Response   F
last analyzed

Complexity

Total Complexity 131

Size/Duplication

Total Lines 1084
Duplicated Lines 0 %

Test Coverage

Coverage 76.49%

Importance

Changes 0
Metric Value
eloc 387
dl 0
loc 1084
ccs 244
cts 319
cp 0.7649
rs 2
c 0
b 0
f 0
wmc 131

33 Methods

Rating   Name   Duplication   Size   Complexity  
A sendHeaders() 0 19 5
A getHeaders() 0 7 2
A getStatusCode() 0 3 1
A setStatusCodeByException() 0 9 2
A init() 0 13 5
A setStatusCode() 0 16 5
A send() 0 12 2
A clear() 0 10 1
A getIsClientError() 0 3 2
A getIsRedirection() 0 3 2
A sendContentAsFile() 0 28 5
A refresh() 0 3 1
A xSendFile() 0 25 6
A sendFile() 0 12 3
A getIsEmpty() 0 3 1
A getIsServerError() 0 3 2
B getHttpRange() 0 27 8
A getIsNotFound() 0 3 1
A getIsOk() 0 3 1
A getIsInvalid() 0 3 2
A getCookies() 0 7 2
A getIsForbidden() 0 3 1
A setDownloadHeaders() 0 20 4
A getIsInformational() 0 3 2
B sendStreamAsFile() 0 35 7
C redirect() 0 36 12
B prepare() 0 38 11
A isSeekable() 0 8 3
A getIsSuccessful() 0 3 2
C sendCookies() 0 43 15
A getDispositionHeaderValue() 0 15 2
A defaultFormatters() 0 15 1
C sendContent() 0 46 12

How to fix   Complexity   

Complex Class

Complex classes like Response often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

While breaking up the class, it is a good idea to analyze how other classes use Response, and based on these observations, apply Extract Interface, too.

