/**
* 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;
}
/**
* Gets the start line of a message
*
* @param MessageInterface $message
*
* @return string
* @throws \InvalidArgumentException
*/
public static function getStartLine(MessageInterface $message)
{
if ($message instanceof RequestInterface) {
return trim($message->getMethod() . ' ' . $message->getResource()) . ' HTTP/' . $message->getProtocolVersion();
} elseif ($message instanceof ResponseInterface) {
return 'HTTP/' . $message->getProtocolVersion() . ' ' . $message->getStatusCode() . ' ' . $message->getReasonPhrase();
} else {
throw new \InvalidArgumentException('Unknown message type');
}
}
/**
* Converts an array of header values that may contain comma separated
* headers into an array of headers with no comma separated values.
*
* @param MessageInterface $message That contains the header
* @param string $header Header to retrieve from the message
*
* @return array Returns the normalized header field values.
*/
public static function normalizeHeader(MessageInterface $message, $header)
{
$h = $message->getHeader($header, true);
for ($i = 0, $total = count($h); $i < $total; $i++) {
if (strpos($h[$i], ',') === false) {
continue;
}
foreach (preg_split('/,(?=([^"]*"[^"]*")*[^"]*$)/', $h[$i]) as $v) {
$h[] = trim($v);
}
unset($h[$i]);
}
return $h;
}
private function headers(MessageInterface $message)
{
$result = '';
foreach ($message->getHeaders() as $name => $values) {
$result .= $name . ': ' . implode(', ', $values) . "\r\n";
}
return trim($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;
}