使用PHP如何实现高效安全的ftp服务器(二)

在上篇文章给大家介绍了使用PHP如何实现高效安全的ftp服务器(一)，感兴趣的朋友可以点击了解详情。接下来通过本篇文章给大家介绍使用PHP如何实现高效安全的ftp服务器(二)，具体内容如下所示：

1.实现用户类CUser。

用户的存储采用文本形式，将用户数组进行json编码。

用户文件格式：

* array(
* 'user1' => array(
* 'pass'=>'',
* 'group'=>'',
* 'home'=>'/home/ftp/', //ftp主目录
* 'active'=>true,
* 'expired=>'2015-12-12',
* 'description'=>'',
* 'email' => '',
* 'folder'=>array(
* //可以列出主目录下的文件和目录，但不能创建和删除，也不能进入主目录下的目录
* //前1-5位是文件权限，6-9是文件夹权限,10是否继承(inherit)
* array('path'=>'/home/ftp/','access'=>'RWANDLCNDI'),
* //可以列出/home/ftp/a/下的文件和目录,可以创建和删除，可以进入/home/ftp/a/下的子目录，可以创建和删除。
* array('path'=>'/home/ftp/a/','access'=>'RWAND-----'),
* ),
* 'ip'=>array(
* 'allow'=>array(ip1,ip2,...),//支持*通配符: 192.168.0.*
* 'deny'=>array(ip1,ip2,...)
* )
* ) 
* )
* 
* 组文件格式：
* array(
* 'group1'=>array(
* 'home'=>'/home/ftp/dept1/',
* 'folder'=>array(
* 
* ),
* 'ip'=>array(
* 'allow'=>array(ip1,ip2,...),
* 'deny'=>array(ip1,ip2,...)
* )
* )
* )

文件夹和文件的权限说明：

* 文件权限
* R读 : 允许用户读取（即下载）文件。该权限不允许用户列出目录内容，执行该操作需要列表权限。
* W写: 允许用户写入（即上传）文件。该权限不允许用户修改现有的文件，执行该操作需要追加权限。
* A追加: 允许用户向现有文件中追加数据。该权限通常用于使用户能够对部分上传的文件进行续传。
* N重命名: 允许用户重命名现有的文件。
* D删除: 允许用户删除文件。
*
* 目录权限
* L列表: 允许用户列出目录中包含的文件。
* C创建: 允许用户在目录中新建子目录。
* N重命名: 允许用户在目录中重命名现有子目录。
* D删除: 允许用户在目录中删除现有子目录。注意： 如果目录包含文件，用户要删除目录还需要具有删除文件权限。
*
* 子目录权限
* I继承: 允许所有子目录继承其父目录具有的相同权限。继承权限适用于大多数情况，但是如果访问必须受限于子文件夹，例如实施强制访问控制（Mandatory Access Control）时，则取消继承并为文件夹逐一授予权限。
*

实现代码如下：

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 $ip
* 
* 用户的ip权限继承组的IP权限。
* 匹配规则：
* 1.进行组允许列表匹配；
* 2.如同通过，进行组拒绝列表匹配；
* 3.进行用户允许匹配
* 4.如果通过，进行用户拒绝匹配
* 
*/
public function checkIP($user,$ip){
$pass = false;
//先进行组验证 
$group = $this->users[$user]['group'];
//组允许匹配
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)){
$pass = true;
break;
}
}
}
//如果允许通过，进行拒绝匹配
if($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;
}
/**
* 获取用户主目录
* @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')." $path\n";
return array('access'=>$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 <multitype:, boolean, mixed, multitype:unknown number multitype:Ambigous <unknown, number> >
*/
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 <number, multitype:, boolean, mixed>
*/
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;
}
/**
* 生成随机密钥
* @param int $len
* @return Ambigous <NULL, string>
*/
public static function genPassword($len){
$str = null;
$strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz@!#$%*+-";
$max = strlen($strPol)-1;
for($i=0;$i<$len;$i++){
$str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数
}
return $str;
} 
}

2.共享内存操作类

这个相对简单，使用php的shmop扩展即可。

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,"\0")) !== 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)."\0";
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;
}
}

