Intercept HTTP requests in server java

问题:

I need to implemented something like a filter or listener, that intercepts HTTP requests and retrieves the HTTP headers for various purposes.

I use Java, Jboss application server and web services. I want this filtering system to be performed prior to the Web Services call - was thinking about aspects but they do not hold the HTTP related stuff. After the filter, the service call should be carried out.

Jax-WS handlers don't work for me either as they only hold the SOAP payload.

Any ideas?

Thanks in advance.

回答1:

can you not create a servlet filter which intercepts all the requests coming to your webservice engine? If you are using Axis or anyother SOAP engine, I hope you should be able to create a filter that intercepts all the requests coming to the main servlet that the SOAP engine provides.

 public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException
  {
    HttpServletRequest httpRequest=(HttpServletRequest)request;
    HttpServletResponse httpResponse=(HttpServletResponse)response;
       Enumeration headerNames = httpRequest.getHeaderNames();
        while(headerNames.hasMoreElements()) {
          String headerName = (String)headerNames.nextElement();
          out.println(headerName);
          out.println(request.getHeader(headerName));
        }
       chain.doFilter(request,response);
}

回答2:

Use libpcap and the Java interface jNetPcap.