SimpleHostRoutingFilter

@Override    public Object run() {        RequestContext context = RequestContext.getCurrentContext();        HttpServletRequest request = context.getRequest();        MultiValueMap
    
      headers = this.helper                .buildZuulRequestHeaders(request);        MultiValueMap
     
       params = this.helper                .buildZuulRequestQueryParams(request);        String verb = getVerb(request);        InputStream requestEntity = getRequestBody(request);        if (request.getContentLength() < 0) {            context.setChunkedRequestBody();        }        String uri = this.helper.buildZuulRequestURI(request);        this.helper.addIgnoredHeaders();        try {            HttpResponse response = forward(this.httpClient, verb, uri, request, headers,                    params, requestEntity);            setResponse(response);        }        catch (Exception ex) {            context.set(ERROR_STATUS_CODE, HttpServletResponse.SC_INTERNAL_SERVER_ERROR);            context.set("error.exception", ex);        }        return null;    }
     
    

重点关注

MultiValueMap
    
      params = this.helper                .buildZuulRequestQueryParams(request);
    

在ProxyRequestHelper类里头

public MultiValueMap
    
      buildZuulRequestQueryParams(            HttpServletRequest request) {        Map
     
      > map = HTTPRequestUtils.getInstance().getQueryParams();        MultiValueMap
      
        params = new LinkedMultiValueMap<>();        if (map == null) {            return params;        }        for (String key : map.keySet()) {            for (String value : map.get(key)) {                params.add(key, value);            }        }        return params;    }
      
     
    

再看com/netflix/zuul/util/HTTPRequestUtils.java

public Map
    
     > getQueryParams() {        Map
     
      > qp = RequestContext.getCurrentContext().getRequestQueryParams();        if (qp != null) return qp;        HttpServletRequest request = RequestContext.getCurrentContext().getRequest();        qp = new HashMap
      
       >();        if (request.getQueryString() == null) return null;        StringTokenizer st = new StringTokenizer(request.getQueryString(), "&");        int i;        while (st.hasMoreTokens()) {            String s = st.nextToken();            i = s.indexOf("=");            if (i > 0 && s.length() >= i + 1) {                String name = s.substring(0, i);                String value = s.substring(i + 1);                try {                    name = URLDecoder.decode(name, "UTF-8");                } catch (Exception e) {                }                try {                    value = URLDecoder.decode(value, "UTF-8");                } catch (Exception e) {                }                List
       
         valueList = qp.get(name);                if (valueList == null) {                    valueList = new LinkedList
        
         ();                    qp.put(name, valueList);                }                valueList.add(value);            }            else if (i == -1)            {                String name=s;                String value="";                try {                    name = URLDecoder.decode(name, "UTF-8");                } catch (Exception e) {                }                               List
         
           valueList = qp.get(name); if (valueList == null) { valueList = new LinkedList
          
           (); qp.put(name, valueList); } valueList.add(value); } } RequestContext.getCurrentContext().setRequestQueryParams(qp); return qp; }
          
         
        
       
      
     
    

这里优先取了RequestContext.getCurrentContext().getRequestQueryParams();

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