从zuul过滤器发送重定向
从zuul过滤器发送重定向
提问于 2017-06-27 06:16:59
我正在实现对我们的zuul过滤器集的一个补充。这个额外的筛选器将查看标头，并决定应该将请求重定向到我将配置的已知位置。
这是筛选器的run方法的主体
@Override
public Object run() {
log.debug("Running the PreRouteTransMarkAndLoggingZuulFilter filter ");
// retrieve redirect URL
String redirectURL = filterConfigurationBean.getRedirectURL();
if (redirectURL.isEmpty()) {
return null;
}
// get the white list for allowed entries
Set<String> whiteList = new HashSet<>(Arrays.asList(filterConfigurationBean.getWhiteList().split(",")));
RequestContext ctx = RequestContext.getCurrentContext();
// if request url is part of white list then allow
String url = ctx.getRequest().getRequestURL().toString();
if (checkWhiteList(url, whiteList)) {
return null;
}
// get headers
// check if an authorization header is present
if (validHeader(ctx.getRequest())) {
return null;
}
// if it got to here then if no header then redirect request
try {
ctx.getResponse().sendRedirect(redirectURL);
} catch (IOException e) {
log.error("unable to send a redirect to the login page");
}
return null;
}好的，所以我实现并测试了它(它被定义为一个预过滤器，因为我不想在路由阶段发送请求。
在更远的地方，它抛出了一个异常。
2017-06-26 17:00:36.482 WARN 6267 --- [tp1303192419-23] o.s.c.n.z.filters.post.SendErrorFilter : Error during filtering
com.netflix.zuul.exception.ZuulException: Filter threw Exception
at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:227)
at com.netflix.zuul.FilterProcessor.runFilters(FilterProcessor.java:157)
at com.netflix.zuul.FilterProcessor.postRoute(FilterProcessor.java:92)
at com.netflix.zuul.ZuulRunner.postRoute(ZuulRunner.java:87)
at com.netflix.zuul.http.ZuulServlet.postRoute(ZuulServlet.java:107)
at com.netflix.zuul.http.ZuulServlet.service(ZuulServlet.java:88)
at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:157)
at org.springframework.cloud.netflix.zuul.web.ZuulController.handleRequest(ZuulController.java:44)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:50)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:841)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:206)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:208)
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$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
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$CachedChain.doFilter(ServletHandler.java:1637)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at com.cisco.phisphere.routerservice.BasicCORSFilter.doFilter(BasicCORSFilter.java:78)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:564)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.UndeclaredThrowableException: null
at org.springframework.util.ReflectionUtils.rethrowRuntimeException(ReflectionUtils.java:317)
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.run(SendResponseFilter.java:115)
at com.netflix.zuul.ZuulFilter.runFilter(ZuulFilter.java:112)
at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:193)
... 75 common frames omitted
Caused by: org.eclipse.jetty.io.EofException: Closed
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:476)
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.writeResponse(SendResponseFilter.java:214)
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.writeResponse(SendResponseFilter.java:183)
at org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter.run(SendResponseFilter.java:112)
... 77 common frames omitted所以我的问题是。这是从zuul执行重定向的正确方式吗？
我有一个明确的重定向条件和一个明确的发送位置。如果条件成立，但被重定向到外部位置，我不希望此请求继续。
谢谢
回答 1
Stack Overflow用户
回答已采纳
发布于 2017-06-27 10:18:15
好的，所以我尝试了一下，并弄明白了。
您需要通过设置ctx.setSendZuulResponse(false)来确保RibbonRoutingFilter不会触发，因为该过滤器使用它来确定它是否应该触发。
接下来设置ctx.put(FORWARD_TO_KEY，redirectURL)以确保触发SendForward过滤器。将redirectURL设置为您希望它到达的位置。
还要设置ctx.getResponse().sendRedirect(redirectURL)，否则它会将到原始服务的路由路径作为前缀添加，重定向将失败。
@Override
public Object run() {
log.debug("Running the AuthorizationPassFilter filter ");
// retrieve redirect URL
String redirectURL = filterConfigurationBean.getRedirectURL();
if (redirectURL.isEmpty()) {
return null;
}
// get the white list for allowed entries
Set<String> whiteList = new HashSet<>(Arrays.asList(filterConfigurationBean.getWhiteList().split(",")));
RequestContext ctx = RequestContext.getCurrentContext();
// if request url is part of white list then allow
String url = ctx.getRequest().getRequestURL().toString();
if (checkWhiteList(url, whiteList)) {
return null;
}
// get headers
// check if an authorization header is present
if (validHeader(ctx.getRequest())) {
return null;
}
// if it got to here then if no header then redirect request
try {
ctx.setSendZuulResponse(false);
ctx.put(FORWARD_TO_KEY, redirectURL);
ctx.setResponseStatusCode(HttpStatus.SC_TEMPORARY_REDIRECT);
ctx.getResponse().sendRedirect(redirectURL);
} catch (IOException e) {
log.error("unable to send a redirect to the login page");
}
return null;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/44769469
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