1 files changed, 58 insertions, 0 deletions
diff --git a/lib/minimizer.php b/lib/minimizer.php
new file mode 100644
index 00000000000..3dc89e331a6
--- /dev/null
+++ b/lib/minimizer.php
@@ -0,0 +1,58 @@
+<?php
+
+abstract class OC_Minimizer {
+	public function getLastModified($files) {
+		$last_modified = 0;
+		foreach($files as $file_info) {
+			$file = $file_info[0] . '/' . $file_info[2];
+			$filemtime = filemtime($file);
+			if ($filemtime > $last_modified) {
+				$last_modified = $filemtime;
+			}
+		}
+		return $last_modified;
+	}
+
+	abstract public function minimizeFiles($files);
+
+	public function output($files, $cache_key) {
+		header('Content-Type: '.$this->contentType);
+		OC_Response::enableCaching();
+		$last_modified = $this->getLastModified($files);
+		OC_Response::setLastModifiedHeader($last_modified);
+
+		$gzout = false;
+		$cache = OC_Cache::getGlobalCache();
+		if (!OC_Request::isNoCache() && (!defined('DEBUG') || !DEBUG)){
+			$gzout = $cache->get($cache_key.'.gz');
+			if ($gzout) {
+				OC_Response::setETagHeader(md5($gzout));
+			}
+		}
+
+		if (!$gzout) {
+			$out = $this->minimizeFiles($files);
+			$gzout = gzencode($out);
+			OC_Response::setETagHeader(md5($gzout));
+			$cache->set($cache_key.'.gz', $gzout);
+		}
+		if ($encoding = OC_Request::acceptGZip()) {
+			header('Content-Encoding: '.$encoding);
+			$out = $gzout;
+		} else {
+			$out = gzdecode($gzout);
+		}
+		header('Content-Length: '.strlen($out));
+		echo $out;
+	}
+}
+
+if (!function_exists('gzdecode')) {
+	function gzdecode($data,$maxlength=null,&$filename='',&$error='')
+	{
+		if (strcmp(substr($data,0,9),"\x1f\x8b\x8\0\0\0\0\0\0")) {
+			return null;  // Not the GZIP format we expect (See RFC 1952)
+		}
+		return gzinflate(substr($data,10,-8));
+	}
+}