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: /mnt/lmsestudio-instance-vol002/lms_698bf930e912/vendor/symfony/debug/ [ drwxr-xr-x ]
name : ExceptionHandler.php <?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Debug; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\Debug\Exception\FlattenException; use Symfony\Component\Debug\Exception\OutOfMemoryException; /** * ExceptionHandler converts an exception to a Response object. * * It is mostly useful in debug mode to replace the default PHP/XDebug * output with something prettier and more useful. * * As this class is mainly used during Kernel boot, where nothing is yet * available, the Response content is always HTML. * * @author Fabien Potencier <fabien@symfony.com> * @author Nicolas Grekas <p@tchwork.com> */ class ExceptionHandler { private $debug; private $charset; private $handler; private $caughtBuffer; private $caughtLength; private $fileLinkFormat; public function __construct($debug = true, $charset = null, $fileLinkFormat = null) { if (false !== strpos($charset, '%')) { // Swap $charset and $fileLinkFormat for BC reasons $pivot = $fileLinkFormat; $fileLinkFormat = $charset; $charset = $pivot; } $this->debug = $debug; $this->charset = $charset ?: ini_get('default_charset') ?: 'UTF-8'; $this->fileLinkFormat = $fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format'); } /** * Registers the exception handler. * * @param bool $debug Enable/disable debug mode, where the stack trace is displayed * @param string|null $charset The charset used by exception messages * @param string|null $fileLinkFormat The IDE link template * * @return static */ public static function register($debug = true, $charset = null, $fileLinkFormat = null) { $handler = new static($debug, $charset, $fileLinkFormat); $prev = set_exception_handler(array($handler, 'handle')); if (is_array($prev) && $prev[0] instanceof ErrorHandler) { restore_exception_handler(); $prev[0]->setExceptionHandler(array($handler, 'handle')); } return $handler; } /** * Sets a user exception handler. * * @param callable $handler An handler that will be called on Exception * * @return callable|null The previous exception handler if any */ public function setHandler($handler) { if (null !== $handler && !is_callable($handler)) { throw new \LogicException('The exception handler must be a valid PHP callable.'); } $old = $this->handler; $this->handler = $handler; return $old; } /** * Sets the format for links to source files. * * @param string $format The format for links to source files * * @return string The previous file link format */ public function setFileLinkFormat($format) { $old = $this->fileLinkFormat; $this->fileLinkFormat = $format; return $old; } /** * Sends a response for the given Exception. * * To be as fail-safe as possible, the exception is first handled * by our simple exception handler, then by the user exception handler. * The latter takes precedence and any output from the former is cancelled, * if and only if nothing bad happens in this handling path. */ public function handle(\Exception $exception) { if (null === $this->handler || $exception instanceof OutOfMemoryException) { $this->failSafeHandle($exception); return; } $caughtLength = $this->caughtLength = 0; ob_start(array($this, 'catchOutput')); $this->failSafeHandle($exception); while (null === $this->caughtBuffer && ob_end_flush()) { // Empty loop, everything is in the condition } if (isset($this->caughtBuffer[0])) { ob_start(array($this, 'cleanOutput')); echo $this->caughtBuffer; $caughtLength = ob_get_length(); } $this->caughtBuffer = null; try { call_user_func($this->handler, $exception); $this->caughtLength = $caughtLength; } catch (\Exception $e) { if (!$caughtLength) { // All handlers failed. Let PHP handle that now. throw $exception; } } } /** * Sends a response for the given Exception. * * If you have the Symfony HttpFoundation component installed, * this method will use it to create and send the response. If not, * it will fallback to plain PHP functions. */ private function failSafeHandle(\Exception $exception) { if (class_exists('Symfony\Component\HttpFoundation\Response', false) && __CLASS__ !== get_class($this) && ($reflector = new \ReflectionMethod($this, 'createResponse')) && __CLASS__ !== $reflector->class ) { $response = $this->createResponse($exception); $response->sendHeaders(); $response->sendContent(); return; } $this->sendPhpResponse($exception); } /** * Sends the error associated with the given Exception as a plain PHP response. * * This method uses plain PHP functions like header() and echo to output * the response. * * @param \Exception|FlattenException $exception An \Exception instance */ public function sendPhpResponse($exception) { if (!