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我扒了半天源码,终于找到了Oauth2自定义处理结果的最佳方案!
在《微服务权限终极解决方案,Spring Cloud Gateway + Oauth2 实现统一认证和鉴权!》一文中我们介绍了Oauth2在微服务中的使用,但是我们没有自定义Oauth2默认的处理结果。有时候我们真的很希望Oauth2中的认证授权能返回我们指定格式的结果,比如登录认证的结果、网关鉴权不通过的结果等等。本文将详细介绍Oauth2中自定义处理结果的方案,希望对大家有所帮助!
解决什么问题
自定义Oauth2处理结果,主要是为了统一接口返回信息的格式,从下面几个方面着手。
自定义Oauth2登录认证成功和失败的返回结果; JWT令牌过期或者签名不正确,网关认证失败的返回结果; 携带过期或者签名不正确的JWT令牌访问白名单接口,网关直接认证失败。
自定义登录认证结果
认证成功返回结果
我们先来看看默认的返回结果,访问Oauth2登录认证接口:http://localhost:9201/auth/oauth/token
我们之前使用的都是统一的通用返回结果 CommonResult
,Oauth2的这个结果显然不符合,需要统一下,通用返回结果格式如下;
/**
* 通用返回对象
* Created by macro on 2019/4/19.
*/
public class CommonResult<T> {
private long code;
private String message;
private T data;
}
其实我们只要找到一个关键类就可以自定义Oauth2的登录认证接口了,它就是 org.springframework.security.oauth2.provider.endpoint.TokenEndpoint
,其中定义了我们非常熟悉的登录认证接口,我们只要自己重写登录认证接口,直接调用默认的实现逻辑,然后把默认返回的结果处理下即可,下面是默认的实现逻辑;
@FrameworkEndpoint
public class TokenEndpoint extends AbstractEndpoint {
@RequestMapping(value = "/oauth/token", method=RequestMethod.POST)
public ResponseEntity<OAuth2AccessToken> postAccessToken(Principal principal, @RequestParam
Map<String, String> parameters) throws HttpRequestMethodNotSupportedException {
if (!(principal instanceof Authentication)) {
throw new InsufficientAuthenticationException(
"There is no client authentication. Try adding an appropriate authentication filter.");
}
String clientId = getClientId(principal);
ClientDetails authenticatedClient = getClientDetailsService().loadClientByClientId(clientId);
TokenRequest tokenRequest = getOAuth2RequestFactory().createTokenRequest(parameters, authenticatedClient);
if (clientId != null && !clientId.equals("")) {
// Only validate the client details if a client authenticated during this
// request.
if (!clientId.equals(tokenRequest.getClientId())) {
// double check to make sure that the client ID in the token request is the same as that in the
// authenticated client
throw new InvalidClientException("Given client ID does not match authenticated client");
}
}
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");
}
if (isAuthCodeRequest(parameters)) {
// The scope was requested or determined during the authorization step
if (!tokenRequest.getScope().isEmpty()) {
logger.debug("Clearing scope of incoming token request");
tokenRequest.setScope(Collections.<String> emptySet());
}
}
if (isRefreshTokenRequest(parameters)) {
// A refresh token has its own default scopes, so we should ignore any added by the factory here.
tokenRequest.setScope(OAuth2Utils.parseParameterList(parameters.get(OAuth2Utils.SCOPE)));
}
OAuth2AccessToken token = getTokenGranter().grant(tokenRequest.getGrantType(), tokenRequest);
if (token == null) {
throw new UnsupportedGrantTypeException("Unsupported grant type: " + tokenRequest.getGrantType());
}
return getResponse(token);
}
}
我们将需要的JWT信息封装成对象,然后放入到我们的通用返回结果的 data
属性中去;
/**
* Oauth2获取Token返回信息封装
* Created by macro on 2020/7/17.
*/
@Data
@EqualsAndHashCode(callSuper = false)
@Builder
public class Oauth2TokenDto {
/**
* 访问令牌
*/
private String token;
/**
* 刷新令牌
*/
private String refreshToken;
/**
* 访问令牌头前缀
*/
private String tokenHead;
/**
* 有效时间(秒)
*/
private int expiresIn;
}
创建一个 AuthController
,自定义实现Oauth2默认的登录认证接口;
/**
* 自定义Oauth2获取令牌接口
* Created by macro on 2020/7/17.
*/
@RestController
@RequestMapping("/oauth")
public class AuthController {
@Autowired
private TokenEndpoint tokenEndpoint;
/**
* Oauth2登录认证
*/
@RequestMapping(value = "/token", method = RequestMethod.POST)
public CommonResult<Oauth2TokenDto> postAccessToken(Principal principal, @RequestParam Map<String, String> parameters) throws HttpRequestMethodNotSupportedException {
OAuth2AccessToken oAuth2AccessToken = tokenEndpoint.postAccessToken(principal, parameters).getBody();
Oauth2TokenDto oauth2TokenDto = Oauth2TokenDto.builder()
.token(oAuth2AccessToken.getValue())
.refreshToken(oAuth2AccessToken.getRefreshToken().getValue())
.expiresIn(oAuth2AccessToken.getExpiresIn())
.tokenHead("Bearer ").build();
return CommonResult.success(oauth2TokenDto);
}
}
再次调用登录认证接口,我们可以发现返回结果已经变成了符合我们通用返回结果的格式了!
认证失败返回结果
认证成功的结果统一了,认证失败的结果我们也得统一下吧,先来看下原来认证失败的结果;
我们仔细查看下登录认证的默认实现可以发现,很多认证失败的操作都会直接抛出 OAuth2Exception
异常,对于在Controller
中抛出的异常,我们可以使用@ControllerAdvice
注解来进行全局处理;
/**
* 全局处理Oauth2抛出的异常
* Created by macro on 2020/7/17.
