/**
* Handles an exception by showing an appropriate
* error page.
*/
public function handleError(Exception $e, $server = null, array &$headers = null)
{
$displayErrors = $this->pieCrust->isDebuggingEnabled() || $this->pieCrust->getConfig()->getValue('site/display_errors');
// If debugging is enabled, just display the error and exit.
if ($displayErrors) {
if ($e->getMessage() == '404') {
//TODO: set header?
piecrust_show_system_message('404');
return;
}
$errorMessage = self::formatException($e, true);
piecrust_show_system_message('error', $errorMessage);
return;
}
// First of all, check that we're not running
// some completely brand new and un-configured website.
if ($this->isEmptySetup()) {
piecrust_show_system_message('welcome');
return;
}
// Generic error message in case we don't have anything custom.
$errorMessage = "<p>We're sorry but something very wrong happened, and we don't know what. " . "We'll try to do better next time.</p>" . PHP_EOL;
// Get the URI to the custom error page, and the error code.
if ($e->getMessage() == '404') {
HttpHeaderHelper::setOrAddHeader(0, 404, $headers);
$errorPageUri = '_404';
} else {
HttpHeaderHelper::setOrAddHeader(0, 500, $headers);
$errorPageUri = '_error';
}
// Get the error page's info.
try {
$errorPageUriInfo = UriParser::parseUri($this->pieCrust, $errorPageUri, UriParser::PAGE_URI_REGULAR);
} catch (Exception $inner) {
// What the f**k.
piecrust_show_system_message('critical', $errorMessage);
return;
}
// Render the error page (either a custom one, or a generic one).
if ($errorPageUriInfo != null and is_file($errorPageUriInfo['path'])) {
// We have a custom error page. Show it, or display
// the "fatal error" page if even this doesn't work.
try {
$runner = new PieCrustRunner($this->pieCrust);
$runner->runUnsafe($errorPageUri, $server, null, $headers);
} catch (Exception $inner) {
// Well there's really something wrong.
piecrust_show_system_message('critical', $errorMessage);
}
} else {
// We don't have a custom error page. Just show the generic
// error page.
$errorMessage = self::formatException($e, false);
piecrust_show_system_message(substr($errorPageUri, 1), $errorMessage);
}
}
/**
* Runs PieCrust on the given URI with the given extra page rendering data,
* but without any error handling.
*/
public function runUnsafe($uri = null, array $server = null, $extraPageData = null, array &$headers = null)
{
// Create an execution context.
$executionContext = $this->pieCrust->getEnvironment()->getExecutionContext(true);
// Check the cache validity, and clean it automatically.
if ($this->pieCrust->isCachingEnabled()) {
$cacheInfo = new PieCrustCacheInfo($this->pieCrust);
$cacheValidity = $cacheInfo->getValidity(true);
$executionContext->isCacheValid = $cacheValidity['is_valid'];
$executionContext->wasCacheCleaned = $cacheValidity['was_cleaned'];
}
// Get the resource URI and corresponding physical path.
if ($server == null) {
$server = $_SERVER;
}
if ($uri == null) {
$uri = ServerHelper::getRequestUri($server, $this->pieCrust->getConfig()->getValueUnchecked('site/pretty_urls'));
}
// Do the heavy lifting.
$page = Page::createFromUri($this->pieCrust, $uri);
$executionContext->pushPage($page);
if ($extraPageData != null) {
$page->setExtraPageData($extraPageData);
}
$pageRenderer = new PageRenderer($page);
$output = $pageRenderer->get();
// Set or return the HTML headers.
HttpHeaderHelper::setOrAddHeaders(PageRenderer::getHeaders($page->getConfig()->getValue('content_type'), $server), $headers);
// Handle caching.
if (!$this->pieCrust->isDebuggingEnabled()) {
$hash = md5($output);
HttpHeaderHelper::setOrAddHeader('Etag', '"' . $hash . '"', $headers);
$clientHash = null;
if (isset($server['HTTP_IF_NONE_MATCH'])) {
$clientHash = $server['HTTP_IF_NONE_MATCH'];
}
if ($clientHash != null) {
$clientHash = trim($clientHash, '"');
if ($hash == $clientHash) {
HttpHeaderHelper::setOrAddHeader(0, 304, $headers);
HttpHeaderHelper::setOrAddHeader('Content-Length', '0', $headers);
return;
}
}
}
if ($this->pieCrust->isDebuggingEnabled()) {
HttpHeaderHelper::setOrAddHeader('Cache-Control', 'no-cache, must-revalidate', $headers);
} else {
$cacheTime = PageHelper::getConfigValue($page, 'cache_time', 'site');
if ($cacheTime) {
HttpHeaderHelper::setOrAddHeader('Cache-Control', 'public, max-age=' . $cacheTime, $headers);
}
}
// Output with or without GZip compression.
$gzipEnabled = ($this->pieCrust->getConfig()->getValueUnchecked('site/enable_gzip') === true and array_key_exists('HTTP_ACCEPT_ENCODING', $server) and strpos($server['HTTP_ACCEPT_ENCODING'], 'gzip') !== false);
if ($gzipEnabled) {
$zippedOutput = gzencode($output);
if ($zippedOutput === false) {
HttpHeaderHelper::setOrAddHeader('Content-Length', strlen($output), $headers);
echo $output;
} else {
HttpHeaderHelper::setOrAddHeader('Content-Encoding', 'gzip', $headers);
HttpHeaderHelper::setOrAddHeader('Content-Length', strlen($zippedOutput), $headers);
echo $zippedOutput;
}
} else {
HttpHeaderHelper::setOrAddHeader('Content-Length', strlen($output), $headers);
echo $output;
}
}
