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<?php
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namespace app\index\model;
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use think\Model;
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use \app\index\model\Option;
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class LocalAdapter extends Model{
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private $fileModel;
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private $policyModel;
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private $userModel;
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public function __construct($file,$policy,$user){
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$this->fileModel = $file;
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$this->policyModel = $policy;
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$this->userModel = $user;
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}
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/**
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* 获取文本文件内容
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*
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* @return string 内容
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*/
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public function getFileContent(){
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$filePath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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$fileObj = fopen($filePath,"r");
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$fileContent = fread($fileObj,filesize($filePath)+1);
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return $fileContent;
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}
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/**
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* 保存可编辑文件
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*
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* @param string $content 要保存的文件内容
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* @return void
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*/
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public function saveContent($content){
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$filePath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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file_put_contents($filePath, "");
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file_put_contents($filePath, $content);
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}
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/**
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* 输出预览文件
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*
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* @param boolean $isAdmin 是否为管理员请求
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* @return mixed 文件数据
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*/
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public function Preview($isAdmin = false){
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$speedLimit = Db::name('groups')->where('id',$this->userModel["user_group"])->find();
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$rangeTransfer = $speedLimit["range_transfer"];
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$speedLimit = $speedLimit["speed"];
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$sendFileOptions = Option::getValues(["download"]);
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if($sendFileOptions["sendfile"] == "1" && !empty($sendFileOptions)){
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$this->sendFile($speedLimit,$rangeTransfer,false,$sendFileOptions["header"]);
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}else{
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if($isAdmin){
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$speedLimit="";
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}
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if($speedLimit == "0"){
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exit();
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}else if(empty($speedLimit)){
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header("Cache-Control: max-age=10800");
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$this->outputWithoutLimit(false,$rangeTransfer);
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exit();
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}else if((int)$speedLimit > 0){
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header("Cache-Control: max-age=10800");
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$this->outputWithLimit($speedLimit);
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}
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}
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}
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/**
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* 使用Sendfile模式发送文件数据
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*
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* @param int $speed 下载限速
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* @param boolean $range 是否支持断点续传
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* @param boolean $download 是否为下载请求
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* @param string $header Sendfile Header
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* @return void
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*/
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private function sendFile($speed,$range,$download=false,$header="X-Sendfile"){
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$filePath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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$realPath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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if($header == "X-Accel-Redirect"){
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$filePath = '/public/uploads/' . $this->fileModel["pre_name"];
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}
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if($download){
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$filePath = str_replace("\\","/",$filePath);
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if($header == "X-Accel-Redirect"){
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ob_flush();
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flush();
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echo "s";
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}
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//保证如下顺序，否则最终浏览器中得到的content-type为'text/html'
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//1,写入 X-Sendfile 头信息
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$pathToFile = str_replace('%2F', '/', rawurlencode($filePath));
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header($header.": ".$pathToFile);
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//2,写入Content-Type头信息
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$mime_type = self::getMimetypeOnly($realPath);
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header('Content-Type: '.$mime_type);
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//3,写入正确的附件文件名头信息
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$orign_fname = $this->fileModel["orign_name"];
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$ua = $_SERVER["HTTP_USER_AGENT"]; // 处理不同浏览器的兼容性
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if (preg_match("/Firefox/", $ua)) {
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$encoded_filename = rawurlencode($orign_fname);
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header("Content-Disposition: attachment; filename*=\"utf8''" . $encoded_filename . '"');
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} else if (preg_match("/MSIE/", $ua) || preg_match("/Edge/", $ua) || preg_match("/rv:/", $ua)) {
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$encoded_filename = rawurlencode($orign_fname);
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header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
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} else {
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// for Chrome,Safari etc.
