topic Regenerate SWF previews in Alfresco Archive

Regenerate SWF previews

cybertoast — Wed, 09 Dec 2009 15:27:02 GMT

Is there a way to force Alfresco to regenerate the swf preview files? I have some previews that are corrupted thanks to installing swftools 0.8.1 (instead of 0.9.0) - the problem with 0.8.1 is previews that just loop through all the pages without stopping. I want to delete these previews and have Al

Re: Regenerate SWF previews

kbonnet — Fri, 11 Dec 2009 13:33:42 GMT

Hi Cybertoast,

I had the same issue. I made a webscript where i could look up the child associations of type thumbnail and gave the ability to remove the child node with name "webpreview". This is the flash file. When requesting the preview again, it is regenerated and ok.

I did this on a per-node basis in a webscript. You can write a javascript too for this and execute it on batches.

Hope this helps.

Koen

Re: Regenerate SWF previews

bertrandf — Fri, 11 Dec 2009 15:43:16 GMT

You can execute a script (regenerateWebpreview.js for example) :

nodes = search.luceneSearch("@cm\\:thumbnailName:\"webpreview\"");
for (var i=0; i<nodes.length; i++) { 
  nodes[i].remove(); 
} ‍‍‍‍

Re: Regenerate SWF previews

kbonnet — Fri, 11 Dec 2009 15:54:18 GMT

nicely done! :!:

Re: Regenerate SWF previews

cybertoast — Fri, 11 Dec 2009 16:59:47 GMT

Very helpful BertrandF. Thanks.

Re: Regenerate SWF previews

sjeandroz — Wed, 22 Jun 2011 13:13:21 GMT

hello,

This script deletes all webpreview, but is it possible, in a script, to regenerate all webpreviews?

thanks

Sjeandroz

Re: Regenerate SWF previews

loftux — Wed, 22 Jun 2011 13:22:35 GMT

Here is an example of a script that update alread existing thumbnails and previews.
It is called recursively from the node you run it (in Alfresco Explorer).
It will probably put quite a load on your server so be careful if you have a large repo.

//This script iterates the current folder and subfolders
//and creates a simple log file in userhome directory of the process.
var counter=0;
var logmessage="LOG OF TASKS\n";
var errmessage="ERRORS\n";

if(space.isContainer)
{
   update(space);
}

logfile = userhome.createFile("Thumbnails refresh Log " + userhome.children.length +".txt");
logfile.content=logmessage + "UPDATED: "+counter.toString() +"\n" + errmessage;
logfile.properties.encoding = "UTF-8";
logfile.properties.mimetype = "text/plain";
logfile.properties.title = "Thumbnails refresh Log";
logfile.properties.description = "This is a log file for Thumbnails refresh";
logfile.save();
logger.log("LX UPDATE \n" + logmessage +"\nUPDATED: "+counter.toString() +"\n" + errmessage);

function update(node)
{
   for each (n in node.children)
   {
      if(n.isDocument)
      {
         try {
            var webpreview = n.getThumbnail("webpreview");
            if(webpreview){
                //logmessage += "LX Thumbnail for " + n.name+ " "+ webpreview.name +"\n";
                webpreview.update();
            }            
         } catch (e) {
            // TODO: handle exception
         }
         try {
            var doclib = n.getThumbnail("doclib");
            if(doclib){
               doclib.update();
            }
         } catch (e) {
            // TODO: handle exception
         }

         counter+=1;
      }
      if(n.isContainer)
         update(n);
   }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: Regenerate SWF previews

sjeandroz — Wed, 22 Jun 2011 14:07:32 GMT

thanks for the response's speed,

If I understand this script, it will juste re-generate existing webpreview, right?

but if I want to have a script (executed by a content rule for example) who create a webpreview when a document is uploaded on Alfresco, is it possible?

Thanks again et sorry for my bad level in english…

Re: Regenerate SWF previews

loftux — Wed, 22 Jun 2011 14:23:06 GMT

Have a look at http://localhost:8080/alfresco/s/index/uri/api/upload
This api already lets you specify the thumbnails to create on upload. Following that url you can also drill down to the javascript to find out what's happening.

Re: Regenerate SWF previews

sjeandroz — Wed, 22 Jun 2011 14:25:01 GMT

great!

Thanks I will study that soon!

Thanks again!