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mirror of https://github.com/silverstripe/silverstripe-framework synced 2024-10-22 14:05:37 +02:00
silverstripe-framework/dev/Backtrace.php
Ingo Schommer 3334eafcb1 API Marked statics private, use Config API instead ()
See "Static configuration properties are now immutable, you must use Config API." in the 3.1 change log for details.
2013-03-24 17:20:53 +01:00

192 lines
6.1 KiB
PHP

<?php
/**
* @package framework
* @subpackage dev
*/
class SS_Backtrace {
/**
* @var array Replaces all arguments with a '<filtered>' string,
* mostly for security reasons. Use string values for global functions,
* and array notation for class methods.
* PHP's debug_backtrace() doesn't allow to inspect the argument names,
* so all arguments of the provided functions will be filtered out.
*/
private static $ignore_function_args = array(
'mysql_connect',
'mssql_connect',
'pg_connect',
array('DB', 'connect'),
array('Security', 'check_default_admin'),
array('Security', 'encrypt_password'),
array('Security', 'setDefaultAdmin'),
array('DB', 'createDatabase'),
array('Member', 'checkPassword'),
array('Member', 'changePassword'),
array('MemberPassword', 'checkPassword'),
array('PasswordValidator', 'validate'),
array('PasswordEncryptor_PHPHash', 'encrypt'),
array('PasswordEncryptor_PHPHash', 'salt'),
array('PasswordEncryptor_LegacyPHPHash', 'encrypt'),
array('PasswordEncryptor_LegacyPHPHash', 'salt'),
array('PasswordEncryptor_MySQLPassword', 'encrypt'),
array('PasswordEncryptor_MySQLPassword', 'salt'),
array('PasswordEncryptor_MySQLOldPassword', 'encrypt'),
array('PasswordEncryptor_MySQLOldPassword', 'salt'),
array('PasswordEncryptor_Blowfish', 'encrypt'),
array('PasswordEncryptor_Blowfish', 'salt'),
);
/**
* Return debug_backtrace() results with functions filtered
* specific to the debugging system, and not the trace.
*
* @param null|array $ignoredFunctions If an array, filter these functions out of the trace
* @return array
*/
public static function filtered_backtrace($ignoredFunctions = null) {
return self::filter_backtrace(debug_backtrace(), $ignoredFunctions);
}
/**
* Filter a backtrace so that it doesn't show the calls to the
* debugging system, which is useless information.
*
* @param array $bt Backtrace to filter
* @param null|array $ignoredFunctions List of extra functions to filter out
* @return array
*/
public static function filter_backtrace($bt, $ignoredFunctions = null) {
$defaultIgnoredFunctions = array(
'SS_Log::log',
'SS_Backtrace::backtrace',
'SS_Backtrace::filtered_backtrace',
'Zend_Log_Writer_Abstract->write',
'Zend_Log->log',
'Zend_Log->__call',
'Zend_Log->err',
'DebugView->writeTrace',
'CliDebugView->writeTrace',
'Debug::emailError',
'Debug::warningHandler',
'Debug::noticeHandler',
'Debug::fatalHandler',
'errorHandler',
'Debug::showError',
'Debug::backtrace',
'exceptionHandler'
);
if($ignoredFunctions) foreach($ignoredFunctions as $ignoredFunction) {
$defaultIgnoredFunctions[] = $ignoredFunction;
}
while($bt && in_array(self::full_func_name($bt[0]), $defaultIgnoredFunctions)) {
array_shift($bt);
}
$ignoredArgs = Config::inst()->get('SS_Backtrace', 'ignore_function_args');
// Filter out arguments
foreach($bt as $i => $frame) {
$match = false;
if(@$bt[$i]['class']) {
foreach($ignoredArgs as $fnSpec) {
if(is_array($fnSpec) && $bt[$i]['class'] == $fnSpec[0] && $bt[$i]['function'] == $fnSpec[1]) {
$match = true;
}
}
} else {
if(in_array($bt[$i]['function'], $ignoredArgs)) $match = true;
}
if($match) {
foreach($bt[$i]['args'] as $j => $arg) $bt[$i]['args'][$j] = '<filtered>';
}
}
return $bt;
}
/**
* Render or return a backtrace from the given scope.
*
* @param unknown_type $returnVal
* @param unknown_type $ignoreAjax
* @return unknown
*/
public static function backtrace($returnVal = false, $ignoreAjax = false, $ignoredFunctions = null) {
$plainText = Director::is_cli() || (Director::is_ajax() && !$ignoreAjax);
$result = self::get_rendered_backtrace(debug_backtrace(), $plainText, $ignoredFunctions);
if($returnVal) {
return $result;
} else {
echo $result;
}
}
/**
* Return the full function name. If showArgs is set to true, a string representation of the arguments will be
* shown
*
* @param Object $item
* @param boolean $showArg
* @param Int $argCharLimit
* @return String
*/
public static function full_func_name($item, $showArgs = false, $argCharLimit = 10000) {
$funcName = '';
if(isset($item['class'])) $funcName .= $item['class'];
if(isset($item['type'])) $funcName .= $item['type'];
if(isset($item['function'])) $funcName .= $item['function'];
if($showArgs && isset($item['args'])) {
$args = array();
foreach($item['args'] as $arg) {
if(!is_object($arg) || method_exists($arg, '__toString')) {
$sarg = is_array($arg) ? 'Array' : strval($arg);
$args[] = (strlen($sarg) > $argCharLimit) ? substr($sarg, 0, $argCharLimit) . '...' : $sarg;
} else {
$args[] = get_class($arg);
}
}
$funcName .= "(" . implode(",", $args) .")";
}
return $funcName;
}
/**
* Render a backtrace array into an appropriate plain-text or HTML string.
*
* @param string $bt The trace array, as returned by debug_backtrace() or Exception::getTrace()
* @param boolean $plainText Set to false for HTML output, or true for plain-text output
* @param array List of functions that should be ignored. If not set, a default is provided
* @return string The rendered backtrace
*/
public static function get_rendered_backtrace($bt, $plainText = false, $ignoredFunctions = null) {
$bt = self::filter_backtrace($bt, $ignoredFunctions);
$result = ($plainText) ? '' : '<ul>';
foreach($bt as $item) {
if($plainText) {
$result .= self::full_func_name($item,true) . "\n";
if(isset($item['line']) && isset($item['file'])) $result .= basename($item['file']) . ":$item[line]\n";
$result .= "\n";
} else {
if ($item['function'] == 'user_error') {
$name = $item['args'][0];
} else {
$name = self::full_func_name($item,true);
}
$result .= "<li><b>" . htmlentities($name, ENT_COMPAT, 'UTF-8') . "</b>\n<br />\n";
$result .= isset($item['file']) ? htmlentities(basename($item['file']), ENT_COMPAT, 'UTF-8') : '';
$result .= isset($item['line']) ? ":$item[line]" : '';
$result .= "</li>\n";
}
}
if(!$plainText) $result .= '</ul>';
return $result;
}
}