[WICKET-2663] Modal Dialog cannot add AjaxLink when UploadWebRequest is in use

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.5
• Fix Version/s: 1.4.7
• Assignee: Igor Vaynberg
• Reporter: Alex Grant
• Created: 06/Jan/10 03:42
• Updated: 05/Feb/10 02:59
• Resolved: 05/Feb/10 02:59

Description

I have a wicket page, with a URL several levels deep that contains

• An initially hidden file upload field (so that multipart is used)
• A link to open an ajax modal popup
• An initially empty table
  I am also using UploadWebRequest to allow the upload progress bar to work.
  When I open the popup, type some data and close the popup, it tries to re-render the table with an extra row, which includes an ajax link to re-show the popup to allow editing. This fails.

At least part of the problem is that the ajax response contains an invalid link to wicket-ajax.js. It should start with "../../", but that is lost when using UploadWebRequest, as newMultipartWebRequest creates a child request that has no interface parameter and therefore a urlDepth of -1.
Changing the application to use the standard ServletWebRequest solves the problem for Firefox and IE8, but Chrome still fails. I have been unable to determine the cause of this. The Wicket Ajax Debug Log shows this:

ERROR: Wicket.Ajax.Call.failure: Error while parsing response: Could not find root <ajax-response> element
INFO: Invoking post-call handler(s)...
INFO: Invoking failure handler(s)...
INFO: Response parsed. Now invoking steps...
ERROR: Wicket.Ajax.Call.processEvaluation: Exception evaluating javascript: SyntaxError: Unexpected end of input
INFO: Response processed successfully.
INFO: Invoking post-call handler(s)...
INFO: refocus last focused component not needed/allowed