1
<?php
2
3
/**
4
 * @link https://www.yiiframework.com/
5
 * @copyright Copyright (c) 2008 Yii Software LLC
6
 * @license https://www.yiiframework.com/license/
7
 */
8
9
namespace yii\web;
10
11
use Yii;
12
use yii\base\InvalidArgumentException;
13
use yii\base\InvalidConfigException;
14
use yii\base\InvalidRouteException;
15
use yii\helpers\FileHelper;
16
use yii\helpers\Inflector;
17
use yii\helpers\StringHelper;
18
use yii\helpers\Url;
19
20
/**
21
 * The web Response class represents an HTTP response.
22
 *
23
 * It holds the [[headers]], [[cookies]] and [[content]] that is to be sent to the client.
24
 * It also controls the HTTP [[statusCode|status code]].
25
 *
26
 * Response is configured as an application component in [[\yii\web\Application]] by default.
27
 * You can access that instance via `Yii::$app->response`.
28
 *
29
 * You can modify its configuration by adding an array to your application config under `components`
30
 * as it is shown in the following example:
31
 *
32
 * ```php
33
 * 'response' => [
34
 *     'format' => yii\web\Response::FORMAT_JSON,
35
 *     'charset' => 'UTF-8',
36
 *     // ...
37
 * ]
38
 * ```
39
 *
40
 * For more details and usage information on Response, see the [guide article on responses](guide:runtime-responses).
41
 *
42
 * @property-read CookieCollection $cookies The cookie collection.
43
 * @property-write string $downloadHeaders The attachment file name.
44
 * @property-read HeaderCollection $headers The header collection.
45
 * @property-read bool $isClientError Whether this response indicates a client error.
46
 * @property-read bool $isEmpty Whether this response is empty.
47
 * @property-read bool $isForbidden Whether this response indicates the current request is forbidden.
48
 * @property-read bool $isInformational Whether this response is informational.
49
 * @property-read bool $isInvalid Whether this response has a valid [[statusCode]].
50
 * @property-read bool $isNotFound Whether this response indicates the currently requested resource is not
51
 * found.
52
 * @property-read bool $isOk Whether this response is OK.
53
 * @property-read bool $isRedirection Whether this response is a redirection.
54
 * @property-read bool $isServerError Whether this response indicates a server error.
55
 * @property-read bool $isSuccessful Whether this response is successful.
56
 * @property int $statusCode The HTTP status code to send with the response.
57
 * @property-write \Throwable $statusCodeByException The exception object.
58
 *
59
 * @author Qiang Xue <[email protected]>
60
 * @author Carsten Brandt <[email protected]>
61
 * @since 2.0
62
 */
63
class Response extends \yii\base\Response
64
{
65
    /**
66
     * @event \yii\base\Event an event that is triggered at the beginning of [[send()]].
67
     */
68
    const EVENT_BEFORE_SEND = 'beforeSend';
69
    /**
70
     * @event \yii\base\Event an event that is triggered at the end of [[send()]].
71
     */
72
    const EVENT_AFTER_SEND = 'afterSend';
73
    /**
74
     * @event \yii\base\Event an event that is triggered right after [[prepare()]] is called in [[send()]].
75
     * You may respond to this event to filter the response content before it is sent to the client.
76
     */
77
    const EVENT_AFTER_PREPARE = 'afterPrepare';
78
    const FORMAT_RAW = 'raw';
79
    const FORMAT_HTML = 'html';
80
    const FORMAT_JSON = 'json';
81
    const FORMAT_JSONP = 'jsonp';
82
    const FORMAT_XML = 'xml';
83
84
    /**
85
     * @var string the response format. This determines how to convert [[data]] into [[content]]
86
     * when the latter is not set. The value of this property must be one of the keys declared in the [[formatters]] array.
87
     * By default, the following formats are supported:
88
     *
89
     * - [[FORMAT_RAW]]: the data will be treated as the response content without any conversion.
90
     *   No extra HTTP header will be added.
91
     * - [[FORMAT_HTML]]: the data will be treated as the response content without any conversion.
92
     *   The "Content-Type" header will set as "text/html".
93
     * - [[FORMAT_JSON]]: the data will be converted into JSON format, and the "Content-Type"
94
     *   header will be set as "application/json".
95
     * - [[FORMAT_JSONP]]: the data will be converted into JSONP format, and the "Content-Type"
96
     *   header will be set as "text/javascript". Note that in this case `$data` must be an array
97
     *   with "data" and "callback" elements. The former refers to the actual data to be sent,
98
     *   while the latter refers to the name of the JavaScript callback.
99
     * - [[FORMAT_XML]]: the data will be converted into XML format. Please refer to [[XmlResponseFormatter]]
100
     *   for more details.
101
     *
102
     * You may customize the formatting process or support additional formats by configuring [[formatters]].
103
     * @see formatters
104
     */
105
    public $format = self::FORMAT_HTML;
106
    /**
107
     * @var string the MIME type (e.g. `application/json`) from the request ACCEPT header chosen for this response.
108
     * This property is mainly set by [[\yii\filters\ContentNegotiator]].
109
     */
110
    public $acceptMimeType;
111
    /**
112
     * @var array the parameters (e.g. `['q' => 1, 'version' => '1.0']`) associated with the [[acceptMimeType|chosen MIME type]].
113
     * This is a list of name-value pairs associated with [[acceptMimeType]] from the ACCEPT HTTP header.
114
     * This property is mainly set by [[\yii\filters\ContentNegotiator]].
115
     */
116
    public $acceptParams = [];
117
    /**
118
     * @var array the formatters for converting data into the response content of the specified [[format]].
119
     * The array keys are the format names, and the array values are the corresponding configurations
120
     * for creating the formatter objects.
121
     * @see format
122
     * @see defaultFormatters
123
     */
124
    public $formatters = [];
125
    /**
126
     * @var mixed the original response data. When this is not null, it will be converted into [[content]]
127
     * according to [[format]] when the response is being sent out.
128
     * @see content
129
     */
130
    public $data;
131
    /**
132
     * @var string|null the response content. When [[data]] is not null, it will be converted into [[content]]
133
     * according to [[format]] when the response is being sent out.
134
     * @see data
135
     */
136
    public $content;
137
    /**
138
     * @var resource|array|callable the stream to be sent. This can be a stream handle or an array of stream handle,
139
     * the begin position and the end position. Alternatively it can be set to a callable, which returns
140
     * (or [yields](https://www.php.net/manual/en/language.generators.syntax.php)) an array of strings that should
141
     * be echoed and flushed out one by one.
142
     *
143
     * Note that when this property is set, the [[data]] and [[content]] properties will be ignored by [[send()]].
144
     */
145
    public $stream;
146
    /**
147
     * @var string|null the charset of the text response. If not set, it will use
148
     * the value of [[Application::charset]].
149
     */
150
    public $charset;
151
    /**
152
     * @var string the HTTP status description that comes together with the status code.
153
     * @see httpStatuses
154
     */
155
    public $statusText = 'OK';
156
    /**
157
     * @var string|null the version of the HTTP protocol to use. If not set, it will be determined via `$_SERVER['SERVER_PROTOCOL']`,
158
     * or '1.1' if that is not available.
159
     */
160
    public $version;
161
    /**
162
     * @var bool whether the response has been sent. If this is true, calling [[send()]] will do nothing.
163
     */
164
    public $isSent = false;
165
    /**
166
     * @var array list of HTTP status codes and the corresponding texts
167
     */
168
    public static $httpStatuses = [
169
        100 => 'Continue',
170
        101 => 'Switching Protocols',
171
        102 => 'Processing',
172
        118 => 'Connection timed out',
173
        200 => 'OK',
174
        201 => 'Created',
175
        202 => 'Accepted',
176
        203 => 'Non-Authoritative',
177
        204 => 'No Content',
178
        205 => 'Reset Content',
179
        206 => 'Partial Content',
180
        207 => 'Multi-Status',
181
        208 => 'Already Reported',
182
        210 => 'Content Different',
183
        226 => 'IM Used',
184
        300 => 'Multiple Choices',
185
        301 => 'Moved Permanently',
186
        302 => 'Found',
187
        303 => 'See Other',
188
        304 => 'Not Modified',
189
        305 => 'Use Proxy',
190
        306 => 'Reserved',
191
        307 => 'Temporary Redirect',
192
        308 => 'Permanent Redirect',
193
        310 => 'Too many Redirect',
194
        400 => 'Bad Request',
195
        401 => 'Unauthorized',
196
        402 => 'Payment Required',
197
        403 => 'Forbidden',
198
        404 => 'Not Found',
199
        405 => 'Method Not Allowed',
200
        406 => 'Not Acceptable',
201
        407 => 'Proxy Authentication Required',
202
        408 => 'Request Time-out',
203
        409 => 'Conflict',
204
        410 => 'Gone',
205
        411 => 'Length Required',
206
        412 => 'Precondition Failed',
207
        413 => 'Request Entity Too Large',
208
        414 => 'Request-URI Too Long',
209
        415 => 'Unsupported Media Type',
210
        416 => 'Requested range unsatisfiable',
211
        417 => 'Expectation failed',
212
        418 => 'I\'m a teapot',
213
        421 => 'Misdirected Request',
214
