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114 lines
3.5 KiB
114 lines
3.5 KiB
<?php
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/**
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* @package tikiwiki
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*/
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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// application to display an image from the database with
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// option to resize the image dynamically creating a thumbnail on the fly.
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// This handles 4 types of images, depending on the image_type parameter:
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// "article": Images for articles
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// "submission": Images for article submissions
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// "topic": Images for topics associated to articles
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// "preview": Special case used for article previews. A recently uploaded custom article image. Not cached nor generated here. See tiki-edit_article.php
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// Any other value is invalid
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// If image_type has no value, we default to "article" to preserve previous behaviour
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require_once('tiki-setup.php');
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use Tiki\Lib\Image\Image;
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$artlib = TikiLib::lib('art');
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$access->check_feature('feature_articles');
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// Now check permissions to access this page
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$access->check_permission_either(['tiki_p_read_article','tiki_p_articles_read_heading']);
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if (! isset($_REQUEST["id"])) {
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die;
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}
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$useCache = isset($_REQUEST['cache']) && $_REQUEST['cache'] == 'y'; // cache only the image in list mode
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// If image_type has no value, we default to "article" to preserve previous behaviour
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if (! isset($_REQUEST["image_type"])) {
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$_REQUEST["image_type"] = "article";
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}
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switch ($_REQUEST["image_type"]) {
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case "article":
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$imagePrefix = "article";
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break;
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case "submission":
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$imagePrefix = "article_submission";
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break;
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case "topic":
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$imagePrefix = "article_topic";
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break;
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case "preview":
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$imagePrefix = "article_preview";
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break;
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default:
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die;
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}
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$temporaryFile = $prefs['tmpDir'];
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if ($tikidomain) {
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$temporaryFile .= "/$tikidomain";
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}
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$temporaryFile .= "/$imagePrefix." . $_REQUEST["id"];
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if ($imagePrefix == "article_preview" && ! is_file($temporaryFile)) {
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header("HTTP/1.1 404 Not Found");
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} elseif ($imagePrefix != "article_preview" && (isset($_REQUEST["reload"]) || ! $useCache) || ! is_file($temporaryFile)) {
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// If "reload" parameter is set, recreate the cached image file from database values.
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switch ($_REQUEST["image_type"]) {
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case "article":
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$storedData = $artlib->get_article_image($_REQUEST["id"]);
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break;
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case "submission":
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$storedData = $artlib->get_submission($_REQUEST["id"]);
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break;
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case "topic":
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$storedData = $artlib->get_topic_image($_REQUEST["id"]);
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break;
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default:
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// Invalid value
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die;
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}
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// if blank then die, otherwise we offer to download strangeness
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// this also catches invalid id's
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if (! $storedData) {
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die;
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}
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$type = $storedData["image_type"];
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$data =& $storedData["image_data"];
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header("Content-type: " . $type);
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if (! empty($_REQUEST['width'])) {
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$image = Image::create($data);
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if ($image->getWidth() > $_REQUEST['width']) {
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$image->resize($_REQUEST['width'], 0);
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$data = $image->display();
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}
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if (empty($data)) {
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die;
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}
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}
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if ($useCache && $data) {
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$fp = fopen($temporaryFile, "wb");
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fputs($fp, $data);
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fclose($fp);
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}
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echo $data;
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} else {
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$size = getimagesize($temporaryFile);
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header("Content-type: " . $size['mime']);
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readfile($temporaryFile);
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}
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