Spring Security Oauth2 单点登录案例实现和执行流程剖析
Spring Security Oauth2 单点登录案例实现和执行流程剖析
在线演示
演示地址：http://139.196.87.48:9002/kitty
用户名：admin 密码：admin
Spring Security Oauth2
OAuth是一个关于授权的开放网络标准，在全世界得到的广泛的应用，目前是2.0的版本。OAuth2在“客户端”与“服务提供商”之间，设置了一个授权层(authorization layer)。“客户端”不能直接登录“服务提供商”，只能登录授权层，以此将用户与客户端分离。“客户端”登录需要获取OAuth提供的令牌，否则将提示认证失败而导致客户端无法访问服务。关于OAuth2这里就不多作介绍了，网上资料详尽。下面我们实现一个 整合 SpringBoot 、Spring Security OAuth2 来实现单点登录功能的案例并对执行流程进行详细的剖析。
案例实现
项目介绍
这个单点登录系统包括下面几个模块：
spring-oauth-parent ： 父模块，管理打包
spring-oauth-server ： 认证服务端、资源服务端（端口：8881）
spring-oauth-client ： 单点登录客户端示例（端口：8882）
spring-oauth-client2： 单点登录客户端示例（端口：8883）
当通过任意客户端访问资源服务器受保护的接口时，会跳转到认证服务器的统一登录界面，要求登录，登录之后，在登录有效时间内任意客户端都无需再登录。
认证服务端
添加依赖
主要是添加 spring-security-oauth2 依赖。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-oauth-server</artifactId>
<name>spring-oauth-server</name>
<packaging>war</packaging>
<parent>
<groupId>com.louis</groupId>
<artifactId>spring-oauth-parent</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security.oauth</groupId>
<artifactId>spring-security-oauth2</artifactId>
<version>${oauth.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
</dependencies>
</project>
配置文件
配置文件内容如下。
application.yml
server:
port: 8881
servlet:
context-path: /auth
启动类
启动类添加 @EnableResourceServer 注解，表示作为资源服务器。
OAuthServerApplication.java
package com.louis.spring.oauth.server;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
@SpringBootApplication
@EnableResourceServer
public class OAuthServerApplication extends SpringBootServletInitializer {
public static void main(String[] args) {
SpringApplication.run(OAuthServerApplication.class, args);
}
}
认证服务配置
添加认证服务器配置，这里采用内存方式获取，其他方式获取在这里定制即可。
OAuthServerConfig.java
package com.louis.spring.oauth.server.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
@Configuration
@EnableAuthorizationServer
public class OAuthServerConfig extends AuthorizationServerConfigurerAdapter {
@Autowired
private BCryptPasswordEncoder passwordEncoder;
@Override
public void configure(final AuthorizationServerSecurityConfigurer oauthServer) throws Exception {
oauthServer.tokenKeyAccess("permitAll()").checkTokenAccess("isAuthenticated()");
}
@Override
public void configure(final ClientDetailsServiceConfigurer clients) throws Exception {
clients.inMemory()
.withClient("SampleClientId") // clientId, 可以类比为用户名
.secret(passwordEncoder.encode("secret")) // secret， 可以类比为密码
.authorizedGrantTypes("authorization_code") // 授权类型，这里选择授权码
.scopes("user_info") // 授权范围
.autoApprove(true) // 自动认证
.redirectUris("http://localhost:8882/login","http://localhost:8883/login") // 认证成功重定向URL
.accessTokenValiditySeconds(10); // 超时时间，10s
}
}
安全配置
Spring Security 安全配置。在安全配置类里我们配置了：
1. 配置请求URL的访问策略。
2. 自定义了同一认证登录页面URL。
3. 配置用户名密码信息从内存中创建并获取。
SecurityConfig.java
package com.louis.spring.oauth.server.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
@Configuration
@Order(1)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.requestMatchers()
.antMatchers("/login")
.antMatchers("/oauth/authorize")
.and()
.authorizeRequests()
.anyRequest().authenticated()
.and()
.formLogin().loginPage("/login").permitAll() // 自定义登录页面，这里配置了 loginPage, 就会通过 LoginController 的 login 接口加载登录页面
.and().csrf().disable();
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
// 配置用户名密码，这里采用内存方式，生产环境需要从数据库获取
auth.inMemoryAuthentication()
.withUser("admin")
.password(passwordEncoder().encode("123"))
.roles("USER");
}
@Bean
public BCryptPasswordEncoder passwordEncoder(){
return new BCryptPasswordEncoder();
}
}
接口提供
这里提供了一个自定义的登录接口，用于跳转到自定义的同一认证登录页面。
LoginController.java
package com.louis.spring.oauth.server.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
@Controller
public class LoginController {
/**
* 自定义登录页面
* @return
*/
@GetMapping("/login")
public String login() {
return "login";
}
}
登录页面放置在 resources/templates 下，需要在登录时提交 pos t表单到 auth/login。
login.ftl
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<script src="https://cdn.bootcss.com/vue/2.5.17/vue.min.js"></script>
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
</head>
<body>
<div class="login-box" id="app" >
<el-form action="/auth/login" method="post" label-position="left" label-width="0px" class="demo-ruleForm login-container">
<h2 class="title" >统一认证登录平台</h2>
<el-form-item>
<el-input type="text" name="username" v-model="username" auto-complete="off" placeholder="账号"></el-input>
</el-form-item>
<el-form-item>
<el-input type="password" name="password" v-model="password" auto-complete="off" placeholder="密码"></el-input>
</el-form-item>
<el-form-item style="width:100%; text-align:center;">
<el-button type="primary" style="width:47%;" @click.native.prevent="reset">重 置</el-button>
<el-button type="primary" style="width:47%;" native-type="submit" :loading="loading">登 录</el-button>
</el-form-item>
<el-form>
</div>
</body>
<script type="text/javascript">
new Vue({
el : '#app',
data : {
loading: false,
