@Override
      public Enumeration<String> getParameterNames() {
        return new Enumeration<String>() {
          private Enumeration<String> rawIterator = rawRequest.getParameterNames();

          @Override
          public boolean hasMoreElements() {
            return rawIterator.hasMoreElements();
          }

          @Override
          public String nextElement() {
            return HtmlQuoting.quoteHtmlChars(rawIterator.nextElement());
          }
        };
      }
Return the set of parameter names, quoting each name.
hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java