Use PHP to implement an efficient and secure ftp server (2), PHP to implement ftp server_PHP tutorial

Use PHP to implement an efficient and secure ftp server (2), PHP implements ftp server

Continue from the previous article.

1. Implement user class CUser.

Users are stored in text form, and the user array is json-encoded. ​

Permission description of folders and files:

The implementation code is as follows:

　

class User{ const I = 1; // inherit const FD = 2; // folder delete const FN = 4; // folder rename const FC = 8; // folder create const FL = 16; // folder list const D = 32; // file delete const N = 64; // file rename const A = 128; // file append const W = 256; // file write (upload) const R = 512; // file read (download) private $hash_salt = ''; private $user_file; private $group_file; private $users = array(); private $groups = array(); private $file_hash = ''; public function __construct(){ $this->user_file = BASE_PATH.'/conf/users'; $this->group_file = BASE_PATH.'/conf/groups'; $this->reload(); } /** * 返回权限表达式 * @param int $access * @return string */ public static function AC($access){ $str = ''; $char = array('R','W','A','N','D','L','C','N','D','I'); for($i = 0; $i < 10; $i ){ if($access & pow(2,9-$i))$str.= $char[$i];else $str.= '-'; } return $str; } /** * 加载用户数据 */ public function reload(){ $user_file_hash = md5_file($this->user_file); $group_file_hash = md5_file($this->group_file); if($this->file_hash != md5($user_file_hash.$group_file_hash)){ if(($user = file_get_contents($this->user_file)) !== false){ $this->users = json_decode($user,true); if($this->users){ //folder排序 foreach ($this->users as $user=>$profile){ if(isset($profile['folder'])){ $this->users[$user]['folder'] = $this->sortFolder($profile['folder']); } } } }if(($group = file_get_contents($this->group_file)) !== false){ $this->groups = json_decode($group,true); if($this->groups){ //folder排序 foreach ($this->groups as $group=>$profile){ if(isset($profile['folder'])){ $this->groups[$group]['folder'] = $this->sortFolder($profile['folder']); } } } } $this->file_hash = md5($user_file_hash.$group_file_hash); } } /** * 对folder进行排序 * @return array */ private function sortFolder($folder){ uasort($folder, function($a,$b){ return strnatcmp($a['path'], $b['path']); }); $result = array(); foreach ($folder as $v){ $result[] = $v; } return $result; } /** * 保存用户数据 */ public function save(){ file_put_contents($this->user_file, json_encode($this->users),LOCK_EX); file_put_contents($this->group_file, json_encode($this->groups),LOCK_EX); } /** * 添加用户 * @param string $user * @param string $pass * @param string $home * @param string $expired * @param boolean $active * @param string $group * @param string $description * @param string $email * @return boolean */ public function addUser($user,$pass,$home,$expired,$active=true,$group='',$description='',$email = ''){ $user = strtolower($user); if(isset($this->users[$user]) || empty($user)){ return false; } $this->users[$user] = array( 'pass' => md5($user.$this->hash_salt.$pass), 'home' => $home, 'expired' => $expired, 'active' => $active, 'group' => $group, 'description' => $description, 'email' => $email, ); return true; } /** * 设置用户资料 * @param string $user * @param array $profile * @return boolean */ public function setUserProfile($user,$profile){ $user = strtolower($user); if(is_array($profile) && isset($this->users[$user])){ if(isset($profile['pass'])){ $profile['pass'] = md5($user.$this->hash_salt.$profile['pass']); }if(isset($profile['active'])){ if(!is_bool($profile['active'])){ $profile['active'] = $profile['active'] == 'true' ? true : false; } } $this->users[$user] = array_merge($this->users[$user],$profile); return true; } return false; } /** * 获取用户资料 * @param string $user * @return multitype:|boolean */ public function getUserProfile($user){ $user = strtolower($user); if(isset($this->users[$user])){ return $this->users[$user]; } return false; } /** * 删除用户 * @param string $user * @return boolean */ public function delUser($user){ $user = strtolower($user); if(isset($this->users[$user])){ unset($this->users[$user]); return true; } return false; } /** * 获取用户列表 * @return array */ public function getUserList(){ $list = array(); if($this->users){ foreach ($this->users as $user=>$profile){ $list[] = $user; } } sort($list); return $list; } /** * 添加组 * @param string $group * @param string $home * @return boolean */ public function addGroup($group,$home){ $group = strtolower($group); if(isset($this->groups[$group])){ return false; } $this->groups[$group] = array( 'home' => $home ); return true; } /** * 设置组资料 * @param string $group * @param array $profile * @return boolean */ public function setGroupProfile($group,$profile){ $group = strtolower($group); if(is_array($profile) && isset($this->groups[$group])){ $this->groups[$group] = array_merge($this->groups[$group],$profile); return true; } return false; } /** * 获取组资料 * @param string $group * @return multitype:|boolean */ public function getGroupProfile($group){ $group = strtolower($group); if(isset($this->groups[$group])){ return $this->groups[$group]; } return false; }/** * 删除组 * @param string $group * @return boolean */ public function delGroup($group){ $group = strtolower($group); if(isset($this->groups[$group])){ unset($this->groups[$group]); foreach ($this->users as $user => $profile){ if($profile['group'] == $group) $this->users[$user]['group'] = ''; } return true; } return false; } /** * 获取组列表 * @return array */ public function getGroupList(){ $list = array(); if($this->groups){ foreach ($this->groups as $group=>$profile){ $list[] = $group; } } sort($list); return $list; } /** * 获取组用户列表 * @param string $group * @return array */ public function getUserListOfGroup($group){ $list = array(); if(isset($this->groups[$group]) && $this->users){ foreach ($this->users as $user=>$profile){ if(isset($profile['group']) && $profile['group'] == $group){ $list[] = $user; } } } sort($list); return $list; } /** * 用户验证 * @param string $user * @param string $pass * @param string $ip * @return boolean */ public function checkUser($user,$pass,$ip = ''){ $this->reload(); $user = strtolower($user); if(isset($this->users[$user])){ if($this->users[$user]['active'] && time() <= strtotime($this->users[$user]['expired']) && $this->users[$user]['pass'] == md5($user.$this->hash_salt.$pass)){ if(empty($ip)){ return true; }else{ //ip验证 return $this->checkIP($user, $ip); } }else{ return false; } } return false; }/** * basic auth * @param string $base64 */ public function checkUserBasicAuth($base64){ $base64 = trim(str_replace('Basic ', '', $base64)); $str = base64_decode($base64); if($str !== false){ list($user,$pass) = explode(':', $str,2); $this->reload(); $user = strtolower($user); if(isset($this->users[$user])){ $group = $this->users[$user]['group']; if($group == 'admin' && $this->users[$user]['active'] && time() <= strtotime($this->users[$user]['expired']) && $this->users[$user]['pass'] == md5($user.$this->hash_salt.$pass)){ return true; }else{ return false; } } } return false; } /** * 用户登录ip验证 * @param string $user * @param string $ip * * 用户的ip权限继承组的IP权限。* Matching rules: * 1. Perform group allow list matching; * 2. As if passed, perform group rejection list matching; * 3. Perform user permission matching * 4. If passed, perform user rejection matching * */ public function checkIP($user,$ip){ $pass = false; //Perform group verification first $group = $this->users[$user]['group']; //Group allows matching if(isset($this->groups[$group]['ip']['allow' ])){ foreach ($this->groups[$group]['ip']['allow'] as $addr){ $pattern = '/'.str_replace('*','d ',str_replace('.', '.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty( $addr)){ $pass = true; break; } } } //If allowed, deny matching if($pass){ if(isset($this->groups[$group]['ip']['deny' ])){ foreach ($this->groups[$group]['ip']['deny'] as $addr){ $pattern = '/'.str_replace('*','d ',str_replace('.', '.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty( $addr)){ $pass = false; break; } } } } if(isset($this->users[$user]['ip']['allow' ])){ foreach ($this->users[$user]['ip']['allow'] as $addr){ $pattern = '/'.str_replace('*','d ',str_replace('.', '.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty( $addr)){ $pass = true; break; } } } if($pass){ if(isset($this->users[$user]['ip']['deny' ])){ foreach ($this->users[$user]['ip']['deny'] as $addr){ $pattern = '/'.str_replace('*','d ',str_replace('.', '.', $addr)).'/'; if(preg_match($pattern, $ip) && !empty( $addr)){ $pass = false; break; } } } } echo date('Y-m-d H:i:s')." [debug]tIP ACCESS: ".' '.($pass? 'true':'false')."n"; return $pass; } /** * Get the user's home directory * @param string $user * @return string */ public function getHomeDir($user){ $user = strtolower($user); $group = $this->users[$user]['group']; $dir = ''; if($group){ if(isset($this->groups[$group]['home']))$dir = $this->groups[$group]['home']; }$dir = !empty($this->users[$user]['home'])?