        422 => 'Unprocessable entity',
215
        423 => 'Locked',
216
        424 => 'Method failure',
217
        425 => 'Unordered Collection',
218
        426 => 'Upgrade Required',
219
        428 => 'Precondition Required',
220
        429 => 'Too Many Requests',
221
        431 => 'Request Header Fields Too Large',
222
        449 => 'Retry With',
223
        450 => 'Blocked by Windows Parental Controls',
224
        451 => 'Unavailable For Legal Reasons',
225
        500 => 'Internal Server Error',
226
        501 => 'Not Implemented',
227
        502 => 'Bad Gateway or Proxy Error',
228
        503 => 'Service Unavailable',
229
        504 => 'Gateway Time-out',
230
        505 => 'HTTP Version not supported',
231
        507 => 'Insufficient storage',
232
        508 => 'Loop Detected',
233
        509 => 'Bandwidth Limit Exceeded',
234
        510 => 'Not Extended',
235
        511 => 'Network Authentication Required',
236
    ];
237
238
    /**
239
     * @var int the HTTP status code to send with the response.
240
     */
241
    private $_statusCode = 200;
242
    /**
243
     * @var HeaderCollection
244
     */
245
    private $_headers;
246
247
248
    /**
249
     * Initializes this component.
250
     */
251 366
    public function init()
252
    {
253 366
        if ($this->version === null) {
254 366
            if (isset($_SERVER['SERVER_PROTOCOL']) && $_SERVER['SERVER_PROTOCOL'] === 'HTTP/1.0') {
255
                $this->version = '1.0';
256
            } else {
257 366
                $this->version = '1.1';
258
            }
259
        }
260 366
        if ($this->charset === null) {
261 366
            $this->charset = Yii::$app->charset;
262
        }
263 366
        $this->formatters = array_merge($this->defaultFormatters(), $this->formatters);
264
    }
265
266
    /**
267
     * @return int the HTTP status code to send with the response.
268
     */
269 69
    public function getStatusCode()
270
    {
271 69
        return $this->_statusCode;
272
    }
273
274
    /**
275
     * Sets the response status code.
276
     * This method will set the corresponding status text if `$text` is null.
277
     * @param int $value the status code
278
     * @param string|null $text the status text. If not set, it will be set automatically based on the status code.
279
     * @throws InvalidArgumentException if the status code is invalid.
280
     * @return $this the response object itself
281
     */
282 58
    public function setStatusCode($value, $text = null)
283
    {
284 58
        if ($value === null) {
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285
            $value = 200;
286
        }
287 58
        $this->_statusCode = (int) $value;
288 58
        if ($this->getIsInvalid()) {
289
            throw new InvalidArgumentException("The HTTP status code is invalid: $value");
290
        }
291 58
        if ($text === null) {
292 54
            $this->statusText = isset(static::$httpStatuses[$this->_statusCode]) ? static::$httpStatuses[$this->_statusCode] : '';
293
        } else {
294 4
            $this->statusText = $text;
295
        }
296
297 58
        return $this;
298
    }
299
300
    /**
301
     * Sets the response status code based on the exception.
302
     * @param \Throwable $e the exception object.
303
     * @throws InvalidArgumentException if the status code is invalid.
304
     * @return $this the response object itself
305
     * @since 2.0.12
306
     */
307 20
    public function setStatusCodeByException($e)
308
    {
309 20
        if ($e instanceof HttpException) {
310 10
            $this->setStatusCode($e->statusCode);
311
        } else {
312 10
            $this->setStatusCode(500);
313
        }
314
315 20
        return $this;
316
    }
317
318
    /**
319
     * Returns the header collection.
320
     * The header collection contains the currently registered HTTP headers.
321
     * @return HeaderCollection the header collection
322
     */
323 140
    public function getHeaders()
324
    {
325 140
        if ($this->_headers === null) {
326 140
            $this->_headers = new HeaderCollection();
327
        }
328
329 140
        return $this->_headers;
330
    }
331
332
    /**
333
     * Sends the response to the client.
334
     */
335 42
    public function send()
336
    {
337 42
        if ($this->isSent) {
338 3
            return;
339
        }
340 42
        $this->trigger(self::EVENT_BEFORE_SEND);
341 42
        $this->prepare();
342 42
        $this->trigger(self::EVENT_AFTER_PREPARE);
343 42
        $this->sendHeaders();
344 42
        $this->sendContent();
345 42
        $this->trigger(self::EVENT_AFTER_SEND);
346 42
        $this->isSent = true;
347
    }
348
349
    /**
350
     * Clears the headers, cookies, content, status code of the response.
351
     */
352
    public function clear()
353
    {
354
        $this->_headers = null;
355
        $this->_cookies = null;
356
        $this->_statusCode = 200;
357
        $this->statusText = 'OK';
358
        $this->data = null;
359
        $this->stream = null;
360
        $this->content = null;
361
        $this->isSent = false;
362
    }
363
364
    /**
365
     * Sends the response headers to the client.
366
     */
367 42
    protected function sendHeaders()
368
    {
369 42
        if (headers_sent($file, $line)) {
370
            throw new HeadersAlreadySentException($file, $line);
371
        }
372 42
        if ($this->_headers) {
373 36
            foreach ($this->getHeaders() as $name => $values) {
374 36
                $name = str_replace(' ', '-', ucwords(str_replace('-', ' ', $name)));
375
                // set replace for first occurrence of header but false afterwards to allow multiple
376 36
                $replace = true;
377 36
                foreach ($values as $value) {
378 36
                    header("$name: $value", $replace);
379 36
                    $replace = false;
380
                }
381
            }
382
        }
383 42
        $statusCode = $this->getStatusCode();
384 42
        header("HTTP/{$this->version} {$statusCode} {$this->statusText}");
385 42
        $this->sendCookies();
386
    }
387
388
    /**
389
     * Sends the cookies to the client.
390
     */
391 42
    protected function sendCookies()
392
    {
393 42
        if ($this->_cookies === null) {
394 33
            return;
395
        }
396 9
        $request = Yii::$app->getRequest();
397 9
        if ($request->enableCookieValidation) {
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398 9
            if ($request->cookieValidationKey == '') {
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399
                throw new InvalidConfigException(get_class($request) . '::cookieValidationKey must be configured with a secret key.');
400
            }
401 9
            $validationKey = $request->cookieValidationKey;
402
        }
403 9
        foreach ($this->getCookies() as $cookie) {
404 9
            $value = $cookie->value;
405 9
            $expire = $cookie->expire;
406 9
            if (is_string($expire)) {
407 1
                $expire = strtotime($expire);
408 8
            } elseif (interface_exists('\\DateTimeInterface') && $expire instanceof \DateTimeInterface) {
409 2
                $expire = $expire->getTimestamp();
410
            }
411 9
            if ($expire === null || $expire === false) {
412
                $expire = 0;
413
            }
414 9
            if ($expire != 1 && isset($validationKey)) {
415 9
                $value = Yii::$app->getSecurity()->hashData(serialize([$cookie->name, $value]), $validationKey);
416
            }
417 9
            if (PHP_VERSION_ID >= 70300) {
418 9
                setcookie($cookie->name, $value, [
419 9
                    'expires' => $expire,
420 9
                    'path' => $cookie->path,
421 9
                    'domain' => $cookie->domain,
422 9
                    'secure' => $cookie->secure,
423 9
                    'httpOnly' => $cookie->httpOnly,
424 9
                    'sameSite' => !empty($cookie->sameSite) ? $cookie->sameSite : null,
425 9
                ]);
426
            } else {
427
                // Work around for setting sameSite cookie prior PHP 7.3
428
                // https://stackoverflow.com/questions/39750906/php-setcookie-samesite-strict/46971326#46971326
429
                $cookiePath = $cookie->path;
430
                if (!is_null($cookie->sameSite)) {
431
                    $cookiePath .= '; samesite=' . $cookie->sameSite;
432
                }
433
                setcookie($cookie->name, $value, $expire, $cookiePath, $cookie->domain, $cookie->secure, $cookie->httpOnly);
434
            }
435
        }
436
    }
437
438
    /**
439
     * Sends the response content to the client.
440
     */
441 42
    protected function sendContent()
442
    {
443 42
        if ($this->stream === null) {
444 38
            echo $this->content;
445
446 38
            return;
447
        }
448
449
        // Try to reset time limit for big files
450 4
        if (!function_exists('set_time_limit') || !@set_time_limit(0)) {
451 4
            Yii::warning('set_time_limit() is not available', __METHOD__);
452
        }
453
454 4
        if (is_callable($this->stream)) {
455
            $data = call_user_func($this->stream);
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Bug introduced by
It seems like $this->stream can also be of type resource; however, parameter $callback of call_user_func() does only seem to accept callable, maybe add an additional type check? ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-type  annotation

