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Edit File : Run.php \| Size : 14.63 KB
<?php /** * Whoops - php errors for cool kids * @author Filipe Dobreira <http://github.com/filp> / namespace Whoops; use InvalidArgumentException; use Throwable; use Whoops\Exception\ErrorException; use Whoops\Exception\Inspector; use Whoops\Handler\CallbackHandler; use Whoops\Handler\Handler; use Whoops\Handler\HandlerInterface; use Whoops\Util\Misc; use Whoops\Util\SystemFacade; final class Run implements RunInterface { /* * @var bool / private $isRegistered; /* * @var bool / private $allowQuit = true; /* * @var bool / private $sendOutput = true; /* * @var integer\|false / private $sendHttpCode = 500; /* * @var integer\|false / private $sendExitCode = 1; /* * @var HandlerInterface[] / private $handlerStack = []; /* * @var array * @psalm-var list<array{patterns: string, levels: int}> / private $silencedPatterns = []; /* * @var SystemFacade / private $system; /* * In certain scenarios, like in shutdown handler, we can not throw exceptions. * * @var bool / private $canThrowExceptions = true; public function __construct(SystemFacade $system = null) { $this->system = $system ?: new SystemFacade; } /* * Explicitly request your handler runs as the last of all currently registered handlers. * * @param callable\|HandlerInterface $handler * * @return Run / public function appendHandler($handler) { array_unshift($this->handlerStack, $this->resolveHandler($handler)); return $this; } /* * Explicitly request your handler runs as the first of all currently registered handlers. * * @param callable\|HandlerInterface $handler * * @return Run / public function prependHandler($handler) { return $this->pushHandler($handler); } /* * Register your handler as the last of all currently registered handlers (to be executed first). * Prefer using appendHandler and prependHandler for clarity. * * @param callable\|HandlerInterface $handler * * @return Run * * @throws InvalidArgumentException If argument is not callable or instance of HandlerInterface. / public function pushHandler($handler) { $this->handlerStack[] = $this->resolveHandler($handler); return $this; } /* * Removes and returns the last handler pushed to the handler stack. * * @see Run::removeFirstHandler(), Run::removeLastHandler() * * @return HandlerInterface\|null / public function popHandler() { return array_pop($this->handlerStack); } /* * Removes the first handler. * * @return void / public function removeFirstHandler() { array_pop($this->handlerStack); } /* * Removes the last handler. * * @return void / public function removeLastHandler() { array_shift($this->handlerStack); } /* * Returns an array with all handlers, in the order they were added to the stack. * * @return array / public function getHandlers() { return $this->handlerStack; } /* * Clears all handlers in the handlerStack, including the default PrettyPage handler. * * @return Run / public function clearHandlers() { $this->handlerStack = []; return $this; } /* * Registers this instance as an error handler. * * @return Run / public function register() { if (!$this->isRegistered) { // Workaround PHP bug 42098 // https://bugs.php.net/bug.php?id=42098 class_exists("\\Whoops\\Exception\\ErrorException"); class_exists("\\Whoops\\Exception\\FrameCollection"); class_exists("\\Whoops\\Exception\\Frame"); class_exists("\\Whoops\\Exception\\Inspector"); $this->system->setErrorHandler([$this, self::ERROR_HANDLER]); $this->system->setExceptionHandler([$this, self::EXCEPTION_HANDLER]); $this->system->registerShutdownFunction([$this, self::SHUTDOWN_HANDLER]); $this->isRegistered = true; } return $this; } /* * Unregisters all handlers registered by this Whoops\Run instance. * * @return Run / public function unregister() { if ($this->isRegistered) { $this->system->restoreExceptionHandler(); $this->system->restoreErrorHandler(); $this->isRegistered = false; } return $this; } /* * Should Whoops allow Handlers to force the script to quit? * * @param bool\|int $exit * * @return bool / public function allowQuit($exit = null) { if (func_num_args() == 0) { return $this->allowQuit; } return $this->allowQuit = (bool) $exit; } /* * Silence particular errors in particular files. * * @param array\|string $patterns List or a single regex pattern to match. * @param int $levels Defaults to E_STRICT \| E_DEPRECATED. * * @return Run / public function silenceErrorsInPaths($patterns, $levels = 10240) { $this->silencedPatterns = array_merge( $this->silencedPatterns, array_map( function ($pattern) use ($levels) { return [ "pattern" => $pattern, "levels" => $levels, ]; }, (array) $patterns ) ); return $this; } /* * Returns an array with silent errors in path configuration. * * @return array / public function getSilenceErrorsInPaths() { return $this->silencedPatterns; } /* * Should Whoops send HTTP error code to the browser if possible? * Whoops will by default send HTTP code 500, but you may wish to * use 502, 503, or another 5xx family code. * * @param bool\|int $code * * @return int\|false * * @throws InvalidArgumentException / public function sendHttpCode($code = null) { if (func_num_args() == 0) { return $this->sendHttpCode; } if (!$code) { return $this->sendHttpCode = false; } if ($code === true) { $code = 500; } if ($code < 400 \|\| 600 <= $code) { throw new InvalidArgumentException( "Invalid status code '$code', must be 4xx or 5xx" ); } return $this->sendHttpCode = $code; } /* * Should Whoops exit with a specific code on the CLI if possible? * Whoops will exit with 1 by default, but you can specify something else. * * @param int $code * * @return int * * @throws InvalidArgumentException / public function sendExitCode($code = null) { if (func_num_args() == 0) { return $this->sendExitCode; } if ($code < 0 \|\| 255 <= $code) { throw new InvalidArgumentException( "Invalid status code '$code', must be between 0 and 254" ); } return $this->sendExitCode = (int) $code; } /* * Should Whoops push output directly to the client? * If this is false, output will be returned by handleException. * * @param bool\|int $send * * @return bool / public function writeToOutput($send = null) { if (func_num_args() == 0) { return $this->sendOutput; } return $this->sendOutput = (bool) $send; } /* * Handles an exception, ultimately generating a Whoops error page. * * @param Throwable $exception * * @return string Output generated by handlers. / public function handleException($exception) { // Walk the registered handlers in the reverse order // they were registered, and pass off the exception $inspector = $this->getInspector($exception); // Capture output produced while handling the exception, // we might want to send it straight away to the client, // or return it silently. $this->system->startOutputBuffering(); // Just in case there are no handlers: $handlerResponse = null; $handlerContentType = null; try { foreach (array_reverse($this->handlerStack) as $handler) { $handler->setRun($this); $handler->setInspector($inspector); $handler->setException($exception); // The HandlerInterface does not require an Exception passed to handle() // and neither of our bundled handlers use it. // However, 3rd party handlers may have already relied on this parameter, // and removing it would be possibly breaking for users. $handlerResponse = $handler->handle($exception); // Collect the content type for possible sending in the headers. $handlerContentType = method_exists($handler, 'contentType') ? $handler->contentType() : null; if (in_array($handlerResponse, [Handler::LAST_HANDLER, Handler::QUIT])) { // The Handler has handled the exception in some way, and // wishes