Файл: framework/dev/Debug.php
Строк: 644
<?php
/**
* Supports debugging and core error handling.
*
* Attaches custom methods to the default error handling hooks
* in PHP. Currently, two levels of error are supported:
*
* - Notice
* - Warning
* - Error
*
* Uncaught exceptions are currently passed to the debug
* reporter as standard PHP errors.
*
* Errors handled by this class are passed along to {@link SS_Log}.
* For configuration information, see the {@link SS_Log}
* class documentation.
*
* @todo add support for user defined config: Debug::die_on_notice(true | false)
* @todo better way of figuring out the error context to display in highlighted source
*
* @package framework
* @subpackage dev
*/
class Debug {
/**
* @config
* @var String indicating the file where errors are logged.
* Filename is relative to the site root.
* The named file will have a terse log sent to it, and the full log (an
* encoded file containing backtraces and things) will go to a file of a similar
* name, but with the suffix ".full" added.
*/
private static $log_errors_to = null;
/**
* @config
* @var string The header of the message shown to users on the live site when a fatal error occurs.
*/
private static $friendly_error_header = 'There has been an error';
/**
* @config
* @var string The body of the message shown to users on the live site when a fatal error occurs.
*/
private static $friendly_error_detail = 'The website server has not been able to respond to your request.';
/**
* Show the contents of val in a debug-friendly way.
* Debug::show() is intended to be equivalent to dprintr()
*/
public static function show($val, $showHeader = true) {
if(!Director::isLive()) {
if($showHeader) {
$caller = Debug::caller();
if(Director::is_ajax() || Director::is_cli())
echo "Debug ($caller[class]$caller[type]$caller[function]() in " . basename($caller['file'])
. ":$caller[line])n";
else
echo "<div style="background-color: white; text-align: left;">n<hr>n"
. "<h3>Debug <span style="font-size: 65%">($caller[class]$caller[type]$caller[function]()"
. " nin " . basename($caller['file']) . ":$caller[line])</span>n</h3>n";
}
echo Debug::text($val);
if(!Director::is_ajax() && !Director::is_cli()) echo "</div>";
else echo "nn";
}
}
/**
* Returns the caller for a specific method
*
* @return array
*/
public static function caller() {
$bt = debug_backtrace();
$caller = $bt[2];
$caller['line'] = $bt[1]['line'];
$caller['file'] = $bt[1]['file'];
if(!isset($caller['class'])) $caller['class'] = '';
if(!isset($caller['type'])) $caller['type'] = '';
return $caller;
}
/**
* Close out the show dumper
*
* @param mixed $val
*/
public static function endshow($val) {
if(!Director::isLive()) {
$caller = Debug::caller();
echo "<hr>n<h3>Debug n<span style="font-size: 65%">($caller[class]$caller[type]$caller[function]()"
. " nin " . basename($caller['file']) . ":$caller[line])</span>n</h3>n";
echo Debug::text($val);
die();
}
}
/**
* Quick dump of a variable.
*
* @param mixed $val
*/
public static function dump($val) {
self::create_debug_view()->writeVariable($val, self::caller());
}
/**
* ??
*
* @param unknown_type $val
* @return unknown
*/
public static function text($val) {
if(is_object($val)) {
if(method_exists($val, 'hasMethod')) {
$hasDebugMethod = $val->hasMethod('debug');
} else {
$hasDebugMethod = method_exists($val, 'debug');
}
if($hasDebugMethod) {
return $val->debug();
}
}
if(is_array($val)) {
$result = "<ul>n";
foreach($val as $k => $v) {
$result .= "<li>$k = " . Debug::text($v) . "</li>n";
}
$val = $result . "</ul>n";
} else if (is_object($val)) {
$val = var_export($val, true);
} else if (is_bool($val)) {
$val = $val ? 'true' : 'false';
$val = '(bool) ' . $val;
} else {
if(!Director::is_cli() && !Director::is_ajax()) {
$val = "<pre style="font-family: Courier new">" . htmlentities($val, ENT_COMPAT, 'UTF-8')
. "</pre>n";
}
}
return $val;
}
/**
* Show a debugging message
*/
public static function message($message, $showHeader = true) {
if(!Director::isLive()) {
$caller = Debug::caller();
$file = basename($caller['file']);
if(Director::is_cli()) {
if($showHeader) echo "Debug (line $caller[line] of $file):n ";
echo $message . "n";
} else {
echo "<p class="message warning">n";
if($showHeader) echo "<b>Debug (line $caller[line] of $file):</b>n ";
echo Convert::raw2xml($message) . "</p>n";
}
}
}
// Keep track of how many headers have been sent
private static $headerCount = 0;
/**
* Send a debug message in an HTTP header. Only works if you are
* on Dev, and headers have not yet been sent.
