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Store thumbnails separately   

Sometimes it may be useful to keep original image files and DAlbum generated files (image thumbnails, .albumdef.ini files etc.) in separate folders.

In this sample original images are stored in ./pictures directory, and all generated files in ./generated directory. For example, thumbnail for ./pictures/myfolder/myfile.jpg will be stored in ./generated/myfolder/myfile.jpg. This way ./pictures directory can be read-only.

This functionality is achieved by overriding customAbsfname function that converts image path relative to ./pictures directory (ex. /myfolder/myfile.jpg) to filename (./pictures/myfolder/myfile.jpg or /home/john/public_html/pictures/myfolder/myfile.jpg). Additional steps are made to ensure that .htaccess files are created in ./generated directory as well.

Instructions

1. Edit you custom.php and add the following code. Modify $g_sGeneratedRoot and $g_sGeneratedRootBrowser variables to point to correct directories. These variables are have similar meaning to $g_sAlbumsRoot and $g_sAlbumsRootBrowser, which are described in Securing DAlbum installation.

 // Folder with generated images and .albumdef.ini files
$g_sGeneratedRoot="./generated";

// This is used with direct image access
$g_sGeneratedRootBrowser=dirname_ex($g_sAlbumsRootBrowser) . "/generated";

// returns true if $filename resides under $g_sGeneratedRoot folder
function IsGeneratedLocation($name)
{
   global 
$g_sThumbnailPath$g_sResizedPath;

   
// If you prefer to store .albumdef.ini file in the same folder
   // with original images, comment or remove line
   //
   // basename(strval($name))==".albumdef.ini" ||
   //
   // below.

   
if (  strstr($name,'/' $g_sThumbnailPath '/') ||
         
substr($name,-strlen($g_sThumbnailPath))==$g_sThumbnailPath ||
         
strstr($name,'/' $g_sResizedPath '/') ||
         
substr($name,-strlen($g_sResizedPath))==$g_sResizedPath ||
         
basename(strval($name))==".albumdef.ini" ||
         
getext($name)=='cmt' )
         return 
true;

      return 
false;
}

// override URL generation for direct access. Produces
//    http://mysite.com/photo/generated/_thm/thm_pic1.jpg
// instead of
//    http://mysite.com/photo/pictures/_thm/thm_pic1.jpg)
// for generated images
function customURL($picPath)
{
    global 
$g_bHTTPAuth$g_bDirectAccess$g_sAlbumsRootBrowser;
    global 
$g_sGeneratedRootBrowser;

    if (
$g_bDirectAccess && substr(basename(strval($picPath)),0,1)!='.')
    {
        if (
$g_bHTTPAuth || !isset($_SESSION['UID']))
        {
            if (
IsGeneratedLocation($picPath))
                return 
quoteurl($g_sGeneratedRootBrowser $picPath);
            return 
quoteurl($g_sAlbumsRootBrowser $picPath);
        }
    }
    return 
'photo.php?file=' quoteurl($picPath);
}

// Handle conversion from relative filename to absolute
function customAbsfname($name)
{
    global 
$g_sAlbumsRoot,  $g_sGeneratedRoot;

    if (
IsGeneratedLocation($name))
       return 
$g_sGeneratedRoot $name;

    return 
$g_sAlbumsRoot $name;
}


class 
CExAlbumGenerated extends CAlbum
{
    function 
Create($sPath$parentUsers,$bCleanup$bDeleteImages=false)
    {
       
// Create a corresponging folder in "generated" tree
        
global $g_sGeneratedRoot,$g_sAlbumsRoot;
        if (
$g_sGeneratedRoot!=$g_sAlbumsRoot)
        {
            if (!
checkDirectory($g_sGeneratedRoot.$sPath))
            {
            global 
$g_newDirRights;
            
dalbum_mkdir($g_sGeneratedRoot.$sPath,$g_newDirRights);
            }
        }

        
// Call default implementation
        
if (!parent::Create($sPath,$parentUsers,$bCleanup,$bDeleteImages))
            return 
false;

        
// Create .htaccess in generated folder too
        
if ($g_sGeneratedRoot!=$g_sAlbumsRoot)
        {
            if (
join(",",$parentUsers)==join(",",$this->m_arrUsers))
                
delete_htaccess($g_sGeneratedRoot.$this->m_sFolder);
            else
                
create_htaccess($g_sGeneratedRoot.$this->m_sFolder,$this->m_arrUsers);
        }
        return 
true;
    }
}

function &
customCreateAlbum()
{
    return new 
CExAlbumGenerated();
}

2. Create the directory set in $g_sGeneratedRoot (./generated by default) and CHMOD it to 777.

3. Reindex. Generated files are be now stored in the new folder.