/**
* @return bool
*/
public static function isSecureConnectionAssumedByPiwikButNotForcedYet()
{
$isSecureConnectionLikelyNotUsed = Url::isSecureConnectionLikelyNotUsed();
$hasSessionCookieSecureFlag = ProxyHttp::isHttps();
$isSecureConnectionAssumedByPiwikButNotForcedYet = Url::isPiwikConfiguredToAssumeSecureConnection() && !SettingsPiwik::isHttpsForced();
return $isSecureConnectionLikelyNotUsed && $hasSessionCookieSecureFlag && $isSecureConnectionAssumedByPiwikButNotForcedYet;
}
/**
* Serve static files through php proxy.
*
* It performs the following actions:
* - Checks the file is readable or returns "HTTP/1.0 404 Not Found"
* - Returns "HTTP/1.1 304 Not Modified" after comparing the HTTP_IF_MODIFIED_SINCE
* with the modification date of the static file
* - Will try to compress the static file according to HTTP_ACCEPT_ENCODING. Compressed files are store in
* the /tmp directory. If compressing extensions are not available, a manually gzip compressed file
* can be provided in the /tmp directory. It has to bear the same name with an added .gz extension.
* Using manually compressed static files requires you to manually update the compressed file when
* the static file is updated.
* - Overrides server cache control config to allow caching
* - Sends Very Accept-Encoding to tell proxies to store different version of the static file according
* to users encoding capacities.
*
* Warning:
* Compressed filed are stored in the /tmp directory.
* If this method is used with two files bearing the same name but located in different locations,
* there is a risk of conflict. One file could be served with the content of the other.
* A future upgrade of this method would be to recreate the directory structure of the static file
* within a /tmp/compressed-static-files directory.
*
* @param string $file The location of the static file to serve
* @param string $contentType The content type of the static file.
* @param bool $expireFarFuture Day in the far future to set the Expires header to.
* Should be set to false for files that should not be cached.
*/
public static function serverStaticFile($file, $contentType, $expireFarFutureDays = 100)
{
if (file_exists($file)) {
// conditional GET
$modifiedSince = '';
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
$modifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
// strip any trailing data appended to header
if (false !== ($semicolon = strpos($modifiedSince, ';'))) {
$modifiedSince = substr($modifiedSince, 0, $semicolon);
}
}
$fileModifiedTime = @filemtime($file);
$lastModified = gmdate('D, d M Y H:i:s', $fileModifiedTime) . ' GMT';
// set HTTP response headers
self::overrideCacheControlHeaders('public');
@header('Vary: Accept-Encoding');
@header('Content-Disposition: inline; filename=' . basename($file));
if ($expireFarFutureDays) {
// Required by proxy caches potentially in between the browser and server to cache the request indeed
@header("Expires: " . gmdate('D, d M Y H:i:s', time() + 86400 * (int) $expireFarFutureDays) . ' GMT');
}
// Returns 304 if not modified since
if ($modifiedSince === $lastModified) {
self::setHttpStatus('304 Not Modified');
} else {
// optional compression
$compressed = false;
$encoding = '';
$compressedFileLocation = AssetManager::getInstance()->getAssetDirectory() . '/' . basename($file);
$phpOutputCompressionEnabled = ProxyHttp::isPhpOutputCompressed();
if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && !$phpOutputCompressionEnabled) {
$acceptEncoding = $_SERVER['HTTP_ACCEPT_ENCODING'];
if (extension_loaded('zlib') && function_exists('file_get_contents') && function_exists('file_put_contents')) {
if (preg_match('/(?:^|, ?)(deflate)(?:,|$)/', $acceptEncoding, $matches)) {
$encoding = 'deflate';
$filegz = $compressedFileLocation . '.deflate';
} else {
if (preg_match('/(?:^|, ?)((x-)?gzip)(?:,|$)/', $acceptEncoding, $matches)) {
$encoding = $matches[1];
$filegz = $compressedFileLocation . '.gz';
}
}
if (!empty($encoding)) {
// compress-on-demand and use cache
if (!file_exists($filegz) || $fileModifiedTime > @filemtime($filegz)) {
$data = file_get_contents($file);
if ($encoding == 'deflate') {
$data = gzdeflate($data, 9);
} else {
if ($encoding == 'gzip' || $encoding == 'x-gzip') {
$data = gzencode($data, 9);
}
}
file_put_contents($filegz, $data);
}
$compressed = true;
$file = $filegz;
}
} else {
// manually compressed
$filegz = $compressedFileLocation . '.gz';
if (preg_match('/(?:^|, ?)((x-)?gzip)(?:,|$)/', $acceptEncoding, $matches) && file_exists($filegz) && $fileModifiedTime < @filemtime($filegz)) {
$encoding = $matches[1];
$compressed = true;
$file = $filegz;
}
}
}
@header('Last-Modified: ' . $lastModified);
if (!$phpOutputCompressionEnabled) {
@header('Content-Length: ' . filesize($file));
}
if (!empty($contentType)) {
@header('Content-Type: ' . $contentType);
}
if ($compressed) {
@header('Content-Encoding: ' . $encoding);
}
if (!_readfile($file)) {
self::setHttpStatus('505 Internal server error');
}
}
} else {
self::setHttpStatus('404 Not Found');
}
}