*
* @param string $msg
* @param string $prefix (optional)
* @return void
*/
public static function header($msg, $prefix = null) {
if (Director::isDev() && !headers_sent()) {
self::$headerCount++;
header('SS-'.self::$headerCount.($prefix?'-'.$prefix:'').': '.$msg);
}
}
/**
* Log to a standard text file output.
*
* @param $message string to output
*/
public static function log($message) {
if (defined('BASE_PATH')) {
$path = BASE_PATH;
}
else {
$path = dirname(__FILE__) . '/../..';
}
$file = $path . '/debug.log';
$now = date('r');
$content = "nn== $now ==n$messagen";
file_put_contents($file, $content, FILE_APPEND);
}
/**
* Load error handlers into environment.
* Caution: The error levels default to E_ALL is the site is in dev-mode (set in main.php).
*/
public static function loadErrorHandlers() {
set_error_handler('errorHandler', error_reporting());
set_exception_handler('exceptionHandler');
}
public static function noticeHandler($errno, $errstr, $errfile, $errline, $errcontext) {
if(error_reporting() == 0) return;
ini_set('display_errors', 0);
// Send out the error details to the logger for writing
SS_Log::log(
array(
'errno' => $errno,
'errstr' => $errstr,
'errfile' => $errfile,
'errline' => $errline,
'errcontext' => $errcontext
),
SS_Log::NOTICE
);
if(Director::isDev()) {
return self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Notice");
} else {
return false;
}
}
/**
* Handle a non-fatal warning error thrown by PHP interpreter.
*
* @param unknown_type $errno
* @param unknown_type $errstr
* @param unknown_type $errfile
* @param unknown_type $errline
* @param unknown_type $errcontext
*/
public static function warningHandler($errno, $errstr, $errfile, $errline, $errcontext) {
if(error_reporting() == 0) return;
ini_set('display_errors', 0);
// Send out the error details to the logger for writing
SS_Log::log(
array(
'errno' => $errno,
'errstr' => $errstr,
'errfile' => $errfile,
'errline' => $errline,
'errcontext' => $errcontext
),
SS_Log::WARN
);
if(Director::isDev()) {
return self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Warning");
} else {
return false;
}
}
/**
* Handle a fatal error, depending on the mode of the site (ie: Dev, Test, or Live).
*
* Runtime execution dies immediately once the error is generated.
*
* @param unknown_type $errno
* @param unknown_type $errstr
* @param unknown_type $errfile
* @param unknown_type $errline
* @param unknown_type $errcontext
*/
public static function fatalHandler($errno, $errstr, $errfile, $errline, $errcontext) {
ini_set('display_errors', 0);
// Send out the error details to the logger for writing
SS_Log::log(
array(
'errno' => $errno,
'errstr' => $errstr,
'errfile' => $errfile,
'errline' => $errline,
'errcontext' => $errcontext
),
SS_Log::ERR
);
if(Director::isDev() || Director::is_cli()) {
self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Error");
} else {
self::friendlyError();
}
return false;
}
/**
* Render a user-facing error page, using the default HTML error template
* rendered by {@link ErrorPage} if it exists. Doesn't use the standard {@link SS_HTTPResponse} class
* the keep dependencies minimal.
