php download a single file and multi-file download package, support for HTTP
- HTTP functions unverified
- Nginx or apache need to specify the directory server static files, png, mp4, zip files and other suffixes,
- Download directly instantiate and call methods
<?php
/**
* User: LiZheng [email protected]
* Date: 2019/10/14
*/
namespace app\services;
use app\foundation\Service;
class DownloadService extends Service
{
private $_speed = 4096; // 下载速度, 未启用
/**
* 下载
* @param String $file 要下载的文件路径(此处我的路径为URL路径,非服务器上的绝对路径)
* @param String $name 文件名称,为空则与下载的文件名称一样
* @param boolean $reload 是否开启断点续传, 默认不开启
* @return string
* User: LiZheng [email protected]
* Date: 2019/10/14
*/
public function download($file, $name = '', $reload = false)
{
$filePath = explode(',', $file);
$count = count($filePath);
if($count > 1)
{
// TODO 生成zip打包下载
$zip = new \ZipArchive();
//服务器类型, WIN是本地,否则linux
$media_dir = strtoupper(substr(PHP_OS,0,3))==='WIN'?'d:/media_space':'/media_space';
$tmp = "cache/".date('Y-m-d')."/";
// 压缩文件的临时目录
$root_dir = $media_dir."/".$tmp;
//是否存在图片根目录,不存在则创建
if(!is_dir($root_dir))
{
//权限是否OK
mkdir($root_dir, 0777, true) && chmod($root_dir, 0777);
}
// 生成zip文件, 文件名要求唯一
$unique = md5((time().mt_rand(10,99).mt_rand(10,99))/mt_rand(1,100)).'.zip';
$root_dir .= $unique;
$URLs = PIC_HOST.$tmp.$unique;
touch($root_dir);
if($zip->open($root_dir) === true){
foreach ($filePath as $item){
$item = $media_dir.substr($item, strpos($item,'com.cn/')+6);
$zip->addFile($item, basename($item));
}
$zip->close();
$file = $URLs;
}else{
$this -> setError('压缩失败!');
return false;
}
}else
{
$file = $filePath[0];
}
$fp = @fopen($file, 'rb');
if ($fp) {
if ($name == '') {
$name = basename($file);
}
$header_array = get_headers($file, true);
//var_dump($header_array);die;
// 下载本地文件,获取文件大小
if (!$header_array) {
$file_size = filesize($file);
} else {
$file_size = $header_array['Content-Length'];
}
$ranges = $this->getRange($file_size);
$ua = $_SERVER["HTTP_USER_AGENT"];//判断是什么类型浏览器
header('cache-control:public');
header('content-type:application/octet-stream');
$encoded_filename = urlencode($name);
$encoded_filename = str_replace("+", "%20", $encoded_filename);
//解决下载文件名乱码
if (preg_match("/MSIE/", $ua) || preg_match("/Trident/", $ua)) {
header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
} else if (preg_match("/Firefox/", $ua)) {
header('Content-Disposition: attachment; filename*="utf8\'\'' . $name . '"');
} else if (preg_match("/Chrome/", $ua)) {
header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
} else {
header('Content-Disposition: attachment; filename="' . $name . '"');
}
//header('Content-Disposition: attachment; filename="' . $name . '"');
if ($reload && $ranges != null) { // 使用续传
header('HTTP/1.1 206 Partial Content');
header('Accept-Ranges:bytes');
// 剩余长度
header(sprintf('content-length:%u', $ranges['end'] - $ranges['start']));
// range信息
header(sprintf('content-range:bytes %s-%s/%s', $ranges['start'], $ranges['end'], $file_size));
//file_put_contents('test.log',sprintf('content-length:%u',$ranges['end']-$ranges['start']),FILE_APPEND);
// fp指针跳到断点位置
fseek($fp, sprintf('%u', $ranges['start']));
} else {
// file_put_contents('test.log', '2222', FILE_APPEND);
header('HTTP/1.1 200 OK');
header('Accept-Ranges:bytes');
header('content-length:' . $file_size);
}
while (!feof($fp)) {
//echo fread($fp, round($this->_speed*1024,0)); // 如限速,调用 setSpeed()
//echo fread($fp, $file_size);
echo fread($fp, 4096);
ob_flush();
}
($fp != null) && fclose($fp);
// TODO 删除临时文件压缩包
if(isset($root_dir))
{
unlink($root_dir);
}
} else {
$this -> setError('下载失败!');
return false;
}
}
/** 设置下载速度
* @param int $speed
*/
public function setSpeed($speed)
{
if (is_numeric($speed) && $speed > 16 && $speed < 4096) {
$this->_speed = $speed;
}
}
/** 获取header range信息
* @param int $file_size 文件大小
* @return Array
*/
private function getRange($file_size)
{
//file_put_contents('range.log', json_encode($_SERVER), FILE_APPEND);
if (isset($_SERVER['HTTP_RANGE']) && !empty($_SERVER['HTTP_RANGE'])) {
$range = $_SERVER['HTTP_RANGE'];
$range = preg_replace('/[\s|,].*/', '', $range);
$range = explode('-', substr($range, 6));
if (count($range) < 2) {
$range[1] = $file_size;
}
$range = array_combine(array('start', 'end'), $range);
if (empty($range['start'])) {
$range['start'] = 0;
}
if (empty($range['end'])) {
$range['end'] = $file_size;
}
return $range;
}
return null;
}
}