a0ca9394a2
This really should not be the case here as what we get here is code executed by PHP, so it should have already passed openbasedir restrictions. Signed-off-by: Michal Čihař <michal@cihar.com>
490 lines
12 KiB
PHP
490 lines
12 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Holds class PMA\libraries\Error
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*
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* @package PhpMyAdmin
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*/
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namespace PMA\libraries;
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use Exception;
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/**
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* a single error
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*
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* @package PhpMyAdmin
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*/
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class Error extends Message
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{
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/**
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* Error types
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*
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* @var array
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*/
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static public $errortype = array (
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0 => 'Internal error',
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E_ERROR => 'Error',
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E_WARNING => 'Warning',
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E_PARSE => 'Parsing Error',
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E_NOTICE => 'Notice',
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E_CORE_ERROR => 'Core Error',
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E_CORE_WARNING => 'Core Warning',
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E_COMPILE_ERROR => 'Compile Error',
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E_COMPILE_WARNING => 'Compile Warning',
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E_USER_ERROR => 'User Error',
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E_USER_WARNING => 'User Warning',
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E_USER_NOTICE => 'User Notice',
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E_STRICT => 'Runtime Notice',
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E_DEPRECATED => 'Deprecation Notice',
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E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
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);
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/**
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* Error levels
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*
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* @var array
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*/
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static public $errorlevel = array (
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0 => 'error',
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E_ERROR => 'error',
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E_WARNING => 'error',
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E_PARSE => 'error',
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E_NOTICE => 'notice',
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E_CORE_ERROR => 'error',
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E_CORE_WARNING => 'error',
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E_COMPILE_ERROR => 'error',
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E_COMPILE_WARNING => 'error',
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E_USER_ERROR => 'error',
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E_USER_WARNING => 'error',
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E_USER_NOTICE => 'notice',
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E_STRICT => 'notice',
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E_DEPRECATED => 'notice',
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E_RECOVERABLE_ERROR => 'error',
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);
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/**
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* The file in which the error occurred
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*
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* @var string
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*/
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protected $file = '';
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/**
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* The line in which the error occurred
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*
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* @var integer
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*/
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protected $line = 0;
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/**
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* Holds the backtrace for this error
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*
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* @var array
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*/
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protected $backtrace = array();
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/**
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* Constructor
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*
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* @param integer $errno error number
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* @param string $errstr error message
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* @param string $errfile file
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* @param integer $errline line
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*/
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public function __construct($errno, $errstr, $errfile, $errline)
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{
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$this->setNumber($errno);
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$this->setMessage($errstr, false);
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$this->setFile($errfile);
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$this->setLine($errline);
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$backtrace = debug_backtrace();
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// remove last three calls:
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// debug_backtrace(), handleError() and addError()
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$backtrace = array_slice($backtrace, 3);
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$this->setBacktrace($backtrace);
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}
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/**
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* Process backtrace to avoid path disclossures, objects and so on
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*
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* @param array $backtrace backtrace
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*
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* @return array
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*/
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public static function processBacktrace($backtrace)
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{
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$result = array();
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$members = array('line', 'function', 'class', 'type');
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foreach ($backtrace as $idx => $step) {
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/* Create new backtrace entry */
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$result[$idx] = array();
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/* Make path relative */
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if (isset($step['file'])) {
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$result[$idx]['file'] = Error::relPath($step['file']);
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}
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/* Store members we want */
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foreach ($members as $name) {
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if (isset($step[$name])) {
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$result[$idx][$name] = $step[$name];
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}
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}
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/* Store simplified args */
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if (isset($step['args'])) {
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foreach ($step['args'] as $key => $arg) {
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$result[$idx]['args'][$key] = Error::getArg($arg, $step['function']);
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}
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}
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}
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return $result;
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}
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/**
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* sets PMA\libraries\Error::$_backtrace
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*
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* We don't store full arguments to avoid wakeup or memory problems.