$exception instanceof FlattenException) { $exception = FlattenException::create($exception); } if (!headers_sent()) { header(sprintf('HTTP/1.0 %s', $exception->getStatusCode())); foreach ($exception->getHeaders() as $name => $value) { header($name.': '.$value, false); } header('Content-Type: text/html; charset='.$this->charset); } echo $this->decorate($this->getContent($exception), $this->getStylesheet($exception)); } /** * Creates the error Response associated with the given Exception. * * @param \Exception|FlattenException $exception An \Exception instance * * @return Response A Response instance */ public function createResponse($exception) { if (!$exception instanceof FlattenException) { $exception = FlattenException::create($exception); } return Response::create($this->decorate($this->getContent($exception), $this->getStylesheet($exception)), $exception->getStatusCode(), $exception->getHeaders())->setCharset($this->charset); } /** * Gets the HTML content associated with the given exception. * * @return string The content as a string */ public function getContent(FlattenException $exception) { switch ($exception->getStatusCode()) { case 404: $title = 'Sorry, the page you are looking for could not be found.'; break; default: $title = 'Whoops, looks like something went wrong.'; } $content = ''; if ($this->debug) { try { $count = count($exception->getAllPrevious()); $total = $count + 1; foreach ($exception->toArray() as $position => $e) { $ind = $count - $position + 1; $class = $this->formatClass($e['class']); $message = nl2br($this->escapeHtml($e['message'])); $content .= sprintf(<<<'EOF' <h2 class="block_exception clear_fix"> <span class="exception_counter">%d/%d</span> <span class="exception_title">%s%s:</span> <span class="exception_message">%s</span> </h2> <div class="block"> <ol class="traces list_exception"> EOF , $ind, $total, $class, $this->formatPath($e['trace'][0]['file'], $e['trace'][0]['line']), $message); foreach ($e['trace'] as $trace) { $content .= ' <li>'; if ($trace['function']) { $content .= sprintf('at %s%s%s(%s)', $this->formatClass($trace['class']), $trace['type'], $trace['function'], $this->formatArgs($trace['args'])); } if (isset($trace['file']) && isset($trace['line'])) { $content .= $this->formatPath($trace['file'], $trace['line']); } $content .= "</li>\n"; } $content .= " </ol>\n</div>\n"; } } catch (\Exception $e) { // something nasty happened and we cannot throw an exception anymore if ($this->debug) { $title = sprintf('Exception thrown when handling an exception (%s: %s)', get_class($e), $this->escapeHtml($e->getMessage())); } else { $title = 'Whoops, looks like something went wrong.'; } } } return <<<EOF <div id="sf-resetcontent" class="sf-reset"> <h1>$title</h1> $content </div> EOF; } /** * Gets the stylesheet associated with the given exception. * * @return string The stylesheet as a string */ public function getStylesheet(FlattenException $exception) { return <<<'EOF' .sf-reset { font: 11px Verdana, Arial, sans-serif; color: #333 } .sf-reset .clear { clear:both; height:0; font-size:0; line-height:0; } .sf-reset .clear_fix:after { display:block; height:0; clear:both; visibility:hidden; } .sf-reset .clear_fix { display:inline-block; } .sf-reset * html .clear_fix { height:1%; } .sf-reset .clear_fix { display:block; } .sf-reset, .sf-reset .block { margin: auto } .sf-reset abbr { border-bottom: 1px dotted #000; cursor: help; } .sf-reset p { font-size:14px; line-height:20px; color:#868686; padding-bottom:20px } .sf-reset strong { font-weight:bold; } .sf-reset a { color:#6c6159; cursor: default; } .sf-reset a img { border:none; } .sf-reset a:hover { text-decoration:underline; } .sf-reset em { font-style:italic; } .sf-reset h1, .sf-reset h2 { font: 20px Georgia, "Times New Roman", Times, serif } .sf-reset .exception_counter { background-color: #fff; color: #333; padding: 6px; float: left; margin-right: 10px; float: left; display: block; } .sf-reset .exception_title { margin-left: 3em; margin-bottom: 0.7em; display: block; } .sf-reset .exception_message { margin-left: 3em; display: block; } .sf-reset .traces li { font-size:12px; padding: 2px 4px; list-style-type:decimal; margin-left:20px; } .sf-reset .block { background-color:#FFFFFF; padding:10px 28px; margin-bottom:20px; -webkit-border-bottom-right-radius: 16px; -webkit-border-bottom-left-radius: 16px; -moz-border-radius-bottomright: 16px; -moz-border-radius-bottomleft: 16px; border-bottom-right-radius: 16px; border-bottom-left-radius: 16px; border-bottom:1px solid #ccc; border-right:1px solid #ccc; border-left:1px