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基于Cookie的SSO单点登录系统设计与实现

news 2025/9/18 15:56:55

基于Cookie的SSO单点登录系统设计与实现

前言

在现代Web应用生态中，用户往往需要在多个相关应用间切换使用。传统的独立登录方式不仅用户体验差，也增加了密码管理的复杂性。单点登录（Single Sign-On，SSO）技术应运而生，让用户只需登录一次即可访问所有相关应用。

本文将深入探讨基于Cookie的SSO实现方案，从技术原理到具体实现，为你提供一套完整的解决方案。

什么是SSO单点登录

核心概念

单点登录（SSO）是一种身份验证服务，允许用户使用一组登录凭据访问多个相关但独立的软件系统。用户只需要登录一次，就可以访问所有相互信任的应用系统，无需重复输入用户名和密码。

业务价值

对用户而言：

  • 减少密码记忆负担

  • 提升使用体验

  • 降低密码泄露风险

对企业而言：

  • 统一身份管理

  • 降低运维成本

  • 提高安全性

  • 改善用户留存

技术架构设计

整体架构

┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   应用A         │    │   应用B         │    │   应用C         │
│  app-a.com      │    │  app-b.com      │    │  app-c.com      │
└─────────┬───────┘    └─────────┬───────┘    └─────────┬───────┘│                      │                      │└──────────────────────┼──────────────────────┘│┌─────────────┴───────────┐│     SSO认证中心         ││    sso.example.com     ││  Cookie域: .example.com │└─────────────────────────┘

核心组件

  1. SSO认证中心：负责用户身份验证和Token颁发

  2. 业务应用：各个需要登录的应用系统

  3. 共享Cookie：在同根域名下共享登录状态

  4. 前端SDK：封装SSO逻辑的JavaScript库

Cookie共享机制

基于Cookie的SSO方案利用浏览器的同源策略特性：

  • 认证中心域名：sso.example.com

  • Cookie域设置：.example.com

  • 应用域名：app-a.example.com、app-b.example.com

  • 共享原理：设置Cookie的domain为.example.com，所有子域名都可以访问

SSO工作流程

  1. 用户访问应用A (app-a.example.com)
  2. 应用A检查Cookie中是否有有效Token
  3. 如无Token，重定向到SSO认证中心 (sso.example.com)
  4. 用户在认证中心完成登录
  5. 认证中心验证用户身份，生成Token
  6. 认证中心设置跨域Cookie (domain=.example.com)
  7. 重定向回应用A，携带Token参数
  8. 应用A获取Token，完成登录
  9. 用户访问应用B时，直接从Cookie读取Token，无需重新登录

