/**
* Attempts to cache the sent entity by its last modification date.
* @param string|int|DateTime last modified time
* @param string strong entity tag validator
* @return bool
*/
public function isModified($lastModified = NULL, $etag = NULL)
{
if ($lastModified) {
$this->response->setHeader('Last-Modified', $this->response->date($lastModified));
}
if ($etag) {
$this->response->setHeader('ETag', '"' . addslashes($etag) . '"');
}
$ifNoneMatch = $this->request->getHeader('If-None-Match');
if ($ifNoneMatch === '*') {
$match = TRUE; // match, check if-modified-since
} elseif ($ifNoneMatch !== NULL) {
$etag = $this->response->getHeader('ETag');
if ($etag == NULL || strpos(' ' . strtr($ifNoneMatch, ",\t", ' '), ' ' . $etag) === FALSE) {
return TRUE;
} else {
$match = TRUE; // match, check if-modified-since
}
}
$ifModifiedSince = $this->request->getHeader('If-Modified-Since');
if ($ifModifiedSince !== NULL) {
$lastModified = $this->response->getHeader('Last-Modified');
if ($lastModified != NULL && strtotime($lastModified) <= strtotime($ifModifiedSince)) {
$match = TRUE;
} else {
return TRUE;
}
}
if (empty($match)) {
return TRUE;
}
$this->response->setCode(IHttpResponse::S304_NOT_MODIFIED);
return FALSE;
}
/**
* Sends response to output.
* @return void
*/
public function send(IHttpRequest $httpRequest, IHttpResponse $httpResponse)
{
$httpResponse->setContentType($this->contentType);
$httpResponse->setHeader('Content-Disposition', 'attachment; filename="' . $this->name . '"');
$filesize = $length = filesize($this->file);
$handle = fopen($this->file, 'r');
if ($this->resuming) {
$httpResponse->setHeader('Accept-Ranges', 'bytes');
if (preg_match('#^bytes=(\\d*)-(\\d*)$#', $httpRequest->getHeader('Range'), $matches)) {
list(, $start, $end) = $matches;
if ($start === '') {
$start = max(0, $filesize - $end);
$end = $filesize - 1;
} elseif ($end === '' || $end > $filesize - 1) {
$end = $filesize - 1;
}
if ($end < $start) {
$httpResponse->setCode(416);
// requested range not satisfiable
return;
}
$httpResponse->setCode(206);
$httpResponse->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $filesize);
$length = $end - $start + 1;
fseek($handle, $start);
} else {
$httpResponse->setHeader('Content-Range', 'bytes 0-' . ($filesize - 1) . '/' . $filesize);
}
}
$httpResponse->setHeader('Content-Length', $length);
while (!feof($handle) && $length > 0) {
echo $s = fread($handle, min(4000000.0, $length));
$length -= strlen($s);
}
fclose($handle);
}
/**
* Sends response to output.
* @return void
*/
public function send(IHttpRequest $httpRequest, IHttpResponse $httpResponse)
{
$httpResponse->setContentType($this->contentType);
$httpResponse->setHeader('Content-Disposition', 'attachment; filename="' . $this->name . '"');
$filesize = $length = filesize($this->file);
$handle = fopen($this->file, 'r');
if ($this->resuming) {
$httpResponse->setHeader('Accept-Ranges', 'bytes');
$range = $httpRequest->getHeader('Range');
if ($range !== NULL) {
$range = substr($range, 6); // 6 == strlen('bytes=')
list($start, $end) = explode('-', $range);
if ($start == NULL) {
$start = 0;
}
if ($end == NULL) {
$end = $filesize - 1;
}
if ($start < 0 || $end <= $start || $end > $filesize -1) {
$httpResponse->setCode(416); // requested range not satisfiable
return;
}
$httpResponse->setCode(206);
$httpResponse->setHeader('Content-Range', 'bytes ' . $start . '-' . $end . '/' . $filesize);
$length = $end - $start + 1;
fseek($handle, $start);
} else {
$httpResponse->setHeader('Content-Range', 'bytes 0-' . ($filesize - 1) . '/' . $filesize);
}
}
$httpResponse->setHeader('Content-Length', $length);
while (!feof($handle)) {
echo fread($handle, 4e6);
}
fclose($handle);
}
/**
* Dispatch a HTTP request to a front controller.
* @return void
*/
public function run()
{
$request = NULL;
$repeatedError = FALSE;
do {
try {
if (count($this->requests) > self::$maxLoop) {
throw new NApplicationException('Too many loops detected in application life cycle.');
}
if (!$request) {
$this->onStartup($this);
$request = $this->router->match($this->httpRequest);
if (!$request instanceof NPresenterRequest) {
$request = NULL;
throw new NBadRequestException('No route for HTTP request.');
}
if (strcasecmp($request->getPresenterName(), $this->errorPresenter) === 0) {
throw new NBadRequestException('Invalid request. Presenter is not achievable.');
}
}
$this->requests[] = $request;
$this->onRequest($this, $request);
// Instantiate presenter
$presenterName = $request->getPresenterName();
try {
$this->presenter = $this->presenterFactory->createPresenter($presenterName);
} catch (NInvalidPresenterException $e) {
throw new NBadRequestException($e->getMessage(), 404, $e);
}
$this->presenterFactory->getPresenterClass($presenterName);
$request->setPresenterName($presenterName);
$request->freeze();
// Execute presenter
$response = $this->presenter->run($request);
if ($response) {
$this->onResponse($this, $response);
}
// Send response
if ($response instanceof NForwardResponse) {
$request = $response->getRequest();
continue;
} elseif ($response instanceof IPresenterResponse) {
$response->send($this->httpRequest, $this->httpResponse);
}
break;
} catch (Exception $e) {
// fault barrier
$this->onError($this, $e);
if (!$this->catchExceptions) {
$this->onShutdown($this, $e);
throw $e;
}
if ($repeatedError) {
$e = new NApplicationException('An error occurred while executing error-presenter', 0, $e);
}
if (!$this->httpResponse->isSent()) {
$this->httpResponse->setCode($e instanceof NBadRequestException ? $e->getCode() : 500);
}
if (!$repeatedError && $this->errorPresenter) {
$repeatedError = TRUE;
if ($this->presenter instanceof NPresenter) {
try {
$this->presenter->forward(":$this->errorPresenter:", array('exception' => $e));
} catch (NAbortException $foo) {
$request = $this->presenter->getLastCreatedRequest();
}
} else {
$request = new NPresenterRequest(
$this->errorPresenter,
NPresenterRequest::FORWARD,
array('exception' => $e)
);
}
// continue
} else { // default error handler
if ($e instanceof NBadRequestException) {
$code = $e->getCode();
} else {
$code = 500;
NDebugger::log($e, NDebugger::ERROR);
}
require dirname(__FILE__) . '/templates/error.phtml';
break;
}
}
} while (1);
$this->onShutdown($this, isset($e) ? $e : NULL);
}
