/**
* HTTP HEAD
*
* This method is normally used to take a peak at a url, and only get the HTTP response headers, without the body
* This is used by clients to determine if a remote file was changed, so they can use a local cached version, instead of downloading it again
*
* @param string $uri
* @return void
*/
protected function httpHead($uri)
{
$node = $this->tree->getNodeForPath($uri);
/* This information is only collection for File objects.
* Ideally we want to throw 405 Method Not Allowed for every
* non-file, but MS Office does not like this
*/
if ($node instanceof IFile) {
$headers = $this->getHTTPHeaders($this->getRequestUri());
if (!isset($headers['Content-Type'])) {
$headers['Content-Type'] = 'application/octet-stream';
}
$this->httpResponse->setHeaders($headers);
}
$this->httpResponse->sendStatus(200);
}
/**
* Starts the DAV Server
*
* @return void
*/
function exec() {
try {
// If nginx (pre-1.2) is used as a proxy server, and SabreDAV as an
// origin, we must make sure we send back HTTP/1.0 if this was
// requested.
// This is mainly because nginx doesn't support Chunked Transfer
// Encoding, and this forces the webserver SabreDAV is running on,
// to buffer entire responses to calculate Content-Length.
$this->httpResponse->setHTTPVersion($this->httpRequest->getHTTPVersion());
// Setting the base url
$this->httpRequest->setBaseUrl($this->getBaseUri());
$this->invokeMethod($this->httpRequest, $this->httpResponse);
} catch (\Exception $e) {
try {
$this->emit('exception', [$e]);
} catch (\Exception $ignore) {
}
$DOM = new \DOMDocument('1.0', 'utf-8');
$DOM->formatOutput = true;
$error = $DOM->createElementNS('DAV:', 'd:error');
$error->setAttribute('xmlns:s', self::NS_SABREDAV);
$DOM->appendChild($error);
$h = function($v) {
return htmlspecialchars($v, ENT_NOQUOTES, 'UTF-8');
};
if (self::$exposeVersion) {
$error->appendChild($DOM->createElement('s:sabredav-version', $h(Version::VERSION)));
}
$error->appendChild($DOM->createElement('s:exception', $h(get_class($e))));
$error->appendChild($DOM->createElement('s:message', $h($e->getMessage())));
if ($this->debugExceptions) {
$error->appendChild($DOM->createElement('s:file', $h($e->getFile())));
$error->appendChild($DOM->createElement('s:line', $h($e->getLine())));
$error->appendChild($DOM->createElement('s:code', $h($e->getCode())));
$error->appendChild($DOM->createElement('s:stacktrace', $h($e->getTraceAsString())));
}
if ($this->debugExceptions) {
$previous = $e;
while ($previous = $previous->getPrevious()) {
$xPrevious = $DOM->createElement('s:previous-exception');
$xPrevious->appendChild($DOM->createElement('s:exception', $h(get_class($previous))));
$xPrevious->appendChild($DOM->createElement('s:message', $h($previous->getMessage())));
$xPrevious->appendChild($DOM->createElement('s:file', $h($previous->getFile())));
$xPrevious->appendChild($DOM->createElement('s:line', $h($previous->getLine())));
$xPrevious->appendChild($DOM->createElement('s:code', $h($previous->getCode())));
$xPrevious->appendChild($DOM->createElement('s:stacktrace', $h($previous->getTraceAsString())));
$error->appendChild($xPrevious);
}
}
if ($e instanceof Exception) {
$httpCode = $e->getHTTPCode();
$e->serialize($this, $error);
$headers = $e->getHTTPHeaders($this);
} else {
$httpCode = 500;
$headers = [];
}
$headers['Content-Type'] = 'application/xml; charset=utf-8';
$this->httpResponse->setStatus($httpCode);
$this->httpResponse->setHeaders($headers);
$this->httpResponse->setBody($DOM->saveXML());
$this->sapi->sendResponse($this->httpResponse);
}
}
