<?php
-ob_clean();
-
-list ($height, $imgpath) = explode('/', ltrim($Args, '/'), 2);
-$width= 1000;
+if (!$User) return;
+list ($size, $imgpath) = explode('/', ltrim($Page->path, '/'), 2);
$imgpath = preg_replace('{^(?=[0-9]+/)}', 'data/', $imgpath, 1);
if (!file_exists($imgpath)) {
http_response_code(404);
+ $imgpath = '404.png';
+ if (!file_exists($imgpath)) {
+ exit;
+ }
+}
+
+try {
+ $target = mkthumb($imgpath, $size);
+}
+catch (Throwable $e) {
+ http_response_code($e->getCode() ?: 500);
+ header("X-Error: ".explode("\n", $e->getMessage())[0], FALSE);
+ $target = '500.png';
+ if (file_exists($target)) {
+ header('Content-type: '.mime_content_type($target));
+ readfile($target);
+ exit;
+ }
+ trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
exit;
}
-$target = "thumb/$height/$imgpath";
-if (!file_exists($target)) {
+header('Cache-Control: max-age=2628000');
+header('Content-type: '.mime_content_type($target));
+readfile($target);
+exit;
+
+function mkthumb($source, $size)
+{
+ if (strpos($size, 'x') !== FALSE) {
+ list ($width, $height) = explode('x', $size);
+ if (empty($height)) {
+ $height = $width * 4;
+ }
+ }
+ else {
+ $height = $size;
+ }
+ if (empty($width)) {
+ $width = $height * 4;
+ }
+ $target = "thumb/$size/$source";
+
+ if (isset($_GET['backend'])) {
+ $backend = $_GET['backend'];
+ }
+ elseif (file_exists($target)) {
+ return $target;
+ }
+ elseif (extension_loaded('gd')) {
+ $backend = 'gd';
+ }
+ else {
+ $backend = 'exec';
+ }
+ $backend = "mkthumb_$backend";
+
@mkdir(dirname($target), 0777, TRUE);
+ $backend($source, $target, $width, $height);
+ return $target;
+}
+function mkthumb_gd($source, $target, $width, $height)
+{
+ $data = imagecreatefromstring(file_get_contents($source));
+ if (!$data) throw new Exception("error reading $source");
+ $orgwidth = imagesx($data);
+ $orgheight = imagesy($data);
+ $width = min($width, $orgwidth * $height / $orgheight);
+ $gd = imagecreatetruecolor($width, $height);
+ //TODO: trim
+ imagecopyresampled($gd, $data, 0, 0, 0, 0,
+ $width, $height, $orgwidth, $orgheight);
+ imagejpeg($gd, $target, 90);
+}
+
+function mkthumb_exec($source, $target, $width, $height)
+{
+ if (!function_exists('popen')) {
+ throw new Exception("exec disallowed on this server", 501);
+ }
$cmd = implode(' ', array_map('escapeshellarg', [
'convert',
+ '-delete', '1--1', # static
'-trim',
+ '-background', 'white', '-layers', 'flatten', # opaque
+ '-auto-orient', # apply exif rotation
+ '-interlace', 'plane', # progressive
+ '-strip', '-taint', # omit metadata
+ '-sampling-factor', '4:2:0', '-colorspace', 'sRGB', # half chroma
'-resize', "${width}x${height}",
- '-quality', '90%',
- $imgpath, $target
+ '-quality', '85%',
+ $source, "jpg:$target"
]));
$return = shell_exec("$cmd 2>&1");
if ($return) {
- http_response_code(500);
- trigger_error("thumbnail creation failed: $return", E_USER_WARNING);
- exit;
+ throw new Exception($return);
}
}
-
-header('Content-type: '.mime_content_type($target));
-readfile($target);
-exit;