Preserve IPTC data

[FletcherPink]

Hello, I use Plupload to upload images containing IPTC information. However, once uploaded, the images no longer contain the IPTC information. Is there a way to make to keep the data? I tried to incorporate this:

function iptc_make_tag($rec, $data, $value)
{
    $length = strlen($value);
    $retval = chr(0x1C) . chr($rec) . chr($data);
    if($length < 0x8000)
    {
        $retval .= chr($length >> 8) .  chr($length & 0xFF);
    }
    else
    {
        $retval .= chr(0x80) . 
                        chr(0x04) . 
                        chr(($length >> 24) & 0xFF) . 
                        chr(($length >> 16) & 0xFF) . 
                        chr(($length >> 8) & 0xFF) . 
                        chr($length & 0xFF);
    }
    return $retval . $value;
}
$path = $_FILES['file']['tmp_name'];
getimagesize($path,$info);
$iptc = iptcparse ($info["APP13"]);
$description = $iptc['2#120'][0];

$iptc = array('2#116' => iconv('UTF-8', 'macintosh', '© N. XXXX - xxxx'), '2#120' => iconv('UTF-8', 'macintosh',$description));
$data = '';     
foreach($iptc as $tag => $string)
{
    $tag = substr($tag, 2);
    $data .= iptc_make_tag(2, $tag, $string);
}
$content_iptc = iptcembed($data, $path);
$image = fopen($path, "wb");
fwrite($image, $content_iptc);
close($image);  

But without success. Do you have any idea to help me? thank you

[jayarjo]

Can you share typical image that fails to retain iptc data?

[FletcherPink]

Thank you for your interest. Here, below, is an example of IPTC data within an image. I must tell you that during the upload, several manipulation are made: cropping photos, thumbnail creation, application of watermarking and writing database. Would you like me to post the contents of the treatment?

[jayarjo]

Ehm... what you mean during the upload?Do you do those manipulations client-side or after file is uploaded? I'm asking because we actually do preserve IPTC, I just wanted to check why it doesn't get preserved in your case.

[FletcherPink]

These manipulations are performed on the server side using a php file with the following code:

<?php
    // crops proportionally based on width and height
    function resize($img, $w, $h, $newfilename) 
    {
        //Check if GD extension is loaded
        if (!extension_loaded('gd') && !extension_loaded('gd2')) 
        {
            trigger_error("GD is not loaded", E_USER_WARNING);
            return false;
        }

        //Get Image size info
        $imgInfo = getimagesize($img);
        switch ($imgInfo[2])
        {   
            case 1: $im = imagecreatefromgif($img); break;
            case 2: $im = imagecreatefromjpeg($img);  break;
            case 3: $im = imagecreatefrompng($img); break;
            default:  trigger_error('Unsupported filetype!', E_USER_WARNING);  break;
        }

        //If image dimension is smaller, do not resize
        if ($imgInfo[0] <= $w && $imgInfo[1] <= $h) 
        {
            $nHeight = $imgInfo[1];
            $nWidth = $imgInfo[0];
        }
        else
        {
            // yeah, resize it, but keep it proportional
            if ($w/$imgInfo[0] > $h/$imgInfo[1])
            {
                $nWidth = $imgInfo[0]*($h/$imgInfo[1]);
                $nHeight = $h;           
           }
            else
            {
            $nWidth = $w;
            $nHeight = $imgInfo[1]*($w/$imgInfo[0]);
            }
        }

        $nWidth = round($nWidth);
        $nHeight = round($nHeight);  
        $newImg = imagecreatetruecolor($nWidth, $nHeight);

        //Check if this image is PNG or GIF, then set if Transparent
        if(($imgInfo[2] == 1) OR ($imgInfo[2]==3))
        {
            imagealphablending($newImg, false);
            imagesavealpha($newImg,true);
            $transparent = imagecolorallocatealpha($newImg, 255, 255, 255, 127);
            imagefilledrectangle($newImg, 0, 0, $nWidth, $nHeight, $transparent);
        }

        imagecopyresampled($newImg, $im, 0, 0, 0, 0, $nWidth, $nHeight, $imgInfo[0], $imgInfo[1]);

        //Generate the file, and rename it to $newfilename
        switch ($imgInfo[2]) 
        {
            case 1: imagegif($newImg,$newfilename); break;
            case 2: imagejpeg($newImg,$newfilename,100);  break;
            case 3: imagepng($newImg,$newfilename); break;
            default:  trigger_error('Failed resize image!', E_USER_WARNING);  break;
        }    
        return $newfilename;
    }

