www.gusucode.com > Typesetter CMS v5.0.3PHP源码程序 > Typesetter CMS v5.0.3/Typesetter/Typesetter/include/thirdparty/Leafo/ScssPhp/Server.php
<?php
/**
* SCSSPHP
*
* @copyright 2012-2015 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://leafo.github.io/scssphp
*/
namespace Leafo\ScssPhp;
use Leafo\ScssPhp\Compiler;
use Leafo\ScssPhp\Exception\ServerException;
use Leafo\ScssPhp\Version;
/**
* Server
*
* @author Leaf Corcoran <leafot@gmail.com>
*/
class Server
{
/**
* @var boolean
*/
private $showErrorsAsCSS;
/**
* @var string
*/
private $dir;
/**
* @var string
*/
private $cacheDir;
/**
* @var \Leafo\ScssPhp\Compiler
*/
private $scss;
/**
* Join path components
*
* @param string $left Path component, left of the directory separator
* @param string $right Path component, right of the directory separator
*
* @return string
*/
protected function join($left, $right)
{
return rtrim($left, '/\\') . DIRECTORY_SEPARATOR . ltrim($right, '/\\');
}
/**
* Get name of requested .scss file
*
* @return string|null
*/
protected function inputName()
{
switch (true) {
case isset($_GET['p']):
return $_GET['p'];
case isset($_SERVER['PATH_INFO']):
return $_SERVER['PATH_INFO'];
case isset($_SERVER['DOCUMENT_URI']):
return substr($_SERVER['DOCUMENT_URI'], strlen($_SERVER['SCRIPT_NAME']));
}
}
/**
* Get path to requested .scss file
*
* @return string
*/
protected function findInput()
{
if (($input = $this->inputName())
&& strpos($input, '..') === false
&& substr($input, -5) === '.scss'
) {
$name = $this->join($this->dir, $input);
if (is_file($name) && is_readable($name)) {
return $name;
}
}
return false;
}
/**
* Get path to cached .css file
*
* @return string
*/
protected function cacheName($fname)
{
return $this->join($this->cacheDir, md5($fname) . '.css');
}
/**
* Get path to meta data
*
* @return string
*/
protected function metadataName($out)
{
return $out . '.meta';
}
/**
* Determine whether .scss file needs to be re-compiled.
*
* @param string $out Output path
* @param string $etag ETag
*
* @return boolean True if compile required.
*/
protected function needsCompile($out, &$etag)
{
if (! is_file($out)) {
return true;
}
$mtime = filemtime($out);
$metadataName = $this->metadataName($out);
if (is_readable($metadataName)) {
$metadata = unserialize(file_get_contents($metadataName));
foreach ($metadata['imports'] as $import => $originalMtime) {
$currentMtime = filemtime($import);
if ($currentMtime !== $originalMtime || $currentMtime > $mtime) {
return true;
}
}
$metaVars = crc32(serialize($this->scss->getVariables()));
if ($metaVars !== $metadata['vars']) {
return true;
}
$etag = $metadata['etag'];
return false;
}
return true;
}
/**
* Get If-Modified-Since header from client request
*
* @return string|null
*/
protected function getIfModifiedSinceHeader()
{
$modifiedSince = null;
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
if (false !== ($semicolonPos = strpos($modifiedSince, ';'))) {
$modifiedSince = substr($modifiedSince, 0, $semicolonPos);
}
}
return $modifiedSince;
}
/**
* Get If-None-Match header from client request
*
* @return string|null
*/
protected function getIfNoneMatchHeader()
{
$noneMatch = null;
if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
$noneMatch = $_SERVER['HTTP_IF_NONE_MATCH'];
}
return $noneMatch;
}
/**
* Compile .scss file
*
* @param string $in Input path (.scss)
* @param string $out Output path (.css)
*
* @return array
*/
protected function compile($in, $out)
{
$start = microtime(true);
$css = $this->scss->compile(file_get_contents($in), $in);
$elapsed = round((microtime(true) - $start), 4);
$v = Version::VERSION;
$t = date('r');
$css = "/* compiled by scssphp $v on $t (${elapsed}s) */\n\n" . $css;
$etag = md5($css);
file_put_contents($out, $css);
file_put_contents(
$this->metadataName($out),
serialize(array(
'etag' => $etag,
'imports' => $this->scss->getParsedFiles(),
'vars' => crc32(serialize($this->scss->getVariables())),
))
);
return array($css, $etag);
}
/**
* Format error as a pseudo-element in CSS
*
* @param \Exception $error
*
* @return string
*/
protected function createErrorCSS(\Exception $error)
{
$message = str_replace(
array("'", "\n"),
array("\\'", "\\A"),
$error->getfile() . ":\n\n" . $error->getMessage()
);
return "body { display: none !important; }
html:after {
background: white;
color: black;
content: '$message';
display: block !important;
font-family: mono;
padding: 1em;
white-space: pre;
}";
}
/**
* Render errors as a pseudo-element within valid CSS, displaying the errors on any
* page that includes this CSS.
