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<?php |
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namespace Kambo\Http\Message; |
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/** |
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* Headers |
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* |
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* This class represents a collection of HTTP headers that is used in HTTP |
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* request and response objects. |
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* |
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* @package Kambo\Http\Message |
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* @author Bohuslav Simek <[email protected]> |
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* @license MIT |
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*/ |
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class Headers |
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{ |
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/** |
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* List of headers name that should not be normalized. |
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* |
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* @var array |
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*/ |
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private $ignoreProcessing = [ |
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"user-agent" => true |
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]; |
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/** |
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* Header data |
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* |
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* @var array|null |
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*/ |
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private $data; |
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/** |
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* Constructor |
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* |
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* @param array|null $headers |
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* |
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*/ |
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public function __construct( |
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$headers = null |
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) { |
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if (isset($headers)) { |
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$headers = $this->normalizeHeaders($headers); |
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} |
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$this->data = $headers; |
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} |
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/** |
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* Add header value |
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* If the header already exists data are merged, method DOES NOT replace previous value. |
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* |
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* @param string $name Name of the header. |
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* @param mixed $value Value of the header can be scalar data type or string. |
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* |
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* @return void |
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*/ |
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public function add($name, $value) |
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{ |
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$name = $this->normalizeName($name); |
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$newValues = is_array($value) ? $value : [$value]; |
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$data = []; |
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if (isset($this->data[$name])) { |
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$data = $this->data[$name]; |
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} |
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$this->data[$name] = array_merge($data, $newValues); |
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} |
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/** |
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* Set header value |
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* If the header already exist value will be replaced. |
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* |
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* @param string $name Name of the header. |
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* @param mixed $value Value of the header can be scalar data type or string. |
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* |
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* @return void |
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*/ |
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public function set($name, $value) |
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{ |
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$name = $this->normalizeName($name); |
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$newValues = is_array($value) ? $value : [$value]; |
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$this->data[$name] = $newValues; |
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} |
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/** |
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* Get header by provided name |
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* |
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* @param string $name Name of the header. |
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* |
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* @return mixed value of header |
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*/ |
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public function get($name) |
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{ |
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$name = $this->normalizeName($name); |
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$data = []; |
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if (isset($this->data[$name])) { |
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$data = $this->data[$name]; |
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} |
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return $data; |
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} |
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/** |
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* Get header values separated by comma |
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* |
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* @param string $name Name of the header. |
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* |
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* @return string value of header separated by comma |
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*/ |
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public function getLine($name) |
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{ |
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$line = $this->get($name); |
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return implode(',', $line); |
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} |
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/** |
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* Get all headers |
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* |
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* @return array value of all headers |
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*/ |
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public function all() |
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{ |
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return $this->data; |
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} |
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/** |
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* Remove header by provided name |
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* |
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* @param string $name Name of the header. |
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* |
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* @return self |
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*/ |
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public function remove($name) |
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{ |
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$name = $this->normalizeName($name); |
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if (isset($this->data[$name])) { |
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unset($this->data[$name]); |
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} |
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return $this; |
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} |
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/** |
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* Check if header exist |
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* |
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* @param string $name Name of the header. |
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* |
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* @return boolean Returns TRUE if exists or FALSE if not. |
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*/ |
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public function exists($name) |
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{ |
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return isset($this->data[$this->normalizeName($name)]); |
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} |
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// ------------ PRIVATE METHODS |
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/** |
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* Normalize headers values |
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* |
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* @param array $headers Headers for normalization. |
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* |
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* @return array Normalized header data. |
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*/ |
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private function normalizeHeaders($headers) |
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{ |
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$normalized = []; |
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foreach ($headers as $name => $value) { |
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$name = $this->normalizeName($name); |
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$normalized[$name] = $this->normalizeData($name, $value); |
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} |
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return $normalized; |
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} |
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/** |
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* Normalize header value |
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* |
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* @param string $name Name of header - some headers should not be normalized. |
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* @param string $data Header data for normalization. |
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* |
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* @return array Normalized value of header |
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*/ |
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private function normalizeData($name, $data) |
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{ |
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if (!isset($this->ignoreProcessing[$name])) { |
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return array_map('trim', explode(',', $data)); |
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} else { |
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return [$data]; |
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} |
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} |
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/** |
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* Normalize header name |
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* |
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* @param string $name Name of header for normalization |
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* |
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* @return string Normalized name of header |
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*/ |
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private function normalizeName($name) |
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{ |
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$name = strtr(strtolower($name), '_', '-'); |
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if (strpos($name, 'http-') === 0) { |
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$name = substr($name, 5); |
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} |
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return $name; |
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} |
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} |
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