username: 'admin',
password: '123'
},
methods : {
}
})
</script>
<style lang="scss" scoped>
.login-container {
-webkit-border-radius: 5px;
border-radius: 5px;
-moz-border-radius: 5px;
background-clip: padding-box;
margin: 100px auto;
width: 320px;
padding: 35px 35px 15px 35px;
background: #fff;
border: 1px solid #eaeaea;
box-shadow: 0 0 25px #cac6c6;
}
.title {
margin: 0px auto 20px auto;
text-align: center;
color: #505458;
}
</style>
</html>
这里提供了一个受保护的接口，用于获取用户信息，客户端访问这个接口的时候要求登录认证。
UserController.java
package com.louis.spring.oauth.server.controller;
import java.security.Principal;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UserController {
/**
* 资源服务器提供的受保护接口
* @param principal
* @return
*/
@RequestMapping("/user")
public Principal user(Principal principal) {
System.out.println(principal);
return principal;
}
}
客户端实现
添加依赖
主要添加 Spring Security 依赖，另外因为 Spring Boot 2.0 之后代码的合并， 需要添加 spring-security-oauth2-autoconfigure ，才能使用 @EnableOAuth2Sso 注解。
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-oauth-client</artifactId>
<name>spring-oauth-client</name>
<packaging>war</packaging>
<parent>
<groupId>com.louis</groupId>
<artifactId>spring-oauth-parent</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security.oauth.boot</groupId>
<artifactId>spring-security-oauth2-autoconfigure</artifactId>
<version>${oauth-auto.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-springsecurity4</artifactId>
</dependency>
</dependencies>
</project>
启动类
启动类需要添加 RequestContextListener，用于监听HTTP请求事件。
OAuthClientApplication.java
package com.louis.spring.oauth.client;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.web.context.request.RequestContextListener;
@SpringBootApplication
public class OAuthClientApplication extends SpringBootServletInitializer {
@Bean
public RequestContextListener requestContextListener() {
return new RequestContextListener();
}
public static void main(String[] args) {
SpringApplication.run(OAuthClientApplication.class, args);
}
}
安全配置
添加安全配置类，添加 @EnableOAuth2Sso 注解支持单点登录。
OAuthClientSecurityConfig.java
package com.louis.spring.oauth.client.config;
import org.springframework.boot.autoconfigure.security.oauth2.client.EnableOAuth2Sso;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@EnableOAuth2Sso
@Configuration
public class OAuthClientSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
public void configure(HttpSecurity http) throws Exception {
http.csrf().disable()
.antMatcher("/**")
.authorizeRequests()
.antMatchers("/", "/login**")
.permitAll()
.anyRequest()
.authenticated();
}
}
页面配置
添加 Spring MVC 配置，主要是添加 index 和 securedPage 页面对应的访问配置。
OAuthClientWebConfig.java
package com.louis.spring.oauth.client.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.web.servlet.config.annotation.*;
@Configuration
@EnableWebMvc
public class OAuthClientWebConfig implements WebMvcConfigurer {
@Bean
public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
@Override
public void configureDefaultServletHandling(final DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
@Override
public void addViewControllers(final ViewControllerRegistry registry) {
registry.addViewController("/")
.setViewName("forward:/index");
registry.addViewController("/index");
registry.addViewController("/securedPage");
}
@Override
public void addResourceHandlers(final ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**")
.addResourceLocations("/resources/");
}
}
配置文件
主要配置 oauth2 认证相关的配置。
application.yml
auth-server: http://localhost:8881/auth
server:
port: 8882
servlet:
context-path: /
session:
cookie:
name: SESSION1
security:
basic:
enabled: false
oauth2:
client:
clientId: SampleClientId
clientSecret: secret
accessTokenUri: ${auth-server}/oauth/token
userAuthorizationUri: ${auth-server}/oauth/authorize
resource:
userInfoUri: ${auth-server}/user
spring:
thymeleaf:
cache: false
页面文件
页面文件只有两个，index 是首页，无须登录即可访问，在首页通过添加 login 按钮访问 securedPage 页面，securedPage 访问资源服务器的 /user 接口获取用户信息。
/resources/templates/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Spring Security SSO</title>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<div class="col-sm-12">
<h1>Spring Security SSO</h1>
<a class="btn btn-primary" href="securedPage">Login</a>
</div>
</div>
</body>
</html>
/resources/templates/securedPage.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Spring Security SSO</title>
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
</head>
<body>
<div class="container">
<div class="col-sm-12">
<h1>Secured Page</h1>
Welcome, <span th:text="${#authentication.name}">Name</span>
</div>
</div>
</body>
</html>
spring-oauth-client2 内容跟 spring-oauth-client 基本一样，除了端口为 8883 外，securedPage 显示的内容稍微有点不一样用于区分。
测试效果
启动认证服务端和客户端。
访问 http://localhost:8882/，返回结果如下。
点击 login，跳转到 securedPage 页面，页面调用资源服务器的受保护接口 /user ，会跳转到认证服务器的登录界面，要求进行登录认证。
同理，访问 http://localhost:8883/，返回结果如下。
点击 login，同样跳转到认证服务器的登录界面，要求进行登录认证。
