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初始化

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liut
2021-10-12 11:06:24 +08:00
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public/server/index.php
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<?php
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization");
header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,OPTIONS,PATCH');
class Server{
const DS = '/';
protected $config = [];
protected $runtime_path;
/**
* 初始化
* @param array $config
*/
public function __construct(array $config = [])
{
// 默认配置
$default = [
'token' => '',
'chunks_path' => '/chunks/',
'upload_path' => '/upload/',
'min_file_size' => 2 * 1024 * 1024
];
// 获取配置信息
$this->config = array_merge($default,$config);
// 运行目录
$this->runtime_path = $this->getFitSeparator(__DIR__);
}
/**
* 构建器
* @param $config
*/
public static function create($config){
try {
(new self($config))->start();
}catch (Throwable $e){
if($e->getCode() == 077)
exit($e->getMessage());
exit(json_encode(['code' => 0,'msg' => $e->getMessage()]));
}
}
/**
* 运行远程服务器
* @throws Exception
*/
public function start(){
// 允许的操作类型
$action = ['upload', 'download'];
// 执行方式
$command = $_GET['md'] ?? '';
// 签名
$sign = $_GET['sign'] ?? '';
// 操作类型不存在
if(!in_array($command,$action)){
$this->returnJson(0,'操作类型不存在');
}
if(empty($sign)){
$this->returnJson(0,'数据签名不存在');
}
if(!$this->sign_verify($_GET,$sign)){
$this->returnJson(0,'数据签名验证失败');
}
// 操作类型
switch ($command){
case 'upload':
// 分片上传参数
$chunk = $_POST['chunk'] ?? 0;
$chunks = $_POST['chunks'] ?? 0;
// 目录策略信息
$folder_id = $_POST['folder_id'] ?? 0;
$policy_id = $_GET['policy_id'] ?? 0;
$root_folder_id = $_GET['root_folder_id'] ?? 0;
// 分片上传
if(!empty($chunks)){
//分片密钥
$chunks_key = $_POST['chunks_key'] ?? 0;
if(empty($chunks_key)){
$this->returnJson(0,'分片密钥错误');
}
$file = $_FILES["file"];
if(empty($file)){
$this->returnJson(0,'请上传分片文件');
}
// 分片存储目录
$chunk_path = $this->getUserChunkPath($_GET['uid']);
// 当前分片名称
$chunks_list_name = 'chunks_'.$_GET['uid'].'_'.$chunks_key;
// 分片列表
$chunks_list = $this->getChunkKeyFile($chunks_list_name,$chunk_path);
// 获取当前分片文件
$chunks_file = $this->getChunkFile($file);
// 当前分片文件名
$chunks_filename = 'chunks_'.$_GET['uid'].$this->getRandomName(16).'_'.$chunk;
$chunkObj = fopen ($chunk_path . self::DS .$chunks_filename.".chunk","w+");
$chunkObjWrite = fwrite ($chunkObj,$chunks_file);
if(!$chunkObj || !$chunkObjWrite){
$this->returnJson(0,'分片创建错误');
}
// 加入分片文件
$chunks_list[] = $chunks_filename;
// 保存分片key文件
$this->setChunkKeyFile($chunks_list_name,$chunk_path,$chunks_list);
// 判断分片是否上传完成
if($chunk == ($chunks - 1)){
// 融合文件名
$combine_name = "file_".$this->getRandomName(8);
// 打开融合文件hanlder
$fileObj = fopen($chunk_path.self::DS.$combine_name,"a+");
// 融合
foreach ($chunks_list as $value) {
$chunkObj = fopen($chunk_path.self::DS.$value.".chunk", "rb");
if(!$fileObj || !$chunkObj){
$this->returnJson(0,'文件创建失败');
}
$content = fread($chunkObj, (2 * 1024 * 1024));
fwrite($fileObj, $content, (2 * 1024 * 1024));
unset($content);
fclose($chunkObj);
unlink($chunk_path.self::DS.$value.".chunk");
}
// 获取保存目录
$save_dir = $this->getUserUploadPath($_GET['uid']);
// 文件后缀
$ext = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
// 随机文件名
$file_name = 'file_'.$this->getRandomName(16);
// 保存文件名
$save_file_name = $this->getFitSeparator($this->runtime_path.$save_dir) . $file_name.'.'.$ext;
if(!@rename($chunk_path.self::DS.$combine_name,$save_file_name)){
$this->returnJson(0,'融合文件创建失败');
}
$this->rmChunkKeyFile($chunks_list_name,$chunk_path);
$size = filesize($save_file_name);
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime_type = finfo_file($finfo,$save_file_name);
