１、项目中需要用到文件上传和显示进度，网上各种插件搞得头晕，决定自己实现一个
三个步骤：Ajax上传文件，获取上传进度，显示进度
html:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>jQuery File Upload Example</title> <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css"
integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> <!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap-theme.min.css"
integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous"> <!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"
integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa"
crossorigin="anonymous"></script> </head>
<body>
<form action="/upload_ajax/" enctype="multipart/form-data" method="POST"> <input type="file" id="file"/>
</form> <button id="btn">上传</button> <div class="progress" style="width: 500px">
<div id="progress-bar" class="progress-bar progress-bar-success progress-bar-striped" role="progressbar"
aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
<span class="sr-only">40% Complete (success)</span>
</div>
</div> <script src="/static/js/jquery-1.9.1.min.js"></script>
<script>
$(function () {
$("#btn").on('click', function () {
UploadFile();
}); $("#file").change(function () {
$("#progress-bar").css("width", 0);
}); // ajax + jQuery上传
function UploadFile() {
var xhrOnProgress = function (fun) {
xhrOnProgress.onprogress = fun; //绑定监听
//使用闭包实现监听绑
return function () {
//通过$.ajaxSettings.xhr();获得XMLHttpRequest对象
var xhr = $.ajaxSettings.xhr();
//判断监听函数是否为函数
if (typeof xhrOnProgress.onprogress !== 'function')
return xhr;
//如果有监听函数并且xhr对象支持绑定时就把监听函数绑定上去
if (xhrOnProgress.onprogress && xhr.upload) {
xhr.upload.onprogress = xhrOnProgress.onprogress;
}
return xhr;
}
} var file = $("#file")[0].files[0];
var form = new FormData();
form.append('myfile', file);
form.append("csrfmiddlewaretoken", '{{ csrf_token }}');
$.ajax({
type: 'POST',
url: '/uploadFile/',
data: form,
processData: false, // 告诉jquery不转换数据
contentType: false, // 告诉jquery不设置内容格式
xhr: xhrOnProgress(function (e) {
var percent = e.loaded / e.total;
$("#progress-bar").css("width", (percent * 500));
}), success: function (arg) {
console.log(arg); }
})
}
});
</script>
</body>
</html>
后台：
def upload_file(request):
if request.method == "POST": # 请求方法为POST时，进行处理
myFile = request.FILES.get("myfile", None) # 获取上传的文件，如果没有文件，则默认为None
if not myFile:
return HttpResponse("no files for upload!")
destination = open(os.path.join("/root/Desktop", myFile.name), 'wb+') # 打开特定的文件进行二进制的写操作
for chunk in myFile.chunks(): # 分块写入文件
destination.write(chunk)
destination.close()
return HttpResponse(myFile.name)
效果：