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; //最大POST尺寸
const DATE_FORMAT_HTTP = 'D, d-M-Y H:i:s T';
const HTTP_EOF = "\r\n\r\n";
const HTTP_HEAD_MAXLEN = 8192; //http头最大长度不得超过2k
const HTTP_POST_MAXLEN = 1048576;//1m
const ST_FINISH = 1; //完成，进入处理流程
const ST_WAIT = 2; //等待数据
const ST_ERROR = 3; //错误，丢弃此包
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;
}
//开始完整的请求
$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("\r\n", $header);
list($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 $request
* @return Ambigous <unknown, mixed, multitype:string >
*/
public function parseRequest($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, "\r\n \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']."\r\n";
unset($response['head']['Status']);
}else{
$out .= "HTTP/1.1 200 OK\r\n";
}
//headers
foreach($response['head'] as $k=>$v){
$out .= $k.': '.$v."\r\n";
}
//cookies
if($_COOKIE){ 
$arr = array();
foreach ($_COOKIE as $k => $v){
$arr[] = $k.'='.$v; 
}
$out .= 'Set-Cookie: '.implode(';', $arr)."\r\n";
}
//End
$out .= "\r\n";
$out .= $response['body'];
return $out;
}
/**
* 处理请求
* @param unknown $request
* @return array
*/
public function process($request){
$path = $request['head']['path'];
$isDeny = false;
foreach ($this->config['path_deny'] as $p){
if(strpos($path, $p) === 0){
$isDeny = true;
break;
}
}
if($isDeny){
return $this->httpError(403, '服务器拒绝访问:路径错误'); 
}
if(!in_array($request['head']['method'],array('GET','POST'))){
return $this->httpError(500, '服务器拒绝访问:错误的请求方法');
}
$file_ext = strtolower(trim(substr(strrchr($path, '.'), 1)));
$path = realpath(rtrim($this->config['wwwroot'],'/'). '/' . ltrim($path,'/'));
$this->log('WEB:['.$request['head']['method'].'] '.$request['head']['uri'] .' '.json_encode(isset($request['post'])?$request['post']:array()));
$response = array();
if($file_ext == 'php'){
if(is_file($path)){
//设置全局变量 
if(isset($request['get']))$_GET = $request['get'];
if(isset($request['post']))$_POST = $request['post'];
if(isset($request['cookie']))$_COOKIE = $request['cookie'];
$_REQUEST = array_merge($_GET,$_POST, $_COOKIE); 
foreach ($request['head'] as $key => $value){
$_key = 'HTTP_'.strtoupper(str_replace('-', '_', $key));
$_SERVER[$_key] = $value;
}
$_SERVER['REMOTE_ADDR'] = $request['remote_ip'];
$_SERVER['REQUEST_URI'] = $request['head']['uri']; 
//进行http auth
if(isset($_GET['c']) && strtolower($_GET['c']) != 'site'){
if(isset($request['head']['Authorization'])){
$user = new User();
if($user->checkUserBasicAuth($request['head']['Authorization'])){
$response['head']['Status'] = self::$HTTP_HEADERS[200];
goto process;
}
}
$response['head']['Status'] = self::$HTTP_HEADERS[401];
$response['head']['WWW-Authenticate'] = 'Basic realm="Real-Data-FTP"'; 
$_GET['c'] = 'Site';
$_GET['a'] = 'Unauthorized'; 
}
process: 
ob_start(); 
try{
include $path; 
$response['body'] = ob_get_contents();
$response['head']['Content-Type'] = APP::$content_type; 
}catch (Exception $e){
$response = $this->httpError(500, $e->getMessage());
}
ob_end_clean();
}else{
$response = $this->httpError(404, '页面不存在');
}
}else{
//处理静态文件
if(is_file($path)){
$response['head']['Content-Type'] = isset(self::$MIME_TYPES[$file_ext]) ? self::$MIME_TYPES[$file_ext]:"application/octet-stream";
//使用缓存
if(!isset($request['head']['If-Modified-Since'])){
$fstat = stat($path);
$expire = 2592000;//30 days
$response['head']['Status'] = self::$HTTP_HEADERS[200];
$response['head']['Cache-Control'] = "max-age={$expire}";
$response['head']['Pragma'] = "max-age={$expire}";
$response['head']['Last-Modified'] = date(self::DATE_FORMAT_HTTP, $fstat['mtime']);
$response['head']['Expires'] = "max-age={$expire}";
$response['body'] = file_get_contents($path);
}else{
$response['head']['Status'] = self::$HTTP_HEADERS[304];
$response['body'] = '';
} 
}else{
$response = $this->httpError(404, '页面不存在');
} 
}
return $response;
}
public function httpError($code, $content){
$response = array();
$version = CFtpServer::$software.'/'.CFtpServer::VERSION; 
$response['head']['Content-Type'] = 'text/html;charset=utf-8';
$response['head']['Status'] = self::$HTTP_HEADERS[$code];
$response['body'] = <<<html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8"> 
<title>FTP后台管理 </title>
</head>
<body>
<p>{$content}</p>
<div style="text-align:center">
<hr>
{$version} Copyright © 2015 by <a target='_new' href='http://www.realdatamed.com'>Real Data</a> All Rights Reserved.
</div>
</body>
</html>
html;
return $response;
}
static $HTTP_HEADERS = array(
100 => "100 Continue",
101 => "101 Switching Protocols",
200 => "200 OK",
201 => "201 Created",
204 => "204 No Content",
206 => "206 Partial Content",
300 => "300 Multiple Choices",
301 => "301 Moved Permanently",
302 => "302 Found",
303 => "303 See Other",
304 => "304 Not Modified",
307 => "307 Temporary Redirect",
400 => "400 Bad Request",
401 => "401 Unauthorized",
403 => "403 Forbidden",
404 => "404 Not Found",
405 => "405 Method Not Allowed",
406 => "406 Not Acceptable",
408 => "408 Request Timeout",
410 => "410 Gone",
413 => "413 Request Entity Too Large",
414 => "414 Request URI Too Long",
415 => "415 Unsupported Media Type",
416 => "416 Requested Range Not Satisfiable",
417 => "417 Expectation Failed",
500 => "500 Internal Server Error",
501 => "501 Method Not Implemented",
503 => "503 Service Unavailable",
506 => "506 Variant Also Negotiates",
);
static $MIME_TYPES = array( 
'jpg' => 'image/jpeg',
'bmp' => 'image/bmp',
'ico' => 'image/x-icon',
'gif' => 'image/gif',
'png' => 'image/png' ,
'bin' => 'application/octet-stream',
'js' => 'application/javascript',
'css' => 'text/css' ,
'html' => 'text/html' ,
'xml' => 'text/xml',
'tar' => 'application/x-tar' ,
'ppt' => 'application/vnd.ms-powerpoint',
'pdf' => 'application/pdf' ,
'svg' => ' image/svg+xml',
'woff' => 'application/x-font-woff',
'woff2' => 'application/x-font-woff', 
); 
}

