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<?php
/**
* Case-insensitive dictionary, suitable for HTTP headers
*
* @package Requests
*/
namespace WpOrg\Requests\Response;
use WpOrg\Requests\Exception;
use WpOrg\Requests\Exception\InvalidArgument;
use WpOrg\Requests\Utility\CaseInsensitiveDictionary;
use WpOrg\Requests\Utility\FilteredIterator;
/**
* Case-insensitive dictionary, suitable for HTTP headers
*
* @package Requests
*/
class Headers extends CaseInsensitiveDictionary {
/**
* Get the given header
*
* Unlike {@see \WpOrg\Requests\Response\Headers::getValues()}, this returns a string. If there are
* multiple values, it concatenates them with a comma as per RFC2616.
*
* Avoid using this where commas may be used unquoted in values, such as
* Set-Cookie headers.
*
* @param string $offset Name of the header to retrieve.
* @return string|null Header value
*/
public function offsetGet($offset) {
if (is_string($offset)) {
$offset = strtolower($offset);
}
if (!isset($this->data[$offset])) {
return null;
}
return $this->flatten($this->data[$offset]);
}
/**
* Set the given item
*
* @param string $offset Item name
* @param string $value Item value
*
* @throws \WpOrg\Requests\Exception On attempting to use dictionary as list (`invalidset`)
*/
public function offsetSet($offset, $value) {
if ($offset === null) {
throw new Exception('Object is a dictionary, not a list', 'invalidset');
}
if (is_string($offset)) {
$offset = strtolower($offset);
}
if (!isset($this->data[$offset])) {
$this->data[$offset] = [];
}
$this->data[$offset][] = $value;
}
/**
* Get all values for a given header
*
* @param string $offset Name of the header to retrieve.
* @return array|null Header values
*
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not valid as an array key.
*/
public function getValues($offset) {
if (!is_string($offset) && !is_int($offset)) {
throw InvalidArgument::create(1, '$offset', 'string|int', gettype($offset));
}
if (is_string($offset)) {
$offset = strtolower($offset);
}
if (!isset($this->data[$offset])) {
return null;
}
return $this->data[$offset];
}
/**
* Flattens a value into a string
*
* Converts an array into a string by imploding values with a comma, as per
* RFC2616's rules for folding headers.
*
* @param string|array $value Value to flatten
* @return string Flattened value
*
* @throws \WpOrg\Requests\Exception\InvalidArgument When the passed argument is not a string or an array.
*/
public function flatten($value) {
if (is_string($value)) {
return $value;
}
if (is_array($value)) {
return implode(',', $value);
}
throw InvalidArgument::create(1, '$value', 'string|array', gettype($value));
}
/**
* Get an iterator for the data
*
* Converts the internally stored values to a comma-separated string if there is more
* than one value for a key.
*
* @return \ArrayIterator
*/
public function getIterator() {
return new FilteredIterator($this->data, [$this, 'flatten']);
}
}
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