$this->users[$user]['home']:$dir; return $dir; } //文件权限判断 public function isReadable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][0] == 'R'; }else{ return $result['access'][0] == 'R' && $result['access'][9] == 'I'; } } public function isWritable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][1] == 'W'; }else{ return $result['access'][1] == 'W' && $result['access'][9] == 'I'; } } public function isAppendable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][2] == 'A'; }else{ return $result['access'][2] == 'A' && $result['access'][9] == 'I'; } } public function isRenamable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][3] == 'N'; }else{ return $result['access'][3] == 'N' && $result['access'][9] == 'I'; } } public function isDeletable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][4] == 'D'; }else{ return $result['access'][4] == 'D' && $result['access'][9] == 'I'; } } //目录权限判断 public function isFolderListable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][5] == 'L'; }else{ return $result['access'][5] == 'L' && $result['access'][9] == 'I'; } } public function isFolderCreatable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][6] == 'C'; }else{ return $result['access'][6] == 'C' && $result['access'][9] == 'I'; } }public function isFolderRenamable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][7] == 'N'; }else{ return $result['access'][7] == 'N' && $result['access'][9] == 'I'; } } public function isFolderDeletable($user,$path){ $result = $this->getPathAccess($user, $path); if($result['isExactMatch']){ return $result['access'][8] == 'D'; }else{ return $result['access'][8] == 'D' && $result['access'][9] == 'I'; } } /** * 获取目录权限 * @param string $user * @param string $path * @return array * 进行最长路径匹配 * * 返回： * array( * 'access'=>目前权限 * ,'isExactMatch'=>是否精确匹配 * * ); * * 如果精确匹配，则忽略inherit. * 否则应判断是否继承父目录的权限， * 权限位表： * --- --- --- --- --- --- --- --- --- --- * | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | * --- --- --- --- --- --- --- --- --- --- * | R | W | A | N | D | L | C | N | D | I | * --- --- --- --- --- --- --- --- --- --- * | FILE | FOLDER | * ------------------- ------------------- */ public function getPathAccess($user,$path){ $this->reload(); $user = strtolower($user); $group = $this->users[$user]['group']; //去除文件名称 $path = str_replace(substr(strrchr($path, '/'),1),'',$path); $access = self::AC(0); $isExactMatch = false; if($group){ if(isset($this->groups[$group]['folder'])){ foreach ($this->groups[$group]['folder'] as $f){ //中文处理 $t_path = iconv('UTF-8','GB18030',$f['path']); if(strpos($path, $t_path) === 0){ $access = $f['access']; $isExactMatch = ($path == $t_path?true:false); } } } } if(isset($this->users[$user]['folder'])){ foreach ($this->users[$user]['folder'] as $f){ //中文处理 $t_path = iconv('UTF-8','GB18030',$f['path']); if(strpos($path, $t_path) === 0){ $access = $f['access']; $isExactMatch = ($path == $t_path?true:false); } } } echo date('Y-m-d H:i:s')." [debug]tACCESS:$access ".' '.($isExactMatch?'1':'0')." $pathn"; return array('access'=>$access,'isExactMatch'=>$isExactMatch); }/** * 添加在线用户 * @param ShareMemory $shm * @param swoole_server $serv * @param unknown $user * @param unknown $fd * @param unknown $ip * @return Ambigous > */ public function addOnline(ShareMemory $shm ,$serv,$user,$fd,$ip){ $shm_data = $shm->read(); if($shm_data !== false){ $shm_data['online'][$user.'-'.$fd] = array('ip'=>$ip,'time'=>time()); $shm_data['last_login'][] = array('user' => $user,'ip'=>$ip,'time'=>time()); //清除旧数据 if(count($shm_data['last_login'])>30)array_shift($shm_data['last_login']); $list = array(); foreach ($shm_data['online'] as $k =>$v){ $arr = explode('-', $k); if($serv->connection_info($arr[1]) !== false){ $list[$k] = $v; } } $shm_data['online'] = $list; $shm->write($shm_data); } return $shm_data; } /** * 添加登陆失败记录 * @param ShareMemory $shm * @param unknown $user * @param unknown $ip * @return Ambigous */ public function addAttempt(ShareMemory $shm ,$user,$ip){ $shm_data = $shm->read(); if($shm_data !== false){ if(isset($shm_data['login_attempt'][$ip.'||'.$user]['count'])){ $shm_data['login_attempt'][$ip.'||'.$user]['count'] = 1; }else{ $shm_data['login_attempt'][$ip.'||'.$user]['count'] = 1; } $shm_data['login_attempt'][$ip.'||'.$user]['time'] = time(); //清除旧数据 if(count($shm_data['login_attempt'])>30)array_shift($shm_data['login_attempt']); $shm->write($shm_data); } return $shm_data; } /** * 密码错误上限 * @param unknown $shm * @param unknown $user * @param unknown $ip * @return boolean */ public function isAttemptLimit(ShareMemory $shm,$user,$ip){ $shm_data = $shm->read(); if($shm_data !== false){ if(isset($shm_data['login_attempt'][$ip.'||'.$user]['count'])){ if($shm_data['login_attempt'][$ip.'||'.$user]['count'] > 10 && time() - $shm_data['login_attempt'][$ip.'||'.$user]['time'] < 600){ return true; } } } return false; }/** * Generate random keys * @param int $len * @return Ambigous */ public static function genPassword($len){ $str = null; $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz@!#$%* -"; $max = strlen($strPol)-1; for($i=0;$i<$len;$i ){ $str.=$strPol[rand(0,$max)];//rand($min,$max) generates a random integer between min and max } return $str; } } View Code