to quit execution (Handler::QUIT), or skip any // other handlers (Handler::LAST_HANDLER). If $this->allowQuit // is false, Handler::QUIT behaves like Handler::LAST_HANDLER break; } } $willQuit = $handlerResponse == Handler::QUIT && $this->allowQuit(); } finally { $output = $this->system->cleanOutputBuffer(); } // If we're allowed to, send output generated by handlers directly // to the output, otherwise, and if the script doesn't quit, return // it so that it may be used by the caller if ($this->writeToOutput()) { // @todo Might be able to clean this up a bit better if ($willQuit) { // Cleanup all other output buffers before sending our output: while ($this->system->getOutputBufferLevel() > 0) { $this->system->endOutputBuffering(); } // Send any headers if needed: if (Misc::canSendHeaders() && $handlerContentType) { header("Content-Type: {$handlerContentType}"); } } $this->writeToOutputNow($output); } if ($willQuit) { // HHVM fix for https://github.com/facebook/hhvm/issues/4055 $this->system->flushOutputBuffer(); $this->system->stopExecution( $this->sendExitCode() ); } return $output; } /* * Converts generic PHP errors to \ErrorException instances, before passing them off to be handled. * * This method MUST be compatible with set_error_handler. * * @param int $level * @param string $message * @param string\|null $file * @param int\|null $line * * @return bool * * @throws ErrorException / public function handleError($level, $message, $file = null, $line = null) { if ($level & $this->system->getErrorReportingLevel()) { foreach ($this->silencedPatterns as $entry) { $pathMatches = (bool) preg_match($entry["pattern"], $file); $levelMatches = $level & $entry["levels"]; if ($pathMatches && $levelMatches) { // Ignore the error, abort handling // See https://github.com/filp/whoops/issues/418 return true; } } // XXX we pass $level for the "code" param only for BC reasons. // see https://github.com/filp/whoops/issues/267 $exception = new ErrorException($message, /code/ $level, /severity/ $level, $file, $line); if ($this->canThrowExceptions) { throw $exception; } else { $this->handleException($exception); } // Do not propagate errors which were already handled by Whoops. return true; } // Propagate error to the next handler, allows error_get_last() to // work on silenced errors. return false; } /* * Special case to deal with Fatal errors and the like. * * @return void / public function handleShutdown() { // If we reached this step, we are in shutdown handler. // An exception thrown in a shutdown handler will not be propagated // to the exception handler. Pass that information along. $this->canThrowExceptions = false; $error = $this->system->getLastError(); if ($error && Misc::isLevelFatal($error['type'])) { // If there was a fatal error, // it was not handled in handleError yet. $this->allowQuit = false; $this->handleError( $error['type'], $error['message'], $error['file'], $error['line'] ); } } /* * @param Throwable $exception * * @return Inspector / private function getInspector($exception) { return new Inspector($exception); } /* * Resolves the giving handler. * * @param callable\|HandlerInterface $handler * * @return HandlerInterface * * @throws InvalidArgumentException / private function resolveHandler($handler) { if (is_callable($handler)) { $handler = new CallbackHandler($handler); } if (!$handler instanceof HandlerInterface) { throw new InvalidArgumentException( "Handler must be a callable, or instance of " . "Whoops\\Handler\\HandlerInterface" ); } return $handler; } /* * Echo something to the browser. * * @param string $output * * @return Run */ private function writeToOutputNow($output) { if ($this->sendHttpCode() && Misc::canSendHeaders()) { $this->system->setHttpResponseCode( $this->sendHttpCode() ); } echo $output; return $this; } } Back