455
            $data = call_user_func(/** @scrutinizer ignore-type */ $this->stream);
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456
            foreach ($data as $datum) {
457
                echo $datum;
458
                flush();
459
            }
460
            return;
461
        }
462
463 4
        $chunkSize = 8 * 1024 * 1024; // 8MB per chunk
464
465 4
        if (is_array($this->stream)) {
466 4
            list($handle, $begin, $end) = $this->stream;
467
468
            // only seek if stream is seekable
469 4
            if ($this->isSeekable($handle)) {
470 3
                fseek($handle, $begin);
471
            }
472
473 4
            while (!feof($handle) && ($pos = ftell($handle)) <= $end) {
474 3
                if ($pos + $chunkSize > $end) {
475 3
                    $chunkSize = $end - $pos + 1;
476
                }
477 3
                echo fread($handle, $chunkSize);
478 3
                flush(); // Free up memory. Otherwise large files will trigger PHP's memory limit.
479
            }
480 4
            fclose($handle);
481
        } else {
482
            while (!feof($this->stream)) {
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Bug introduced by
It seems like $this->stream can also be of type callable; however, parameter $stream of feof() does only seem to accept resource, maybe add an additional type check? ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-type  annotation

482
            while (!feof(/** @scrutinizer ignore-type */ $this->stream)) {
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483
                echo fread($this->stream, $chunkSize);
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Bug introduced by
It seems like $this->stream can also be of type callable; however, parameter $stream of fread() does only seem to accept resource, maybe add an additional type check? ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-type  annotation

483
                echo fread(/** @scrutinizer ignore-type */ $this->stream, $chunkSize);
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484
                flush();
485
            }
486
            fclose($this->stream);
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Bug introduced by
It seems like $this->stream can also be of type callable; however, parameter $stream of fclose() does only seem to accept resource, maybe add an additional type check? ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-type  annotation

