public function ensureSentHeaders()
{
if ($this->headers_sent) {
return true;
}
if (isset($this->headers['STATUS'])) {
$h = (isset($this->attrs->noHttpVer) && $this->attrs->noHttpVer ? 'Status: ' : $this->attrs->server['SERVER_PROTOCOL']) . ' ' . $this->headers['STATUS'] . "\r\n";
} else {
$h = '';
}
$http11 = $this->attrs->server['SERVER_PROTOCOL'] === 'HTTP/1.1';
if ($this->contentLength === null && $this->upstream->checkChunkedEncCap() && $http11) {
$this->attrs->chunked = true;
}
if ($this->attrs->chunked) {
$this->header('Transfer-Encoding: chunked');
}
if ($http11) {
$connection = isset($this->attrs->server['HTTP_CONNECTION']) ? strtolower($this->attrs->server['HTTP_CONNECTION']) : 'keep-alive';
if ($connection === 'keep-alive' && $this->upstream->getKeepaliveTimeout() > 0) {
$this->header('Connection: keep-alive');
$this->keepalive = true;
} else {
$this->header('Connection: close');
}
} else {
$this->header('Connection: close');
}
foreach ($this->headers as $k => $line) {
if ($k !== 'STATUS') {
$h .= $line . "\r\n";
}
}
$h .= "\r\n";
$this->headers_sent_file = __FILE__;
$this->headers_sent_line = __LINE__;
$this->headers_sent = true;
$this->upstream->requestOut($this, $h);
return false;
}