4.FTP主类

有了前面类，就可以在ftp进行引用了。使用ssl时，请注意进行防火墙passive 端口范围的nat配置。　

defined('DEBUG_ON') or define('DEBUG_ON', false);
//主目录
defined('BASE_PATH') or define('BASE_PATH', __DIR__);
require_once BASE_PATH.'/inc/User.php';
require_once BASE_PATH.'/inc/ShareMemory.php';
require_once BASE_PATH.'/web/CWebServer.php';
require_once BASE_PATH.'/inc/CSmtp.php';
class CFtpServer{
//软件版本
const VERSION = '2.0'; 
const EOF = "\r\n"; 
public static $software "FTP-Server";
private static $server_mode = SWOOLE_PROCESS; 
private static $pid_file;
private static $log_file; 
//待写入文件的日志队列（缓冲区）
private $queue = array();
private $pasv_port_range = array(55000,60000);
public $host = '0.0.0.0';
public $port = 21;
public $setting = array();
//最大连接数
public $max_connection = 50; 
//web管理端口
public $manager_port = 8080;
//tls
public $ftps_port = 990;
/**
* @var swoole_server
*/
protected $server;
protected $connection = array();
protected $session = array();
protected $user;//用户类，复制验证与权限
//共享内存类
protected $shm;//ShareMemory
/**
* 
* @var embedded http server
*/
protected $webserver;
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 静态方法
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
public static function setPidFile($pid_file){
self::$pid_file = $pid_file;
}
/**
* 服务启动控制方法
*/
public static function start($startFunc){
if(empty(self::$pid_file)){
exit("Require pid file.\n"); 
}
if(!extension_loaded('posix')){ 
exit("Require extension `posix`.\n"); 
}
if(!extension_loaded('swoole')){ 
exit("Require extension `swoole`.\n"); 
}
if(!extension_loaded('shmop')){
exit("Require extension `shmop`.\n");
}
if(!extension_loaded('openssl')){
exit("Require extension `openssl`.\n");
}
$pid_file = self::$pid_file;
$server_pid = 0;
if(is_file($pid_file)){
$server_pid = file_get_contents($pid_file);
}
global $argv;
if(empty($argv[1])){
goto usage;
}elseif($argv[1] == 'reload'){
if (empty($server_pid)){
exit("FtpServer is not running\n");
}
posix_kill($server_pid, SIGUSR1);
exit;
}elseif ($argv[1] == 'stop'){
if (empty($server_pid)){
exit("FtpServer is not running\n");
}
posix_kill($server_pid, SIGTERM);
exit;
}elseif ($argv[1] == 'start'){
//已存在ServerPID，并且进程存在
if (!empty($server_pid) and posix_kill($server_pid,(int) 0)){
exit("FtpServer is already running.\n");
}
//启动服务器
$startFunc(); 
}else{
usage:
exit("Usage: php {$argv[0]} start|stop|reload\n");
}
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 方法
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
public function __construct($host,$port){
$this->user = new User();
$this->shm = new ShareMemory();
$this->shm->write(array());
$flag = SWOOLE_SOCK_TCP;
$this->server = new swoole_server($host,$port,self::$server_mode,$flag);
$this->host = $host;
$this->port = $port;
$this->setting = array(
'backlog' => 128, 
'dispatch_mode' => 2,
); 
}
public function daemonize(){
$this->setting['daemonize'] = 1; 
}
public function getConnectionInfo($fd){
return $this->server->connection_info($fd); 
}
/**
* 启动服务进程
* @param array $setting
* @throws Exception
*/ 
public function run($setting = array()){
$this->setting = array_merge($this->setting,$setting); 
//不使用swoole的默认日志
if(isset($this->setting['log_file'])){
self::$log_file = $this->setting['log_file'];
unset($this->setting['log_file']);
} 
if(isset($this->setting['max_connection'])){
$this->max_connection = $this->setting['max_connection'];
unset($this->setting['max_connection']);
}
if(isset($this->setting['manager_port'])){
$this->manager_port = $this->setting['manager_port'];
unset($this->setting['manager_port']);
}
if(isset($this->setting['ftps_port'])){
$this->ftps_port = $this->setting['ftps_port'];
unset($this->setting['ftps_port']);
}
if(isset($this->setting['passive_port_range'])){
$this->pasv_port_range = $this->setting['passive_port_range'];
unset($this->setting['passive_port_range']);
} 
$this->server->set($this->setting);
$version = explode('.', SWOOLE_VERSION);
if($version[0] == 1 && $version[1] < 7 && $version[2] <20){
throw new Exception('Swoole version require 1.7.20 +.');
}
//事件绑定
$this->server->on('start',array($this,'onMasterStart'));
$this->server->on('shutdown',array($this,'onMasterStop'));
$this->server->on('ManagerStart',array($this,'onManagerStart'));
$this->server->on('ManagerStop',array($this,'onManagerStop'));
$this->server->on('WorkerStart',array($this,'onWorkerStart'));
$this->server->on('WorkerStop',array($this,'onWorkerStop'));
$this->server->on('WorkerError',array($this,'onWorkerError'));
$this->server->on('Connect',array($this,'onConnect'));
$this->server->on('Receive',array($this,'onReceive'));
$this->server->on('Close',array($this,'onClose'));
//管理端口
$this->server->addlistener($this->host,$this->manager_port,SWOOLE_SOCK_TCP);
//tls
$this->server->addlistener($this->host,$this->ftps_port,SWOOLE_SOCK_TCP | SWOOLE_SSL);
$this->server->start();
}
public function log($msg,$level = 'debug',$flush = false){ 
if(DEBUG_ON){
$log = date('Y-m-d H:i:s').' ['.$level."]\t" .$msg."\n";
if(!empty(self::$log_file)){
$debug_file = dirname(self::$log_file).'/debug.log'; 
file_put_contents($debug_file, $log,FILE_APPEND);
if(filesize($debug_file) > 10485760){//10M
unlink($debug_file);
}
}
echo $log; 
}
if($level != 'debug'){
//日志记录 
$this->queue[] = date('Y-m-d H:i:s')."\t[".$level."]\t".$msg; 
} 
if(count($this->queue)>10 && !empty(self::$log_file) || $flush){
if (filesize(self::$log_file) > 209715200){ //200M 
rename(self::$log_file,self::$log_file.'.'.date('His'));
}
$logs = '';
foreach ($this->queue as $q){
$logs .= $q."\n";
}
file_put_contents(self::$log_file, $logs,FILE_APPEND);
$this->queue = array();
} 
}
public function shutdown(){
return $this->server->shutdown();
}
public function close($fd){
return $this->server->close($fd);
}
public function send($fd,$data){
$data = strtr($data,array("\n" => "", "\0" => "", "\r" => ""));
$this->log("[-->]\t" . $data);
return $this->server->send($fd,$data.self::EOF);
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 事件回调
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
public function onMasterStart($serv){
global $argv;
swoole_set_process_name('php '.$argv[0].': master -host='.$this->host.' -port='.$this->port.'/'.$this->manager_port);
if(!empty($this->setting['pid_file'])){
file_put_contents(self::$pid_file, $serv->master_pid);
}
$this->log('Master started.');
}
public function onMasterStop($serv){
if (!empty($this->setting['pid_file'])){
unlink(self::$pid_file);
}
$this->shm->delete();
$this->log('Master stop.');
}
public function onManagerStart($serv){
global $argv;
swoole_set_process_name('php '.$argv[0].': manager');
$this->log('Manager started.');
}
public function onManagerStop($serv){
$this->log('Manager stop.');
}
public function onWorkerStart($serv,$worker_id){
global $argv;
if($worker_id >= $serv->setting['worker_num']) {