输入用户名密码，默认是后台配置的用户信息，用户名：admin， 密码：123 ，点击登录。
从 http://localhost:8882/ 发出的请求登录成功之后返回8882的安全保护页面。
如果是从 http://localhost:8883/ 发出的登录请求，则会跳转到8883的安全保护页面。
从 8882 发出登录请求，登录成功之后，访问 http://localhost:8883/ ，点击登录。
结果不需要再进行登录，直接跳转到了 8883 的安全保护页面，因为在访问 8882 的时候已经登录过了。
同理，假如先访问 8883 资源进行登录之后，访问 8882 也无需重复登录，到此，单点登录的案例实现就完成了。
执行流程剖析
接下来，针对上面的单点登录案例，我们对整个体系的执行流程进行详细的剖析。
在此之前，我们先描述一下OAuth2授权码模式的整个大致流程。
1. 浏览器向UI服务器点击触发要求安全认证
2. 跳转到授权服务器获取授权许可码
3. 从授权服务器带授权许可码跳回来
4. UI服务器向授权服务器获取AccessToken
5. 返回AccessToken到UI服务器
6. 发出/resource请求到UI服务器
7. UI服务器将/resource请求转发到Resource服务器
8. Resource服务器要求安全验证,于是直接从授权服务器获取认证授权信息进行判断后(最后会响应给UI服务器,UI服务器再响应给浏览中器）
结合我们的案例，首先，我们通过 http://localhost:8882/，访问 8882 的首页，8883 同理。
然后点击 Login，重定向到了 http://localhost:8882/securedPage，而 securedPage 是受保护的页面。所以就重定向到了 8882 的登录URL: http://localhost:8882/login, 要求首先进行登录认证。
因为客户端配置了单点登录（@EnableOAuth2Sso），所以单点登录拦截器会读取授权服务器的配置，发起形如： http://localhost:8881/auth/oauth/authorize?client_id=SampleClientId&redirect_uri=http://localhost:8882/ui/login&response_type=code&state=xtDCY2 的授权请求获取授权码。
然后因为上面访问的是认证服务器的资源，所以又重定向到了认证服务器的登录URL: http://localhost:8881/auth/login，也就是我们自定义的统一认证登录平台页面，要求先进行登录认证，然后才能继续发送获取授权码的请求。
我们输入用户名和密码，点击登录按钮进行登录认证。
登录认证的大致流程如下：
AbstractAuthenticationProcessingFilter.doFilter()
默认的登录过滤器 UsernamePasswordAuthenticationFilter 拦截到登录请求，调用父类的 doFilter 的方法。
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
...
Authentication authResult;
try {
authResult = attemptAuthentication(request, response);
if (authResult == null) {
// return immediately as subclass has indicated that it hasn't completed
// authentication
return;
}
sessionStrategy.onAuthentication(authResult, request, response);
}
...
successfulAuthentication(request, response, chain, authResult);
}
UsernamePasswordAuthenticationFilter.attemptAuthentication()
doFilter 方法调用 UsernamePasswordAuthenticationFilter 自身的 attemptAuthentication 方法进行登录认证。
public Authentication attemptAuthentication(HttpServletRequest request,
HttpServletResponse response) throws AuthenticationException {
...
String username = obtainUsername(request);
String password = obtainPassword(request);
UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
// Allow subclasses to set the "details" property
setDetails(request, authRequest);
return this.getAuthenticationManager().authenticate(authRequest);
}
ProviderManager.authenticate()
attemptAuthentication 继续调用认证管理器 ProviderManager 的 authenticate 方法。
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
Class<? extends Authentication> toTest = authentication.getClass();
AuthenticationException lastException = null;
Authentication result = null;
boolean debug = logger.isDebugEnabled();
for (AuthenticationProvider provider : getProviders()) {
if (!provider.supports(toTest)) {
continue;
}try {
result = provider.authenticate(authentication);
if (result != null) {
copyDetails(authentication, result);
break;
}
}
...
}
}
AbstractUserDetailsAuthenticationProvider.authenticate()
而 ProviderManager 又是通过一组 AuthenticationProvider 来完成登录认证的，其中的默认实现是 DaoAuthenticationProvider，继承自 AbstractUserDetailsAuthenticationProvider， 所以 AbstractUserDetailsAuthenticationProvider 的 authenticate 方法被调用。
public Authentication authenticate(Authentication authentication) throws AuthenticationException {// Determine username
String username = (authentication.getPrincipal() == null) ? "NONE_PROVIDED" : authentication.getName();
boolean cacheWasUsed = true;
UserDetails user = this.userCache.getUserFromCache(username);
if (user == null) {
cacheWasUsed = false;
try {
user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);
}
...
}
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user, (UsernamePasswordAuthenticationToken) authentication);
}
...return createSuccessAuthentication(principalToReturn, authentication, user);
}
DaoAuthenticationProvider.retrieveUser()
AbstractUserDetailsAuthenticationProvider 的 authenticate 在认证过程中又调用 DaoAuthenticationProvider 的 retrieveUser 方法获取登录认证所需的用户信息。
protected final UserDetails retrieveUser(String username, UsernamePasswordAuthenticationToken authentication)
throws AuthenticationException {
prepareTimingAttackProtection();
try {
UserDetails loadedUser = this.getUserDetailsService().loadUserByUsername(username);return loadedUser;
}
...
}
UserDetailsManager.loadUserByUsername()
DaoAuthenticationProvider 的 retrieveUser 方法 通过 UserDetailsService 来进一步获取登录认证所需的用户信息。UserDetailsManager 接口继承了 UserDetailsService 接口，框架默认提供了 InMemoryUserDetailsManager 和 JdbcUserDetailsManager 两种用户信息的获取方式，当然 InMemoryUserDetailsManager 主要用于非正式环境，正式环境大多都是采用 JdbcUserDetailsManager，从数据库获取用户信息，当然你也可以根据需要扩展其他的获取方式。
DaoAuthenticationProvider 的大致实现：
@Override
public UserDetails loadUserByUsername(String username)
throws UsernameNotFoundException {
List<UserDetails> users = loadUsersByUsername(username);
UserDetails user = users.get(0); // contains no GrantedAuthority[]
Set<GrantedAuthority> dbAuthsSet = new HashSet<>();
...
List<GrantedAuthority> dbAuths = new ArrayList<>(dbAuthsSet);
addCustomAuthorities(user.getUsername(), dbAuths);return createUserDetails(username, user, dbAuths);
}
InMemoryUserDetailsManager 的大致实现：
public UserDetails loadUserByUsername(String username)
throws UsernameNotFoundException {
UserDetails user = users.get(username.toLowerCase());
if (user == null) {
throw new UsernameNotFoundException(username);
}
return new User(user.getUsername(), user.getPassword(), user.isEnabled(),
user.isAccountNonExpired(), user.isCredentialsNonExpired(),
user.isAccountNonLocked(), user.getAuthorities());
}
DaoAuthenticationProvider.additionalAuthenticationChecks()
获取到用户认证所需的信息之后，认证器会进行一些检查譬如 preAuthenticationChecks 进行账号状态之类的前置检查，然后调用 DaoAuthenticationProvider 的 additionalAuthenticationChecks 方法验证密码合法性。
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
// Determine username
String username = (authentication.getPrincipal() == null) ? "NONE_PROVIDED" : authentication.getName();
boolean cacheWasUsed = true;
UserDetails user = this.userCache.getUserFromCache(username);
if (user == null) {
cacheWasUsed = false;
try {
user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);
}
...
}
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user, (UsernamePasswordAuthenticationToken) authentication);
}
...
return createSuccessAuthentication(principalToReturn, authentication, user);
}
AbstractUserDetailsAuthenticationProvider.createSuccessAuthentication()
登录认证成功之后， AbstractUserDetailsAuthenticationProvider 的 createSuccessAuthentication 方法被调用， 返回一个 UsernamePasswordAuthenticationToken 对象。
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
// Determine username
String username = (authentication.getPrincipal() == null) ? "NONE_PROVIDED" : authentication.getName();
boolean cacheWasUsed = true;
UserDetails user = this.userCache.getUserFromCache(username);
if (user == null) {
cacheWasUsed = false;
try {
user = retrieveUser(username, (UsernamePasswordAuthenticationToken) authentication);
}
...
}
try {
preAuthenticationChecks.check(user);
additionalAuthenticationChecks(user, (UsernamePasswordAuthenticationToken) authentication);
}
...
return createSuccessAuthentication(principalToReturn, authentication, user);
}
AbstractAuthenticationProcessingFilter.successfulAuthentication()
认证成功之后，继续回到 AbstractAuthenticationProcessingFilter，执行 successfulAuthentication 方法，存放认证信息到上下文，最终决定登录认证成功之后的操作。
protected void successfulAuthentication(HttpServletRequest request,
HttpServletResponse response, FilterChain chain, Authentication authResult)
throws IOException, ServletException {
// 将登录认证信息放置到上下文，在授权阶段从上下文获取
SecurityContextHolder.getContext().setAuthentication(authResult);
rememberMeServices.loginSuccess(request, response, authResult);
// Fire event
if (this.eventPublisher != null) {
eventPublisher.publishEvent(new InteractiveAuthenticationSuccessEvent(
authResult, this.getClass()));
}
successHandler.onAuthenticationSuccess(request, response, authResult);
}
SavedRequestAwareAuthenticationSuccessHandler.onAuthenticationSuccess()
登录成功之后，调用 SavedRequestAwareAuthenticationSuccessHandler 的 onAuthenticationSuccess 方法，最后根据配置再次发送授权请求 ：
http://localhost:8881/auth/oauth/authorize?client_id=SampleClientId&redirect_uri=http://localhost:8882/login&response_type=code&state=xtDCY2
AuthorizationEndpoint.authorize()
根据路径匹配 /oauth/authorize，AuthorizationEndpoint 的 authorize 接口被调用。
@RequestMapping(value = "/oauth/authorize")
public ModelAndView authorize(Map<String, Object> model, @RequestParam Map<String, String> parameters,
SessionStatus sessionStatus, Principal principal) {
AuthorizationRequest authorizationRequest = getOAuth2RequestFactory().createAuthorizationRequest(parameters);
Set<String> responseTypes = authorizationRequest.getResponseTypes();try {
ClientDetails client = getClientDetailsService().loadClientByClientId(authorizationRequest.getClientId());
// The resolved redirect URI is either the redirect_uri from the parameters or the one from
// clientDetails. Either way we need to store it on the AuthorizationRequest.
String redirectUriParameter = authorizationRequest.getRequestParameters().get(OAuth2Utils.REDIRECT_URI);
String resolvedRedirect = redirectResolver.resolveRedirect(redirectUriParameter, client);
authorizationRequest.setRedirectUri(resolvedRedirect);
// We intentionally only validate the parameters requested by the client (ignoring any data that may have
// been added to the request by the manager).
oauth2RequestValidator.validateScope(authorizationRequest, client);
// Some systems may allow for approval decisions to be remembered or approved by default. Check for
// such logic here, and set the approved flag on the authorization request accordingly.
authorizationRequest = userApprovalHandler.checkForPreApproval(authorizationRequest, (Authentication) principal);
// TODO: is this call necessary?
boolean approved = userApprovalHandler.isApproved(authorizationRequest, (Authentication) principal);
authorizationRequest.setApproved(approved);
// Validation is all done, so we can check for auto approval...
