256 lines
9.6 KiB
PHP
256 lines
9.6 KiB
PHP
<?php
|
||
$cache = true;
|
||
$cachedir = dirname(__FILE__) . '/assets/cache';
|
||
$cssdir = dirname(__FILE__) . '/assets/css';
|
||
$jsdir = dirname(__FILE__) . '/assets/js';
|
||
|
||
// Determine the directory and type we should use
|
||
switch ($_GET['type']) {
|
||
case 'css':
|
||
$base = realpath($cssdir);
|
||
break;
|
||
case 'javascript':
|
||
$base = realpath($jsdir);
|
||
break;
|
||
default:
|
||
header("HTTP/1.0 503 Not Implemented");
|
||
exit;
|
||
};
|
||
|
||
$type = $_GET['type'];
|
||
$elements = explode(',', $_GET['files']);
|
||
|
||
// Determine last modification date of the files
|
||
$lastmodified = 0;
|
||
while (list(, $element) = each($elements)) {
|
||
$path = realpath($base . '/' . $element);
|
||
|
||
if (($type == 'javascript' && substr($path, -3) != '.js') ||
|
||
($type == 'css' && substr($path, -4) != '.css')) {
|
||
header("HTTP/1.0 403 Forbidden");
|
||
exit;
|
||
}
|
||
|
||
if (substr($path, 0, strlen($base)) != $base || !file_exists($path)) {
|
||
header("HTTP/1.0 404 Not Found");
|
||
exit;
|
||
}
|
||
|
||
$lastmodified = max($lastmodified, filemtime($path));
|
||
}
|
||
|
||
// Send Etag hash
|
||
$hash = $lastmodified . '-' . md5($_GET['files']);
|
||
header("Etag: \"" . $hash . "\"");
|
||
|
||
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
|
||
stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) == '"' . $hash . '"') {
|
||
// Return visit and no modifications, so do not send anything
|
||
header("HTTP/1.0 304 Not Modified");
|
||
header('Content-Length: 0');
|
||
} else {
|
||
// First time visit or files were modified
|
||
if ($cache) {
|
||
// Determine supported compression method
|
||
$gzip = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');
|
||
$deflate = strstr($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate');
|
||
|
||
// Determine used compression method
|
||
$encoding = $gzip ? 'gzip' : ($deflate ? 'deflate' : 'none');
|
||
|
||
// Check for buggy versions of Internet Explorer
|
||
if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Opera') &&
|
||
preg_match('/^Mozilla\/4\.0 \(compatible; MSIE ([0-9]\.[0-9])/i', $_SERVER['HTTP_USER_AGENT'], $matches)) {
|
||
$version = floatval($matches[1]);
|
||
|
||
if ($version < 6)
|
||
$encoding = 'none';
|
||
|
||
if ($version == 6 && !strstr($_SERVER['HTTP_USER_AGENT'], 'EV1'))
|
||
$encoding = 'none';
|
||
}
|
||
|
||
// Try the cache first to see if the combined files were already generated
|
||
$cachefile = 'cache-' . $hash . '.' . $type . ($encoding != 'none' ? '.' . $encoding : '');
|
||
|
||
if (file_exists($cachedir . '/' . $cachefile)) {
|
||
if ($fp = fopen($cachedir . '/' . $cachefile, 'rb')) {
|
||
|
||
if ($encoding != 'none') {
|
||
header("Content-Encoding: " . $encoding);
|
||
}
|
||
|
||
header("Content-Type: text/" . $type);
