* * 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\Debug\Exception\FlattenException; use Symfony\Component\Debug\Exception\OutOfMemoryException; use Symfony\Component\HttpKernel\Debug\FileLinkFormatter; @trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.4, use "%s" instead.', ExceptionHandler::class, \Symfony\Component\ErrorHandler\ErrorHandler::class), E_USER_DEPRECATED); /** * 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 * @author Nicolas Grekas * * @final since Symfony 4.3 * * @deprecated since Symfony 4.4, use Symfony\Component\ErrorHandler\ErrorHandler instead. */ class ExceptionHandler { private const GHOST_ADDONS = [ '02-14' => self::GHOST_HEART, '02-29' => self::GHOST_PLUS, '10-18' => self::GHOST_GIFT, ]; private const GHOST_GIFT = 'M124.005 5.36c.396-.715 1.119-1.648-.124-1.873-.346-.177-.692-.492-1.038-.141-.769.303-1.435.728-.627 1.523.36.514.685 1.634 1.092 1.758.242-.417.47-.842.697-1.266zm-1.699 1.977c-.706-1.26-1.274-2.612-2.138-3.774-1.051-1.123-3.122-.622-3.593.825-.625 1.431.724 3.14 2.251 2.96 1.159.02 2.324.072 3.48-.011zm5.867.043c1.502-.202 2.365-2.092 1.51-3.347-.757-1.34-2.937-1.387-3.698-.025-.659 1.1-1.23 2.25-1.835 3.38 1.336.077 2.686.06 4.023-.008zm2.487 1.611c.512-.45 2.494-.981.993-1.409-.372-.105-.805-.59-1.14-.457-.726.902-1.842 1.432-3.007 1.376-.228.075-1.391-.114-1.077.1.822.47 1.623.979 2.474 1.395.595-.317 1.173-.667 1.757-1.005zm-11.696.255l1.314-.765c-1.338-.066-2.87.127-3.881-.95-.285-.319-.559-.684-.954-.282-.473.326-1.929.66-.808 1.058.976.576 1.945 1.167 2.946 1.701.476-.223.926-.503 1.383-.762zm6.416 2.846c.567-.456 1.942-.89 1.987-1.38-1.282-.737-2.527-1.56-3.87-2.183-.461-.175-.835.094-1.207.328-1.1.654-2.225 1.267-3.288 1.978 1.39.86 2.798 1.695 4.219 2.504.725-.407 1.44-.83 2.16-1.247zm5.692 1.423l1.765-1.114c-.005-1.244.015-2.488-.019-3.732a77.306 77.306 0 0 0-3.51 2.084c-.126 1.282-.062 2.586-.034 3.876.607-.358 1.2-.741 1.798-1.114zm-13.804-.784c.06-1.06.19-2.269-1.09-2.583-.807-.376-1.926-1.341-2.548-1.332-.02 1.195-.01 2.39-.011 3.585 1.192.744 2.364 1.524 3.582 2.226.119-.616.041-1.269.067-1.896zm8.541 4.105l2.117-1.336c-.003-1.284.05-2.57-.008-3.853-.776.223-1.662.91-2.48 1.337l-1.834 1.075c.012 1.37-.033 2.744.044 4.113.732-.427 1.443-.887 2.161-1.336zm-2.957-.72v-2.057c-1.416-.828-2.828-1.664-4.25-2.482-.078 1.311-.033 2.627-.045 3.94 1.416.887 2.817 1.798 4.25 2.655.057-.683.036-1.372.045-2.057zm8.255 2.755l1.731-1.153c-.024-1.218.06-2.453-.062-3.658-1.2.685-2.358 1.464-3.537 2.195.028 1.261-.058 2.536.072 3.786.609-.373 1.2-.777 1.796-1.17zm-13.851-.683l-.014-1.916c-1.193-.746-2.37-1.517-3.58-2.234-.076 1.224-.033 2.453-.044 3.679 1.203.796 2.392 1.614 3.61 2.385.048-.636.024-1.276.028-1.914zm8.584 4.199l2.102-1.396c-.002-1.298.024-2.596-.01-3.893-1.427.88-2.843 1.775-4.25 2.686-.158 1.253-.055 2.545-.056 3.811.437.266 1.553-.912 2.214-1.208zm-2.988-.556c-.085-.894.365-2.154-.773-2.5-1.146-.727-2.288-1.46-3.45-2.163-.17 1.228.008 2.508-.122 3.751a79.399 79.399 0 0 0 4.278 2.885c.117-.641.044-1.32.067-1.973zm-4.872-.236l-5.087-3.396c.002-3.493-.047-6.988.015-10.48.85-.524 1.753-.954 2.627-1.434-.564-1.616.25-3.58 1.887-4.184 1.372-.563 3.025-.055 3.9 1.13l1.906-.978 1.916.987c.915-1.086 