/**
* Gets a HTTP header value
* @param string $name Name of the header
* @return string|array|null The value of the header, an array of values if
* the header is set multiple times, null if not set
* @see zibo\library\http\Header
*/
public function getHeader($name)
{
if (!$this->headers) {
$this->headers = new HeaderContainer();
$this->headers->setHeadersFromServerRequest();
}
if (!$this->headers->hasHeader($name)) {
return null;
}
$header = $this->headers->getHeader($name);
if (!is_array($header)) {
return $header->getValue();
}
$values = array();
foreach ($header as $h) {
$values[] = $h->getValue();
}
return $values;
}
/**
* Gets the ETag
* @return null|string A unique identifier of the current version of
* the content if set, null otherwise
*/
public function getETag()
{
$header = $this->headers->getHeader(Header::HEADER_ETAG);
if (!$header) {
return null;
}
return $header->getValue();
}