|
||
header("Content-Length: " . filesize($cachedir . '/' . $cachefile));
|
||
|
||
fpassthru($fp);
|
||
fclose($fp);
|
||
exit;
|
||
}
|
||
}
|
||
}
|
||
|
||
// Get contents of the files
|
||
$contents = '';
|
||
reset($elements);
|
||
while (list(, $element) = each($elements)) {
|
||
$path = realpath($base . '/' . $element);
|
||
$contents .= "\n\n" . file_get_contents($path);
|
||
// $contents = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $contents);
|
||
// $contents = str_replace(': ', ':', $contents);
|
||
// $contents = str_replace(array("\r\n", "\r", "\n", "\t", ' ', ' ', ' '), '', $contents);
|
||
// $contents = fn_minify_css($contents);
|
||
}
|
||
|
||
// Send Content-Type
|
||
header("Content-Type: text/" . $type);
|
||
|
||
if (isset($encoding) && $encoding != 'none') {
|
||
// Send compressed contents
|
||
$contents = gzencode($contents, 9, $gzip ? FORCE_GZIP : FORCE_DEFLATE);
|
||
header("Content-Encoding: " . $encoding);
|
||
header('Content-Length: ' . strlen($contents));
|
||
echo $contents;
|
||
} else {
|
||
// Send regular contents
|
||
header('Content-Length: ' . strlen($contents));
|
||
echo $contents;
|
||
}
|
||
echo strlen($contents);
|
||
|
||
// Store cache
|
||
if ($cache) {
|
||
if ($fp = fopen($cachedir . '/' . $cachefile, 'wb')) {
|
||
fwrite($fp, $contents);
|
||
fclose($fp);
|
||
}
|
||
}
|
||
}
|
||
|
||
define('MINIFY_STRING', '"(?:[^"\\\]|\\\.)*"|\'(?:[^\'\\\]|\\\.)*\'');
|
||
define('MINIFY_COMMENT_CSS', '/\*[\s\S]*?\*/');
|
||
define('MINIFY_COMMENT_HTML', '<!\-{2}[\s\S]*?\-{2}>');
|
||
define('X', "\x1A");
|
||
|
||
function n($s)
|
||
{
|
||
return str_replace(["\r\n", "\r"], "\n", $s);
|
||
}
|
||
|
||
function t($a, $b)
|
||
{
|
||
if ($a && strpos($a, $b) === 0 && substr($a, -strlen($b)) === $b) {
|
||
return substr(substr($a, strlen($b)), 0, -strlen($b));
|
||
}
|
||
return $a;
|
||
}
|
||
|
||
function fn_minify($pattern, $input)
|
||
{
|
||
return preg_split('#(' . implode('|', $pattern) . ')#', $input, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
|
||
}
|
||
|
||
function fn_minify_css($input, $comment = 2, $quote = 2)
|
||
{
|
||
if (!is_string($input) || !$input = n(trim($input))) return $input;
|
||
$output = $prev = "";
|
||
foreach (fn_minify([MINIFY_COMMENT_CSS, MINIFY_STRING], $input) as $part) {
|
||
if (trim($part) === "") continue;
|
||
if ($comment !== 1 && strpos($part, '/*') === 0 && substr($part, -2) === '*/') {
|
||
if (
|
||
$comment === 2 && (
|
||
// Detect special comment(s) from the third character. It should be a `!` or `*` → `/*! keep */` or `/** keep */`
|
||
strpos('*!', $part[2]) !== false ||
|
||
// Detect license comment(s) from the content. It should contains character(s) like `@license`
|
||
stripos($part, '@licence') !== false || // noun
|
||
stripos($part, '@license') !== false || // verb
|
||