    // Watermark
    function WaterMark($img)
    {
        $watermark = imagecreatefrompng('../img/filigranne.png');
    $watermark_largeur = imagesx($watermark);
    $watermark_hauteur = imagesy($watermark);

    $watermark_img = imagecreatetruecolor($watermark_largeur, $watermark_hauteur);
    $img_infos = getimagesize($img);
    $watermark_img = imagecreatefromjpeg($img);

    $x_pos = $img_infos[0] - $watermark_largeur;
    $y_pos = $img_infos[1] - $watermark_hauteur;

    imagecopy($watermark_img, $watermark, 0, 0, 0, 0, $watermark_largeur, $watermark_hauteur);

    imagejpeg($watermark_img, $img);
    imagedestroy($watermark_img);
    imagedestroy($watermark);   
    }

    //Convert Mac OS Roman to Iso
    function macRomanToIso($string)
    {
    return strtr($string,
    "\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b
    \x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97
    \x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa1\xa4\xa6\xa7
    \xa8\xab\xac\xae\xaf\xb4\xbb\xbc\xbe\xbf\xc0\xc1
    \xc2\xc7\xc8\xca\xcb\xcc\xd6\xd8\xdb\xe1\xe5\xe6
    \xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf1\xf2\xf3
    \xf4\xf8\xfc\xd2\xd3\xd4\xd5",
    "\xc4\xc5\xc7\xc9\xd1\xd6\xdc\xe1\xe0\xe2\xe4\xe3
    \xe5\xe7\xe9\xe8\xea\xeb\xed\xec\xee\xef\xf1\xf3
    \xf2\xf4\xf6\xf5\xfa\xf9\xfb\xfc\xb0\xa7\xb6\xdf\xae
    \xb4\xa8\xc6\xd8\xa5\xaa\xba\xe6\xf8\xbf\xa1\xac
    \xab\xbb\xa0\xc0\xc3\xf7\xff\xa4\xb7\xc2\xca\xc1
    \xcb\xc8\xcd\xce\xcf\xcc\xd3\xd4\xd2\xda\xdb\xd9
    \xaf\xb8\x22\x22\x27\x27");
    }

    // HTTP headers for no cache etc
    header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
    header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
    header("Cache-Control: no-store, no-cache, must-revalidate");
    header("Cache-Control: post-check=0, pre-check=0", false);
    header("Pragma: no-cache");

    // Settings
    $targetDir = ini_get("upload_tmp_dir") . DIRECTORY_SEPARATOR . "plupload";
    //$targetDir = '../../uploads';

    $cleanupTargetDir = true; // Remove old files
    $maxFileAge = 5 * 3600; // Temp file age in seconds

    // 5 minutes execution time
    @set_time_limit(5 * 60);

    // Get parameters
    $chunk = isset($_REQUEST["chunk"]) ? intval($_REQUEST["chunk"]) : 0;
    $chunks = isset($_REQUEST["chunks"]) ? intval($_REQUEST["chunks"]) : 0;
    $fileName = isset($_REQUEST["name"]) ? $_REQUEST["name"] : '';

    // Clean the fileName for security reasons
    $fileName = preg_replace('/[^\w\._]+/', '_', $fileName);

    // Path image
    $slash = '/';
    $thumbnail_word = 'thumbnail_';
    $targetDir = str_replace(' ', '_', $_REQUEST["name1"]);
    $id_last = $_REQUEST["name2"];
    $repertoire = str_replace('../', '', $targetDir);
    $chemin = $repertoire . $slash . $thumbnail_word . $fileName;
    $photo = $_FILES['file']['tmp_name'];

    //IPTC
    getimagesize($photo,$info);
    $iptc = iptcparse ($info["APP13"]);
    $description = mb_convert_encoding(macRomanToIso($iptc['2#120'][0]),"utf-8", "ISO-8859-1");
    $description = stripcslashes(htmlspecialchars($description,ENT_QUOTES)); 

    // Make sure the fileName is unique but only if chunking is disabled
    if ($chunks < 2 && file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName)) 
    {
        $ext = strrpos($fileName, '.');
    $fileName_a = substr($fileName, 0, $ext);
    $fileName_b = substr($fileName, $ext);

