Error "Unknown Error" when uploading a file with CKEditor

Question

In CiviCRM 4.6.5, I'm not able to upload files with CKEditor.

I get the very informative error Unknown error

It's seems to be a permission or problem like that when copying the file but without more information, it's difficult to find what it is.

I have found the forum post https://forum.civicrm.org/index.php?topic=26908.0 but my problem is not one of those described.

Answer 1

After digging, i have found that the problem was in the function packages/kcfinder/core/class/uploader.php :: checkFilePath

This function forbids an upload if you have a symbolic link in your path.

There is also a related issue in CiviCRM JIRA : https://issues.civicrm.org/jira/browse/CRM-15607

EDIT:

Probably not a very good solution but you can patch kcfinder.

In my case it's complicated to remove the symbolic link so I used this as a temporary fix.

Add the following line as the first line of the function checkFilePath to avoid the verification:

     protected function checkFilePath($file) {
+        return True;
         $rPath = realpath($file);
         if (strtoupper(substr(PHP_OS, 0, 3)) == "WIN")
             $rPath = str_replace("\\", "/", $rPath);
         return (substr($rPath, 0, strlen($this->typeDir)) === $this->typeDir);
    }

Answer 2

I had the same case,

the "clean" solution was to set an absolute path to Image Directory and the corresponding absolute URL to Image Upload URL

Answer 3

I ve had the same case, the check in php is case sensitive so i convert all strings to lowercase before checking in the line below ( in uploader.php file ) and it works :
return (strtolower(substr($rPath, 0, strlen($this->typeDir))) === strtolower($this->typeDir));