/**
* Creates an array of cacheable and normalized message headers
*
* @param MessageInterface $message
*
* @return array
*/
private function persistHeaders(MessageInterface $message)
{
// Headers are excluded from the caching (see RFC 2616:13.5.1)
static $noCache = ['age' => true, 'connection' => true, 'keep-alive' => true, 'proxy-authenticate' => true, 'proxy-authorization' => true, 'te' => true, 'trailers' => true, 'transfer-encoding' => true, 'upgrade' => true, 'set-cookie' => true, 'set-cookie2' => true];
// Clone the response to not destroy any necessary headers when caching
$headers = array_diff_key($message->getHeaders(), $noCache);
// Cast the headers to a string
foreach ($headers as &$value) {
$value = implode(', ', $value);
}
return $headers;
}
private function headers(MessageInterface $message)
{
$result = '';
foreach ($message->getHeaders() as $name => $values) {
$result .= $name . ': ' . implode(', ', $values) . "\r\n";
}
return trim($result);
}
/**
* Gets the headers of a message as a string
*
* @param MessageInterface $message
*
* @return string
*/
public static function getHeadersAsString(MessageInterface $message)
{
$result = '';
foreach ($message->getHeaders() as $name => $values) {
$result .= "\r\n{$name}: " . implode(', ', $values);
}
return $result;
}
/**
* Creates an array of cacheable and normalized message headers.
*
* @param MessageInterface $message
*
* @return array
*/
private function persistHeaders(MessageInterface $message)
{
// Clone the response to not destroy any necessary headers when caching
$headers = array_diff_key($message->getHeaders(), self::$noCache);
// Cast the headers to a string
foreach ($headers as &$value) {
$value = implode(', ', $value);
}
return $headers;
}