swoole_set_process_name("php {$argv[0]}: worker [task]");
} else {
swoole_set_process_name("php {$argv[0]}: worker [{$worker_id}]");
}
$this->log("Worker {$worker_id} started.");
}
public function onWorkerStop($serv,$worker_id){
$this->log("Worker {$worker_id} stop.");
}
public function onWorkerError($serv,$worker_id,$worker_pid,$exit_code){
$this->log("Worker {$worker_id} error:{$exit_code}.");
}
public function onConnect($serv,$fd,$from_id){
$info = $this->getConnectionInfo($fd);
if($info['server_port'] == $this->manager_port){
//web请求
$this->webserver = new CWebServer();
}else{
$this->send($fd, "220---------- Welcome to " . self::$software . " ----------");
$this->send($fd, "220-Local time is now " . date("H:i"));
$this->send($fd, "220 This is a private system - No anonymous login");
if(count($this->server->connections) <= $this->max_connection){
if($info['server_port'] == $this->port && isset($this->setting['force_ssl']) && $this->setting['force_ssl']){
//如果启用强制ssl 
$this->send($fd, "421 Require implicit FTP over tls, closing control connection.");
$this->close($fd);
return ;
}
$this->connection[$fd] = array();
$this->session = array();
$this->queue = array(); 
}else{ 
$this->send($fd, "421 Too many connections, closing control connection.");
$this->close($fd);
}
}
}
public function onReceive($serv,$fd,$from_id,$recv_data){
$info = $this->getConnectionInfo($fd);
if($info['server_port'] == $this->manager_port){
//web请求
$this->webserver->onReceive($this->server, $fd, $recv_data);
}else{
$read = trim($recv_data);
$this->log("[<--]\t" . $read);
$cmd = explode(" ", $read); 
$func = 'cmd_'.strtoupper($cmd[0]);
$data = trim(str_replace($cmd[0], '', $read));
if (!method_exists($this, $func)){
$this->send($fd, "500 Unknown Command");
return;
}
if (empty($this->connection[$fd]['login'])){
switch($cmd[0]){
case 'TYPE':
case 'USER':
case 'PASS':
case 'QUIT':
case 'AUTH':
case 'PBSZ':
break;
default:
$this->send($fd,"530 You aren't logged in");
return;
}
}
$this->$func($fd,$data);
}
} 
public function onClose($serv,$fd,$from_id){
//在线用户 
$shm_data = $this->shm->read();
if($shm_data !== false){
if(isset($shm_data['online'])){
$list = array();
foreach($shm_data['online'] as $u => $info){ 
if(!preg_match('/\.*-'.$fd.'$/',$u,$m))
$list[$u] = $info;
}
$shm_data['online'] = $list;
$this->shm->write($shm_data); 
} 
}
$this->log('Socket '.$fd.' close. Flush the logs.','debug',true);
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 工具函数
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/ 
/**
* 获取用户名
* @param $fd
*/
public function getUser($fd){
return isset($this->connection[$fd]['user'])?$this->connection[$fd]['user']:'';
}
/**
* 获取文件全路径
* @param $user
* @param $file
* @return string|boolean
*/
public function getFile($user, $file){
$file = $this->fillDirName($user, $file); 
if (is_file($file)){
return realpath($file);
}else{
return false;
}
}
/**
* 遍历目录
* @param $rdir
* @param $showHidden
* @param $format list/mlsd
* @return string
* 
* list 使用local时间
* mlsd 使用gmt时间
*/
public function getFileList($user, $rdir, $showHidden = false, $format = 'list'){
$filelist = '';
if($format == 'mlsd'){
$stats = stat($rdir);
$filelist.= 'Type=cdir;Modify='.gmdate('YmdHis',$stats['mtime']).';UNIX.mode=d'.$this->mode2char($stats['mode']).'; '.$this->getUserDir($user)."\r\n";
}
if ($handle = opendir($rdir)){
$isListable = $this->user->isFolderListable($user, $rdir);
while (false !== ($file = readdir($handle))){
if ($file == '.' or $file == '..'){
continue;
}
if ($file{0} == "." and !$showHidden){
continue;
}
//如果当前目录$rdir不允许列出，则判断当前目录下的目录是否配置为可以列出 
if(!$isListable){ 
$dir = $rdir . $file;
if(is_dir($dir)){
$dir = $this->joinPath($dir, '/');
if($this->user->isFolderListable($user, $dir)){ 
goto listFolder;
}
}
continue;
} 
listFolder: 
$stats = stat($rdir . $file);
if (is_dir($rdir . "/" . $file)) $mode = "d"; else $mode = "-";
$mode .= $this->mode2char($stats['mode']);
if($format == 'mlsd'){
if($mode[0] == 'd'){
$filelist.= 'Type=dir;Modify='.gmdate('YmdHis',$stats['mtime']).';UNIX.mode='.$mode.'; '.$file."\r\n";
}else{
$filelist.= 'Type=file;Size='.$stats['size'].';Modify='.gmdate('YmdHis',$stats['mtime']).';UNIX.mode='.$mode.'; '.$file."\r\n";
}
}else{
$uidfill = "";
for ($i = strlen($stats['uid']); $i < 5; $i++) $uidfill .= " ";
$gidfill = "";
for ($i = strlen($stats['gid']); $i < 5; $i++) $gidfill .= " ";
$sizefill = "";
for ($i = strlen($stats['size']); $i < 11; $i++) $sizefill .= " ";
$nlinkfill = "";
for ($i = strlen($stats['nlink']); $i < 5; $i++) $nlinkfill .= " ";
$mtime = date("M d H:i", $stats['mtime']);
$filelist .= $mode . $nlinkfill . $stats['nlink'] . " " . $stats['uid'] . $uidfill . $stats['gid'] . $gidfill . $sizefill . $stats['size'] . " " . $mtime . " " . $file . "\r\n";
}
}
closedir($handle);
}
return $filelist;
}
/**
* 将文件的全新从数字转换为字符串
* @param int $int
*/
public function mode2char($int){
$mode = '';
$moded = sprintf("%o", ($int & 000777));
$mode1 = substr($moded, 0, 1);
$mode2 = substr($moded, 1, 1);
$mode3 = substr($moded, 2, 1);
switch ($mode1) {
case "0":
$mode .= "---";
break;
case "1":
$mode .= "--x";
break;
case "2":
$mode .= "-w-";
break;
case "3":
$mode .= "-wx";
break;
case "4":
$mode .= "r--";
break;
case "5":
$mode .= "r-x";
break;
case "6":
$mode .= "rw-";
break;
case "7":
$mode .= "rwx";
break;
}
switch ($mode2) {
case "0":
$mode .= "---";
break;
case "1":
$mode .= "--x";
break;
case "2":
$mode .= "-w-";
break;
case "3":
$mode .= "-wx";
break;
case "4":
$mode .= "r--";
break;
case "5":
$mode .= "r-x";
break;
case "6":
$mode .= "rw-";
break;
case "7":
$mode .= "rwx";
break;
}
switch ($mode3) {
case "0":
$mode .= "---";
break;
case "1":
$mode .= "--x";
break;
case "2":
$mode .= "-w-";
break;
case "3":
$mode .= "-wx";
break;
case "4":
$mode .= "r--";
break;
case "5":
$mode .= "r-x";
break;
case "6":
$mode .= "rw-";
break;
case "7":
$mode .= "rwx";
break;
}
return $mode;
}
/**
* 设置用户当前的路径 
* @param $user
* @param $pwd
*/
public function setUserDir($user, $cdir){
$old_dir = $this->session[$user]['pwd'];
if ($old_dir == $cdir){
return $cdir;
} 
if($cdir[0] != '/')
$cdir = $this->joinPath($old_dir,$cdir); 
$this->session[$user]['pwd'] = $cdir;
$abs_dir = realpath($this->getAbsDir($user));
if (!$abs_dir){
$this->session[$user]['pwd'] = $old_dir;
return false;
}
$this->session[$user]['pwd'] = $this->joinPath('/',substr($abs_dir, strlen($this->session[$user]['home'])));
$this->session[$user]['pwd'] = $this->joinPath($this->session[$user]['pwd'],'/');
$this->log("CHDIR: $old_dir -> $cdir");
return $this->session[$user]['pwd'];
}
/**
* 获取全路径
* @param $user
* @param $file
* @return string
*/
public function fillDirName($user, $file){ 
if (substr($file, 0, 1) != "/"){
$file = '/'.$file;
$file = $this->joinPath($this->getUserDir( $user), $file);
} 
$file = $this->joinPath($this->session[$user]['home'],$file);