486
            fclose(/** @scrutinizer ignore-type */ $this->stream);
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487
        }
488
    }
489
490
    /**
491
     * Sends a file to the browser.
492
     *
493
     * Note that this method only prepares the response for file sending. The file is not sent
494
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
495
     *
496
     * The following is an example implementation of a controller action that allows requesting files from a directory
497
     * that is not accessible from web:
498
     *
499
     * ```php
500
     * public function actionFile($filename)
501
     * {
502
     *     $storagePath = Yii::getAlias('@app/files');
503
     *
504
     *     // check filename for allowed chars (do not allow ../ to avoid security issue: downloading arbitrary files)
505
     *     if (!preg_match('/^[a-z0-9]+\.[a-z0-9]+$/i', $filename) || !is_file("$storagePath/$filename")) {
506
     *         throw new \yii\web\NotFoundHttpException('The file does not exists.');
507
     *     }
508
     *     return Yii::$app->response->sendFile("$storagePath/$filename", $filename);
509
     * }
510
     * ```
511
     *
512
     * @param string $filePath the path of the file to be sent.
513
     * @param string|null $attachmentName the file name shown to the user. If null, it will be determined from `$filePath`.
514
     * @param array $options additional options for sending the file. The following options are supported:
515
     *
516
     *  - `mimeType`: the MIME type of the content. If not set, it will be guessed based on `$filePath`
517
     *  - `inline`: boolean, whether the browser should open the file within the browser window. Defaults to false,
518
     *    meaning a download dialog will pop up.
519
     *
520
     * @return $this the response object itself
521
     * @see sendContentAsFile()
522
     * @see sendStreamAsFile()
523
     * @see xSendFile()
524
     */
525 10
    public function sendFile($filePath, $attachmentName = null, $options = [])
526
    {
527 10
        if (!isset($options['mimeType'])) {
528 10
            $options['mimeType'] = FileHelper::getMimeTypeByExtension($filePath);
529
        }
530 10
        if ($attachmentName === null) {
531 9
            $attachmentName = basename($filePath);
532
        }
533 10
        $handle = fopen($filePath, 'rb');
534 10
        $this->sendStreamAsFile($handle, $attachmentName, $options);
535
536 6
        return $this;
537
    }
538
539
    /**
540
     * Sends the specified content as a file to the browser.
541
     *
542
     * Note that this method only prepares the response for file sending. The file is not sent
543
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
544
     *
545
     * @param string $content the content to be sent. The existing [[content]] will be discarded.
546
     * @param string $attachmentName the file name shown to the user.
547
     * @param array $options additional options for sending the file. The following options are supported:
548
     *
549
     *  - `mimeType`: the MIME type of the content. Defaults to 'application/octet-stream'.
550
     *  - `inline`: boolean, whether the browser should open the file within the browser window. Defaults to false,
551
     *    meaning a download dialog will pop up.
552
     *
553
     * @return $this the response object itself
554
     * @throws RangeNotSatisfiableHttpException if the requested range is not satisfiable
555
     * @see sendFile() for an example implementation.
556
     */
557 1
    public function sendContentAsFile($content, $attachmentName, $options = [])
558
    {
559 1
        $headers = $this->getHeaders();
560
561 1
        $contentLength = StringHelper::byteLength($content);
562 1
        $range = $this->getHttpRange($contentLength);
563
564 1
        if ($range === false) {
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565
            $headers->set('Content-Range', "bytes */$contentLength");
566
            throw new RangeNotSatisfiableHttpException();
567
        }
568
569 1
        list($begin, $end) = $range;
570 1
        if ($begin != 0 || $end != $contentLength - 1) {
571
            $this->setStatusCode(206);
572
            $headers->set('Content-Range', "bytes $begin-$end/$contentLength");
573
            $this->content = StringHelper::byteSubstr($content, $begin, $end - $begin + 1);
574
        } else {
575 1
            $this->setStatusCode(200);
576 1
            $this->content = $content;
577
        }
578
579 1
        $mimeType = isset($options['mimeType']) ? $options['mimeType'] : 'application/octet-stream';
580 1
        $this->setDownloadHeaders($attachmentName, $mimeType, !empty($options['inline']), $end - $begin + 1);
581
582 1
        $this->format = self::FORMAT_RAW;
583
584 1
        return $this;
585
    }
586
587
    /**
588
     * Sends the specified stream as a file to the browser.
589
     *
590
     * Note that this method only prepares the response for file sending. The file is not sent
591
     * until [[send()]] is called explicitly or implicitly. The latter is done after you return from a controller action.
592
     *
593
     * @param resource $handle the handle of the stream to be sent.
594
     * @param string $attachmentName the file name shown to the user.
595
     * @param array $options additional options for sending the file. The following options are supported:
596
     *
597
     *  - `mimeType`: the MIME type of the content. Defaults to 'application/octet-stream'.
598
     *  - `inline`: boolean, whether the browser should open the file within the browser window. Defaults to false,
599
     *    meaning a download dialog will pop up.
600
     *  - `fileSize`: the size of the content to stream this is useful when size of the content is known
601
     *    and the content is not seekable. Defaults to content size using `ftell()`.
602
     *    This option is available since version 2.0.4.
603
     *
604
     * @return $this the response object itself
605
     * @throws RangeNotSatisfiableHttpException if the requested range is not satisfiable
606
     * @see sendFile() for an example implementation.
607
     */
608 11
    public function sendStreamAsFile($handle, $attachmentName, $options = [])
609
    {
610 11
        $headers = $this->getHeaders();
611 11
        if (isset($options['fileSize'])) {
612
            $fileSize = $options['fileSize'];
613
        } else {
614 11
            if ($this->isSeekable($handle)) {
615 10
                fseek($handle, 0, SEEK_END);
616 10
                $fileSize = ftell($handle);
617
            } else {
618 1
                $fileSize = 0;
619
            }
620
        }
621
622 11
        $range = $this->getHttpRange($fileSize);
623 11
        if ($range === false) {
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introduced by
The condition $range === false is always false.
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624 4
            $headers->set('Content-Range', "bytes */$fileSize");
625 4
            throw new RangeNotSatisfiableHttpException();
626
        }
627
628 7
        list($begin, $end) = $range;
629 7
        if ($begin != 0 || $end != $fileSize - 1) {
630 3
            $this->setStatusCode(206);
631 3
            $headers->set('Content-Range', "bytes $begin-$end/$fileSize");
632
        } else {
633 4
            $this->setStatusCode(200);
634
        }
635
636 7
        $mimeType = isset($options['mimeType']) ? $options['mimeType'] : 'application/octet-stream';
637 7
        $this->setDownloadHeaders($attachmentName, $mimeType, !empty($options['inline']), $end - $begin + 1);
638
639 7
        $this->format = self::FORMAT_RAW;
640 7
        $this->stream = [$handle, $begin, $end];
641
642 7
        return $this;
643
    }
644
645
    /**
646
     * Sets a default set of HTTP headers for file downloading purpose.
647
     * @param string $attachmentName the attachment file name
648
     * @param string|null $mimeType the MIME type for the response. If null, `Content-Type` header will NOT be set.
649
     * @param bool $inline whether the browser should open the file within the browser window. Defaults to false,
650
     * meaning a download dialog will pop up.
651
     * @param int|null $contentLength the byte length of the file being downloaded. If null, `Content-Length` header will NOT be set.
652
     * @return $this the response object itself
653
     */
654 8
    public function setDownloadHeaders($attachmentName, $mimeType = null, $inline = false, $contentLength = null)
655
    {
656 8
        $headers = $this->getHeaders();
657
658 8
        $disposition = $inline ? 'inline' : 'attachment';
659 8
        $headers->setDefault('Pragma', 'public')
660 8
            ->setDefault('Accept-Ranges', 'bytes')
661 8
            ->setDefault('Expires', '0')
662 8
            ->setDefault('Cache-Control', 'must-revalidate, post-check=0, pre-check=0')
663 8
            ->setDefault('Content-Disposition', $this->getDispositionHeaderValue($disposition, $attachmentName));
664
665 8
        if ($mimeType !== null) {
666 8
            $headers->setDefault('Content-Type', $mimeType);
667
        }
668
669 8
        if ($contentLength !== null) {
670 8
            $headers->setDefault('Content-Length', $contentLength);
671
        }
672
673 8
        return $this;
674
    }
675
676
    /**
677
     * Determines the HTTP range given in the request.
678
     * @param int $fileSize the size of the file that will be used to validate the requested HTTP range.
679
     * @return array|bool the range (begin, end), or false if the range request is invalid.
680
     */
681 12
    protected function getHttpRange($fileSize)
682
    {
683 12
        $rangeHeader = Yii::$app->getRequest()->getHeaders()->get('Range', '-');
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683
        $rangeHeader = Yii::$app->getRequest()->/** @scrutinizer ignore-call */ getHeaders()->get('Range', '-');
Loading history...
684 12
        if ($rangeHeader === '-') {
685 5
            return [0, $fileSize - 1];
686
        }
687 7
        if (!preg_match('/^bytes=(\d*)-(\d*)$/', $rangeHeader, $matches)) {
0 ignored issues
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Bug introduced by
It seems like $rangeHeader can also be of type array and null; however, parameter $subject of preg_match() does only seem to accept string, maybe add an additional type check? ( Ignorable by Annotation )

