Hello Martin, I just have tested Wicket 6.2 Using AjaxDownload: https://svn.apache.org/repos/asf/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/util/AjaxDownload.java
https://svn.apache.org/repos/asf/incubator/openmeetings/trunk/singlewebapp/src/org/apache/openmeetings/web/components/admin/backup/BackupPanel.java(line: 123 currently commented out) I get URL like this on file download: http://192.168.72.100:5080/openmeetings/html/?4-1.IBehaviorListener.0-contents-child-backupUpload&antiCache=1351074316336 And then get ClassCastException from Wiket in: org.apache.wicket.protocol.http.servlet.ServletWebRequest line 305 param.getValue() returns String and cannot be casted to String[] (for the 'antiCache' parameter above) Is there anything I can do to fix it? Thanks a lot in advance :) On Wed, Oct 17, 2012 at 5:39 PM, Maxim Solodovnik <[email protected]>wrote: > 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 > -- WBR Maxim aka solomax -- WBR Maxim aka solomax
