338 lines
10 KiB
PHP
338 lines
10 KiB
PHP
<?php
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/**
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* Class of static methods to support debugging.
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*/
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class Debug {
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/**
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* @var $mail_server string Custom mailserver for sending debug mails.
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*/
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protected static $custom_smtp_server = '';
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protected static $send_errors_to;
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protected static $send_warnings_to;
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/**
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* Show the contents of val in a debug-friendly way.
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* Debug::show() is intended to be equivalent to dprintr()
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*/
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static function show($val, $showHeader = true) {
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if(!Director::isLive()) {
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if($showHeader) {
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$caller = Debug::caller();
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if(Director::is_ajax())
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echo "Debug ($caller[class]$caller[type]$caller[function]() in line $caller[line] of " . basename($caller['file']) . ")\n";
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else
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echo "<div style=\"background-color: white; text-align: left; width: 50em\">\n<hr>\n<h3>Debug <span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]() \n<span style=\"font-weight:normal\">in line</span> $caller[line] \n<span style=\"font-weight:normal\">of</span> " . basename($caller['file']) . ")</span>\n</h3>\n";
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}
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echo Debug::text($val);
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if(!Director::is_ajax()) echo "</div>";
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}
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}
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static function mailBuffer( $email, $subject ) {
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mail( $email, $subject, ob_get_contents() );
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ob_end_clean();
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}
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static function endshow($val) {
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if(!Director::isLive()) {
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$caller = Debug::caller();
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echo "<hr>\n<h3>Debug \n<span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]() \n<span style=\"font-weight:normal\">in line</span> $caller[line] \n<span style=\"font-weight:normal\">of</span> " . basename($caller['file']) . ")</span>\n</h3>\n";
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echo Debug::text($val);
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die();
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}
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}
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static function text($val) {
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if(is_object($val) && $val->hasMethod('debug')) {
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return $val->debug();
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} else {
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if(is_array($val)) {
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$result = "<ul>\n";
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foreach($val as $k => $v) {
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$result .= "<li>$k = " . Debug::text($v) . "</li>\n";
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}
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$val = $result . "</ul>\n";
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} else if (is_object($val)) {
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$val = var_export($val, true);
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} else {
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if(true || !Director::is_ajax()) {
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$val = "<pre style=\"font-family: Courier new\">" . htmlentities($val) . "</pre>\n";
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}
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}
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return $val;
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}
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}
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/**
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* Show a debugging message
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*/
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static function message($message, $showHeader = true) {
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if(!Director::isLive()) {
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$caller = Debug::caller();
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$file = basename($caller['file']);
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echo "<p style=\"background-color: white; color: black; width: 95%; margin: 0.5em; padding: 0.3em; border: 1px #CCC solid\">\n";
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if($showHeader) echo "<b>Debug (line $caller[line] of $file):</b>\n ";
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echo Convert::raw2xml(trim($message)) . "</p>\n";
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}
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}
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/**
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* Load an error handler
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*/
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static function loadErrorHandlers() {
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Debug::loadFatalErrorHandler();
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}
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static function loadFatalErrorHandler() {
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set_error_handler('errorHandler', E_ALL & ~E_NOTICE);
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}
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static function warningHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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if(self::$send_warnings_to) self::emailError(self::$send_warnings_to, $errno, $errstr, $errfile, $errline, $errcontext, "Warning");
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if(Director::isDev()) {
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if(error_reporting() != 0) { // otherwise the error was suppressed with @
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self::showError($errno, $errstr, $errfile, $errline, $errcontext);
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die();
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}
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}
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}
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static function fatalHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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if(self::$send_errors_to) self::emailError(self::$send_errors_to, $errno, $errstr, $errfile, $errline, $errcontext, "Error");
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if(Director::isDev()) {
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Debug::showError($errno, $errstr, $errfile, $errline, $errcontext);
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} else {
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Debug::friendlyError($errno, $errstr, $errfile, $errline, $errcontext);
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}
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die();
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}
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static function friendlyError($errno, $errstr, $errfile, $errline, $errcontext) {
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header("HTTP/1.0 500 Internal server error");
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if(Director::is_ajax()) {
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echo "ERROR:There has been an error";
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} else {
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if(file_exists('../assets/error-500.html')) {
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echo "ERROR:";
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include('../assets/error-500.html');
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} else {
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echo "ERROR:<h1>Error</h1><p>The website server has not been able to respond to your request.</p>\n";
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}
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}
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}
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static function showError($errno, $errstr, $errfile, $errline, $errcontext) {
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if(!headers_sent()) header("HTTP/1.0 500 Internal server error");
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if(Director::is_ajax()) {
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echo "ERROR:Error $errno: $errstr\n At l$errline in $errfile\n";
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Debug::backtrace();
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} else {
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echo "<div style=\"border: 5px red solid\">\n";
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echo "<p style=\"color: white; background-color: red; margin: 0\">FATAL ERROR: $errstr<br />\n At line $errline in $errfile<br />\n<br />\n</p>\n";
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Debug::backtrace();
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echo "<h2>Context</h2>\n";
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Debug::show($errcontext);
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echo "</div>\n";
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}
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}
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static function emailError($emailAddress, $errno, $errstr, $errfile, $errline, $errcontext, $errorType = "Error") {
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if(strtolower($errorType) == 'warning') {
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$colour = "orange";
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} else {
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$colour = "red";
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}
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$data = "<div style=\"border: 5px $colour solid\">\n";
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$data .= "<p style=\"color: white; background-color: $colour; margin: 0\">$errorType: $errstr<br /> At line $errline in $errfile\n<br />\n<br />\n</p>\n";
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$data .= Debug::backtrace(true);
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$data .= "</div>\n";
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// override smtp-server if needed
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if(self::$custom_smtp_server) {
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ini_set("SMTP", self::$custom_smtp_server);
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}
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mail($emailAddress, "$errorType on $_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]", $data, "Content-type: text/html\nFrom: errors@silverstripe.com");
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}
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/**
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* @param string $server IP-Address or domain
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*/
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static function set_custom_smtp_server($server) {
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self::$custom_smtp_server = $server;
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}
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/**
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* @return string
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*/
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static function get_custom_smtp_server() {
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return self::$custom_smtp_server;
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}
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/**
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* Send errors to the given email address.