// 文件信息
$info = [
'uid' => $_GET['uid'],
'name' => $file['name'],
'ext' => $ext,
'path' => $save_dir . $file_name .'.'. $ext,
'size' => $size,
'mime' => $mime_type,
'folder_id' => ($folder_id == 0 ? $root_folder_id : $folder_id),
'policy_id' => $policy_id
];
// 回调通知
$res = $this->upload_notify($_GET['notify'],$info);
if($res != 'UPLOAD_SUCCESS'){
$this->returnJson(0,'同步错误：'.$res);
}
$this->returnJson(1,'上传文件成功');
}
$this->returnJson(1,$chunks_filename.'.chunk');
}
// 上传文件
$info = $this->upload_file($_GET['uid']);
// 额外参数
$info['uid'] = $_GET['uid'];
$info['folder_id'] = ($folder_id == 0 ? $root_folder_id : $folder_id);
$info['policy_id'] = $policy_id;
// 回调通知
$res = $this->upload_notify($_GET['notify'],$info);
if($res != 'UPLOAD_SUCCESS'){
$this->returnJson(0,'同步错误：'.$res);
}
$this->returnJson(1,'上传文件成功');
break;
case 'download':
// 下载操作
$tk = $_GET['tk'] ?? '';
$tk_info = $this->decodeTk($tk);
//获取下载文件位置
$download_file_path = $this->getFitSeparator($this->runtime_path . $tk_info['file']);
// 检查文件是否存在
if(!is_file($download_file_path)){
$this->returnJson(0,'下载文件不存在');
}
if ($tk_info['type'] == 'none'){
// 禁止下载
$this->returnJson(0,'禁止下载此文件');
}
// 启用 nginx X-Accel 下载
header('Content-Type: application/octet-stream');
$encoded_fname = rawurlencode($tk_info['origin']);
header('Content-Disposition: attachment;filename="'.$encoded_fname.'";filename*=utf-8'."''".$encoded_fname);
header('X-Accel-Redirect: '. $tk_info['file']);
header('X-Accel-Buffering: yes');
if ($tk_info['type'] > 0){
$_file_limit_size = round(intval($tk_info['type']) * 1024);
// 限速下载
header('X-Accel-Limit-Rate:'.$_file_limit_size);
}
break;
}
}
/**
* 解密tk
* @param $string
* @return array|false|string[]
* @throws Exception
*/
protected function decodeTk($string){
$data = str_replace(['-','_'],['+','/'],$string);
$mod4 = strlen($data) % 4;
if ($mod4) {
$data .= substr('====', $mod4);
}
$tk = base64_decode($data);
$tk_data = explode(',',$tk);
if(count($tk_data) != 4){
$this->returnJson(0,'下载文件失败，参数错误');
}
$keys = ['file','origin','type','time'];
return array_combine($keys,$tk_data);
}
/**
* 获取分片文件内容
* @return false|string
* @throws Exception
*/
protected function getChunkFile($file){
$size = $file['size'];
if($size > (2 * 1024 * 1024)){
$this->returnJson(0,'分片大小错误');
}
$chunk_fh = fopen($file['tmp_name'],'r');
$chunk_data = fread($chunk_fh,$size);
fclose($chunk_fh);
return $chunk_data;
}
/**
* 删除chunkKey文件
* @param $key
* @param $path
*/
protected function rmChunkKeyFile($key,$path){
unlink($path.$key.'.crx');
}
/**
* 读取chunkKey文件
* @param $key
* @param $path
* @return array|mixed
*/
protected function getChunkKeyFile($key,$path){
$file_name = $path.$key.'.crx';
if(!is_file($file_name)){
return [];
}
$content = file_get_contents($file_name);
$data = json_decode($content,true);
if(empty($data)){
return [];
}
return $data;
}
/**
* 写入chunkKey文件
* @param $key
* @param $path
* @param $data
* @return false|int
*/
protected function setChunkKeyFile($key,$path,$data){
$content = json_encode($data);
return file_put_contents($path.$key.'.crx',$content);
}
/**
* 上传文件到服务器
* @param $uid
* @return array
* @throws Exception
*/
protected function upload_file($uid): array
{
// 获取上传文件
$file = $_FILES["file"];
if(!$file){
$this->returnJson(0,'请选择需要上传的文件');
}
// 获取文件错误
if($file['error'] > 0){
$this->returnJson(0,'上传错误：'.$this->getFileUploadError($file['error']));
}
// 大于 2mb 用分片上传
if($file['size'] > $this->config['min_file_size']){
$this->returnJson(0,'上传方式错误：超出此方式大小');
}
// 文件后缀
$file_ext = strtolower(pathinfo($file['name'],PATHINFO_EXTENSION));
// 获取保存目录
$save_dir = $this->getUserUploadPath($uid);
// 获取保存文件夹
$file_name = 'file_'.$this->getRandomName(16);