    $count = 1;
    while (file_exists($targetDir . DIRECTORY_SEPARATOR . $fileName_a . '_' . $count . $fileName_b))
        $count++;

    $fileName = $fileName_a . '_' . $count . $fileName_b;
    }

    $filePath = $targetDir . DIRECTORY_SEPARATOR . $fileName;

    // Create target dir
    if (!file_exists($targetDir))
        @mkdir($targetDir);

    // Remove old temp files    
    if ($cleanupTargetDir && is_dir($targetDir) && ($dir = opendir($targetDir))) 
    {
    while (($file = readdir($dir)) !== false) 
        {
            $tmpfilePath = $targetDir . DIRECTORY_SEPARATOR . $file;

        // Remove temp file if it is older than the max age and is not the current file
            if (preg_match('/\.part$/', $file) && (filemtime($tmpfilePath) < time() - $maxFileAge) && ($tmpfilePath != "{$filePath}.part")) 
        {
            @unlink($tmpfilePath);
        }
    }

    closedir($dir);
    } 
    else
    die('{"jsonrpc" : "2.0", "error" : {"code": 100, "message": "Failed to open temp directory."}, "id" : "id"}');

    // Look for the content type header
    if (isset($_SERVER["HTTP_CONTENT_TYPE"]))
        $contentType = $_SERVER["HTTP_CONTENT_TYPE"];

    if (isset($_SERVER["CONTENT_TYPE"]))
    $contentType = $_SERVER["CONTENT_TYPE"];

    // Handle non multipart uploads older WebKit versions didn't support multipart in HTML5
    if (strpos($contentType, "multipart") !== false) 
    {
        if (isset($_FILES['file']['tmp_name']) && is_uploaded_file($_FILES['file']['tmp_name']))
        {
            // Open temp file
            $out = fopen("{$filePath}.part", $chunk == 0 ? "wb" : "ab");
    if ($out)
    {
        // Read binary input stream and append it to temp file
        $in = fopen($_FILES['file']['tmp_name'], "rb");
    if ($in) 
    {
        while ($buff = fread($in, 4096))
        fwrite($out, $buff);
    } 
    else
        die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
        fclose($in);
        fclose($out);
        @unlink($_FILES['file']['tmp_name']);
    }
    else
        die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
    } 
    else
        die('{"jsonrpc" : "2.0", "error" : {"code": 103, "message": "Failed to move uploaded file."}, "id" : "id"}');
    } 
    else
    {
        // Open temp file
        $out = fopen("{$filePath}.part", $chunk == 0 ? "wb" : "ab");
    if ($out) 
    {
        // Read binary input stream and append it to temp file
        $in = fopen("php://input", "rb");
    if ($in)
    {
        while ($buff = fread($in, 4096))
        fwrite($out, $buff);
    }
    else
        die('{"jsonrpc" : "2.0", "error" : {"code": 101, "message": "Failed to open input stream."}, "id" : "id"}');
        fclose($in);
        fclose($out);
    }
    else
        die('{"jsonrpc" : "2.0", "error" : {"code": 102, "message": "Failed to open output stream."}, "id" : "id"}');
    }
    // Check if file has been uploaded
    if (!$chunks || $chunk == $chunks - 1)
    {
        // Strip the temp .part suffix off 
        rename("{$filePath}.part", $filePath);
    }

    // function added by me for creating thumbnails
    $tnPath = $targetDir . DIRECTORY_SEPARATOR . "thumb_".$fileName;
    $img_for_watermark = $targetDir.'/'.$fileName;
    $thumb_image = "thumb_".$fileName;
    $copy = copy($filePath, $tnPath);
    $sourcefile = $tnPath;
    $targetfile = $tnPath;
    $dest_x = $largeur_thumb_upload;
    $dest_y = $hauteur_thumb_upload;
    $jpegqual = $qualite_thumb_upload;
    resize($sourcefile, $dest_x, $dest_y, $targetfile);
    WaterMark($img_for_watermark);

    // Return JSON-RPC response
    die('{"jsonrpc" : "2.0", "result" : null, "id" : "id"}');
    ?>

Do you have an idea ?

[jayarjo]

Ok, I see - you do extract the data before you do any further manipulations, so they shouldn't matter. I will check why IPTC gets stripped in your case.

[FletcherPink]

Great! Thank you very much. I'll wait...