Question

I have a Tomcat application server and this Java source code:

public class MyServlet extends HttpServlet {
    public MyServlet() {}

    protected void doPut(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        // ... PUT code
    }

    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        // ... GET code
    }
}

With GET everything is fine. The method doGet is called. But from my iPhone app doing a put the doPut method is not called. Nothing happens on the server, I see nothing in the log files. So what´s wrong? Are there any PUT limitations on Tomcat?
How can I debug this? On the iOS device I use a library which I can tell that PUT shall be used, so it should work, because it is a very common framework.

Does anyone have an idea?

Best Regards Tim.

Answer 1

Use wireshark to trace the packets to make sure you actually get a PUT request.

Or similarly setup a separate access log for tomcat (it is already in the default config file, but commented out I believe) to see what is coming in.

If you open in your favorit texteditor the file conf/server.xml in the tomcat directory then you’ll find near the end :

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html -->
    <!--
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
           prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
    -->

if you remove the comment tokens all access will be logged to logs/localhost_access_log.

e.g. :

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html -->
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"  
           prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>