使用Html5实现异步上传文件,支持跨域,带有上传进度条

服务器准备iis

需要设置iis里面的http响应标头，如图添加如下设置，添加这项“access-control-allow-origin”，只有添加了这行才能支持跨域，不然像chrome浏览器会报错

页面代码：

xml/html code复制内容到剪贴板

<!doctype html>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<meta name="format-detection" content="telephone=no">
<meta name="msapplication-tap-highlight" content="no">
<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width">
<title>html5上传文件</title>
</head>
<body>
<div class="app">
<h1>html5上传文件测试，带进度条</h1>
<div>
<input type="file" value="" id="fileinput" name="files" onchange="fileselected()" />
<div style="margin:30px;">
<input type="button" value="上传" onclick="uploadfile()" />
</div>
<div style="margin:30px;">
<div id="filename"></div>
<div id="filesize"></div>
<div id="filetype"></div>
</div>
<div style="margin:30px;width:500px;height:15px;border:1px solid #aeaeae;">
<div id="progress" style="background:#4cff00;height:15px;width:0%;"></div>
<div id="percentnumber"></div>
</div>
<div style="margin:30px;">
<div id="msg"></div>
</div>
</div>
</div>
<script type="text/javascript">
function fileselected() {
//重置状态显示
document.getelementbyid("msg").innerhtml = "";
document.getelementbyid('percentnumber').innerhtml = '';
document.getelementbyid("progress").style.width = "0%";
var file = document.getelementbyid('fileinput').files[0];
if (file) {
var filesize = 0;
if (file.size > 1024 * 1024)
filesize = (math.round(file.size * 100 / (1024 * 1024)) / 100).tostring() + 'mb';
else
filesize = (math.round(file.size * 100 / 1024) / 100).tostring() + 'kb';
document.getelementbyid('filename').innerhtml = 'name: ' + file.name;
document.getelementbyid('filesize').innerhtml = 'size: ' + filesize;
document.getelementbyid('filetype').innerhtml = 'type: ' + file.type;
}
}
function uploadfile() {
var fd = new formdata();
fd.append("fileinput", document.getelementbyid('fileinput').files[0]);
var xhr = new xmlhttprequest();
xhr.upload.addeventlistener("progress", uploadprogress, false);
xhr.addeventlistener("load", uploadcomplete, false);
xhr.addeventlistener("error", uploadfailed, false);
xhr.addeventlistener("abort", uploadcanceled, false);
xhr.open("post", "http://10.0.0.200:9001/home/upload");//修改为自己服务器接口地址
//xhr.setrequestheader("access-control-allow-origin", "*");//需要在iis里面配置，就可以跨域请求了
//xhr.setrequestheader("content-type", "multipart/form-data");
xhr.send(fd);
}
function uploadprogress(evt) {
if (evt.lengthcomputable) {
var percentcomplete = math.round(evt.loaded * 100 / evt.total);
document.getelementbyid('percentnumber').innerhtml = percentcomplete + '%';
var jindutiao = document.getelementbyid("progress");
jindutiao.style.width = percentcomplete + "%";
}
else {
document.getelementbyid('percentnumber').innerhtml = '不支持进度计算';
}
}
function uploadcomplete(evt) {
//evt.target.responsetext
document.getelementbyid("msg").innerhtml = "上传成功";
}
function uploadfailed(evt) {
document.getelementbyid("msg").innerhtml = "上传过程中有一个错误";
}
function uploadcanceled(evt) {
document.getelementbyid("msg").innerhtml = "用户取消了上传或者浏览器删除了连接";
}
</script>
</body>
</html>

以上这篇使用html5实现异步上传文件,支持跨域,带有上传进度条就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。