2.483-1.706 3.842-1.097 1.631.573 2.52 2.532 1.936 4.145.88.497 1.837.886 2.644 1.492.036 3.473 0 6.946-.003 10.419-3.374 2.233-6.693 4.55-10.122 6.699-.997 0-1.858-1.083-2.783-1.522a735.316 735.316 0 0 1-2.678-1.781z'; private const GHOST_HEART = 'M125.914 8.305c3.036-8.71 14.933 0 0 11.2-14.932-11.2-3.036-19.91 0-11.2z'; private const GHOST_PLUS = 'M111.368 8.97h7.324V1.645h7.512v7.323h7.324v7.513h-7.324v7.323h-7.512v-7.323h-7.324z'; private $debug; private $charset; private $handler; private $caughtBuffer; private $caughtLength; private $fileLinkFormat; public function __construct(bool $debug = true, string $charset = null, $fileLinkFormat = null) { $this->debug = $debug; $this->charset = $charset ?: ini_get('default_charset') ?: 'UTF-8'; $this->fileLinkFormat = $fileLinkFormat; } /** * 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); $prev = set_exception_handler([$handler, 'handle']); if (\is_array($prev) && $prev[0] instanceof ErrorHandler) { restore_exception_handler(); $prev[0]->setExceptionHandler([$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(callable $handler = null) { $old = $this->handler; $this->handler = $handler; return $old; } /** * Sets the format for links to source files. * * @param string|FileLinkFormatter $fileLinkFormat The format for links to source files * * @return string The previous file link format */ public function setFileLinkFormat($fileLinkFormat) { $old = $this->fileLinkFormat; $this->fileLinkFormat = $fileLinkFormat; 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) { $this->sendPhpResponse($exception); return; } $caughtLength = $this->caughtLength = 0; ob_start(function ($buffer) { $this->caughtBuffer = $buffer; return ''; }); $this->sendPhpResponse($exception); while (null === $this->caughtBuffer && ob_end_flush()) { // Empty loop, everything is in the condition } if (isset($this->caughtBuffer[0])) { ob_start(function ($buffer) { if ($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; }); echo $this->caughtBuffer; $caughtLength = ob_get_length(); } $this->caughtBuffer = null; try { ($this->handler)($exception); $this->caughtLength = $caughtLength; } catch (\Exception $e) { if (!$caughtLength) { // All handlers failed. Let PHP handle that now. throw $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 \Throwable|FlattenException $exception A \Throwable or FlattenException instance */ public function sendPhpResponse($exception) { if ($exception instanceof \Throwable) { $exception = FlattenException::createFromThrowable($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)); } /** * Gets the full HTML content associated with the given exception. * * @param \Exception|FlattenException $exception An \Exception or FlattenException instance * * @return string The HTML content as a string */ public function getHtml($exception) { if (!$exception instanceof FlattenException) { $exception = FlattenException::create($exception); } return $this->decorate($this->getContent($exception), $this->getStylesheet($exception)); } /** * 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 = $this->debug ? $this->escapeHtml($exception->getMessage()) : 'Whoops, looks like something went wrong.'; } if (!$this->debug) { return <<

