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files >> /home/dataiclx/www/wp-content/plugins/nitropack/nitropack-sdk/NitroPack/SDK/StorageDriver/Redis.php
<?php // Disclaimer mtimes are only accurate for the final entries. But mtimes for parent directories (more than 1 level up the hierarchy) might not be updated correctly when children have been modified // This is also a bad design for emulating a file system performance wise. Only use this driver when you need shared storage between multiple servers. On a single server with an SSD using the Disk diver is a better idea. namespace NitroPack\SDK\StorageDriver; use \NitroPack\SDK\FileHandle; class Redis { const LOCK_TTL = 30000; const LOCK_TIMEOUT = 30; private $redis; private function preparePathInput($path) { return $path == DIRECTORY_SEPARATOR ? $path : rtrim($path, DIRECTORY_SEPARATOR); } public function __construct($host = "127.0.0.1", $port = 6379, $password = NULL, $db = NULL) { $this->redis = new \Redis(); $this->redis->connect($host, $port); if ($password !== NULL) { $this->redis->auth($password); } if ($db !== NULL) { $this->redis->select($db); } } public function getOsPath($parts) { return implode(DIRECTORY_SEPARATOR, $parts); } public function touch($path, $time = NULL) { if ($time === NULL || !is_numeric($time)) $time = time(); $path = $this->preparePathInput($path); $parent = dirname($path); $key = basename($path); if ($this->isDir($parent)) { $this->redis->hSet($parent, "::mtime::" . $key, (int)$time); $this->redis->hSetNx($parent, "::content::" . $key, ""); return true; } else { return false; } } public function setContent($path, $content) { $path = $this->preparePathInput($path); if ($this->isDir($path)) { return false; } else { try { //TODO: Create parent dir if it doesn't exist. This can impact performance though. Maybe make it optional $dir = dirname($path); $file = basename($path); $this->redis->hMSet($dir, array( "::content::" . $file => $content, "::mtime::" . $file => time() )); } catch (\Exception $e) { return false; } return true; } } public function createDir($dir) { $dir = $this->preparePathInput($dir); $now = time(); $childDir = NULL; $numDirsCreated = 0; try { while ($childDir !== "" && !$this->exists($dir)) { $this->redis->hSet($dir, "::self::ctime::", $now); $numDirsCreated++; if ($childDir) { $this->touch($this->getOsPath(array($dir, $childDir))); } $childDir = basename($dir); $dir = dirname($dir); } if ($numDirsCreated > 0 && $childDir) { $this->touch($this->getOsPath(array($dir, $childDir))); } } catch (\Exception $e) { return false; } return true; } public function deletePath($path) { $path = $this->preparePathInput($path); $dirKey = dirname($path); $fileName = basename($path); try { $deleted = $this->redis->hDel($dirKey, "::content::" . $fileName, "::mtime::" . $fileName); if ($deleted) { $this->touch($dirKey); } } catch (\Exception $e) { return false; } return true; } public function deleteFile($path) { return !$this->isDir($path) && $this->deletePath($path); } public function deleteDir($dir) { $dir = $this->preparePathInput($dir); try { if (!$this->isDir($dir)) return true; $this->trunkDir($dir) && $this->redis->unlink($dir) && $this->deletePath($dir); } catch (\Exception $e) { return false; } return true; } public function trunkDir($dir) { $dir = $this->preparePathInput($dir); if (!$this->isDir($dir)) return false; if ($dir == DIRECTORY_SEPARATOR) { $osPath = DIRECTORY_SEPARATOR . "*"; } else { $osPath = $this->getOsPath(array($dir, "*")); } $success = false; try { $this->redis->eval(' local cursor = "0"; repeat local t = redis.call("SCAN", cursor, "MATCH", ARGV[1]); cursor = t[1]; local list = t[2]; for i = 1, #list do redis.call("UNLINK", list[i]); end; until cursor == "0"; ', array($osPath), 0); $success = true; } catch (\Exception $e) { // TODO: Log an error } return $success; } public function isDirEmpty($dir) { $dir = $this->preparePathInput($dir); return (int)$this->redis->hLen($dir) <= 1; } private function isDir($dir) { $dir = $this->preparePathInput($dir); return !!$this->redis->hLen($dir); // if this is a non-empty sorted set then it is a dir } public function dirForeach($dir, $callback) { $dir = $this->preparePathInput($dir); if (!$this->isDir($dir)) return false; $result = true; $it = NULL; $prevScanMode = $this->redis->getOption(\Redis::OPT_SCAN); $this->redis->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY); try { while($entries = $this->redis->hScan($dir, $it, "::mtime::*")) { foreach($entries as $entry => $mtime) { $entry = substr($entry, 9);//remove the ::mtime:: prefix $path = $dir != DIRECTORY_SEPARATOR ? $this->getOsPath(array($dir, $entry)) : $dir . $entry; call_user_func($callback, $path); } } } catch (\Exception $e) { // TODO: Log an error $result = false; } finally { $this->redis->setOption(\Redis::OPT_SCAN, $prevScanMode); } return $result; } public function mtime($path) { $path = $this->preparePathInput($path); $dir = dirname($path); $file = basename($path); return $this->redis->hGet($dir, "::mtime::" . $file); } public function exists($path) { $path = $this->preparePathInput($path); $dir = dirname($path); $file = basename($path); return $this->redis->hExists($dir, "::mtime::" . $file); } public function getContent($path) { $path = $this->preparePathInput($path); if ($this->isDir($path)) { return false; } else { $dir = dirname($path); $file = basename($path); return $this->redis->hGet($dir, "::content::" . $file); } } public function rename($oldKey, $newKey, $innerCall = false) { $oldKey = $this->preparePathInput($oldKey); $newKey = $this->preparePathInput($newKey); if ($this->exists($newKey)) return false; $success = false; try { $isDir = $this->isDir($oldKey); if (!