Getting post data from HttpServletRequest multiple times

Question

I want to create a logger that put's all the post data into my logfile. I added a interceptor to Spring and added all the necessary stuff to the preHandle method where I am reading out the post data (most of the time it is raw json in my case)

final StringBuilder sb = new StringBuilder(128);
if (request.getMethod().equals("POST")) {
    sb.append("] [data=");
    StringBuffer jb = new StringBuffer();
    String line = null;
    try {
        BufferedReader reader = request.getReader();
        while ((line = reader.readLine()) != null)
        jb.append(line);
        reader.reset();
    } catch (Exception e) { 
    }
    sb.append(jb.toString());
}

Most of the code is taken from HttpServletRequest get JSON POST data where you can read from the comments that you can only read out the post data once! If you do that before the request is finalized you get an exception

java.lang.IllegalStateException: READER

How can I read out the POST data from the request without breaking any further actions?

do you really need the stacktrace, since the reason for the exception is well known, as you can read in the comments of http://stackoverflow.com/questions/3831680/httpservletrequest-get-post-data — MatthiasLaug, May 30 '13 at 16:18
If you think this is a duplicate, please delete you question. — Raedwald, May 30 '13 at 16:25
I already flagged for moderation ... I think it is valid to leave it here as a reference to the other one — MatthiasLaug, May 30 '13 at 18:00

Getting post data from HttpServletRequest multiple times

0 Answers0