Springcloud中怎么利用zuul实现单点登录

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1.参考

先检查有否认证的token，如果没有则抛出错误，再转到getRedirectForAuthorization，这下就转向了redirect的请求处理

1.ExceptionTranslationFilter

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
      throws IOException, ServletException {
   HttpServletRequest request = (HttpServletRequest) req;
   HttpServletResponse response = (HttpServletResponse) res;

   try {
      chain.doFilter(request, response);

      logger.debug("Chain processed normally");
   }
   catch (IOException ex) {
      throw ex;
   }
   catch (Exception ex) {
      // Try to extract a SpringSecurityException from the stacktrace
      Throwable[] causeChain = throwableAnalyzer.determineCauseChain(ex);
      RuntimeException ase = (AuthenticationException) throwableAnalyzer
            .getFirstThrowableOfType(AuthenticationException.class, causeChain);

      if (ase == null) {
         ase = (AccessDeniedException) throwableAnalyzer.getFirstThrowableOfType(
               AccessDeniedException.class, causeChain);
      }

      if (ase != null) {
         handleSpringSecurityException(request, response, chain, ase);
      }

handleSpringSecurityException这块就将转向login

DelegatingAuthenticationEntryPoint

public void commence(HttpServletRequest request, HttpServletResponse response,
      AuthenticationException authException) throws IOException, ServletException {

会计算到这个类上,LoginUrlAuthenticationEntryPoint,它将生成redirect

org.springframework.security.oauth3.client.token.grant.code.AuthorizationCodeAccessTokenProvider.obtainAccessToken(AuthorizationCodeAccessTokenProvider.java:205)

见下面的异步堆栈：

org.springframework.security.oauth3.client.resource.UserRedirectRequiredException: A redirect is required to get the users approval
	at org.springframework.security.oauth3.client.token.grant.code.AuthorizationCodeAccessTokenProvider.getRedirectForAuthorization(AuthorizationCodeAccessTokenProvider.java:359)
	at org.springframework.security.oauth3.client.token.grant.code.AuthorizationCodeAccessTokenProvider.obtainAccessToken(AuthorizationCodeAccessTokenProvider.java:205)
	at org.springframework.security.oauth3.client.OAuth3RestTemplate.acquireAccessToken(OAuth3RestTemplate.java:221)
	at org.springframework.security.oauth3.client.OAuth3RestTemplate.getAccessToken(OAuth3RestTemplate.java:173)
	at org.springframework.security.oauth3.client.filter.OAuth3ClientAuthenticationProcessingFilter.attemptAuthentication(OAuth3ClientAuthenticationProcessingFilter.java:105)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:121)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at shequ.cloud.server.zuul.security.SecurityConfiguration$2.doFilterInternal(SecurityConfiguration.java:91)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.security.oauth3.client.filter.OAuth3ClientContextFilter.doFilter(OAuth3ClientContextFilter.java:60)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:107)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1676)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
	at org.eclipse.jetty.server.Server.handle(Server.java:524)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
	at java.lang.Thread.run(Thread.java:745)

预过滤器:

0 = {ServletDetectionFilter@9816} ，确定是否支持Dispatch请求
1 = {Servlet30WrapperFilter@9817} ,进行Servlet30请求包装
2 = {FormBodyWrapperFilter@9818} ,FormBody包装
3 = {DebugFilter@9819} 
4 = {PreDecorationFilter@9820} 
5 = {AuthenticationHeaderFilter@9821} ,addIgnoredHeaders不知道是啥意思
6 = {OAuth3TokenRelayFilter@9441} ,这个被跳过了,不知道是否可以直接disable算了

   ctx.addZuulRequestHeader("authorization", ctx.get(TOKEN_TYPE) + " " + getAccessToken(ctx));

正式过滤器：

0 = {RibbonRoutingFilter@9478} 
1 = {SimpleHostRoutingFilter@9669} 
2 = {SendForwardFilter@9692} 

2.zuul中主要的类

2.1 ZuulController

public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {}

2.2 RibbonRoutingFilter

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