ie8及以下浏览器不支持ajax来上传文件，可通过iframe来实现无刷新上传，原理参考post跨越请求
示例：
<!DOCTYPE html>
<html>
<head>
<title>ie8-无刷新上传</title>
<meta charset="utf-8">
<script type="text/javascript">
function suc(data) {
console.log(document.myFrame.document.body.innerHTML);
}
</script>
</head>
<body>
<form action="http://localhost:8080/api" target="myFrame" method="post">
<input type="file" name="test">
<input type="submit" value="提交" onclick="submit()">
</form>
<iframe name="myFrame" onload="suc()" style="display: none;"></iframe>
</body>
</html>
server.js
const express = require('express');
const fs = require('fs');
const mime = require('mime');
const path = require('path');
const app = express();
app.post('/api',function(req,res){
res.send(`服务器数据`);
})
app.get('/*', function(req,res){
sendFile(req, res);
});
app.listen(8080);
console.log('listen 8080')
function sendFile(req,res){
var realPath = __dirname+req.url;
var exist = fs.existsSync(realPath);
if(exist){
var file = fs.readFileSync(realPath);
res.writeHead(200, {
'Content-Type': mime.getType(path.basename(realPath)),
});
res.end(file);
console.log('send static file:'+realPath);
} else {
res.writeHead(404);
}
}
注意：
- 服务器X-Frame-Options不能设置成DENY
- 使用该方式获取子页面数据，父子页面需要在同域下