*
* @uses ErrorPage
*
* @param int $statusCode HTTP Status Code (Default: 500)
* @param string $friendlyErrorMessage User-focused error message. Should not contain code pointers
* or "tech-speak". Used in the HTTP Header and ajax responses.
* @param string $friendlyErrorDetail Detailed user-focused message. Is just used if no {@link ErrorPage} is found
* for this specific status code.
* @return string HTML error message for non-ajax requests, plaintext for ajax-request.
*/
public static function friendlyError($statusCode=500, $friendlyErrorMessage=null, $friendlyErrorDetail=null) {
if(!$friendlyErrorMessage) {
$friendlyErrorMessage = Config::inst()->get('Debug', 'friendly_error_header');
}
if(!$friendlyErrorDetail) {
$friendlyErrorDetail = Config::inst()->get('Debug', 'friendly_error_detail');
}
if(!headers_sent()) {
// Ensure the error message complies with the HTTP 1.1 spec
$msg = strip_tags(str_replace(array("n", "r"), '', $friendlyErrorMessage));
if(Controller::has_curr()) {
$response = Controller::curr()->getResponse();
$response->setStatusCode($statusCode, $msg);
} else {
header($_SERVER['SERVER_PROTOCOL'] . " $statusCode $msg");
}
}
if(Director::is_ajax()) {
echo $friendlyErrorMessage;
} else {
if(class_exists('ErrorPage')){
$errorFilePath = ErrorPage::get_filepath_for_errorcode(
$statusCode,
class_exists('Translatable') ? Translatable::get_current_locale() : null
);
if(file_exists($errorFilePath)) {
$content = file_get_contents($errorFilePath);
if(!headers_sent()) header('Content-Type: text/html');
// $BaseURL is left dynamic in error-###.html, so that multi-domain sites don't get broken
echo str_replace('$BaseURL', Director::absoluteBaseURL(), $content);
}
} else {
$renderer = new DebugView();
$renderer->writeHeader();
$renderer->writeInfo("Website Error", $friendlyErrorMessage, $friendlyErrorDetail);
if(Email::config()->admin_email) {
$mailto = Email::obfuscate(Email::config()->admin_email);
$renderer->writeParagraph('Contact an administrator: ' . $mailto . '');
}
$renderer->writeFooter();
}
}
return false;
}
/**
* Create an instance of an appropriate DebugView object.
*
* @return DebugView
*/
public static function create_debug_view() {
$service = Director::is_cli() || Director::is_ajax()
? 'CliDebugView'
: 'DebugView';
return Injector::inst()->get($service);
}
/**
* Render a developer facing error page, showing the stack trace and details
* of the code where the error occured.
*
* @param unknown_type $errno
* @param unknown_type $errstr
* @param unknown_type $errfile
* @param unknown_type $errline
* @param unknown_type $errcontext
*/
public static function showError($errno, $errstr, $errfile, $errline, $errcontext, $errtype) {
if(!headers_sent()) {
$errText = "$errtype at line $errline of $errfile";
$errText = str_replace(array("n","r")," ",$errText);
if(!headers_sent()) header($_SERVER['SERVER_PROTOCOL'] . " 500 $errText");
// if error is displayed through ajax with CliDebugView, use plaintext output
if(Director::is_ajax()) {
header('Content-Type: text/plain');
}
}
$reporter = self::create_debug_view();
// Coupling alert: This relies on knowledge of how the director gets its URL, it could be improved.
$httpRequest = null;
if(isset($_SERVER['REQUEST_URI'])) {
$httpRequest = $_SERVER['REQUEST_URI'];
} elseif(isset($_REQUEST['url'])) {
$httpRequest = $_REQUEST['url'];
}
if(isset($_SERVER['REQUEST_METHOD'])) $httpRequest = $_SERVER['REQUEST_METHOD'] . ' ' . $httpRequest;
$reporter->writeHeader($httpRequest);
$reporter->writeError($httpRequest, $errno, $errstr, $errfile, $errline, $errcontext);
if(file_exists($errfile)) {
$lines = file($errfile);
// Make the array 1-based
array_unshift($lines,"");
unset($lines[0]);
$offset = $errline-10;
$lines = array_slice($lines, $offset, 16, true);
$reporter->writeSourceFragment($lines, $errline);
}
$reporter->writeTrace(($errcontext ? $errcontext : debug_backtrace()));
$reporter->writeFooter();
return false;
}
/**
* Utility method to render a snippet of PHP source code, from selected file
* and highlighting the given line number.