if (authorizationRequest.isApproved()) {
if (responseTypes.contains("token")) {
return getImplicitGrantResponse(authorizationRequest);
}
if (responseTypes.contains("code")) {
return new ModelAndView(getAuthorizationCodeResponse(authorizationRequest,
(Authentication) principal));
}
}
// Store authorizationRequest AND an immutable Map of authorizationRequest in session
// which will be used to validate against in approveOrDeny()
model.put(AUTHORIZATION_REQUEST_ATTR_NAME, authorizationRequest);
model.put(ORIGINAL_AUTHORIZATION_REQUEST_ATTR_NAME, unmodifiableMap(authorizationRequest));
return getUserApprovalPageResponse(model, authorizationRequest, (Authentication) principal);
}
}
DefaultOAuth2RequestFactory.createAuthorizationRequest()
DefaultOAuth2RequestFactory 的 createAuthorizationRequest 方法被调用，用来创建 AuthorizationRequest。
public AuthorizationRequest createAuthorizationRequest(Map<String, String> authorizationParameters) {
// 构造 AuthorizationRequest
String clientId = authorizationParameters.get(OAuth2Utils.CLIENT_ID);
String state = authorizationParameters.get(OAuth2Utils.STATE);
String redirectUri = authorizationParameters.get(OAuth2Utils.REDIRECT_URI);
Set<String> responseTypes = OAuth2Utils.parseParameterList(authorizationParameters.get(OAuth2Utils.RESPONSE_TYPE));
Set<String> scopes = extractScopes(authorizationParameters, clientId);
AuthorizationRequest request = new AuthorizationRequest(authorizationParameters,
Collections.<String, String> emptyMap(), clientId, scopes, null, null, false, state, redirectUri, responseTypes);
// 通过 ClientDetailsService 加载 ClientDetails
ClientDetails clientDetails = clientDetailsService.loadClientByClientId(clientId);
request.setResourceIdsAndAuthoritiesFromClientDetails(clientDetails);
return request;
}
ClientDetailsService.loadClientByClientId()
ClientDetailsService 的 loadClientByClientId 方法被调用，框架提供了 ClientDetailsService 的两种实现 InMemoryClientDetailsService 和 JdbcClientDetailsService，分别对应从内存获取和从数据库获取，当然你也可以根据需要定制其他获取方式。
JdbcClientDetailsService 的大致实现，主要是通过 JdbcTemplate 获取，需要设置一个 datasource。
public ClientDetails loadClientByClientId(String clientId) throws InvalidClientException {
ClientDetails details;
try {
details = jdbcTemplate.queryForObject(selectClientDetailsSql, new ClientDetailsRowMapper(), clientId);
}
catch (EmptyResultDataAccessException e) {
throw new NoSuchClientException("No client with requested id: " + clientId);
}
return details;
}
InMemoryClientDetailsService 的大致实现，主要是从内存Store里面取出信息。
public ClientDetails loadClientByClientId(String clientId) throws ClientRegistrationException {
ClientDetails details = clientDetailsStore.get(clientId);
if (details == null) {
throw new NoSuchClientException("No client with requested id: " + clientId);
}
return details;
}
AuthorizationEndpoint.authorize()
继续回到 AuthorizationEndpoint 的 authorize 方法
@RequestMapping(value = "/oauth/authorize")
public ModelAndView authorize(Map<String, Object> model, @RequestParam Map<String, String> parameters,
SessionStatus sessionStatus, Principal principal) {
AuthorizationRequest authorizationRequest = getOAuth2RequestFactory().createAuthorizationRequest(parameters);
Set<String> responseTypes = authorizationRequest.getResponseTypes();try {
// 创建ClientDtails
ClientDetails client = getClientDetailsService().loadClientByClientId(authorizationRequest.getClientId());
// The resolved redirect URI is either the redirect_uri from the parameters or the one from
// 设置跳转URL
String redirectUriParameter = authorizationRequest.getRequestParameters().get(OAuth2Utils.REDIRECT_URI);
String resolvedRedirect = redirectResolver.resolveRedirect(redirectUriParameter, client);
authorizationRequest.setRedirectUri(resolvedRedirect);
// 验证授权范围
oauth2RequestValidator.validateScope(authorizationRequest, client);
// 检查是否是自动完成授权还是转到授权页面让用户手动确认
authorizationRequest = userApprovalHandler.checkForPreApproval(authorizationRequest, (Authentication) principal);
// TODO: is this call necessary?
boolean approved = userApprovalHandler.isApproved(authorizationRequest, (Authentication) principal);
authorizationRequest.setApproved(approved);
// Validation is all done, so we can check for auto approval...
