源码

java – 如何多次读取request.getInputStream()


我有这个代码:

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
    logger.info("Filter start...");

    HttpServletRequest httpRequest = (HttpServletRequest) request;
    HttpServletResponse httpResponse = (HttpServletResponse) response;

    String ba = getBaId(getBody(httpRequest));

    if (ba == null) {
        logger.error("Wrong XML");
        httpResponse.setStatus(HttpServletResponse.SC_BAD_REQUEST);
    } else {      

        if (!clients.containsKey(ba)) {
            clients.put(ba, 1);
            logger.info("Client map : init...");
        } else {
            clients.put(ba, clients.get(ba).intValue() + 1);
            logger.info("Threads for " + ba + " = " + clients.get(ba).toString());
        }

        chain.doFilter(request, response);
    }
}

和这个web.xml(包缩短和名称更改,但它看起来相同)



  
    TestFilter
    pkg.TestFilter
  
  
    TestFilter
    /*
  

  
    contextConfigLocation
    WEB-INF/applicationContext.xml
  

  
    org.springframework.web.context.ContextLoaderListener
  

  
    Name
    Name
    pkg.Name
    1
  
  
    Name
    /services/*
  

我想在Filter之后调用Servlet.我希望chain.doFilter(…)可以做到这一点,但我总是在使用chain.doFilter(…)的行上得到这个错误:

java.lang.IllegalStateException: getInputStream() can't be called after getReader()
at com.caucho.server.connection.AbstractHttpRequest.getInputStream(AbstractHttpRequest.java:1933)
at org.apache.cxf.transport.http.AbstractHTTPDestination.setupMessage(AbstractHTTPDestination.java:249)
at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:82)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:283)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:166)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:174)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.doPost(AbstractCXFServlet.java:152)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:153)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
at pkg.TestFilter.doFilter(TestFilter.java:102)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
at java.lang.Thread.run(Thread.java:619)
(0)

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