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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="http://apps.bdimg.com/libs/bootstrap/3.3.4/js/bootstrap.min.js"></script>
<script src="http://cdn.bootcss.com/blueimp-md5/1.1.0/js/md5.min.js"></script>
<link rel="stylesheet" href="http://apps.bdimg.com/libs/bootstrap/3.3.4/css/bootstrap.min.css">
<title>HTML5 文件API</title>
<style>
span{
display: block;
}
.progress-outer{
width: 150px;
height: 25px;
background: #ccc;
border-radius: 5px;
}
.file-progress{
height: 100%;
background: #28a051;
color: white;
border-radius: 5px;
}
</style>
</head>
<body>
<div class="row">
<div class="col-md-6">
<form class="form-inline" role="form">
<div class="form-group">
<label class="form-label">选择文件: </label>
<input type="file" class="form-control" id="fileinput">
</div>
<div class="form-group">
<a id="submit" data-target="#progress-modal" data-toggle="modal" class="btn btn-xs btn-primary">SUBMIT</a>
</div>
</form>
</div>
</div>
<div class="modal fade" id="progress-modal">
<div class="modal-dialog" style="width: 1200px;">
<div class="modal-content">
<div class="modal-header">
上传进度
</div>
<div class="modal-body">
<table class="table table-striped">
<thead>
<tr>
<th>文件名</th>
<th>文件大小</th>
<th>更新时间</th>
<th>上传进度</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr></tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
<script>
$("body").on("click", "#submit", function(){
var files = document.querySelector("#fileinput").files;
console.log(files)
if(!files.length){
alert("当前没有选择文件");
return false;
}
/**
* 获取基本信息
*/
var fileInfoStr = '<td>' + files[0].name + '</td>' +
'<td>' + files[0].size + '</td>' +
'<td>' + files[0].lastModifiedDate + '</td>' +
'<td><span id="progress-outer"><span class="file-progress"></span></span></td>' +
'<td><button id="restart" class="btn btn-xs btn-primary">重新上传</button> ' +
'<button id="stop" class="btn btn-xs btn-primary">停止上传</button> ' +
'<button id="continue" class="btn btn-xs btn-primary">继续上传</button></td>';
$(".table tbody tr").html(fileInfoStr);
/**
* 开始上传
*/
var md5info = md5(files[0].name);
//相关变量
var startPos = parseInt(window.localStorage.getItem(md5info)) || 0,
file = files[0],
stepSize = 1 * 1024 * 1024,
totalStep = Math.ceil(file.size / stepSize),
fileSize = file.size;
if(startPos === totalStep - 1){
alert("当前文件已上传，请不要重复上传");
return false;
}
var reader = new FileReader();
readBlob();
reader.onload = function(e){
loadedCb(e);
}
//停止
$("body").on("click", "#stop", function(){
reader = null;
return false;
}).on("click", "#continue", function(){
reader = new FileReader();
reader.onload = function(e){
loadedCb(e);
}
startPos = parseInt(window.localStorage.getItem(md5info));
readBlob();
}).on("click", "#restart", function(){
if(!reader){
reader = new FileReader();
reader.onload = function(e){
loadedCb(e);
}
}
startPos = 0;
readBlob();
})
//分段读取函数
function readBlob(){
var blob;
if(file.webkitSlice){
blob = file.webkitSlice(stepSize * startPos, stepSize * (startPos + 1));
}else if(file.mozSlice){
blob = file.mozSlice(stepSize * startPos, stepSize * (startPos + 1));
}else if(file.slice){
blob = file.slice(stepSize * startPos, stepSize * (startPos + 1));
}else{
alert("浏览器不支持分段读取");
return false;
}
reader && reader.readAsArrayBuffer(blob);
}
//读取完成回调
function loadedCb(e){
//计算进度
var fileLoaded = startPos * stepSize + e.total,
percent = Math.floor(fileLoaded / fileSize * 100) + '%';
$(".file-progress").text(percent).css('width', percent);
//保存进度
window.localStorage.setItem(md5info, startPos);
//是否继续
if(startPos < totalStep - 1){
startPos++
setTimeout(readBlob, 2000)
//readBlob();
}else{
$(".file-progress").text('100%');
window.localStorage.removeItem(md5info);
alert("上传成功啦")
}
}
})
</script>
</body>
</html>