OAuth2 登录后重定向到前端(在不同的 URL 上) [英] Redirect to Frontend ( On A Different URL ) after OAuth2 Login

问题描述

我正在尝试按如下方式设置我的应用程序:

1. Angular 7 前端，例如 http://localhost:4200
2. Express 后端，服务于，例如 http://localhost:3500
3. 用于 OAuth2 身份验证的 Passport 库

我正在从服务器端 (Express/Node.js) 设置 OAuth2 流.在前端点击登录按钮，请求被发送到服务器，它被重定向到 Google 以要求提供用户凭据/权限等.

我的回调 URL 是:http://localhost:3500/auth/callback.>

登录成功后，什么是重定向回前端 URL 的好方法，即 http://localhost:4200/ ??由于回调 URL 在服务器端

解决方案

我最终决定采用以下策略:

Passport Strategy 设置如下:

/*** 用于 Google oauth2 身份验证的路由处理程序.* 第一个处理程序启动身份验证流程.* 第二个处理程序接收来自 Google 的响应.如果失败，我们将* 重定向到预先确定的可配置路由.如果成功，我们会发出一个 Json* Web 令牌，并重定向到预先确定的、可配置的路由.*/this.router.get('/google', (req: Request, res: Response, next: NextFunction) => {护照.认证('谷歌'，{范围:process.env.GOOGLE_OAUTH2_SCOPES.split(",")})(req, res, next);});this.router.get('/google/callback',passport.authenticate('google', { failureRedirect:process.env.AUTH_FAILURE_REDIRECT }), (req, res) =>this.jwtAuthService.issueJWTEnhanced(req, res, 'google'));

issueJwtEnhanced 定义如下:

/*** 用于将 JWT 作为身份验证流程的一部分发布的中间件.* @param req Express HttpRequest 对象* @param res Express HttpResponse 对象*/issueJWTEnhanced(req: any, res: Response, loginMech: string ) {this.logger.info('内部 JWT 发行服务');this.logger.info('UserID:' + req.user._id);jwt.sign({userId: req.user._id, loginMethod: loginMech}, process.env.JWT_SECRET, {expiresIn: '5 min'}, (err, token) => {如果(错误){this.logger.error('尝试发出 JWT 时出错:' + err);this.logger.error(JSON.stringify(err));返回 res.redirect(process.env.AUTH_FAILURE_REDIRECT);}别的{this.logger.info('成功发布JWT');this.logger.info('JWT 已发布:' + 令牌);返回 res.redirect(process.env.AUTH_SUCCESS_REDIRECT + '/' + token);}});}

哪里，

AUTH_SUCCESS_REDIRECT='http://localhost:4200/login-success'AUTH_FAILURE_REDIRECT='http://localhost:4200/login/'

I am trying to setup my application as follow :

1. Angular 7 frontend, served at, say http://localhost:4200
2. Express backend, served at, say http://localhost:3500
3. Passport library for OAuth2 Authentication

I am setting up OAuth2 flow from the serverside (Express / Node.js). On clicking the Login button from the frontend, request is sent to the server, which gets redirected to Google to ask for user credentials / permissions etc.

My callback URL is : http://localhost:3500/auth/callback.

Post successful login, what is a good way to redirect back to the Frontend URL i.e. http://localhost:4200/ ?? Since the callback URL is on the serverside

解决方案

I finally decided to go with the following strategy:

Passport Strategy setup as follows:

/**
 * Route handlers for Google oauth2 authentication. 
 * The first handler initiates the authentication flow. 
 * The second handler receives the response from Google. In case of failure, we will 
 * redirect to a pre-determined configurable route. In case of success, we issue a Json 
 * Web Token, and redirect to a pre-determined, configurable route.
 */

 this.router.get('/google', (req: Request, res: Response, next: NextFunction) => {
      passport.authenticate('google', {
          scope: process.env.GOOGLE_OAUTH2_SCOPES.split(",")
      })(req, res, next);
 });

 this.router.get('/google/callback',
      passport.authenticate('google', { failureRedirect:process.env.AUTH_FAILURE_REDIRECT }), (req, res) => this.jwtAuthService.issueJWTEnhanced(req, res, 'google'));

issueJwtEnhanced is defined as follows:

/**
 * Middleware for issuing JWT as part of the authentication flow. 
 * @param req Express HttpRequest Object
 * @param res Express HttpResponse Object
 */
 issueJWTEnhanced(req: any, res: Response, loginMech: string ) {
        this.logger.info('Inside JWT issuing service');
        this.logger.info('UserID: ' + req.user._id);
        jwt.sign({userId: req.user._id, loginMethod: loginMech}, process.env.JWT_SECRET, {expiresIn: '5 min'}, (err, token) => {
            if(err){
                this.logger.error('Error while trying to issue JWT: ' + err);
                this.logger.error(JSON.stringify(err));
                return res.redirect(process.env.AUTH_FAILURE_REDIRECT);
            }else{
                this.logger.info('Successfully issued JWT');
                this.logger.info('JWT Issued: ' + token);
                return res.redirect(process.env.AUTH_SUCCESS_REDIRECT + '/' + token);
            }
        }); 
    }

Where,

AUTH_SUCCESS_REDIRECT='http://localhost:4200/login-success' AUTH_FAILURE_REDIRECT='http://localhost:4200/login/'

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