本文主要和大家分享php和html5實作無刷新上傳的方法，主要以圖文的方法和大家分享，希望能幫助大家。
依網路改編----->>>>>>>>>
##理清思路：
引入了兩個概念：區塊（block）和片（chunk）。每個區塊由一到多個片組成，而一個資源則由一到多個區塊組成
區塊是服務端的永久資料儲存單位，片則只在分片上傳過程中作為暫存的單位。服務端會以約一個月為單位週期性的清除上傳後未被合併為區塊的資料片
#建立區塊（mkblk）、上傳片（bput）、建立資源（mkfile）。
################################## #
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.js" ></script>
<script src="./browser-md5-file.min.js" ></script>
<title>Document</title>
<style>
#progress{
width: 300px;
height: 20px;
background-color:#f7f7f7;
box-shadow:inset 0 1px 2px rgba(0,0,0,0.1);
border-radius:4px;
background-image:linear-gradient(to bottom,#f5f5f5,#f9f9f9);
}
#finish{
background-color: #149bdf;
background-image:linear-gradient(45deg,rgba(255,255,255,0.15) 25%,transparent 25%,transparent 50%,rgba(255,255,255,0.15) 50%,rgba(255,255,255,0.15) 75%,transparent 75%,transparent);
background-size:40px 40px;
height: 100%;
}
.upload{
margin-top: 40px;
}
.log
{
margin-top: 40px;
}
</style>
</head>
<body>
<p id="progress">
<p id="finish" style="width: 0%;" progress="0"></p>
<span id="rate"></span>
</p>
<p class="upload">
<input type="file" name="file" id="file">
<input type="button" value="开始上传" id="upstart">
<input type="button" value="停止" id="stop">
<input type="button" value="重新开始" id="restart">
</p>
<p class="log">
日志：<p id="plog"></p>
</p>
<script>
var fileForm = document.getElementById("file");
var upstartBtn = document.getElementById('upstart');
var stopBtn = document.getElementById('stop');
var startBtn = document.getElementById('restart');
var rate = document.getElementById('rate');
var plog = document.getElementById('plog');
//---------------------------
const LENGTH = 1024 * 1024 * 1;
var start = 0;
var end = start + LENGTH;
var blob;
var blob_num = 1;
var is_stop = 0
var file = null;
var md5filename = '';
//-----------------------------
var upload_instance = new Upload();
fileForm.onchange = function()
{
browserMD5File(fileForm.files[0], function (err, md5) {
md5filename = md5;
plog.innerHTML = '文件md5为：' + md5filename;
});
}
upstartBtn.onclick = function(){
upload_instance.addFileAndSend(fileForm);
}
stopBtn.onclick = function(){
upload_instance.stop();
}
startBtn.onclick = function(){
upload_instance.start();
}
function Upload(){
var xhr = new XMLHttpRequest();
var form_data = new FormData();
//对外方法，传入文件对象
this.addFileAndSend = function(that){
file = that.files[0];
blob = cutFile(file);
sendFile(blob,file);
blob_num += 1;
}
//停止文件上传
this.stop = function(){
xhr.abort();
is_stop = 1;
}
this.start = function(){
sendFile(blob,file);
is_stop = 0;
}
//切割文件
function cutFile(file){
console.log("start========"+start);
console.log("start========"+end);
var file_blob = file.slice(start,end);
start = end;
end = start + LENGTH;
return file_blob;
};
//发送文件
function sendFile(blob,file){
var total_blob_num = Math.ceil(file.size / LENGTH);
form_data.append('file',blob);
form_data.append('blob_num',blob_num);
form_data.append('total_blob_num',total_blob_num);
form_data.append('md5_file_name',md5filename);
form_data.append('file_name',file.name);
xhr.open('POST','./index.php',false);
xhr.onreadystatechange = function () {
console.log(xhr.readyState);
var progress;
var progressObj = document.getElementById('finish');
if(total_blob_num == 1){
progress = '100%';
}else{
progress = Math.min(100,(blob_num/total_blob_num)* 100 ) +'%';
}
console.log('progress-----'+progress);
progressObj.style.width = progress;
rate.innerHTML = progress;
var t = setTimeout(function(){
if(start < file.size && is_stop === 0){
blob = cutFile(file);
sendFile(blob,file);
blob_num += 1;
}else{
//setTimeout(t);
}
},1000);
}
console.log('test');
xhr.send(form_data);
}
}
</script>
</body>
</html>登入後複製
######後端code：###################
<?php
class Upload{
private $filepath = './upload'; //上传目录
private $tmpPath; //PHP文件临时目录
private $blobNum; //第几个文件块
private $totalBlobNum; //文件块总数
private $fileName; //文件名
private $md5FileName;
public function __construct($tmpPath,$blobNum,$totalBlobNum,$fileName, $md5FileName){
$this->tmpPath = $tmpPath;
$this->blobNum = $blobNum;
$this->totalBlobNum = $totalBlobNum;
$this->fileName = $this->createName($fileName, $md5FileName);
$this->moveFile();
$this->fileMerge();
}
//判断是否是最后一块，如果是则进行文件合成并且删除文件块
private function fileMerge(){
if($this->blobNum == $this->totalBlobNum){
$blob = '';
for($i=1; $i<= $this->totalBlobNum; $i++){
$blob .= file_get_contents($this->filepath.'/'. $this->fileName.'__'.$i);
}
file_put_contents($this->filepath.'/'. $this->fileName,$blob);
$this->deleteFileBlob();
}
}
//删除文件块
private function deleteFileBlob(){
for($i=1; $i<= $this->totalBlobNum; $i++){
@unlink($this->filepath.'/'. $this->fileName.'__'.$i);
}
}
//移动文件
private function moveFile(){
$this->touchDir();
$filename = $this->filepath.'/'. $this->fileName.'__'.$this->blobNum;
move_uploaded_file($this->tmpPath,$filename);
}
//API返回数据
public function apiReturn(){
if($this->blobNum == $this->totalBlobNum){
if(file_exists($this->filepath.'/'. $this->fileName)){
$data['code'] = 2;
$data['msg'] = 'success';
$data['file_path'] = 'http://'.$_SERVER['HTTP_HOST'].dirname($_SERVER['DOCUMENT_URI']).str_replace('.','',$this->filepath).'/'. $this->fileName;
}
}else{
if(file_exists($this->filepath.'/'. $this->fileName.'__'.$this->blobNum)){
$data['code'] = 1;
$data['msg'] = 'waiting for all';
$data['file_path'] = '';
}
}
header('Content-type: application/json');
echo json_encode($data);
}
//建立上传文件夹
private function touchDir(){
if(!file_exists($this->filepath)){
return mkdir($this->filepath);
}
}
private function createName($fileName, $md5FileName){
return $md5FileName . '.' . pathinfo($fileName)['extension'];
}
}
//实例化并获取系统变量传参
$upload = new Upload($_FILES['file']['tmp_name'],$_POST['blob_num'],$_POST['total_blob_num'],$_POST['file_name'],$_POST['md5_file_name']);
//调用方法，返回结果
$upload->apiReturn();登入後複製
###相關推薦：#########jQuery無刷新上傳圖片外掛############用jQuery外掛實作無刷新上傳檔案代碼分享############php實作頁面無刷新上傳檔案######
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