return $file;
}
/**
* 获取用户路径
* @param unknown $user
*/
public function getUserDir($user){
return $this->session[$user]['pwd'];
}
/**
* 获取用户的当前文件系统绝对路径，非chroot路径
* @param $user
* @return string
*/
public function getAbsDir($user){
$rdir = $this->joinPath($this->session[$user]['home'],$this->session[$user]['pwd']);
return $rdir;
}
/**
* 路径连接
* @param string $path1
* @param string $path2
* @return string
*/
public function joinPath($path1,$path2){ 
$path1 = rtrim($path1,'/');
$path2 = trim($path2,'/');
return $path1.'/'.$path2;
}
/**
* IP判断
* @param string $ip
* @return boolean
*/
public function isIPAddress($ip){
if (!is_numeric($ip[0]) || $ip[0] < 1 || $ip[0] > 254) {
return false;
} elseif (!is_numeric($ip[1]) || $ip[1] < 0 || $ip[1] > 254) {
return false;
} elseif (!is_numeric($ip[2]) || $ip[2] < 0 || $ip[2] > 254) {
return false;
} elseif (!is_numeric($ip[3]) || $ip[3] < 1 || $ip[3] > 254) {
return false;
} elseif (!is_numeric($ip[4]) || $ip[4] < 1 || $ip[4] > 500) {
return false;
} elseif (!is_numeric($ip[5]) || $ip[5] < 1 || $ip[5] > 500) {
return false;
} else {
return true;
}
}
/**
* 获取pasv端口
* @return number
*/
public function getPasvPort(){
$min = is_int($this->pasv_port_range[0])?$this->pasv_port_range[0]:55000;
$max = is_int($this->pasv_port_range[1])?$this->pasv_port_range[1]:60000;
$max = $max <= 65535 ? $max : 65535;
$loop = 0;
$port = 0;
while($loop < 10){
$port = mt_rand($min, $max);
if($this->isAvailablePasvPort($port)){ 
break;
}
$loop++;
} 
return $port;
}
public function pushPasvPort($port){
$shm_data = $this->shm->read();
if($shm_data !== false){
if(isset($shm_data['pasv_port'])){
array_push($shm_data['pasv_port'], $port);
}else{
$shm_data['pasv_port'] = array($port);
}
$this->shm->write($shm_data);
$this->log('Push pasv port: '.implode(',', $shm_data['pasv_port']));
return true;
}
return false;
}
public function popPasvPort($port){
$shm_data = $this->shm->read();
if($shm_data !== false){
if(isset($shm_data['pasv_port'])){
$tmp = array();
foreach ($shm_data['pasv_port'] as $p){
if($p != $port){
$tmp[] = $p;
}
}
$shm_data['pasv_port'] = $tmp;
}
$this->shm->write($shm_data);
$this->log('Pop pasv port: '.implode(',', $shm_data['pasv_port']));
return true;
}
return false;
}
public function isAvailablePasvPort($port){
$shm_data = $this->shm->read();
if($shm_data !== false){
if(isset($shm_data['pasv_port'])){
return !in_array($port, $shm_data['pasv_port']);
}
return true;
}
return false;
}
/**
* 获取当前数据链接tcp个数
*/
public function getDataConnections(){
$shm_data = $this->shm->read();
if($shm_data !== false){
if(isset($shm_data['pasv_port'])){
return count($shm_data['pasv_port']);
} 
}
return 0;
} 
/**
* 关闭数据传输socket
* @param $user
* @return bool
*/
public function closeUserSock($user){
$peer = stream_socket_get_name($this->session[$user]['sock'], false);
list($ip,$port) = explode(':', $peer);
//释放端口占用
$this->popPasvPort($port);
fclose($this->session[$user]['sock']);
$this->session[$user]['sock'] = 0;
return true;
}
/**
* @param $user
* @return resource
*/
public function getUserSock($user){
//被动模式
if ($this->session[$user]['pasv'] == true){
if (empty($this->session[$user]['sock'])){
$addr = stream_socket_get_name($this->session[$user]['serv_sock'], false);
list($ip, $port) = explode(':', $addr);
$sock = stream_socket_accept($this->session[$user]['serv_sock'], 5);
if ($sock){
$peer = stream_socket_get_name($sock, true);
$this->log("Accept: success client is $peer.");
$this->session[$user]['sock'] = $sock;
//关闭server socket
fclose($this->session[$user]['serv_sock']);
}else{
$this->log("Accept: failed.");
//释放端口
$this->popPasvPort($port);
return false;
}
}
}
return $this->session[$user]['sock'];
}
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ FTP Command
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
//==================
//RFC959
//==================
/**
* 登录用户名
* @param $fd
* @param $data
*/
public function cmd_USER($fd, $data){
if (preg_match("/^([a-z0-9.@]+)$/", $data)){
$user = strtolower($data);
$this->connection[$fd]['user'] = $user; 
$this->send($fd, "331 User $user OK. Password required");
}else{
$this->send($fd, "530 Login authentication failed");
}
}
/**
* 登录密码
* @param $fd
* @param $data
*/
public function cmd_PASS($fd, $data){
$user = $this->connection[$fd]['user'];
$pass = $data;
$info = $this->getConnectionInfo($fd);
$ip = $info['remote_ip'];
//判断登陆失败次数
if($this->user->isAttemptLimit($this->shm, $user, $ip)){
$this->send($fd, "530 Login authentication failed: Too many login attempts. Blocked in 10 minutes.");
return;
} 
if ($this->user->checkUser($user, $pass, $ip)){
$dir = "/";
$this->session[$user]['pwd'] = $dir;
//ftp根目录 
$this->session[$user]['home'] = $this->user->getHomeDir($user);
if(empty($this->session[$user]['home']) || !is_dir($this->session[$user]['home'])){
$this->send($fd, "530 Login authentication failed: `home` path error.");
}else{
$this->connection[$fd]['login'] = true;
//在线用户
$shm_data = $this->user->addOnline($this->shm, $this->server, $user, $fd, $ip);
$this->log('SHM: '.json_encode($shm_data) );
$this->send($fd, "230 OK. Current restricted directory is " . $dir); 
$this->log('User '.$user .' has login successfully! IP: '.$ip,'warn');
}
}else{
$this->user->addAttempt($this->shm, $user, $ip);
$this->log('User '.$user .' login fail! IP: '.$ip,'warn');
$this->send($fd, "530 Login authentication failed: check your pass or ip allow rules.");
}
}
/**
* 更改当前目录
* @param $fd
* @param $data
*/
public function cmd_CWD($fd, $data){
$user = $this->getUser($fd);
if (($dir = $this->setUserDir($user, $data)) != false){
$this->send($fd, "250 OK. Current directory is " . $dir);
}else{
$this->send($fd, "550 Can't change directory to " . $data . ": No such file or directory");
}
}
/**
* 返回上级目录
* @param $fd
* @param $data
*/
public function cmd_CDUP($fd, $data){
$data = '..';
$this->cmd_CWD($fd, $data);
}
/**
* 退出服务器
* @param $fd
* @param $data
*/
public function cmd_QUIT($fd, $data){
$this->send($fd,"221 Goodbye.");
unset($this->connection[$fd]);
}
/**
* 获取当前目录
* @param $fd
* @param $data
*/
public function cmd_PWD($fd, $data){
$user = $this->getUser($fd);
$this->send($fd, "257 \"" . $this->getUserDir($user) . "\" is your current location");
}
/**
* 下载文件
* @param $fd
* @param $data
*/
public function cmd_RETR($fd, $data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (!$ftpsock){
$this->send($fd, "425 Connection Error");
return;
}
if (($file = $this->getFile($user, $data)) != false){
if($this->user->isReadable($user, $file)){
$this->send($fd, "150 Connecting to client");
if ($fp = fopen($file, "rb")){
//断点续传
if(isset($this->session[$user]['rest_offset'])){
if(!fseek($fp, $this->session[$user]['rest_offset'])){
$this->log("RETR at offset ".ftell($fp));
}else{
$this->log("RETR at offset ".ftell($fp).' fail.');
