public static function loadCached($url, $expires, $debug = false)
{
if (!function_exists('curl_version')) {
ErrorHelper::logWarning('Could not fetch data, cURL unavailable');
return null;
}
if ($debug) {
ErrorHelper::logDebug('cURL for: ' . $url);
}
$filename = LoadHelper::getFilename($url);
if (!LoadHelper::hasCache($url, $expires)) {
if ($debug) {
ErrorHelper::logDebug('No cache or expired, making new request');
}
$rawData = LoadHelper::load($url);
if (!$rawData) {
if ($debug) {
ErrorHelper::logDebug('cURL request failed: ' . LoadHelper::$error);
}
if (LoadHelper::hasCache($url, -1)) {
if ($debug) {
ErrorHelper::logDebug('Using expired cache');
}
$cache = file_get_contents($filename);
return $cache;
} else {
if ($debug) {
ErrorHelper::logDebug('Request failed, no cache');
}
return false;
}
}
if ($debug) {
ErrorHelper::logDebug('Data returned, saving it to cache');
}
$folder = LoadHelper::getCacheDir();
if (!file_exists($folder)) {
mkdir($folder);
}
$cache = @fopen($filename, 'wb');
$write = $cache ? fwrite($cache, $rawData) : null;
if (!$write) {
ErrorHelper::logWarning('Writing to cache failed. Make sure the folder ' . $folder . ' exists and is writeable (chmod 777)');
}
if ($cache) {
fclose($cache);
}
return $rawData;
}
if ($debug) {
ErrorHelper::logDebug('Cache hit, using that');
}
return file_get_contents($filename);
}
private static function install($debug = false)
{
if (!extension_loaded('zip')) {
ErrorHelper::logWarning('zip extensions unavailable on server, can\'t extract updates without it');
return;
}
LoadHelper::loadCached(UpdateHelper::$new->zipball_url, 1000, $debug);
$zip = new ZipArchive();
if ($zip->open(LoadHelper::getFilename(UpdateHelper::$new->zipball_url)) === TRUE) {
// make sure temp directory is empty
UpdateHelper::removeTemp();
$success = $zip->extractTo(LoadHelper::getCacheDir() . UpdateHelper::tmp_path);
$zip->close();
if ($debug) {
ErrorHelper::logDebug('Update archive ' . ($success ? 'extracted successfully' : 'failed to extract'));
}
} else {
if ($debug) {
ErrorHelper::logWarning('Failed extracting update archive');
}
return;
}
// updates from github are packed in a folder within the zip, we need the name of this folder
$rootFolder = '';
$iterator = UpdateHelper::getUpdateIterator(false);
foreach ($iterator as $item) {
// the first folder we hit when iterating will be the root folder, save that
if ($item->isDir() && $rootFolder == '') {
$rootFolder = $iterator->getSubPathName();
if ($debug) {
ErrorHelper::logDebug('Update root folder is ' . $rootFolder);
}
// we won't ever need to create the root folder, so we skip to the next item
continue;
}
// figure out destination path
$destination = realpath(UpdateHelper::destination . UpdateHelper::removePrefix($iterator->getSubPathName(), $rootFolder));
if ($item->isDir()) {
if (file_exists($destination)) {
continue;
}
if ($debug) {
ErrorHelper::logDebug('Create directory ' . $destination);
}
mkdir($destination);
} else {
$success = copy($item, $destination);
if ($debug) {
ErrorHelper::logDebug('Copy file from ' . $item . ' to ' . $destination . ($success ? ' OK' : ' Failed'));
}
}
}
// remove any temporary files extracted in the process
UpdateHelper::removeTemp();
// remove the update zip file, we won't need it anymore
unlink(LoadHelper::getFilename(UpdateHelper::$new->zipball_url));
return true;
}