Edit File : Run.php | Size : 14.63 KB

<?php
/**
 * Whoops - php errors for cool kids
 * @author Filipe Dobreira <http://github.com/filp>
 */

namespace Whoops;

use InvalidArgumentException;
use Throwable;
use Whoops\Exception\ErrorException;
use Whoops\Exception\Inspector;
use Whoops\Handler\CallbackHandler;
use Whoops\Handler\Handler;
use Whoops\Handler\HandlerInterface;
use Whoops\Util\Misc;
use Whoops\Util\SystemFacade;

final class Run implements RunInterface
{
    /**
     * @var bool
     */
    private $isRegistered;

/**
     * @var bool
     */
    private $allowQuit       = true;

/**
     * @var bool
     */
    private $sendOutput      = true;

/**
     * @var integer|false
     */
    private $sendHttpCode    = 500;

/**
     * @var integer|false
     */
    private $sendExitCode    = 1;

/**
     * @var HandlerInterface[]
     */
    private $handlerStack = [];

/**
     * @var array
     * @psalm-var list<array{patterns: string, levels: int}>
     */
    private $silencedPatterns = [];

/**
     * @var SystemFacade
     */
    private $system;

/**
     * In certain scenarios, like in shutdown handler, we can not throw exceptions.
     *
     * @var bool
     */
    private $canThrowExceptions = true;

public function __construct(SystemFacade $system = null)
    {
        $this->system = $system ?: new SystemFacade;
    }

/**
     * Explicitly request your handler runs as the last of all currently registered handlers.
     *
     * @param callable|HandlerInterface $handler
     *
     * @return Run
     */
    public function appendHandler($handler)
    {
        array_unshift($this->handlerStack, $this->resolveHandler($handler));
        return $this;
    }

/**
     * Explicitly request your handler runs as the first of all currently registered handlers.
     *
     * @param callable|HandlerInterface $handler
     *
     * @return Run
     */
    public function prependHandler($handler)
    {
        return $this->pushHandler($handler);
    }

/**
     * Register your handler as the last of all currently registered handlers (to be executed first).
     * Prefer using appendHandler and prependHandler for clarity.
     *
     * @param callable|HandlerInterface $handler
     *
     * @return Run
     *
     * @throws InvalidArgumentException If argument is not callable or instance of HandlerInterface.
     */
    public function pushHandler($handler)
    {
        $this->handlerStack[] = $this->resolveHandler($handler);
        return $this;
    }

/**
     * Removes and returns the last handler pushed to the handler stack.
     *
     * @see Run::removeFirstHandler(), Run::removeLastHandler()
     *
     * @return HandlerInterface|null
     */
    public function popHandler()
    {
        return array_pop($this->handlerStack);
    }

/**
     * Removes the first handler.
     *
     * @return void
     */
    public function removeFirstHandler()
    {
        array_pop($this->handlerStack);
    }

/**
     * Removes the last handler.
     *
     * @return void
     */
    public function removeLastHandler()
    {
        array_shift($this->handlerStack);
    }

/**
     * Returns an array with all handlers, in the order they were added to the stack.
     *
     * @return array
     */
    public function getHandlers()
    {
        return $this->handlerStack;
    }

/**
     * Clears all handlers in the handlerStack, including the default PrettyPage handler.
     *
     * @return Run
     */
    public function clearHandlers()
    {
        $this->handlerStack = [];
        return $this;
    }

/**
     * Registers this instance as an error handler.
     *
     * @return Run
     */
    public function register()
    {
        if (!$this->isRegistered) {
            // Workaround PHP bug 42098
            // https://bugs.php.net/bug.php?id=42098
            class_exists("\\Whoops\\Exception\\ErrorException");
            class_exists("\\Whoops\\Exception\\FrameCollection");
            class_exists("\\Whoops\\Exception\\Frame");
            class_exists("\\Whoops\\Exception\\Inspector");

$this->system->setErrorHandler([$this, self::ERROR_HANDLER]);
            $this->system->setExceptionHandler([$this, self::EXCEPTION_HANDLER]);
            $this->system->registerShutdownFunction([$this, self::SHUTDOWN_HANDLER]);

$this->isRegistered = true;
        }

return $this;
    }

/**
     * Unregisters all handlers registered by this Whoops\Run instance.
     *
     * @return Run
     */
    public function unregister()
    {
        if ($this->isRegistered) {
            $this->system->restoreExceptionHandler();
            $this->system->restoreErrorHandler();

