/**
* Send the response to the client.
* @param RequestInterface|null $req optional request object that triggered this response
* @return self
* @codeCoverageIgnore
*/
public function send(RequestInterface $req = null)
{
$seekBeg = 0;
$seekEnd = -1;
// modify response according to request
if ($req) {
// process cached response (not modified)
if ($req->hasHeader('If-Modified-Since') && $this->hasHeader('Last-Modified')) {
$cached = strtotime($req->getHeader('If-Modified-Since'));
$current = strtotime($this->getHeader('Last-Modified'));
if ($cached === $current) {
$this->setStatusCode(304);
}
}
// process cached response (ETag)
if ($req->hasHeader('If-None-Match') && $this->hasHeader('ETag')) {
if ($req->getHeader('If-None-Match') === $this->getHeader('ETag')) {
$this->setStatusCode(304);
}
}
// process chunks
if ($req->hasHeader('Range') && $this->hasHeader('Content-Length')) {
$size = (int) $this->getHeader('Content-Length');
$range = $req->getHeader('Range');
$this->setHeader('Accept-Ranges', 'bytes');
try {
if (!preg_match('@^bytes=\\d*-\\d*(,\\d*-\\d*)*$@', $range)) {
throw new \Exception('Invalid range');
}
$range = current(explode(',', substr($range, 6)));
list($seekBeg, $seekEnd) = explode('-', $range, 2);
$seekBeg = max((int) $seekBeg, 0);
$seekEnd = !(int) $seekEnd ? $size - 1 : min((int) $seekEnd, $size - 1);
if ($seekBeg > $seekEnd) {
throw new \Exception('Invalid range');
}
$this->setStatusCode(206);
$this->setHeader('Content-Range', 'bytes ' . $seekBeg . '-' . $seekEnd . '/' . $size);
$seekEnd = $seekEnd - $seekBeg;
} catch (\Exception $e) {
$this->setStatusCode(416);
$this->setHeader('Content-Range', 'bytes * /' . $size);
$this->body = null;
}
}
}
if (!headers_sent()) {
if ($this->getHeader('Location') && $this->code !== 201 && $this->code !== 202 && floor($this->code / 100) !== 3) {
$this->setStatusCode(302);
}
http_response_code($this->code);
foreach ($this->getHeaders() as $k => $v) {
header($k . ': ' . $v);
}
foreach ($this->cookies as $k => $v) {
header('Set-Cookie: ' . $k . '=' . urlencode($v[0]) . '; ' . $v[1], false);
}
}
if ($this->body && !in_array($this->getStatusCode(), [204, 304, 416]) && (!$req || $req->getMethod() !== 'HEAD')) {
$out = fopen('php://output', 'w');
stream_copy_to_stream($this->body, $out, $seekEnd, $seekBeg);
fclose($out);
}
return $this;
}
/**
* Builds canonical string from request.
*
* @param RequestInterface $request Request to get canonical string from.
*
* @return string
*/
public function getCanonicalString($request)
{
$parts = array($request->getHeader('content-type'), $request->getHeader('content-md5'), $request->getPath() . $request->getQuery(), $request->getHeader('date'));
return join(',', $parts);
}