php+resumablejs实现的分块上传 断点续传功能示例
发布时间：2020-12-12 22:06:05 所属栏目：PHP教程 来源：网络整理
导读：本篇章节讲解php+resumablejs实现的分块上传 断点续传功能。供大家参考研究具体如下： resumablejs官网 本站。 upload.html Select files upload.php `. Once all * the parts have been uploaded,a final destination file is * being created fr
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本篇章节讲解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 本站。 upload.html
Select files
upload.php `. 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}rn";
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($temp_dir);
}
}
}
////////////////////////////////////////////////////////////////////
// THE SCRIPT
////////////////////////////////////////////////////////////////////
//check if request is GET and the requested chunk exists or not. this makes testChunks work
if ($_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/1.0 200 Ok");
} else
{
header("HTTP/1.0 404 Not Found");
}
}
// loop through files and move the chunks to a temporarily created directory
if (!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
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