}
unset($this->session[$user]['rest_offset']);
} 
while (!feof($fp)){ 
$cont = fread($fp, 8192); 
if (!fwrite($ftpsock, $cont)) break; 
}
if (fclose($fp) and $this->closeUserSock($user)){
$this->send($fd, "226 File successfully transferred");
$this->log($user."\tGET:".$file,'info');
}else{
$this->send($fd, "550 Error during file-transfer");
}
}else{
$this->send($fd, "550 Can't open " . $data . ": Permission denied");
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
}else{
$this->send($fd, "550 Can't open " . $data . ": No such file or directory");
}
}
/**
* 上传文件
* @param $fd
* @param $data
*/
public function cmd_STOR($fd, $data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (!$ftpsock){
$this->send($fd, "425 Connection Error");
return;
}
$file = $this->fillDirName($user, $data);
$isExist = false;
if(file_exists($file))$isExist = true;
if((!$isExist && $this->user->isWritable($user, $file)) ||
($isExist && $this->user->isAppendable($user, $file))){
if($isExist){
$fp = fopen($file, "rb+");
$this->log("OPEN for STOR.");
}else{
$fp = fopen($file, 'wb');
$this->log("CREATE for STOR.");
}
if (!$fp){
$this->send($fd, "553 Can't open that file: Permission denied");
}else{
//断点续传，需要Append权限
if(isset($this->session[$user]['rest_offset'])){
if(!fseek($fp, $this->session[$user]['rest_offset'])){
$this->log("STOR at offset ".ftell($fp));
}else{
$this->log("STOR at offset ".ftell($fp).' fail.');
}
unset($this->session[$user]['rest_offset']);
}
$this->send($fd, "150 Connecting to client");
while (!feof($ftpsock)){
$cont = fread($ftpsock, 8192);
if (!$cont) break;
if (!fwrite($fp, $cont)) break;
}
touch($file);//设定文件的访问和修改时间
if (fclose($fp) and $this->closeUserSock($user)){
$this->send($fd, "226 File successfully transferred");
$this->log($user."\tPUT: $file",'info');
}else{
$this->send($fd, "550 Error during file-transfer");
}
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
$this->closeUserSock($user);
}
}
/**
* 文件追加
* @param $fd
* @param $data
*/
public function cmd_APPE($fd,$data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (!$ftpsock){
$this->send($fd, "425 Connection Error");
return;
}
$file = $this->fillDirName($user, $data);
$isExist = false;
if(file_exists($file))$isExist = true;
if((!$isExist && $this->user->isWritable($user, $file)) ||
($isExist && $this->user->isAppendable($user, $file))){
$fp = fopen($file, "rb+");
if (!$fp){
$this->send($fd, "553 Can't open that file: Permission denied");
}else{
//断点续传，需要Append权限
if(isset($this->session[$user]['rest_offset'])){
if(!fseek($fp, $this->session[$user]['rest_offset'])){
$this->log("APPE at offset ".ftell($fp));
}else{
$this->log("APPE at offset ".ftell($fp).' fail.');
}
unset($this->session[$user]['rest_offset']);
}
$this->send($fd, "150 Connecting to client");
while (!feof($ftpsock)){
$cont = fread($ftpsock, 8192);
if (!$cont) break;
if (!fwrite($fp, $cont)) break;
}
touch($file);//设定文件的访问和修改时间
if (fclose($fp) and $this->closeUserSock($user)){
$this->send($fd, "226 File successfully transferred");
$this->log($user."\tAPPE: $file",'info');
}else{
$this->send($fd, "550 Error during file-transfer");
}
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
$this->closeUserSock($user);
}
}
/**
* 文件重命名,源文件
* @param $fd
* @param $data
*/
public function cmd_RNFR($fd, $data){
$user = $this->getUser($fd);
$file = $this->fillDirName($user, $data);
if (file_exists($file) || is_dir($file)){
$this->session[$user]['rename'] = $file;
$this->send($fd, "350 RNFR accepted - file exists, ready for destination"); 
}else{
$this->send($fd, "550 Sorry, but that '$data' doesn't exist");
}
}
/**
* 文件重命名,目标文件
* @param $fd
* @param $data
*/
public function cmd_RNTO($fd, $data){
$user = $this->getUser($fd);
$old_file = $this->session[$user]['rename'];
$new_file = $this->fillDirName($user, $data);
$isDir = false;
if(is_dir($old_file)){
$isDir = true;
$old_file = $this->joinPath($old_file, '/');
}
if((!$isDir && $this->user->isRenamable($user, $old_file)) || 
($isDir && $this->user->isFolderRenamable($user, $old_file))){
if (empty($old_file) or !is_dir(dirname($new_file))){
$this->send($fd, "451 Rename/move failure: No such file or directory");
}elseif (rename($old_file, $new_file)){
$this->send($fd, "250 File successfully renamed or moved");
$this->log($user."\tRENAME: $old_file to $new_file",'warn');
}else{
$this->send($fd, "451 Rename/move failure: Operation not permitted");
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
unset($this->session[$user]['rename']);
}
/**
* 删除文件
* @param $fd
* @param $data
*/
public function cmd_DELE($fd, $data){
$user = $this->getUser($fd);
$file = $this->fillDirName($user, $data);
if($this->user->isDeletable($user, $file)){
if (!file_exists($file)){
$this->send($fd, "550 Could not delete " . $data . ": No such file or directory");
}
elseif (unlink($file)){
$this->send($fd, "250 Deleted " . $data);
$this->log($user."\tDEL: $file",'warn');
}else{
$this->send($fd, "550 Could not delete " . $data . ": Permission denied");
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
}
/**
* 创建目录
* @param $fd
* @param $data
*/
public function cmd_MKD($fd, $data){
$user = $this->getUser($fd);
$path = '';
if($data[0] == '/'){
$path = $this->joinPath($this->session[$user]['home'],$data);
}else{
$path = $this->joinPath($this->getAbsDir($user),$data);
}
$path = $this->joinPath($path, '/'); 
if($this->user->isFolderCreatable($user, $path)){
if (!is_dir(dirname($path))){
$this->send($fd, "550 Can't create directory: No such file or directory");
}elseif(file_exists($path)){
$this->send($fd, "550 Can't create directory: File exists");
}else{
if (mkdir($path)){
$this->send($fd, "257 \"" . $data . "\" : The directory was successfully created");
$this->log($user."\tMKDIR: $path",'info');
}else{
$this->send($fd, "550 Can't create directory: Permission denied");
}
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
}
/**
* 删除目录
* @param $fd
* @param $data
*/
public function cmd_RMD($fd, $data){
$user = $this->getUser($fd);
$dir = '';
if($data[0] == '/'){
$dir = $this->joinPath($this->session[$user]['home'], $data);
}else{
$dir = $this->fillDirName($user, $data);
}
$dir = $this->joinPath($dir, '/');
if($this->user->isFolderDeletable($user, $dir)){
if (is_dir(dirname($dir)) and is_dir($dir)){
if (count(glob($dir . "/*"))){
$this->send($fd, "550 Can't remove directory: Directory not empty");
}elseif (rmdir($dir)){
$this->send($fd, "250 The directory was successfully removed");
$this->log($user."\tRMDIR: $dir",'warn');
}else{
$this->send($fd, "550 Can't remove directory: Operation not permitted");
}
}elseif (is_dir(dirname($dir)) and file_exists($dir)){
$this->send($fd, "550 Can't remove directory: Not a directory");
}else{
$this->send($fd, "550 Can't create directory: No such file or directory");