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687
        if (!preg_match('/^bytes=(\d*)-(\d*)$/', /** @scrutinizer ignore-type */ $rangeHeader, $matches)) {
Loading history...
688 1
            return false;
689
        }
690 6
        if ($matches[1] === '') {
691 2
            $start = $fileSize - $matches[2];
692 2
            $end = $fileSize - 1;
693 4
        } elseif ($matches[2] !== '') {
694 2
            $start = $matches[1];
695 2
            $end = $matches[2];
696 2
            if ($end >= $fileSize) {
697 2
                $end = $fileSize - 1;
698
            }
699
        } else {
700 2
            $start = $matches[1];
701 2
            $end = $fileSize - 1;
702
        }
703 6
        if ($start < 0 || $start > $end) {
704 3
            return false;
705
        }
706
707 3
        return [$start, $end];
708
    }
709
710
    /**
711
     * Sends existing file to a browser as a download using x-sendfile.
712
     *
713
     * X-Sendfile is a feature allowing a web application to redirect the request for a file to the webserver
714
     * that in turn processes the request, this way eliminating the need to perform tasks like reading the file
715
     * and sending it to the user. When dealing with a lot of files (or very big files) this can lead to a great
716
     * increase in performance as the web application is allowed to terminate earlier while the webserver is
717
     * handling the request.
718
     *
719
     * The request is sent to the server through a special non-standard HTTP-header.
720
     * When the web server encounters the presence of such header it will discard all output and send the file
721
     * specified by that header using web server internals including all optimizations like caching-headers.
722
     *
723
     * As this header directive is non-standard different directives exists for different web servers applications:
724
     *
725
     * - Apache: [X-Sendfile](https://tn123.org/mod_xsendfile/)
726
     * - Lighttpd v1.4: [X-LIGHTTPD-send-file](https://redmine.lighttpd.net/projects/lighttpd/wiki/X-LIGHTTPD-send-file)
727
     * - Lighttpd v1.5: [X-Sendfile](https://redmine.lighttpd.net/projects/lighttpd/wiki/X-LIGHTTPD-send-file)
728
     * - Nginx: [X-Accel-Redirect](https://www.nginx.com/resources/wiki/XSendfile)
729
     * - Cherokee: [X-Sendfile and X-Accel-Redirect](https://cherokee-project.com/doc/other_goodies.html#x-sendfile)
730
     *
731
     * So for this method to work the X-SENDFILE option/module should be enabled by the web server and
732
     * a proper xHeader should be sent.
733
     *
734
     * **Note**
735
     *
736
     * This option allows to download files that are not under web folders, and even files that are otherwise protected
737
     * (deny from all) like `.htaccess`.
738
     *
739
     * **Side effects**
740
     *
741
     * If this option is disabled by the web server, when this method is called a download configuration dialog
742
     * will open but the downloaded file will have 0 bytes.
743
     *
744
     * **Known issues**
745
     *
746
     * There is a Bug with Internet Explorer 6, 7 and 8 when X-SENDFILE is used over an SSL connection, it will show
747
     * an error message like this: "Internet Explorer was not able to open this Internet site. The requested site
748
     * is either unavailable or cannot be found.". You can work around this problem by removing the `Pragma`-header.
749
     *
750
     * **Example**
751
     *
752
     * ```php
753
     * Yii::$app->response->xSendFile('/home/user/Pictures/picture1.jpg');
754
     * ```
755
     *
756
     * @param string $filePath file name with full path
757
     * @param string|null $attachmentName file name shown to the user. If null, it will be determined from `$filePath`.
758
     * @param array $options additional options for sending the file. The following options are supported:
759
     *
760
     *  - `mimeType`: the MIME type of the content. If not set, it will be guessed based on `$filePath`
761
     *  - `inline`: boolean, whether the browser should open the file within the browser window. Defaults to false,
762
     *    meaning a download dialog will pop up.
763
     *  - xHeader: string, the name of the x-sendfile header. Defaults to "X-Sendfile".
764
     *
765
     * @return $this the response object itself
766
     * @see sendFile()
767
     */
768
    public function xSendFile($filePath, $attachmentName = null, $options = [])
769
    {
770
        if ($attachmentName === null) {
771
            $attachmentName = basename($filePath);
772
        }
773
        if (isset($options['mimeType'])) {
774
            $mimeType = $options['mimeType'];
775
        } elseif (($mimeType = FileHelper::getMimeTypeByExtension($filePath)) === null) {
776
            $mimeType = 'application/octet-stream';
777
        }
778
        if (isset($options['xHeader'])) {
779
            $xHeader = $options['xHeader'];
780
        } else {
781
            $xHeader = 'X-Sendfile';
782
        }
783
784
        $disposition = empty($options['inline']) ? 'attachment' : 'inline';
785
        $this->getHeaders()
786
            ->setDefault($xHeader, $filePath)
787
            ->setDefault('Content-Type', $mimeType)
788
            ->setDefault('Content-Disposition', $this->getDispositionHeaderValue($disposition, $attachmentName));
789
790
        $this->format = self::FORMAT_RAW;
791
792
        return $this;
793
    }
794
795
    /**
796
     * Returns Content-Disposition header value that is safe to use with both old and new browsers.
797
     *
798
     * Fallback name:
799
     *
800
     * - Causes issues if contains non-ASCII characters with codes less than 32 or more than 126.
801
     * - Causes issues if contains urlencoded characters (starting with `%`) or `%` character. Some browsers interpret
802
     *   `filename="X"` as urlencoded name, some don't.
803
     * - Causes issues if contains path separator characters such as `\` or `/`.
804
     * - Since value is wrapped with `"`, it should be escaped as `\"`.
805
     * - Since input could contain non-ASCII characters, fallback is obtained by transliteration.
806
     *
807
     * UTF name:
808
     *
809
     * - Causes issues if contains path separator characters such as `\` or `/`.
810
     * - Should be urlencoded since headers are ASCII-only.
811
     * - Could be omitted if it exactly matches fallback name.
812
     *
813
     * @param string $disposition
814
     * @param string $attachmentName
815
     * @return string
816
     *
817
     * @since 2.0.10
818
     */
819 8
    protected function getDispositionHeaderValue($disposition, $attachmentName)
820
    {
821 8
        $fallbackName = str_replace(
822 8
            ['%', '/', '\\', '"', "\x7F"],
823 8
            ['_', '_', '_', '\\"', '_'],
824 8
            Inflector::transliterate($attachmentName, Inflector::TRANSLITERATE_LOOSE)
825 8
        );
826 8
        $utfName = rawurlencode(str_replace(['%', '/', '\\'], '', $attachmentName));
827
828 8
        $dispositionHeader = "{$disposition}; filename=\"{$fallbackName}\"";
829 8
        if ($utfName !== $fallbackName) {
830 1
            $dispositionHeader .= "; filename*=utf-8''{$utfName}";
831
        }
832
833 8
        return $dispositionHeader;
834
    }
835
836
    /**
837
     * Redirects the browser to the specified URL.
838
     *
839
     * This method adds a "Location" header to the current response. Note that it does not send out
840
     * the header until [[send()]] is called. In a controller action you may use this method as follows:
841
     *
842
     * ```php
843
     * return Yii::$app->getResponse()->redirect($url);
844
     * ```
845
     *
846
     * In other places, if you want to send out the "Location" header immediately, you should use
847
     * the following code:
848
     *
849
     * ```php
850
     * Yii::$app->getResponse()->redirect($url)->send();
851
     * return;
852
     * ```
853
     *
854
     * In AJAX mode, this normally will not work as expected unless there are some
855
     * client-side JavaScript code handling the redirection. To help achieve this goal,
856
     * this method will send out a "X-Redirect" header instead of "Location".
857
     *
858
     * If you use the "yii" JavaScript module, it will handle the AJAX redirection as
859
     * described above. Otherwise, you should write the following JavaScript code to
860
     * handle the redirection:
861
     *
862
     * ```javascript
863
     * $document.ajaxComplete(function (event, xhr, settings) {
864
     *     var url = xhr && xhr.getResponseHeader('X-Redirect');
865
     *     if (url) {
866
     *         window.location = url;
867
     *     }
868
     * });
869
     * ```
870
     *
871
     * @param string|array $url the URL to be redirected to. This can be in one of the following formats:
872
     *
873
     * - a string representing a URL (e.g. "https://example.com")
874
     * - a string representing a URL alias (e.g. "@example.com")
875
     * - an array in the format of `[$route, ...name-value pairs...]` (e.g. `['site/index', 'ref' => 1]`).
876
     *   Note that the route is with respect to the whole application, instead of relative to a controller or module.
877
     *   [[Url::to()]] will be used to convert the array into a URL.
878
     *
879
     * Any relative URL that starts with a single forward slash "/" will be converted
880
     * into an absolute one by prepending it with the host info of the current request.
881
     *
882
     * @param int $statusCode the HTTP status code. Defaults to 302.
883
     * See <https://tools.ietf.org/html/rfc2616#section-10>
884
     * for details about HTTP status code
885
     * @param bool $checkAjax whether to specially handle AJAX (and PJAX) requests. Defaults to true,
886
     * meaning if the current request is an AJAX or PJAX request, then calling this method will cause the browser
887
     * to redirect to the given URL. If this is false, a `Location` header will be sent, which when received as
888
     * an AJAX/PJAX response, may NOT cause browser redirection.
889
     * Takes effect only when request header `X-Ie-Redirect-Compatibility` is absent.
890
     * @return $this the response object itself
891
     */
892 10
    public function redirect($url, $statusCode = 302, $checkAjax = true)
893
    {
894 10
        if (is_array($url) && isset($url[0])) {
895
            // ensure the route is absolute
896 8
            $url[0] = '/' . ltrim($url[0], '/');
897
        }
898 10
        $request = Yii::$app->getRequest();
899 10
        $normalizedUrl = Url::to($url);
900 10
        if ($normalizedUrl !== null) {
0 ignored issues
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901 10
            if (preg_match('/\n/', $normalizedUrl)) {
902 1
                throw new InvalidRouteException('Route with new line character detected "' . $normalizedUrl . '".');
903
            }
904 9
            if (strncmp($normalizedUrl, '/', 1) === 0 && strncmp($normalizedUrl, '//', 2) !== 0) {
905 9
                $normalizedUrl = $request->getHostInfo() . $normalizedUrl;
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905
                $normalizedUrl = $request->/** @scrutinizer ignore-call */ getHostInfo() . $normalizedUrl;
Loading history...
906
            }
907
        }
908
909 9
        if ($checkAjax && $request->getIsAjax()) {
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909
        if ($checkAjax && $request->/** @scrutinizer ignore-call */ getIsAjax()) {
Loading history...
910
            if (
911 7
                in_array($statusCode, [301, 302])
912 7
                && preg_match('/Trident\/|MSIE /', (string)$request->userAgent)
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Bug Best Practice introduced by
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913
            ) {
914 3
                $statusCode = 200;
915
            }
916 7
            if ($request->getIsPjax()) {
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Bug introduced by
The method getIsPjax() does not exist on yii\console\Request. Since you implemented __call, consider adding a @method annotation. ( Ignorable by Annotation )

