Response.php 33.1 KB
Newer Older
Qiang Xue committed
1 2 3
<?php
/**
 * @link http://www.yiiframework.com/
Qiang Xue committed
4
 * @copyright Copyright (c) 2008 Yii Software LLC
Qiang Xue committed
5 6 7 8 9
 * @license http://www.yiiframework.com/license/
 */

namespace yii\web;

Qiang Xue committed
10
use Yii;
11
use yii\base\InvalidConfigException;
Qiang Xue committed
12
use yii\base\InvalidParamException;
13
use yii\helpers\Url;
Qiang Xue committed
14
use yii\helpers\FileHelper;
15
use yii\helpers\StringHelper;
Qiang Xue committed
16 17

/**
18 19 20 21
 * The web Response class represents an HTTP response
 *
 * It holds the [[headers]], [[cookies]] and [[content]] that is to be sent to the client.
 * It also controls the HTTP [[statusCode|status code]].
22
 *
23
 * Response is configured as an application component in [[\yii\web\Application]] by default.
24 25 26 27 28 29 30 31 32 33 34 35 36
 * You can access that instance via `Yii::$app->response`.
 *
 * You can modify its configuration by adding an array to your application config under `components`
 * as it is shown in the following example:
 *
 * ~~~
 * 'response' => [
 *     'format' => yii\web\Response::FORMAT_JSON,
 *     'charset' => 'UTF-8',
 *     // ...
 * ]
 * ~~~
 *
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
 * @property CookieCollection $cookies The cookie collection. This property is read-only.
 * @property HeaderCollection $headers The header collection. This property is read-only.
 * @property boolean $isClientError Whether this response indicates a client error. This property is
 * read-only.
 * @property boolean $isEmpty Whether this response is empty. This property is read-only.
 * @property boolean $isForbidden Whether this response indicates the current request is forbidden. This
 * property is read-only.
 * @property boolean $isInformational Whether this response is informational. This property is read-only.
 * @property boolean $isInvalid Whether this response has a valid [[statusCode]]. This property is read-only.
 * @property boolean $isNotFound Whether this response indicates the currently requested resource is not
 * found. This property is read-only.
 * @property boolean $isOk Whether this response is OK. This property is read-only.
 * @property boolean $isRedirection Whether this response is a redirection. This property is read-only.
 * @property boolean $isServerError Whether this response indicates a server error. This property is
 * read-only.
 * @property boolean $isSuccessful Whether this response is successful. This property is read-only.
53 54
 * @property integer $statusCode The HTTP status code to send with the response.
 *
Qiang Xue committed
55
 * @author Qiang Xue <qiang.xue@gmail.com>
56
 * @author Carsten Brandt <mail@cebe.cc>
Qiang Xue committed
57 58 59 60
 * @since 2.0
 */
class Response extends \yii\base\Response
{
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
    /**
     * @event ResponseEvent an event that is triggered at the beginning of [[send()]].
     */
    const EVENT_BEFORE_SEND = 'beforeSend';
    /**
     * @event ResponseEvent an event that is triggered at the end of [[send()]].
     */
    const EVENT_AFTER_SEND = 'afterSend';
    /**
     * @event ResponseEvent an event that is triggered right after [[prepare()]] is called in [[send()]].
     * You may respond to this event to filter the response content before it is sent to the client.
     */
    const EVENT_AFTER_PREPARE = 'afterPrepare';

    const FORMAT_RAW = 'raw';
    const FORMAT_HTML = 'html';
    const FORMAT_JSON = 'json';
    const FORMAT_JSONP = 'jsonp';
    const FORMAT_XML = 'xml';

