I want to add logging to my Servlet, so I've created Filter which should display request and go to the Servlet. But unfortunately I've encoutered exception:
java.lang.IllegalStateException: getReader() has already been called for this request at org.apache.catalina.connector.Request.getInputStream(Request.java:948) at org.apache.catalina.connector.RequestFacade.getInputStream(RequestFacade.java:338) at com.noelios.restlet.ext.servlet.ServletCall.getRequestEntityStream(ServletCall.java:190)So to fix this problem I've found solution with Wrapper, but it doesn't work. What else can I use/change in code? Any ideas?
[MyHttpServletRequestWrapper]
public class MyHttpServletRequestWrapper extends HttpServletRequestWrapper{ public MyHttpServletRequestWrapper(HttpServletRequest request) { super(request); } private String getBodyAsString() { StringBuffer buff = new StringBuffer(); buff.append(" BODY_DATA START [ "); char[] charArr = new char[getContentLength()]; try { BufferedReader reader = new BufferedReader(getReader()); reader.read(charArr, 0, charArr.length); reader.close(); } catch (IOException e) { e.printStackTrace(); } buff.append(charArr); buff.append(" ] BODY_DATA END "); return buff.toString(); } public String toString() { return getBodyAsString(); }}[MyFilter]
public class MyFilterimplements Filter{ @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { final HttpServletRequest httpServletRequest = (HttpServletRequest) request; final HttpServletResponse httpServletResponse = (HttpServletResponse) response; final HttpServletRequestWrapper requestWrapper = new MyHttpServletRequestWrapper(httpServletRequest); final String requestBody = requestWrapper.toString(); chain.doFilter(request, response); }}