4e0d\u88ab XSS \u7a83\u53d6\u3002<\/p>\n<p>\u5728 Express \u4e2d\u8bbe\u7f6e\uff1a<\/p>\n<pre><code class=\"language-javascript\">\nres.cookie(&#x27;sessionId&#x27;, &#x27;random-value&#x27;, {\n  httpOnly: true, \/\/ \u7981\u6b62 JS \u8bbf\u95ee\n  secure: true,   \/\/ \u4ec5 HTTPS\n  sameSite: &#x27;lax&#x27; \/\/ \u63a7\u5236\u8de8\u7ad9\u8bf7\u6c42\n});\n<\/code><\/pre>\n<h3>2.4 \u524d\u7aef\u6846\u67b6\u7684\u5185\u7f6e\u9632\u62a4<\/h3>\n<p>\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\uff08\u5982 React\u3001Vue\uff09\u9ed8\u8ba4\u5bf9\u63d2\u503c\u8fdb\u884c\u4e86\u8f6c\u4e49\u3002\u4f8b\u5982 React \u7684 <code>{userInput}<\/code> \u4f1a\u81ea\u52a8\u8f6c\u4e49\uff0c\u4f46\u4f7f\u7528 <code>dangerouslySetInnerHTML<\/code> \u65f6\u9700\u683c\u5916\u5c0f\u5fc3\u3002<\/p>\n<pre><code class=\"language-jsx\">\n\/\/ React \u4e2d\u5b89\u5168\u4f7f\u7528 HTML\n&lt;div dangerouslySetInnerHTML={{ __html: sanitizeHtml(userInput) }} \/&gt;\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u63a8\u8350\u4f7f\u7528 DOMPurify \u5e93\u8fdb\u884c HTML \u51c0\u5316\uff1a<\/p>\n<pre><code class=\"language-bash\">\nnpm install dompurify\n<\/code><\/pre>\n<pre><code class=\"language-javascript\">\nimport DOMPurify from &#x27;dompurify&#x27;;\nconst clean = DOMPurify.sanitize(userInput);\ndocument.getElementById(&#x27;content&#x27;).innerHTML = clean;\n<\/code><\/pre>\n<h2>\u4e09\u3001CSRF \u653b\u51fb\uff1a\u539f\u7406\u4e0e\u9632\u5fa1<\/h2>\n<h3>3.1 \u653b\u51fb\u539f\u7406<\/h3>\n<p>CSRF\uff08Cross-Site Request Forgery\uff0c\u8de8\u7ad9\u8bf7\u6c42\u4f2a\u9020\uff09\u662f\u6307\u653b\u51fb\u8005\u8bf1\u5bfc\u7528\u6237\u5728\u5df2\u767b\u5f55\u7684\u7f51\u7ad9\u4e0a\u6267\u884c\u975e\u672c\u610f\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u7528\u6237\u767b\u5f55\u4e86\u94f6\u884c\u7f51\u7ad9\uff0c\u653b\u51fb\u8005\u5728\u53e6\u4e00\u4e2a\u7f51\u7ad9\u4e0a\u653e\u7f6e\u4e00\u4e2a\u56fe\u7247\uff0c\u56fe\u7247\u7684 <code>src<\/code> \u6307\u5411\u94f6\u884c\u7684\u8f6c\u8d26\u63a5\u53e3\uff0c\u7528\u6237\u8bbf\u95ee\u8be5\u9875\u9762\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u5e26\u7740\u7528\u6237\u7684 Cookie \u53d1\u8d77\u8bf7\u6c42\uff0c\u4ece\u800c\u5b9e\u73b0\u8f6c\u8d26\u3002<\/p>\n<h3>3.2 \u9632\u5fa1\u7b56\u7565<\/h3>\n<h4>\u4f7f\u7528 CSRF Token<\/h4>\n<p>CSRF Token \u662f\u9632\u5fa1 CSRF \u7684\u7ecf\u5178\u65b9\u6cd5\u3002\u670d\u52a1\u5668\u751f\u6210\u4e00\u4e2a\u968f\u673a Token\uff0c\u5e76\u5728\u8868\u5355\u6216\u8bf7\u6c42\u5934\u4e2d\u643a\u5e26\uff0c\u670d\u52a1\u5668\u9a8c\u8bc1 Token \u662f\u5426\u5339\u914d\u3002<\/p>\n<p><strong>\u5b9e\u73b0\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li>\u670d\u52a1\u5668\u751f\u6210 Token \u5e76\u5b58\u50a8\u5728 