// 最终保存路径
$save_file = $this->runtime_path . $save_dir . $file_name .'.'. $file_ext;
// 保存文件
move_uploaded_file($file["tmp_name"], $save_file);
if(!is_file($save_file)){
$this->returnJson(0,'文件上传失败：Error Move Files');
}
$size = filesize($save_file);
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mime_type = finfo_file($finfo,$save_file);
// 文件信息
return [
'name' => $file['name'],
'ext' => $file_ext,
'path' => $save_dir . $file_name .'.'. $file_ext,
'size' => $size,
'mime' => $mime_type
];
}
/**
* 获取用户上传目录
* @param $uid
* @return array|string|string[]
*/
protected function getUserUploadPath($uid){
$root = $this->runtime_path;
$path = $this->getFitSeparator($this->config['upload_path'] . date('Ymd') . self::DS . $uid . self::DS);
$save_path = $this->getFitSeparator($root.$path);
is_dir($save_path) || mkdir($save_path,0775,true);
return $path;
}
/**
* 获取分片上传目录
* @param $uid
* @return array|string|string[]
*/
protected function getUserChunkPath($uid){
$root = $this->runtime_path;
$path = $this->getFitSeparator($this->config['chunks_path'] . $uid . self::DS);
$save_path = $this->getFitSeparator($root.$path);
is_dir($save_path) || mkdir($save_path,0775,true);
return $save_path;
}
/**
* 获取随机文件名
* @param int $length
* @return string
*/
protected function getRandomName(int $length = 16): string
{
$charTable = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$result = "";
for ( $i = 0; $i < $length; $i++ ){
$result .= $charTable[ mt_rand(0, strlen($charTable) - 1) ];
}
return $result;
}
/**
* 获取一致化目录分隔符
* @param $dir
* @param string $ds
* @return array|string|string[]
*/
protected function getFitSeparator($dir, string $ds = ''){
$ds = empty($ds) ? self::DS : $ds;
return str_replace(['\\','/','\\\\','//'],$ds,$dir);
}
/**
* 获取文件上传错误
* @param $code
* @return bool|string
*/
protected function getFileUploadError($code){
switch ($code){
case 1:
// 文件大小超出了服务器的空间大小
return "The file is too large (server).";
case 2:
// 要上传的文件大小超出浏览器限制
return "The file is too large (form).";
case 3:
// 文件仅部分被上传
return "The file was only partially uploaded.";
case 4:
// 没有找到要上传的文件
return "No file was uploaded.";
case 5:
// 服务器临时文件夹丢失
return "The servers temporary folder is missing.";
case 6:
// 文件写入到临时文件夹出错
return "Failed to write to the temporary folder.";
}
return true;
}
/**
* 返回json内容
* @param $code
* @param $msg
* @param $data
* @return void
* @throws Exception
*/
protected function returnJson($code, $msg, $data = null){
$result = [
'code' => $code,
'msg' => $msg
];
if(is_array($data)){
$result = array_merge($result,$data);
}else if (is_string($data)){
$result['data'] = $data;
}
$json = json_encode($result);
throw new Exception($json,077);
}
/**
* 参数签名
* @param $params
* @return string
*/
protected function sign_params($params): string
{
// 过滤参数
$params = array_filter($params,function($key) use ($params){
if(empty($params[$key]) || $key == 'sign'){
return false;
}
return true;
},ARRAY_FILTER_USE_KEY);
// ascii排序
ksort($params);
reset($params);
// 签名
return md5(urldecode(http_build_query($params)) . $this->config['token']);
}
/**
* 签名验证
* @param $params
* @param $sign
* @return bool
*/
protected function sign_verify($params,$sign): bool
{
return $this->sign_params($params) == $sign;
}
/**
* 回调通知上传
* @param $url
* @param $param
* @return bool|string
*/
protected function upload_notify($url,$param)
{
// 生成签名
$sign = $this->sign_params($param);
$param['sign'] = $sign;
// 请求地址
$request_url = $url.'?'.urldecode(http_build_query($param));
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $request_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
}
Server::create(['token' => 'asdasfasfasfasfasfa', 'upload_path' => '/upload/']);