ErrorHandler.php 15.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10
<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\web;

use Yii;
11
use yii\base\Exception;
12 13
use yii\base\ErrorException;
use yii\base\UserException;
14
use yii\helpers\VarDumper;
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

/**
 * ErrorHandler handles uncaught PHP errors and exceptions.
 *
 * ErrorHandler displays these errors using appropriate views based on the
 * nature of the errors and the mode the application runs at.
 *
 * ErrorHandler is configured as an application component in [[\yii\base\Application]] by default.
 * You can access that instance via `Yii::$app->errorHandler`.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @author Timur Ruziev <resurtm@gmail.com>
 * @since 2.0
 */
class ErrorHandler extends \yii\base\ErrorHandler
{
    /**
32
     * @var integer maximum number of source code lines to be displayed. Defaults to 19.
33
     */
34
    public $maxSourceLines = 19;
35
    /**
36
     * @var integer maximum number of trace source code lines to be displayed. Defaults to 13.
37
     */
38
    public $maxTraceSourceLines = 13;
39 40 41
    /**
     * @var string the route (e.g. 'site/error') to the controller action that will be used
     * to display external errors. Inside the action, it can retrieve the error information
42
     * using `Yii::$app->errorHandler->exception. This property defaults to null, meaning ErrorHandler
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
     * will handle the error display.
     */
    public $errorAction;
    /**
     * @var string the path of the view file for rendering exceptions without call stack information.
     */
    public $errorView = '@yii/views/errorHandler/error.php';
    /**
     * @var string the path of the view file for rendering exceptions.
     */
    public $exceptionView = '@yii/views/errorHandler/exception.php';
    /**
     * @var string the path of the view file for rendering exceptions and errors call stack element.
     */
    public $callStackItemView = '@yii/views/errorHandler/callStackItem.php';
    /**
     * @var string the path of the view file for rendering previous exceptions.
     */
    public $previousExceptionView = '@yii/views/errorHandler/previousException.php';


    /**
     * Renders the exception.
66
     * @param \Exception $exception the exception to be rendered.
67 68 69
     */
    protected function renderException($exception)
    {
70 71
        if (Yii::$app->has('response')) {
            $response = Yii::$app->getResponse();
72
            $response->isSent = false;
73 74 75
        } else {
            $response = new Response();
        }
76

Qiang Xue committed
77
        $useErrorView = $response->format === Response::FORMAT_HTML && (!YII_DEBUG || $exception instanceof UserException);
78 79 80 81 82 83 84 85

        if ($useErrorView && $this->errorAction !== null) {
            $result = Yii::$app->runAction($this->errorAction);
            if ($result instanceof Response) {
                $response = $result;
            } else {
                $response->data = $result;
            }
Qiang Xue committed
86
        } elseif ($response->format === Response::FORMAT_HTML) {
87
            if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest' || YII_ENV_TEST) {
88
                // AJAX request
89
                $response->data = '<pre>' . $this->htmlEncode($this->convertExceptionToString($exception)) . '</pre>';
90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120
            } else {
                // if there is an error during error rendering it's useful to
                // display PHP error in debug mode instead of a blank screen
                if (YII_DEBUG) {
                    ini_set('display_errors', 1);
                }
                $file = $useErrorView ? $this->errorView : $this->exceptionView;
                $response->data = $this->renderFile($file, [
                    'exception' => $exception,
                ]);
            }
        } else {
            $response->data = $this->convertExceptionToArray($exception);
        }

        if ($exception instanceof HttpException) {
            $response->setStatusCode($exception->statusCode);
        } else {
            $response->setStatusCode(500);
        }

        $response->send();
    }

    /**
     * Converts an exception into an array.
     * @param \Exception $exception the exception being converted
     * @return array the array representation of the exception.
     */
    protected function convertExceptionToArray($exception)
    {
121 122 123 124
        if (!YII_DEBUG && !$exception instanceof UserException && !$exception instanceof HttpException) {
            $exception = new HttpException(500, 'There was an error at the server.');
        }

125
        $array = [
126
            'name' => ($exception instanceof Exception || $exception instanceof ErrorException) ? $exception->getName() : 'Exception',
127 128 129 130 131 132
            'message' => $exception->getMessage(),
            'code' => $exception->getCode(),
        ];
        if ($exception instanceof HttpException) {
            $array['status'] = $exception->statusCode;
        }
133 134 135 136 137 138 139 140 141
        if (YII_DEBUG) {
            $array['type'] = get_class($exception);
            if (!$exception instanceof UserException) {
                $array['file'] = $exception->getFile();
                $array['line'] = $exception->getLine();
                $array['stack-trace'] = explode("\n", $exception->getTraceAsString());
                if ($exception instanceof \yii\db\Exception) {
                    $array['error-info'] = $exception->errorInfo;
                }
142
            }
143
        }
144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
        if (($prev = $exception->getPrevious()) !== null) {
            $array['previous'] = $this->convertExceptionToArray($prev);
        }

        return $array;
    }

    /**
     * Converts special characters to HTML entities.
     * @param string $text to encode.
     * @return string encoded original text.
     */
    public function htmlEncode($text)
    {
        return htmlspecialchars($text, ENT_QUOTES, Yii::$app->charset);
    }