Session \u4e2d\u3002<\/li>\n<li>\u5728\u9875\u9762\u8868\u5355\u4e2d\u5d4c\u5165\u8be5 Token\u3002<\/li>\n<li>\u63d0\u4ea4\u8bf7\u6c42\u65f6\uff0cToken \u968f\u8bf7\u6c42\u4e00\u8d77\u53d1\u9001\u3002<\/li>\n<li>\u670d\u52a1\u5668\u9a8c\u8bc1 Token \u662f\u5426\u4e0e Session \u4e2d\u7684\u4e00\u81f4\u3002<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\uff08Express + \u524d\u7aef\uff09<\/strong><\/p>\n<pre><code class=\"language-javascript\">\n\/\/ server.js\nconst express = require(&#x27;express&#x27;);\nconst session = require(&#x27;express-session&#x27;);\nconst crypto = require(&#x27;crypto&#x27;);\nconst app = express();\n\napp.use(session({ secret: &#x27;your-secret&#x27;, resave: false, saveUninitialized: true }));\n\n\/\/ \u751f\u6210 CSRF Token\napp.get(&#x27;\/form&#x27;, (req, res) =&gt; {\n  if (!req.session.csrfToken) {\n    req.session.csrfToken = crypto.randomBytes(16).toString(&#x27;hex&#x27;);\n  }\n  res.send(`\n    &lt;form action=&quot;\/submit&quot; method=&quot;POST&quot;&gt;\n      &lt;input type=&quot;hidden&quot; name=&quot;_csrf&quot; value=&quot;${req.session.csrfToken}&quot; \/&gt;\n      &lt;input type=&quot;text&quot; name=&quot;data&quot; \/&gt;\n      &lt;button type=&quot;submit&quot;&gt;\u63d0\u4ea4&lt;\/button&gt;\n    &lt;\/form&gt;\n  `);\n});\n\n\/\/ \u9a8c\u8bc1 Token\napp.post(&#x27;\/submit&#x27;, (req, res) =&gt; {\n  if (req.body._csrf !== req.session.csrfToken) {\n    return res.status(403).send(&#x27;CSRF token invalid&#x27;);\n  }\n  \/\/ \u5904\u7406\u8bf7\u6c42\n  res.send(&#x27;Success&#x27;);\n});\n<\/code><\/pre>\n<p>\u524d\u7aef\u4f7f\u7528 Axios \u65f6\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u5168\u5c40\u8bf7\u6c42\u5934\uff1a<\/p>\n<pre><code class=\"language-javascript\">\n\/\/ \u524d\u7aef main.js\naxios.defaults.headers.common[&#x27;X-CSRF-Token&#x27;] = getCsrfTokenFromMeta();\n<\/code><\/pre>\n<h4>SameSite Cookie \u5c5e\u6027<\/h4>\n<p><code>SameSite<\/code> \u5c5e\u6027\u53ef\u4ee5\u9650\u5236 Cookie \u5728\u8de8\u7ad9\u8bf7\u6c42\u4e2d\u662f\u5426\u53d1\u9001\u3002\u8bbe\u7f6e\u4e3a <code>Strict<\/code> \u6216 <code>Lax<\/code> \u53ef\u4ee5\u963b\u6b62\u5927\u90e8\u5206 CSRF \u653b\u51fb\u3002<\/p>\n<pre><code class=\"language-javascript\">\nres.cookie(&#x27;sessionId&#x27;, &#x27;value&#x27;, {\n  sameSite: &#x27;strict&#x27; \/\/ \u6216 &#x27;lax&#x27;\n});\n<\/code><\/pre>\n<p>\ud83d\udca1 <strong>\u6ce8\u610f<\/strong>\uff1a<code>SameSite<\/code> \u5e76\u4e0d\u662f\u4e07\u80fd\u7684\uff0c\u5b83\u53ef\u80fd\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\uff08\u5982 OAuth \u6d41\u7a0b\uff09\uff0c\u5efa\u8bae\u7ed3\u5408 CSRF Token \u4f7f\u7528\u3002<\/p>\n<h2>\u56db\u3001\u5b8c\u6574\u5b9e\u6218\uff1a\u6784\u5efa\u4e00\u4e2a\u5b89\u5168\u7684\u7559\u8a00\u677f<\/h2>\n<p>\u4e0b\u9762\u6211\u4eec\u7efc\u5408\u8fd0\u7528\u4ee5\u4e0a\u77e5\u8bc6\uff0c\u6784\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u7559\u8a00\u677f\uff0c\u6f14\u793a\u5982\u4f55\u9632\u5fa1 XSS \u548c CSRF\u3002<\/p>\n<h3>4.1 \u540e\u7aef\uff08Node.js + Express\uff09<\/h3>\n<pre><code class=\"language-javascript\">\n\/\/ server.js\nconst express = require(&#x27;express&#x27;);\nconst session = require(&#x27;express-session&#x27;);\nconst crypto = require(&#x27;crypto&#x27;);\nconst bodyParser = require(&#x27;body-parser&#x27;);\nconst helmet = require(&#x27;helmet&#x27;);\nconst app = express();\n\n\/\/ \u5e94\u7528\u4e2d\u95f4\u4ef6\napp.use(helmet()); \/\/ \u5305\u542b CSP\napp.use(bodyParser.urlencoded({ extended: false }));\napp.use(session({ secret: &#x27;my-secret&#x27;, resave: false, saveUninitialized: true }));\n\n\/\/ \u6a21\u62df\u6570\u636e\u5e93\nlet messages = [];\n\n\/\/ \u751f\u6210 CSRF Token\napp.get(&#x27;\/api\/csrf-token&#x27;, (req, res) =&gt; {\n  if (!req.session.csrfToken) {\n    req.session.csrfToken = crypto.randomBytes(16).toString(&#x27;hex&#x27;);\n  }\n  res.json({ csrfToken: req.session.csrfToken });\n});\n\n\/\/ \u83b7\u53d6\u7559\u8a00\napp.get(&#x27;\/api\/messages&#x27;, (req, res) =&gt; {\n  res.json(messages);\n});\n\n\/\/ \u63d0\u4ea4\u7559\u8a00\uff08\u9700\u9a8c\u8bc1 CSRF\uff09\napp.post(&#x27;\/api\/messages&#x27;, (req, res) =&gt; {\n  \/\/ \u9a8c\u8bc1 CSRF Token\n  if (req.body._csrf !== req.session.csrfToken) {\n    return res.status(403).json({ error: &#x27;CSRF token invalid&#x27; });\n  }\n\n  const content = req.body.content;\n  \/\/ \u7b80\u5355\u7684\u8f93\u5165\u8fc7\u6ee4\uff08\u540e\u7aef\u5fc5\u987b\u505a\uff09\n  const sanitized = content.replace(\/&lt;script&gt;\/gi, &#x27;&#x27;).replace(\/&lt;\\\/script&gt;\/gi, &#x27;&#x27;);\n  messages.push({ id: Date.now(), content: sanitized });\n  res.json({ success: true });\n});\n\napp.listen(3000, () =&gt; console.log(&#x27;Server running on http:\/\/localhost:3000&#x27;));\n<\/code><\/pre>\n<h3>4.2 \u524d\u7aef\uff08\u539f\u751f JavaScript\uff09<\/h3>\n<pre><code class=\"language-html\">\n&lt;!-- index.html --&gt;\n&lt;!DOCTYPE html&gt;\n&lt;html lang=&quot;zh-CN&quot;&gt;\n&lt;head&gt;\n  &lt;meta charset=&quot;UTF-8&quot;&gt;\n  &lt;title&gt;\u5b89\u5168\u7559\u8a00\u677f&lt;\/title&gt;\n  &lt;meta name=&quot;csrf-token&quot; id=&quot;csrf-token&quot; content=&quot;&quot;&gt;\n&lt;\/head&gt;\n&lt;body&gt;\n  &lt;h1&gt;\u5b89\u5168\u7559\u8a00\u677f&lt;\/h1&gt;\n  &lt;form id=&quot;message-form&quot;&gt;\n    &lt;input type=&quot;text&quot; id=&quot;content&quot; placeholder=&quot;\u5199\u4e0b\u4f60\u7684\u7559\u8a00&quot; required \/&gt;\n    &lt;button type=&quot;submit&quot;&gt;\u63d0\u4ea4&lt;\/button&gt;\n  &lt;\/form&gt;\n  &lt;ul id=&quot;messages&quot;&gt;&lt;\/ul&gt;\n\n  &lt;script&gt;\n    \/\/ \u83b7\u53d6 CSRF Token\n    fetch(&#x27;\/api\/csrf-token&#x27;)\n      .then(res =&gt; res.json())\n      .then(data =&gt; {\n        document.getElementById(&#x27;csrf-token&#x27;).setAttribute(&#x27;content&#x27;, data.csrfToken);\n      });\n\n    \/\/ \u52a0\u8f7d\u7559\u8a00\n    function loadMessages() {\n      fetch(&#x27;\/api\/messages&#x27;)\n        .then(res =&gt; res.json())\n        .then(data =&gt; {\n          const ul = document.getElementById(&#x27;messages&#x27;);\n          ul.innerHTML = &#x27;&#x27;;\n          data.forEach(msg =&gt; {\n            const li = document.createElement(&#x27;li&#x27;);\n            \/\/ \u4f7f\u7528 textContent \u9632\u6b62 XSS\n            li.textContent = msg.content;\n            ul.appendChild(li);\n          });\n        });\n    }\n\n    loadMessages();\n\n    \/\/ \u63d0\u4ea4\u7559\u8a00\n    document.getElementById(&#x27;message-form&#x27;).addEventListener(&#x27;submit&#x27;, (e) =&gt; {\n      e.preventDefault();\n      const content = document.getElementById(&#x27;content&#x27;).value;\n      const csrfToken = document.getElementById(&#x27;csrf-token&#x27;).getAttribute(&#x27;content&#x27;);\n      fetch(&#x27;\/api\/messages&#x27;, {\n        method: &#x27;POST&#x27;,\n        headers: {\n          &#x27;Content-Type&#x27;: &#x27;application\/x-www-form-urlencoded&#x27;,\n        },\n        body: `content=${encodeURIComponent(content)}&amp;_csrf=${csrfToken}`\n      })\n      .then(res =&gt; res.json())\n      .then(data =&gt; {\n        if (data.success) {\n          loadMessages();\n          document.getElementById(&#x27;content&#x27;).value = &#x27;&#x27;;\n        } else {\n          alert(data.error);\n        }\n      });\n    });\n  &lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;\n<\/code><\/pre>\n<h2>\u4e94\u3001\u603b\u7ed3\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u901a\u8fc7\u672c\u6587\u7684\u5b9e\u6218\uff0c\u6211\u4eec\u638c\u63e1\u4e86\u4ee5\u4e0b\u5173\u952e\u70b9\uff1a<\/p>\n<ul>\n<li><strong>XSS \u9632\u5fa1<\/strong>\uff1a\u8f93\u5165\u8fc7\u6ee4\u3001\u8f93\u51fa\u8f6c\u4e49\u3001\u4f7f\u7528 CSP\u3001\u8bbe\u7f6e HttpOnly Cookie\u3001\u5229\u7528\u6846\u67b6\u7684\u5185\u7f6e\u9632\u62a4\u548c DOMPurify \u51c0\u5316\u3002<\/li>\n<li><strong>CSRF \u9632\u5fa1<\/strong>\uff1a\u4f7f\u7528 CSRF Token\u3001\u8bbe\u7f6e SameSite