php+resumablejs实现的分块上传断点续传功能示例

2024-05-04 22:48:02

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本文实例讲述了php+resumablejs实现的分块上传断点续传功能。分享给大家供大家参考，具体如下：

resumablejs官网 http://www.resumablejs.com/

本站下载地址。

upload.html

<!DOCTYPE html><html lang="en"><div> <a href="#" rel="external nofollow" id="browseButton" >Select files</a><div><div><input id="btnCancel" type="button" onClick='r.pause()'value="Cancel All Uploads"  style="margin-left: 2px; height: 22px; font-size: 8pt;" />   <br /></div><script src="resumable.js"></script><script>var r = new Resumable({ target:'upload.php', chunkSize:2*1024*1024, simultaneousUploads:4, testChunks:true, throttleProgressCallbacks:1,});r.assignBrowse(document.getElementById('browseButton'));r.on('fileSuccess', function(file){ // console.debug(file); });r.on('fileProgress', function(file){ // console.debug(file); });r.on('fileAdded', function(file, event){ r.upload(); //console.debug(file, event); });r.on('fileRetry', function(file){ //console.debug(file); });r.on('fileError', function(file, message){ //console.debug(file, message); });r.on('uploadStart', function(){ //console.debug(); });r.on('complete', function(){ //console.debug(); });r.on('progress', function(){ //console.debug(); });r.on('error', function(message, file){ //console.debug(message, file); });r.on('pause', function(file,message){ //console.debug(); });r.on('cancel', function(){ //console.debug(); });</script></html>

upload.php

<?php/** * This is the implementation of the server side part of * Resumable.js client script, which sends/uploads files * to a server in several chunks. * * The script receives the files in a standard way as if * the files were uploaded using standard HTML form (multipart). * * This PHP script stores all the chunks of a file in a temporary * directory (`temp`) with the extension `_part<#ChunkN>`. Once all  * the parts have been uploaded, a final destination file is * being created from all the stored parts (appending one by one). * * @author Gregory Chris (http://online-php.com) * @email www.online.php@gmail.com */////////////////////////////////////////////////////////////////////// THE FUNCTIONS/////////////////////////////////////////////////////////////////////** * * Logging operation - to a file (upload_log.txt) and to the stdout * @param string $str - the logging string */function _log($str) { // log to the output $log_str = date('d.m.Y').": {$str}/r/n"; echo $log_str; // log to file if (($fp = fopen('upload_log.txt', 'a+')) !== false) {  fputs($fp, $log_str);  fclose($fp); }}/** *  * Delete a directory RECURSIVELY * @param string $dir - directory path * @link http://php.net/manual/en/function.rmdir.php */function rrmdir($dir) { if (is_dir($dir)) {  $objects = scandir($dir);  foreach ($objects as $object) {   if ($object != "." && $object != "..") {    if (filetype($dir . "/" . $object) == "dir") {     rrmdir($dir . "/" . $object);     } else {     unlink($dir . "/" . $object);    }   }  }  reset($objects);  rmdir($dir); }}/** * * Check if all the parts exist, and  * gather all the parts of the file together * @param string $dir - the temporary directory holding all the parts of the file * @param string $fileName - the original file name * @param string $chunkSize - each chunk size (in bytes) * @param string $totalSize - original file size (in bytes) */function createFileFromChunks($temp_dir, $fileName, $chunkSize, $totalSize) { // count all the parts of this file $total_files = 0; foreach(scandir($temp_dir) as $file) {  if (stripos($file, $fileName) !== false) {   $total_files++;  } } // check that all the parts are present // the size of the last part is between chunkSize and 2*$chunkSize if ($total_files * $chunkSize >= ($totalSize - $chunkSize + 1)) {  // create the final destination file   if (($fp = fopen('temp/'.$fileName, 'w')) !== false) {   for ($i=1; $i<=$total_files; $i++) {    fwrite($fp, file_get_contents($temp_dir.'/'.$fileName.'.part'.$i));    _log('writing chunk '.$i);   }   fclose($fp);  } else {   _log('cannot create the destination file');   return false;  }  // rename the temporary directory (to avoid access from other   // concurrent chunks uploads) and than delete it  if (rename($temp_dir, $temp_dir.'_UNUSED')) {   rrmdir($temp_dir.'_UNUSED');  } else {   rrmdir($temp_dir);  } }}////////////////////////////////////////////////////////////////////// THE SCRIPT//////////////////////////////////////////////////////////////////////check if request is GET and the requested chunk exists or not. this makes testChunks workif ($_SERVER['REQUEST_METHOD'] === 'GET') { $temp_dir = 'temp/'.$_GET['resumableIdentifier']; $chunk_file = $temp_dir.'/'.$_GET['resumableFilename'].'.part'.$_GET['resumableChunkNumber']; if (file_exists($chunk_file)) {   header("HTTP/1.0 200 Ok");  } else  {   header("HTTP/1.0 404 Not Found");  } }// loop through files and move the chunks to a temporarily created directoryif (!empty($_FILES)) foreach ($_FILES as $file) { // check the error status if ($file['error'] != 0) {  _log('error '.$file['error'].' in file '.$_POST['resumableFilename']);  continue; } // init the destination file (format <filename.ext>.part<#chunk> // the file is stored in a temporary directory $temp_dir = 'temp/'.$_POST['resumableIdentifier']; $dest_file = $temp_dir.'/'.$_POST['resumableFilename'].'.part'.$_POST['resumableChunkNumber']; // create the temporary directory if (!is_dir($temp_dir)) {  mkdir($temp_dir, 0777, true); } // move the temporary file if (!move_uploaded_file($file['tmp_name'], $dest_file)) {  _log('Error saving (move_uploaded_file) chunk '.$_POST['resumableChunkNumber'].' for file '.$_POST['resumableFilename']); } else {  // check if all the parts present, and create the final destination file  createFileFromChunks($temp_dir, $_POST['resumableFilename'],     $_POST['resumableChunkSize'], $_POST['resumableTotalSize']); }}

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