anchor.diff:              this.url = url;
           }
   
  -        private static ConcurrentHashMap<String,String> tokenServiceMap = new ConcurrentHashMap<>();
  +        private static ConcurrentHashMap<String,String> tokenServiceMap = new ConcurrentHashMap<String,String>();
   
           public String getUrl(){
               return this.url;
  
positive.code:     private HttpURLConnection forwardToServer(HttpServletRequest request, String uri, byte[] postBody) throws IOException{
          //copy the client's request header to the proxy's request
          Enumeration headerNames = request.getHeaderNames();
          HashMap<String, String> mapHeaderInfo = new HashMap<>();
          while (headerNames.hasMoreElements()) {
              String key = (String) headerNames.nextElement();
              String value = request.getHeader(key);
  
negative.code:         byte[] bytes = null;
  
          //build the header sent to server
          HashMap<String, String> headerInfo=new HashMap<String, String>();
          headerInfo.put("Referer", PROXY_REFERER);
          if (method.equals("POST")){
              String[] uriArray = uri.split("\\?", 2);
  