Cookie\u3001\u9a8c\u8bc1\u8bf7\u6c42\u6765\u6e90\u3002<\/li>\n<\/ul>\n<p><strong>\u6700\u4f73\u5b9e\u8df5\u6e05\u5355\uff1a<\/strong><\/p>\n<ol>\n<li><strong>\u540e\u7aef\u4fe1\u4efb\u8fb9\u754c<\/strong>\uff1a\u6c38\u8fdc\u4e0d\u8981\u4fe1\u4efb\u524d\u7aef\u4f20\u8fc7\u6765\u7684\u6570\u636e\uff0c\u6240\u6709\u8f93\u5165\u5fc5\u987b\u7ecf\u8fc7\u540e\u7aef\u9a8c\u8bc1\u548c\u8fc7\u6ee4\u3002<\/li>\n<li><strong>\u8f93\u51fa\u8f6c\u4e49<\/strong>\uff1a\u5728\u5c06\u6570\u636e\u63d2\u5165 HTML \u65f6\uff0c\u6839\u636e\u4e0a\u4e0b\u6587\u8fdb\u884c\u8f6c\u4e49\u3002<\/li>\n<li><strong>CSP \u4f5c\u4e3a\u7eb5\u6df1\u9632\u5fa1<\/strong>\uff1a\u5373\u4f7f\u5176\u4ed6\u9632\u5fa1\u5931\u6548\uff0cCSP \u4e5f\u80fd\u63d0\u4f9b\u6700\u540e\u4e00\u9053\u9632\u7ebf\u3002<\/li>\n<li><strong>CSRF Token \u5fc5\u987b\u7ed1\u5b9a\u4f1a\u8bdd<\/strong>\uff1aToken \u5e94\u5b58\u50a8\u5728\u670d\u52a1\u7aef\uff0c\u4e14\u6bcf\u6b21\u8bf7\u6c42\u9a8c\u8bc1\u3002<\/li>\n<li><strong>\u4f7f\u7528\u73b0\u4ee3\u6846\u67b6\u7684\u5b89\u5168\u7279\u6027<\/strong>\uff1aReact\u3001Vue \u7b49\u6846\u67b6\u9ed8\u8ba4\u8f6c\u4e49\uff0c\u4f46\u9700\u6ce8\u610f\u5371\u9669 API\u3002<\/li>\n<\/ol>\n<p><strong>\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li>OWASP XSS \u9632\u62a4\u6307\u5357<\/li>\n<li>CSP \u89c4\u8303\u8be6\u89e3<\/li>\n<li>SameSite Cookie \u7684\u6d4f\u89c8\u5668\u517c\u5bb9\u6027<\/li>\n<\/ul>\n<p>\u5b89\u5168\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b\uff0c\u5e0c\u671b\u672c\u6587\u80fd\u5e2e\u52a9\u4f60\u5efa\u7acb\u524d\u7aef\u5b89\u5168\u7684\u610f\u8bc6\uff0c\u5e76\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u52a0\u4ee5\u5e94\u7528\u3002\u5982\u679c\u4f60\u6709\u4efb\u4f55\u95ee\u9898\u6216\u89c1\u89e3\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4ea4\u6d41\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u6df1\u5165\u6d45\u51fa\u5730\u8bb2\u89e3 XSS \u4e0e CSRF \u7684\u653b\u51fb\u539f\u7406\uff0c\u5e76\u901a\u8fc7\u771f\u5b9e\u53ef\u8fd0\u884c\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u624b\u628a\u624b\u6559\u4f60\u6784\u5efa\u524d\u7aef\u5b89\u5168\u9632\u7ebf\u3002\u6db5\u76d6\u8f93\u5165\u8fc7\u6ee4\u3001CSP\u3001HttpOnly\u3001CSRF Token \u7b49\u6838\u5fc3\u9632\u5fa1\u624b\u6bb5\uff0c\u52a9\u4f60\u6253\u9020\u5b89\u5168\u53ef\u9760\u7684\u5e94\u7528\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[208,178,37,5,207,206],"class_list":["post-237","post","type-post","status-publish","format-standard","hentry","category-3","category-4","tag-csp","tag-csrf","tag-javascript","tag-node-js","tag-xss","tag-206"],"_links":{"self":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=237"}],"version-history":[{"count":0,"href":"https:\/\/yykcj.com\/index.php?rest_route=\/wp\/v2\/posts\/237\/revisions"}],"wp:attachment":[{"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yykcj.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}