Thanks a lot! Those NullPointer exceptions makes makes me mad :( (we use customized Tomcat 6 in our project) And I get them all the time. I get rid of all callback URL and all parameters passed via URL.
Thanks!! :) On Wed, Oct 17, 2012 at 5:11 PM, Martin Grigorov <[email protected]>wrote: > There was a response from Maxim from OpenMeetings team, but > [email protected] was not in CC: > > <copy> > Hello Martin, > > I have modified the code and have removed AjaxDownloader (since it is not > really necessary). > NullPointerException somehow happens while post parameters parsing > (getCallbackURL) is not working anymore. > > I believe this is somehow connected with custom HomePageMapper > > > https://svn.apache.org/viewvc/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/app/Application.java?revision=1384647&view=markup > > line 62 and below. > Maybe you can help me with this? > > I have added HomePageMapper to implement "single page application" and > remove all URL parameters automaticatilly being added by Wicket. > > Thanks in advance > > </copy> > > > Hi Maxim, > > The NullPointerException is while Wicket tries to read the POST > parameters. The request mappers manipulate only the GET parameters, so > I think it is not related. > I've just checked Jetty 7.6.3 sources and they return String[0] so it > should be OK in this particular version of Jetty. But I'll add the > check anyway with https://issues.apache.org/jira/browse/WICKET-4818 > > On Wed, Oct 17, 2012 at 9:16 AM, Martin Grigorov <[email protected]> > wrote: > > Hi, > > > > On Tue, Oct 16, 2012 at 7:59 PM, [email protected] > > <[email protected]> wrote: > >> Hi, > >> > >> I did follow this tutorial to create a download via Ajax in a form: > >> > https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow > >> > >> The slightly modified code can be seen here: > >> > https://svn.apache.org/viewvc/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/components/admin/backup/BackupPanel.java?view=markup > >> Line 127 "download.initialize(target);" is called. > > > > It seems you have modified BackupPanel. There is no code like > > "download.initialize(target)" > > > >> > >> The rest seems to me similar to the example, except for that I set the > File > >> is set dynamically with every Ajax request. > >> > >> The File itself does exist and is created correctly. > >> > >> However Wicket throws this wired exception: > >> http://pastebin.com/raw.php?i=Fijqjd5y > > > > NullPointerException is not something one should expect so it is a bug. > > According to > https://github.com/apache/wicket/blob/build/wicket-6.0.0/wicket-core/src/main/java/org/apache/wicket/protocol/http/servlet/ServletWebRequest.java#L321 > > its cause is that HttpServletRequest.getParametersMap() returns a Map > > with an entry with value == null. I'm not sure in what cases this can > > happen but I'll add a check for null there. > > > >> > >> The trace seems to be an internal Wicket error. Is this a Bug inside > Wicket? > >> > >> Sebastian > >> -- > >> Sebastian Wagner > >> https://twitter.com/#!/dead_lock > >> http://www.webbase-design.de > >> http://www.wagner-sebastian.com > >> [email protected] > > > > > > > > -- > > Martin Grigorov > > jWeekend > > Training, Consulting, Development > > http://jWeekend.com > > > > -- > Martin Grigorov > jWeekend > Training, Consulting, Development > http://jWeekend.com > -- WBR Maxim aka solomax