2. Shared memory operation class

This is relatively simple, just use the shmop extension of php.

　

class ShareMemory{ private $mode = 0644; private $shm_key; private $shm_size; /** * 构造函数 */ public function __construct(){ $key = 'F'; $size = 1024*1024; $this->shm_key = ftok(__FILE__,$key); $this->shm_size = $size 1; } /** * 读取内存数组 * @return array|boolean */ public function read(){ if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $str = shmop_read($shm_id,1,$this->shm_size-1); shmop_close($shm_id); if(($i = strpos($str,"")) !== false)$str = substr($str,0,$i); if($str){ return json_decode($str,true); }else{ return array(); } } return false; } /** * 写入数组到内存 * @param array $arr * @return int|boolean */ public function write($arr){ if(!is_array($arr))return false; $str = json_encode($arr).""; if(strlen($str) > $this->shm_size) return false; if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $count = shmop_write($shm_id,$str,1); shmop_close($shm_id); return $count; } return false; } /** * 删除内存块，下次使用时将重新开辟内存块 * @return boolean */ public function delete(){ if(($shm_id = shmop_open($this->shm_key,'c',$this->mode,$this->shm_size)) !== false){ $result = shmop_delete($shm_id); shmop_close($shm_id); return $result; } return false; } } View Code

 

3.内置的web服务器类

　　这个主要是嵌入在ftp的http服务器类，功能不是很完善，进行ftp的管理还是可行的。不过需要注意的是，这个实现与apache等其他http服务器运行的方式可能有所不同。代码是驻留内存的。

　　

