Téléchargement d'un fichier via la destruction de fichiers PHP .xls

Question

J'ai un morceau de code qui prend un fichier téléchargé par l'utilisateur et le traite. Lorsque l'utilisateur télécharge un fichier .xls, le fichier est déchiqueté. Je soupçonne que cela a quelque chose à voir avec le MIME mais je n'en sais pas trop sur eux. Toute aide serait appréciée.

<?php include ("header1.html") ?> 
<!--- End ---> 
<tr height="100%"> 
    <td align="center" valign="top" style="background-image: url('images/midbg.jpg'); background-repeat:repeat-x; padding-top: 25px; " bgcolor="#e6e6e6" > 

    <!--- Body begins here ---> 

    <table width="725" border="0" cellspacing="0" cellpadding="2"> 
    <tr> 
    <td width="100%" valign="top"> 
    <table style="margin-left:130px; margin-top:20px;"> 
<tr><td> 
<p><strong style="font-size:12px"> </strong> </p> 
<?php 

$userName = $session->userName; 

if ($handle = opendir('fileuploads/'.$userName)) { 
    //echo "Directory handle: $handle\n"; 
    // echo "Files:\n"; 
    $path = 'fileuploads/'.$userName.'/'; 
    /* This is the correct way to loop over the directory. */ 
    while (false !== ($file = readdir($handle))) { 
     if(($file != "Thumbs.db") && ($file != ".")&& ($file != "..")) 
    { 
    $attachment[] = $path.$file; 
    } 
} 
// echo '<p><b>Current total = '.$totalsize.'K</b></p>'; 
closedir($handle); 
} 


    function fileName($inputfile,$userName) 
{ 
    $separator = '/'.$userName.'/'; 
$output = split ($separator, $inputfile); 
return $output[1]; 
} 

$files = $attachment; 
//print_r($files); 
// email fields: to, from, subject, and so on 
$memberEmails = $_POST['emails']; 
    $bcc = $_POST['bccAddress']; 

if ($bcc != '') 
{ 
$bcc = $memberEmails . ',' . $bcc; 
} 
else 
{ 
$bcc = $memberEmails; 
} 

$to = $_POST['toAddress']; 
if($to != '') 
{ 
$to = $userName. "@place.com,". $to; 
} 
else 
{ 
$to = $userName. "@place.com"; 
} 
$cc = $_POST['ccAddress']; 
$from = $userName. "@place.com"; 
$subject =$_POST['subject']; 
$message = $_POST['content']; 
$message = str_replace('\"', '"',$message); 
$headers = "From: ".$_SESSION['fullName']. "<$from>\n"; 

// boundary 
$semi_rand = md5(time()); 
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 
// headers for attachment 
if ($cc != '') 
{ 
$headers .= "CC: ". $cc ."\n"; 
} 

if ($bcc != '') 
{ 
$headers .= "BCC: ". $bcc ."\n"; 
} 
$headers .= "MIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\" {$mime_boundary}\""; 
// multipart boundary 
$message = "This is a multi-part message in MIME format.\n\n" . "--{$mime_boundary}\n" . "Content-Type: text/html; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n"; 

if(count($files) > 0) 
{ 
$message .= "--{$mime_boundary}\n"; 
} 

// preparing attachments 
for($x=0;$x<count($files);$x++){ 
$file = fopen($files[$x],"rb"); 
$data = fread($file,filesize($files[$x])); 
fclose($file); 
$fileName= fileName($files[$x],$userName); 
$data = chunk_split(base64_encode($data)); 
$message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" . 
"Content-Disposition: attachment;\n" . " filename=\"$fileName\"\n" . 
"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n"; 
$y = $x +1; 
if (count($files) > $y) 
{ 
    $message .= "--{$mime_boundary}\n"; 

} 
} 




$ok = @mail($to, $subject, $message, $headers); 


    if ($ok) 
{ 
$logFile = "log/tmlog.log"; 
$logHandle = fopen($logFile, 'a'); 
$logData = "[" . date('Y-m-d H:i:s') . "] " .$userName. " - message sent successfully (". $to. ",".$bcc .",". $cc.")\n"; 
fwrite($logHandle, $logData); 
fclose($logHandle); 
echo '<META HTTP-EQUIV="Refresh" CONTENT="0;URL=fileuploads/sendRm.php?msg=sent">'; 
} 
else 
{ 
$logFile = "log/tmlog.log"; 
$logHandle = fopen($logFile, 'a'); 
$logData = "[" . date('Y-m-d H:i:s') . "] " .$userName. " - message failed\n"; 
fwrite($logHandle, $logData); 
fclose($logHandle); 
echo '<META HTTP-EQUIV="Refresh" CONTENT="0;URL=fileuploads/sendRm.php?msg=fail">'; 
} 

} 
?> 

Answer 1

À quel stade le fichier est-il endommagé? Du côté du serveur immédiatement après le téléchargement du fichier, ou à la fin du client de messagerie lorsque le fichier a été envoyé par courrier électronique?

Voici le code réécrite pour le rendre lisible/conforme aux standards ...

$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 

// headers for attachment 
if ($cc != '') $headers .= "Cc: $cc\r\n";  
if ($bcc != '') $headers .= "Bcc: $bcc\r\n"; 
$headers .= "MIME-Version: 1.0\r\n" 
      . "Content-Type: multipart/mixed; boundary=\"$mime_boundary\"\r\n"; 

// multipart boundary 
$message = "This is a multi-part message in MIME format.\r\n" 
     . "--$mime_boundary\r\n" 
     . "Content-Type: text/html; charset=\"iso-8859-1\"\r\n" 
     . "Content-Transfer-Encoding: 7bit\r\n" 
     . "\r\n" 
     . $message . "\r\n" 
     . "--$mime_boundary"; 

if (count($files)) { // Add attachments 
    for ($x = 0; $x < count($files); $x++){ 
    $data = chunk_split(base64_encode(file_get_contents($files[$x]))); 
    $fileName = fileName($files[$x], $userName); 
    $message .= "\r\n" 
       . "Content-Type: application/octet-stream\r\n" 
       . "Content-Disposition: attachment; filename=\"$fileName\"\r\n" 
       . "Content-Transfer-Encoding: base64\r\n" 
       . "\r\n" 
       . $data . "\r\n" 
       . "--$mime_boundary"; 
    } 
} 

$message .= '--';