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Laravel version update

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Laravel version update
This commit is contained in:
Manish Verma
2018-08-06 18:48:58 +05:30
parent d143048413
commit 126fbb0255
13678 changed files with 1031482 additions and 778530 deletions
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248
vendor/symfony/http-kernel/HttpCache/HttpCache.php vendored
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@@ -15,10 +15,10 @@
namespace Symfony\Component\HttpKernel\HttpCache;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\TerminableInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\TerminableInterface;
/**
* Cache provides HTTP caching.
@@ -69,11 +69,6 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
* the cache can serve a stale response when an error is encountered (default: 60).
* This setting is overridden by the stale-if-error HTTP Cache-Control extension
* (see RFC 5861).
*
* @param HttpKernelInterface $kernel An HttpKernelInterface instance
* @param StoreInterface $store A Store instance
* @param SurrogateInterface $surrogate A SurrogateInterface instance
* @param array $options An array of options
*/
public function __construct(HttpKernelInterface $kernel, StoreInterface $store, SurrogateInterface $surrogate = null, array $options = array())
{
@@ -170,30 +165,35 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
// FIXME: catch exceptions and implement a 500 error page here? -> in Varnish, there is a built-in error page mechanism
if (HttpKernelInterface::MASTER_REQUEST === $type) {
$this->traces = array();
$this->request = $request;
// Keep a clone of the original request for surrogates so they can access it.
// We must clone here to get a separate instance because the application will modify the request during
// the application flow (we know it always does because we do ourselves by setting REMOTE_ADDR to 127.0.0.1
// and adding the X-Forwarded-For header, see HttpCache::forward()).
$this->request = clone $request;
if (null !== $this->surrogate) {
$this->surrogateCacheStrategy = $this->surrogate->createCacheStrategy();
}
}
$path = $request->getPathInfo();
if ($qs = $request->getQueryString()) {
$path .= '?'.$qs;
}
$this->traces[$request->getMethod().' '.$path] = array();
$this->traces[$this->getTraceKey($request)] = array();
if (!$request->isMethodSafe()) {
if (!$request->isMethodSafe(false)) {
$response = $this->invalidate($request, $catch);
} elseif ($request->headers->has('expect')) {
} elseif ($request->headers->has('expect') || !$request->isMethodCacheable()) {
$response = $this->pass($request, $catch);
} elseif ($this->options['allow_reload'] && $request->isNoCache()) {
/*
If allow_reload is configured and the client requests "Cache-Control: no-cache",
reload the cache by fetching a fresh response and caching it (if possible).
*/
$this->record($request, 'reload');
$response = $this->fetch($request, $catch);
} else {
$response = $this->lookup($request, $catch);
}
$this->restoreResponseBody($request, $response);
$response->setDate(\DateTime::createFromFormat('U', time(), new \DateTimeZone('UTC')));
if (HttpKernelInterface::MASTER_REQUEST === $type && $this->options['debug']) {
$response->headers->set('X-Symfony-Cache', $this->getLog());
}
@@ -291,7 +291,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
* it triggers "miss" processing.
*
* @param Request $request A Request instance
* @param bool $catch whether to process exceptions
* @param bool $catch Whether to process exceptions
*
* @return Response A Response instance
*
@@ -299,13 +299,6 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
*/
protected function lookup(Request $request, $catch = false)
{
// if allow_reload and no-cache Cache-Control, allow a cache reload
if ($this->options['allow_reload'] && $request->isNoCache()) {
$this->record($request, 'reload');
return $this->fetch($request, $catch);
}
try {
$entry = $this->store->lookup($request);
} catch (\Exception $e) {
@@ -354,7 +347,9 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
$subRequest = clone $request;
// send no head requests because we want content
$subRequest->setMethod('GET');
if ('HEAD' === $request->getMethod()) {
$subRequest->setMethod('GET');
}
// add our cached last-modified validator
$subRequest->headers->set('if_modified_since', $entry->headers->get('Last-Modified'));
@@ -375,7 +370,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
// return the response and not the cache entry if the response is valid but not cached
$etag = $response->getEtag();
if ($etag && in_array($etag, $requestEtags) && !in_array($etag, $cachedEtags)) {
if ($etag && \in_array($etag, $requestEtags) && !\in_array($etag, $cachedEtags)) {
return $response;
}
@@ -401,12 +396,11 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
}
/**
* Forwards the Request to the backend and determines whether the response should be stored.
*
* This methods is triggered when the cache missed or a reload is required.
* Unconditionally fetches a fresh response from the backend and
* stores it in the cache if is cacheable.