if (authorizationRequest.isApproved()) {
if (responseTypes.contains("token")) {
return getImplicitGrantResponse(authorizationRequest);
}
if (responseTypes.contains("code")) {
// 如果是授权码模式，且为自动授权或已完成授权，直接返回授权结果
return new ModelAndView(getAuthorizationCodeResponse(authorizationRequest, (Authentication) principal));
}
}
// Store authorizationRequest AND an immutable Map of authorizationRequest in session
// which will be used to validate against in approveOrDeny()
model.put(AUTHORIZATION_REQUEST_ATTR_NAME, authorizationRequest);
model.put(ORIGINAL_AUTHORIZATION_REQUEST_ATTR_NAME, unmodifiableMap(authorizationRequest));
return getUserApprovalPageResponse(model, authorizationRequest, (Authentication) principal);
}
}
如果是需要手动授权，转到授权页面URL: /oauth/confirm_access 。
private ModelAndView getUserApprovalPageResponse(Map<String, Object> model,
AuthorizationRequest authorizationRequest, Authentication principal) {
if (logger.isDebugEnabled()) {
logger.debug("Loading user approval page: " + userApprovalPage);
}
model.putAll(userApprovalHandler.getUserApprovalRequest(authorizationRequest, principal));
// 转到授权页面， URL /oauth/confirm_access
return new ModelAndView(userApprovalPage, model);
}
用户手动授权页面
AuthorizationEndpoint.approveOrDeny()
AuthorizationEndpoint 中 POST 请求的接口 /oauth/authorize 对应的 approveOrDeny 方法被调用 。
@RequestMapping(value = "/oauth/authorize", method = RequestMethod.POST, params = OAuth2Utils.USER_OAUTH_APPROVAL)
public View approveOrDeny(@RequestParam Map<String, String> approvalParameters, Map<String, ?> model,
SessionStatus sessionStatus, Principal principal) {
AuthorizationRequest authorizationRequest = (AuthorizationRequest) model.get(AUTHORIZATION_REQUEST_ATTR_NAME);
try {
Set<String> responseTypes = authorizationRequest.getResponseTypes();
authorizationRequest.setApprovalParameters(approvalParameters);
authorizationRequest = userApprovalHandler.updateAfterApproval(authorizationRequest, (Authentication) principal);
boolean approved = userApprovalHandler.isApproved(authorizationRequest, (Authentication) principal);
authorizationRequest.setApproved(approved);
if (!authorizationRequest.isApproved()) {
// 用户不许授权，拒绝访问
return new RedirectView(getUnsuccessfulRedirect(authorizationRequest,
new UserDeniedAuthorizationException("User denied access"), responseTypes.contains("token")),
false, true, false);
}
// 用户授权完成，跳转到客户端设定的重定向URL
return getAuthorizationCodeResponse(authorizationRequest, (Authentication) principal);
}
}
用户授权完成，跳转到客户端设定的重定向URL。
BasicAuthenticationFilter.doFilterInternal()
转到客户端重定向URL之后，BasicAuthenticationFilter 拦截到请求， doFilterInternal 方法被调用，携带信息在客户端执行登录认证。
@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
throws IOException, ServletException {
String header = request.getHeader("Authorization");
try {
String[] tokens = extractAndDecodeHeader(header, request);
assert tokens.length == 2;
String username = tokens[0];
if (authenticationIsRequired(username)) {
UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, tokens[1]);
authRequest.setDetails(this.authenticationDetailsSource.buildDetails(request));
Authentication authResult = this.authenticationManager.authenticate(authRequest);
SecurityContextHolder.getContext().setAuthentication(authResult);
this.rememberMeServices.loginSuccess(request, response, authResult);
onSuccessfulAuthentication(request, response, authResult);
}
}
chain.doFilter(request, response);
}
如上面代码显示，doFilterInternal 方法中客户端登录认证逻辑也走了一遍，详细过程跟上面授权服务端的认证过程一般无二，这里就不贴重复代码，大致流程如下链接流所示：
ProviderManager.authenticate() -- > AbstractUserDetailsAuthenticationProvider.authenticate() --> DaoAuthenticationProvider.retrieveUser() --> ClientDetailsUserDetailsService.loadUserByUsername() --> AbstractUserDetailsAuthenticationProvider.createSuccessAuthentication()
TokenEndpoint.postAccessToken()
认证成功之后，客户端获取了权限凭证，返回客户端URL，被 OAuth2ClientAuthenticationProcessingFilter 拦截，然后携带授权凭证向授权服务器发起形如： http://localhost:8881/auth/oauth/token 的 Post 请求换取访问 token，对应的是授权服务器的 TokenEndpoint 类的 postAccessToken 方法。
@RequestMapping(value = "/oauth/token", method=RequestMethod.POST)
public ResponseEntity<OAuth2AccessToken> postAccessToken(Principal principal, @RequestParam
Map<String, String> parameters) throws HttpRequestMethodNotSupportedException {
// 获取之前的请求信息，并对token获取请求信息进行校验
String clientId = getClientId(principal);
ClientDetails authenticatedClient = getClientDetailsService().loadClientByClientId(clientId);
TokenRequest tokenRequest = getOAuth2RequestFactory().createTokenRequest(parameters, authenticatedClient);if (authenticatedClient != null) {
oAuth2RequestValidator.validateScope(tokenRequest, authenticatedClient);
}
if (!StringUtils.hasText(tokenRequest.getGrantType())) {
throw new InvalidRequestException("Missing grant type");
}
if (tokenRequest.getGrantType().equals("implicit")) {
throw new InvalidGrantException("Implicit grant type not supported from token endpoint");
}
...
// 生成 token 并返回给客户端，客户端就可携带此 token 向资源服务器获取信息了
OAuth2AccessToken token = getTokenGranter().grant(tokenRequest.getGrantType(), tokenRequest);return getResponse(token);
}
TokenGranter.grant()
令牌的生成通过 TokenGranter 的 grant 方法来完成。根据授权方式的类型，分别有对应的 TokenGranter 实现，如我们使用的授权码模式，对应的是 AuthorizationCodeTokenGranter。
AbstractTokenGranter.grant()
AuthorizationCodeTokenGranter 的父类 AbstractTokenGranter 的 grant 方法被调用。
public OAuth2AccessToken grant(String grantType, TokenRequest tokenRequest) {
if (!this.grantType.equals(grantType)) {
return null;
}
String clientId = tokenRequest.getClientId();
ClientDetails client = clientDetailsService.loadClientByClientId(clientId);
validateGrantType(grantType, client);
if (logger.isDebugEnabled()) {
logger.debug("Getting access token for: " + clientId);
}
return getAccessToken(client, tokenRequest);
}
protected OAuth2AccessToken getAccessToken(ClientDetails client, TokenRequest tokenRequest) {
return tokenServices.createAccessToken(getOAuth2Authentication(client, tokenRequest));
}
DefaultTokenServices.createAccessToken()
DefaultTokenServices 的 createAccessToken 被调用，用来生成 token。
@Transactional
public OAuth2AccessToken createAccessToken(OAuth2Authentication authentication) throws AuthenticationException {
// 先从 Store 获取，Sotre 类型有 InMemoryTokenStore、JdbcTokenStore、JwtTokenStore、RedisTokenStore 等
OAuth2AccessToken existingAccessToken = tokenStore.getAccessToken(authentication);
OAuth2RefreshToken refreshToken = null;
if (existingAccessToken != null) {
if (existingAccessToken.isExpired()) {
if (existingAccessToken.getRefreshToken() != null) {
refreshToken = existingAccessToken.getRefreshToken();
// The token store could remove the refresh token when the
// access token is removed, but we want to be sure...