class CWebServer{ protected $buffer_header = array(); protected $buffer_maxlen = 65535; //Maximum POST size const DATE_FORMAT_HTTP = 'D, d-M-Y H:i:s T'; const HTTP_EOF = "rnrn"; const HTTP_HEAD_MAXLEN = 8192; //The maximum length of the http header shall not exceed 2k const HTTP_POST_MAXLEN = 1048576;//1m const ST_FINISH = 1; //Complete, enter the processing flow const ST_WAIT = 2; //Waiting for data const ST_ERROR = 3; //Error, discard this packet private $requsts = array(); private $config = array(); public function log($msg,$level = 'debug') { echo date('Y-m-d H:i:s').' ['.$level."]t" .$ msg."n"; } public function __construct($config = array()){ $this->config = array( 'wwwroot' => __DIR__.'/wwwroot/', 'index' => 'index.php', 'path_deny' => array('/protected/'), ); } public function onReceive($serv,$fd,$data){ $ret = $this->checkData($fd, $data); switch ($ret){ case self::ST_ERROR: $serv->close($fd); $this->cleanBuffer($fd); $this->log('Recevie error.'); break; case self::ST_WAIT: $this->log('Recevie wait.'); return; default: break; } //Start complete request $request = $this->requsts[$fd]; $info = $serv->connection_info($fd); $request = $this->parseRequest($request); $request['remote_ip'] = $info['remote_ip']; $response = $this->onRequest($request); $output = $this->parseResponse($request,$response); $serv->send($fd,$output); if(isset($request['head']['Connection']) && strtolower( $request['head']['Connection']) == 'close'){ $serv->close($fd); } unset($this->requsts[$fd]); $_REQUEST = $_SESSION = $_COOKIE = $_FILES = $_POST = $_SERVER = $_GET = array(); }/** * 处理请求 * @param array $request * @return array $response * * $request=array( * 'time'=> * 'head'=>array( * 'method'=> * 'path'=> * 'protocol'=> * 'uri'=> * //other http header * '..'=>value * ) * 'body'=> * 'get'=>(if appropriate) * 'post'=>(if appropriate) * 'cookie'=>(if appropriate) * * * ) */ public function onRequest($request){ if($request['head']['path'][strlen($request['head']['path']) - 1] == '/'){ $request['head']['path'] .= $this->config['index']; } $response = $this->process($request); return $response; } /** * 清除数据 * @param unknown $fd */ public function cleanBuffer($fd){ unset($this->requsts[$fd]); unset($this->buffer_header[$fd]); } /** * 检查数据 * @param unknown $fd * @param unknown $data * @return string */ public function checkData($fd,$data){ if(isset($this->buffer_header[$fd])){ $data = $this->buffer_header[$fd].$data; } $request = $this->checkHeader($fd, $data); //请求头错误 if($request === false){ $this->buffer_header[$fd] = $data; if(strlen($data) > self::HTTP_HEAD_MAXLEN){ return self::ST_ERROR; }else{ return self::ST_WAIT; } } //post请求检查 if($request['head']['method'] == 'POST'){ return $this->checkPost($request); }else{ return self::ST_FINISH; } } /** * 检查请求头 * @param unknown $fd * @param unknown $data * @return boolean|array */ public function checkHeader($fd, $data){ //新的请求 if(!isset($this->requsts[$fd])){ //http头结束符 $ret = strpos($data,self::HTTP_EOF); if($ret === false){ return false; }else{ $this->buffer_header[$fd] = ''; $request = array(); list($header,$request['body']) = explode(self::HTTP_EOF, $data,2); $request['head'] = $this->parseHeader($header); $this->requsts[$fd] = $request; if($request['head'] == false){ return false; } } }else{ //post 数据合并 $request = $this->requsts[$fd]; $request['body'] .