*
* @param Request $request A Request instance
* @param bool $catch whether to process exceptions
* @param bool $catch Whether to process exceptions
*
* @return Response A Response instance
*/
@@ -415,7 +409,9 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
$subRequest = clone $request;
// send no head requests because we want content
$subRequest->setMethod('GET');
if ('HEAD' === $request->getMethod()) {
$subRequest->setMethod('GET');
}
// avoid that the backend sends no content
$subRequest->headers->remove('if_modified_since');
@@ -433,6 +429,9 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
/**
* Forwards the Request to the backend and returns the Response.
*
* All backend requests (cache passes, fetches, cache validations)
* run through this method.
*
* @param Request $request A Request instance
* @param bool $catch Whether to catch exceptions or not
* @param Response $entry A Response instance (the stale entry if present, null otherwise)
@@ -445,30 +444,11 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
$this->surrogate->addSurrogateCapability($request);
}
// modify the X-Forwarded-For header if needed
$forwardedFor = $request->headers->get('X-Forwarded-For');
if ($forwardedFor) {
$request->headers->set('X-Forwarded-For', $forwardedFor.', '.$request->server->get('REMOTE_ADDR'));
} else {
$request->headers->set('X-Forwarded-For', $request->server->get('REMOTE_ADDR'));
}
// fix the client IP address by setting it to 127.0.0.1 as HttpCache
// is always called from the same process as the backend.
$request->server->set('REMOTE_ADDR', '127.0.0.1');
// make sure HttpCache is a trusted proxy
if (!in_array('127.0.0.1', $trustedProxies = Request::getTrustedProxies())) {
$trustedProxies[] = '127.0.0.1';
Request::setTrustedProxies($trustedProxies);
}
// always a "master" request (as the real master request can be in cache)
$response = $this->kernel->handle($request, HttpKernelInterface::MASTER_REQUEST, $catch);
// FIXME: we probably need to also catch exceptions if raw === true
$response = SubRequestHandler::handle($this->kernel, $request, HttpKernelInterface::MASTER_REQUEST, $catch);
// we don't implement the stale-if-error on Requests, which is nonetheless part of the RFC
if (null !== $entry && in_array($response->getStatusCode(), array(500, 502, 503, 504))) {
if (null !== $entry && \in_array($response->getStatusCode(), array(500, 502, 503, 504))) {
if (null === $age = $entry->headers->getCacheControlDirective('stale-if-error')) {
$age = $this->options['stale_if_error'];
}
@@ -480,6 +460,17 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
}
}
/*
RFC 7231 Sect. 7.1.1.2 says that a server that does not have a reasonably accurate
clock MUST NOT send a "Date" header, although it MUST send one in most other cases
except for 1xx or 5xx responses where it MAY do so.
Anyway, a client that received a message without a "Date" header MUST add it.
*/
if (!$response->headers->has('Date')) {
$response->setDate(\DateTime::createFromFormat('U', time()));
}
$this->processResponseBody($request, $response);
if ($this->isPrivateRequest($request) && !$response->headers->hasCacheControlDirective('public')) {
@@ -494,9 +485,6 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
/**
* Checks whether the cache entry is "fresh enough" to satisfy the Request.
*
* @param Request $request A Request instance
* @param Response $entry A Response instance
*
* @return bool true if the cache entry if fresh enough, false otherwise
*/
protected function isFreshEnough(Request $request, Response $entry)
@@ -515,9 +503,6 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
/**
* Locks a Request during the call to the backend.
*
* @param Request $request A Request instance
* @param Response $entry A Response instance
*
* @return bool true if the cache entry can be returned even if it is staled, false otherwise
*/
protected function lock(Request $request, Response $entry)
@@ -525,64 +510,48 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
// try to acquire a lock to call the backend
$lock = $this->store->lock($request);
if (true === $lock) {
// we have the lock, call the backend
return false;
}
// there is already another process calling the backend
if (true !== $lock) {
// check if we can serve the stale entry
if (null === $age = $entry->headers->getCacheControlDirective('stale-while-revalidate')) {
$age = $this->options['stale_while_revalidate'];
}
if (abs($entry->getTtl()) < $age) {
$this->record($request, 'stale-while-revalidate');
// server the stale response while there is a revalidation
return true;
}
// wait for the lock to be released
$wait = 0;
while ($this->store->isLocked($request) && $wait < 5000000) {
usleep(50000);
$wait += 50000;
}
if ($wait < 5000000) {
// replace the current entry with the fresh one
$new = $this->lookup($request);
$entry->headers = $new->headers;
$entry->setContent($new->getContent());
$entry->setStatusCode($new->getStatusCode());
$entry->setProtocolVersion($new->getProtocolVersion());
foreach ($new->headers->getCookies() as $cookie) {
$entry->headers->setCookie($cookie);
}
} else {
// backend is slow as hell, send a 503 response (to avoid the dog pile effect)
$entry->setStatusCode(503);
$entry->setContent('503 Service Unavailable');
$entry->headers->set('Retry-After', 10);
}
// May we serve a stale response?
