javascript仿163网盘无刷新文件上传系统

时间:2020-05-12 人气:0

本来觉得这个系统会很复杂，但把每个部分都分析清楚后，其实需要的技术并不高。不过当我把各个功能函数都整理好准备进行封装时，却发现要把程序封装不是那么容易，因为程序跟html的耦合度太高。然后我逐步把程序中操作html相关的部分分离出来，首先把简单的分离，接着是文件列表，然后是file控件，最后是一些提示性程序。经过几次尝试才把整个结构封装好。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>仿163网盘无刷新文件上传系统</title> 
</head> 
<body> 
<style> 
.fu_list { 
width:600px; 
background:#ebebeb; 
font-size:12px; 
} 
.fu_list td { 
padding:5px; 
line-height:20px; 
background-color:#fff; 
} 
.fu_list table { 
width:100%; 
border:1px solid #ebebeb; 
} 
.fu_list thead td { 
background-color:#f4f4f4; 
} 
.fu_list b { 
font-size:14px; 
} 
/*file容器样式*/ 
a.files { 
width:90px; 
height:30px; 
overflow:hidden; 
display:block; 
border:1px solid #BEBEBE; 
background:url(/attachment.php?aid=8332&noupdate=yes) left top no-repeat; 
text-decoration:none; 
} 
a.files:hover { 
background-color:#FFFFEE; 
background-position:0 -30px; 
} 
/*file设为透明，并覆盖整个触发面*/ 
a.files input { 
margin-left:-350px; 
font-size:30px; 
cursor:pointer; 
filter:alpha(opacity=0); 
opacity:0; 
} 
/*取消点击时的虚线框*/ 
a.files, a.files input { 
outline:none;/*ff*/ 
hide-focus:expression(this.hideFocus=true);/*ie*/ 
} 
</style> 
<form id="uploadForm" action="File.ashx"> 
<table border="0" cellspacing="1" class="fu_list"> 
<thead> 
<tr> 
<td colspan="2"><b>上传文件</b></td> 
</tr> 
</thead> 
<tbody> 
<tr> 
<td align="right" width="15%" style="line-height:35px;">添加文件：</td> 
<td><a href="javascript:void(0);" class="files" id="idFile"></a> <img onerror="javascript:this.src='/skin1/img/error.jpg';" id="idProcess" style="display:none;" src="https://img.qb5200.com/download-x/20200511/25799.gif" /></td> 
</tr> 
<tr> 
<td colspan="2"><table border="0" cellspacing="0"> 
<thead> 
<tr> 
<td>文件路径</td> 
<td width="100"></td> 
</tr> 
</thead> 
<tbody id="idFileList"> 
</tbody> 
</table></td> 
</tr> 
<tr> 
<td colspan="2" style="color:gray">温馨提示：最多可同时上传 <b id="idLimit"></b> 个文件，只允许上传 <b id="idExt"></b> 文件。 </td> 
</tr> 
<tr> 
<td colspan="2" align="center" id="idMsg"><input type="button" value="开始上传" id="idBtnupload" disabled="disabled" /> 
    