    /**
     * @var string the response format. This determines how to convert [[data]] into [[content]]
83 84
     * when the latter is not set. The value of this property must be one of the keys declared in the [[formatters] array.
     * By default, the following formats are supported:
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
     *
     * - [[FORMAT_RAW]]: the data will be treated as the response content without any conversion.
     *   No extra HTTP header will be added.
     * - [[FORMAT_HTML]]: the data will be treated as the response content without any conversion.
     *   The "Content-Type" header will set as "text/html" if it is not set previously.
     * - [[FORMAT_JSON]]: the data will be converted into JSON format, and the "Content-Type"
     *   header will be set as "application/json".
     * - [[FORMAT_JSONP]]: the data will be converted into JSONP format, and the "Content-Type"
     *   header will be set as "text/javascript". Note that in this case `$data` must be an array
     *   with "data" and "callback" elements. The former refers to the actual data to be sent,
     *   while the latter refers to the name of the JavaScript callback.
     * - [[FORMAT_XML]]: the data will be converted into XML format. Please refer to [[XmlResponseFormatter]]
     *   for more details.
     *
     * You may customize the formatting process or support additional formats by configuring [[formatters]].
     * @see formatters
     */
    public $format = self::FORMAT_HTML;
103
    /**
104 105
     * @var string the MIME type (e.g. `application/json`) from the request ACCEPT header chosen for this response.
     * This property is mainly set by [\yii\filters\ContentNegotiator]].
106
     */
107
    public $acceptMimeType;
108
    /**
109
     * @var array the parameters (e.g. `['q' => 1, 'version' => '1.0']`) associated with the [[acceptMimeType|chosen MIME type]].
110
     * This is a list of name-value pairs associated with [[acceptMimeType]] from the ACCEPT HTTP header.
111
     * This property is mainly set by [\yii\filters\ContentNegotiator]].
112
     */
113
    public $acceptParams = [];
114 115 116 117 118 119
    /**
     * @var array the formatters for converting data into the response content of the specified [[format]].
     * The array keys are the format names, and the array values are the corresponding configurations
     * for creating the formatter objects.
     * @see format
     */
120
    public $formatters = [];
121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
    /**
     * @var mixed the original response data. When this is not null, it will be converted into [[content]]
     * according to [[format]] when the response is being sent out.
     * @see content
     */
    public $data;
    /**
     * @var string the response content. When [[data]] is not null, it will be converted into [[content]]
     * according to [[format]] when the response is being sent out.
     * @see data
     */
    public $content;
    /**
     * @var resource|array the stream to be sent. This can be a stream handle or an array of stream handle,
     * the begin position and the end position. Note that when this property is set, the [[data]] and [[content]]
     * properties will be ignored by [[send()]].
     */
    public $stream;
    /**
     * @var string the charset of the text response. If not set, it will use
     * the value of [[Application::charset]].
     */
    public $charset;
    /**
     * @var string the HTTP status description that comes together with the status code.
     * @see httpStatuses
     */
    public $statusText = 'OK';
    /**
     * @var string the version of the HTTP protocol to use. If not set, it will be determined via `$_SERVER['SERVER_PROTOCOL']`,
     * or '1.1' if that is not available.
     */
    public $version;
    /**
     * @var boolean whether the response has been sent. If this is true, calling [[send()]] will do nothing.
     */
    public $isSent = false;
    /**
     * @var array list of HTTP status codes and the corresponding texts
     */
    public static $httpStatuses = [
        100 => 'Continue',
        101 => 'Switching Protocols',
        102 => 'Processing',
        118 => 'Connection timed out',
        200 => 'OK',
        201 => 'Created',
        202 => 'Accepted',
        203 => 'Non-Authoritative',
        204 => 'No Content',
        205 => 'Reset Content',
        206 => 'Partial Content',
        207 => 'Multi-Status',
        208 => 'Already Reported',
        210 => 'Content Different',
        226 => 'IM Used',
        300 => 'Multiple Choices',
        301 => 'Moved Permanently',
        302 => 'Found',
        303 => 'See Other',
        304 => 'Not Modified',
        305 => 'Use Proxy',
        306 => 'Reserved',
        307 => 'Temporary Redirect',
        308 => 'Permanent Redirect',
        310 => 'Too many Redirect',
        400 => 'Bad Request',
        401 => 'Unauthorized',
        402 => 'Payment Required',
        403 => 'Forbidden',
        404 => 'Not Found',
        405 => 'Method Not Allowed',
        406 => 'Not Acceptable',
        407 => 'Proxy Authentication Required',
        408 => 'Request Time-out',
        409 => 'Conflict',
        410 => 'Gone',
        411 => 'Length Required',
        412 => 'Precondition Failed',
        413 => 'Request Entity Too Large',
        414 => 'Request-URI Too Long',
        415 => 'Unsupported Media Type',
        416 => 'Requested range unsatisfiable',
        417 => 'Expectation failed',
        418 => 'I\'m a teapot',
        422 => 'Unprocessable entity',
        423 => 'Locked',
        424 => 'Method failure',
        425 => 'Unordered Collection',
        426 => 'Upgrade Required',
        428 => 'Precondition Required',
        429 => 'Too Many Requests',
        431 => 'Request Header Fields Too Large',
        449 => 'Retry With',
        450 => 'Blocked by Windows Parental Controls',
        500 => 'Internal Server Error',
        501 => 'Not Implemented',
Carsten Brandt committed
218
        502 => 'Bad Gateway or Proxy Error',
219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
        503 => 'Service Unavailable',
        504 => 'Gateway Time-out',
        505 => 'HTTP Version not supported',
        507 => 'Insufficient storage',
        508 => 'Loop Detected',
        509 => 'Bandwidth Limit Exceeded',
        510 => 'Not Extended',
        511 => 'Network Authentication Required',
    ];