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*
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* @param array $backtrace backtrace
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*
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* @return void
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*/
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public function setBacktrace($backtrace)
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{
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$this->backtrace = Error::processBacktrace($backtrace);
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}
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/**
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* sets PMA\libraries\Error::$_line
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*
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* @param integer $line the line
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*
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* @return void
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*/
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public function setLine($line)
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{
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$this->line = $line;
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}
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/**
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* sets PMA\libraries\Error::$_file
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*
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* @param string $file the file
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*
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* @return void
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*/
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public function setFile($file)
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{
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$this->file = Error::relPath($file);
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}
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/**
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* returns unique PMA\libraries\Error::$hash, if not exists it will be created
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*
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* @return string PMA\libraries\Error::$hash
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*/
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public function getHash()
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{
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try {
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$backtrace = serialize($this->getBacktrace());
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} catch(Exception $e) {
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$backtrace = '';
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}
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if ($this->hash === null) {
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$this->hash = md5(
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$this->getNumber() .
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$this->getMessage() .
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$this->getFile() .
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$this->getLine() .
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$backtrace
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);
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}
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return $this->hash;
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}
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/**
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* returns PMA\libraries\Error::$_backtrace for first $count frames
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* pass $count = -1 to get full backtrace.
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* The same can be done by not passing $count at all.
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*
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* @param integer $count Number of stack frames.
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*
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* @return array PMA\libraries\Error::$_backtrace
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*/
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public function getBacktrace($count = -1)
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{
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if ($count != -1) {
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return array_slice($this->backtrace, 0, $count);
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}
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return $this->backtrace;
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}
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/**
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* returns PMA\libraries\Error::$file
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*
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* @return string PMA\libraries\Error::$file
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*/
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public function getFile()
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{
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return $this->file;
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}
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/**
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* returns PMA\libraries\Error::$line
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*
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* @return integer PMA\libraries\Error::$line
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*/
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public function getLine()
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{
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return $this->line;
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}
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/**
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* returns type of error
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*
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* @return string type of error
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*/
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public function getType()
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{
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return Error::$errortype[$this->getNumber()];
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}
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/**
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* returns level of error
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*
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* @return string level of error
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*/
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public function getLevel()
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{
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return Error::$errorlevel[$this->getNumber()];
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}
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/**
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* returns title prepared for HTML Title-Tag
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*
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* @return string HTML escaped and truncated title
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*/
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public function getHtmlTitle()
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{
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return htmlspecialchars(
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mb_substr($this->getTitle(), 0, 100)
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);
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}
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/**
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* returns title for error
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*
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* @return string
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*/
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public function getTitle()
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{
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return $this->getType() . ': ' . $this->getMessage();
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}
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/**
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* Get HTML backtrace
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*
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* @return string
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*/
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public function getBacktraceDisplay()
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{
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return Error::formatBacktrace(
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$this->getBacktrace(),
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"<br />\n",
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"<br />\n"
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);
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}
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/**
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* return formatted backtrace field
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*
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* @param array $backtrace Backtrace data
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* @param string $separator Arguments separator to use
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* @param string $lines Lines separator to use
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*
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* @return string formatted backtrace
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*/
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public static function formatBacktrace($backtrace, $separator, $lines)
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{
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$retval = '';
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foreach ($backtrace as $step) {
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if (isset($step['file']) && isset($step['line'])) {
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$retval .= Error::relPath($step['file'])
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. '#' . $step['line'] . ': ';
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}
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if (isset($step['class'])) {
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$retval .= $step['class'] . $step['type'];
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}
