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Wed, 02/10/2010 - 09:16

Joined: 10/02/2010

Posts: 4

thumbnails show up as ? mark

I've followed the threads I was able to find regarding thumbnails showing up at ? marks, but I haven't been able to find a solution to my problem yet, so I guess I'll go ahead and ask.

I have ckfinder 1.4.1.1 loaded on my server. It's a hosted windows box, so I don't have access to any of the IIS configuration information. The host is usually pretty good to work with in terms of config changes, but sometimes a bit slow.

As stated the problem I'm running into is that the thumbnails are not showing up, or more correctly not getting created. If I create thumbs on my computer and upload them to the _thumbs directory they show up fine. I have Images.Add "component", "Asp.Net" set in my config file, and the path for CKFinderTempPath set in config.asp and web.config.

I downloaded the wizard app to try and help debug this, and it's failing 4 of the tests. The first one I get the following error:

Checking for the ability to use CreateObject has failed:
Error: the call to server.CreateObject("Msxml2.ServerXMLHTTP.6.0") has failed with error number -2147221005 and message '006~ASP 0177~Server.CreateObject Failed~Invalid ProgID. For additional information specific to this message please visit the Microsoft Online Support site located at: http://www.microsoft.com/contentredirect.asp. '

Wed, 02/10/2010 - 17:01

alfonsoml

Joined: 31/12/2006

Posts: 3737

Re: thumbnails show up as ? mark

Please, try this: in ckfinder\core\connector\asp\utils\image.asp change the classId removing the version (line 730):
from

      Set oXmlHttp = Server.CreateObject("Msxml2.ServerXMLHTTP.3.0")

Wed, 02/10/2010 - 19:53

mountainbloom

Joined: 10/02/2010

Posts: 4

Re: thumbnails show up as ? mark

The original errors #1 #3&4 are still there, I get a new error though in place of #2.

After the first error I now get:

Calling asp.net from the server side has failed:
Error loading "http://www.mountainbloom.com/ckfinder/wizard/assets/hello.aspx"
A connection with the server could not be established

This can happen if the server isn't allowed to make any outbound connection and can't resolve its own IP
You can fix it by editing the host file of the server (or using the DNS management) and adding a loopback.
Open "C:\WINDOWS\system32\drivers\etc\hosts" with notepad and add the following line:
127.0.0.1 www.mountainbloom.com
Then save the file and test again.

Wed, 02/10/2010 - 20:50

alfonsoml

Joined: 31/12/2006

Posts: 3737

Re: thumbnails show up as ? mark

Ups, yes, the change in the wizard must be done also in the assets\check.asp file, search for "Msxml2.ServerXMLHTTP.6.0" and change it to "Msxml2.ServerXMLHTTP"

But the problem is the new error:
The trick used here is to call the same server to an asp.net page, the way to do it is to use the same domain name exactly just to prevent problems in shared hosting, but in this case, the resolution of the domain is the public IP of the server, but the firewall/router of that server doesn't allow to do a loopback using that IP, and so it can't call itself.

I know that I tried previously to add an extra header so it would call directly the 127.0.0.1 IP but with the correct Host name, but I wasn't able to make it work. Unfortunately modifying the hosts file is the only solution that I know for this problem. You should try to explain it to the hosting company, maybe you're lucky as this doesn't mean installing anything, just a little change in one configuration file.

(The usage of "Msxml2.ServerXMLHTTP.6.0" instead of using it in a generic way was a try to check if using some specific version I was able to use the special call that I described)

Fri, 02/12/2010 - 02:45

mountainbloom

Joined: 10/02/2010

Posts: 4

Re: thumbnails show up as ? mark

My host made that change to the hosts file for me, no change in the errors.

I did however notice a couple of things in CKFinder after the hosts file update.
1) the ? marks now show up much faster then before
2) when I upload I now get an error

It was not possible to complete the request. (Error Error returned in call to Asp.Net)

where before I was just getting a timeout.

Fri, 02/12/2010 - 09:33

alfonsoml

Joined: 31/12/2006

Posts: 3737

Re: thumbnails show up as ? mark

Now the server is able to connect to itself, but it seems that it's configured in such a way to only work with one IP, it's returning "No web site is configured at this address."

Please, point them to this thread or to the output of the wizard, I can only guess what's the correct solution for your server, maybe they can try to set

192.168.23.35  www.mountainbloom.com

But they are the ones that can tell what's exactly the correct configuration. Anyway, I would like to know what's their response because I can try to improve the wizard to offer that suggestion (it will be easy if the code that I'm suggesting works)

Fri, 02/12/2010 - 11:45

mountainbloom

Joined: 10/02/2010

Posts: 4

Re: thumbnails show up as ? mark

While I'm waiting for them to make that change so I can test it.

The ASP.NET version of CKFinder works fine on this server, including thumbnails. What's the difference between the thumbnail creation between the ASP.NET version, and the ASP version with Asp.Net selected as it's thumbnail creation method?

Would it be possible to use the ASP.NET versions thumbnail component instead? If it is, would it be safe to use it without the CheckAuthentication?

Thanks again.

Fri, 02/12/2010 - 12:55

alfonsoml

Joined: 31/12/2006

Posts: 3737

Re: thumbnails show up as ? mark

It's up to you to know if you can safely use the asp.net version of CKFinder if you're unable to get the proper values for the CheckAuthentication function. Usually that could mean that anyone would be able to access directly the CKFinder connector and do whatever he wants (upload/delete) files in your server, but you can restrict this is your able to use Basic Authentication at the server.

The asp connector is trying just to tell an asp.net script: "Hey please, take care of resizing this pictures as I'm not able to do it", but your problem at the moment is that it isn't able to send that message to itself, and that's why it doesn't work.

It's not possible to do a "Include" of an asp.net script inside an asp page, so the trick that we are using here is the only one that I know of in order to use the mixture of environments.

Fri, 03/12/2010 - 13:38

qfmomen

Joined: 12/03/2010

Posts: 4

Re: thumbnails show up as ? mark

i am having same problem that my thumbnails are show up as ? mark. Very strange that in IE it shows half of the thumbnails properly and half like ? marks. In Chrome and firefox, no thumbnail at all but ? marks. ASP.NET version is being used. Right now demo.