    /**
     * @var integer the HTTP status code to send with the response.
     */
    private $_statusCode = 200;
    /**
     * @var HeaderCollection
     */
    private $_headers;

238

239 240 241 242 243 244
    /**
     * Initializes this component.
     */
    public function init()
    {
        if ($this->version === null) {
Ceana Razvan committed
245
            if (isset($_SERVER['SERVER_PROTOCOL']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.0') {
246 247 248 249 250 251 252 253
                $this->version = '1.0';
            } else {
                $this->version = '1.1';
            }
        }
        if ($this->charset === null) {
            $this->charset = Yii::$app->charset;
        }
254 255
        $formatters = $this->defaultFormatters();
        $this->formatters = empty($this->formatters) ? $formatters : array_merge($formatters, $this->formatters);
256 257 258 259 260 261 262 263 264 265 266 267 268
    }

    /**
     * @return integer the HTTP status code to send with the response.
     */
    public function getStatusCode()
    {
        return $this->_statusCode;
    }

    /**
     * Sets the response status code.
     * This method will set the corresponding status text if `$text` is null.
269 270
     * @param integer $value the status code
     * @param string $text the status text. If not set, it will be set automatically based on the status code.
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347
     * @throws InvalidParamException if the status code is invalid.
     */
    public function setStatusCode($value, $text = null)
    {
        if ($value === null) {
            $value = 200;
        }
        $this->_statusCode = (int) $value;
        if ($this->getIsInvalid()) {
            throw new InvalidParamException("The HTTP status code is invalid: $value");
        }
        if ($text === null) {
            $this->statusText = isset(static::$httpStatuses[$this->_statusCode]) ? static::$httpStatuses[$this->_statusCode] : '';
        } else {
            $this->statusText = $text;
        }
    }

    /**
     * Returns the header collection.
     * The header collection contains the currently registered HTTP headers.
     * @return HeaderCollection the header collection
     */
    public function getHeaders()
    {
        if ($this->_headers === null) {
            $this->_headers = new HeaderCollection;
        }
        return $this->_headers;
    }

    /**
     * Sends the response to the client.
     */
    public function send()
    {
        if ($this->isSent) {
            return;
        }
        $this->trigger(self::EVENT_BEFORE_SEND);
        $this->prepare();
        $this->trigger(self::EVENT_AFTER_PREPARE);
        $this->sendHeaders();
        $this->sendContent();
        $this->trigger(self::EVENT_AFTER_SEND);
        $this->isSent = true;
    }