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916
            if ($request->/** @scrutinizer ignore-call */ getIsPjax()) {
Loading history...
917 6
                $this->getHeaders()->set('X-Pjax-Url', $normalizedUrl);
918
            } else {
919 7
                $this->getHeaders()->set('X-Redirect', $normalizedUrl);
920
            }
921
        } else {
922 3
            $this->getHeaders()->set('Location', $normalizedUrl);
923
        }
924
925 9
        $this->setStatusCode($statusCode);
926
927 9
        return $this;
928
    }
929
930
    /**
931
     * Refreshes the current page.
932
     * The effect of this method call is the same as the user pressing the refresh button of his browser
933
     * (without re-posting data).
934
     *
935
     * In a controller action you may use this method like this:
936
     *
937
     * ```php
938
     * return Yii::$app->getResponse()->refresh();
939
     * ```
940
     *
941
     * @param string $anchor the anchor that should be appended to the redirection URL.
942
     * Defaults to empty. Make sure the anchor starts with '#' if you want to specify it.
943
     * @return Response the response object itself
944
     */
945
    public function refresh($anchor = '')
946
    {
947
        return $this->redirect(Yii::$app->getRequest()->getUrl() . $anchor);
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Bug introduced by
The method getUrl() does not exist on yii\console\Request. Since you implemented __call, consider adding a @method annotation. ( Ignorable by Annotation )

If this is a false-positive, you can also ignore this issue in your code via the ignore-call  annotation