    /**
     * Adds informational links to the given PHP type/class.
     * @param string $code type/class name to be linkified.
     * @return string linkified with HTML type/class name.
     */
    public function addTypeLinks($code)
    {
168
        if (preg_match('/(.*?)::([^(]+)/', $code, $matches)) {
169 170
            $class = $matches[1];
            $method = $matches[2];
171
            $text = $this->htmlEncode($class) . '::' . $this->htmlEncode($method);
172 173
        } else {
            $class = $code;
174 175 176 177 178
            $text = $this->htmlEncode($class);
        }

        if (strpos($code, 'yii\\') !== 0) {
            return $text;
179 180 181 182 183
        }

        $page = $this->htmlEncode(strtolower(str_replace('\\', '-', $class)));
        $url = "http://www.yiiframework.com/doc-2.0/$page.html";
        if (isset($method)) {
184
            $url .= "#$method()-detail";
185 186
        }

187
        return '<a href="' . $url . '" target="_blank">' . $text . '</a>';
188 189 190 191 192 193 194 195 196 197 198
    }

    /**
     * Renders a view file as a PHP script.
     * @param string $_file_ the view file.
     * @param array $_params_ the parameters (name-value pairs) that will be extracted and made available in the view file.
     * @return string the rendering result
     */
    public function renderFile($_file_, $_params_)
    {
        $_params_['handler'] = $this;
199
        if ($this->exception instanceof ErrorException || !Yii::$app->has('view')) {
200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
            ob_start();
            ob_implicit_flush(false);
            extract($_params_, EXTR_OVERWRITE);
            require(Yii::getAlias($_file_));

            return ob_get_clean();
        } else {
            return Yii::$app->getView()->renderFile($_file_, $_params_, $this);
        }
    }

    /**
     * Renders the previous exception stack for a given Exception.
     * @param \Exception $exception the exception whose precursors should be rendered.
     * @return string HTML content of the rendered previous exceptions.
     * Empty string if there are none.
     */
    public function renderPreviousExceptions($exception)
    {
        if (($previous = $exception->getPrevious()) !== null) {
            return $this->renderFile($this->previousExceptionView, ['exception' => $previous]);
        } else {
            return '';
        }
    }

    /**
     * Renders a single call stack element.
     * @param string|null $file name where call has happened.
     * @param integer|null $line number on which call has happened.
     * @param string|null $class called class name.
     * @param string|null $method called function/method name.
     * @param integer $index number of the call stack element.
233
     * @param array $args array of method arguments.
234 235
     * @return string HTML content of the rendered call stack element.
     */
236
    public function renderCallStackItem($file, $line, $class, $method, $args, $index)
237 238 239 240 241 242 243 244 245 246
    {
        $lines = [];
        $begin = $end = 0;
        if ($file !== null && $line !== null) {
            $line--; // adjust line number from one-based to zero-based
            $lines = @file($file);
            if ($line < 0 || $lines === false || ($lineCount = count($lines)) < $line + 1) {
                return '';
            }

247
            $half = (int) (($index == 1 ? $this->maxSourceLines : $this->maxTraceSourceLines) / 2);
248 249 250 251 252 253 254 255 256 257 258 259 260
            $begin = $line - $half > 0 ? $line - $half : 0;
            $end = $line + $half < $lineCount ? $line + $half : $lineCount - 1;
        }

        return $this->renderFile($this->callStackItemView, [
            'file' => $file,
            'line' => $line,
            'class' => $class,
            'method' => $method,
            'index' => $index,
            'lines' => $lines,
            'begin' => $begin,
            'end' => $end,
261
            'args' => $args,
262 263 264 265 266 267 268 269 270 271 272 273
        ]);
    }

    /**
     * Renders the request information.
     * @return string the rendering result
     */
    public function renderRequest()
    {
        $request = '';
        foreach (['_GET', '_POST', '_SERVER', '_FILES', '_COOKIE', '_SESSION', '_ENV'] as $name) {
            if (!empty($GLOBALS[$name])) {
274
                $request .= '$' . $name . ' = ' . VarDumper::export($GLOBALS[$name]) . ";\n\n";
275 276 277 278 279 280 281 282 283 284 285 286 287
            }
        }

        return '<pre>' . rtrim($request, "\n") . '</pre>';
    }

    /**
     * Determines whether given name of the file belongs to the framework.
     * @param string $file name to be checked.
     * @return boolean whether given name of the file belongs to the framework.
     */
    public function isCoreFile($file)
    {
288
        return $file === null || strpos(realpath($file), YII2_PATH . DIRECTORY_SEPARATOR) === 0;
289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
    }