$this->isRegistered = false;
        }

return $this;
    }

/**
     * Should Whoops allow Handlers to force the script to quit?
     *
     * @param bool|int $exit
     *
     * @return bool
     */
    public function allowQuit($exit = null)
    {
        if (func_num_args() == 0) {
            return $this->allowQuit;
        }

return $this->allowQuit = (bool) $exit;
    }

/**
     * Silence particular errors in particular files.
     *
     * @param array|string $patterns List or a single regex pattern to match.
     * @param int          $levels   Defaults to E_STRICT | E_DEPRECATED.
     *
     * @return Run
     */
    public function silenceErrorsInPaths($patterns, $levels = 10240)
    {
        $this->silencedPatterns = array_merge(
            $this->silencedPatterns,
            array_map(
                function ($pattern) use ($levels) {
                    return [
                        "pattern" => $pattern,
                        "levels" => $levels,
                    ];
                },
                (array) $patterns
            )
        );

return $this;
    }

/**
     * Returns an array with silent errors in path configuration.
     *
     * @return array
     */
    public function getSilenceErrorsInPaths()
    {
        return $this->silencedPatterns;
    }

/**
     * Should Whoops send HTTP error code to the browser if possible?
     * Whoops will by default send HTTP code 500, but you may wish to
     * use 502, 503, or another 5xx family code.
     *
     * @param bool|int $code
     *
     * @return int|false
     *
     * @throws InvalidArgumentException
     */
    public function sendHttpCode($code = null)
    {
        if (func_num_args() == 0) {
            return $this->sendHttpCode;
        }

if (!$code) {
            return $this->sendHttpCode = false;
        }

if ($code === true) {
            $code = 500;
        }

if ($code < 400 || 600 <= $code) {
            throw new InvalidArgumentException(
                "Invalid status code '$code', must be 4xx or 5xx"
            );
        }

return $this->sendHttpCode = $code;
    }

/**
     * Should Whoops exit with a specific code on the CLI if possible?
     * Whoops will exit with 1 by default, but you can specify something else.
     *
     * @param int $code
     *
     * @return int
     *
     * @throws InvalidArgumentException
     */
    public function sendExitCode($code = null)
    {
        if (func_num_args() == 0) {
            return $this->sendExitCode;
        }

if ($code < 0 || 255 <= $code) {
            throw new InvalidArgumentException(
                "Invalid status code '$code', must be between 0 and 254"
            );
        }

return $this->sendExitCode = (int) $code;
    }

/**
     * Should Whoops push output directly to the client?
     * If this is false, output will be returned by handleException.
     *
     * @param bool|int $send
     *
     * @return bool
     */
    public function writeToOutput($send = null)
    {
        if (func_num_args() == 0) {
            return $this->sendOutput;
        }

return $this->sendOutput = (bool) $send;
    }

/**
     * Handles an exception, ultimately generating a Whoops error page.
     *
     * @param Throwable $exception
     *
     * @return string Output generated by handlers.
     */
    public function handleException($exception)
    {
        // Walk the registered handlers in the reverse order
        // they were registered, and pass off the exception
        $inspector = $this->getInspector($exception);

// Capture output produced while handling the exception,
        // we might want to send it straight away to the client,
        // or return it silently.
        $this->system->startOutputBuffering();

// Just in case there are no handlers:
        $handlerResponse = null;
        $handlerContentType = null;

try {
            foreach (array_reverse($this->handlerStack) as $handler) {
                $handler->setRun($this);
                $handler->setInspector($inspector);
                $handler->setException($exception);

// The HandlerInterface does not require an Exception passed to handle()
                // and neither of our bundled handlers use it.
                // However, 3rd party handlers may have already relied on this parameter,
                // and removing it would be possibly breaking for users.
                $handlerResponse = $handler->handle($exception);

// Collect the content type for possible sending in the headers.
                $handlerContentType = method_exists($handler, 'contentType') ? $handler->contentType() : null;

if (in_array($handlerResponse, [Handler::LAST_HANDLER, Handler::QUIT])) {
                    // The Handler has handled the exception in some way, and
                    // wishes to quit execution (Handler::QUIT), or skip any
                    // other handlers (Handler::LAST_HANDLER). If $this->allowQuit
                    // is false, Handler::QUIT behaves like Handler::LAST_HANDLER
                    break;
                }
            }

$willQuit = $handlerResponse == Handler::QUIT && $this->allowQuit();
        } finally {
            $output = $this->system->cleanOutputBuffer();
        }