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
}
/**
* 得到服务器类型
* @param $fd
* @param $data
*/
public function cmd_SYST($fd, $data){
$this->send($fd, "215 UNIX Type: L8");
}
/**
* 权限控制
* @param $fd
* @param $data
*/
public function cmd_SITE($fd, $data){
if (substr($data, 0, 6) == "CHMOD "){
$user = $this->getUser($fd);
$chmod = explode(" ", $data, 3);
$file = $this->fillDirName($user, $chmod[2]);
if($this->user->isWritable($user, $file)){
if (chmod($file, octdec($chmod[1]))){
$this->send($fd, "200 Permissions changed on {$chmod[2]}");
$this->log($user."\tCHMOD: $file to {$chmod[1]}",'info');
}else{
$this->send($fd, "550 Could not change perms on " . $chmod[2] . ": Permission denied");
}
}else{
$this->send($fd, "550 You're unauthorized: Permission denied");
}
}else{
$this->send($fd, "500 Unknown Command");
}
} 
/**
* 更改传输类型
* @param $fd
* @param $data
*/
public function cmd_TYPE($fd, $data){
switch ($data){
case "A":
$type = "ASCII";
break;
case "I":
$type = "8-bit binary";
break;
}
$this->send($fd, "200 TYPE is now " . $type);
}
/**
* 遍历目录
* @param $fd
* @param $data
*/
public function cmd_LIST($fd, $data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (!$ftpsock){
$this->send($fd, "425 Connection Error");
return;
} 
$path = $this->joinPath($this->getAbsDir($user),'/');
$this->send($fd, "150 Opening ASCII mode data connection for file list");
$filelist = $this->getFileList($user, $path, true);
fwrite($ftpsock, $filelist); 
$this->send($fd, "226 Transfer complete."); 
$this->closeUserSock($user);
}
/**
* 建立数据传输通
* @param $fd
* @param $data
*/
// 不使用主动模式 
// public function cmd_PORT($fd, $data){
// $user = $this->getUser($fd);
// $port = explode(",", $data);
// if (count($port) != 6){
// $this->send($fd, "501 Syntax error in IP address");
// }else{
// if (!$this->isIPAddress($port)){
// $this->send($fd, "501 Syntax error in IP address");
// return;
// }
// $ip = $port[0] . "." . $port[1] . "." . $port[2] . "." . $port[3];
// $port = hexdec(dechex($port[4]) . dechex($port[5]));
// if ($port < 1024){
// $this->send($fd, "501 Sorry, but I won't connect to ports < 1024");
// }elseif ($port > 65000){
// $this->send($fd, "501 Sorry, but I won't connect to ports > 65000");
// }else{ 
// $ftpsock = fsockopen($ip, $port); 
// if ($ftpsock){
// $this->session[$user]['sock'] = $ftpsock;
// $this->session[$user]['pasv'] = false; 
// $this->send($fd, "200 PORT command successful"); 
// }else{
// $this->send($fd, "501 Connection failed");
// }
// }
// }
// }
/**
* 被动模式 
* @param unknown $fd
* @param unknown $data
*/
public function cmd_PASV($fd, $data){
$user = $this->getUser($fd);
$ssl = false;
$pasv_port = $this->getPasvPort();
if($this->connection[$fd]['ssl'] === true){
$ssl = true;
$context = stream_context_create(); 
// local_cert must be in PEM format
stream_context_set_option($context, 'ssl', 'local_cert', $this->setting['ssl_cert_file']);
// Path to local private key file 
stream_context_set_option($context, 'ssl', 'local_pk', $this->setting['ssl_key_file']);
stream_context_set_option($context, 'ssl', 'allow_self_signed', true);
stream_context_set_option($context, 'ssl', 'verify_peer', false);
stream_context_set_option($context, 'ssl', 'verify_peer_name', false); 
stream_context_set_option($context, 'ssl', 'passphrase', '');
// Create the server socket
$sock = stream_socket_server('ssl://0.0.0.0:'.$pasv_port, $errno, $errstr, STREAM_SERVER_BIND | STREAM_SERVER_LISTEN, $context);
}else{
$sock = stream_socket_server('tcp://0.0.0.0:'.$pasv_port, $errno, $errstr, STREAM_SERVER_BIND | STREAM_SERVER_LISTEN);
}
if ($sock){
$addr = stream_socket_get_name($sock, false);
list($ip, $port) = explode(':', $addr);
$ipArr = swoole_get_local_ip();
foreach($ipArr as $nic => $addr){
$ip = $addr;
}
$this->log("ServerSock: $ip:$port");
$ip = str_replace('.', ',', $ip);
$this->send($fd, "227 Entering Passive Mode ({$ip},".(intval($port) >> 8 & 0xff).",".(intval($port) & 0xff)."). ".$port." ".($ssl?'ssl':''));
$this->session[$user]['serv_sock'] = $sock;
$this->session[$user]['pasv'] = true;
$this->pushPasvPort($port);
}else{
fclose($sock);
$this->send($fd, "500 failed to create data socket: ".$errstr);
}
}
public function cmd_NOOP($fd,$data){
$this->send($fd, "200 OK");
}
//==================
//RFC2228
//==================
public function cmd_PBSZ($fd,$data){
$this->send($fd, '200 Command okay.');
}
public function cmd_PROT($fd,$data){
if(trim($data) == 'P'){
$this->connection[$fd]['ssl'] = true;
$this->send($fd, '200 Set Private level on data connection.');
}elseif(trim($data) == 'C'){
$this->connection[$fd]['ssl'] = false;
$this->send($fd, '200 Set Clear level on data connection.');
}else{
$this->send($fd, '504 Command not implemented for that parameter.');
}
}
//==================
//RFC2389
//==================
public function cmd_FEAT($fd,$data){
$this->send($fd, '211-Features supported');
$this->send($fd, 'MDTM');
$this->send($fd, 'SIZE');
$this->send($fd, 'SITE CHMOD');
$this->send($fd, 'REST STREAM');
$this->send($fd, 'MLSD Type*;Size*;Modify*;UNIX.mode*;');
$this->send($fd, 'PBSZ');
$this->send($fd, 'PROT');
$this->send($fd, '211 End');
}
//关闭utf8对中文文件名有影响
public function cmd_OPTS($fd,$data){
$this->send($fd, '502 Command not implemented.');
}
//==================
//RFC3659
//==================
/**
* 获取文件修改时间
* @param unknown $fd
* @param unknown $data
*/
public function cmd_MDTM($fd,$data){
$user = $this->getUser($fd);
if (($file = $this->getFile($user, $data)) != false){
$this->send($fd, '213 '.date('YmdHis.u',filemtime($file)));
}else{
$this->send($fd, '550 No file named "'.$data.'"');
}
}
/**
* 获取文件大小
* @param $fd
* @param $data
*/
public function cmd_SIZE($fd,$data){
$user = $this->getUser($fd);
if (($file = $this->getFile($user, $data)) != false){
$this->send($fd, '213 '.filesize($file));
}else{
$this->send($fd, '550 No file named "'.$data.'"');
}
}
/**
* 获取文件列表
* @param unknown $fd
* @param unknown $data
*/
public function cmd_MLSD($fd,$data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (!$ftpsock){
$this->send($fd, "425 Connection Error");
return;
}
$path = $this->joinPath($this->getAbsDir($user),'/');
$this->send($fd, "150 Opening ASCII mode data connection for file list");
$filelist = $this->getFileList($user, $path, true,'mlsd');
fwrite($ftpsock, $filelist);
$this->send($fd, "226 Transfer complete.");
$this->closeUserSock($user);
}
/**
* 设置文件offset
* @param unknown $fd
* @param unknown $data
*/
public function cmd_REST($fd,$data){
$user = $this->getUser($fd);
$data= preg_replace('/[^0-9]/', '', $data);
if($data != ''){
$this->session[$user]['rest_offset'] = $data;
$this->send($fd, '350 Restarting at '.$data.'. Send STOR or RETR');
}else{
$this->send($fd, '500 Syntax error, offset unrecognized.');
}
}
/**
* 获取文件hash值
* @param unknown $fd
* @param unknown $data
*/
public function cmd_HASH($fd,$data){
