Question

我想通过PHP从我的服务器下载PDF，也可以通过PHP上传。虽然它适用于某些文件，但我收到以下错误消息：单个文件：

ERR_CONTENT_LENGTH_MISMATCH

这是我的下载功能：

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';
 }

如果我删除标题（“Content-Length：”。（字符串）（filesize（$ path）））; 下载有效，但PDF文件会被破坏且无法打开

我也尝试了以下内容：

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';
 }

路径正确，文件位于服务器上。所以上传工作..

我做错了什么？

Answer 1

您可以尝试使用ini_set ( 'memory_limit', '256M' );

增加内存限制

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" );
}

Answer 2

点击此处：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);

用PHP下载 - ＆gt; ERR_CONTENT_LENGTH_MISMATCH

2 个答案: