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Added support for Data URIs to be automatically embedded into the cached #11

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Added support for Data URIs to be automatically embedded into the cached #11

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142 changes: 139 additions & 3 deletions views/helpers/asset.php
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Original file line number Diff line number Diff line change
Expand Up @@ -247,7 +247,7 @@ function __process($type, $assets) {

//check if the cached file exists
$scripts = Set::extract('/script', $assets);
$fileName = $folder->find($this->__generateFileName($scripts) . '_([0-9]{10}).' . $type);
$fileName = $folder->find($this->__generateFileName($scripts, $type) . '_([0-9]{10}).' . $type);
if ($fileName) {
//take the first file...really should only be one.
$fileName = $fileName[0];
Expand Down Expand Up @@ -309,6 +309,14 @@ function __process($type, $assets) {
$buffer = $this->__preprocessCss($asset, $buffer);
}

// Replace with Data Uri
if (self::__dataURIsupported())
{
$w = '[ \t\r\n\f]*';
$quote = '["\']?';
$css_uri = '(url\('.$w.$quote.')([^\)"\']+)('.$quote.$w.'\))'.$w.'/\*DATA_URI\*/';
$buffer = preg_replace_callback('|'.$css_uri.'|', 'AssetHelper::__replaceWithDataUri', $buffer);
}
$tidy->parse($buffer);
$buffer = $tidy->print->plain();
break;
Expand All @@ -323,7 +331,7 @@ function __process($type, $assets) {
}

//write the file
$fileName = $this->__generateFileName($scripts) . '_' . $ts . '.' . $type;
$fileName = $this->__generateFileName($scripts, $type) . '_' . $ts . '.' . $type;
$file = new File($this->paths['wwwRoot'] . $this->options['cachePaths'][$type] . DS . $fileName);
$file->write(trim($scriptBuffer));
}
Expand Down Expand Up @@ -405,16 +413,20 @@ function __findFile(&$asset, $type) {
* Generate the cached filename.
*
* @param array $names an array of the original file names
* @param string $type css or js
* @return string
* @access private
*/
function __generateFileName($names) {
function __generateFileName($names, $type) {
$fileName = Sanitize::paranoid(str_replace('/', '-', implode('_', $names)), array('_', '-'));

if ($this->options['md5FileName']) {
$fileName = md5($fileName);
}

if (self::__dataURIsupported() && $type == 'css')
$fileName .= '_embedded';