    /**
     * Clears the headers, cookies, content, status code of the response.
     */
    public function clear()
    {
        $this->_headers = null;
        $this->_cookies = null;
        $this->_statusCode = 200;
        $this->statusText = 'OK';
        $this->data = null;
        $this->stream = null;
        $this->content = null;
        $this->isSent = false;
    }

    /**
     * Sends the response headers to the client
     */
    protected function sendHeaders()
    {
        if (headers_sent()) {
            return;
        }
        $statusCode = $this->getStatusCode();
        header("HTTP/{$this->version} $statusCode {$this->statusText}");
        if ($this->_headers) {
            $headers = $this->getHeaders();
            foreach ($headers as $name => $values) {
                $name = str_replace(' ', '-', ucwords(str_replace('-', ' ', $name)));
348 349
                // set replace for first occurance of header but false afterwards to allow multiple
                $replace = true;
350
                foreach ($values as $value) {
351 352
                    header("$name: $value", $replace);
                    $replace = false;
353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368
                }
            }
        }
        $this->sendCookies();
    }

    /**
     * Sends the cookies to the client.
     */
    protected function sendCookies()
    {
        if ($this->_cookies === null) {
            return;
        }
        $request = Yii::$app->getRequest();
        if ($request->enableCookieValidation) {
369 370 371 372
            if ($request->cookieValidationKey == '') {
                throw new InvalidConfigException(get_class($request) . '::cookieValidationKey must be configured with a secret key.');
            }
            $validationKey = $request->cookieValidationKey;
373 374 375 376
        }
        foreach ($this->getCookies() as $cookie) {
            $value = $cookie->value;
            if ($cookie->expire != 1  && isset($validationKey)) {
377
                $value = Yii::$app->getSecurity()->hashData(serialize($value), $validationKey);
378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
            }
            setcookie($cookie->name, $value, $cookie->expire, $cookie->path, $cookie->domain, $cookie->secure, $cookie->httpOnly);
        }
        $this->getCookies()->removeAll();
    }

    /**
     * Sends the response content to the client
     */
    protected function sendContent()
    {
        if ($this->stream === null) {
            echo $this->content;

            return;
        }

        set_time_limit(0); // Reset time limit for big files
        $chunkSize = 8 * 1024 * 1024; // 8MB per chunk

        if (is_array($this->stream)) {
            list ($handle, $begin, $end) = $this->stream;
            fseek($handle, $begin);
            while (!feof($handle) && ($pos = ftell($handle)) <= $end) {
                if ($pos + $chunkSize > $end) {
                    $chunkSize = $end - $pos + 1;
                }
                echo fread($handle, $chunkSize);
                flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit.
            }
            fclose($handle);
        } else {
            while (!feof($this->stream)) {
                echo fread($this->stream, $chunkSize);
                flush();
            }
            fclose($this->stream);
        }
    }

    /**
     * Sends a file to the browser.
     *
     * Note that this method only prepares the response for file sending. The file is not sent
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
     *
424 425 426
     * @param string $filePath the path of the file to be sent.
     * @param string $attachmentName the file name shown to the user. If null, it will be determined from `$filePath`.
     * @param string $mimeType the MIME type of the content. If null, it will be guessed based on `$filePath`
427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448
     * @return static the response object itself
     */
    public function sendFile($filePath, $attachmentName = null, $mimeType = null)
    {
        if ($mimeType === null && ($mimeType = FileHelper::getMimeTypeByExtension($filePath)) === null) {
            $mimeType = 'application/octet-stream';
        }
        if ($attachmentName === null) {
            $attachmentName = basename($filePath);
        }
        $handle = fopen($filePath, 'rb');
        $this->sendStreamAsFile($handle, $attachmentName, $mimeType);