= $data; } return $request; } /** * 解析请求头 * @param string $header * @return array * array( * 'method'=>, * 'uri'=> * 'protocol'=> * 'name'=>value,... * * * * } */ public function parseHeader($header){ $request = array(); $headlines = explode("rn", $header); list($request['method'],$request['uri'],$request['protocol']) = explode(' ', $headlines[0],3); foreach ($headlines as $k=>$line){ $line = trim($line); if($k && !empty($line) && strpos($line,':') !== false){ list($name,$value) = explode(':', $line,2); $request[trim($name)] = trim($value); } } return $request; } /** * 检查post数据是否完整 * @param unknown $request * @return string */ public function checkPost($request){ if(isset($request['head']['Content-Length'])){ if(intval($request['head']['Content-Length']) > self::HTTP_POST_MAXLEN){ return self::ST_ERROR; } if(intval($request['head']['Content-Length']) > strlen($request['body'])){ return self::ST_WAIT; }else{ return self::ST_FINISH; } } return self::ST_ERROR; } /** * 解析请求 * @param unknown $request * @return Ambigous */ public function parseRequest($request){ $request['time'] = time(); $url_info = parse_url($request['head']['uri']); $request['head']['path'] = $url_info['path']; if(isset($url_info['fragment']))$request['head']['fragment'] = $url_info['fragment']; if(isset($url_info['query'])){ parse_str($url_info['query'],$request['get']); } //parse post body if($request['head']['method'] == 'POST'){ //目前只处理表单提交 if (isset($request['head']['Content-Type']) && substr($request['head']['Content-Type'], 0, 33) == 'application/x-www-form-urlencoded' || isset($request['head']['X-Request-With']) && $request['head']['X-Request-With'] == 'XMLHttpRequest'){ parse_str($request['body'],$request['post']); } }//parse cookies if(!empty($request['head']['Cookie'])){ $params = array(); $blocks = explode(";", $request['head']['Cookie']); foreach ($blocks as $b){ $_r = explode("=", $b, 2); if(count($_r)==2){ list ($key, $value) = $_r; $params[trim($key)] = trim($value, "rn t""); }else{ $params[$_r[0]] = ''; } } $request['cookie'] = $params; } return $request; } public function parseResponse($request,$response){ if(!isset($response['head']['Date'])){ $response['head']['Date'] = gmdate("D, d M Y H:i:s T"); } if(!isset($response['head']['Content-Type'])){ $response['head']['Content-Type'] = 'text/html;charset=utf-8'; } if(!isset($response['head']['Content-Length'])){ $response['head']['Content-Length'] = strlen($response['body']); } if(!isset($response['head']['Connection'])){ if(isset($request['head']['Connection']) && strtolower($request['head']['Connection']) == 'keep-alive'){ $response['head']['Connection'] = 'keep-alive'; }else{ $response['head']['Connection'] = 'close'; } } $response['head']['Server'] = CFtpServer::$software.'/'.CFtpServer::VERSION; $out = ''; if(isset($response['head']['Status'])){ $out .= 'HTTP/1.1 '.$response['head']['Status']."rn"; unset($response['head']['Status']); }else{ $out .= "HTTP/1.1 200 OKrn"; } //headers foreach($response['head'] as $k=>$v){ $out .= $k.': '.$v."rn"; } //cookies if($_COOKIE){ $arr = array(); foreach ($_COOKIE as $k => $v){ $arr[] = $k.'='.$v; } $out .= 'Set-Cookie: '.implode(';', $arr)."rn"; } //End $out .= "rn"; $out .= $response['body']; return $out