// If we're allowed to, send output generated by handlers directly
        // to the output, otherwise, and if the script doesn't quit, return
        // it so that it may be used by the caller
        if ($this->writeToOutput()) {
            // @todo Might be able to clean this up a bit better
            if ($willQuit) {
                // Cleanup all other output buffers before sending our output:
                while ($this->system->getOutputBufferLevel() > 0) {
                    $this->system->endOutputBuffering();
                }

// Send any headers if needed:
                if (Misc::canSendHeaders() && $handlerContentType) {
                    header("Content-Type: {$handlerContentType}");
                }
            }

$this->writeToOutputNow($output);
        }

if ($willQuit) {
            // HHVM fix for https://github.com/facebook/hhvm/issues/4055
            $this->system->flushOutputBuffer();

$this->system->stopExecution(
                $this->sendExitCode()
            );
        }

return $output;
    }

/**
     * Converts generic PHP errors to \ErrorException instances, before passing them off to be handled.
     *
     * This method MUST be compatible with set_error_handler.
     *
     * @param int         $level
     * @param string      $message
     * @param string|null $file
     * @param int|null    $line
     *
     * @return bool
     *
     * @throws ErrorException
     */
    public function handleError($level, $message, $file = null, $line = null)
    {
        if ($level & $this->system->getErrorReportingLevel()) {
            foreach ($this->silencedPatterns as $entry) {
                $pathMatches = (bool) preg_match($entry["pattern"], $file);
                $levelMatches = $level & $entry["levels"];
                if ($pathMatches && $levelMatches) {
                    // Ignore the error, abort handling
                    // See https://github.com/filp/whoops/issues/418
                    return true;
                }
            }

// XXX we pass $level for the "code" param only for BC reasons.
            // see https://github.com/filp/whoops/issues/267
            $exception = new ErrorException($message, /*code*/ $level, /*severity*/ $level, $file, $line);
            if ($this->canThrowExceptions) {
                throw $exception;
            } else {
                $this->handleException($exception);
            }
            // Do not propagate errors which were already handled by Whoops.
            return true;
        }

// Propagate error to the next handler, allows error_get_last() to
        // work on silenced errors.
        return false;
    }

/**
     * Special case to deal with Fatal errors and the like.
     *
     * @return void
     */
    public function handleShutdown()
    {
        // If we reached this step, we are in shutdown handler.
        // An exception thrown in a shutdown handler will not be propagated
        // to the exception handler. Pass that information along.
        $this->canThrowExceptions = false;

$error = $this->system->getLastError();
        if ($error && Misc::isLevelFatal($error['type'])) {
            // If there was a fatal error,
            // it was not handled in handleError yet.
            $this->allowQuit = false;
            $this->handleError(
                $error['type'],
                $error['message'],
                $error['file'],
                $error['line']
            );
        }
    }

/**
     * @param Throwable $exception
     *
     * @return Inspector
     */
    private function getInspector($exception)
    {
        return new Inspector($exception);
    }

/**
     * Resolves the giving handler.
     *
     * @param callable|HandlerInterface $handler
     *
     * @return HandlerInterface
     *
     * @throws InvalidArgumentException
     */
    private function resolveHandler($handler)
    {
        if (is_callable($handler)) {
            $handler = new CallbackHandler($handler);
        }

if (!$handler instanceof HandlerInterface) {
            throw new InvalidArgumentException(
                "Handler must be a callable, or instance of "
                . "Whoops\\Handler\\HandlerInterface"
            );
        }

return $handler;
    }

/**
     * Echo something to the browser.
     *
     * @param string $output
     *
     * @return Run
     */
    private function writeToOutputNow($output)
    {
        if ($this->sendHttpCode() && Misc::canSendHeaders()) {
            $this->system->setHttpResponseCode(
                $this->sendHttpCode()
            );
        }

echo $output;

return $this;
    }
}

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