$isDir) { $content = $this->getContent($oldKey); $this->deleteFile($oldKey); $this->setContent($newKey, $content); } else { $this->deletePath($oldKey); $this->createDir($newKey); $this->redis->rename($oldKey, $newKey); $this->redis->eval(' local cursor = "0"; repeat local t = redis.call("SCAN", cursor, "MATCH", ARGV[1]); cursor = t[1]; local list = t[2]; for i = 1, #list do local s = list[i]; local changed = s:gsub(ARGV[2], ARGV[3], 1); redis.call("RENAME", s, changed); end; until cursor == "0"; ', array($this->getOsPath(array($oldKey, "*")), $this->prepareForLuaPattern($oldKey . DIRECTORY_SEPARATOR), $newKey . DIRECTORY_SEPARATOR), 0); } $success = true; } catch (\Exception $e) { // TODO: Log an error } return $success; } private function prepareForLuaPattern($pattern) { $specialPatternChars = array("%", "(", ")", ".", "+", "-", "*", "?", "[", "^", "$"); $regex = "/(" . implode("|", array_map("preg_quote", $specialPatternChars)) . ")/"; return preg_replace($regex, "%$1", $pattern); //return str_replace(array("%", "(", ")", ".", "+", "-", "*", "?", "[", "^", "$"), array("%%", "%(", "%)", "%.", "%+", "%-", "%*", "%?", "%[", "%^", "%$"), $pattern); } public function fopen($file, $mode) { $fh = new \stdClass(); $fh->pos = 0; $fh->content = ""; $fh->canRead = in_array($mode, array("r", "r+", "w+", "a+", "x+", "c+")); $fh->canWrite = in_array($mode, array("r+", "w", "w+", "a", "a+", "x", "x+", "c", "c+")); $fh->mode = $mode; $fh->writeOccurred = false; $fh->isOpen = true; $fh->path = $file; switch ($mode) { case "r": case "r+": if (!$this->exists($file)) return false; $fh->content = $this->getContent($file); break; case "w": case "w+": // Do nothing break; case "a": case "a+": if (!$this->exists($file)) return false; $fh->content = $this->getContent($file); break; case "x": case "x+": if ($this->exists($file)) return false; break; case "c": case "c+": if ($this->exists($file)) { $fh->content = $this->getContent($file); } break; } return new RedisFileHandle($fh); } public function fclose($handle) { if (!($handle instanceof FileHandle)) return false; $fh = $handle->getHandle(); if (!$fh->isOpen) return true; if ($fh->canWrite && $fh->writeOccurred) { $status = $this->fflush($handle); if ($status) { $fh->isOpen = false; $fh->canRead = false; $fh->canWrite = false; } return $status; } return true; } public function fflush($fh) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if ($fh->canWrite && $fh->writeOccurred && $fh->isOpen) { if ($this->setContent($fh->path, $fh->content)) { $fh->writeOccurred = false; // Reset the counter return true; } else { return false; } } return false; } public function fseek($fh, $offset, $whence = SEEK_SET) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); switch ($whence) { case SEEK_CUR: $fh->pos += $offset; break; case SEEK_END: $fh->pos = strlen($fh->content) + $offset; break; default: $fh->pos = $offset; break; } return 0; } public function ftell($fh) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); return $fh->pos; } public function fwrite($fh, $string, $length = NULL) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->canWrite) return false; if ($length === NULL || $length > strlen($string)) { $length = strlen($string); } if ($fh->mode[0] == "a" || $fh->pos > strlen($fh->content)) { $fh->content .= substr($string, 0, $length); $fh->pos = strlen($fh->content); } else { $head = substr($fh->content, 0, $fh->pos); $tail = substr($fh->content, $fh->pos + $length); $fh->content = $head . substr($string, 0, $length) . $tail; $fh->pos = strlen($head) + $length; } $fh->writeOccurred = true; return $length; } public function fread($fh, $length) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->canRead) return false; $result = substr($fh->content, $fh->pos, $length); $fh->pos += strlen($result);//$length; return $result; } public function fgetc($fh) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->canRead) return false; return $fh->content[$fh->pos++]; } public function fgets($fh, $length = NULL) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->canRead) return false; if ($length === NULL) { $length = strlen($fh->content); } $pos = strpos($fh->content, "\n", $fh->pos); if ($pos === false) { if ($fh->pos >= strlen($fh->content)) return false; $result = substr($fh->content, $fh->pos, $length); } else { $result = substr($fh->content, $fh->pos, $pos - $fh->pos+1); } $fh->pos += strlen($result); return $result; } public function flock($fh, $operation, $wouldblock = NULL) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->isOpen) return false; switch ($operation) { case LOCK_SH: // In this case we acquire a lock in order to wait for any other process that has currently locked the file // And then release the lock immediately. // The sole purpose of this is to block until the writer process is complete. return $this->acquireLock($fh->path, self::LOCK_TTL) && $this->releaseLock($fh->path); case LOCK_EX: return $this->acquireLock($fh->path, self::LOCK_TTL); case LOCK_UN: return $this->releaseLock($fh->path); default: return true; } return true; } public function feof($fh) { if (!($fh instanceof FileHandle)) return false; $fh = $fh->getHandle(); if (!$fh->isOpen) return false; return $fh->pos >= strlen($fh->content); } private function acquireLock($path, $ttl) { $startTime = microtime(true); while (false === ($result = $this->redis->set('lock:' . $path, time(), ['nx', 'px' => self::LOCK_TTL])) && microtime(true) - $startTime < self::LOCK_TIMEOUT) { usleep(50000); } return $result; } private function releaseLock($path) { return $this->redis->del('lock:' . $path); } }
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