itstructure /
yii2-template-multilanguage
| Total Complexity | 145 |
| Total Lines | 1154 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
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 |
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| 19 | class Response |
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| 20 | { |
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| 21 | const HTTP_CONTINUE = 100; |
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| 22 | const HTTP_SWITCHING_PROTOCOLS = 101; |
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| 23 | const HTTP_PROCESSING = 102; // RFC2518 |
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| 24 | const HTTP_OK = 200; |
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| 25 | const HTTP_CREATED = 201; |
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| 26 | const HTTP_ACCEPTED = 202; |
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| 27 | const HTTP_NON_AUTHORITATIVE_INFORMATION = 203; |
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| 28 | const HTTP_NO_CONTENT = 204; |
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| 29 | const HTTP_RESET_CONTENT = 205; |
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| 30 | const HTTP_PARTIAL_CONTENT = 206; |
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| 31 | const HTTP_MULTI_STATUS = 207; // RFC4918 |
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| 32 | const HTTP_ALREADY_REPORTED = 208; // RFC5842 |
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| 33 | const HTTP_IM_USED = 226; // RFC3229 |
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| 34 | const HTTP_MULTIPLE_CHOICES = 300; |
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| 35 | const HTTP_MOVED_PERMANENTLY = 301; |
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| 36 | const HTTP_FOUND = 302; |
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| 37 | const HTTP_SEE_OTHER = 303; |
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| 38 | const HTTP_NOT_MODIFIED = 304; |
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| 39 | const HTTP_USE_PROXY = 305; |
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| 40 | const HTTP_RESERVED = 306; |
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| 41 | const HTTP_TEMPORARY_REDIRECT = 307; |
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| 42 | const HTTP_PERMANENTLY_REDIRECT = 308; // RFC7238 |
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| 43 | const HTTP_BAD_REQUEST = 400; |
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| 44 | const HTTP_UNAUTHORIZED = 401; |
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| 45 | const HTTP_PAYMENT_REQUIRED = 402; |
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| 46 | const HTTP_FORBIDDEN = 403; |
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| 47 | const HTTP_NOT_FOUND = 404; |
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| 48 | const HTTP_METHOD_NOT_ALLOWED = 405; |
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| 49 | const HTTP_NOT_ACCEPTABLE = 406; |
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| 50 | const HTTP_PROXY_AUTHENTICATION_REQUIRED = 407; |
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| 51 | const HTTP_REQUEST_TIMEOUT = 408; |
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| 52 | const HTTP_CONFLICT = 409; |
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| 53 | const HTTP_GONE = 410; |
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| 54 | const HTTP_LENGTH_REQUIRED = 411; |
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| 55 | const HTTP_PRECONDITION_FAILED = 412; |
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| 56 | const HTTP_REQUEST_ENTITY_TOO_LARGE = 413; |
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| 57 | const HTTP_REQUEST_URI_TOO_LONG = 414; |
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| 58 | const HTTP_UNSUPPORTED_MEDIA_TYPE = 415; |
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| 59 | const HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416; |
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| 60 | const HTTP_EXPECTATION_FAILED = 417; |
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| 61 | const HTTP_I_AM_A_TEAPOT = 418; // RFC2324 |
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| 62 | const HTTP_MISDIRECTED_REQUEST = 421; // RFC7540 |
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| 63 | const HTTP_UNPROCESSABLE_ENTITY = 422; // RFC4918 |
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| 64 | const HTTP_LOCKED = 423; // RFC4918 |
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| 65 | const HTTP_FAILED_DEPENDENCY = 424; // RFC4918 |
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| 66 | const HTTP_RESERVED_FOR_WEBDAV_ADVANCED_COLLECTIONS_EXPIRED_PROPOSAL = 425; // RFC2817 |
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| 67 | const HTTP_UPGRADE_REQUIRED = 426; // RFC2817 |
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| 68 | const HTTP_PRECONDITION_REQUIRED = 428; // RFC6585 |
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| 69 | const HTTP_TOO_MANY_REQUESTS = 429; // RFC6585 |
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| 70 | const HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE = 431; // RFC6585 |
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| 71 | const HTTP_UNAVAILABLE_FOR_LEGAL_REASONS = 451; |
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| 72 | const HTTP_INTERNAL_SERVER_ERROR = 500; |
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| 73 | const HTTP_NOT_IMPLEMENTED = 501; |
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| 74 | const HTTP_BAD_GATEWAY = 502; |
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| 75 | const HTTP_SERVICE_UNAVAILABLE = 503; |
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| 76 | const HTTP_GATEWAY_TIMEOUT = 504; |
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| 77 | const HTTP_VERSION_NOT_SUPPORTED = 505; |
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| 78 | const HTTP_VARIANT_ALSO_NEGOTIATES_EXPERIMENTAL = 506; // RFC2295 |
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| 79 | const HTTP_INSUFFICIENT_STORAGE = 507; // RFC4918 |
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| 80 | const HTTP_LOOP_DETECTED = 508; // RFC5842 |
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| 81 | const HTTP_NOT_EXTENDED = 510; // RFC2774 |
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| 82 | const HTTP_NETWORK_AUTHENTICATION_REQUIRED = 511; // RFC6585 |
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| 83 | |||
| 84 | /** |
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| 85 | * @var \Symfony\Component\HttpFoundation\ResponseHeaderBag |
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| 86 | */ |
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| 87 | public $headers; |
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| 88 | |||
| 89 | /** |
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| 90 | * @var string |
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| 91 | */ |
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| 92 | protected $content; |
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| 93 | |||
| 94 | /** |
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| 95 | * @var string |
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| 96 | */ |
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| 97 | protected $version; |
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| 98 | |||
| 99 | /** |
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| 100 | * @var int |
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| 101 | */ |
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| 102 | protected $statusCode; |
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| 103 | |||
| 104 | /** |
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| 105 | * @var string |
