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283
common/FileHelper.php
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283
common/FileHelper.php
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<?php
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namespace app\common;
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use yii\helpers\BaseFileHelper;
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use Yii;
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/**
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* Class FileHelper
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* @package common\helpers
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* @author jianyan74 <751393839@qq.com>
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*/
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class FileHelper extends BaseFileHelper
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{
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public $_speed = 0;
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/**
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* 检测目录并循环创建目录
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*
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* @param $catalogue
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*/
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public static function mkdirs($catalogue)
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{
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if (!file_exists($catalogue)) {
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self::mkdirs(dirname($catalogue));
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mkdir($catalogue, 0777);
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exec('chown -R www.www '.$catalogue);
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}
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return true;
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}
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/**
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* 写入日志
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*
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* @param $path
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* @param $content
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* @return bool|int
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*/
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public static function writeLog($path, $content)
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{
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$use_num = self::sysProbe();
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// $use_num = Yii::$app->redis->get(CacheKeyEnum::SYSTEM_PROBE);
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if ($use_num > 98) {
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return false;
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}
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self::mkdirs(dirname($path));
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return file_put_contents($path, date('Y-m-d H:i:s') . ">>>" . $content . "\r\n", FILE_APPEND);
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}
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/**
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* 检测磁盘空间
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* @return bool|int|string
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*/
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public static function sysProbe()
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{
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$total = round(@disk_total_space(".") / (1024 * 1024 * 1024), 2);
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$free = round(@disk_free_space(".") / (1024 * 1024 * 1024), 2);
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$use_num = intval($total - $free) ? : 1;
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// exec("df -h", $systemInfo);
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// $disk = $systemInfo[5] ?? $systemInfo[1]; //没有找到其他磁盘就默认第一个
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// $use_num = 1;
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// if ($disk) {
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// $use_num = trim(substr($disk, -10, -7)) ? : 1; //媒介保后端服务器磁盘用量
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// }
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// Yii::$app->redis->setex(CacheKeyEnum::SYSTEM_PROBE, 3600, $use_num);
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return $use_num;
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}
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/**
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* 获取文件夹大小
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*
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* @param string $dir 根文件夹路径
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* @return int
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*/
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public static function getDirSize($dir)
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{
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$handle = opendir($dir);
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$sizeResult = 0;
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while (false !== ($FolderOrFile = readdir($handle))) {
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if ($FolderOrFile != "." && $FolderOrFile != "..") {
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if (is_dir("$dir/$FolderOrFile")) {
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$sizeResult += self::getDirSize("$dir/$FolderOrFile");
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}
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else {
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$sizeResult += filesize("$dir/$FolderOrFile");
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}
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}
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}
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closedir($handle);
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return $sizeResult;
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}
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/**
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* 基于数组创建目录
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*
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* @param $files
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*/
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public static function createDirOrFiles($files)
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{
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foreach ($files as $key => $value) {
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if (substr($value, -1) == '/') {
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mkdir($value);
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}
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else {
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file_put_contents($value, '');
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}
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}
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}
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/**
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* 文件大小字节转换对应的单位
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* @param $size
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* @return string
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*/
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public static function convert($size)
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{
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$unit = array('b','kb','MB','GB','tb','pb');
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return round($size / pow(1024, ($i = floor(log($size, 1024)))), 2) . '' . $unit[$i];
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}
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public static function downloadVideo($url)
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{
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// $is_url = Url::isUrl($url);
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// if (!$is_url) {
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// exit('不是正确的链接地址'); //exit掉，下载下来打开会显示无法播放，格式不支持，文件已损坏等
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// }
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//获取文件信息
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// $fileExt = pathinfo($url);
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//获取文件的扩展名
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// $allowDownExt = array ('mp4', 'mov');
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//检测文件类型是否允许下载
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// if (!in_array($fileExt['extension'], $allowDownExt)) {
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// exit('不支持该格式');
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// }
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// 设置浏览器下载的文件名，这里还以原文件名一样
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$filename = basename($url);
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// 获取远程文件大小
