将附件文件上传到另一台服务器[Mybb]

I'm using the latest version of mybb (mybb1.8), and it has attachment feature, but it upload the files into current host, I want upload the files to different server or host.

How can I do that ?

Download Mybb18 if you need it: http://resources.mybb.com/downloads/mybb_1800.zip

PHP code of attachment.php file

<?php
/**
 * MyBB 1.8
 * Copyright 2014 MyBB Group, All Rights Reserved
 *
 * Website: http://www.mybb.com
 * License: http://www.mybb.com/about/license
 *
 */

define("IN_MYBB", 1);
define('THIS_SCRIPT', 'attachment.php');

require_once "./global.php";

if($mybb->settings['enableattachments'] != 1)
{
    error($lang->attachments_disabled);
}

// Find the AID we're looking for
if(isset($mybb->input['thumbnail']))
{
    $aid = $mybb->get_input('thumbnail', 1);
}
else
{
    $aid = $mybb->get_input('aid', 1);
}

$pid = $mybb->get_input('pid', 1);

// Select attachment data from database
if($aid)
{
    $query = $db->simple_select("attachments", "*", "aid='{$aid}'");
}
else
{
    $query = $db->simple_select("attachments", "*", "pid='{$pid}'");
}
$attachment = $db->fetch_array($query);

$plugins->run_hooks("attachment_start");

if(!$attachment)
{
    error($lang->error_invalidattachment);
}
$pid = $attachment['pid'];

// Don't check the permissions on preview
if($pid || $attachment['uid'] != $mybb->user['uid'])
{
    $post = get_post($pid);
    $thread = get_thread($post['tid']);

    if(!$thread && !isset($mybb->input['thumbnail']))
    {
        error($lang->error_invalidthread);
    }
    $fid = $thread['fid'];

    // Get forum info
    $forum = get_forum($fid);

    // Permissions
    $forumpermissions = forum_permissions($fid);

    if($forumpermissions['canview'] == 0 || $forumpermissions['canviewthreads'] == 0 || (isset($forumpermissions['canonlyviewownthreads']) && $forumpermissions['canonlyviewownthreads'] != 0 && $thread['uid'] != $mybb->user['uid']) || ($forumpermissions['candlattachments'] == 0 && !$mybb->input['thumbnail']))
    {
        error_no_permission();
    }

    // Error if attachment is invalid or not visible
    if(!$attachment['attachname'] || (!is_moderator($fid, "canviewunapprove") && ($attachment['visible'] != 1 || $thread['visible'] != 1 || $post['visible'] != 1)))
    {
        error($lang->error_invalidattachment);
    }
}

if(!isset($mybb->input['thumbnail'])) // Only increment the download count if this is not a thumbnail
{
    $attachupdate = array(
        "downloads" => $attachment['downloads']+1,
    );
    $db->update_query("attachments", $attachupdate, "aid='{$attachment['aid']}'");
}

// basename isn't UTF-8 safe. This is a workaround.
$attachment['filename'] = ltrim(basename(' '.$attachment['filename']));

$plugins->run_hooks("attachment_end");

if(isset($mybb->input['thumbnail']))
{
    $ext = get_extension($attachment['thumbnail']);
    switch($ext)
    {
        case "gif":
            $type = "image/gif";
            break;
        case "bmp":
            $type = "image/bmp";
            break;
        case "png":
            $type = "image/png";
            break;
        case "jpg":
        case "jpeg":
        case "jpe":
            $type = "image/jpeg";
            break;
        default:
            $type = "image/unknown";
            break;
    }

    header("Content-disposition: filename=\"{$attachment['filename']}\"");
    header("Content-type: ".$type);
    $thumb = $mybb->settings['uploadspath']."/".$attachment['thumbnail'];
    header("Content-length: ".@filesize($thumb));
    $handle = fopen($thumb, 'rb');
    while(!feof($handle))
    {
        echo fread($handle, 8192);
    }
    fclose($handle);
}
else
{
    $ext = get_extension($attachment['filename']);

    switch($attachment['filetype'])
    {
        case "application/pdf":
        case "image/bmp":
        case "image/gif":
        case "image/jpeg":
        case "image/pjpeg":
        case "image/png":
        case "text/plain":
            header("Content-type: {$attachment['filetype']}");
            $disposition = "inline";
            break;

        default:
            $filetype = $attachment['filetype'];

            if(!$filetype)
            {
                $filetype = 'application/force-download';
            }

            header("Content-type: {$filetype}");
            $disposition = "attachment";
    }

    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), "msie") !== false)
    {
        header("Content-disposition: attachment; filename=\"{$attachment['filename']}\"");
    }
    else
    {
        header("Content-disposition: {$disposition}; filename=\"{$attachment['filename']}\"");
    }

    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), "msie 6.0") !== false)
    {
        header("Expires: -1");
    }

    header("Content-length: {$attachment['filesize']}");
    header("Content-range: bytes=0-".($attachment['filesize']-1)."/".$attachment['filesize']);
    $handle = fopen($mybb->settings['uploadspath']."/".$attachment['attachname'], 'rb');
    while(!feof($handle))
    {
        echo fread($handle, 8192);
    }
    fclose($handle);
}

Firstof: a Form that posts(Data, a file) do a server it has not been called from ist considered a security risk. It is not so easy to implement so that browsers feel confident. So your recieving script should be on the same server.

That is why I would move the files after they have been posted.

I would use the command line for that if you have a linux/unix server.

You will have to copy the file from your host onto the target and delete the orginal file when successful.

Either in the filesystem(on the same server) via

system("cp filename targetdir");

or onto a different server via

system("scp filename server:targetdir")

also have a look at "rsync" which ist much more efficient when syncing files from server to server.