*
* @param boolean $show
*/
public function showErrorsAsCSS($show = true)
{
$this->showErrorsAsCSS = $show;
}
/**
* Compile .scss file
*
* @param string $in Input file (.scss)
* @param string $out Output file (.css) optional
*
* @return string|bool
*
* @throws \Leafo\ScssPhp\Exception\ServerException
*/
public function compileFile($in, $out = null)
{
if (! is_readable($in)) {
throw new ServerException('load error: failed to find ' . $in);
}
$pi = pathinfo($in);
$this->scss->addImportPath($pi['dirname'] . '/');
$compiled = $this->scss->compile(file_get_contents($in), $in);
if ($out !== null) {
return file_put_contents($out, $compiled);
}
return $compiled;
}
/**
* Check if file need compiling
*
* @param string $in Input file (.scss)
* @param string $out Output file (.css)
*
* @return bool
*/
public function checkedCompile($in, $out)
{
if (! is_file($out) || filemtime($in) > filemtime($out)) {
$this->compileFile($in, $out);
return true;
}
return false;
}
/**
* Compile requested scss and serve css. Outputs HTTP response.
*
* @param string $salt Prefix a string to the filename for creating the cache name hash
*/
public function serve($salt = '')
{
$protocol = isset($_SERVER['SERVER_PROTOCOL'])
? $_SERVER['SERVER_PROTOCOL']
: 'HTTP/1.0';
if ($input = $this->findInput()) {
$output = $this->cacheName($salt . $input);
$etag = $noneMatch = trim($this->getIfNoneMatchHeader(), '"');
if ($this->needsCompile($output, $etag)) {
try {
list($css, $etag) = $this->compile($input, $output);
$lastModified = gmdate('D, d M Y H:i:s', filemtime($output)) . ' GMT';
header('Last-Modified: ' . $lastModified);
header('Content-type: text/css');
header('ETag: "' . $etag . '"');
echo $css;
} catch (\Exception $e) {
if ($this->showErrorsAsCSS) {
header('Content-type: text/css');
echo $this->createErrorCSS($e);
} else {
header($protocol . ' 500 Internal Server Error');
header('Content-type: text/plain');
echo 'Parse error: ' . $e->getMessage() . "\n";
}
}
return;
}
header('X-SCSS-Cache: true');
header('Content-type: text/css');
header('ETag: "' . $etag . '"');
if ($etag === $noneMatch) {
header($protocol . ' 304 Not Modified');
return;
}
$modifiedSince = $this->getIfModifiedSinceHeader();
$mtime = filemtime($output);
if (strtotime($modifiedSince) === $mtime) {
header($protocol . ' 304 Not Modified');
return;
}
$lastModified = gmdate('D, d M Y H:i:s', $mtime) . ' GMT';
header('Last-Modified: ' . $lastModified);
echo file_get_contents($output);
return;
}
header($protocol . ' 404 Not Found');
header('Content-type: text/plain');
$v = Version::VERSION;
echo "/* INPUT NOT FOUND scss $v */\n";
}
/**
* Based on explicit input/output files does a full change check on cache before compiling.
*
* @param string $in
* @param string $out
* @param boolean $force
*
* @return string Compiled CSS results
*
* @throws \Leafo\ScssPhp\Exception\ServerException
*/
public function checkedCachedCompile($in, $out, $force = false)
{
if (! is_file($in) || ! is_readable($in)) {
throw new ServerException('Invalid or unreadable input file specified.');
}
if (is_dir($out) || ! is_writable(file_exists($out) ? $out : dirname($out))) {
throw new ServerException('Invalid or unwritable output file specified.');
}
if ($force || $this->needsCompile($out, $etag)) {
list($css, $etag) = $this->compile($in, $out);
} else {
$css = file_get_contents($out);
}
return $css;
}
/**
* Constructor
*
* @param string $dir Root directory to .scss files
* @param string $cacheDir Cache directory
* @param \Leafo\ScssPhp\Compiler|null $scss SCSS compiler instance
*/
public function __construct($dir, $cacheDir = null, $scss = null)
{
$this->dir = $dir;
if (! isset($cacheDir)) {
$cacheDir = $this->join($dir, 'scss_cache');
}
$this->cacheDir = $cacheDir;
if (! is_dir($this->cacheDir)) {
mkdir($this->cacheDir, 0755, true);
}
if (! isset($scss)) {
$scss = new Compiler();
$scss->setImportPaths($this->dir);
}
$this->scss = $scss;
$this->showErrorsAsCSS = false;
if (! ini_get('date.timezone')) {
date_default_timezone_set('UTC');
}
}
/**
* Helper method to serve compiled scss
*
* @param string $path Root path
*/
public static function serveFrom($path)
{
$server = new self($path);
$server->serve();
}
}