<input type="button" value="全部取消" id="idBtndel" disabled="disabled" /> 
</td> 
</tr> 
</tbody> 
</table> 
</form> 
<script type="text/javascript"> 
var isIE = (document.all) ? true : false; 
var $ = function (id) { 
return "string" == typeof id ? document.getElementById(id) : id; 
}; 
var Class = { 
create: function() { 
return function() { 
this.initialize.apply(this, arguments); 
} 
} 
} 
var Extend = function(destination, source) { 
for (var property in source) { 
destination[property] = source[property]; 
} 
} 
var Bind = function(object, fun) { 
return function() { 
return fun.apply(object, arguments); 
} 
} 
var Each = function(list, fun){ 
for (var i = 0, len = list.length; i < len; i++) { fun(list[i], i); } 
}; 
//文件上传类 
var FileUpload = Class.create(); 
FileUpload.prototype = { 
//表单对象，文件控件存放空间 
initialize: function(form, folder, options) { 
this.Form = $(form);//表单 
this.Folder = $(folder);//文件控件存放空间 
this.Files = [];//文件集合 
this.SetOptions(options); 
this.FileName = this.options.FileName; 
this._FrameName = this.options.FrameName; 
this.Limit = this.options.Limit; 
this.Distinct = !!this.options.Distinct; 
this.ExtIn = this.options.ExtIn; 
this.ExtOut = this.options.ExtOut; 
this.onIniFile = this.options.onIniFile; 
this.onEmpty = this.options.onEmpty; 
this.onNotExtIn = this.options.onNotExtIn; 
this.onExtOut = this.options.onExtOut; 
this.onLimite = this.options.onLimite; 
this.onSame = this.options.onSame; 
this.onFail = this.options.onFail; 
this.onIni = this.options.onIni; 
if(!this._FrameName){ 
//为每个实例创建不同的iframe 
this._FrameName = "uploadFrame_" + Math.floor(Math.random() * 1000); 
//ie不能修改iframe的name 
var oFrame = isIE ? document.createElement("<iframe name=\"" + this._FrameName + "\">") : document.createElement("iframe"); 
//为ff设置name 
oFrame.name = this._FrameName; 
oFrame.style.display = "none"; 
//在ie文档未加载完用appendChild会报错 
document.body.insertBefore(oFrame, document.body.childNodes[0]); 
} 
//设置form属性，关键是target要指向iframe 
this.Form.target = this._FrameName; 
this.Form.method = "post"; 
//注意ie的form没有enctype属性，要用encoding 
this.Form.encoding = "multipart/form-data"; 
//整理一次 
this.Ini(); 
}, 
//设置默认属性 
SetOptions: function(options) { 
this.options = {//默认值 
FileName: "",//文件上传控件的name，配合后台使用 
FrameName: "",//iframe的name，要自定义iframe的话这里设置name 
onIniFile: function(){},//整理文件时执行(其中参数是file对象) 
onEmpty: function(){},//文件空值时执行 
Limit:0,//文件数限制，0为不限制 
onLimite: function(){},//超过文件数限制时执行 
Distinct: true,//是否不允许相同文件 
onSame: function(){},//有相同文件时执行 
ExtIn: [],//允许后缀名 
onNotExtIn: function(){},//不是允许后缀名时执行 
ExtOut: [],//禁止后缀名，当设置了ExtIn则ExtOut无效 
onExtOut: function(){},//是禁止后缀名时执行 
onFail: function(){},//文件不通过检测时执行(其中参数是file对象) 
onIni: function(){}//重置时执行 
}; 
Extend(this.options, options || {}); 
}, 
//整理空间 
Ini: function() { 
//整理文件集合 
this.Files = []; 
//整理文件空间，把有值的file放入文件集合 
Each(this.Folder.getElementsByTagName("input"), Bind(this, function(o){ 
if(o.type == "file"){ o.value && this.Files.push(o); this.onIniFile(o); } 
})) 
//插入一个新的file 
var file = document.createElement("input"); 
file.name = this.FileName; file.type = "file"; file.onchange = Bind(this, function(){ this.Check(file); this.Ini(); }); 
this.Folder.appendChild(file); 
//执行附加程序 
this.onIni(); 
}, 
//检测file对象 
Check: function(file) { 
