我有一个奇怪的问题。我在 PHP 中生成 css 和 js，代码已正确缓存在浏览器中，但从图像中可以看出，渲染需要很长时间。
我可以确认缓存正在工作，因为没有对服务器进行调用（我有 firePHP），你可以在这里看到东西http://www.nwkidsmagazine.com/kids-activities-and-things-to-做/
有人对此有解释吗？
编辑 - 这是调用来渲染 css 的函数
public function render_css() {
header( 'HTTP/1.1 200 OK' );
header( 'Content-Type: text/css', true, 200 );
// Aggressive caching to save future requests from the same client.
$etag = '"' . md5( __FILE__ . $_GET[self::GET_VARIBALE_NAME] ) . '"';
header( 'ETag: ' . $etag );
$max_age = 31536000;
header(
'Expires: ' .
gmdate(
'D, d M Y H:i:s',
Ai1ec_Time_Utility::current_time() + $max_age
) .
' GMT'
);
header( 'Cache-Control: public, max-age=' . $max_age );
if (
empty( $_SERVER['HTTP_IF_NONE_MATCH'] ) ||
$etag !== stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] )
) {
// compress data if possible
$zlib_output_handler = ini_get( 'zlib.output_handler' );
if (
true === extension_loaded( 'zlib' ) &&
! in_array( 'ob_gzhandler', ob_list_handlers() ) &&
! in_array(
strtolower( ini_get( 'zlib.output_compression' ) ),
array( '1', 'on' )
) &&
empty( $zlib_output_handler )
) {
ob_start( 'ob_gzhandler' );
header( 'Content-Encoding: gzip' );
} else {
ob_start();
}
$content = $this->get_compiled_css();
echo $content;
ob_end_flush();
} else {
// Not modified!
status_header( 304 );
}
// We're done!
ai1ec_stop( 0 );
}
这是给js的
public function render_js() {
header( 'HTTP/1.1 200 OK' );
header( 'Content-Type: application/javascript; charset=utf-8', true, 200 );
// Aggressive caching to save future requests from the same client.
$etag = '"' . md5( __FILE__ . $_GET[self::LOAD_JS_PARAMETER] ) . '"';
header( 'ETag: ' . $etag );
$max_age = 31536000;// One Year
header(
'Expires: ' .
gmdate(
'D, d M Y H:i:s',
Ai1ec_Time_Utility::current_time() + $max_age
) .
' GMT'
);
header( 'Cache-Control: public, max-age=' . $max_age );
if (
empty( $_SERVER['HTTP_IF_NONE_MATCH'] ) ||
$etag !== stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] )
) {
// compress data if possible
$zlib_output_handler = ini_get( 'zlib.output_handler' );
if (
true === extension_loaded( 'zlib' ) &&
! in_array( 'ob_gzhandler', ob_list_handlers() ) &&
! in_array(
strtolower( ini_get( 'zlib.output_compression' ) ),
array( '1', 'on' )
) &&
empty( $zlib_output_handler )
) {
ob_start( 'ob_gzhandler' );
header( 'Content-Encoding: gzip' );
} else {
ob_start();
}
$js_path = AI1EC_ADMIN_THEME_JS_PATH . DIRECTORY_SEPARATOR;
$common_js = '';
$page_to_load = $_GET[self::LOAD_JS_PARAMETER];
if ( $_GET[self::IS_BACKEND_PARAMETER] === self::TRUE_PARAM ) {
$common_js = file_get_contents( $js_path . 'pages/common_backend.js' );
} else if( $page_to_load === self::EVENT_PAGE_JS ||
$page_to_load === self::CALENDAR_PAGE_JS ||
$page_to_load === self::LOAD_ONLY_FRONTEND_SCRIPTS ) {
if ( $page_to_load === self::LOAD_ONLY_FRONTEND_SCRIPTS &&
true === self::$frontend_scripts_loaded ) {
return;
}
if ( false === self::$frontend_scripts_loaded ) {
$common_js = file_get_contents( $js_path . 'pages/common_frontend.js' );
self::$frontend_scripts_loaded = true;
}
}
// create the config object for require js
$require_config = $this->create_require_js_config_object();
// load require
$require = file_get_contents( $js_path . 'require.js' );
// get jquery
$jquery = $this->get_jquery_version_based_on_browser(
$_SERVER['HTTP_USER_AGENT']
);
// load the script for the page
$page_js = '';
if ( $page_to_load !== self::LOAD_ONLY_BACKEND_SCRIPTS &&
$page_to_load !== self::LOAD_ONLY_FRONTEND_SCRIPTS
) {
$page_js = file_get_contents( $js_path . 'pages/' . $page_to_load );
}
$translation = $this->get_frontend_translation_data();
$permalink = get_permalink( $this->settings->calendar_page_id );
$translation['calendar_url'] = $permalink;
$tranlsation_module = $this->create_require_js_module(
self::FRONTEND_CONFIG_MODULE,
$translation
);
$config = $this->create_require_js_module(
'ai1ec_config',
$this->get_translation_data()
);
echo $require . $require_config . $tranlsation_module .
$config . $jquery . $page_js . $common_js;
ob_end_flush();
} else {
// Not modified!
status_header( 304 );
}
// We're done!
ai1ec_stop( 0 );
}