| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  |  * ActiveRecord for API | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * @link      https://github.com/hiqdev/yii2-hiart | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * @package   yii2-hiart | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * @license   BSD-3-Clause | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * @copyright Copyright (c) 2015-2017, HiQDev (http://hiqdev.com/) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | namespace hiqdev\hiart\curl; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | use hiqdev\hiart\AbstractRequest; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  | use hiqdev\hiart\AbstractResponse; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | use hiqdev\hiart\ResponseErrorException; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  * Class Response represents response through cURL library. | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 19 |  |  |  */ | 
            
                                                                        
                            
            
                                    
            
            
                | 20 |  |  | class Response extends AbstractResponse | 
            
                                                                        
                            
            
                                    
            
            
                | 21 |  |  | { | 
            
                                                                        
                            
            
                                    
            
            
                | 22 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 23 |  |  |      * @var string | 
            
                                                                        
                            
            
                                    
            
            
                | 24 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 25 |  |  |     protected $rawData; | 
            
                                                                        
                            
            
                                    
            
            
                | 26 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 27 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 28 |  |  |      * @var array[] | 
            
                                                                        
                            
            
                                    
            
            
                | 29 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 30 |  |  |     protected $headers = []; | 
            
                                                                        
                            
            
                                    
            
            
                | 31 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 32 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 33 |  |  |      * @var string | 
            
                                                                        
                            
            
                                    
            
            
                | 34 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 35 |  |  |     protected $statusCode; | 
            
                                                                        
                            
            
                                    
            
            
                | 36 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 37 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 38 |  |  |      * @var string | 
            
                                                                        
                            
            
                                    
            
            
                | 39 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 40 |  |  |     protected $reasonPhrase; | 
            
                                                                        
                            
            
                                    
            
            
                | 41 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 42 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 43 |  |  |      * Response constructor. | 
            
                                                                        
                            
            
                                    
            
            
                | 44 |  |  |      * | 
            
                                                                        
                            
            
                                    
            
            
                | 45 |  |  |      * @param AbstractRequest $request | 
            
                                                                        
                            
            
                                    
            
            
                | 46 |  |  |      * @param string $rawBody the raw response, returned by `curl_exec()` method | 
            
                                                                        
                            
            
                                    
            
            
                | 47 |  |  |      * @param array $info the cURL information, returned by `curl_getinfo()` method | 
            
                                                                        
                            
            
                                    
            
            
                | 48 |  |  |      * @param string $error the cURL error message, if present. Empty string otherwise. | 
            
                                                                        
                            
            
                                    
            
            
                | 49 |  |  |      * @param int $errorCode the cURL error code, if present. Integer `0` otherwise. | 
            
                                                                        
                            
            
                                    
            
            
                | 50 |  |  |      * @throws ResponseErrorException | 
            
                                                                        
                            
            
                                    
            
            
                | 51 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |     public function __construct(AbstractRequest $request, $rawBody, $info, $error, $errorCode) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |         $this->request = $request; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |         $this->checkTransportError($error, $errorCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |         $parsedResponse = $this->parseRawResponse($rawBody, $info); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |         $this->headers = $parsedResponse['headers']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |         $this->statusCode = $parsedResponse['statusCode']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |         $this->rawData = $parsedResponse['data']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |         $this->reasonPhrase = $parsedResponse['reasonPhrase']; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 63 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 64 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 65 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 66 |  |  |      * @return mixed|string | 
            
                                                                        
                            
            
                                    
            
            
                | 67 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |     public function getRawData() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |         return $this->rawData; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 71 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 72 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 73 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 74 |  |  |      * @param string $name the header name | 
            
                                                                        
                            
            
                                    
            
            
                | 75 |  |  |      * @return array|null | 
            
                                                                        
                            
            
                                    
            
            
                | 76 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |     public function getHeader($name) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |         return isset($this->headers[$name]) ? $this->headers[$name] : null; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 80 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 81 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 82 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 83 |  |  |      * {@inheritdoc} | 
            
                                                                        
                            
            
                                    
            
            
                | 84 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |     public function getStatusCode() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |         return $this->statusCode; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 88 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 90 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 91 |  |  |      * {@inheritdoc} | 
            
