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AttachmentController.class.php
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AttachmentController.class.php
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<?php
// Copyright 2013 Toby Zerner, Simon Zerner
// This file is part of esoTalk. Please see the included license file for usage information.
if (!defined("IN_ESOTALK")) exit;
class AttachmentController extends ETController {
protected function getAttachment($attachmentId)
{
// Find the attachment in the database.
$model = ET::getInstance("attachmentModel");
$attachment = $model->getById($attachmentId);
// Does this attachment exist?
if (!$attachment or empty($attachment["postId"])) {
$this->render404(T("message.attachmentNotFound"), true);
return false;
}
// Get the post/conversation that this attachment is in, and make sure the user has permission to view it.
$post = ET::postModel()->getById($attachment["postId"]);
$conversation = ET::conversationModel()->getById($post["conversationId"]);
if (!$conversation) {
$this->render404(T("message.attachmentNotFound"), true);
return false;
}
return $attachment;
}
// View an attachment.
public function action_index($attachmentId = false)
{
$attachmentId = explode("_", $attachmentId);
$attachmentId = $attachmentId[0];
if (!($attachment = $this->getAttachment($attachmentId))) return;
$model = ET::getInstance("attachmentModel");
// Serve up the file.
$path = $model->path().$attachmentId.$attachment["secret"];
$file = @fopen($path, 'rb');
$speed = 1024;
if (is_resource($file) === true) {
$size = sprintf('%u', filesize($path));
set_time_limit(0);
// Close the session so the user can still make other requests while this is happening.
if (strlen(session_id()) > 0) session_write_close();
$range = array(0, $size - 1);
// Don't really understand how this code works, tbh.
// From: http://stackoverflow.com/a/7591130
if (array_key_exists('HTTP_RANGE', $_SERVER) === true) {
$range = array_map('intval', explode('-', preg_replace('~.*=([^,]*).*~', '$1', $_SERVER['HTTP_RANGE'])));
if (empty($range[1]) === true) $range[1] = $size - 1;
foreach ($range as $key => $value) $range[$key] = max(0, min($value, $size - 1));
if (($range[0] > 0) || ($range[1] < ($size - 1)))
header(sprintf('%s %03u %s', 'HTTP/1.1', 206, 'Partial Content'), true, 206);
}
header('Accept-Ranges: bytes');
header('Content-Range: bytes ' . sprintf('%u-%u/%u', $range[0], $range[1], $size));
header('Pragma: public');
header('Cache-Control: public, no-cache');
header('Content-Type: '.$model->mime($attachment["filename"]));
header('Content-Length: ' . sprintf('%u', $range[1] - $range[0] + 1));
header('Content-Disposition: inline; filename="' . basename($attachment["filename"]) . '"');
header('Content-Transfer-Encoding: binary');
if ($range[0] > 0) fseek($file, $range[0]);
while ((feof($file) !== true) && (connection_status() === CONNECTION_NORMAL))
echo fread($file, round($speed * 1024)); flush();
fclose($file);
exit;
}
else {
$this->render404(T("message.attachmentNotFound"), true);
return false;
}
}
// Generate/view a thumbnail of an image attachment.
public function action_thumb($attachmentId = false)
{
if (!($attachment = $this->getAttachment($attachmentId))) return;
$model = ET::getInstance("attachmentModel");
$path = $model->path().$attachmentId.$attachment["secret"];
$thumb = $path."_thumb";
if (!file_exists($thumb)) {
try {
$uploader = ET::uploader();
$thumb = $uploader->saveAsImage($path, $thumb, 200, 150, "crop");
$newThumb = substr($thumb, 0, strrpos($thumb, "."));
rename($thumb, $newThumb);
$thumb = $newThumb;
} catch (Exception $e) {
return;
}
}
header('Content-Type: '.$model->mime($attachment["filename"]));
echo file_get_contents($thumb);
}
// Upload an attachment.
public function action_upload()
{
require_once 'qqFileUploader.php';
$uploader = new qqFileUploader();
$uploader->inputName = 'qqfile';
// Set the allowed file types based on config.
$allowedFileTypes = C("plugin.Attachments.allowedFileTypes");
if (!empty($allowedFileTypes))
$uploader->allowedExtensions = $allowedFileTypes;
// Set the max file size based on config.
if ($size = C("plugin.Attachments.maxFileSize"))
$uploader->sizeLimit = $size;
// Generate a unique ID and secret for this attachment.
$attachmentId = uniqid();
$secret = generateRandomString(13, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890");
$name = $uploader->getName();
// Save it to the filesystem.
$model = ET::getInstance("attachmentModel");
$result = $uploader->handleUpload($model->path(), $attachmentId.$secret);
if (!empty($result["success"])) {
$result["uploadName"] = $uploader->getUploadName();
$result["attachmentId"] = $attachmentId;
// Save attachment information to the session.
$session = (array)ET::$session->get("attachments");
$session[$attachmentId] = array(
"attachmentId" => $attachmentId,
"postId" => R("postId"),
"name" => $name,
"secret" => $secret
);
ET::$session->store("attachments", $session);
}
header("Content-Type: text/plain");
echo json_encode($result);
}
// Remove an attachment.
public function action_remove($attachmentId)
{
if (!$this->validateToken()) return;
$session = (array)ET::$session->get("attachments");
$model = ET::getInstance("attachmentModel");
if (isset($session[$attachmentId])) {
$attachment = $session[$attachmentId];
unset($session[$attachmentId]);
ET::$session->store("attachments", $session);
}
else {
$attachment = $model->getById($attachmentId);
// Make sure the user has permission to edit this post.
$permission = false;
if (!empty($attachment["postId"])) {
$post = ET::postModel()->getById($attachment["postId"]);
$conversation = ET::conversationModel()->getById($post["conversationId"]);
$permission = ET::postModel()->canEditPost($post, $conversation);
}
else {
$permission = ET::$session->userId == $attachment["draftMemberId"];
}
if (!$permission) {
$this->renderMessage(T("Error"), T("message.noPermission"));
return false;
}
// Remove the attachment from the database.
$model->deleteById($attachmentId);
}
// Remove the attachment from the filesystem.
$model->removeFile($attachment);
}
// Remove attachments stored in the session for a specific post.
public function action_removeSession($postId)
{
if (!$this->validateToken()) return;
$model = ET::getInstance("attachmentModel");
$attachments = $model->extractFromSession("p".$postId);
foreach ($attachments as $attachment) {
$model->removeFile($attachment);
}
}
}