    /**
     * Creates HTML containing link to the page with the information on given HTTP status code.
     * @param integer $statusCode to be used to generate information link.
     * @param string $statusDescription Description to display after the the status code.
     * @return string generated HTML with HTTP status code information.
     */
    public function createHttpStatusLink($statusCode, $statusDescription)
    {
        return '<a href="http://en.wikipedia.org/wiki/List_of_HTTP_status_codes#' . (int) $statusCode . '" target="_blank">HTTP ' . (int) $statusCode . ' &ndash; ' . $statusDescription . '</a>';
    }

    /**
     * Creates string containing HTML link which refers to the home page of determined web-server software
     * and its full name.
     * @return string server software information hyperlink.
     */
    public function createServerInformationLink()
    {
309
        $serverUrls = [
310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338
            'http://httpd.apache.org/' => ['apache'],
            'http://nginx.org/' => ['nginx'],
            'http://lighttpd.net/' => ['lighttpd'],
            'http://gwan.com/' => ['g-wan', 'gwan'],
            'http://iis.net/' => ['iis', 'services'],
            'http://php.net/manual/en/features.commandline.webserver.php' => ['development'],
        ];
        if (isset($_SERVER['SERVER_SOFTWARE'])) {
            foreach ($serverUrls as $url => $keywords) {
                foreach ($keywords as $keyword) {
                    if (stripos($_SERVER['SERVER_SOFTWARE'], $keyword) !== false) {
                        return '<a href="' . $url . '" target="_blank">' . $this->htmlEncode($_SERVER['SERVER_SOFTWARE']) . '</a>';
                    }
                }
            }
        }

        return '';
    }

    /**
     * Creates string containing HTML link which refers to the page with the current version
     * of the framework and version number text.
     * @return string framework version information hyperlink.
     */
    public function createFrameworkVersionLink()
    {
        return '<a href="http://github.com/yiisoft/yii2/" target="_blank">' . $this->htmlEncode(Yii::getVersion()) . '</a>';
    }
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366

    /**
     * Converts arguments array to its string representation
     *
     * @param array $args arguments array to be converted
     * @return string string representation of the arguments array
     */
    public function argumentsToString($args)
    {
        $count = 0;
        $isAssoc = $args !== array_values($args);

        foreach ($args as $key => $value) {
            $count++;
            if($count>=5) {
                if($count>5) {
                    unset($args[$key]);
                } else {
                    $args[$key] = '...';
                }
                continue;
            }

            if (is_object($value)) {
                $args[$key] = '<span class="title">' . $this->htmlEncode(get_class($value)) . '</span>';
            } elseif (is_bool($value)) {
                $args[$key] = '<span class="keyword">' . ($value ? 'true' : 'false') . '</span>';
            } elseif (is_string($value)) {
367 368 369 370 371 372
                $fullValue = $this->htmlEncode($value);
                if (mb_strlen($value, 'utf8') > 32) {
                    $displayValue = $this->htmlEncode(mb_substr($value, 0, 32, 'utf8')) . '...';
                    $args[$key] = "<span class=\"string\" title=\"$fullValue\">'$displayValue'</span>";
                } else {
                    $args[$key] = "<span class=\"string\">'$fullValue'</span>";
373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
                }
            } elseif (is_array($value)) {
                $args[$key] = '[' . $this->argumentsToString($value) . ']';
            } elseif ($value === null) {
                $args[$key] = '<span class="keyword">null</span>';
            } elseif(is_resource($value)) {
                $args[$key] = '<span class="keyword">resource</span>';
            } else {
                $args[$key] = '<span class="number">' . $value . '</span>';
            }

            if (is_string($key)) {
                $args[$key] = '<span class="string">\'' . $this->htmlEncode($key) . "'</span> => $args[$key]";
            } elseif ($isAssoc) {
                $args[$key] = "<span class=\"number\">$key</span> => $args[$key]";
            }
        }
        $out = implode(", ", $args);

        return $out;
    }
394 395 396 397 398 399 400 401 402 403 404 405 406

    /**
     * Returns human-readable exception name
     * @param \Exception $exception
     * @return string human-readable exception name or null if it cannot be determined
     */
    public function getExceptionName($exception)
    {
        if ($exception instanceof \yii\base\Exception || $exception instanceof \yii\base\InvalidCallException || $exception instanceof \yii\base\InvalidParamException || $exception instanceof \yii\base\UnknownMethodException) {
            return $exception->getName();
        }
        return null;
    }
407
}