/**
* Whether the client accepts compressed content.
*
* @return bool if client accepts compressed content.
*/
protected function clientAcceptsCompression()
{
if ($this->server->exists('HTTP_ACCEPT_ENCODING')) {
$accept = $this->server->asScalar('HTTP_ACCEPT_ENCODING')->uncage();
return strpos($accept, 'gzip') !== false;
}
return false;
}
/**
* Whether the client already has a current copy.
*
* @return bool whether the client copy is current
*/
protected function isCurrent()
{
// if either header is missing, treat as not current.
if (!$this->server->exists('HTTP_IF_MODIFIED_SINCE') || !$this->server->exists('HTTP_IF_NONE_MATCH')) {
return false;
}
// extract both headers
try {
$modified = $this->server->asScalar('HTTP_IF_MODIFIED_SINCE')->filter(new T_Validate_UnixDate())->uncage();
$etag = $this->server->asScalar('HTTP_IF_NONE_MATCH')->filter('mb_trim')->filter('mb_strtolower')->uncage();
} catch (T_Exception_Filter $e) {
// retrieval failed, deliver full content.
return false;
}
// compare headers with current data
if ($modified < $this->lm || strcmp($etag, $this->getEtag()) !== 0) {
return false;
// old content
}
return true;
}
/**
* Whether the field is submitted in a particular array cage.
*
* @param T_Cage_Array $source source array to check
* @return bool whether hidden value is submitted
*/
function isSubmitted(T_Cage_Array $source)
{
return $source->exists($this->getFieldname());
}
function testIsset()
{
$cage = new T_Cage_Array(array('b' => 1));
$this->assertTrue($cage->exists('b'));
$this->assertFalse($cage->exists('a'));
}
/**
* Whether the field is submitted in a particular array cage.
*
* @param T_Cage_Array $source source array to check
* @return bool whether a non-zero length value has been submitted
*/
function isSubmitted(T_Cage_Array $source)
{
$submitted = $source->exists($this->getFieldname());
if ($submitted) {
if ($this->as_scalar) {
$cage = $source->asScalar($this->getFieldname());
$submitted = strlen($cage->uncage()) > 0;
} else {
$cage = $source->asArray($this->getFieldname());
$submitted = count($cage->uncage()) > 0;
}
}
return $submitted;
}
/**
* Detects whether the request is HTTPS
*
* @param T_Cage_Array $server server superglobal data
* @return bool whether the request has been made over a secure connection
*/
protected function isSsl(T_Cage_Array $server)
{
// extract HTTPS status and port number from $_SERVER
$https = null;
if ($server->exists('HTTPS')) {
$https = $server->asScalar('HTTPS')->uncage();
}
$port = null;
if ($server->exists('SERVER_PORT')) {
$port = $server->asScalar('SERVER_PORT')->filter(new T_Validate_Int())->uncage();
}
// test data
return strcasecmp($https, 'on') === 0 || $https == 1 || $port == 443;
}