*
* @param string $errfile
* @param int $errline
*/
public static function showLines($errfile, $errline) {
$lines = file($errfile);
$offset = $errline-10;
$lines = array_slice($lines, $offset, 16);
echo '<pre>';
$offset++;
foreach($lines as $line) {
$line = htmlentities($line, ENT_COMPAT, 'UTF-8');
if ($offset == $errline) {
echo "<span>$offset</span> <span class="error">$line</span>";
} else {
echo "<span>$offset</span> $line";
}
$offset++;
}
echo '</pre>';
}
/**
* Check if the user has permissions to run URL debug tools,
* else redirect them to log in.
*/
public static function require_developer_login() {
if(Director::isDev()) {
return;
}
if(isset($_SESSION['loggedInAs'])) {
// We have to do some raw SQL here, because this method is called in Object::defineMethods().
// This means we have to be careful about what objects we create, as we don't want Object::defineMethods()
// being called again.
// This basically calls Permission::checkMember($_SESSION['loggedInAs'], 'ADMIN');
// @TODO - Rewrite safely using DataList::filter
$memberID = $_SESSION['loggedInAs'];
$permission = DB::prepared_query('
SELECT "ID" FROM "Permission"
INNER JOIN "Group_Members" ON "Permission"."GroupID" = "Group_Members"."GroupID"
WHERE "Permission"."Code" = ?
AND "Permission"."Type" = ?
AND "Group_Members"."MemberID" = ?',
array(
'ADMIN', // Code
Permission::GRANT_PERMISSION, // Type
$memberID // MemberID
)
)->value();
if($permission) return;
}
// This basically does the same as
// Security::permissionFailure(null, "You need to login with developer access to make use of debugging tools.")
// We have to do this because of how early this method is called in execution.
$_SESSION['Security']['Message']['message']
= "You need to login with developer access to make use of debugging tools.";
$_SESSION['Security']['Message']['type'] = 'warning';
$_SESSION['BackURL'] = $_SERVER['REQUEST_URI'];
header($_SERVER['SERVER_PROTOCOL'] . " 302 Found");
header("Location: " . Director::baseURL() . Security::login_url());
die();
}
}
/**
* Generic callback, to catch uncaught exceptions when they bubble up to the top of the call chain.
*
* @ignore
* @param Exception $exception
*/
function exceptionHandler($exception) {
$errno = E_USER_ERROR;
$type = get_class($exception);
$message = "Uncaught " . $type . ": " . $exception->getMessage();
$file = $exception->getFile();
$line = $exception->getLine();
$context = $exception->getTrace();
Debug::fatalHandler($errno, $message, $file, $line, $context);
exit(1);
}
/**
* Generic callback to catch standard PHP runtime errors thrown by the interpreter
* or manually triggered with the user_error function. Any unknown error codes are treated as
* fatal errors.
* Caution: The error levels default to E_ALL if the site is in dev-mode (set in main.php).
*
* @ignore
* @param int $errno
* @param string $errstr
* @param string $errfile
* @param int $errline
*/
function errorHandler($errno, $errstr, $errfile, $errline) {
switch($errno) {
case E_NOTICE:
case E_USER_NOTICE:
case E_DEPRECATED:
case E_USER_DEPRECATED:
case E_STRICT:
return Debug::noticeHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
case E_WARNING:
case E_CORE_WARNING:
case E_USER_WARNING:
case E_RECOVERABLE_ERROR:
return Debug::warningHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
case E_ERROR:
case E_CORE_ERROR:
case E_USER_ERROR:
default:
Debug::fatalHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
exit(1);
}
}