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$retval .= Error::getFunctionCall($step, $separator);
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$retval .= $lines;
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}
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return $retval;
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}
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/**
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* Formats function call in a backtrace
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*
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* @param array $step backtrace step
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* @param string $separator Arguments separator to use
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*
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* @return string
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*/
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public static function getFunctionCall($step, $separator)
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{
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$retval = $step['function'] . '(';
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if (isset($step['args'])) {
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if (count($step['args']) > 1) {
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$retval .= $separator;
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foreach ($step['args'] as $arg) {
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$retval .= "\t";
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$retval .= $arg;
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$retval .= ',' . $separator;
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}
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} elseif (count($step['args']) > 0) {
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foreach ($step['args'] as $arg) {
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$retval .= $arg;
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}
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}
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}
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$retval .= ')';
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return $retval;
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}
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/**
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* Get a single function argument
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*
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* if $function is one of include/require
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* the $arg is converted to a relative path
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*
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* @param string $arg argument to process
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* @param string $function function name
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*
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* @return string
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*/
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public static function getArg($arg, $function)
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{
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$retval = '';
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$include_functions = array(
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'include',
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'include_once',
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'require',
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'require_once',
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);
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$connect_functions = array(
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'mysql_connect',
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'mysql_pconnect',
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'mysqli_connect',
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'mysqli_real_connect',
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'connect',
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'_realConnect'
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);
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if (in_array($function, $include_functions)) {
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$retval .= Error::relPath($arg);
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} elseif (in_array($function, $connect_functions)
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&& getType($arg) === 'string'
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) {
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$retval .= getType($arg) . ' ********';
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} elseif (is_scalar($arg)) {
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$retval .= getType($arg) . ' '
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. htmlspecialchars(var_export($arg, true));
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} elseif (is_object($arg)) {
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$retval .= '<Class:' . get_class($arg) . '>';
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} else {
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$retval .= getType($arg);
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}
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return $retval;
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}
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/**
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* Gets the error as string of HTML
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*
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* @return string
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*/
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public function getDisplay()
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{
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$this->isDisplayed(true);
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$retval = '<div class="' . $this->getLevel() . '">';
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if (! $this->isUserError()) {
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$retval .= '<strong>' . $this->getType() . '</strong>';
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$retval .= ' in ' . $this->getFile() . '#' . $this->getLine();
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$retval .= "<br />\n";
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}
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$retval .= $this->getMessage();
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if (! $this->isUserError()) {
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$retval .= "<br />\n";
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$retval .= "<br />\n";
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$retval .= "<strong>Backtrace</strong><br />\n";
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$retval .= "<br />\n";
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$retval .= $this->getBacktraceDisplay();
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}
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$retval .= '</div>';
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return $retval;
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}
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/**
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* whether this error is a user error
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*
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* @return boolean
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*/
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public function isUserError()
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{
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return $this->getNumber() & (E_USER_WARNING | E_USER_ERROR | E_USER_NOTICE);
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}
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/**
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* return short relative path to phpMyAdmin basedir
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*
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* prevent path disclosure in error message,
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* and make users feel safe to submit error reports
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*
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* @param string $path path to be shorten
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*
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* @return string shortened path
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*/
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public static function relPath($path)
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{
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$dest = @realpath($path);
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/* Probably affected by open_basedir */
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if ($dest === FALSE) {
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return basename($path);
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}
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$Ahere = explode(
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DIRECTORY_SEPARATOR,
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realpath(__DIR__ . DIRECTORY_SEPARATOR . '..')
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);
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$Adest = explode(DIRECTORY_SEPARATOR, $dest);
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$result = '.';
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// && count ($Adest)>0 && count($Ahere)>0 )
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while (implode(DIRECTORY_SEPARATOR, $Adest) != implode(DIRECTORY_SEPARATOR, $Ahere)) {
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if (count($Ahere) > count($Adest)) {
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array_pop($Ahere);
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$result .= DIRECTORY_SEPARATOR . '..';
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} else {
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array_pop($Adest);
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}
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}
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$path = $result . str_replace(implode(DIRECTORY_SEPARATOR, $Adest), '', $dest);
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return str_replace(
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DIRECTORY_SEPARATOR . PATH_SEPARATOR,
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DIRECTORY_SEPARATOR,
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$path
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);
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}
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}
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