        return $this;
    }

    /**
     * Sends the specified content as a file to the browser.
     *
     * Note that this method only prepares the response for file sending. The file is not sent
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
     *
449 450 451 452
     * @param string $content the content to be sent. The existing [[content]] will be discarded.
     * @param string $attachmentName the file name shown to the user.
     * @param string $mimeType the MIME type of the content.
     * @return static the response object itself
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
     * @throws HttpException if the requested range is not satisfiable
     */
    public function sendContentAsFile($content, $attachmentName, $mimeType = 'application/octet-stream')
    {
        $headers = $this->getHeaders();
        $contentLength = StringHelper::byteLength($content);
        $range = $this->getHttpRange($contentLength);
        if ($range === false) {
            $headers->set('Content-Range', "bytes */$contentLength");
            throw new HttpException(416, 'Requested range not satisfiable');
        }

        $headers->setDefault('Pragma', 'public')
            ->setDefault('Accept-Ranges', 'bytes')
            ->setDefault('Expires', '0')
            ->setDefault('Content-Type', $mimeType)
            ->setDefault('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
            ->setDefault('Content-Transfer-Encoding', 'binary')
            ->setDefault('Content-Length', StringHelper::byteLength($content))
            ->setDefault('Content-Disposition', "attachment; filename=\"$attachmentName\"");

        list($begin, $end) = $range;
        if ($begin !=0 || $end != $contentLength - 1) {
            $this->setStatusCode(206);
            $headers->set('Content-Range', "bytes $begin-$end/$contentLength");
            $this->content = StringHelper::byteSubstr($content, $begin, $end - $begin + 1);
        } else {
            $this->setStatusCode(200);
            $this->content = $content;
        }

        $this->format = self::FORMAT_RAW;

        return $this;
    }

    /**
     * Sends the specified stream as a file to the browser.
     *
     * Note that this method only prepares the response for file sending. The file is not sent
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
     *
495 496 497 498
     * @param resource $handle the handle of the stream to be sent.
     * @param string $attachmentName the file name shown to the user.
     * @param string $mimeType the MIME type of the stream content.
     * @return static the response object itself
499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538
     * @throws HttpException if the requested range cannot be satisfied.
     */
    public function sendStreamAsFile($handle, $attachmentName, $mimeType = 'application/octet-stream')
    {
        $headers = $this->getHeaders();
        fseek($handle, 0, SEEK_END);
        $fileSize = ftell($handle);

        $range = $this->getHttpRange($fileSize);
        if ($range === false) {
            $headers->set('Content-Range', "bytes */$fileSize");
            throw new HttpException(416, 'Requested range not satisfiable');
        }

        list($begin, $end) = $range;
        if ($begin !=0 || $end != $fileSize - 1) {
            $this->setStatusCode(206);
            $headers->set('Content-Range', "bytes $begin-$end/$fileSize");
        } else {
            $this->setStatusCode(200);
        }

        $length = $end - $begin + 1;

        $headers->setDefault('Pragma', 'public')
            ->setDefault('Accept-Ranges', 'bytes')
            ->setDefault('Expires', '0')
            ->setDefault('Content-Type', $mimeType)
            ->setDefault('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
            ->setDefault('Content-Transfer-Encoding', 'binary')
            ->setDefault('Content-Length', $length)
            ->setDefault('Content-Disposition', "attachment; filename=\"$attachmentName\"");
        $this->format = self::FORMAT_RAW;
        $this->stream = [$handle, $begin, $end];

