PHP+JS实现文件分块上传的示例代码 - 源码论坛,商业源码下载,尽在锦尚中国商业源码论坛

<input type="file" id="file">
<input type="button" id="upload" value="上传">
<input type="button" id="stop" value="停止">
<input type="button" id="restart" value="继续上传">
上传进度：<span id="progress"></span>

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//获取节点
var fileForm = document.getElementById("file");
var uploadBtn = document.getElementById('upload');
var stopBtn = document.getElementById('stop');
var restartBtn = document.getElementById('restart');
//定义常量
const LENGTH = 100 * 1024;//每个上传的文件块大小(100KB)
var start = 0;
var end = LENGTH + start;
var blob;
var is_stop = 0;
var blob_num = 1;
var file = null;
var upload_instance = new Upload();
//上传事件
uploadBtn.onclick = function () {
upload_instance.addFileAndSend(fileForm);
return false;
}
stopBtn.onclick = function () {
upload_instance.stop();
return false;
}
restartBtn.onclick = function () {
upload_instance.start();
return false;
}
function Upload() {
//判断浏览器类型
if (window.XMLHttpRequest){
//IE7+, Firefox, Chrome, Opera, Safari
var xhr=new XMLHttpRequest();
}else{
//IE6, IE5
var xhr=new ActiveXObject("Microsoft.XMLHTTP");
}
//上传文件
this.addFileAndSend = function (that) {
file = that.files[0];
blob = cutFile(file);
//上传
uploadFile(blob, file);
blob_num += 1;
}
//停止文件上传
this.stop = function () {
xhr.abort();
is_stop = 1;
}
this.start = function () {
uploadFile(blob, file);
is_stop = 0;
}
//切割文件
function cutFile(file) {
var file_blob = file.slice(start, end);
start = end;
end = start + LENGTH;
return file_blob;
};
//上传文件
function uploadFile(blob, file) {
var form_data = new FormData();
var total_blob_num = Math.ceil(file.size / LENGTH);
//上传文件信息
form_data.append('file', blob);
//上传的第几个文件块
form_data.append('blob_num', blob_num);
//总文件块数
form_data.append('total_blob_num', total_blob_num);
//文件名称
form_data.append('file_name', file.name);
//上传
xhr.open('POST', './test.php', false);
xhr.onreadystatechange = function () {
//获取上传进度
if (total_blob_num == 1) {
progressText = '100%';
} else {
progressText = (Math.min(100, (blob_num / total_blob_num) * 100)).toFixed(2) + '%';
}
var progress = document.getElementById('progress');
progress.innerHTML = progressText;
//循环执行上传，直到所有文件块上传完成
var t = setTimeout(function () {
if (start < file.size && is_stop == 0) {
blob = cutFile(file);
uploadFile(blob, file);
blob_num += 1;
} else {
//所有文件块上传完成
}
}, 1000);
}
xhr.send(form_data);
//每次文件块上传后，清空上传信息
form_data = "";
}
}

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class Upload
{
/**
* @var string 上传目录
*/
private $filepath = './upload'; //上传目录
/**
* @var string 块文件临时存储的位置
*/
private $tmpPath;
/**
* @var integer 第几个文件块
*/
private $blobNum;
/**
* @var integer //文件块总数
*/
private $totalBlobNum;
/**
* @var string 上传文件名
*/
private $fileName;
public function __construct($tmpPath, $blobNum,$totalBlobNum,$fileName, $filepath = ''){
if (!empty($filepath)) {
$this->filepath = $filepath;
}
$this->tmpPath = $tmpPath;
$this->blobNum = $blobNum;
$this->totalBlobNum = $totalBlobNum;
$this->fileName = $fileName;
//保存文件块
$this->moveFile();
//保存文件
$this->fileMerge();
}
private function fileMerge(){
//当文件块都上传后将文件块整合成文件
if($this->blobNum == $this->totalBlobNum){
for($i=1; $i<= $this->totalBlobNum; $i++){
$blob = '';
$blob = file_get_contents($this->filepath.'/'. $this->fileName.'__'.$i);
file_put_contents($this->filepath.'/'. $this->fileName, $blob, FILE_APPEND );
unset($blob);
}
//删除文件块
$this->deleteFileBlob();
}
}
//删除文件块
private function deleteFileBlob(){
for($i=1; $i<= $this->totalBlobNum; $i++){
@unlink($this->filepath.'/'. $this->fileName.'__'.$i);
}
}
private function moveFile(){
$this->touchDir();
$filename = $this->filepath.'/'. $this->fileName.'__'.$this->blobNum;
//保存文件块
move_uploaded_file($this->tmpPath,$filename);
}
//上传返回
public function uploadReturn(){
if($this->blobNum == $this->totalBlobNum){
if(file_exists($this->filepath.'/'. $this->fileName)){
return [
'code' => 2,
'message' => 'success',
'file_path' => 'http://'.$_SERVER['HTTP_HOST'].str_replace('.','',$this->filepath).'/'. $this->fileName,
'local_path' => str_replace('.','',$this->filepath).'/'. $this->fileName
];
}
}
return [
'code' => 1,
'message' => 'waiting',
];
}
/**
* 创建目录
*/
private function touchDir(){
if(!file_exists($this->filepath)){
return mkdir($this->filepath);
}
}
}

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$tmpName = $_FILES['file']['tmp_name'];
$blobNum = $_POST['blob_num'];
$totalBlobNum = $_POST['total_blob_num'];
$fileName = $_POST['file_name'];
$upload = new Upload($tmpName, $blobNum, $totalBlobNum, $fileName);
$data = $upload->uploadReturn();
header('Content-type: application/json');
return json_encode($data);

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