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| 106 | */ |
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| 107 | protected $statusText; |
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| 108 | |||
| 109 | /** |
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| 110 | * @var string |
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| 111 | */ |
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| 112 | protected $charset; |
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| 113 | |||
| 114 | /** |
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| 115 | * Status codes translation table. |
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| 116 | * |
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| 117 | * The list of codes is complete according to the |
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| 118 | * {@link http://www.iana.org/assignments/http-status-codes/ Hypertext Transfer Protocol (HTTP) Status Code Registry} |
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| 119 | * (last updated 2016-03-01). |
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| 120 | * |
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| 121 | * Unless otherwise noted, the status code is defined in RFC2616. |
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| 122 | * |
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| 123 | * @var array |
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| 124 | */ |
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| 125 | public static $statusTexts = array( |
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| 126 | 100 => 'Continue', |
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| 127 | 101 => 'Switching Protocols', |
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| 128 | 102 => 'Processing', // RFC2518 |
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| 129 | 200 => 'OK', |
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| 130 | 201 => 'Created', |
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| 131 | 202 => 'Accepted', |
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| 132 | 203 => 'Non-Authoritative Information', |
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| 133 | 204 => 'No Content', |
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| 134 | 205 => 'Reset Content', |
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| 135 | 206 => 'Partial Content', |
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| 136 | 207 => 'Multi-Status', // RFC4918 |
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| 137 | 208 => 'Already Reported', // RFC5842 |
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| 138 | 226 => 'IM Used', // RFC3229 |
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| 139 | 300 => 'Multiple Choices', |
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| 140 | 301 => 'Moved Permanently', |
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| 141 | 302 => 'Found', |
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| 142 | 303 => 'See Other', |
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| 143 | 304 => 'Not Modified', |
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| 144 | 305 => 'Use Proxy', |
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| 145 | 306 => 'Reserved', |
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| 146 | 307 => 'Temporary Redirect', |
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| 147 | 308 => 'Permanent Redirect', // RFC7238 |
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| 148 | 400 => 'Bad Request', |
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| 149 | 401 => 'Unauthorized', |
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| 150 | 402 => 'Payment Required', |
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| 151 | 403 => 'Forbidden', |
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| 152 | 404 => 'Not Found', |
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| 153 | 405 => 'Method Not Allowed', |
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| 154 | 406 => 'Not Acceptable', |
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| 155 | 407 => 'Proxy Authentication Required', |
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| 156 | 408 => 'Request Timeout', |
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| 157 | 409 => 'Conflict', |
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| 158 | 410 => 'Gone', |
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| 159 | 411 => 'Length Required', |
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| 160 | 412 => 'Precondition Failed', |
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| 161 | 413 => 'Payload Too Large', |
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| 162 | 414 => 'URI Too Long', |
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| 163 | 415 => 'Unsupported Media Type', |
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| 164 | 416 => 'Range Not Satisfiable', |
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| 165 | 417 => 'Expectation Failed', |
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| 166 | 418 => 'I\'m a teapot', // RFC2324 |
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| 167 | 421 => 'Misdirected Request', // RFC7540 |
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| 168 | 422 => 'Unprocessable Entity', // RFC4918 |
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| 169 | 423 => 'Locked', // RFC4918 |
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| 170 | 424 => 'Failed Dependency', // RFC4918 |
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| 171 | 425 => 'Reserved for WebDAV advanced collections expired proposal', // RFC2817 |
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| 172 | 426 => 'Upgrade Required', // RFC2817 |
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| 173 | 428 => 'Precondition Required', // RFC6585 |
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| 174 | 429 => 'Too Many Requests', // RFC6585 |
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| 175 | 431 => 'Request Header Fields Too Large', // RFC6585 |
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| 176 | 451 => 'Unavailable For Legal Reasons', // RFC7725 |
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| 177 | 500 => 'Internal Server Error', |
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| 178 | 501 => 'Not Implemented', |
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| 179 | 502 => 'Bad Gateway', |
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| 180 | 503 => 'Service Unavailable', |
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| 181 | 504 => 'Gateway Timeout', |
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| 182 | 505 => 'HTTP Version Not Supported', |
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| 183 | 506 => 'Variant Also Negotiates', // RFC2295 |
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| 184 | 507 => 'Insufficient Storage', // RFC4918 |
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| 185 | 508 => 'Loop Detected', // RFC5842 |
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| 186 | 510 => 'Not Extended', // RFC2774 |
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| 187 | 511 => 'Network Authentication Required', // RFC6585 |
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| 188 | ); |
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| 189 | |||
| 190 | /** |
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| 191 | * Constructor. |
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| 192 | * |
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| 193 | * @param mixed $content The response content, see setContent() |
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| 194 | * @param int $status The response status code |
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| 195 | * @param array $headers An array of response headers |