核心实现

1. SSO认证中心实现

在介绍客户端实现之前，我们先了解SSO认证中心的核心功能和实现：

认证中心核心接口
// SSO认证中心的主要接口定义
interface SSOServerAPI {// 登录页面GET /login: (app_id: string, redirect_uri: string, state?: string) => LoginPage;// 处理登录请求POST /login: (username: string, password: string, app_id: string) => LoginResult;// 注册页面GET /register: (app_id: string, redirect_uri: string) => RegisterPage;// 处理注册请求POST /register: (userInfo: RegisterInfo, app_id: string) => RegisterResult;// 检查登录状态（用于iframe方式）GET /check-status: (app_id: string) => StatusResult;// 退出登录GET /logout: (app_id: string, redirect_uri?: string) => LogoutResult;// Token验证接口POST /verify-token: (token: string) => TokenVerifyResult;
}
认证中心后端实现示例（Node.js + Express）
import express from "express";
import jwt from "jsonwebtoken";
import bcrypt from "bcrypt";
import cookieParser from "cookie-parser";const app = express();
app.use(cookieParser());
app.use(express.json());
app.use(express.urlencoded({ extended: true }));// JWT密钥配置
const JWT_SECRET = process.env.JWT_SECRET || "your-secret-key";
const COOKIE_DOMAIN = ".example.com";// 用户数据存储（实际项目中应使用数据库）
const users = new Map();
const registeredApps = new Map([["app-001",{ name: "Application A", redirectUris: ["https://app-a.example.com"] }],["app-002",{ name: "Application B", redirectUris: ["https://app-b.example.com"] }]
]);// 登录页面
app.get("/login", (req, res) => {const { app_id, redirect_uri, state } = req.query;// 验证应用ID和回调地址if (!validateApp(app_id as string, redirect_uri as string)) {return res.status(400).json({ error: "Invalid app_id or redirect_uri" });}// 检查是否已登录const existingToken = req.cookies.access_token;if (existingToken && verifyToken(existingToken)) {// 已登录，直接重定向return redirectWithToken(res,redirect_uri as string,existingToken,state as string);}// 渲染登录页面res.send(generateLoginPage(app_id as string, redirect_uri as string, state as string));
});// 处理登录请求
app.post("/login", async (req, res) => {const { username, password, app_id, redirect_uri, state } = req.body;try {// 验证用户凭据const user = await authenticateUser(username, password);if (!user) {return res.status(401).json({ error: "用户名或密码错误" });}// 生成JWT Tokenconst token = jwt.sign({userId: user.id,username: user.username,email: user.email,exp: Math.floor(Date.now() / 1000) + 24 * 60 * 60 // 24小时过期},JWT_SECRET);// 设置跨域Cookieres.cookie("access_token", token, {domain: COOKIE_DOMAIN,httpOnly: false, // 允许客户端JavaScript访问secure: process.env.NODE_ENV === "production",sameSite: "lax",maxAge: 24 * 60 * 60 * 1000 // 24小时});// 重定向回应用redirectWithToken(res, redirect_uri, token, state);} catch (error) {console.error("Login error:", error);res.status(500).json({ error: "登录失败" });}
});// 检查登录状态（用于iframe方式）
app.get("/check-status", (req, res) => {const { app_id } = req.query;const token = req.cookies.access_token;if (token && verifyToken(token)) {// 通过postMessage发送Token给父窗口res.send(`<script>window.parent.postMessage({token: '${token}',status: 'authenticated'}, '*');</script>`);} else {res.send(`<script>window.parent.postMessage({status: 'unauthenticated'}, '*');</script>`);}
});// 退出登录
app.get("/logout", (req, res) => {const { redirect_uri } = req.query;// 清除Cookieres.clearCookie("access_token", {domain: COOKIE_DOMAIN,path: "/"});// 重定向到指定页面或默认页面const redirectUrl = redirect_uri || "https://sso.example.com/logged-out";res.redirect(redirectUrl);
});// Token验证接口
app.post("/verify-token", (req, res) => {const { token } = req.body;try {const decoded = jwt.verify(token, JWT_SECRET);res.json({ valid: true, user: decoded });} catch (error) {res.json({ valid: false, error: "Invalid token" });}
});// 工具函数
function validateApp(appId: string, redirectUri: string): boolean {const app = registeredApps.get(appId);if (!app) return false;return app.redirectUris.some((uri) => redirectUri.startsWith(uri));
