php实现大文件断点续传下载实例代码
发布:smiling 来源: PHP粉丝网 添加日期:2021-12-26 16:25:20 浏览: 评论:0
php实现大文件断点续传下载实例,看完你就知道超过100M以上的大文件如何断点传输了,这个功能还是比较经典实用的,毕竟大文件上传功能经常用得到。
- require_once('download.class.php');
- date_default_timezone_set('Asia/Shanghai');
- error_reporting(E_STRICT);
- function errorHandler($errno, $errstr, $errfile, $errline) {
- echo '<p>error:', $errstr, '</p>';
- exit();
- }
- set_error_handler('errorHandler');
- define('IS_DEBUG', true);
- $filePath = 'test.zip';
- $mimeType = 'audio/x-matroska';
- $range = isset($_SERVER['HTTP_RANGE']) ? $_SERVER['HTTP_RANGE'] : null;
- if (IS_DEBUG) {
- // $range = "bytes=1000-1999\n2000";
- // $range = "bytes=1000-1999,2000";
- // $range = "bytes=1000-1999,-2000";
- // $range = "bytes=1000-1999,2000-2999";
- }
- set_time_limit(0);
- $transfer = new Transfer($filePath, $mimeType, $range);
- if (IS_DEBUG) {
- $transfer->setIsLog(true);
- }
- $transfer->send();
- require_once('download.class.php');
- date_default_timezone_set('Asia/Shanghai');
- error_reporting(E_STRICT);
- function errorHandler($errno, $errstr, $errfile, $errline) {
- echo '<p>error:', $errstr, '</p>';
- exit();
- }
- set_error_handler('errorHandler');
- define('IS_DEBUG', true);
- $filePath = 'test.zip';
- $mimeType = 'audio/x-matroska';
- $range = isset($_SERVER['HTTP_RANGE']) ? $_SERVER['HTTP_RANGE'] : null;
- if (IS_DEBUG) {
- // $range = "bytes=1000-1999\n2000";
- // $range = "bytes=1000-1999,2000";
- // $range = "bytes=1000-1999,-2000";
- // $range = "bytes=1000-1999,2000-2999";
- }
- set_time_limit(0);
- $transfer = new Transfer($filePath, $mimeType, $range);
- if (IS_DEBUG) {
- $transfer->setIsLog(true);
- }
- $transfer->send();
download.class.php
- /**
- * 文件传输,支持断点续传。
- * 2g以上超大文件也有效
- * @author MoXie
- */
- class Transfer {
- /**
- * 缓冲单元
- */
- const BUFF_SIZE = 5120; // 1024 * 5
- /**
- * 文件地址
- * @var <String>
- */
- private $filePath;
- /**
- * 文件大小
- * @var <String> Php超大数字 字符串形式描述
- */
- private $fileSize;
- /**
- * 文件类型
- * @var <String>
- */
- private $mimeType;
- /**
- * 请求区域(范围)
- * @var <String>
- */
- private $range;
- /**
- * 是否写入日志
- * @var <Boolean>
- */
- private $isLog = false;
- /**
- *
- * @param <String> $filePath 文件路径
- * @param <String> $mimeType 文件类型
- * @param <String> $range 请求区域(范围)
- */
- function __construct($filePath, $mimeType = null, $range = null) {
- $this->filePath = $filePath;
- $this->fileSize = sprintf('%u', filesize($filePath));
- $this->mimeType = ($mimeType != null) ? $mimeType : "application/octet-stream"; // bin
- $this->range = trim($range);
- }
- /**
- * 获取文件区域
- * @return <Map> {'start':long,'end':long} or null
- */
- private function getRange() {
- /**
- * Range: bytes=-128
- * Range: bytes=-128
- * Range: bytes=28-175,382-399,510-541,644-744,977-980
- * Range: bytes=28-175\n380
- * type 1
- * RANGE: bytes=1000-9999
- * RANGE: bytes=2000-9999
- * type 2
- * RANGE: bytes=1000-1999
- * RANGE: bytes=2000-2999
- * RANGE: bytes=3000-3999
- */
- if (!emptyempty($this->range)) {
- $range = preg_replace('/[\s|,].*/', '', $this->range);
- $range = explode('-', substr($range, 6));
- if (count($range) < 2) {
- $range[1] = $this->fileSize; // Range: bytes=-100
- }
- $range = array_combine(array('start', 'end'), $range);
- if (emptyempty($range['start'])) {
- $range['start'] = 0;
- }
- if (!isset($range['end']) || emptyempty($range['end'])) {
- $range['end'] = $this->fileSize;
- }
- return $range;
- }
- return null;
- }
- /**
- * 向客户端发送文件
- */
- public function send() {
- $fileHande = fopen($this->filePath, 'rb');
- if ($fileHande) {
- // setting
- ob_end_clean(); // clean cache
- ob_start();
- ini_set('output_buffering', 'Off');
- ini_set('zlib.output_compression', 'Off');
- $magicQuotes = get_magic_quotes_gpc();
- // set_magic_quotes_runtime(0);
- // init
- $lastModified = gmdate('D, d M Y H:i:s', filemtime($this->filePath)) . ' GMT';
- $etag = sprintf('w/"%s:%s"', md5($lastModified), $this->fileSize);
- $ranges = $this->getRange();
- // headers
- header(sprintf('Last-Modified: %s', $lastModified));
- header(sprintf('ETag: %s', $etag));
- header(sprintf('Content-Type: %s', $this->mimeType));
- $disposition = 'attachment';
- if (strpos($this->mimeType, 'image/') !== FALSE) {
- $disposition = 'inline';
- }
- header(sprintf('Content-Disposition: %s; filename="%s"', $disposition, basename($this->filePath)));
- if ($ranges != null) {
- if ($this->isLog) {
- $this->log(json_encode($ranges) . ' ' . $_SERVER['HTTP_RANGE']);
- }
- header('HTTP/1.1 206 Partial Content');
- header('Accept-Ranges: bytes');
- header(sprintf('Content-Length: %u', $ranges['end'] - $ranges['start']));
- header(sprintf('Content-Range: bytes %s-%s/%s', $ranges['start'], $ranges['end'], $this->fileSize));
- //
- fseek($fileHande, sprintf('%u', $ranges['start']));
- } else {
- header("HTTP/1.1 200 OK");
- header(sprintf('Content-Length: %s', $this->fileSize));
- }
- // read file
- $lastSize = 0;
- while (!feof($fileHande) && !connection_aborted()) {
- $lastSize = sprintf("%u", bcsub($this->fileSize, sprintf("%u", ftell($fileHande))));
- if (bccomp($lastSize, self::BUFF_SIZE) > 0) {
- $lastSize = self::BUFF_SIZE;
- }
- echo fread($fileHande, $lastSize);
- ob_flush();
- flush();
- }
- set_magic_quotes_runtime($magicQuotes);
- ob_end_flush();
- }
- if ($fileHande != null) {
- fclose($fileHande);
- }
- }
- /**
- * 设置记录
- * @param <Boolean> $isLog 是否记录
- */
- public function setIsLog($isLog = true) {
- $this->isLog = $isLog;
- }
- /**
- * 记录
- * @param <String> $msg 记录信息
- */
- private function log($msg) {
- try {
- $handle = fopen('transfer_log.txt', 'a');
- fwrite($handle, sprintf('%s : %s' . PHP_EOL, date('Y-m-d H:i:s'), $msg));
- fclose($handle);
- } catch (Exception $e) {
- // null;
- }
- }
- }
Tags: php大文件断点续传
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