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header('Content-Disposition: attachment;filename="'. $orign_fname .'";filename*=utf-8'."''". $orign_fname);
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}
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exit;
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}else{
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$filePath = str_replace("\\","/",$filePath);
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header('Content-Type: '.self::getMimetype($realPath));
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if($header == "X-Accel-Redirect"){
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ob_flush();
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flush();
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echo "s";
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}
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header($header.": ".str_replace('%2F', '/', rawurlencode($filePath)));
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ob_flush();
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flush();
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}
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}
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/**
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* 无限速发送文件数据
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*
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* @param boolean $download 是否为下载
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* @param boolean $reload 是否支持断点续传
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* @return void
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*/
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public function outputWithoutLimit($download = false,$reload = false){
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ignore_user_abort(false);
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$filePath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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set_time_limit(0);
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session_write_close();
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$file_size = filesize($filePath);
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$ranges = $this->getRange($file_size);
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if($reload == 1 && $ranges!=null){
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header('HTTP/1.1 206 Partial Content');
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header('Accept-Ranges:bytes');
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header(sprintf('content-length:%u',$ranges['end']-$ranges['start']));
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header(sprintf('content-range:bytes %s-%s/%s', $ranges['start'], $ranges['end']-1, $file_size));
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}
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if($download){
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header('Cache-control: private');
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header('Content-Type: application/octet-stream');
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header('Content-Length: '.filesize($filePath));
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$encoded_fname = rawurlencode($this->fileModel["orign_name"]);
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header('Content-Disposition: attachment;filename="'.$encoded_fname.'";filename*=utf-8'."''".$encoded_fname);
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ob_flush();
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flush();
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}
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if(file_exists($filePath)){
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if(!$download){
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header('Content-Type: '.self::getMimetype($filePath));
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ob_flush();
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flush();
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}
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$fileObj = fopen($filePath,"rb");
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if($reload == 1){
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fseek($fileObj, sprintf('%u', $ranges['start']));
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}
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while(!feof($fileObj)){
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echo fread($fileObj,10240);
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ob_flush();
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flush();
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}
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fclose($fileObj);
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}
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}
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/**
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* 有限速发送文件数据
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*
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* @param int $speed 最大速度
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* @param boolean $download 是否为下载请求
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* @return void
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*/
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public function outputWithLimit($speed,$download = false){
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ignore_user_abort(false);
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$filePath = ROOT_PATH . 'public/uploads/' . $this->fileModel["pre_name"];
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set_time_limit(0);
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session_write_close();
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if($download){
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header('Cache-control: private');
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header('Content-Type: application/octet-stream');
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header('Content-Length: '.filesize($filePath));
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$encoded_fname = rawurlencode($this->fileModel["orign_name"]);
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header('Content-Disposition: attachment;filename="'.$encoded_fname.'";filename*=utf-8'."''".$encoded_fname);
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ob_flush();
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flush();
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}else{
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header('Content-Type: '.self::getMimetype($filePath));
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ob_flush();
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flush();
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}
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if(file_exists($filePath)){
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$fileObj = fopen($filePath,"r");
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while (!feof($fileObj)){
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echo fread($fileObj,round($speed*1024));
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ob_flush();
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flush();
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sleep(1);
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}
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fclose($fileObj);
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}
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}
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/**
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* 获取文件MIME Type
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*
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* @param string $path 文件路径
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* @return void
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*/
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static function getMimetype($path){
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//FILEINFO_MIME will output something like "image/jpeg; charset=binary"
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$finfoObj = finfo_open(FILEINFO_MIME);
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$mimetype = finfo_file($finfoObj, $path);
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finfo_close($finfoObj);
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return $mimetype;
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}
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/**
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* 获取文件MIME Type
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*
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* @param string $path 文件路径
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* @return void
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*/
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static function getMimetypeOnly($path){
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//FILEINFO_MIME_TYPE will output something like "image/jpeg"
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$finfoObj = finfo_open(FILEINFO_MIME_TYPE);
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$mimetype = finfo_file($finfoObj, $path);
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finfo_close($finfoObj);
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return $mimetype;
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}
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/**
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* 获取断点续传时HTTP_RANGE头
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*
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* @param int $file_size 文件大小
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* @return void
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*/
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private function getRange($file_size){
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if(isset($_SERVER['HTTP_RANGE']) && !empty($_SERVER['HTTP_RANGE'])){
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$range = $_SERVER['HTTP_RANGE'];
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$range = preg_replace('/[\s|,].*/', '', $range);
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$range = explode('-', substr($range, 6));
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if(count($range)<2){
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$range[1] = $file_size;
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}
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$range = array_combine(array('start','end'), $range);
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if(empty($range['start'])){
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$range['start'] = 0;
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}
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if(empty($range['end'])){
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$range['end'] = $file_size;
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}
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return $range;
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}
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return null;
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}
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}
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?>
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