<form method="POST" name="form" action="/mupload/upload/" enctype="multipart/form-data">
<input type='hidden' name='csrfmiddlewaretoken' value='' />
<input id='file' type='file' name='file' onchange="" />
<input id='button' name='submit' type='button' value="上傳" onclick="chunk_upload(this)"/>
</form> 

var fileSplitSize = 1024 * 1024;
var start=0,end=0;
var i=0;
// 文件段上傳
function chunk_upload(button){
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "/chunk_upload/upload/", false);
xmlhttp.setRequestHeader("X-CSRFToken", button.form['csrfmiddlewaretoken'].value);
var f = button.form;
var file = f['file']['files'][0];
var size=file.size;
end=start+fileSplitSize;
if(end>size){
i=-1;
end=size;
}else{
i+=1;
end=end;
}<br>　　//按大小切割文件段
var blob = file.slice(start, end);
xmlhttp.setRequestHeader('charset','utf-8');
xmlhttp.setRequestHeader("fileMD5", fileMD5);
xmlhttp.setRequestHeader("start", start);
xmlhttp.setRequestHeader("end", end);
xmlhttp.send(blob);
if(xmlhttp.status==200){<br> if(end==size){<br> var backtext=xmlhttp.responseText;<br> alert(backtext);<br> }else{<br> alert("上傳完成第"+i+"段")<br> start=end;<br> chunk_upload(button);<br> }<br> }else{<br> alert("上傳錯誤");<br> chunk_upload(button);<br> }
} 

;(function(window,document){
var myUpload = function(option) {
var file,
fd = new FormData(),
xhr = new XMLHttpRequest(),
loaded, tot, per, uploadUrl,input;
input = document.createElement("input");
input.setAttribute('id',"myUpload-input");
input.setAttribute('type',"file");
input.setAttribute('name',"files");
input.click();
uploadUrl = option.uploadUrl;
callback = option.callback;
uploading = option.uploading;
beforeSend = option.beforeSend;
input.onchange= function(){
file = input.files[0];
if(beforeSend instanceof Function){
if(beforeSend(file) === false){
return false;
}
}
fd.append("files", file);
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
if(callback instanceof Function){
callback(xhr.responseText);
}
}
}
//偵查當前附件上傳情況
xhr.upload.onprogress = function(evt) {
loaded = evt.loaded;
tot = evt.total;
per = Math.floor(100 * loaded / tot); //已經(jīng)上傳的百分比
if(uploading instanceof Function){
uploading(per);
}
};
xhr.open("post", uploadUrl);
xhr.send(fd);
}
};
window.myUpload = myUpload;
})(window,document);
//用法
//觸發(fā)文件上傳事件
myUpload({
//上傳文件接收地址
uploadUrl: "/async/myUpload.php",
//選擇文件后，發(fā)送文件前自定義事件
//file為上傳的文件信息，可在此處做文件檢測、初始化進度條等動作
beforeSend: function(file) {
},
//文件上傳完成后回調(diào)函數(shù)
//res為文件上傳信息
callback: function(res) {
},
//返回上傳過程中包括上傳進度的相關(guān)信息
//詳細請看res,可在此加入進度條相關(guān)代碼
uploading: function(res) {
}
});