if ($this->mayServeStaleWhileRevalidate($entry)) {
$this->record($request, 'stale-while-revalidate');
return true;
}
// we have the lock, call the backend
return false;
// wait for the lock to be released
if ($this->waitForLock($request)) {
// replace the current entry with the fresh one
$new = $this->lookup($request);
$entry->headers = $new->headers;
$entry->setContent($new->getContent());
$entry->setStatusCode($new->getStatusCode());
$entry->setProtocolVersion($new->getProtocolVersion());
foreach ($new->headers->getCookies() as $cookie) {
$entry->headers->setCookie($cookie);
}
} else {
// backend is slow as hell, send a 503 response (to avoid the dog pile effect)
$entry->setStatusCode(503);
$entry->setContent('503 Service Unavailable');
$entry->headers->set('Retry-After', 10);
}
return true;
}
/**
* Writes the Response to the cache.
*
* @param Request $request A Request instance
* @param Response $response A Response instance
*
* @throws \Exception
*/
protected function store(Request $request, Response $response)
{
if (!$response->headers->has('Date')) {
$response->setDate(\DateTime::createFromFormat('U', time()));
}
try {
$this->store->write($request, $response);
@@ -603,20 +572,9 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
/**
* Restores the Response body.
*
* @param Request $request A Request instance
* @param Response $response A Response instance
*/
private function restoreResponseBody(Request $request, Response $response)
{
if ($request->isMethod('HEAD') || 304 === $response->getStatusCode()) {
$response->setContent(null);
$response->headers->remove('X-Body-Eval');
$response->headers->remove('X-Body-File');
return;
}
if ($response->headers->has('X-Body-Eval')) {
ob_start();
@@ -629,10 +587,14 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
$response->setContent(ob_get_clean());
$response->headers->remove('X-Body-Eval');
if (!$response->headers->has('Transfer-Encoding')) {
$response->headers->set('Content-Length', strlen($response->getContent()));
$response->headers->set('Content-Length', \strlen($response->getContent()));
}
} elseif ($response->headers->has('X-Body-File')) {
$response->setContent(file_get_contents($response->headers->get('X-Body-File')));
// Response does not include possibly dynamic content (ESI, SSI), so we need
// not handle the content for HEAD requests
if (!$request->isMethod('HEAD')) {
$response->setContent(file_get_contents($response->headers->get('X-Body-File')));
}
} else {
return;
}
@@ -651,8 +613,6 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
* Checks if the Request includes authorization or other sensitive information
* that should cause the Response to be considered private by default.
*
* @param Request $request A Request instance
*
* @return bool true if the Request is private, false otherwise
*/
private function isPrivateRequest(Request $request)
@@ -661,7 +621,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
$key = strtolower(str_replace('HTTP_', '', $key));
if ('cookie' === $key) {
if (count($request->cookies->all())) {
if (\count($request->cookies->all())) {
return true;
}
} elseif ($request->headers->has($key)) {
@@ -679,11 +639,61 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
* @param string $event The event name
*/
private function record(Request $request, $event)
{
$this->traces[$this->getTraceKey($request)][] = $event;
}
/**
* Calculates the key we use in the "trace" array for a given request.
*
* @param Request $request
*
* @return string
*/
private function getTraceKey(Request $request)
{
$path = $request->getPathInfo();
if ($qs = $request->getQueryString()) {
$path .= '?'.$qs;
}
$this->traces[$request->getMethod().' '.$path][] = $event;
return $request->getMethod().' '.$path;
}
/**
* Checks whether the given (cached) response may be served as "stale" when a revalidation
* is currently in progress.
*
* @param Response $entry
*
* @return bool true when the stale response may be served, false otherwise
*/
private function mayServeStaleWhileRevalidate(Response $entry)
{
$timeout = $entry->headers->getCacheControlDirective('stale-while-revalidate');
if (null === $timeout) {
$timeout = $this->options['stale_while_revalidate'];
}
return abs($entry->getTtl()) < $timeout;
}
/**
* Waits for the store to release a locked entry.
*
* @param Request $request The request to wait for
*
* @return bool true if the lock was released before the internal timeout was hit; false if the wait timeout was exceeded
*/
private function waitForLock(Request $request)
{
$wait = 0;
while ($this->store->isLocked($request) && $wait < 100) {
usleep(50000);
++$wait;
}
return $wait < 100;
}
}