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| 196 | * |
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| 197 | * @throws \InvalidArgumentException When the HTTP status code is not valid |
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| 198 | */ |
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| 199 | public function __construct($content = '', $status = 200, $headers = array()) |
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| 200 | { |
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| 201 | $this->headers = new ResponseHeaderBag($headers); |
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| 202 | $this->setContent($content); |
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| 203 | $this->setStatusCode($status); |
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| 204 | $this->setProtocolVersion('1.0'); |
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| 205 | if (!$this->headers->has('Date')) { |
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| 206 | $this->setDate(\DateTime::createFromFormat('U', time(), new \DateTimeZone('UTC'))); |
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| 207 | } |
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| 208 | } |
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| 209 | |||
| 210 | /** |
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| 211 | * Factory method for chainability. |
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| 212 | * |
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| 213 | * Example: |
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| 214 | * |
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| 215 | * return Response::create($body, 200) |
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| 216 | * ->setSharedMaxAge(300); |
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| 217 | * |
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| 218 | * @param mixed $content The response content, see setContent() |
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| 219 | * @param int $status The response status code |
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| 220 | * @param array $headers An array of response headers |
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| 221 | * |
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| 222 | * @return static |
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| 223 | */ |
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| 224 | public static function create($content = '', $status = 200, $headers = array()) |
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| 225 | { |
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| 226 | return new static($content, $status, $headers); |
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| 227 | } |
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| 228 | |||
| 229 | /** |
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| 230 | * Returns the Response as an HTTP string. |
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| 231 | * |
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| 232 | * The string representation of the Response is the same as the |
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| 233 | * one that will be sent to the client only if the prepare() method |
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| 234 | * has been called before. |
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| 235 | * |
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| 236 | * @return string The Response as an HTTP string |
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| 237 | * |
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| 238 | * @see prepare() |
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| 239 | */ |
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| 240 | public function __toString() |
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| 241 | { |
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| 242 | return |
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| 243 | sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText)."\r\n". |
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| 244 | $this->headers."\r\n". |
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| 245 | $this->getContent(); |
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| 246 | } |
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| 247 | |||
| 248 | /** |
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| 249 | * Clones the current Response instance. |
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| 250 | */ |
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| 251 | public function __clone() |
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| 252 | { |
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| 253 | $this->headers = clone $this->headers; |
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| 254 | } |
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| 255 | |||
| 256 | /** |
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| 257 | * Prepares the Response before it is sent to the client. |
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| 258 | * |
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| 259 | * This method tweaks the Response to ensure that it is |
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| 260 | * compliant with RFC 2616. Most of the changes are based on |
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| 261 | * the Request that is "associated" with this Response. |
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| 262 | * |
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| 263 | * @param Request $request A Request instance |
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| 264 | * |
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| 265 | * @return $this |
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| 266 | */ |
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| 267 | public function prepare(Request $request) |
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| 268 | { |
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| 269 | $headers = $this->headers; |
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| 270 | |||
| 271 | if ($this->isInformational() || $this->isEmpty()) { |
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| 272 | $this->setContent(null); |
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| 273 | $headers->remove('Content-Type'); |
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| 274 | $headers->remove('Content-Length'); |
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| 275 | } else { |
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| 276 | // Content-type based on the Request |
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| 277 | if (!$headers->has('Content-Type')) { |
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| 278 | $format = $request->getRequestFormat(); |
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| 279 | if (null !== $format && $mimeType = $request->getMimeType($format)) { |
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| 280 | $headers->set('Content-Type', $mimeType); |
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| 281 | } |
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| 282 | } |
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| 283 | |||
| 284 | // Fix Content-Type |
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| 285 | $charset = $this->charset ?: 'UTF-8'; |
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| 286 | if (!$headers->has('Content-Type')) { |
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| 287 | $headers->set('Content-Type', 'text/html; charset='.$charset); |
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| 288 | } elseif (0 === stripos($headers->get('Content-Type'), 'text/') && false === stripos($headers->get('Content-Type'), 'charset')) { |