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* Can be used like so:
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* if(Director::isLive()) Debug::send_errors_to("sam@silverstripe.com");
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* @param emailAddress The email address to send them to
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* @param sendWarnings Set to true to send warnings as well as errors.
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*/
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static function send_errors_to($emailAddress, $sendWarnings = true) {
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self::$send_errors_to = $emailAddress;
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self::$send_warnings_to = $sendWarnings ? $emailAddress : null;
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}
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/**
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* @return string
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*/
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static function get_send_errors_to() {
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return self::$send_errors_to;
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}
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/**
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* @return string
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*/
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static function get_send_warnings_to() {
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return self::$send_warnings_to;
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}
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/**
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* Deprecated. Send live errors and warnings to the given address.
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* Use send_errors_to() instead.
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*/
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static function sendLiveErrorsTo($emailAddress) {
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if(!Director::isDev()) self::send_errors_to($emailAddress, true);
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}
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static function caller() {
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$bt = debug_backtrace();
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$caller = $bt[2];
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$caller['line'] = $bt[1]['line'];
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$caller['file'] = $bt[1]['file'];
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if(!isset($caller['class'])) $caller['class'] = '';
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if(!isset($caller['type'])) $caller['type'] = '';
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return $caller;
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}
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static function backtrace($returnVal = false, $ignoreAjax = false) {
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$bt = debug_backtrace();
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// Ingore functions that are plumbing of the error handler
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$ignoredFunctions = array('Debug::emailError','Debug::warningHandler','Debug::fatalHandler','errorHandler','Debug::showError','Debug::backtrace');
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while( $bt && in_array(self::full_func_name($bt[0]), $ignoredFunctions) ) {
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array_shift($bt);
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}
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$result = "";
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foreach($bt as $item) {
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if(Director::is_ajax() && !$ignoreAjax) {
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$result .= self::full_func_name($item,true) . "\n";
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$result .= "line $item[line] of " . basename($item['file']) . "\n\n";
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} else {
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$result .= "<p><b>" . self::full_func_name($item,true) . "</b>\n<br />\n";
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$result .= isset($item['line']) ? "line $item[line] of " : '';
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$result .= isset($item['file']) ? basename($item['file']) : '';
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$result .= "</p>\n";
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}
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}
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if($returnVal) return $result;
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else echo $result;
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}
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/**
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* Return the full function name. If showArgs is set to true, a string representation of the arguments will be shown
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*/
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static function full_func_name($item, $showArgs = false) {
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$funcName = '';
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if(isset($item['class'])) $funcName .= $item['class'];
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if(isset($item['type'])) $funcName .= $item['type'];
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if(isset($item['function'])) $funcName .= $item['function'];
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if($showArgs && isset($item['args'])) {
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@$funcName .= "(" . implode(",", (array)$item['args']) .")";
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}
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return $funcName;
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}
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/**
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* Check if the user has permissions to run URL debug tools,
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* else redirect them to log in.
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*/
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static function require_developer_login() {
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if(Director::isDev()) {
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return;
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}
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if(isset($_SESSION['loggedInAs'])) {
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// We have to do some raw SQL here, because this method is called in Object::defineMethods().
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// This means we have to be careful about what objects we create, as we don't want Object::defineMethods()
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// being called again.
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// This basically calls Permission::checkMember($_SESSION['loggedInAs'], 'ADMIN');
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$memberID = $_SESSION['loggedInAs'];
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$groups = DB::query("SELECT GroupID from Group_Members WHERE MemberID=" . $memberID);
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$groupCSV = implode($groups->column(), ',');
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$permission = DB::query("
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SELECT ID
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FROM Permission
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WHERE (
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Code = 'ADMIN'
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AND Type = " . Permission::GRANT_PERMISSION . "
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AND GroupID IN ($groupCSV)
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)
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")->value();
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if($permission) {
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return;
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}
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}
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// This basically does the same as
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// Security::permissionFailure(null, "You need to login with developer access to make use of debugging tools.");
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// We have to do this because of how early this method is called in execution.
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$_SESSION['Security']['Message']['message'] = "You need to login with developer access to make use of debugging tools.";
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$_SESSION['Security']['Message']['type'] = 'warning';
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$_SESSION['BackURL'] = $_SERVER['REQUEST_URI'];
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header("HTTP/1.1 302 Found");
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header("Location: " . Director::baseURL() . "Security/login");
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die();
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}
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}
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function errorHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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switch($errno) {
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case E_ERROR:
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case E_CORE_ERROR:
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case E_USER_ERROR:
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Debug::fatalHandler($errno, $errstr, $errfile, $errline, $errcontext);
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break;
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case E_WARNING:
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case E_CORE_WARNING:
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case E_USER_WARNING:
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Debug::warningHandler($errno, $errstr, $errfile, $errline, $errcontext);
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break;
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}
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}
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?>
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