//检测变量 
var bCheck = true; 
//空值、文件数限制、后缀名、相同文件检测 
if(!file.value){ 
bCheck = false; this.onEmpty(); 
} else if(this.Limit && this.Files.length >= this.Limit){ 
bCheck = false; this.onLimite(); 
} else if(!!this.ExtIn.length && !RegExp("\.(" + this.ExtIn.join("|") + ")$", "i").test(file.value)){ 
//检测是否允许后缀名 
bCheck = false; this.onNotExtIn(); 
} else if(!!this.ExtOut.length && RegExp("\.(" + this.ExtOut.join("|") + ")$", "i").test(file.value)) { 
//检测是否禁止后缀名 
bCheck = false; this.onExtOut(); 
} else if(!!this.Distinct) { 
Each(this.Files, function(o){ if(o.value == file.value){ bCheck = false; } }) 
if(!bCheck){ this.onSame(); } 
} 
//没有通过检测 
!bCheck && this.onFail(file); 
}, 
//删除指定file 
Delete: function(file) { 
//移除指定file 
this.Folder.removeChild(file); this.Ini(); 
}, 
//删除全部file 
Clear: function() { 
//清空文件空间 
Each(this.Files, Bind(this, function(o){ this.Folder.removeChild(o); })); this.Ini(); 
} 
} 
var fu = new FileUpload("uploadForm", "idFile", { Limit: 3, ExtIn: ["jpg", "gif"], 
onIniFile: function(file){ file.value ? file.style.display = "none" : this.Folder.removeChild(file); }, 
onEmpty: function(){ alert("请选择一个文件"); }, 
onLimite: function(){ alert("超过上传限制"); }, 
onSame: function(){ alert("已经有相同文件"); }, 
onNotExtIn: function(){ alert("只允许上传" + this.ExtIn.join("，") + "文件"); }, 
onFail: function(file){ this.Folder.removeChild(file); }, 
onIni: function(){ 
//显示文件列表 
var arrRows = []; 
if(this.Files.length){ 
var oThis = this; 
Each(this.Files, function(o){ 
var a = document.createElement("a"); a.innerHTML = "取消"; a.href = "javascript:void(0);"; 
a.onclick = function(){ oThis.Delete(o); return false; }; 
arrRows.push([o.value, a]); 
}); 
} else { arrRows.push(["<font color='gray'>没有添加文件</font>", " "]); } 
AddList(arrRows); 
//设置按钮 
$("idBtnupload").disabled = $("idBtndel").disabled = this.Files.length <= 0; 
} 
}); 
$("idBtnupload").onclick = function(){ 
//显示文件列表 
var arrRows = []; 
Each(fu.Files, function(o){ arrRows.push([o.value, " "]); }); 
AddList(arrRows); 
fu.Folder.style.display = "none"; 
$("idProcess").style.display = ""; 
$("idMsg").innerHTML = "正在添加文件到您的网盘中，请稍候……
有可能因为网络问题，出现程序长时间无响应，请点击"<a href='?'><font color='red'>取消</font></a>"重新上传文件"; 
//fu.Form.submit(); 
} 
//用来添加文件列表的函数 
function AddList(rows){ 
//根据数组来添加列表 
var FileList = $("idFileList"), oFragment = document.createDocumentFragment(); 
//用文档碎片保存列表 
Each(rows, function(cells){ 
var row = document.createElement("tr"); 
Each(cells, function(o){ 
var cell = document.createElement("td"); 
if(typeof o == "string"){ cell.innerHTML = o; }else{ cell.appendChild(o); } 
row.appendChild(cell); 
}); 
oFragment.appendChild(row); 
}) 
//ie的table不支持innerHTML所以这样清空table 
while(FileList.hasChildNodes()){ FileList.removeChild(FileList.firstChild); } 
FileList.appendChild(oFragment); 
} 
$("idLimit").innerHTML = fu.Limit; 
$("idExt").innerHTML = fu.ExtIn.join("，"); 
$("idBtndel").onclick = function(){ fu.Clear(); } 
//在后台通过window.parent来访问主页面的函数 
function Finish(msg){ alert(msg); location.href = location.href; } 
</script> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

在线演示 http://img.jb51.net/online/FileUpload/FileUpload.htm
打包文件下载 http://xiazai.jb51.net/200810/yuanma/FileUpload.rar

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