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| 289 | // add the charset |
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| 290 | $headers->set('Content-Type', $headers->get('Content-Type').'; charset='.$charset); |
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| 291 | } |
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| 292 | |||
| 293 | // Fix Content-Length |
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| 294 | if ($headers->has('Transfer-Encoding')) { |
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| 295 | $headers->remove('Content-Length'); |
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| 296 | } |
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| 297 | |||
| 298 | if ($request->isMethod('HEAD')) { |
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| 299 | // cf. RFC2616 14.13 |
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| 300 | $length = $headers->get('Content-Length'); |
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| 301 | $this->setContent(null); |
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| 302 | if ($length) { |
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| 303 | $headers->set('Content-Length', $length); |
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| 304 | } |
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| 305 | } |
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| 306 | } |
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| 307 | |||
| 308 | // Fix protocol |
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| 309 | if ('HTTP/1.0' != $request->server->get('SERVER_PROTOCOL')) { |
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| 310 | $this->setProtocolVersion('1.1'); |
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| 311 | } |
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| 312 | |||
| 313 | // Check if we need to send extra expire info headers |
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| 314 | if ('1.0' == $this->getProtocolVersion() && 'no-cache' == $this->headers->get('Cache-Control')) { |
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| 315 | $this->headers->set('pragma', 'no-cache'); |
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| 316 | $this->headers->set('expires', -1); |
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| 317 | } |
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| 318 | |||
| 319 | $this->ensureIEOverSSLCompatibility($request); |
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| 320 | |||
| 321 | return $this; |
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| 322 | } |
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| 323 | |||
| 324 | /** |
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| 325 | * Sends HTTP headers. |
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| 326 | * |
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| 327 | * @return $this |
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| 328 | */ |
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| 329 | public function sendHeaders() |
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| 330 | { |
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| 331 | // headers have already been sent by the developer |
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| 332 | if (headers_sent()) { |
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| 333 | return $this; |
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| 334 | } |
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| 335 | |||
| 336 | // headers |
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| 337 | foreach ($this->headers->allPreserveCase() as $name => $values) { |
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| 338 | foreach ($values as $value) { |
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| 339 | header($name.': '.$value, false); |
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| 340 | } |
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| 341 | } |
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| 342 | |||
| 343 | // status |
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| 344 | header(sprintf('HTTP/%s %s %s', $this->version, $this->statusCode, $this->statusText), true, $this->statusCode); |
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| 345 | |||
| 346 | // cookies |
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| 347 | foreach ($this->headers->getCookies() as $cookie) { |
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| 348 | setcookie($cookie->getName(), $cookie->getValue(), $cookie->getExpiresTime(), $cookie->getPath(), $cookie->getDomain(), $cookie->isSecure(), $cookie->isHttpOnly()); |
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| 349 | } |
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| 350 | |||
| 351 | return $this; |
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| 352 | } |
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| 353 | |||
| 354 | /** |
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| 355 | * Sends content for the current web response. |
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| 356 | * |
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| 357 | * @return $this |
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| 358 | */ |
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| 359 | public function sendContent() |
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| 360 | { |
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| 361 | echo $this->content; |
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| 362 | |||
| 363 | return $this; |
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| 364 | } |
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| 365 | |||
| 366 | /** |
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| 367 | * Sends HTTP headers and content. |
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| 368 | * |
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| 369 | * @return $this |
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| 370 | */ |
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| 371 | public function send() |
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| 372 | { |
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| 373 | $this->sendHeaders(); |
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| 374 | $this->sendContent(); |
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| 375 | |||
| 376 | if (function_exists('fastcgi_finish_request')) { |
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| 377 | fastcgi_finish_request(); |
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| 378 | } elseif ('cli' !== PHP_SAPI) { |
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| 379 | static::closeOutputBuffers(0, true); |
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| 380 | } |
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| 381 | |||
| 382 | return $this; |
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| 383 | } |
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| 384 | |||
| 385 | /** |
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| 386 | * Sets the response content. |
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| 387 | * |
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| 388 | * Valid types are strings, numbers, null, and objects that implement a __toString() method. |
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| 389 | * |
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| 390 | * @param mixed $content Content that can be cast to string |
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| 391 | * |
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| 392 | * @return $this |
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| 393 | * |
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| 394 | * @throws \UnexpectedValueException |
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| 395 | */ |
