當請求從zuul着diferent端點，一些之後的參數獲取DROP掉

Question

春天開機+ entflix zuul，當我在zuul從路由過濾器重定向到不同的端點比原來的崗位PARAM裏面是空的會被丟棄。

任何想法？

Answer 1

其怪，還是coulndt找出確切原因是什麼。正如通常HttpServelteRequest POST請求與原來一樣。但是在zuul中，請求對象被zuul neflix請求包裝，或許會發生。可能是netflix傢伙可以回答這個問題。

最近我能找到這個讓Netflix的上下文對象請求和響應門面，然後重定向一個解決方法。它爲我工作。

import java.lang.reflect.Field; 

import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponseWrapper; 

import org.apache.catalina.connector.RequestFacade; 
import org.apache.catalina.connector.ResponseFacade; 
import org.slf4j.Logger; 
import org.slf4j.LoggerFactory; 
import org.springframework.beans.factory.annotation.Value; 
import org.springframework.stereotype.Component; 
import org.springframework.util.ReflectionUtils; 

import com.netflix.zuul.ZuulFilter; 
import com.netflix.zuul.context.RequestContext; 
import com.netflix.zuul.http.HttpServletRequestWrapper; 

/** 
* 
* @author Sivakumaran Kathamutthu 
* 
*/ 
@Component 
public class RouteFilter extends ZuulFilter { 

    private static final Logger LOGGER = LoggerFactory.getLogger(RouteFilter.class); 


    @Override 
    public String filterType() { 
    return "route"; 
    } 

    @Override 
    public int filterOrder() { 
    return 0; 
    } 

    @Override 
    public boolean shouldFilter() { 
    return redirectFrom != null && !redirectFrom.trim().isEmpty() 
     && RequestContext.getCurrentContext().getRequest().getRequestURI().contains(redirectFrom); 
    } 

    @Override 
    public Object run() { 
    RequestContext context = RequestContext.getCurrentContext(); 
    setRouteHost(context); 

    return null; 
    } 

    /** 
    * This method allows to set the route host into the Zuul request context 
    * provided as parameter. The url is extracted from the orginal request and 
    * the host is extracted from it. 
    * 
    * @param context the provided Zuul request context 
    */ 
    private void setRouteHost(RequestContext context) { 

    String requestURI = context.getRequest().getRequestURI(); 

    try { 

     Field requestField = ReflectionUtils.findField(HttpServletRequestWrapper.class, "req", HttpServletRequest.class); 

     if (requestField != null) { 

     requestField.setAccessible(true); 

     // Get the com.netflix.zuul.http.HttpServletRequestWrapper 
     HttpServletRequestWrapper zuulWrappedRequest = (HttpServletRequestWrapper) ReflectionUtils.getField(requestField, ((HttpServletRequestWrapper) context.getRequest()).getRequest()); 

     // Get the requestFacade where original request resides 
     RequestFacade requestFacade = (RequestFacade) ReflectionUtils.getField(requestField, zuulWrappedRequest); 

     // Get the responseFacade where original response resides 
     ResponseFacade responseFacade = (ResponseFacade) ((HttpServletResponseWrapper) context.getResponse()).getResponse(); 



     requestFacade.getRequestDispatcher("home/home.jsp").forward(requestFacade, responseFacade); 

     } else { 

     throw new RuntimeException("req field is not availble in HTTPServletRequest"); 
     } 

    } catch (Exception ex) { 

     throw e;  
    } 

    } 

}