CODEWITHSUNDEEP
phphttpdownloadhttp-headerscontent-length
Codehan25
Codehan25

Reputation: 3014

Download with PHP --> ERR_CONTENT_LENGTH_MISMATCH

I would like to download a PDF via PHP from my server, which is also uploaded via PHP. Although it works with some files I get the following error message with individual files:

ERR_CONTENT_LENGTH_MISMATCH

This is my download function:

if($_GET['funktion'] == 'downloadverwaltung')
 {


   $filename = basename($dateiname);
   $path = '/kunden/261105_71522/webseiten/admin/PDF/fern_downloads/'.$rowkurs['courseid'].'/'.$filename.''; // the file made available for download via this PHP file

     if($_SESSION['xle'][$_GET['idsh']]['letype'] == 'fern' && $_GET['link'] == 'ja')
        {
         $path = 'http://ls.gdvz.de/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'fern' && $_GET['link'] != 'ja')
        {
         $path = '/kunden/261105_71522/webseiten/dev.delst/admin/PDF/fern_downloads/'.$_GET['kursid'].'/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'kurs' && $_GET['link'] == 'ja')
        {
         $path = 'http://ls.gdvz.de/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'kurs' && $_GET['link'] != 'ja')
        {
         $path = '/kunden/261105_71522/webseiten/dev.delst/pdf/'.$_GET['kursid'].'/'.$filename.'';
        }                

     $check = file_exists($path);
     if( $_GET['link'] == 'ja')
         $check = fopen($path, "r"); 

     //echo $path;
     if ($check) {
            $mm_type="application/octet-stream"; // modify accordingly to the file type of $path, but in most cases no need to do so

            header("Pragma: public");
            header("Expires: 0");
            header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
            header("Cache-Control: public");
            header("Content-Description: File Transfer");
            header("Content-Type: " . $mm_type);
            header("Content-Length: " .(string)(filesize($path)) );
            header('Content-Disposition: attachment; filename="'.basename($path).'"');
            header("Content-Transfer-Encoding: binary\n");

            readfile($path); // outputs the content of the file

            exit();
        }

        else
          echo'Datei wurde nicht auf dem Server gefunden';
 }

If I remove header("Content-Length: " .(string)(filesize($path)) ); the download works, but the PDF file is then broken and can not be opened.

I also tried the following:

if($_GET['funktion'] == 'downloadverwaltung')
 {


   $filename = basename($dateiname);
   $path = '/kunden/261105_71522/webseiten/admin/PDF/fern_downloads/'.$rowkurs['courseid'].'/'.$filename.''; // the file made available for download via this PHP file

     if($_SESSION['xle'][$_GET['idsh']]['letype'] == 'fern' && $_GET['link'] == 'ja')
        {
         $path = 'http://ls.gdvz.de/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'fern' && $_GET['link'] != 'ja')
        {
         $path = '/kunden/261105_71522/webseiten/dev.delst/admin/PDF/fern_downloads/'.$_GET['kursid'].'/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'kurs' && $_GET['link'] == 'ja')
        {
         $path = 'http://ls.gdvz.de/'.$filename.'';
        }
     elseif($_SESSION['xle'][$_GET['idsh']]['letype'] == 'kurs' && $_GET['link'] != 'ja')
        {
         $path = '/kunden/261105_71522/webseiten/dev.delst/pdf/'.$_GET['kursid'].'/'.$filename.'';
        }                

     //echo $path;
     if (file_exists($path)) {
           // $mm_type="application/octet-stream"; // modify accordingly to the file type of $path, but in most cases no need to do so

           // header("Pragma: public");
           // header("Expires: 0");
           // header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
           // header("Cache-Control: public");
           // header("Content-Description: File Transfer");
           // header("Content-Type: " . $mm_type);
           // header("Content-Length: " .(string)(filesize($path)) );
           // header('Content-Disposition: attachment; filename="'.basename($path).'"');
           // header("Content-Transfer-Encoding: binary\n");

           set_time_limit(0);
           output_file($path, basename($path), 'application/octet-stream');

            exit();
        }

        else
          echo'Datei wurde nicht auf dem Server gefunden';
 }

The path is correct and the file is located on the server. So the upload works..

What am I doing wrong?

Upvotes: 0

Views: 1607

Answers (2)

Max
Max

Reputation: 160

You could try to increase the Memory Limit with ini_set ( 'memory_limit', '256M' );

if (file_exists ( $filepath )) {

    header ( 'content-type: application/octet-stream' );
    header ( 'content-Transfer-Encoding: Binary' );
    header ( 'content-length: ' . filesize ( $filepath ) );
    header ( 'content-disposition: attachment; filename=' . basename ( $filepath ) );

    // setzt temporär die Grenze für den zur Vergügung stehenden Arbeitsspeicher hoch
    ini_set ( 'memory_limit', '256M' );

    ob_clean ();
    ob_flush ();
    flush ();

    readfile ( $filepath );
}
else {
    Throw new Exception ( "Die Datei $filepath konnte nicht gefunden werden" );
}

Upvotes: 2

Ryosaku
Ryosaku

Reputation: 465

Check here: How to make PDF file downloadable in HTML link?

header("Content-Type: application/octet-stream");

$file = $_GET["file"] .".pdf";
header("Content-Disposition: attachment; filename=" . urlencode($file));   
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Description: File Transfer");            
header("Content-Length: " . filesize($file));
flush(); // this doesn't really matter.
$fp = fopen($file, "r");
while (!feof($fp))
{
    echo fread($fp, 65536);
    flush(); // this is essential for large downloads
} 
fclose($fp);

Upvotes: 1

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