}function verifyToken(token: string): boolean {try {jwt.verify(token, JWT_SECRET);return true;} catch {return false;}
}async function authenticateUser(username: string, password: string) {const user = users.get(username);if (!user) return null;const isValid = await bcrypt.compare(password, user.passwordHash);return isValid ? user : null;
}function redirectWithToken(res: express.Response,redirectUri: string,token: string,state?: string
) {const url = new URL(redirectUri);url.searchParams.set("token", token);if (state) url.searchParams.set("state", state);res.redirect(url.toString());
}function generateLoginPage(appId: string,redirectUri: string,state: string
): string {return `<!DOCTYPE html><html><head><title>SSO登录</title><style>body { font-family: Arial, sans-serif; max-width: 400px; margin: 100px auto; padding: 20px; }.form-group { margin-bottom: 15px; }label { display: block; margin-bottom: 5px; }input { width: 100%; padding: 8px; border: 1px solid #ddd; border-radius: 4px; }button { width: 100%; padding: 10px; background: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; }button:hover { background: #0056b3; }.error { color: red; margin-top: 10px; }</style></head><body><h2>用户登录</h2><form id="loginForm" method="POST" action="/login"><input type="hidden" name="app_id" value="${appId}"><input type="hidden" name="redirect_uri" value="${redirectUri}"><input type="hidden" name="state" value="${state}"><div class="form-group"><label for="username">用户名:</label><input type="text" id="username" name="username" required></div><div class="form-group"><label for="password">密码:</label><input type="password" id="password" name="password" required></div><button type="submit">登录</button><div id="error" class="error"></div></form><script>document.getElementById('loginForm').addEventListener('submit', async (e) => {e.preventDefault();const formData = new FormData(e.target);try {const response = await fetch('/login', {method: 'POST',body: formData});if (response.redirected) {window.location.href = response.url;} else {const result = await response.json();if (result.error) {document.getElementById('error').textContent = result.error;}}} catch (error) {document.getElementById('error').textContent = '登录失败，请重试';}});</script></body></html>`;
}app.listen(3000, () => {console.log("SSO Server running on port 3000");
});
认证中心数据库设计
-- 用户表
CREATE TABLE users (id BIGINT PRIMARY KEY AUTO_INCREMENT,username VARCHAR(50) UNIQUE NOT NULL,email VARCHAR(100) UNIQUE NOT NULL,password_hash VARCHAR(255) NOT NULL,created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,status ENUM('active', 'inactive', 'locked') DEFAULT 'active'
);-- 应用注册表
CREATE TABLE registered_apps (id BIGINT PRIMARY KEY AUTO_INCREMENT,app_id VARCHAR(50) UNIQUE NOT NULL,app_name VARCHAR(100) NOT NULL,app_secret VARCHAR(255) NOT NULL,redirect_uris JSON NOT NULL,created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,status ENUM('active', 'inactive') DEFAULT 'active'
);-- 登录会话表
CREATE TABLE user_sessions (id BIGINT PRIMARY KEY AUTO_INCREMENT,user_id BIGINT NOT NULL,session_token VARCHAR(255) NOT NULL,app_id VARCHAR(50) NOT NULL,expires_at TIMESTAMP NOT NULL,created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,FOREIGN KEY (user_id) REFERENCES users(id),FOREIGN KEY (app_id) REFERENCES registered_apps(app_id),INDEX idx_session_token (session_token),INDEX idx_user_app (user_id, app_id)
);-- 登录日志表
CREATE TABLE login_logs (id BIGINT PRIMARY KEY AUTO_INCREMENT,user_id BIGINT,app_id VARCHAR(50),ip_address VARCHAR(45),user_agent TEXT,login_result ENUM('success', 'failed') NOT NULL,failure_reason VARCHAR(255),created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,INDEX idx_user_time (user_id, created_at),INDEX idx_app_time (app_id, created_at)
);