$title

EOF; } $content = ''; 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'
EOF , $ind, $total, $class, $message); foreach ($e['trace'] as $trace) { $content .= '\n"; } $content .= "\n

(%d/%d) %s

%s

'; 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 .= "
\n
\n"; } } catch (\Exception $e) { // something nasty happened and we cannot throw an exception anymore if ($this->debug) { $e = FlattenException::create($e); $title = sprintf('Exception thrown when handling an exception (%s: %s)', $e->getClass(), $this->escapeHtml($e->getMessage())); } else { $title = 'Whoops, looks like something went wrong.'; } } $symfonyGhostImageContents = $this->getSymfonyGhostAsSvg(); return <<

$title

$symfonyGhostImageContents
$content
EOF; } /** * Gets the stylesheet associated with the given exception. * * @return string The stylesheet as a string */ public function getStylesheet(FlattenException $exception) { if (!$this->debug) { return <<<'EOF' body { background-color: #fff; color: #222; font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; margin: 0; } .container { margin: 30px; max-width: 600px; } h1 { color: #dc3545; font-size: 24px; } EOF; } return <<<'EOF' body { background-color: #F9F9F9; color: #222; font: 14px/1.4 Helvetica, Arial, sans-serif; margin: 0; padding-bottom: 45px; } a { cursor: pointer; text-decoration: none; } a:hover { text-decoration: underline; } abbr[title] { border-bottom: none; cursor: help; text-decoration: none; } code, pre { font: 13px/1.5 Consolas, Monaco, Menlo, "Ubuntu Mono", "Liberation Mono", monospace; } table, tr, th, td { background: #FFF; border-collapse: collapse; vertical-align: top; } table { background: #FFF; border: 1px solid #E0E0E0; box-shadow: 0px 0px 1px rgba(128, 128, 128, .2); margin: 1em 0; width: 100%; } table th, table td { border: solid #E0E0E0; border-width: 1px 0; padding: 8px 10px; } table th { background-color: #E0E0E0; font-weight: bold; text-align: left; } .hidden-xs-down { display: none; } .block { display: block; } .break-long-words { -ms-word-break: break-all; word-break: break-all; word-break: break-word; -webkit-hyphens: auto; -moz-hyphens: auto; hyphens: auto; } .text-muted { color: #999; } .container { max-width: 1024px; margin: 0 auto; padding: 0 15px; } .container::after { content: ""; display: table; clear: both; } .exception-summary { background: #B0413E; border-bottom: 2px solid rgba(0, 0, 0, 0.1); border-top: 1px solid rgba(0, 0, 0, .3); flex: 0 0 auto; margin-bottom: 30px; } .exception-message-wrapper { display: flex; align-items: center; min-height: 70px; } .exception-message { flex-grow: 1; padding: 30px 0; } .exception-message, .exception-message a { color: #FFF; font-size: 21px; font-weight: 400; margin: 0; } .exception-message.long { font-size: 18px; } .exception-message a { border-bottom: 1px solid rgba(255, 255, 255, 0.5); font-size: inherit; text-decoration: none; } .exception-message a:hover { border-bottom-color: #ffffff; } .exception-illustration { flex-basis: 111px; flex-shrink: 0; height: 66px; margin-left: 15px; opacity: .7; } .trace + .trace { margin-top: 30px; } .trace-head .trace-class { color: #222; font-size: 18px; font-weight: bold; line-height: 1.3; margin: 0; position: relative; } .trace-message { font-size: 14px; font-weight: normal; margin: .5em 0 0; } .trace-file-path, .trace-file-path a { color: #222; margin-top: 3px; font-size: 13px; } .trace-class { color: #B0413E; } .trace-type { padding: 0 2px; } .trace-method { color: #B0413E; font-weight: bold; } .trace-arguments { color: #777; font-weight: normal; padding-left: 2px; } @media (min-width: 575px) { .hidden-xs-down { display: initial; } } EOF; } private function decorate(string $content, string $css): string { return << $content EOF; } private function formatClass(string $class): string { $parts = explode('\\', $class); return sprintf('%s', $class, array_pop($parts)); } private function formatPath(string $path, int $line): string { $file = $this->escapeHtml(preg_match('#[^/\\\\]*+$#', $path, $file) ? $file[0] : $path); $fmt = $this->fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format'); if (!$fmt) { return sprintf('in %s%s', $this->escapeHtml($path), $file, 0 < $line ? ' line '.$line : ''); } if (\is_string($fmt)) { $i = strpos($f = $fmt, '&', max(strrpos($f, '%f'), strrpos($f, '%l'))) ?: \strlen($f); $fmt = [substr($f, 0, $i)] + preg_split('/&([^>]++)>/', substr($f, $i), -1, PREG_SPLIT_DELIM_CAPTURE); for ($i = 1; isset($fmt[$i]); ++$i) { if (0 === strpos($path, $k = $fmt[$i++])) { $path = substr_replace($path, $fmt[$i], 0, \strlen($k)); break; } } $link = strtr($fmt[0], ['%f' => $path, '%l' => $line]); } else { try { $link = $fmt->format($path, $line); } catch (\Exception $e) { return sprintf('in %s%s', $this->escapeHtml($path), $file, 0 < $line ? ' line '.$line : ''); } } return sprintf('in %s%s', $this->escapeHtml($link), $file, 0 < $line ? ' line '.$line : ''); } /** * Formats an array as a string. */ private function formatArgs(array $args): string { $result = []; foreach ($args as $key => $item) { if ('object' === $item[0]) { $formattedValue = sprintf('object(%s)', $this->formatClass($item[1])); } elseif ('array' === $item[0]) { $formattedValue = sprintf('array(%s)', \is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]); } elseif ('null' === $item[0]) { $formattedValue = 'null'; } elseif ('boolean' === $item[0]) { $formattedValue = ''.strtolower(var_export($item[1], true)).''; } elseif ('resource' === $item[0]) { $formattedValue = 'resource'; } else { $formattedValue = str_replace("\n", '', $this->escapeHtml(var_export($item[1], true))); } $result[] = \is_int($key) ? $formattedValue : sprintf("'%s' => %s", $this->escapeHtml($key), $formattedValue); } return implode(', ', $result); } /** * HTML-encodes a string. */ private function escapeHtml(string $str): string { return htmlspecialchars($str, ENT_COMPAT | ENT_SUBSTITUTE, $this->charset); } private function getSymfonyGhostAsSvg(): string { return ''.$this->addElementToGhost().''; } private function addElementToGhost(): string { if (!isset(self::GHOST_ADDONS[date('m-d')])) { return ''; } return ''; } }