php+resumablejs实现的分块上传断点续传功能示例

2024-02-25 12:30:06 190

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




Selectfiles

upload.php

`.Onceall
*thepartshavebeenuploaded,afinaldestinationfileis
*beingcreatedfromallthestoredparts(appendingonebyone).
*
*@authorGregoryChris(http://online-php.com)
*@emailwww.online.php@gmail.com
*/
////////////////////////////////////////////////////////////////////
//THEFUNCTIONS
////////////////////////////////////////////////////////////////////
/**
*
*Loggingoperation-toafile(upload_log.txt)andtothestdout
*@paramstring$str-theloggingstring
*/
function_log($str){
//logtotheoutput
$log_str=date('d.m.Y').":{$str}\r\n";
echo$log_str;
//logtofile
if(($fp=fopen('upload_log.txt','a+'))!==false){
fputs($fp,$log_str);
fclose($fp);
}
}
/**
*
*DeleteadirectoryRECURSIVELY
*@paramstring$dir-directorypath
*@linkhttp://php.net/manual/en/function.rmdir.php
*/
functionrrmdir($dir){
if(is_dir($dir)){
$objects=scandir($dir);
foreach($objectsas$object){
if($object!="."&&$object!=".."){
if(filetype($dir."/".$object)=="dir"){
rrmdir($dir."/".$object);
}else{
unlink($dir."/".$object);
}
}
}
reset($objects);
rmdir($dir);
}
}
/**
*
*Checkifallthepartsexist,and
*gatherallthepartsofthefiletogether
*@paramstring$dir-thetemporarydirectoryholdingallthepartsofthefile
*@paramstring$fileName-theoriginalfilename
*@paramstring$chunkSize-eachchunksize(inbytes)
*@paramstring$totalSize-originalfilesize(inbytes)
*/
functioncreateFileFromChunks($temp_dir,$fileName,$chunkSize,$totalSize){
//countallthepartsofthisfile
$total_files=0;
foreach(scandir($temp_dir)as$file){
if(stripos($file,$fileName)!==false){
$total_files++;
}
}
//checkthatallthepartsarepresent
//thesizeofthelastpartisbetweenchunkSizeand2*$chunkSize
if($total_files*$chunkSize>=($totalSize-$chunkSize+1)){
//createthefinaldestinationfile
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('writingchunk'.$i);
}
fclose($fp);
}else{
_log('cannotcreatethedestinationfile');
returnfalse;
}
//renamethetemporarydirectory(toavoidaccessfromother
//concurrentchunksuploads)andthandeleteit
if(rename($temp_dir,$temp_dir.'_UNUSED')){
rrmdir($temp_dir.'_UNUSED');
}else{
rrmdir($temp_dir);
}
}
}
////////////////////////////////////////////////////////////////////
//THESCRIPT
////////////////////////////////////////////////////////////////////
//checkifrequestisGETandtherequestedchunkexistsornot.thismakestestChunkswork
if($_SERVER['REQUEST_METHOD']==='GET'){
$temp_dir='temp/'.$_GET['resumableIdentifier'];
$chunk_file=$temp_dir.'/'.$_GET['resumableFilename'].'.part'.$_GET['resumableChunkNumber'];
if(file_exists($chunk_file)){
header("HTTP/1.0200Ok");
}else
{
header("HTTP/1.0404NotFound");
}
}
//loopthroughfilesandmovethechunkstoatemporarilycreateddirectory
if(!empty($_FILES))foreach($_FILESas$file){
//checktheerrorstatus
if($file['error']!=0){
_log('error'.$file['error'].'infile'.$_POST['resumableFilename']);
continue;
}
//initthedestinationfile(format.part<#chunk>
//thefileisstoredinatemporarydirectory
$temp_dir='temp/'.$_POST['resumableIdentifier'];
$dest_file=$temp_dir.'/'.$_POST['resumableFilename'].'.part'.$_POST['resumableChunkNumber'];
//createthetemporarydirectory
if(!is_dir($temp_dir)){
mkdir($temp_dir,0777,true);
}
//movethetemporaryfile
if(!move_uploaded_file($file['tmp_name'],$dest_file)){
_log('Errorsaving(move_uploaded_file)chunk'.$_POST['resumableChunkNumber'].'forfile'.$_POST['resumableFilename']);
}else{
//checkifallthepartspresent,andcreatethefinaldestinationfile
createFileFromChunks($temp_dir,$_POST['resumableFilename'],
$_POST['resumableChunkSize'],$_POST['resumableTotalSize']);
}
}

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php+resumablejs实现的分块上传 断点续传功能示例

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