tokenStore.removeRefreshToken(refreshToken);
}
tokenStore.removeAccessToken(existingAccessToken);
}
else {
// Re-store the access token in case the authentication has changed
tokenStore.storeAccessToken(existingAccessToken, authentication);
return existingAccessToken;
}
}
// Only create a new refresh token if there wasn't an existing one associated with an expired access token.
// Clients might be holding existing refresh tokens, so we re-use it in the case that the old access token expired.
if (refreshToken == null) {
refreshToken = createRefreshToken(authentication);
}
// But the refresh token itself might need to be re-issued if it has expired.
else if (refreshToken instanceof ExpiringOAuth2RefreshToken) {
ExpiringOAuth2RefreshToken expiring = (ExpiringOAuth2RefreshToken) refreshToken;
if (System.currentTimeMillis() > expiring.getExpiration().getTime()) {
refreshToken = createRefreshToken(authentication);
}
}
OAuth2AccessToken accessToken = createAccessToken(authentication, refreshToken);
tokenStore.storeAccessToken(accessToken, authentication);
// In case it was modified
refreshToken = accessToken.getRefreshToken();
if (refreshToken != null) {
tokenStore.storeRefreshToken(refreshToken, authentication);
}
return accessToken;
}
private OAuth2AccessToken createAccessToken(OAuth2Authentication authentication, OAuth2RefreshToken refreshToken) {
DefaultOAuth2AccessToken token = new DefaultOAuth2AccessToken(UUID.randomUUID().toString());
int validitySeconds = getAccessTokenValiditySeconds(authentication.getOAuth2Request());
if (validitySeconds > 0) {
token.setExpiration(new Date(System.currentTimeMillis() + (validitySeconds * 1000L)));
}
token.setRefreshToken(refreshToken);
token.setScope(authentication.getOAuth2Request().getScope());
return accessTokenEnhancer != null ? accessTokenEnhancer.enhance(token, authentication) : token;
}
客户端携带Token访问资源
token 被生成后返回给了客户端，客户端携带此 token 发起形如： http://localhost:8881/auth/user 的请求获取用户信息。
OAuth2AuthenticationProcessingFilter 过滤器拦截请求，然后调用 OAuth2AuthenticationManager 的 authenticate 方法执行登录流程。
OAuth2AuthenticationProcessingFilter.doFilter()
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException,
ServletException {
final boolean debug = logger.isDebugEnabled();
final HttpServletRequest request = (HttpServletRequest) req;
final HttpServletResponse response = (HttpServletResponse) res;
try {
// 获取并校验 token 之后，然后携带 token 进行登录
Authentication authentication = tokenExtractor.extract(request);
...
else {
request.setAttribute(OAuth2AuthenticationDetails.ACCESS_TOKEN_VALUE, authentication.getPrincipal());
if (authentication instanceof AbstractAuthenticationToken) {
AbstractAuthenticationToken needsDetails = (AbstractAuthenticationToken) authentication;
needsDetails.setDetails(authenticationDetailsSource.buildDetails(request));
}
Authentication authResult = authenticationManager.authenticate(authentication);
if (debug) {
logger.debug("Authentication success: " + authResult);
}
eventPublisher.publishAuthenticationSuccess(authResult);
SecurityContextHolder.getContext().setAuthentication(authResult);
}
}
chain.doFilter(request, response);
}
OAuth2AuthenticationManager.authenticate()
OAuth2AuthenticationManager 的 authenticate 方法被调用，利用 token 执行登录认证。
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
if (authentication == null) {
throw new InvalidTokenException("Invalid token (token not found)");
}
String token = (String) authentication.getPrincipal();
OAuth2Authentication auth = tokenServices.loadAuthentication(token);
if (auth == null) {
throw new InvalidTokenException("Invalid token: " + token);
}
Collection<String> resourceIds = auth.getOAuth2Request().getResourceIds();
if (resourceId != null && resourceIds != null && !resourceIds.isEmpty() && !resourceIds.contains(resourceId)) {
throw new OAuth2AccessDeniedException("Invalid token does not contain resource id (" + resourceId + ")");
}
checkClientDetails(auth);
if (authentication.getDetails() instanceof OAuth2AuthenticationDetails) {
OAuth2AuthenticationDetails details = (OAuth2AuthenticationDetails) authentication.getDetails();
// Guard against a cached copy of the same details
if (!details.equals(auth.getDetails())) {
// Preserve the authentication details from the one loaded by token services
details.setDecodedDetails(auth.getDetails());
}
}
auth.setDetails(authentication.getDetails());
auth.setAuthenticated(true);
return auth;
}
认证成功之后，获取目标接口数据，然后重定向了真正的访问目标URL http://localhost:8882/securedPage，并信息获取的数据信息。
访问 http://localhost:8882/securedPage，返回结果如下：
访问 http://localhost:8883/securedPage，返回结果如下：
另外，在客户端访问受保护的资源的时候，会被 OAuth2ClientAuthenticationProcessingFilter 过滤器拦截。