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| 396 | public function setContent($content) |
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| 397 | { |
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| 398 | if (null !== $content && !is_string($content) && !is_numeric($content) && !is_callable(array($content, '__toString'))) { |
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| 399 | throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', gettype($content))); |
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| 400 | } |
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| 401 | |||
| 402 | $this->content = (string) $content; |
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| 403 | |||
| 404 | return $this; |
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| 405 | } |
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| 406 | |||
| 407 | /** |
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| 408 | * Gets the current response content. |
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| 409 | * |
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| 410 | * @return string Content |
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| 411 | */ |
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| 412 | public function getContent() |
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| 413 | { |
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| 414 | return $this->content; |
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| 415 | } |
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| 416 | |||
| 417 | /** |
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| 418 | * Sets the HTTP protocol version (1.0 or 1.1). |
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| 419 | * |
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| 420 | * @param string $version The HTTP protocol version |
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| 421 | * |
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| 422 | * @return $this |
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| 423 | */ |
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| 424 | public function setProtocolVersion($version) |
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| 425 | { |
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| 426 | $this->version = $version; |
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| 427 | |||
| 428 | return $this; |
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| 429 | } |
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| 430 | |||
| 431 | /** |
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| 432 | * Gets the HTTP protocol version. |
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| 433 | * |
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| 434 | * @return string The HTTP protocol version |
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| 435 | */ |
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| 436 | public function getProtocolVersion() |
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| 437 | { |
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| 438 | return $this->version; |
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| 439 | } |
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| 440 | |||
| 441 | /** |
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| 442 | * Sets the response status code. |
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| 443 | * |
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| 444 | * @param int $code HTTP status code |
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| 445 | * @param mixed $text HTTP status text |
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| 446 | * |
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| 447 | * If the status text is null it will be automatically populated for the known |
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| 448 | * status codes and left empty otherwise. |
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| 449 | * |
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| 450 | * @return $this |
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| 451 | * |
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| 452 | * @throws \InvalidArgumentException When the HTTP status code is not valid |
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| 453 | */ |
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| 454 | public function setStatusCode($code, $text = null) |
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| 455 | { |
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| 456 | $this->statusCode = $code = (int) $code; |
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| 457 | if ($this->isInvalid()) { |
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| 458 | throw new \InvalidArgumentException(sprintf('The HTTP status code "%s" is not valid.', $code)); |
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| 459 | } |
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| 460 | |||
| 461 | if (null === $text) { |
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| 462 | $this->statusText = isset(self::$statusTexts[$code]) ? self::$statusTexts[$code] : 'unknown status'; |
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| 463 | |||
| 464 | return $this; |
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| 465 | } |
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| 466 | |||
| 467 | if (false === $text) { |
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| 468 | $this->statusText = ''; |
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| 469 | |||
| 470 | return $this; |
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| 471 | } |
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| 472 | |||
| 473 | $this->statusText = $text; |
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| 474 | |||
| 475 | return $this; |
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| 476 | } |
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| 477 | |||
| 478 | /** |
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| 479 | * Retrieves the status code for the current web response. |
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| 480 | * |
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| 481 | * @return int Status code |
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| 482 | */ |
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| 483 | public function getStatusCode() |
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| 484 | { |
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| 485 | return $this->statusCode; |
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| 486 | } |
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| 487 | |||
| 488 | /** |
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| 489 | * Sets the response charset. |
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| 490 | * |
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| 491 | * @param string $charset Character set |
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| 492 | * |
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| 493 | * @return $this |
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| 494 | */ |
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| 495 | public function setCharset($charset) |
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| 496 | { |
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| 497 | $this->charset = $charset; |
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| 498 | |||
| 499 | return $this; |
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| 500 | } |
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| 501 | |||
| 502 | /** |
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| 503 | * Retrieves the response charset. |
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| 504 | * |
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| 505 | * @return string Character set |