solid #ccc; word-wrap: break-word; } .sf-reset .block_exception { background-color:#ddd; color: #333; padding:20px; -webkit-border-top-left-radius: 16px; -webkit-border-top-right-radius: 16px; -moz-border-radius-topleft: 16px; -moz-border-radius-topright: 16px; border-top-left-radius: 16px; border-top-right-radius: 16px; border-top:1px solid #ccc; border-right:1px solid #ccc; border-left:1px solid #ccc; overflow: hidden; word-wrap: break-word; } .sf-reset a { background:none; color:#868686; text-decoration:none; } .sf-reset a:hover { background:none; color:#313131; text-decoration:underline; } .sf-reset ol { padding: 10px 0; } .sf-reset h1 { background-color:#FFFFFF; padding: 15px 28px; margin-bottom: 20px; -webkit-border-radius: 10px; -moz-border-radius: 10px; border-radius: 10px; border: 1px solid #ccc; } EOF; } private function decorate($content, $css) { return <<<EOF <!DOCTYPE html> <html> <head> <meta charset="{$this->charset}" /> <meta name="robots" content="noindex,nofollow" /> <style> /* Copyright (c) 2010, Yahoo! Inc. All rights reserved. Code licensed under the BSD License: http://developer.yahoo.com/yui/license.html */ html{color:#000;background:#FFF;}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td{margin:0;padding:0;}table{border-collapse:collapse;border-spacing:0;}fieldset,img{border:0;}address,caption,cite,code,dfn,em,strong,th,var{font-style:normal;font-weight:normal;}li{list-style:none;}caption,th{text-align:left;}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal;}q:before,q:after{content:'';}abbr,acronym{border:0;font-variant:normal;}sup{vertical-align:text-top;}sub{vertical-align:text-bottom;}input,textarea,select{font-family:inherit;font-size:inherit;font-weight:inherit;}input,textarea,select{*font-size:100%;}legend{color:#000;} html { background: #eee; padding: 10px } img { border: 0; } #sf-resetcontent { width:970px; margin:0 auto; } $css </style> </head> <body> $content </body> </html> EOF; } private function formatClass($class) { $parts = explode('\\', $class); return sprintf('<abbr title="%s">%s</abbr>', $class, array_pop($parts)); } private function formatPath($path, $line) { $path = $this->escapeHtml($path); $file = preg_match('#[^/\\\\]*$#', $path, $file) ? $file[0] : $path; if ($linkFormat = $this->fileLinkFormat) { $link = strtr($this->escapeHtml($linkFormat), array('%f' => $path, '%l' => (int) $line)); return sprintf(' in <a href="%s" title="Go to source">%s line %d</a>', $link, $file, $line); } return sprintf(' in <a title="%s line %3$d" ondblclick="var f=this.innerHTML;this.innerHTML=this.title;this.title=f;">%s line %d</a>', $path, $file, $line); } /** * Formats an array as a string. * * @param array $args The argument array * * @return string */ private function formatArgs(array $args) { $result = array(); foreach ($args as $key => $item) { if ('object' === $item[0]) { $formattedValue = sprintf('<em>object</em>(%s)', $this->formatClass($item[1])); } elseif ('array' === $item[0]) { $formattedValue = sprintf('<em>array</em>(%s)', is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]); } elseif ('string' === $item[0]) { $formattedValue = sprintf("'%s'", $this->escapeHtml($item[1])); } elseif ('null' === $item[0]) { $formattedValue = '<em>null</em>'; } elseif ('boolean' === $item[0]) { $formattedValue = '<em>'.strtolower(var_export($item[1], true)).'</em>'; } elseif ('resource' === $item[0]) { $formattedValue = '<em>resource</em>'; } else { $formattedValue = str_replace("\n", '', var_export($this->escapeHtml((string) $item[1]), true)); } $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $this->escapeHtml($key), $formattedValue); } return implode(', ', $result); } /** * Returns an UTF-8 and HTML encoded string. * * @deprecated since version 2.7, to be removed in 3.0. */ protected static function utf8Htmlize($str) { @trigger_error('The '.__METHOD__.' method is deprecated since Symfony 2.7 and will be removed in 3.0.', E_USER_DEPRECATED); return htmlspecialchars($str, ENT_QUOTES | (\PHP_VERSION_ID >= 50400 ? ENT_SUBSTITUTE : 0), 'UTF-8'); } /** * HTML-encodes a string. */ private function escapeHtml($str) { return htmlspecialchars($str, ENT_QUOTES | (\PHP_VERSION_ID >= 50400 ? ENT_SUBSTITUTE : 0), $this->charset); } /** * @internal */ public function catchOutput($buffer) { $this->caughtBuffer = $buffer; return ''; } /** * @internal */ public function cleanOutput($buffer) { if ($this->caughtLength) { // use substr_replace() instead of substr() for mbstring overloading resistance $cleanBuffer = substr_replace($buffer, '', 0, $this->caughtLength); if (isset($cleanBuffer[0])) { $buffer = $cleanBuffer; } } return $buffer; } }