        return $this;
    }

    /**
     * Determines the HTTP range given in the request.
539
     * @param integer $fileSize the size of the file that will be used to validate the requested HTTP range.
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615
     * @return array|boolean the range (begin, end), or false if the range request is invalid.
     */
    protected function getHttpRange($fileSize)
    {
        if (!isset($_SERVER['HTTP_RANGE']) || $_SERVER['HTTP_RANGE'] === '-') {
            return [0, $fileSize - 1];
        }
        if (!preg_match('/^bytes=(\d*)-(\d*)$/', $_SERVER['HTTP_RANGE'], $matches)) {
            return false;
        }
        if ($matches[1] === '') {
            $start = $fileSize - $matches[2];
            $end = $fileSize - 1;
        } elseif ($matches[2] !== '') {
            $start = $matches[1];
            $end = $matches[2];
            if ($end >= $fileSize) {
                $end = $fileSize - 1;
            }
        } else {
            $start = $matches[1];
            $end = $fileSize - 1;
        }
        if ($start < 0 || $start > $end) {
            return false;
        } else {
            return [$start, $end];
        }
    }

    /**
     * Sends existing file to a browser as a download using x-sendfile.
     *
     * X-Sendfile is a feature allowing a web application to redirect the request for a file to the webserver
     * that in turn processes the request, this way eliminating the need to perform tasks like reading the file
     * and sending it to the user. When dealing with a lot of files (or very big files) this can lead to a great
     * increase in performance as the web application is allowed to terminate earlier while the webserver is
     * handling the request.
     *
     * The request is sent to the server through a special non-standard HTTP-header.
     * When the web server encounters the presence of such header it will discard all output and send the file
     * specified by that header using web server internals including all optimizations like caching-headers.
     *
     * As this header directive is non-standard different directives exists for different web servers applications:
     *
     * - Apache: [X-Sendfile](http://tn123.org/mod_xsendfile)
     * - Lighttpd v1.4: [X-LIGHTTPD-send-file](http://redmine.lighttpd.net/projects/lighttpd/wiki/X-LIGHTTPD-send-file)
     * - Lighttpd v1.5: [X-Sendfile](http://redmine.lighttpd.net/projects/lighttpd/wiki/X-LIGHTTPD-send-file)
     * - Nginx: [X-Accel-Redirect](http://wiki.nginx.org/XSendfile)
     * - Cherokee: [X-Sendfile and X-Accel-Redirect](http://www.cherokee-project.com/doc/other_goodies.html#x-sendfile)
     *
     * So for this method to work the X-SENDFILE option/module should be enabled by the web server and
     * a proper xHeader should be sent.
     *
     * **Note**
     *
     * This option allows to download files that are not under web folders, and even files that are otherwise protected
     * (deny from all) like `.htaccess`.
     *
     * **Side effects**
     *
     * If this option is disabled by the web server, when this method is called a download configuration dialog
     * will open but the downloaded file will have 0 bytes.
     *
     * **Known issues**
     *
     * There is a Bug with Internet Explorer 6, 7 and 8 when X-SENDFILE is used over an SSL connection, it will show
     * an error message like this: "Internet Explorer was not able to open this Internet site. The requested site
     * is either unavailable or cannot be found.". You can work around this problem by removing the `Pragma`-header.
     *
     * **Example**
     *
     * ~~~
     * Yii::$app->response->xSendFile('/home/user/Pictures/picture1.jpg');
     * ~~~
     *
616 617
     * @param string $filePath file name with full path
     * @param string $attachmentName file name shown to the user. If null, it will be determined from `$filePath`.
lynicidn committed
618
     * @param string $mimeType the MIME type of the file. If null, it will be determined based on `$filePath`.
619
     * @param string $xHeader the name of the x-sendfile header.
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684
     * @return static the response object itself
     */
    public function xSendFile($filePath, $attachmentName = null, $mimeType = null, $xHeader = 'X-Sendfile')
    {
        if ($mimeType === null && ($mimeType = FileHelper::getMimeTypeByExtension($filePath)) === null) {
            $mimeType = 'application/octet-stream';
        }
        if ($attachmentName === null) {
            $attachmentName = basename($filePath);
        }