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// 注意filesize()无法获取远程文件大小
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$headers = get_headers($url, 1);
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$fileSize = $headers['Content-Length'];
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if (ini_get('zlib.output_compression')) {
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ini_set('zlib.output_compression', 'Off');
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}
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header_remove('Content-Encoding');
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// 设置header头
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// 因为不知道文件是什么类型的，告诉浏览器输出的是字节流
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header('Content-Type: application/octet-stream');
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// 告诉浏览器返回的文件大小类型是字节
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header('Accept-Ranges:bytes');
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// 告诉浏览器返回的文件大小
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header('Content-Length: ' . $fileSize);
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// 告诉浏览器文件作为附件处理并且设定最终下载完成的文件名称
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header('Content-Disposition: attachment; filename="' . $filename . '"');
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//针对大文件，规定每次读取文件的字节数为4096字节，直接输出数据
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$read_buffer = 4096; //4096
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$handle = fopen($url, 'rb');
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//总的缓冲的字节数
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$sum_buffer = 0;
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//只要没到文件尾，就一直读取
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while (!feof($handle) && $sum_buffer < $fileSize) {
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echo fread($handle, $read_buffer);
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$sum_buffer += $read_buffer;
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}
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fclose($handle);
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exit;
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}
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/**
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* @param String $file 要下载的文件路径
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* @param String $name 文件名称,为空则与下载的文件名称一样
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* @param boolean $reload 是否开启断点续传
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* @return string
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*/
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public static function downloadFile($file, $name = '', $reload = false)
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{
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$log_path = Yii::getAlias('@runtime') . '/api/' . date('Ym') . '/' . date('d') . '/download.txt';
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FileHelper::writeLog($log_path, $file);
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$fp = fopen($file, 'rb');
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if ($fp) {
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if ($name == '') {
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$name = basename($file);
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}
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$header_array = get_headers($file, true);
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// 下载本地文件，获取文件大小
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if (!$header_array) {
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$file_size = filesize($file);
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} else {
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$file_size = $header_array['Content-Length'];
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}
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FileHelper::writeLog($log_path, json_encode($_SERVER, JSON_UNESCAPED_UNICODE));
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if (isset($_SERVER['HTTP_RANGE']) && !empty($_SERVER['HTTP_RANGE'])) {
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$ranges = self::getRange($file_size);
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} else {
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//第一次连接
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$size2 = $file_size - 1;
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header("Content-Range: bytes 0-$size2/$file_size"); //Content-Range: bytes 0-4988927/4988928
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header("Content-Length: " . $file_size); //输出总长
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}
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$ua = $_SERVER["HTTP_USER_AGENT"];//判断是什么类型浏览器
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header('cache-control:public');
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header('content-type:application/octet-stream');
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$encoded_filename = urlencode($name);
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$encoded_filename = str_replace("+", "%20", $encoded_filename);
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//解决下载文件名乱码
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if (preg_match("/MSIE/", $ua) || preg_match("/Trident/", $ua)) {
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header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
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} else if (preg_match("/Firefox/", $ua)) {
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header('Content-Disposition: attachment; filename*="utf8\'\'' . $name . '"');
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} else if (preg_match("/Chrome/", $ua)) {
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header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
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} else {
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header('Content-Disposition: attachment; filename="' . $name . '"');
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}
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//header('Content-Disposition: attachment; filename="' . $name . '"');
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if ($reload && $ranges != null) { // 使用续传
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header('HTTP/1.1 206 Partial Content');
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header('Accept-Ranges:bytes');
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// 剩余长度
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header(sprintf('content-length:%u', $ranges['end'] - $ranges['start']));
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// range信息
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header(sprintf('content-range:bytes %s-%s/%s', $ranges['start'], $ranges['end'], $file_size));
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FileHelper::writeLog($log_path, sprintf('content-length:%u', $ranges['end'] - $ranges['start']));
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// fp指针跳到断点位置
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fseek($fp, sprintf('%u', $ranges['start']));
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} else {
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header('HTTP/1.1 200 OK');
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header('content-length:' . $file_size);
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}
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while (!feof($fp)) {
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echo fread($fp, 4096);
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ob_flush();
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}
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($fp != null) && fclose($fp);
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} else {
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return '';
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}
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}
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/** 设置下载速度
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* @param int $speed
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*/
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public function setSpeed($speed)
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{
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if (is_numeric($speed) && $speed > 16 && $speed < 4096) {
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$this->_speed = $speed;
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}
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}
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/** 获取header range信息
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* @param int $file_size 文件大小
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* @return Array
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*/
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private static function getRange($file_size)
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{
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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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