public function testEquals()
{
is(1, true);
is(array(1, 2, 3), array(1, 2, 3));
is(array('a' => 1, 'b' => 2), array('b' => 2, 'a' => 1));
isNot(1, 2);
isSame(array(1, 2, 3), array(1, 2, 3));
isNotSame(array(1, 2, 3), array(3, 2, 1));
isKey('test', array('test' => true));
isNotKey('undefined', array('test' => true));
isAttr('test', (object) array('test' => true));
isNotAttr('undefined', (object) array('test' => true));
isBatch(array(array(1, 1), array(2, 2)));
}
public function resolve(Request $request, Response $response)
{
$path = $this->srcPath . $request->uri('path') . '.url';
// Check if target file is a proxy.
if (!is_file($path)) {
return;
}
$cacheTarget = parse_ini_file($path);
$cacheTarget = @$cacheTarget['URL'];
unset($path);
if (!$cacheTarget) {
Log::warning('Proxy file has not URL parameter.', array('requestUri' => $request->uri(), 'proxyFile' => $request->uri('path') . '.uri'));
$response->status(502);
// Bad Gateway
return;
}
/*! Cache Header Notes
*
* # Cache-Control
* [public | private] Cacheable when public, otherwise the client is responsible for caching.
* [no-cache( \w+)?] When no fields are specified, the whole thing must revalidate everytime,
* otherwise cache it except specified fields.
* [no-store] Ignore caching and pipe into output.
* [max-age=\d+] Seconds before this cache is meant to expire, this overrides Expires header.
* [s-maxage=\d+] Overrides max-age and Expires header, behaves just like max-age.
* (This is for CDN and we are using it.)
* [must-revalidate] Tells those CDNs which are intended to serve stale contents to revalidate every time.
* [proxy-revalidate] Like the "s-" version of max-age, a "must-revalidate" override only for CDN.
* [no-transform] Some CDNs will optimize images and other formats, this "opt-out" of it.
*
* # Expires
* RFC timestamp for an absolute cache expiration, overridden by Cache-Control header.
*
* # ETag
* Hash of anything, weak ETags is not supported at this moment.
*
* # vary
* Too much fun inside and we are too serious about caching, ignore this.
*
* # pragma
* This guy is too old to recognize.
* [no-cache] Only this is known nowadays and is already succeed by Cache-Control: no-cache.
*
*/
// note; Use "cache-meta://" scheme for header and cache meta info, for performance.
// 1. Check if cache exists.
$cache = (array) Cache::get("cache-meta://{$cacheTarget}");
// Cache expiration, in seconds.
// expires = ( s-maxage || max-age || Expires );
if (@$cache['expires'] && time() > $cache['expires']) {
Cache::delete("cache-meta://{$cacheTarget}");
Cache::delete("cache://{$cacheTarget}");
$cache = null;
}
// - If not exists, make normal request to remote server.
// - If exists, make conditional request to remote server.
// - Revalidation, we can skip this request and serve the content if false.
// revalidates = ( Cache-Control:proxy-revalidate || Cache-Control:must-revalidate )
if (!$cache || @$cache['revalidates']) {
$_request = array('uri' => $cacheTarget);
if ($cache) {
// Last-Modified
if (@$cache['headers']['Last-Modified']) {
$_request['headers']['If-Modified-Since'] = $cache['Last-Modified'];
}
// Entity-Tag
if (@$cache['headers']['ETag'] && strpos($cache['headers']['ETag'], 'W\\') !== 0) {
$_request['headers']['If-None-Match'] = $cache['ETag'];
}
} else {
$cache = array();
}
// Make the request
$_response = new Response(array('autoOutput' => false));
(new Request($_request))->send(null, $_response);
unset($_request);
// parse headers into cache settings.
if (in_array($_response->status(), array(200, 304))) {
$res = preg_split('/\\s*,\\s*/', util::unwrapAssoc($_response->header('Cache-Control')));
$res = array_reduce($res, function ($res, $value) {
// todo; Take care of no-cache with field name.