$user = $this->getUser($fd);
$ftpsock = $this->getUserSock($user);
if (($file = $this->getFile($user, $data)) != false){
if(is_file($file)){
$algo = 'sha512';
$this->send($fd, "200 ".hash_file($algo, $file));
}else{
$this->send($fd, "550 Can't open " . $data . ": No such file。");
} 
}else{
$this->send($fd, "550 Can't open " . $data . ": No such file。");
}
}
/**
* 控制台命令
* @param unknown $fd
* @param unknown $data
*/
public function cmd_CONSOLE($fd,$data){
$group = $this->user->getUserProfile($this->getUser($fd));
$group = $group['group'];
if($group != 'admin'){
$this->send($fd, "550 You're unauthorized: Permission denied");
return;
} 
$data = explode('||', $data);
$cmd = strtoupper($data[0]);
switch ($cmd){ 
case 'USER-ONLINE':
$shm_data = $this->shm->read(); 
$list = array();
if($shm_data !== false){
if(isset($shm_data['online'])){
$list = $shm_data['online'];
} 
}
$this->send($fd, '200 '.json_encode($list));
break; 
//Format: user-add||{"user":"","pass":"","home":"","expired":"","active":boolean,"group":"","description":"","email":""}
case 'USER-ADD':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$user = isset($json['user'])?$json['user']:'';
$pass = isset($json['pass'])?$json['pass']:'';
$home = isset($json['home'])?$json['home']:'';
$expired = isset($json['expired'])?$json['expired']:'1999-01-01';
$active = isset($json['active'])?$json['active']:false;
$group = isset($json['group'])?$json['group']:'';
$description = isset($json['description'])?$json['description']:'';
$email = isset($json['email'])?$json['email']:'';
if($this->user->addUser($user,$pass,$home,$expired,$active,$group,$description,$email)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 User "'.$user.'" added.');
}else{
$this->send($fd, '550 Add fail!');
}
}else{
$this->send($fd, '500 Syntax error: USER-ADD||{"user":"","pass":"","home":"","expired":"","active":boolean,"group":"","description":""}');
}
break;
//Format: user-set-profile||{"user":"","profile":[]}
case 'USER-SET-PROFILE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$user = isset($json['user'])?$json['user']:'';
$profile = isset($json['profile'])?$json['profile']:array(); 
if($this->user->setUserProfile($user, $profile)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 User "'.$user.'" profile changed.');
}else{
$this->send($fd, '550 Set profile fail!');
}
}else{
$this->send($fd, '500 Syntax error: USER-SET-PROFILE||{"user":"","profile":[]}');
} 
break; 
//Format: user-get-profile||{"user":""}
case 'USER-GET-PROFILE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$user = isset($json['user'])?$json['user']:'';
$this->user->reload();
if($profile = $this->user->getUserProfile($user)){ 
$this->send($fd, '200 '.json_encode($profile));
}else{
$this->send($fd, '550 Get profile fail!');
}
}else{
$this->send($fd, '500 Syntax error: USER-GET-PROFILE||{"user":""}');
} 
break;
//Format: user-delete||{"user":""}
case 'USER-DELETE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$user = isset($json['user'])?$json['user']:'';
if($this->user->delUser($user)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 User '.$user.' deleted.');
}else{
$this->send($fd, '550 Delete user fail!');
}
}else{
$this->send($fd, '500 Syntax error: USER-DELETE||{"user":""}');
}
break;
case 'USER-LIST':
$this->user->reload();
$list = $this->user->getUserList();
$this->send($fd, '200 '.json_encode($list));
break;
//Format: group-add||{"group":"","home":""}
case 'GROUP-ADD':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$group = isset($json['group'])?$json['group']:''; 
$home = isset($json['home'])?$json['home']:''; 
if($this->user->addGroup($group, $home)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 Group "'.$group.'" added.');
}else{
$this->send($fd, '550 Add group fail!');
}
}else{
$this->send($fd, '500 Syntax error: GROUP-ADD||{"group":"","home":""}');
}
break;
//Format: group-set-profile||{"group":"","profile":[]}
case 'GROUP-SET-PROFILE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$group = isset($json['group'])?$json['group']:'';
$profile = isset($json['profile'])?$json['profile']:array();
if($this->user->setGroupProfile($group, $profile)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 Group "'.$group.'" profile changed.');
}else{
$this->send($fd, '550 Set profile fail!');
}
}else{
$this->send($fd, '500 Syntax error: GROUP-SET-PROFILE||{"group":"","profile":[]}');
}
break;
//Format: group-get-profile||{"group":""}
case 'GROUP-GET-PROFILE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$group = isset($json['group'])?$json['group']:'';
$this->user->reload();
if($profile = $this->user->getGroupProfile($group)){
$this->send($fd, '200 '.json_encode($profile));
}else{
$this->send($fd, '550 Get profile fail!');
}
}else{
$this->send($fd, '500 Syntax error: GROUP-GET-PROFILE||{"group":""}');
}
break;
//Format: group-delete||{"group":""}
case 'GROUP-DELETE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$group = isset($json['group'])?$json['group']:'';
if($this->user->delGroup($group)){
$this->user->save();
$this->user->reload();
$this->send($fd, '200 Group '.$group.' deleted.');
}else{
$this->send($fd, '550 Delete group fail!');
}
}else{
$this->send($fd, '500 Syntax error: GROUP-DELETE||{"group":""}');
}
break;
case 'GROUP-LIST':
$this->user->reload();
$list = $this->user->getGroupList();
$this->send($fd, '200 '.json_encode($list));
break;
//获取组用户列表
//Format: group-user-list||{"group":""}
case 'GROUP-USER-LIST':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$group = isset($json['group'])?$json['group']:'';
$this->user->reload();
$this->send($fd, '200 '.json_encode($this->user->getUserListOfGroup($group)));
}else{
$this->send($fd, '500 Syntax error: GROUP-USER-LIST||{"group":""}');
}
break;
// 获取磁盘空间
//Format: disk-total||{"path":""}
case 'DISK-TOTAL':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$path = isset($json['path'])?$json['path']:'';
$size = 0;
if($path){
$size = disk_total_space($path);
}
$this->send($fd, '200 '.$size);
}else{
$this->send($fd, '500 Syntax error: DISK-TOTAL||{"path":""}');
}
break;
// 获取磁盘空间
//Format: disk-total||{"path":""}
case 'DISK-FREE':
if(isset($data[1])){
$json = json_decode(trim($data[1]),true);
$path = isset($json['path'])?$json['path']:'';
$size = 0;
if($path){
$size = disk_free_space($path);
}
$this->send($fd, '200 '.$size);
}else{
$this->send($fd, '500 Syntax error: DISK-FREE||{"path":""}');
}
break;
case 'HELP':
$list = 'USER-ONLINE USER-ADD USER-SET-PROFILE USER-GET-PROFILE USER-DELETE USER-LIST GROUP-ADD GROUP-SET-PROFILE GROUP-GET-PROFILE GROUP-DELETE GROUP-LIST GROUP-USER-LIST DISK-TOTAL DISK-FREE';
$this->send($fd, '200 '.$list);
break;
default:
$this->send($fd, '500 Syntax error.');
}
} 
}

总结：

至此，我们就可以实现一个完整的ftp服务器了。这个服务器的功能可以进行完全个性化定制。如果您有好的建议，也可以留言给我，谢谢。