身份验证与授权
在不同微前端之间实现稳健的身份验证和授权机制。
身份验证与授权 是 CoddyKit 上的免费 Micro Frontends Architecture with Module Federation 课时。 这是第 1 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Micro Frontends Architecture with Module Federation 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Micro Frontends Architecture with Module Federation 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Auth & Auth in MFEs
Welcome to Authentication & Authorization in Micro Frontends! Securing federated applications brings unique challenges compared to monolithic apps.
We need robust ways to verify user identities (authentication) and control what they can access (authorization) across independently developed and deployed Micro Frontends.
Centralized Authentication Need
In a Micro Frontend architecture, users interact with multiple separate applications. If each MFE handled authentication independently, users would face multiple login prompts.
This leads to a poor user experience and complex session management. A centralized authentication mechanism is crucial for seamless navigation.
Identity Providers (IdP)
A common solution is to use an Identity Provider (IdP). This is a service that creates, maintains, and manages identity information for users and authenticates them.
- Examples: Auth0, Okta, Keycloak, or a custom OAuth 2.0/OpenID Connect server.
- The IdP handles the login process and issues security tokens (like JWTs) upon successful authentication.
Authentication Flow Overview
Here's a simplified centralized authentication flow:
- User tries to access any MFE.
- If not authenticated, they are redirected to the central IdP login page.
- User logs in with the IdP.
- IdP redirects the user back to the MFE with a security token.
- The MFE stores this token (e.g., in an HTTP-only cookie or local storage).
All subsequent requests from any MFE will use this token.
Sharing Authentication State
Once a user is authenticated, their session or token needs to be available to all Micro Frontends. Common strategies for sharing state:
- HTTP-Only Cookies: Secure and automatically sent with requests.
- Web Storage (localStorage/sessionStorage): Accessible across same-origin domains.
- Shared Libraries/Context: A shared utility that wraps token management, often exposed via Module Federation.
Each method has its trade-offs regarding security and ease of implementation.
Authorization Explained
While authentication verifies who you are, authorization determines what you can do.
- After authentication, the security token often contains user roles or permissions.
- Each Micro Frontend is then responsible for checking these permissions before granting access to specific features or data.
Role-Based Access Control (RBAC)
Role-Based Access Control (RBAC) is a popular authorization strategy. Users are assigned roles (e.g., 'admin', 'editor', 'viewer'), and each role has specific permissions.
Micro Frontends simply check the user's roles against the required roles for a given action or component.
Implementing Auth Checks
Each Micro Frontend or its backend API can implement authorization checks. This often involves:
- Decoding the security token to extract user roles/permissions.
- Comparing these against the required permissions for a specific action or UI element.
Here's a simple JavaScript example:
function hasPermission(userRoles, requiredRole) {
if (!userRoles || !requiredRole) return false;
return userRoles.includes(requiredRole);
}
// Imagine user roles are parsed from a JWT
const currentUserRoles = ["user", "editor"];
// Check if user can 'edit_post'
const canEdit = hasPermission(currentUserRoles, "editor");
// Check if user can 'delete_user'
const canDelete = hasPermission(currentUserRoles, "admin");
console.log("Can edit post?", canEdit);
console.log("Can delete user?", canDelete);Security Best Practices
Securing your federated applications requires vigilance:
- HTTPS: Always use HTTPS for all communication.
- Token Storage: Store sensitive tokens securely (e.g., HTTP-only cookies over localStorage).
- CORS: Properly configure Cross-Origin Resource Sharing policies.
- Input Validation: Always validate user input on both client and server sides.
- Regular Audits: Perform security audits and keep dependencies updated.
Order the Auth Flow
Drag and drop the steps to correctly order a user's initial authentication flow in a federated application using an Identity Provider (IdP).
Recap: Secure MFEs
We've covered the essentials of authentication and authorization in Micro Frontends. Key takeaways:
- Centralized authentication via an Identity Provider ensures a smooth user experience.
- Security tokens (like JWTs) carry authentication and authorization data.
- Strategies like HTTP-only cookies or shared libraries help share authentication state.
- Authorization (e.g., RBAC) dictates what users can do, based on roles/permissions in their token.
- Always follow security best practices like HTTPS and secure token storage.
Next, we'll explore cross-application security risks!
常见问题解答
「身份验证与授权」课时是免费的吗？
是的 — 「身份验证与授权」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Micro Frontends Architecture with Module Federation 课程的其余内容，请升级到 CoddyKit PRO。 Micro Frontends Architecture with Module Federation 课程共包含 4 节课。
「身份验证与授权」这节课中我会学到什么？
在不同微前端之间实现稳健的身份验证和授权机制。 你通过在浏览器中直接运行的动手代码来练习 Micro Frontends Architecture with Module Federation，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Micro Frontends Architecture with Module Federation 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Micro Frontends Architecture with Module Federation 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 1 节课，共 4 节。
「身份验证与授权」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Micro Frontends Architecture with Module Federation 课中编写并运行代码吗？
能。每节 Micro Frontends Architecture with Module Federation 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。