947
        return $this->redirect(Yii::$app->getRequest()->/** @scrutinizer ignore-call */ getUrl() . $anchor);
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948
    }
949
950
    private $_cookies;
951
952
    /**
953
     * Returns the cookie collection.
954
     *
955
     * Through the returned cookie collection, you add or remove cookies as follows,
956
     *
957
     * ```php
958
     * // add a cookie
959
     * $response->cookies->add(new Cookie([
960
     *     'name' => $name,
961
     *     'value' => $value,
962
     * ]);
963
     *
964
     * // remove a cookie
965
     * $response->cookies->remove('name');
966
     * // alternatively
967
     * unset($response->cookies['name']);
968
     * ```
969
     *
970
     * @return CookieCollection the cookie collection.
971
     */
972 91
    public function getCookies()
973
    {
974 91
        if ($this->_cookies === null) {
975 91
            $this->_cookies = new CookieCollection();
976
        }
977
978 91
        return $this->_cookies;
979
    }
980
981
    /**
982
     * @return bool whether this response has a valid [[statusCode]].
983
     */
984 58
    public function getIsInvalid()
985
    {
986 58
        return $this->getStatusCode() < 100 || $this->getStatusCode() >= 600;
987
    }
988
989
    /**
990
     * @return bool whether this response is informational
991
     */
992
    public function getIsInformational()
993
    {
994
        return $this->getStatusCode() >= 100 && $this->getStatusCode() < 200;
995
    }
996
997
    /**
998
     * @return bool whether this response is successful
999
     */
1000
    public function getIsSuccessful()
1001
    {
1002
        return $this->getStatusCode() >= 200 && $this->getStatusCode() < 300;
1003
    }
1004
1005
    /**
1006
     * @return bool whether this response is a redirection
1007
     */
1008 1
    public function getIsRedirection()
1009
    {
1010 1
        return $this->getStatusCode() >= 300 && $this->getStatusCode() < 400;
1011
    }
1012
1013
    /**
1014
     * @return bool whether this response indicates a client error
1015
     */
1016
    public function getIsClientError()
1017
    {
1018
        return $this->getStatusCode() >= 400 && $this->getStatusCode() < 500;
1019
    }
1020
1021
    /**
1022
     * @return bool whether this response indicates a server error
1023
     */
1024
    public function getIsServerError()
1025
    {
1026
        return $this->getStatusCode() >= 500 && $this->getStatusCode() < 600;
1027
    }
1028
1029
    /**
1030
     * @return bool whether this response is OK
1031
     */
1032
    public function getIsOk()
1033
    {
1034
        return $this->getStatusCode() == 200;
1035
    }
1036
1037
    /**
1038
     * @return bool whether this response indicates the current request is forbidden
1039
     */
1040
    public function getIsForbidden()
1041
    {
1042
        return $this->getStatusCode() == 403;
1043
    }
1044
1045
    /**
1046
     * @return bool whether this response indicates the currently requested resource is not found
1047
     */
1048
    public function getIsNotFound()
1049
    {
1050
        return $this->getStatusCode() == 404;
1051
    }
1052
1053
    /**
1054
     * @return bool whether this response is empty
1055
     */
1056
    public function getIsEmpty()
1057
    {
1058
        return in_array($this->getStatusCode(), [201, 204, 304]);
1059
    }
1060
1061
    /**
1062
     * @return array the formatters that are supported by default
1063
     */
1064 366
    protected function defaultFormatters()
1065
    {
1066 366
        return [
1067 366
            self::FORMAT_HTML => [
1068 366
                'class' => 'yii\web\HtmlResponseFormatter',
1069 366
            ],
1070 366
            self::FORMAT_XML => [
1071 366
                'class' => 'yii\web\XmlResponseFormatter',
1072 366
            ],
1073 366
            self::FORMAT_JSON => [
1074 366
                'class' => 'yii\web\JsonResponseFormatter',
1075 366
            ],
1076 366
            self::FORMAT_JSONP => [
1077 366
                'class' => 'yii\web\JsonResponseFormatter',
1078 366
                'useJsonp' => true,
1079 366
            ],
1080 366
        ];
1081
    }
1082
1083
    /**
1084
     * Prepares for sending the response.
1085
     * The default implementation will convert [[data]] into [[content]] and set headers accordingly.
1086
     * @throws InvalidConfigException if the formatter for the specified format is invalid or [[format]] is not supported
1087
     *
1088
     * @see https://tools.ietf.org/html/rfc7231#page-53
1089
     * @see https://tools.ietf.org/html/rfc7232#page-18
1090
     */
1091 42
    protected function prepare()
1092
    {
1093 42
        if (in_array($this->getStatusCode(), [204, 304])) {
1094
            // A 204/304 response cannot contain a message body according to rfc7231/rfc7232
1095 6
            $this->content = '';
1096 6
            $this->stream = null;
1097 6
            return;
1098
        }
1099
1100 36
        if ($this->stream !== null) {
1101 4
            return;
1102
        }
1103
1104 32
        if (isset($this->formatters[$this->format])) {
1105 29
            $formatter = $this->formatters[$this->format];
1106 29
            if (!is_object($formatter)) {
1107 29
                $this->formatters[$this->format] = $formatter = Yii::createObject($formatter);
1108
            }
1109 29
            if ($formatter instanceof ResponseFormatterInterface) {
1110 29
                $formatter->format($this);
1111
            } else {
1112 29
                throw new InvalidConfigException("The '{$this->format}' response formatter is invalid. It must implement the ResponseFormatterInterface.");
1113
            }
1114 3
        } elseif ($this->format === self::FORMAT_RAW) {
1115 3
            if ($this->data !== null) {
1116 3
                $this->content = $this->data;
1117
            }
1118
        } else {
1119
            throw new InvalidConfigException("Unsupported response format: {$this->format}");
1120
        }
1121
1122 32
        if (is_array($this->content)) {
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The condition is_array($this->content) is always false.
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1123
            throw new InvalidArgumentException('Response content must not be an array.');
1124 32
        } elseif (is_object($this->content)) {
1125
            if (method_exists($this->content, '__toString')) {
1126
                $this->content = $this->content->__toString();
1127
            } else {
1128
                throw new InvalidArgumentException('Response content must be a string or an object implementing __toString().');
1129
            }
1130
        }
1131
    }
1132
1133
    /**
1134
     * Checks if a stream is seekable
1135
     *
1136
     * @param $handle
1137
     * @return bool
1138
     */
1139 11
    private function isSeekable($handle)
1140
    {
1141 11
        if (!is_resource($handle)) {
1142
            return true;
1143
        }
1144
1145 11
        $metaData = stream_get_meta_data($handle);
1146 11
        return isset($metaData['seekable']) && $metaData['seekable'] === true;
1147
    }
1148
}
1149