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| 506 | */ |
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| 507 | public function getCharset() |
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| 508 | { |
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| 509 | return $this->charset; |
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| 510 | } |
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| 511 | |||
| 512 | /** |
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| 513 | * Returns true if the response is worth caching under any circumstance. |
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| 514 | * |
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| 515 | * Responses marked "private" with an explicit Cache-Control directive are |
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| 516 | * considered uncacheable. |
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| 517 | * |
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| 518 | * Responses with neither a freshness lifetime (Expires, max-age) nor cache |
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| 519 | * validator (Last-Modified, ETag) are considered uncacheable. |
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| 520 | * |
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| 521 | * @return bool true if the response is worth caching, false otherwise |
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| 522 | */ |
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| 523 | public function isCacheable() |
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| 524 | { |
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| 525 | if (!in_array($this->statusCode, array(200, 203, 300, 301, 302, 404, 410))) { |
||
| 526 | return false; |
||
| 527 | } |
||
| 528 | |||
| 529 | if ($this->headers->hasCacheControlDirective('no-store') || $this->headers->getCacheControlDirective('private')) { |
||
| 530 | return false; |
||
| 531 | } |
||
| 532 | |||
| 533 | return $this->isValidateable() || $this->isFresh(); |
||
| 534 | } |
||
| 535 | |||
| 536 | /** |
||
| 537 | * Returns true if the response is "fresh". |
||
| 538 | * |
||
| 539 | * Fresh responses may be served from cache without any interaction with the |
||
| 540 | * origin. A response is considered fresh when it includes a Cache-Control/max-age |
||
| 541 | * indicator or Expires header and the calculated age is less than the freshness lifetime. |
||
| 542 | * |
||
| 543 | * @return bool true if the response is fresh, false otherwise |
||
| 544 | */ |
||
| 545 | public function isFresh() |
||
| 546 | { |
||
| 547 | return $this->getTtl() > 0; |
||
| 548 | } |
||
| 549 | |||
| 550 | /** |
||
| 551 | * Returns true if the response includes headers that can be used to validate |
||
| 552 | * the response with the origin server using a conditional GET request. |
||
| 553 | * |
||
| 554 | * @return bool true if the response is validateable, false otherwise |
||
| 555 | */ |
||
| 556 | public function isValidateable() |
||
| 557 | { |
||
| 558 | return $this->headers->has('Last-Modified') || $this->headers->has('ETag'); |
||
| 559 | } |
||
| 560 | |||
| 561 | /** |
||
| 562 | * Marks the response as "private". |
||
| 563 | * |
||
| 564 | * It makes the response ineligible for serving other clients. |
||
| 565 | * |
||
| 566 | * @return $this |
||
| 567 | */ |
||
| 568 | public function setPrivate() |
||
| 569 | { |
||
| 570 | $this->headers->removeCacheControlDirective('public'); |
||
| 571 | $this->headers->addCacheControlDirective('private'); |
||
| 572 | |||
| 573 | return $this; |
||
| 574 | } |
||
| 575 | |||
| 576 | /** |
||
| 577 | * Marks the response as "public". |
||
| 578 | * |
||
| 579 | * It makes the response eligible for serving other clients. |
||
| 580 | * |
||
| 581 | * @return $this |
||
| 582 | */ |
||
| 583 | public function setPublic() |
||
| 584 | { |
||
| 585 | $this->headers->addCacheControlDirective('public'); |
||
| 586 | $this->headers->removeCacheControlDirective('private'); |
||
| 587 | |||
| 588 | return $this; |
||
| 589 | } |
||
| 590 | |||
| 591 | /** |
||
| 592 | * Returns true if the response must be revalidated by caches. |
||
| 593 | * |
||
| 594 | * This method indicates that the response must not be served stale by a |
||
| 595 | * cache in any circumstance without first revalidating with the origin. |
||
| 596 | * When present, the TTL of the response should not be overridden to be |
||
| 597 | * greater than the value provided by the origin. |
||
| 598 | * |
||
| 599 | * @return bool true if the response must be revalidated by a cache, false otherwise |
||
| 600 | */ |
||
| 601 | public function mustRevalidate() |
||
| 602 | { |
||
| 603 | return $this->headers->hasCacheControlDirective('must-revalidate') || $this->headers->hasCacheControlDirective('proxy-revalidate'); |
||
| 604 | } |
||
| 605 | |||
| 606 | /** |
||
| 607 | * Returns the Date header as a DateTime instance. |
||
| 608 | * |
||
| 609 | * @return \DateTime A \DateTime instance |
||
| 610 | * |
||
| 611 | * @throws \RuntimeException When the header is not parseable |
||
| 612 | */ |
||
| 613 | public function getDate() |
||
| 614 | { |
||
| 615 | return $this->headers->getDate('Date', new \DateTime()); |
||
| 616 | } |
||
| 617 | |||
| 618 | /** |
||
| 619 | * Sets the Date header. |
||
| 620 | * |
||
| 621 | * @param \DateTime $date A \DateTime instance |
||
| 622 | * |
||
| 623 | * @return $this |
||
| 624 | */ |
||
| 625 | public function setDate(\DateTime $date) |
||
| 626 | { |
||
| 627 | $date->setTimezone(new \DateTimeZone('UTC')); |
||
| 628 | $this->headers->set('Date', $date->format('D, d M Y H:i:s').' GMT'); |
||
| 629 | |||
| 630 | return $this; |
||
| 631 | } |
||
| 632 | |||
| 633 | /** |
||
| 634 | * Returns the age of the response. |
||
| 635 | * |
||
| 636 | * @return int The age of the response in seconds |
||
| 637 | */ |
||
| 638 | public function getAge() |
||
| 639 | { |
||
| 640 | if (null !== $age = $this->headers->get('Age')) { |
||
|
introduced
by
|
|||
| 641 | return (int) $age; |
||
| 642 | } |
||
| 643 | |||
| 644 | return max(time() - $this->getDate()->format('U'), 0); |
||
| 645 | } |
||
| 646 | |||
| 647 | /** |
||
| 648 | * Marks the response stale by setting the Age header to be equal to the maximum age of the response. |
||
| 649 | * |
||
| 650 | * @return $this |
||
| 651 | */ |
||
| 652 | public function expire() |
||
| 653 | { |
||
| 654 | if ($this->isFresh()) { |
||
| 655 | $this->headers->set('Age', $this->getMaxAge()); |
||
| 656 | } |
||
| 657 | |||
| 658 | return $this; |
||
| 659 | } |
||
| 660 | |||
| 661 | /** |
||
| 662 | * Returns the value of the Expires header as a DateTime instance. |
||
| 663 | * |
||
| 664 | * @return \DateTime|null A DateTime instance or null if the header does not exist |
||
| 665 | */ |
||
| 666 | public function getExpires() |
||
| 667 | { |
||
| 668 | try { |
||
| 669 | return $this->headers->getDate('Expires'); |
||
| 670 | } catch (\RuntimeException $e) { |
||
| 671 | // according to RFC 2616 invalid date formats (e.g. "0" and "-1") must be treated as in the past |
||
| 672 | return \DateTime::createFromFormat(DATE_RFC2822, 'Sat, 01 Jan 00 00:00:00 +0000'); |
||
| 673 | } |
||
| 674 | } |
||
| 675 | |||
| 676 | /** |
||
| 677 | * Sets the Expires HTTP header with a DateTime instance. |
||
| 678 | * |
||
| 679 | * Passing null as value will remove the header. |
||
| 680 | * |
||
| 681 | * @param \DateTime|null $date A \DateTime instance or null to remove the header |
||
| 682 | * |
||
| 683 | * @return $this |
||
| 684 | */ |
||
| 685 | public function setExpires(\DateTime $date = null) |
||
| 686 | { |
||
| 687 | if (null === $date) { |
||
| 688 | $this->headers->remove('Expires'); |
||
| 689 | } else { |
||
| 690 | $date = clone $date; |
||
| 691 | $date->setTimezone(new \DateTimeZone('UTC')); |
||
| 692 | $this->headers->set('Expires', $date->format('D, d M Y H:i:s').' GMT'); |
