xhr2

0%

上传

//拖拽上传开始

//-1.禁止浏览器打开文件行为

document.addEventListener("drop",function(e){ //拖离

e.preventDefault();

})

document.addEventListener("dragleave",function(e){ //拖后放

e.preventDefault();

})

document.addEventListener("dragenter",function(e){ //拖进

e.preventDefault();

})

document.addEventListener("dragover",function(e){ //拖来拖去

e.preventDefault();

})

//上传进度

var pro = document.getElementById('prouploadfile');

var persent = document.getElementById('persent');

function clearpro(){

pro.value=0;

persent.innerHTML="0%";

}

//2.拖拽

var stopbutton = document.getElementById('stop');

var resultfile=""

var box = document.getElementById('drop_area'); //拖拽区域

box.addEventListener("drop",function(e){

var fileList = e.dataTransfer.files; //获取文件对象

console.log(fileList)

//检测是否是拖拽文件到页面的操作

if(fileList.length == 0){

return false;

}

//拖拉图片到浏览器，可以实现预览功能

//规定视频格式

//in_array

Array.prototype.S=String.fromCharCode(2);

Array.prototype.in_array=function(e){

var r=new RegExp(this.S+e+this.S);

return (r.test(this.S+this.join(this.S)+this.S));

};

var video_type=["video/mp4","video/ogg"];

//创建一个url连接,供src属性引用

var fileurl = window.URL.createObjectURL(fileList[0]);

if(fileList[0].type.indexOf('image') === 0){ //如果是图片

var str="";

document.getElementById('drop_area').innerHTML=str;

}else if(video_type.in_array(fileList[0].type)){ //如果是规定格式内的视频

var str="";

document.getElementById('drop_area').innerHTML=str;

}else{ //其他格式，输出文件名

//alert("不预览");

var str="文件名字:"+fileList[0].name;

document.getElementById('drop_area').innerHTML=str;

}

resultfile = fileList[0];

console.log(resultfile);

//切片计算

filesize= resultfile.size;

setsize=500*1024;

filecount = filesize/setsize;

//console.log(filecount)

//定义进度条

pro.max=parseInt(Math.ceil(filecount));

i =getCookie(resultfile.name);

i = (i!=null && i!="")?parseInt(i):0

if(Math.floor(filecount)

alert("已经完成");

pro.value=i+1;

persent.innerHTML="100%";

}else{

alert(i);

pro.value=i;

p=parseInt(i)*100/Math.ceil(filecount)

persent.innerHTML=parseInt(p)+"%";

}

},false);

//3.ajax上传

var stop=1;

function xhr2(){

if(stop==1){

return false;

}

if(resultfile==""){

alert("请选择文件")

return false;

}

i=getCookie(resultfile.name);

console.log(i)

i = (i!=null && i!="")?parseInt(i):0

if(Math.floor(filecount)

alert("已经完成");

return false;

}else{

//alert(i)

}

var xhr = new XMLHttpRequest();//第一步

//新建一个FormData对象

var formData = new FormData(); //++++++++++

//追加文件数据

//改变进度条

pro.value=i+1;

p=parseInt(i+1)*100/Math.ceil(filecount)

persent.innerHTML=parseInt(p)+"%";

//进度条

if((filesize-i*setsize)>setsize){

blobfile= resultfile.slice(i*setsize,(i+1)*setsize);

}else{

blobfile= resultfile.slice(i*setsize,filesize);

formData.append('lastone', Math.floor(filecount));

}

formData.append('file', blobfile);

//return false;

formData.append('blobname', i); //++++++++++

formData.append('filename', resultfile.name); //++++++++++

//post方式

xhr.open('POST', 'xhr2.php'); //第二步骤

//发送请求

xhr.send(formData); //第三步骤

stopbutton.innerHTML = "暂停"

//ajax返回

xhr.onreadystatechange = function(){ //第四步

if ( xhr.readyState == 4 && xhr.status == 200 ) {

console.log( xhr.responseText );

if(i

xhr2();

}else{

i=0;

}

}

};

//设置超时时间

xhr.timeout = 20000;

xhr.ontimeout = function(event){

alert('请求超时，网络拥堵！低于25K/s');

}

i=i+1;

setCookie(resultfile.name,i,365)

}

//设置cookie

function setCookie(c_name,value,expiredays)

{

var exdate=new Date()

exdate.setDate(exdate.getDate()+expiredays)

document.cookie=c_name+ "=" +escape(value)+

((expiredays==null) ? "" : ";expires="+exdate.toGMTString()+";path=/")

}

//获取cookie

function getCookie(c_name)

{

if (document.cookie.length>0)

{

c_start=document.cookie.indexOf(c_name + "=")

if (c_start!=-1)

{

c_start=c_start + c_name.length+1

c_end=document.cookie.indexOf(";",c_start)

if (c_end==-1) c_end=document.cookie.length

return unescape(document.cookie.substring(c_start,c_end))

}

}

return ""

}

function stopup(){

if(stop==1){

stop = 0

xhr2();

}else{

stop = 1

stopbutton.innerHTML = "继续"

}

}