OAuth2ClientAuthenticationProcessingFilter 的主要作用是获取 token 进行登录认证。
此时可能会出现以下几种情况：
1. 获取不到之前保存的 token，或者 token 已经过期，此时会继续判断请求中是否携带从认证服务器获取的授权码。
2. 如果请求中也没有认证服务器提供的授权码，则会重定向到认证服务器的 /oauth/authorize，要求获取授权码。
3. 访问认证服务器的授权请求URL /oauth/authorize 时，会重定向到认证服务器的统一认证登录页面，要求进行登录。
4. 如果步骤2中，请求已经携带授权码，则携带授权码向认证服务器发起 /oauth/token 请求，申请分配访问 token。
5. 使用之前保存的或者通过上面步骤重新获取的 token 进行登录认证，登录成功返回一个 OAuth2Authentication 对象。
OAuth2ClientAuthenticationProcessingFilter.attemptAuthentication()
访问请求被过滤器 OAuth2ClientAuthenticationProcessingFilter 拦截，它继承了 AbstractAuthenticationProcessingFilter，过滤器 AbstractAuthenticationProcessingFilter 的doFilter 方法被调用，其中OAuth2ClientAuthenticationProcessingFilter 的 attemptAuthentication 被调用进行登录认证。
@Override
public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response)
throws AuthenticationException, IOException, ServletException {
OAuth2AccessToken accessToken;
try {
accessToken = restTemplate.getAccessToken();
} catch (OAuth2Exception e) {
BadCredentialsException bad = new BadCredentialsException("Could not obtain access token", e);
publish(new OAuth2AuthenticationFailureEvent(bad));
throw bad;
}
try {
OAuth2Authentication result = tokenServices.loadAuthentication(accessToken.getValue());
if (authenticationDetailsSource!=null) {
request.setAttribute(OAuth2AuthenticationDetails.ACCESS_TOKEN_VALUE, accessToken.getValue());
request.setAttribute(OAuth2AuthenticationDetails.ACCESS_TOKEN_TYPE, accessToken.getTokenType());
result.setDetails(authenticationDetailsSource.buildDetails(request));
}
publish(new AuthenticationSuccessEvent(result));
return result;
}
catch (InvalidTokenException e) {
BadCredentialsException bad = new BadCredentialsException("Could not obtain user details from token", e);
publish(new OAuth2AuthenticationFailureEvent(bad));
throw bad;
}
}
OAuth2RestTemplate.getAccessToken()
OAuth2RestTemplate 的 getAccessToken 方法被调用，用来获取访问 token.
public OAuth2AccessToken getAccessToken() throws UserRedirectRequiredException {
OAuth2AccessToken accessToken = context.getAccessToken();
if (accessToken == null || accessToken.isExpired()) {
try {
accessToken = acquireAccessToken(context);
}
catch (UserRedirectRequiredException e) {
...
}
}
return accessToken;
}
AuthorizationCodeAccessTokenProvider.obtainAccessToken()
接下来 AuthorizationCodeAccessTokenProvider 的 obtainAccessToken 方法被调用。
public OAuth2AccessToken obtainAccessToken(OAuth2ProtectedResourceDetails details, AccessTokenRequest request)
throws UserRedirectRequiredException, UserApprovalRequiredException, AccessDeniedException,
OAuth2AccessDeniedException {
AuthorizationCodeResourceDetails resource = (AuthorizationCodeResourceDetails) details;
if (request.getAuthorizationCode() == null) {
if (request.getStateKey() == null) {
// 如果没有携带权限凭证，则转到授权URL，又因为未登录，所以转到授权服务器登录界面
throw getRedirectForAuthorization(resource, request);
}
obtainAuthorizationCode(resource, request);
}
// 继续调用父类的方法获取 token
return retrieveToken(request, resource, getParametersForTokenRequest(resource, request),
getHeadersForTokenRequest(request));
}
授权前流程
如果还没有进行授权，就没有携带权限凭证，则转到授权URL，又因为未登录，所以转到授权服务器登录界面。
授权后流程
如果是授权成功之后，就可以使用携带的授权凭证换取访问 token 了。
OAuth2AccessTokenSupport.retrieveToken()
AuthorizationCodeAccessTokenProvider 通过调用父类 OAuth2AccessTokenSupport 的 retrieveToken 方法进一步获取。
protected OAuth2AccessToken retrieveToken(AccessTokenRequest request, OAuth2ProtectedResourceDetails resource,
MultiValueMap<String, String> form, HttpHeaders headers) throws OAuth2AccessDeniedException {
try {
// Prepare headers and form before going into rest template call in case the URI is affected by the result
authenticationHandler.authenticateTokenRequest(resource, form, headers);
// Opportunity to customize form and headers
tokenRequestEnhancer.enhance(request, resource, form, headers);
final AccessTokenRequest copy = request;
final ResponseExtractor<OAuth2AccessToken> delegate = getResponseExtractor();
ResponseExtractor<OAuth2AccessToken> extractor = new ResponseExtractor<OAuth2AccessToken>() {
@Override
public OAuth2AccessToken extractData(ClientHttpResponse response) throws IOException {
if (response.getHeaders().containsKey("Set-Cookie")) {
copy.setCookie(response.getHeaders().getFirst("Set-Cookie"));
}
return delegate.extractData(response);
}
};
return getRestTemplate().execute(getAccessTokenUri(resource, form), getHttpMethod(),
getRequestCallback(resource, form, headers), extractor , form.toSingleValueMap());
}
}
携带授权凭证访问授权服务器的授权连接 http://localhost:8881/auth/oauth/token，以换取资源访问 token，后续客户端携带 token 访问资源服务器。
TokenEndpoint.postAccessToken()
TokenEndpoint 中授权服务器的 token 获取接口定义。
获取到 token 返回给客户端之后，客户就可以使用 token 向资源服务器获取资源了。
源码下载
码云：https://gitee.com/liuge1988/spring-boot-demo.git