2. SSO客户端SDK

首先，我们需要实现一个SSO客户端SDK来处理登录流程：

interface SSOConfig {ssoHost: string; // SSO认证中心地址cookieName: string; // Token存储的Cookie名称cookieDomain: string; // Cookie域名appId: string; // 应用标识redirectUri?: string; // 登录成功后的回调地址
}interface SSOCallbacks {onSuccess?: (token: string) => void;onError?: (error: Error) => void;onLogout?: () => void;
}class SSOClient {private config: SSOConfig;private callbacks: SSOCallbacks;constructor(config: SSOConfig, callbacks: SSOCallbacks = {}) {this.config = config;this.callbacks = callbacks;}/*** 检查是否已登录*/isAuthenticated(): boolean {const token = this.getToken();return token !== null && this.isTokenValid(token);}/*** 获取当前Token*/getToken(): string | null {return this.getCookie(this.config.cookieName);}/*** 跳转到登录页面*/login(): void {const loginUrl = this.buildLoginUrl();window.location.href = loginUrl;}/*** 跳转到注册页面*/register(): void {const registerUrl = this.buildRegisterUrl();window.location.href = registerUrl;}/*** 退出登录*/logout(): void {// 清除本地Tokenthis.clearToken();// 跳转到SSO退出页面，清除认证中心的登录状态const logoutUrl = this.buildLogoutUrl();window.location.href = logoutUrl;}/*** 处理SSO回调*/handleCallback(): void {const urlParams = new URLSearchParams(window.location.search);const token = urlParams.get("token");const error = urlParams.get("error");if (error) {this.callbacks.onError?.(new Error(error));return;}if (token && token !== "null") {this.setToken(token);this.callbacks.onSuccess?.(token);// 清理URL参数this.cleanUrl();} else {this.callbacks.onError?.(new Error("未获取到有效Token"));}}/*** 初始化SSO检查*/async init(): Promise<void> {// 首先检查URL中是否有回调参数if (this.hasCallbackParams()) {this.handleCallback();return;}// 检查本地是否有有效Tokenif (this.isAuthenticated()) {const token = this.getToken()!;this.callbacks.onSuccess?.(token);return;}// 尝试从SSO认证中心获取Tokentry {await this.checkSSOStatus();} catch (error) {this.callbacks.onError?.(error as Error);}}// 私有方法实现private buildLoginUrl(): string {const params = new URLSearchParams({app_id: this.config.appId,redirect_uri: this.config.redirectUri || window.location.href,response_type: "token"});return `${this.config.ssoHost}/login?${params.toString()}`;}private buildRegisterUrl(): string {const params = new URLSearchParams({app_id: this.config.appId,redirect_uri: this.config.redirectUri || window.location.href});return `${this.config.ssoHost}/register?${params.toString()}`;}private buildLogoutUrl(): string {const params = new URLSearchParams({app_id: this.config.appId,redirect_uri: window.location.origin});return `${this.config.ssoHost}/logout?${params.toString()}`;}private async checkSSOStatus(): Promise<void> {// 通过iframe方式检查SSO状态，避免页面跳转return new Promise((resolve, reject) => {const iframe = document.createElement("iframe");iframe.style.display = "none";iframe.src = `${this.config.ssoHost}/check-status?app_id=${this.config.appId}`;const messageHandler = (event: MessageEvent) => {if (event.origin !== new URL(this.config.ssoHost).origin) {return;}window.removeEventListener("message", messageHandler);document.body.removeChild(iframe);if (event.data.token) {this.setToken(event.data.token);this.callbacks.onSuccess?.(event.data.token);resolve();} else {reject(new Error("未登录"));}};window.addEventListener("message", messageHandler);document.body.appendChild(iframe);// 超时处理setTimeout(() => {window.removeEventListener("message", messageHandler);if (document.body.contains(iframe)) {document.body.removeChild(iframe);}reject(new Error("SSO检查超时"));}, 5000);});}private setToken(token: string): void {this.setCookie(this.config.cookieName, token, {domain: this.config.cookieDomain,path: "/",secure: location.protocol === "https:",sameSite: "lax"});}private clearToken(): void {this.setCookie(this.config.cookieName, "", {domain: this.config.cookieDomain,path: "/",expires: new Date(0)});}private isTokenValid(token: string): boolean {try {// 简单的JWT格式检查const parts = token.split(".");if (parts.length !== 3) return false;// 检查是否过期（需要解析JWT payload）const payload = JSON.parse(atob(parts[1]));const now = Math.floor(Date.now() / 1000);return payload.exp > now;} catch {return false;}}private hasCallbackParams(): boolean {const urlParams = new URLSearchParams(window.location.search);return urlParams.has("token") || urlParams.has("error");}private cleanUrl(): void {const url = new URL(window.location.href);url.searchParams.delete("token");url.searchParams.delete("error");window.history.replaceState({}, document.title, url.toString());}// Cookie操作工具方法private getCookie(name: string): string | null {const value = `; ${document.cookie}`;const parts = value.split(`; ${name}=`);if (parts.length === 2) {return parts.pop()?.split(";").shift() || null;}return null;}private setCookie(name: string, value: string, options: any = {}): void {let cookieString = `${name}=${value}`;if (options.domain) cookieString += `; domain=${options.domain}`;if (options.path) cookieString += `; path=${options.path}`;if (options.expires)cookieString += `; expires=${options.expires.toUTCString()}`;if (options.secure) cookieString += `; secure`;if (options.sameSite) cookieString += `; samesite=${options.sameSite}`;document.cookie = cookieString;}
}

