Question

我正在使用Spring启动并使用过滤器过滤请求。过滤器用于检查用户验证，该验证从请求主体读取一些数据（我已经使用了HttpServletRequestWrapper实现）。从requestWrapper我得到的数据符合预期，我的服务在过滤器中工作得很好。但是，当成功时，过滤器将请求传递给主控制器，我得到一个流关闭异常，如下所示：

[B, I] = sort(orig_matrix.');
Result = I.';

这是Filter类：

   o.s.w.s.m.s.DefaultHandlerExceptionResolver - Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Stream closed; nested exception is java.io.IOException: Stream closed

这里是HttpServletRequestWrapper实现类：

@WebFilter(urlPatterns = {"/getDocs" })
public class AuthenticationFilter implements Filter{

    private static Logger logger = Logger.getLogger(AuthenticationFilter.class);

    @Autowired
    private UserVerificationService userVerificationService;

    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {

        logger.info("checking token in filter");
        HttpServletRequest request = (HttpServletRequest) arg0;
        DocVerificationRequestWrapper myRequestWrapper = new DocVerificationRequestWrapper((HttpServletRequest) request);
        String body = myRequestWrapper.getBody();
        Token token = null;
        try {
            JSONObject jsonObj = new JSONObject(body);
            JSONObject tokenObj = (JSONObject) jsonObj.get("token");
            Gson gson = new Gson();
            token = gson.fromJson(tokenObj.toString(), Token.class);

            if(null != token) {
                    if(userVerificationService==null){
                    ServletContext servletContext = request.getServletContext();
                    WebApplicationContext webApplicationContext = WebApplicationContextUtils.getWebApplicationContext(servletContext);
                    userVerificationService = webApplicationContext.getBean(UserVerificationService.class);
                }
                    String verStatus = userVerificationService.verifyUser(token);
                    logger.info("verStatus = "+verStatus);
                    if(verStatus != null && verStatus.equalsIgnoreCase("success")) {
                        chain.doFilter(request, response);  
                    }else
                        logger.error("Invalid token");
            }else {
                    logger.error("token missing.");
            }
        } catch (JSONException e) {
                logger.error("exception in authetication filter " + e);
        }
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub

    }

}

有任何建议，如何解决此错误？

Answer 1

我想这是因为您不是将实际的包装器传递给链，而是传递原始请求。试试这个：

if(verStatus != null && verStatus.equalsIgnoreCase("success")) {
    chain.doFilter(myRequestWrapper, response);  
}

显然，当ObjectMapper尝试读取请求正文时 - 请求输入流已经关闭，因为它已经被包装器读取了。

HttpMessageNotReadableException：无法读取文档：Stream关闭;

1 个答案: