如何将修改/包装的HTTPServletRequest传递给后续的Zuul过滤器？ [英] How to pass modified/wrapped HTTPServletRequest to subsequent Zuul Filters?

问题描述

我们有一个Zuul Pre-Filter（Filter1），它将检查传入的HTTPServletRequest，并对其中的查询参数进行一些更改，以将其嵌入到自定义创建的请求中（包装HttpServletRequestWrapper）。

现在，我想将这个自定义包装的请求传递给下一个Zuul预过滤器（Filter2）。我怎样才能做到这一点？

在使用常规的Servlet过滤器之前，我们在Filter1中使用以下代码：

  chain.doFilter（new CustomRequestWrapper（request，extra），response）;但是，在Zuul过滤器中，Zuul框架负责调用后续的过滤器，并将请求/请求传递给/响应对象。如何重写？
解决方案
在Filter1执行结束之前，请调用以下内容来覆盖现有的HTTPServletRequest定制请求 
 
 
  RequestContext context = RequestContext.getCurrentContext（）; 
 HttpServletRequest request = context.getRequest（）; 
。 
。 
。 
 context.setRequest（new CustomRequestWrapper（request，extra））; 
  
  参考 ： http：/ /netflix.github.io/zuul/javadoc/zuul-core/com/netflix/zuul/context/RequestContext.html#setRequest(javax.servlet.http.HttpServletRequest） 
 
We have a Zuul Pre-Filter (Filter1) which will inspect the incoming HTTPServletRequest and make some changes to the query parameters in it to embed it to a custom created request (wrapping HttpServletRequestWrapper).

Now, i want to pass this custom wrapped request to the next Zuul Pre-Filter (Filter2). How can i do that ?

Earlier when using regular Servlet Filters, we use as following in my Filter1 
chain.doFilter(new CustomRequestWrapper(request, extra), response);
but, in Zuul Filter, the Zuul framework takes care of invoking the subsequent filters and passing the request/response objects. How can i override that ?
解决方案
Before the Filter1 execution ends, call the following to over-write the existing HTTPServletRequest with our wrapped custom request
RequestContext context = RequestContext.getCurrentContext();
HttpServletRequest request = context.getRequest();
.
.
. 
context.setRequest(new CustomRequestWrapper(request, extra));
Reference: http://netflix.github.io/zuul/javadoc/zuul-core/com/netflix/zuul/context/RequestContext.html#setRequest(javax.servlet.http.HttpServletRequest)

                        
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