2. Vue应用集成

在Vue应用中集成SSO功能：

// main.ts
import { createApp } from "vue";
import App from "./App.vue";
import { SSOClient } from "./utils/sso-client";const app = createApp(App);// 配置SSO
const ssoClient = new SSOClient({ssoHost: "https://sso.example.com",cookieName: "access_token",cookieDomain: ".example.com",appId: "your-app-id"},{onSuccess: (token) => {console.log("SSO登录成功", token);// 可以在这里调用用户信息接口},onError: (error) => {console.error("SSO登录失败", error);}}
);// 全局挂载
app.config.globalProperties.$sso = ssoClient;
window.__SSO_CLIENT__ = ssoClient;// 应用启动前初始化SSO
ssoClient.init().finally(() => {app.mount("#app");
});

<!-- App.vue -->
<template><div id="app"><header><div v-if="isAuthenticated"><span>欢迎，{{ userInfo.name }}</span><button @click="logout">退出登录</button></div><div v-else><button @click="login">登录</button><button @click="register">注册</button></div></header><main><router-view /></main></div>
</template><script setup lang="ts">
import { ref, onMounted } from "vue";const isAuthenticated = ref(false);
const userInfo = ref({});onMounted(() => {// 检查登录状态isAuthenticated.value = window.__SSO_CLIENT__.isAuthenticated();if (isAuthenticated.value) {// 获取用户信息fetchUserInfo();}
});const login = () => {window.__SSO_CLIENT__.login();
};const register = () => {window.__SSO_CLIENT__.register();
};const logout = () => {window.__SSO_CLIENT__.logout();
};const fetchUserInfo = async () => {try {const token = window.__SSO_CLIENT__.getToken();const response = await fetch("/api/user/profile", {headers: {Authorization: `Bearer ${token}`}});userInfo.value = await response.json();} catch (error) {console.error("获取用户信息失败", error);}
};
</script>

3. 路由守卫

实现路由级别的登录检查：

// router/index.ts
import { createRouter, createWebHistory } from "vue-router";const router = createRouter({history: createWebHistory(),routes: [{path: "/",name: "Home",component: () => import("@/views/Home.vue")},{path: "/dashboard",name: "Dashboard",component: () => import("@/views/Dashboard.vue"),meta: { requiresAuth: true }}]
});// 全局前置守卫
router.beforeEach((to, from, next) => {const requiresAuth = to.matched.some((record) => record.meta.requiresAuth);if (requiresAuth) {const ssoClient = window.__SSO_CLIENT__;if (ssoClient.isAuthenticated()) {next();} else {// 保存目标路由，登录成功后跳转sessionStorage.setItem("redirect_after_login", to.fullPath);ssoClient.login();}} else {next();}
});export default router;

开发环境适配

跨域问题解决

在开发环境中，由于域名不同，无法直接使用Cookie共享。提供以下解决方案：

方案1：环境变量Token注入
class SSOClient {private getToken(): string | null {// 开发环境优先使用环境变量Tokenif (import.meta.env.DEV) {const devToken = import.meta.env.VITE_DEV_TOKEN;if (devToken && devToken !== "undefined") {console.log("使用开发环境Token");return devToken;}}// 生产环境从Cookie读取return this.getCookie(this.config.cookieName);}
}

环境变量配置：

# .env.development
VITE_DEV_TOKEN=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
方案2：代理配置
// vite.config.ts
export default defineConfig({server: {proxy: {"/sso-api": {target: "https://sso.example.com",changeOrigin: true,rewrite: (path) => path.replace(/^/sso-api/, "")}}}
});
方案3：本地域名映射

修改hosts文件：

127.0.0.1 local.example.com

然后使用 http://local.example.com:3000 访问应用。

安全考虑

1. Token安全

// JWT Token验证
private isTokenValid(token: string): boolean {try {const parts = token.split('.');if (parts.length !== 3) return false;const payload = JSON.parse(atob(parts[1]));const now = Math.floor(Date.now() / 1000);// 检查过期时间if (payload.exp <= now) return false;// 检查签发者if (payload.iss !== 'your-sso-issuer') return false;return true;} catch {return false;}
}

2. CSRF防护

// 添加CSRF Token
private buildLoginUrl(): string {const csrfToken = this.generateCSRFToken();sessionStorage.setItem('csrf_token', csrfToken);const params = new URLSearchParams({app_id: this.config.appId,redirect_uri: this.config.redirectUri || window.location.href,state: csrfToken  // 用于CSRF防护});return `${this.config.ssoHost}/login?${params.toString()}`;
}private generateCSRFToken(): string {return Math.random().toString(36).substring(2) + Date.now().toString(36);
}