||
| 693 | } |
||
| 694 | |||
| 695 | return $this; |
||
| 696 | } |
||
| 697 | |||
| 698 | /** |
||
| 699 | * Returns the number of seconds after the time specified in the response's Date |
||
| 700 | * header when the response should no longer be considered fresh. |
||
| 701 | * |
||
| 702 | * First, it checks for a s-maxage directive, then a max-age directive, and then it falls |
||
| 703 | * back on an expires header. It returns null when no maximum age can be established. |
||
| 704 | * |
||
| 705 | * @return int|null Number of seconds |
||
| 706 | */ |
||
| 707 | public function getMaxAge() |
||
| 708 | { |
||
| 709 | if ($this->headers->hasCacheControlDirective('s-maxage')) { |
||
| 710 | return (int) $this->headers->getCacheControlDirective('s-maxage'); |
||
| 711 | } |
||
| 712 | |||
| 713 | if ($this->headers->hasCacheControlDirective('max-age')) { |
||
| 714 | return (int) $this->headers->getCacheControlDirective('max-age'); |
||
| 715 | } |
||
| 716 | |||
| 717 | if (null !== $this->getExpires()) { |
||
| 718 | return $this->getExpires()->format('U') - $this->getDate()->format('U'); |
||
| 719 | } |
||
| 720 | } |
||
| 721 | |||
| 722 | /** |
||
| 723 | * Sets the number of seconds after which the response should no longer be considered fresh. |
||
| 724 | * |
||
| 725 | * This methods sets the Cache-Control max-age directive. |
||
| 726 | * |
||
| 727 | * @param int $value Number of seconds |
||
| 728 | * |
||
| 729 | * @return $this |
||
| 730 | */ |
||
| 731 | public function setMaxAge($value) |
||
| 736 | } |
||
| 737 | |||
| 738 | /** |
||
| 739 | * Sets the number of seconds after which the response should no longer be considered fresh by shared caches. |
||
| 740 | * |
||
| 741 | * This methods sets the Cache-Control s-maxage directive. |
||
| 742 | * |
||
| 743 | * @param int $value Number of seconds |
||
| 744 | * |
||
| 745 | * @return $this |
||
| 746 | */ |
||
| 747 | public function setSharedMaxAge($value) |
||
| 748 | { |
||
| 749 | $this->setPublic(); |
||
| 750 | $this->headers->addCacheControlDirective('s-maxage', $value); |
||
| 751 | |||
| 752 | return $this; |
||
| 753 | } |
||
| 754 | |||
| 755 | /** |
||
| 756 | * Returns the response's time-to-live in seconds. |
||
| 757 | * |
||
| 758 | * It returns null when no freshness information is present in the response. |
||
| 759 | * |
||
| 760 | * When the responses TTL is <= 0, the response may not be served from cache without first |
||
| 761 | * revalidating with the origin. |
||
| 762 | * |
||
| 763 | * @return int|null The TTL in seconds |
||
| 764 | */ |
||
| 765 | public function getTtl() |
||
| 766 | { |
||
| 767 | if (null !== $maxAge = $this->getMaxAge()) { |
||
| 768 | return $maxAge - $this->getAge(); |
||
| 769 | } |
||
| 770 | } |
||
| 771 | |||
| 772 | /** |
||
| 773 | * Sets the response's time-to-live for shared caches. |
||
| 774 | * |
||
| 775 | * This method adjusts the Cache-Control/s-maxage directive. |
||
| 776 | * |
||
| 777 | * @param int $seconds Number of seconds |
||
| 778 | * |
||
| 779 | * @return $this |
||
| 780 | */ |
||
| 781 | public function setTtl($seconds) |
||
| 782 | { |
||
| 783 | $this->setSharedMaxAge($this->getAge() + $seconds); |
||
| 784 | |||
| 785 | return $this; |
||
| 786 | } |
||
| 787 | |||
| 788 | /** |
||
| 789 | * Sets the response's time-to-live for private/client caches. |
||
| 790 | * |
||
| 791 | * This method adjusts the Cache-Control/max-age directive. |
||
| 792 | * |
||
| 793 | * @param int $seconds Number of seconds |
||
| 794 | * |
||
| 795 | * @return $this |
||
| 796 | */ |
||
| 797 | public function setClientTtl($seconds) |
||
| 798 | { |
||
| 799 | $this->setMaxAge($this->getAge() + $seconds); |
||
| 800 | |||
| 801 | return $this; |
||
| 802 | } |
||
| 803 | |||
| 804 | /** |
||
| 805 | * Returns the Last-Modified HTTP header as a DateTime instance. |
||
| 806 | * |
||
| 807 | * @return \DateTime|null A DateTime instance or null if the header does not exist |
||
| 808 | * |
||
| 809 | * @throws \RuntimeException When the HTTP header is not parseable |
||
| 810 | */ |
||
| 811 | public function getLastModified() |
||
| 812 | { |
||
| 813 | return $this->headers->getDate('Last-Modified'); |
||
| 814 | } |
||
| 815 | |||
| 816 | /** |
||
| 817 | * Sets the Last-Modified HTTP header with a DateTime instance. |
||
| 818 | * |
||
| 819 | * Passing null as value will remove the header. |
||
| 820 | * |
||
| 821 | * @param \DateTime|null $date A \DateTime instance or null to remove the header |
||
| 822 | * |
||
| 823 | * @return $this |
||
| 824 | */ |
||
| 825 | public function setLastModified(\DateTime $date = null) |
||
| 826 | { |
||
| 827 | if (null === $date) { |
||
| 828 | $this->headers->remove('Last-Modified'); |
||
| 829 | } else { |
||
| 830 | $date = clone $date; |
||
| 831 | $date->setTimezone(new \DateTimeZone('UTC')); |
||
| 832 | $this->headers->set('Last-Modified', $date->format('D, d M Y H:i:s').' GMT'); |
||
| 833 | } |
||
| 834 | |||
| 835 | return $this; |
||
| 836 | } |
||
| 837 | |||
| 838 | /** |
||
| 839 | * Returns the literal value of the ETag HTTP header. |
||
| 840 | * |
||
| 841 | * @return string|null The ETag HTTP header or null if it does not exist |
||
| 842 | */ |
||
| 843 | public function getEtag() |
||
| 844 | { |
||
| 845 | return $this->headers->get('ETag'); |
||
| 846 | } |
||
| 847 | |||
| 848 | /** |
||
| 849 | * Sets the ETag value. |
||
| 850 | * |
||
| 851 | * @param string|null $etag The ETag unique identifier or null to remove the header |
||
| 852 | * @param bool $weak Whether you want a weak ETag or not |
||
| 853 | * |
||
| 854 | * @return $this |
||
| 855 | */ |
||
| 856 | public function setEtag($etag = null, $weak = false) |
||
| 857 | { |
||
| 858 | if (null === $etag) { |
||
| 859 | $this->headers->remove('Etag'); |
||
| 860 | } else { |
||
| 861 | if (0 !== strpos($etag, '"')) { |
||
| 862 | $etag = '"'.$etag.'"'; |
||
| 863 | } |
||
| 864 | |||
| 865 | $this->headers->set('ETag', (true === $weak ? 'W/' : '').$etag); |
||
| 866 | } |
||
| 867 | |||
| 868 | return $this; |
||
| 869 | } |
||
| 870 | |||
| 871 | /** |
||
| 872 | * Sets the response's cache headers (validation and/or expiration). |
||
| 873 | * |
||
| 874 | * Available options are: etag, last_modified, max_age, s_maxage, private, and public. |
||
| 875 | * |
||
| 876 | * @param array $options An array of cache options |
||
| 877 | * |
||
| 878 | * @return $this |
||
| 879 | * |
||
| 880 | * @throws \InvalidArgumentException |
||
| 881 | */ |
||
| 882 | public function setCache(array $options) |
||
| 883 | { |
||
| 884 | if ($diff = array_diff(array_keys($options), array('etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public'))) { |
||
| 885 | throw new \InvalidArgumentException(sprintf('Response does not support the following options: "%s".', implode('", "', array_values($diff)))); |
||
| 886 | } |
||
| 887 | |||
| 888 | if (isset($options['etag'])) { |
||
| 889 | $this->setEtag($options['etag']); |
||
| 890 | } |
||
| 891 | |||
| 892 | if (isset($options['last_modified'])) { |
||
| 893 | $this->setLastModified($options['last_modified']); |
||
| 894 | } |
||
| 895 | |||
| 896 | if (isset($options['max_age'])) { |
||
| 897 | $this->setMaxAge($options['max_age']); |
||
| 898 | } |
||
| 899 | |||
| 900 | if (isset($options['s_maxage'])) { |
||
| 901 | $this->setSharedMaxAge($options['s_maxage']); |
||
| 902 | } |
||
| 903 | |||
| 904 | if (isset($options['public'])) { |
||
| 905 | if ($options['public']) { |
||
| 906 | $this->setPublic(); |
||
| 907 | } else { |
||
| 908 | $this->setPrivate(); |
||
| 909 | } |
||
| 910 | } |
||
| 911 | |||
| 912 | if (isset($options['private'])) { |
||
| 913 | if ($options['private']) { |
||
| 914 | $this->setPrivate(); |
||
| 915 | } else { |
||
| 916 | $this->setPublic(); |
||
| 917 | } |
||
| 918 | } |
||
| 919 | |||
| 920 | return $this; |
||
| 921 | } |
||
| 922 | |||
| 923 | /** |
||
| 924 | * Modifies the response so that it conforms to the rules defined for a 304 status code. |