return $fileName;
}

Expand All @@ -428,5 +440,129 @@ function __getPath($type) {

return false;
}

/**
*
* Detect browser and version
* @param unknown_type $user_agent
* @return number|multitype:string number browser and version
*/
private static function __detect_browser ( $user_agent = '' )
{
if (! function_exists ( 'stripos' )) {
function stripos ( $haystack , $needle , $offset = 0 ) {
return strpos ( strtolower ( $haystack ), strtolower ( $needle ), $offset );
}
}
$user_agent = empty( $user_agent ) ? $_SERVER [ 'HTTP_USER_AGENT' ] : $user_agent ;
$browser = array( 'name' => 'default' , 'ver' => 0 );
if ( stripos ( $user_agent , 'Opera' ) !== false ) {
$browser [ 'name' ] = 'opera' ;
if( stripos ( $user_agent , 'Version' ) !== false ) {
# Opera/9.80 (X11; Linux x86_64; U; en) Presto/2.2.15 Version/10.00
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'version/' , strtolower ( $user_agent ))))));
}
else {
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , substr ( $user_agent , ( stripos ( $user_agent , 'opera' ) + strlen ( 'opera' ) + 1 )))));
}
}
elseif ( stripos ( $user_agent , 'MSIE' ) !== false ) {
$browser [ 'name' ] = 'ie' ;
$browser [ 'ver' ] = rtrim ( current ( explode ( ' ' , trim ( end ( explode ( 'msie' , strtolower ( $user_agent )))))), ';' );
}
## Webkit (Safari/Chrome)
elseif ( stripos ( $user_agent , 'AppleWebKit' ) !== false ) {
$browser [ 'name' ] = 'applewebkit' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , substr ( $user_agent , ( stripos ( $user_agent , 'applewebkit' ) + strlen ( 'AppleWebKit' ) + 1 )))));
}
## Gecko/Netscape/Firefox/Flock/Mozilla/Camino/SeaMonkey
elseif ( stripos ( $user_agent , 'Gecko' ) !== false && stripos ( $user_agent , 'like Gecko' ) === false ) {
if ( stripos ( $user_agent , 'Navigator' ) !== false ) {
##Netscape 9+
$browser [ 'name' ] = 'netscape' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'navigator/' , strtolower ( $user_agent ))))));
}
elseif ( stripos ( $user_agent , 'Firefox' ) !== false ) {
## Firefox 0.10 +
$browser [ 'name' ] = 'firefox' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'firefox/' , strtolower ( $user_agent ))))));
}
elseif( stripos ( $user_agent , 'Netscape6' ) !== false ){
#Netscape 6
$browser [ 'name' ] = 'netscape' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'netscape6/' , strtolower ( $user_agent ))))));
}
elseif( stripos ( $user_agent , 'Netscape' ) !== false ){
## Netscape 7-9
$browser [ 'name' ] = 'netscape' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'netscape/' , strtolower ( $user_agent ))))));
}
}
elseif( stripos ( $user_agent , 'Googlebot' ) !== false ){
## Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
$browser [ 'name' ] = 'googlebot' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'googlebot/' , strtolower ( $user_agent ))))), ';' );
}
elseif( stripos ( $user_agent , 'msnbot' ) !== false ){
## msnbot/1.0 (+http://search.msn.com/msnbot.htm)
$browser [ 'name' ] = 'msnbot' ;
$browser [ 'ver' ] = trim ( current ( explode ( ' ' , end ( explode ( 'msnbot/' , strtolower ( $user_agent ))))), ';' );
}
elseif( stripos ( $user_agent , 'Yahoo! Slurp' ) !== false ){
## Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)
$browser [ 'name' ] = 'yahoo' ;
$browser [ 'ver' ] = 1 ;
}
$browser [ 'ver' ] = (float) $browser [ 'ver' ];
return $browser ;
}

private static $DATA_URI_SUPPORTED = null;

/**
*
* Detect browser data uri support
*/
private static function __dataURIsupported ()
{
if (self::$DATA_URI_SUPPORTED != null)
return self::$DATA_URI_SUPPORTED;
$supported = false ;
$browser = self::__detect_browser ();
if ( $browser [ 'name' ] == 'ie' && $browser [ 'ver' ]> 7.9 ) {
$supported = true ;
}
elseif( $browser [ 'name' ] == 'applewebkit' ) {
$supported = true ;
}
elseif( ( $browser [ 'name' ] == 'firefox' && $browser [ 'ver' ]> 2 ) || ( $browser [ 'name' ] == 'opera' && $browser [ 'ver' ]> 8 ) || ( $browser [ 'name' ] == 'netscape' && $browser [ 'ver' ]> 7 )) {
$supported = true ;
}
self::$DATA_URI_SUPPORTED == $supported;
return $supported ;
}

/**
*
* Function for preg_replace_callback to substitute all URIs with Data URIs containing base 64 encoded file data
* If file cannot be found or mime type cannot be determined the uri string is returned.
* @param array $matches
*/
private static function __replaceWithDataUri($matches)
{
$file_loc = APP.DS.WEBROOT_DIR.$matches[2];
$filename = realpath($file_loc);

if (!file_exists($filename))
return ($matches[0]);

$imagetype = exif_imagetype($filename);
if ($imagetype === false)
return ($matches[0]);
$mime = image_type_to_mime_type($imagetype);

$data_uri = "data:$mime;base64,".base64_encode(file_get_contents($filename));
return $matches[1].$data_uri.$matches[3];
}
}
?>