The Office Authorization plug-in for NPAPI browsers issue opening urls with more than 111 characters

Hello:

Our application supports Chrome and it uses the Office Authorization plug-in for NPAPI browsers which gets distributed with Office 2010 to edit excel files (the app provides a webdav interface)

I recently noticed that in Chrome, the plug-in fails to open files whose urls (i.e. the file webdav complete address http://<server name>/<path1>/<path2>.../<file_name>.xlsx where the items between angle brackets are placeholders for the actual names)  have more than 111 chars.

To launch Excel for editing an excel file I am using the code the following code:

getOrCreateContainer: function(containerId)
{
  var container = Ext.get(containerId);
  if (container)
    return container;

  container = new Ext.Element(document.createElement('div'));
  container.id = containerId;
  container.setStyle({ width: '0px', height: '0px', position: 'absolute', overflow: 'hidden', top: '-1000px', left: '-1000px' });

  Ext.getBody().appendChild(container);
  return container;
},

getOrCreateSharePointPluginContainer: function()
{
  var sharePointPluginContainer = this.getOrCreateContainer('_sharePointPluginContainer');
  if (!sharePointPluginContainer.first())
  {
    var domObj = Ext.DomHelper.createDom(
      {
        tag: 'object',
        type: 'application/x-sharepoint',
        style: { visibility: 'hidden', width: '0px', height: '0px' }
      }
    );
    sharePointPluginContainer.appendChild(new Ext.Element(domObj));
  }

  return sharePointPluginContainer;
},


sharePointEditDocument: function (sUrl)
{

  try
  {
    var sho = this.getSharePointOpenDocumentsCtrl();
    if (sho)
    {
      if (!sho.EditDocument(sUrl))
      {
        //todo: use localized message
        alert('Cannot edit file');
        return false;
      }
    }
  }
  catch (e)
  {
    return false;
  }
},

getSharePointOpenDocumentsCtrl: function ()
{
  if (this._sharePointOpenDocumentsControl == null)
  {
      this._sharePointOpenDocumentsControl = this.getOrCreateSharePointPluginContainer().first().dom;
  }
  return this._sharePointOpenDocumentsControl;
},

Basically if the url has more than 111 characters the EditDocument method returns false.


Here are some version numbers of the plug-in.

Microsoft Office (2 files) - Version: 14.0.4730.1010
Office Authorization plug-in for NPAPI browsers
Name:	Microsoft Office 2010
Description:	Office Authorization plug-in for NPAPI browsers
Version:	14.0.4730.1010
Location:	C:\PROGRA~2\MICROS~1\Office14\NPAUTHZ.DLL
Type:	NPAPI
 	 Disable
MIME types:	
MIME type	Description	File extensions
application/x-msoffice14	14.0.4730.1010	
.*
Name:	Microsoft Office 2010
Description:	The plug-in allows you to open and edit files using Microsoft Office applications
Version:	14.0.4761.1000
Location:	C:\PROGRA~2\MICROS~1\Office14\NPSPWRAP.DLL
Type:	NPAPI
 	 Disable
MIME types:	
MIME type	Description	File extensions
application/x-sharepoint	SharePoint Plug-in for Firefox	
If this thing fails once then weird things start happening, I cannot open other files that should normally open. Let's give you an example:
If I have a file 012345678.xlsx that failed to open and I have another one abc.xlsx that would normally open the plugin opens a dialog saying roughly: do you want to open  file abc.xlsx5678.xlsx? 
IIt looks to me as if some buffers get ovewritten.

Any chances this would get fixed, or are there any workarounds?

Other version information:

OS Name    Microsoft Windows 7 Ultimate 64 bit
Version    6.1.7601 Service Pack 1 Build 7601

Chrome: 28.0.1500.95 (Official Build 213514)m

Thanks