if (strpos($value, '=') > 0) {
$value = explode('=', $value);
$res[$value[0]] = $value[1];
} else {
$res[$value] = true;
}
return $res;
}, array());
// private, no-store, no-cache
if (@$res['private'] || @$res['no-store'] || @$res['no-cache']) {
// note; in case the upstream server change this to uncacheable
Cache::delete("cache-meta://{$cacheTarget}");
Cache::delete("cache://{$cacheTarget}");
$_response->clearBody();
}
if ($_response->status() == 200 && $_response->body()) {
$cache['contents'] = $_response->body();
}
// expires = ( s-maxage || max-age || Expires );
if (@$res['s-maxage']) {
$cache['expires'] = time() + $res['s-maxage'];
} elseif (@$res['max-age']) {
$cache['expires'] = time() + $res['max-age'];
} else {
$res = util::unwrapAssoc($_response->header('Expires'));
if ($res) {
$cache['expires'] = strtotime($res);
}
}
// revalidates = ( Cache-Control:proxy-revalidate || Cache-Control:must-revalidate )
if (@$res['proxy-revalidate'] || @$res['must-revalidate']) {
$cache['revalidates'] = true;
}
unset($res);
}
$cache['headers'] = array_map('core\\Utility::unwrapAssoc', $_response->header());
// PHP does not support chunked, skip this one.
unset($cache['headers']['Transfer-Encoding']);
// note; If cache is to be ignored, the $cacheTarget variable will be already unset().
if (isset($cacheTarget)) {
if (@$cache['contents']) {
Cache::set("cache://{$cacheTarget}", $cache['contents']);
}
Cache::set("cache-meta://{$cacheTarget}", array_filter_keys($cache, isNot('contents')));
}
unset($_response);
}
// note; Send cache headers regardless of the request condition.
if (@$cache['headers']) {
$response->clearHeaders();
foreach ($cache['headers'] as $name => $value) {
$response->header($name, $value, true);
}
unset($name, $value);
}
// note; Handles conditional request
$ch = array_map('core\\Utility::unwrapAssoc', (array) @$cache['headers']);
$mtime = @$ch['Last-Modified'] ? strtotime($ch['Last-Modified']) : false;
// Request headr: If-Modified-Since
if (@$ch['Last-Modified'] && $mtime) {
if (strtotime($request->header('If-Modified-Since')) >= $mtime) {
return $response->status(304);
}
}
// Request header: If-Range
if ($request->header('If-Range')) {
// Entity tag
if (strpos(substr($request->header('If-Range'), 0, 2), '"') !== false && @$ch['ETag']) {
if ($this->compareETags(@$ch['ETag'], $request->header('If-Range'))) {
return $this->response()->status(304);
}
} elseif (strtotime($request->header('If-Range')) === $mtime) {
return $this->response()->status(304);
}
}
unset($mtime);
// Request header: If-None-Match
if (!$request->header('If-Modified-Since') && $request->header('If-None-Match')) {
// Exists but not GET or HEAD
switch ($request->method()) {
case 'get':
case 'head':
break;
default:
return $this->response()->status(412);
}
/*! Note by Vicary @ 24 Jan, 2013
* If-None-Match means 304 when target resources exists.
*/
if ($request->header('If-None-Match') === '*' && @$ch['ETag']) {
return $this->response()->status(304);
}
if ($this->compareETags(@$ch['ETag'], preg_split('/\\s*,\\s*/', $request->header('If-None-Match')))) {
return $this->response()->status(304);
}
}
// Request header: If-Match
if (!$request->header('If-Modified-Since') && $request->header('If-Match')) {
// Exists but not GET or HEAD
switch ($request->method()) {
case 'get':
case 'head':
break;
default:
return $this->response()->status(412);
}
if ($request->header('If-Match') === '*' && !@$ch['ETag']) {
return $this->response()->status(412);
}
preg_match_all('/(?:^\\*$|(:?"([^\\*"]+)")(?:\\s*,\\s*(:?"([^\\*"]+)")))$/', $request->header('If-Match'), $eTags);
// 412 Precondition Failed when nothing matches.
if (@$eTags[1] && !in_array($eTag, (array) $eTags[1])) {
return $this->response()->status(412);
}
}
if ($cacheTarget && empty($cache['contents'])) {
$cache['contents'] = Cache::get("cache://{$cacheTarget}");
}
// Output the cahce content
$response->send($cache['contents'], 200);
}