                                                                        
                            
            
                                    
            
            
                | 92 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |     public function getReasonPhrase() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |         return $this->reasonPhrase; | 
                            
                    |  |  |  | 
                                                                                        
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                | 96 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 97 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 98 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 99 |  |  |      * Parses raw response and returns parsed information. | 
            
                                                                        
                            
            
                                    
            
            
                | 100 |  |  |      * | 
            
                                                                        
                            
            
                                    
            
            
                | 101 |  |  |      * @param string $data the raw response | 
            
                                                                        
                            
            
                                    
            
            
                | 102 |  |  |      * @param array $info the curl information (result of `gurl_getinfo` call) | 
            
                                                                        
                            
            
                                    
            
            
                | 103 |  |  |      * @return array array with the following keys will be returned: | 
            
                                                                        
                            
            
                                    
            
            
                | 104 |  |  |      *  - data: string, response data; | 
            
                                                                        
                            
            
                                    
            
            
                | 105 |  |  |      *  - headers: array, response headers; | 
            
                                                                        
                            
            
                                    
            
            
                | 106 |  |  |      *  - statusCode: string, the response status-code; | 
            
                                                                        
                            
            
                                    
            
            
                | 107 |  |  |      *  - reasonPhrase: string, the response reason phrase (OK, NOT FOUND, etc) | 
            
                                                                        
                            
            
                                    
            
            
                | 108 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |     protected function parseRawResponse($data, $info) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |         $result = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |         $headerSize = $info['header_size']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |         $result['data'] = substr($data, $headerSize); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |         $rawHeaders = explode("\r\n", substr($data, 0, $headerSize)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |         // First line is status-code HTTP/1.1 200 OK | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |         list(, $result['statusCode'], $result['reasonPhrase']) = explode(' ', array_shift($rawHeaders), 3); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |         foreach ($rawHeaders as $line) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |             if ($line === '') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |                 continue; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |             list($key, $value) = explode(': ', $line); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |             $result['headers'][$key][] = $value; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |         return $result; | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 129 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 130 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 131 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 132 |  |  |      * Checks $error and $errorCode for transport errors. | 
            
                                                                        
                            
            
                                    
            
            
                | 133 |  |  |      * | 
            
                                                                        
                            
            
                                    
            
            
                | 134 |  |  |      * @param string $error the cURL error message, if present. Empty string otherwise. | 
            
                                                                        
                            
            
                                    
            
            
                | 135 |  |  |      * @param int $errorCode the cURL error code, if present. Integer `0` otherwise. | 
            
                                                                        
                            
            
                                    
            
            
                | 136 |  |  |      * @throws ResponseErrorException when the error is present | 
            
                                                                        
                            
            
                                    
            
            
                | 137 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |     protected function checkTransportError($error, $errorCode) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  |         if ($error !== '' || $errorCode !== 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |             throw new ResponseErrorException($error, $this, $errorCode); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |         } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 143 |  |  |     } | 
            
                                                                        
                            
            
                                    
            
            
                | 144 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 145 |  |  |     /** | 
            
                                                                        
                            
            
                                    
            
            
                | 146 |  |  |      * Returns array of all headers. | 
            
                                                                        
                            
            
                                    
            
            
                | 147 |  |  |      * Key - Header name | 
            
                                                                        
                            
            
                                    
            
            
                | 148 |  |  |      * Value - array of header values. For example:. | 
            
                                                                        
                            
            
                                    
            
            
                | 149 |  |  |      * | 
            
                                                                        
                            
            
                                    
            
            
                | 150 |  |  |      * ```php | 
            
                                                                        
                            
            
                                    
            
            
                | 151 |  |  |      * ['Location' => ['http://example.com'], 'Expires' => ['Thu, 01 Jan 1970 00:00:00 GMT']] | 
            
                                                                        
                            
            
                                    
            
            
                | 152 |  |  |      * @return array | 
            
                                                                        
                            
            
                                    
            
            
                | 153 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |     public function getHeaders() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |         return $this->headers; | 
                            
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                | 157 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 158 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 159 |  |  |  | 
            
                        
If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.