记录一个html5文件上传和接收的示例
前端
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
#droptarget {
height: 200px;
background: lightblue;
}
</style>
</head>
<body>
<div id="droptarget"></div>
<script src="./app.js"></script>
</body>
</html>
var droptarget = document.getElementById('droptarget');
function handleEvent(event) {
event.preventDefault();
var data, xhr;
if (event.type === 'drop') {
files = event.dataTransfer.files;
console.log(files);
data = new FormData();
for (let i = 0, len = files.length; i < len; ++i) {
data.append("file" + i, files[i]);
}
xhr = new XMLHttpRequest();
xhr.open('post', "http://localhost:10000/filetest");
xhr.onloadend = (e) => {
// console.log(e);
console.log(xhr);
}
xhr.send(data);
}
}
droptarget.addEventListener('dragover', handleEvent);
droptarget.addEventListener('drop', handleEvent);
nodejs koa后端demo
var koa = require('koa');
var app = koa();
var parse = require('co-busboy');
var fs = require('fs');
app
.use(function *(next) {
this.res.setHeader("Access-Control-Allow-Origin", "*");
this.res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
this.res.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE");
yield next;
})
.use(function *(next) {
if (this.request.is('multipart/*')) {
var parts = parse(this);
var part;
while (part = yield parts) {
part.pipe(fs.createWriteStream(part.fieldname));
}
this.body = 'ok';
}
})
;
if (!module.parent) {
app.listen(10000);
console.log('listening on port 10000');
}
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