/**
* 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);
}