||
| 925 | * |
||
| 926 | * This sets the status, removes the body, and discards any headers |
||
| 927 | * that MUST NOT be included in 304 responses. |
||
| 928 | * |
||
| 929 | * @return $this |
||
| 930 | * |
||
| 931 | * @see http://tools.ietf.org/html/rfc2616#section-10.3.5 |
||
| 932 | */ |
||
| 933 | public function setNotModified() |
||
| 934 | { |
||
| 935 | $this->setStatusCode(304); |
||
| 936 | $this->setContent(null); |
||
| 937 | |||
| 938 | // remove headers that MUST NOT be included with 304 Not Modified responses |
||
| 939 | foreach (array('Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified') as $header) { |
||
| 940 | $this->headers->remove($header); |
||
| 941 | } |
||
| 942 | |||
| 943 | return $this; |
||
| 944 | } |
||
| 945 | |||
| 946 | /** |
||
| 947 | * Returns true if the response includes a Vary header. |
||
| 948 | * |
||
| 949 | * @return bool true if the response includes a Vary header, false otherwise |
||
| 950 | */ |
||
| 951 | public function hasVary() |
||
| 952 | { |
||
| 953 | return null !== $this->headers->get('Vary'); |
||
| 954 | } |
||
| 955 | |||
| 956 | /** |
||
| 957 | * Returns an array of header names given in the Vary header. |
||
| 958 | * |
||
| 959 | * @return array An array of Vary names |
||
| 960 | */ |
||
| 961 | public function getVary() |
||
| 962 | { |
||
| 963 | if (!$vary = $this->headers->get('Vary', null, false)) { |
||
| 964 | return array(); |
||
| 965 | } |
||
| 966 | |||
| 967 | $ret = array(); |
||
| 968 | foreach ($vary as $item) { |
||
| 969 | $ret = array_merge($ret, preg_split('/[\s,]+/', $item)); |
||
| 970 | } |
||
| 971 | |||
| 972 | return $ret; |
||
| 973 | } |
||
| 974 | |||
| 975 | /** |
||
| 976 | * Sets the Vary header. |
||
| 977 | * |
||
| 978 | * @param string|array $headers |
||
| 979 | * @param bool $replace Whether to replace the actual value or not (true by default) |
||
| 980 | * |
||
| 981 | * @return $this |
||
| 982 | */ |
||
| 983 | public function setVary($headers, $replace = true) |
||
| 984 | { |
||
| 985 | $this->headers->set('Vary', $headers, $replace); |
||
| 986 | |||
| 987 | return $this; |
||
| 988 | } |
||
| 989 | |||
| 990 | /** |
||
| 991 | * Determines if the Response validators (ETag, Last-Modified) match |
||
| 992 | * a conditional value specified in the Request. |
||
| 993 | * |
||
| 994 | * If the Response is not modified, it sets the status code to 304 and |
||
| 995 | * removes the actual content by calling the setNotModified() method. |
||
| 996 | * |
||
| 997 | * @param Request $request A Request instance |
||
| 998 | * |
||
| 999 | * @return bool true if the Response validators match the Request, false otherwise |
||
| 1000 | */ |
||
| 1001 | public function isNotModified(Request $request) |
||
| 1002 | { |
||
| 1003 | if (!$request->isMethodCacheable()) { |
||
| 1004 | return false; |
||
| 1005 | } |
||
| 1006 | |||
| 1007 | $notModified = false; |
||
| 1008 | $lastModified = $this->headers->get('Last-Modified'); |
||
| 1009 | $modifiedSince = $request->headers->get('If-Modified-Since'); |
||
| 1010 | |||
| 1011 | if ($etags = $request->getETags()) { |
||
| 1012 | $notModified = in_array($this->getEtag(), $etags) || in_array('*', $etags); |
||
| 1013 | } |
||
| 1014 | |||
| 1015 | if ($modifiedSince && $lastModified) { |
||
| 1016 | $notModified = strtotime($modifiedSince) >= strtotime($lastModified) && (!$etags || $notModified); |
||
| 1017 | } |
||
| 1018 | |||
| 1019 | if ($notModified) { |
||
| 1020 | $this->setNotModified(); |
||
| 1021 | } |
||
| 1022 | |||
| 1023 | return $notModified; |
||
| 1024 | } |
||
| 1025 | |||
| 1026 | /** |
||
| 1027 | * Is response invalid? |
||
| 1028 | * |
||
| 1029 | * @return bool |
||
| 1030 | * |
||
| 1031 | * @see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html |
||
| 1032 | */ |
||
| 1033 | public function isInvalid() |
||
| 1034 | { |
||
| 1035 | return $this->statusCode < 100 || $this->statusCode >= 600; |
||
| 1036 | } |
||
| 1037 | |||
| 1038 | /** |
||
| 1039 | * Is response informative? |
||
| 1040 | * |
||
| 1041 | * @return bool |
||
| 1042 | */ |
||
| 1043 | public function isInformational() |
||
| 1044 | { |
||
| 1045 | return $this->statusCode >= 100 && $this->statusCode < 200; |
||
| 1046 | } |
||
| 1047 | |||
| 1048 | /** |
||
| 1049 | * Is response successful? |
||
| 1050 | * |
||
| 1051 | * @return bool |
||
| 1052 | */ |
||
| 1053 | public function isSuccessful() |
||
| 1056 | } |
||
| 1057 | |||
| 1058 | /** |
||
| 1059 | * Is the response a redirect? |
||
| 1060 | * |
||
| 1061 | * @return bool |
||
| 1062 | */ |
||
| 1063 | public function isRedirection() |
||
| 1066 | } |
||
| 1067 | |||
| 1068 | /** |
||
| 1069 | * Is there a client error? |
||
| 1070 | * |
||
| 1071 | * @return bool |
||
| 1072 | */ |
||
| 1073 | public function isClientError() |
||
| 1074 | { |
||
| 1075 | return $this->statusCode >= 400 && $this->statusCode < 500; |
||
| 1076 | } |
||
| 1077 | |||
| 1078 | /** |
||
| 1079 | * Was there a server side error? |
||
| 1080 | * |
||
| 1081 | * @return bool |
||
| 1082 | */ |
||
| 1083 | public function isServerError() |
||
| 1084 | { |
||
| 1085 | return $this->statusCode >= 500 && $this->statusCode < 600; |
||
| 1086 | } |
||
| 1087 | |||
| 1088 | /** |
||
| 1089 | * Is the response OK? |
||
| 1090 | * |
||
| 1091 | * @return bool |
||
| 1092 | */ |
||
| 1093 | public function isOk() |
||
| 1094 | { |
||
| 1095 | return 200 === $this->statusCode; |
||
| 1096 | } |
||
| 1097 | |||
| 1098 | /** |
||
| 1099 | * Is the response forbidden? |
||
| 1100 | * |
||
| 1101 | * @return bool |
||
| 1102 | */ |
||
| 1103 | public function isForbidden() |
||
| 1106 | } |
||
| 1107 | |||
| 1108 | /** |
||
| 1109 | * Is the response a not found error? |
||
| 1110 | * |
||
| 1111 | * @return bool |
||
| 1112 | */ |
||
| 1113 | public function isNotFound() |
||
| 1114 | { |
||
| 1115 | return 404 === $this->statusCode; |
||
| 1116 | } |
||
| 1117 | |||
| 1118 | /** |
||
| 1119 | * Is the response a redirect of some form? |
||
| 1120 | * |
||
| 1121 | * @param string $location |
||
| 1122 | * |
||
| 1123 | * @return bool |
||
| 1124 | */ |
||
| 1125 | public function isRedirect($location = null) |
||
| 1126 | { |
||
| 1127 | return in_array($this->statusCode, array(201, 301, 302, 303, 307, 308)) && (null === $location ?: $location == $this->headers->get('Location')); |
||
| 1128 | } |
||
| 1129 | |||
| 1130 | /** |
||
| 1131 | * Is the response empty? |
||
| 1132 | * |
||
| 1133 | * @return bool |
||
| 1134 | */ |
||
| 1135 | public function isEmpty() |
||
| 1136 | { |
||
| 1137 | return in_array($this->statusCode, array(204, 304)); |
||
| 1138 | } |
||
| 1139 | |||
| 1140 | /** |
||
| 1141 | * Cleans or flushes output buffers up to target level. |
||
| 1142 | * |
||
| 1143 | * Resulting level can be greater than target level if a non-removable buffer has been encountered. |
||
| 1144 | * |
||
| 1145 | * @param int $targetLevel The target output buffering level |
||
| 1146 | * @param bool $flush Whether to flush or clean the buffers |
||
| 1147 | */ |
||
| 1148 | public static function closeOutputBuffers($targetLevel, $flush) |
||
| 1159 | } |
||
| 1160 | } |
||
| 1161 | } |
||
| 1162 | |||
| 1163 | /** |
||
| 1164 | * Checks if we need to remove Cache-Control for SSL encrypted downloads when using IE < 9. |
||
| 1165 | * |
||
| 1166 | * @see http://support.microsoft.com/kb/323308 |
||
| 1167 | */ |
||
| 1168 | protected function ensureIEOverSSLCompatibility(Request $request) |
||
| 1169 | { |
||
| 1170 | if (false !== stripos($this->headers->get('Content-Disposition'), 'attachment') && preg_match('/MSIE (.*?);/i', $request->server->get('HTTP_USER_AGENT'), $match) == 1 && true === $request->isSecure()) { |
||
| 1171 | if ((int) preg_replace('/(MSIE )(.*?);/', '$2', $match[0]) < 9) { |
||
| 1172 | $this->headers->remove('Cache-Control'); |
||
| 1173 | } |
||
| 1174 | } |
||
| 1175 | } |
||
| 1176 | } |
||
| 1177 |
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