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1 <?php
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2 /**
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3 * @see https://github.com/zendframework/zend-diactoros for the canonical source repository
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4 * @copyright Copyright (c) 2015-2017 Zend Technologies USA Inc. (http://www.zend.com)
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5 * @license https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
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6 */
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7
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8 namespace Zend\Diactoros;
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9
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10 use Psr\Http\Message\RequestInterface;
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11 use Psr\Http\Message\StreamInterface;
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12 use Psr\Http\Message\UriInterface;
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13
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14 use function strtolower;
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15
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16 /**
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17 * HTTP Request encapsulation
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18 *
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19 * Requests are considered immutable; all methods that might change state are
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20 * implemented such that they retain the internal state of the current
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21 * message and return a new instance that contains the changed state.
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22 */
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23 class Request implements RequestInterface
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24 {
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25 use RequestTrait;
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26
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27 /**
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28 * @param null|string|UriInterface $uri URI for the request, if any.
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29 * @param null|string $method HTTP method for the request, if any.
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30 * @param string|resource|StreamInterface $body Message body, if any.
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31 * @param array $headers Headers for the message, if any.
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32 * @throws \InvalidArgumentException for any invalid value.
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33 */
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34 public function __construct($uri = null, $method = null, $body = 'php://temp', array $headers = [])
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35 {
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36 $this->initialize($uri, $method, $body, $headers);
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37 }
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38
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39 /**
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40 * {@inheritdoc}
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41 */
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42 public function getHeaders()
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43 {
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44 $headers = $this->headers;
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45 if (! $this->hasHeader('host')
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46 && $this->uri->getHost()
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47 ) {
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48 $headers['Host'] = [$this->getHostFromUri()];
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49 }
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50
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51 return $headers;
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52 }
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53
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54 /**
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55 * {@inheritdoc}
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56 */
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57 public function getHeader($header)
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58 {
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59 if (! $this->hasHeader($header)) {
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60 if (strtolower($header) === 'host'
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61 && $this->uri->getHost()
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62 ) {
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63 return [$this->getHostFromUri()];
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64 }
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65
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66 return [];
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67 }
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68
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69 $header = $this->headerNames[strtolower($header)];
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70
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71 return $this->headers[$header];
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72 }
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73 }
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