        $this->getHeaders()
            ->setDefault($xHeader, $filePath)
            ->setDefault('Content-Type', $mimeType)
            ->setDefault('Content-Disposition', "attachment; filename=\"$attachmentName\"");

        return $this;
    }

    /**
     * Redirects the browser to the specified URL.
     *
     * This method adds a "Location" header to the current response. Note that it does not send out
     * the header until [[send()]] is called. In a controller action you may use this method as follows:
     *
     * ~~~
     * return Yii::$app->getResponse()->redirect($url);
     * ~~~
     *
     * In other places, if you want to send out the "Location" header immediately, you should use
     * the following code:
     *
     * ~~~
     * Yii::$app->getResponse()->redirect($url)->send();
     * return;
     * ~~~
     *
     * In AJAX mode, this normally will not work as expected unless there are some
     * client-side JavaScript code handling the redirection. To help achieve this goal,
     * this method will send out a "X-Redirect" header instead of "Location".
     *
     * If you use the "yii" JavaScript module, it will handle the AJAX redirection as
     * described above. Otherwise, you should write the following JavaScript code to
     * handle the redirection:
     *
     * ~~~
     * $document.ajaxComplete(function (event, xhr, settings) {
     *     var url = xhr.getResponseHeader('X-Redirect');
     *     if (url) {
     *         window.location = url;
     *     }
     * });
     * ~~~
     *
     * @param string|array $url the URL to be redirected to. This can be in one of the following formats:
     *
     * - a string representing a URL (e.g. "http://example.com")
     * - a string representing a URL alias (e.g. "@example.com")
     * - an array in the format of `[$route, ...name-value pairs...]` (e.g. `['site/index', 'ref' => 1]`).
     *   Note that the route is with respect to the whole application, instead of relative to a controller or module.
     *   [[Url::to()]] will be used to convert the array into a URL.
     *
     * Any relative URL will be converted into an absolute one by prepending it with the host info
     * of the current request.
     *
685 686 687 688
     * @param integer $statusCode the HTTP status code. Defaults to 302.
     * See <http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html>
     * for details about HTTP status code
     * @return static the response object itself
689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
     */
    public function redirect($url, $statusCode = 302)
    {
        if (is_array($url) && isset($url[0])) {
            // ensure the route is absolute
            $url[0] = '/' . ltrim($url[0], '/');
        }
        $url = Url::to($url);
        if (strpos($url, '/') === 0 && strpos($url, '//') !== 0) {
            $url = Yii::$app->getRequest()->getHostInfo() . $url;
        }

        if (Yii::$app->getRequest()->getIsPjax()) {
            $this->getHeaders()->set('X-Pjax-Url', $url);
        } elseif (Yii::$app->getRequest()->getIsAjax()) {
            $this->getHeaders()->set('X-Redirect', $url);
        } else {
            $this->getHeaders()->set('Location', $url);
        }
        $this->setStatusCode($statusCode);

        return $this;
    }

    /**
     * Refreshes the current page.
     * The effect of this method call is the same as the user pressing the refresh button of his browser
     * (without re-posting data).
     *
     * In a controller action you may use this method like this:
     *
     * ~~~
     * return Yii::$app->getResponse()->refresh();
     * ~~~
     *
724 725
     * @param string $anchor the anchor that should be appended to the redirection URL.
     * Defaults to empty. Make sure the anchor starts with '#' if you want to specify it.
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
     * @return Response the response object itself
     */
    public function refresh($anchor = '')
    {
        return $this->redirect(Yii::$app->getRequest()->getUrl() . $anchor);
    }

    private $_cookies;

    /**
     * Returns the cookie collection.
     * Through the returned cookie collection, you add or remove cookies as follows,
     *
     * ~~~
     * // add a cookie
     * $response->cookies->add(new Cookie([
     *     'name' => $name,
     *     'value' => $value,
     * ]);
     *
     * // remove a cookie
     * $response->cookies->remove('name');
     * // alternatively
     * unset($response->cookies['name']);
     * ~~~
     *
     * @return CookieCollection the cookie collection.
     */
    public function getCookies()
    {
        if ($this->_cookies === null) {
            $this->_cookies = new CookieCollection;
        }
        return $this->_cookies;
    }