stripos($part, '@preserve') !== false
|
||
)
|
||
) {
|
||
$output .= $part;
|
||
}
|
||
continue;
|
||
}
|
||
if ($part[0] === '"' && substr($part, -1) === '"' || $part[0] === "'" && substr($part, -1) === "'") {
|
||
// Remove quote(s) where possible …
|
||
$q = $part[0];
|
||
if (
|
||
$quote !== 1 && (
|
||
// <https://www.w3.org/TR/CSS2/syndata.html#uri>
|
||
substr($prev, -4) === 'url(' && preg_match('#\burl\($#', $prev) ||
|
||
// <https://www.w3.org/TR/CSS2/syndata.html#characters>
|
||
substr($prev, -1) === '=' && preg_match('#^' . $q . '[a-zA-Z_][\w-]*?' . $q . '$#', $part)
|
||
)
|
||
) {
|
||
$part = t($part, $q); // trim quote(s)
|
||
}
|
||
$output .= $part;
|
||
} else {
|
||
$output .= fn_minify_css_union($part);
|
||
}
|
||
$prev = $part;
|
||
}
|
||
return trim($output);
|
||
}
|
||
|
||
function fn_minify_css_union($input)
|
||
{
|
||
if (stripos($input, 'calc(') !== false) {
|
||
// Keep important white–space(s) in `calc()`
|
||
$input = preg_replace_callback('#\b(calc\()\s*(.*?)\s*\)#i', function ($m) {
|
||
return $m[1] . preg_replace('#\s+#', X, $m[2]) . ')';
|
||
}, $input);
|
||
}
|
||
$input = preg_replace([
|
||
// Fix case for `#foo<space>[bar="baz"]`, `#foo<space>*` and `#foo<space>:first-child` [^1]
|
||
'#(?<=[\w])\s+(\*|\[|:[\w-]+)#',
|
||
// Fix case for `[bar="baz"]<space>.foo`, `*<space>.foo`, `:nth-child(2)<space>.foo` and `@media<space>(foo: bar)<space>and<space>(baz: qux)` [^2]
|
||
'#([*\]\)])\s+(?=[\w\#.])#', '#\b\s+\(#', '#\)\s+\b#',
|
||
// Minify HEX color code … [^3]
|
||
'#\#([a-f\d])\1([a-f\d])\2([a-f\d])\3\b#i',
|
||
// Remove white–space(s) around punctuation(s) [^4]
|
||
'#\s*([~!@*\(\)+=\{\}\[\]:;,>\/])\s*#',
|
||
// Replace zero unit(s) with `0` [^5]
|
||
'#\b(?<!\d\.)(?:0+\.)?0+(?:[a-z]+\b)#i',
|
||
// Replace `0.6` with `.6` [^6]
|
||
'#\b0+\.(\d+)#',
|
||
// Replace `:0 0`, `:0 0 0` and `:0 0 0 0` with `:0` [^7]
|
||
'#:(0\s+){0,3}0(?=[!,;\)\}]|$)#',
|
||
// Replace `background(?:-position)?:(0|none)` with `background$1:0 0` [^8]
|
||
'#\b(background(?:-position)?):(?:0|none)([;,\}])#i',
|
||
// Replace `(border(?:-radius)?|outline):none` with `$1:0` [^9]
|
||
'#\b(border(?:-radius)?|outline):none\b#i',
|
||
// Remove empty selector(s) [^10]
|
||
'#(^|[\{\}])(?:[^\{\}]+)\{\}#',
|
||
// Remove the last semi–colon and replace multiple semi–colon(s) with a semi–colon [^11]
|
||
'#;+([;\}])#',
|
||
// Replace multiple white–space(s) with a space [^12]
|
||
'#\s+#'
|
||
], [
|
||
// [^1]
|
||
X . '$1',
|
||
// [^2]
|
||
'$1' . X, X . '(', ')' . X,
|
||
// [^3]
|
||
'#$1$2$3',
|
||
// [^4]
|
||
'$1',
|
||
// [^5]
|
||
'0',
|
||
// [^6]
|
||
'.$1',
|
||
// [^7]
|
||
':0',
|
||
// [^8]
|
||
'$1:0 0$2',
|
||
// [^9]
|
||
'$1:0',
|
||
// [^10]
|
||
'$1',
|
||
// [^11]
|
||
'$1',
|
||
// [^12]
|
||
' '
|
||
], $input);
|
||
return trim(str_replace(X, ' ', $input));
|
||
} |