3. Cookie安全设置

private setToken(token: string): void {this.setCookie(this.config.cookieName, token, {domain: this.config.cookieDomain,path: '/',secure: true,        // 仅HTTPS传输httpOnly: false,     // 允许JS访问（SSO需要）sameSite: 'strict'   // 严格同站策略});
}

最佳实践

1. 错误处理

class SSOError extends Error {constructor(message: string,public code: string,public details?: any) {super(message);this.name = 'SSOError';}
}// 统一错误处理
private handleError(error: any): void {let ssoError: SSOError;if (error instanceof SSOError) {ssoError = error;} else {ssoError = new SSOError('SSO未知错误', 'UNKNOWN_ERROR', error);}// 记录错误日志console.error('SSO Error:', ssoError);// 触发错误回调this.callbacks.onError?.(ssoError);
}

2. 性能优化

// Token缓存
private tokenCache: { token: string; timestamp: number } | null = null;
private readonly CACHE_DURATION = 5 * 60 * 1000; // 5分钟private getToken(): string | null {const now = Date.now();// 使用缓存的Tokenif (this.tokenCache && (now - this.tokenCache.timestamp) < this.CACHE_DURATION) {return this.tokenCache.token;}const token = this.getCookie(this.config.cookieName);if (token) {this.tokenCache = { token, timestamp: now };}return token;
}

3. 监控和日志

// SSO事件监控
class SSOMonitor {private events: Array<{ type: string; timestamp: number; data?: any }> = [];logEvent(type: string, data?: any): void {this.events.push({type,timestamp: Date.now(),data});// 发送到监控系统this.sendToMonitoring({ type, data });}private sendToMonitoring(event: any): void {// 实现监控数据上报if (typeof window !== "undefined" && window.gtag) {window.gtag("event", "sso_event", {event_category: "SSO",event_label: event.type,custom_parameter: event.data});}}
}

部署配置

Nginx配置示例

# SSO认证中心
server {listen 443 ssl;server_name sso.example.com;ssl_certificate /path/to/cert.pem;ssl_certificate_key /path/to/key.pem;location / {proxy_pass http://sso-backend;proxy_set_header Host $host;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;proxy_set_header X-Forwarded-Proto $scheme;}
}# 业务应用
server {listen 443 ssl;server_name app.example.com;ssl_certificate /path/to/cert.pem;ssl_certificate_key /path/to/key.pem;location / {try_files $uri $uri/ /index.html;}# API代理location /api/ {proxy_pass http://app-backend;proxy_set_header Authorization $http_authorization;}
}

Docker部署

# Dockerfile
FROM nginx:alpineCOPY dist/ /usr/share/nginx/html/
COPY nginx.conf /etc/nginx/nginx.confEXPOSE 80CMD ["nginx", "-g", "daemon off;"]

# docker-compose.yml
version: "3.8"services:sso-frontend:build: .ports:- "80:80"environment:- VITE_SSO_HOST=https://sso.example.com- VITE_COOKIE_DOMAIN=.example.comnetworks:- sso-networkapp-frontend:build: .ports:- "81:80"environment:- VITE_SSO_HOST=https://sso.example.com- VITE_COOKIE_DOMAIN=.example.com- VITE_APP_ID=app-001networks:- sso-networknetworks:sso-network:driver: bridge

总结

基于Cookie的SSO方案具有以下特点：

优势：

  • ✅ 实现简单，兼容性好

  • ✅ 用户体验流畅

  • ✅ 安全性较高

  • ✅ 支持多种前端框架

限制：

  • ❌ 需要同根域名

  • ❌ 受浏览器Cookie策略限制

  • ❌ 跨域场景需要特殊处理

适用场景：

  • 企业内部多应用系统

  • 同一产品的多个子系统

  • 需要无缝登录体验的场景

通过本文的详细介绍，你应该能够理解并实现一套完整的基于Cookie的SSO系统。在实际项目中，还需要根据具体需求进行调整和优化，特别是在安全性、性能和用户体验方面。

希望这篇文章对你有所帮助！如果你有任何问题或建议，欢迎在评论区讨论。

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