*/
@ControllerAdvice
public class Oauth2ExceptionHandler {
@ResponseBody
@ExceptionHandler(value = OAuth2Exception.class)
public CommonResult handleOauth2(OAuth2Exception e) {
return CommonResult.failed(e.getMessage());
}
}
当我们输错密码,再次调用登录认证接口时,发现认证失败的结果也统一了。
自定义网关鉴权失败结果
当我们使用过期或签名不正确的JWT令牌访问需要权限的接口时,会直接返回状态码 401
;
这个返回结果不符合我们的通用结果格式,其实我们想要的是返回状态码为 200
,然后返回如下格式信息;
{
"code": 401,
"data": "Jwt expired at 2020-07-10T08:38:40Z",
"message": "暂未登录或token已经过期"
}
这里有个非常简单的改法,只需添加一行代码,修改网关的安全配置 ResourceServerConfig
,设置好资源服务器的ServerAuthenticationEntryPoint
即可;
/**
* 资源服务器配置
* Created by macro on 2020/6/19.
*/
@AllArgsConstructor
@Configuration
@EnableWebFluxSecurity
public class ResourceServerConfig {
private final AuthorizationManager authorizationManager;
private final IgnoreUrlsConfig ignoreUrlsConfig;
private final RestfulAccessDeniedHandler restfulAccessDeniedHandler;
private final RestAuthenticationEntryPoint restAuthenticationEntryPoint;
@Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http.oauth2ResourceServer().jwt()
.jwtAuthenticationConverter(jwtAuthenticationConverter());
//自定义处理JWT请求头过期或签名错误的结果(新添加的)
http.oauth2ResourceServer().authenticationEntryPoint(restAuthenticationEntryPoint);
http.authorizeExchange()
.pathMatchers(ArrayUtil.toArray(ignoreUrlsConfig.getUrls(),String.class)).permitAll()//白名单配置
.anyExchange().access(authorizationManager)//鉴权管理器配置
.and().exceptionHandling()
.accessDeniedHandler(restfulAccessDeniedHandler)//处理未授权
.authenticationEntryPoint(restAuthenticationEntryPoint)//处理未认证
.and().csrf().disable();
return http.build();
}
}
添加完成后,再次访问需要权限的接口,就会返回我们想要的结果了。
兼容白名单接口
其实对于白名单接口一直有个问题,当携带过期或签名不正确的JWT令牌访问时,会直接返回token过期的结果,我们可以访问下登录认证接口试试;
明明就是个白名单接口,只不过携带的token不对就不让访问了,显然有点不合理。如何解决呢,我们先看看不带token访问怎么样;
其实我们只要在Oauth2默认的认证过滤器前面再加个过滤器,如果是白名单接口,直接移除认证头即可,首先定义好我们的过滤器;
/**
* 白名单路径访问时需要移除JWT请求头
* Created by macro on 2020/7/24.
*/
@Component
public class IgnoreUrlsRemoveJwtFilter implements WebFilter {
@Autowired
private IgnoreUrlsConfig ignoreUrlsConfig;
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
ServerHttpRequest request = exchange.getRequest();
URI uri = request.getURI();
PathMatcher pathMatcher = new AntPathMatcher();
//白名单路径移除JWT请求头
List<String> ignoreUrls = ignoreUrlsConfig.getUrls();
for (String ignoreUrl : ignoreUrls) {
if (pathMatcher.match(ignoreUrl, uri.getPath())) {
request = exchange.getRequest().mutate().header("Authorization", "").build();
exchange = exchange.mutate().request(request).build();
return chain.filter(exchange);
}
}
return chain.filter(exchange);
}
}
然后把这个过滤器配置到默认的认证过滤器之前即可,在ResourceServerConfig中进行配置;
/**
* 资源服务器配置
* Created by macro on 2020/6/19.
*/
@AllArgsConstructor
@Configuration
@EnableWebFluxSecurity
public class ResourceServerConfig {
private final AuthorizationManager authorizationManager;
private final IgnoreUrlsConfig ignoreUrlsConfig;
private final RestfulAccessDeniedHandler restfulAccessDeniedHandler;
private final RestAuthenticationEntryPoint restAuthenticationEntryPoint;
private final IgnoreUrlsRemoveJwtFilter ignoreUrlsRemoveJwtFilter;
@Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http.oauth2ResourceServer().jwt()
.jwtAuthenticationConverter(jwtAuthenticationConverter());
//自定义处理JWT请求头过期或签名错误的结果
http.oauth2ResourceServer().authenticationEntryPoint(restAuthenticationEntryPoint);
//对白名单路径,直接移除JWT请求头(新添加的)
http.addFilterBefore(ignoreUrlsRemoveJwtFilter, SecurityWebFiltersOrder.AUTHENTICATION);
http.authorizeExchange()
.pathMatchers(ArrayUtil.toArray(ignoreUrlsConfig.getUrls(),String.class)).permitAll()//白名单配置
.anyExchange().access(authorizationManager)//鉴权管理器配置
.and().exceptionHandling()
.accessDeniedHandler(restfulAccessDeniedHandler)//处理未授权
.authenticationEntryPoint(restAuthenticationEntryPoint)//处理未认证
.and().csrf().disable();
return http.build();
}
}
携带过期请求头再次访问,发现已经可以正常访问了。
总结
至此,微服务中使用Oauth2实现统一认证和鉴权方案终于完善了!
项目源码地址
https://github.com/macrozheng/springcloud-learning/tree/master/micro-oauth2
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