    /**
     * @return boolean whether this response has a valid [[statusCode]].
     */
    public function getIsInvalid()
    {
        return $this->getStatusCode() < 100 || $this->getStatusCode() >= 600;
    }

    /**
     * @return boolean whether this response is informational
     */
    public function getIsInformational()
    {
        return $this->getStatusCode() >= 100 && $this->getStatusCode() < 200;
    }

    /**
     * @return boolean whether this response is successful
     */
    public function getIsSuccessful()
    {
        return $this->getStatusCode() >= 200 && $this->getStatusCode() < 300;
    }

    /**
     * @return boolean whether this response is a redirection
     */
    public function getIsRedirection()
    {
        return $this->getStatusCode() >= 300 && $this->getStatusCode() < 400;
    }

    /**
     * @return boolean whether this response indicates a client error
     */
    public function getIsClientError()
    {
        return $this->getStatusCode() >= 400 && $this->getStatusCode() < 500;
    }

    /**
     * @return boolean whether this response indicates a server error
     */
    public function getIsServerError()
    {
        return $this->getStatusCode() >= 500 && $this->getStatusCode() < 600;
    }

    /**
     * @return boolean whether this response is OK
     */
    public function getIsOk()
    {
        return $this->getStatusCode() == 200;
    }

    /**
     * @return boolean whether this response indicates the current request is forbidden
     */
    public function getIsForbidden()
    {
        return $this->getStatusCode() == 403;
    }

    /**
     * @return boolean whether this response indicates the currently requested resource is not found
     */
    public function getIsNotFound()
    {
        return $this->getStatusCode() == 404;
    }

    /**
     * @return boolean whether this response is empty
     */
    public function getIsEmpty()
    {
        return in_array($this->getStatusCode(), [201, 204, 304]);
    }

842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
    /**
     * @return array the formatters that are supported by default
     */
    protected function defaultFormatters()
    {
        return [
            self::FORMAT_HTML => 'yii\web\HtmlResponseFormatter',
            self::FORMAT_XML => 'yii\web\XmlResponseFormatter',
            self::FORMAT_JSON => 'yii\web\JsonResponseFormatter',
            self::FORMAT_JSONP => [
                'class' => 'yii\web\JsonResponseFormatter',
                'useJsonp' => true,
            ],
        ];
    }

858 859 860 861 862 863 864 865 866 867 868 869 870 871
    /**
     * Prepares for sending the response.
     * The default implementation will convert [[data]] into [[content]] and set headers accordingly.
     * @throws InvalidConfigException if the formatter for the specified format is invalid or [[format]] is not supported
     */
    protected function prepare()
    {
        if ($this->stream !== null || $this->data === null) {
            return;
        }

        if (isset($this->formatters[$this->format])) {
            $formatter = $this->formatters[$this->format];
            if (!is_object($formatter)) {
872
                $this->formatters[$this->format] = $formatter = Yii::createObject($formatter);
873 874 875 876 877 878
            }
            if ($formatter instanceof ResponseFormatterInterface) {
                $formatter->format($this);
            } else {
                throw new InvalidConfigException("The '{$this->format}' response formatter is invalid. It must implement the ResponseFormatterInterface.");
            }
879 880
        } elseif ($this->format === self::FORMAT_RAW) {
            $this->content = $this->data;
881
        } else {
882
            throw new InvalidConfigException("Unsupported response format: {$this->format}");
883 884 885 886 887 888 889 890 891 892 893 894
        }

        if (is_array($this->content)) {
            throw new InvalidParamException("Response content must not be an array.");
        } elseif (is_object($this->content)) {
            if (method_exists($this->content, '__toString')) {
                $this->content = $this->content->__toString();
            } else {
                throw new InvalidParamException("Response content must be a string or an object implementing __toString().");
            }
        }
    }
Qiang Xue committed
895
}